MAINTENANCE MANUAL ARC FUSION SPLICER FSM 40S LEVEL 2

Transcription

1 KSP (3) MAINTENANCE MANUAL ARC FUSION SPLICER FSM 40S LEVEL 2 Fujikura Proprietary Document No part of this document may be transferred to any third party without prior written consent from Fujikura Ltd.

2 Page 2 Table of Contents 1. Introduction Notes to users Warning and Cautions for Maintenance Abbreviations General Overview Composition of FSM-40S Basics and Preparations Cleaning and checking before adjustment Accessing Secret Menu s and Secret Key Functions Secret Menu Password Total Initialization of all data (Emergency only) Mechanical Assembly Focus/Camera Assembly Camera Assembly Electrode Unit Assembly Z-Axis Unit Assembly Z-Axis Unit Assembly Sheath Clamp Top Fiber Clamp Arm Setting Clamp Top Mechanical Adjustment Installing Focus Unit Installing Z-Unit Installing Tube Heater Installing Wind Protector Installing Power Unit Dock to Base-Frame Adjusting the Set-Plate Position to the V-groove Adjusting Z-Clamp Unit Height Adjustment Fiber Clamp Position Adjusting Display Image Rough Adjusting Display Image Adjusting Camera Inclination Image Alignment Wind Protector Mirror Adjustment Adjustment of XY Unit Confirmation of XY adjustment condition Confirmation of Swing-arm Travel Adjustment of Focus Motor LS-dog s Position Adjustment of Focus-Mechanical-Stopper s Position Confirmation of Z Motor End Play...42

3 Page Install the Discharge Circuit Installing Monitor Installing Connector Box Installing Panel Tube Heater Adjustment Adjust Tube Heater Temperature Splice Test Estimate Check Stuff Check Arc Calibration Electrical PCB Connection How to: Replace PCB Preparations before Replacement Removal of PCB Installation of PCB Adjusting Voltage Indicator for 40S Software Upgrade Software Upgrade with Programming Chip Device Software Upgrade with RS-232C cable Install of PCUG software Upgrading of software Data Download Software with RS-232C Trouble Shooting ERROR 01 Too Long Fiber ERROR 01 Too Long Fiber ERROR 03 Fiber too Dusty ERROR 04 Motor Overrun ERROR 05 Close Cover ERROR 06 Cover Opened Error ERROR 07 Motor Trouble ERROR 08 Fiber Judge Error ERROR 09 (ARC) Calibration Error ERROR 10 Fiber Separate Error ERROR 11 Fiber Set Error Splicer does not boot up Heater Trouble Appendices The Check-Sheet for the Adjusting Display Image List of the necessary tools for FSM-40S adjustment...67

4 1. Introduction Page 4 This manual describes the mechanical assembly, adjustment, and maintenance of Fujikura s FSM-40S fusion splicer. When maintaining the FSM-40S, it is important to locate the exact problem and make the necessary repairs properly. This manual will provide processes to repair the FSM-40S in a safe, concise, and easy to follow manner for a qualified technician.

5 2. Notes to users Page Warning and Cautions for Maintenance This maintenance manual also includes safety requirements. Read this manual carefully before performing any maintenance procedure to the splicer. Keep this manual in a safe place. Fujikura Ltd. accepts no responsibility for personal injury or physical loss including equipment damage resulting from improper use or modification. Alert Symbol This maintenance manual indicates warnings and cautions by using alert symbols. It is important to understand what it means. WARNING There is a possibility of personal death or serious injury resulting from improper use by ignoring this indication. CAUTION There is a possibility of personal injury or physical loss resulting from improper use by ignoring this indication. Example of Alert Symbol Symbol means Pay Attention. The left symbol indicates Pay attention to explosion. Symbol means Must not do. The left symbol indicates You must not disassemble. Symbol means Must do. The left symbol indicates You must disconnect the AC power cord from the wall socket or the appliance inlet.

6 Page 6 WARNING The appliance inlet is used to disconnect the power cord when you disassemble the splicer. Check to insert the all connector correctly before packaging. Never maintain the splicer in an environment where flammable liquid or vapor exists. Extremely dangerous fire and explosion could result from the splicer s electrical arc in such an environment. Do not disassemble or modify AC adapter and battery pack. In particular, do not remove or bypass any electrical or mechanical device (e.g. a fuse or safety switch) incorporated into the design and manufacturing of this equipment. Check the connector to insert correctly before discharging. During arc discharge, the electrodes generate high voltage and high temperature, and it causes personal injury. Do not touch the electrodes during the maintain (though arc discharge stops when the wind protector is opened). Turn the splicer power off, and disconnect the AC power cord (or remove the battery pack) when replacing the electrodes. This equipment is designed for splicing optical glass fiber for telecommunication. Do not attempt to splice any materials other than the optical glass fibers. Never use a canned type air cleaner to remove dust, or to clean the splicer. The electrical arc may ignite any remaining gas mixture. Safety glass should always be worn during the fiber preparation and the splicing process. A glass fiber fragment can be extremely dangerous if it comes into contact with the eye, skin, or is ingested. Use only specified power supply unit and proper AC power source. Only the AC adapter / battery charger (ADC-07) or the battery pack (BTR-04) can be used for supplying power to the splicer. Proper AC power source to the ADC-07 is AC V, 50-60Hz. Check the AC power source before use. Improper AC power source out of the range can cause personal injury, emitting smoke or equipment damage. Abnormal high AC output voltage or frequency from an AC generator is a common fault. Measure the output AC voltage by a circuit tester before connecting the AC power cord. Improper high voltage or frequency from generator causes personal injury, emitting smoke or equipment damage. Use only specified AC power cord. Do not put a heavy object on the power cord. Also, do not pull, heat up or modify the power cord. Using an improper cord or a damaged cord can result in a fire, emitting smoke, equipment damage or personal injury.

7 Page 7 WARNING Connect the AC power cord properly to the appliance inlet and wall socket. When inserting the AC plug, confirm no dust or dirt on terminals, and insert it to the end. Incomplete connection can cause a fire, emitting smoke or personal injury. Connect the AC adapter / battery charger to electrical ground when using it. It is possible to connect through a third pin of AC plug. No connection to electrical ground can cause personal injury. Use only the specified battery charger (ADC-07) to recharge the battery pack (BTR-04) with a battery charger cord (DCC-08). Personal injury or equipment damage can result from using not specified battery charger. Proper AC power source to the ADC-07 is AC V, 50-60Hz. Check the AC power source before use. Improper AC power source can cause personal injury, emitting smoke or equipment damage. The appliance inlet is used to disconnect the power cord when the splicer is abnormal. Be sure to position the splicer so that it is easy to disconnect the power cord. Disconnect the AC power cord from the appliance inlet or the wall socket when the equipment emits smoke or bad smell, or is noisy or heated up. Leaving the abnormal condition can cause a fire, personal injury or equipment damage. Disconnect the AC power cord from the appliance inlet or the wall socket when the equipment is damaged (e.g. by dropping). It may cause personal injury or equipment damage. Disconnect the AC power cord from the appliance inlet or the wall socket when liquid (e.g. water) or an object (e.g. screw) enters to inside the splicer. It can cause personal injury or equipment damage. Do not touch the splicer, AC power cord and AC plug with a wet hand. It can cause personal injury. Do not operate and maintain the splicer when it is wet with dew. It can cause personal injury or equipment damage. Do not use the splicer in circumstance of extremely hot temperature. It may cause personal injury or equipment damage. Do not throw the battery pack away into a fire. Or, do not heat it up. It can cause a dangerous explosion. Do not short-circuit both terminals of the battery pack and the AC adapter / battery charger. Large electrical current can cause personal injury, a fire or equipment damage.

8 Page 8 CAUTION Do not store the equipment in any area where extreme heat and humidity are present. It may cause equipment damage. During / after heating the splice protector, do not touch the ceramic heater and the splice protector. The high temperature may cause personal injury. Do not place the splicer at an unstable place. In a case of dropping the equipment, it can cause personal injury or equipment damage. Precise adjustment and alignment have been made to this splicer. Do not give a strong shock. Use a carrying case to transport and store the splicer. The carrying case will prevent damage and provide protection from moisture, vibration and shock during storage and transportation. Keep the splicer free from sand or dust. It degrades the splicing performance. Replace the electrodes properly. Only specified electrodes can be used. Set the new electrodes to the correct position. Replace the electrodes as a pair. Not following the above cautions can cause abnormal discharge. And, it can result in equipment damage or degrading the splicing quality. Do not use any other chemical except alcohol to clean the objective lens, V-groove, mirror, LCD monitor, body and so on. Doing so may cause blurring, discoloration or deterioration. The splicer requires no lubrication. Oil may degrade the performance and damage the splicer. Repair or re-adjustment should be performed by an authorized engineer, except the electrodes replacement. Failure to repair the equipment can result in personal injury or equipment damage. Please contact a sales agency in your country.

9 2.2. Abbreviations Page 9 Cap screw: Set screw: WS2: WF2: Phillips-head screw: Countersunk screw: Pan-head screw: T=20: SLG: Hexagon Socket Head Cap Screw Hexagon Socket Set Screw Small Circular Washer of 2 mm in nominal diameter Finished Circular Washer of 2 mm in nominal diameter Cross Recessed Phillips-head Screw Cross Recessed Countersink head Screw Cross Recessed Pan-head Screw Tightening Torque is 20kgf cm. (1kgf cm = 9.80N cm) Screw Locking Glue 2.3. General Overview Composition of FSM-40S FSM-40S composes of the following unit. (1) XY unit (2) Heater unit (3) Focus unit (4) Base unit (5) Electrode unit (6) Battery unit (7) Z axis unit (8) Monitor unit (9) Wind Protector unit

10 Page Basics and Preparations Name of keys Refer to Fig ON/OFF key MENU key key HELP key ARC key X/Y key MENU ON / OFF HELP ARC X/Y RESET HEAT EXIT ENT SET EXIT key ENT key RESET key SET key HEAT key Fig <ON/OFF> key Turns power on and off. To turn off power, press and hold key untill the LED color changes from green to red. <HELP> key Displays [HELP] screen. <ARC> key Executes re-arc discharge at end of splicing. <X/Y> key Selects frame image display, X-direction enlarged, Y-direction enlarged or X-Y direction composite image. <RESET> key Return system to [READY] state from any state. <HEAT> key States tube heater heat cycle <SET> key Start splicing operation. This key is also used to cancel monitor power saving state. <MENU> key Open [Main Menu] screen. According to circumstances, changes manual drive motor. <EXIT> key Return system to previous menu screen. <ENT> key Execute or select command or parameter on menu screen. < >< > key Used to move cursor or change parameters. According to circumstances, drives XY-motor or Focus-motor manually. < >< > key Used to change pages. According to circumstances, drives Z-motor manually.

11 Page Cleaning and checking before adjustment Before adjustment, do the following work. Refer to INSTRUCTION MANUAL for FSM-40S for further information. Clean V-grooves Clean Fiber Clamp Chips Clean Wind Protector Mirrors

12 Page Accessing Secret Menu s and Secret Key Functions Secret Menu At READY, press UP, DOWN and MENU at the same time. Secret Menu consists of 4 pages. Using Secret Menu, software version needs to be later than V Page 1 of 5 Secret Menu 1/5 Corner Check Camera Position Focus & Electrode Estimate Test Stuff Check Config Code Disp Config Code Input +ENT:Select :Change Page EXIT:Exit Corner Check Background brightness indicator. Camera Position - Use when aligning camera mechanical position. Focus & Electrode Use when adjusting focus and position of electrodes. Estimate Test Estimation confirmation test. Stuff Check Checks stuff amount. Specification = 30±5. Config Code Disp. - Config Code includes many calibration parameters for the splicer. These codes have a relation to the following: Serial Number, ICORE, Heater Calibration, Fiber Parameter, Voltage Adjust Parameter and others. Config Code Input - This command should be used after replacing the CPU Board Page 2 of 5 Secret Menu 2/5 Heater Adjustment Heat AD bit Heat AD bit Voltage Adjustment AD-12V 152bit Heater Adjustment Use when calibrating heater unit Heat AD-250/100 Result of Heater Adjustment Voltage Adjustment Use when calibrating voltage value AD-12V Result of Voltage Adjustment +ENT:Select :Change Page EXIT:Exit Page 3 of 5 Secret Menu 3/5 Splice Database Init Splice Mode Init. Heater Mode Init. Utility Init. +ENT:Select :Change Page EXIT:Exit Splice Database Init. - Initializes splice database area and the database area to the condition when shipped. When database area is upgraded, perform this command. Splice Mode Init. - Initializes all arc parameters of all 100 splice modes in both the user programmable area and the database area to the condition when shipped from the factory. The splicer software on the ROM chip contains these initial parameters Heater Mode Init. - Initializes all heater parameters of all 40 heater modes in both the user programmable area and the database area to the condition when shipped from the factory. The splicer software on the ROM chip contains these initial parameters. Utility Init. - Initializes all parameter of Utility including Configurations.

13 Page 13 Page 4 of 5 Secret Menu 4/5 Arc Count Input Total Arc Count Input True AP1 True AP2 True AP3 Gap Center +ENT:Select :Change Page EXIT:Exit Arc Count Input - Edits Arc Count Total Arc Count Input - Edits Total Arc Count True AP1, AP2, AP3, and Gap Center - Result of ARC CALIBRATION Page 5 of 5 Secret Menu 5/5 Focus Home Adjustment FCS Home X 1500ms FCS Home Y 1600ms +ENT:Select :Change Page EXIT:Exit Focus Home Adjustment Use when calibrating Focus Home Position FCS Home X, Y Result of Focus Home Adjustment. Input Port Status. Shows status of all Input Port and A/D Converters. Note - Only RESET switch is available to exit this menu S0 MENU UP DOWN LEFT RIGHT ENT EXIT S1 HELP SET ARC X/Y L-FoXR L-FoXF L-XR L-XF S2 L-ZRR L-ZRF L-ZLR L-ZLF L-FoYF L-FoYR L-YR L-YF IN2 COVER L-TEMP H-Temp3 H-Temp2 H-Temp1 HEAT RESET IN4 Magnet2 Magnet1 AD Voltage Pressure Temp Humid Heater3 Heater2 Heater1 (MENU UP DOWN..etc ) is Key Pad. Slanting Font (L-????) is Limit Switch. For example, L-ZRF is limit of ZR motor, Forward direction. COVER is window protector cover magnet sensor. L-TEMP: if heater temp is lower than finish temp setting, ON. H-Temp 1: if heater temp is higher than heating temp setting, ON. H-Temp2 and 3 are not used. Magnet 1 and 2 are magnet sensors, which are used to judge power source type. Heater 2 and 3 are not used.

14 Page Password Factory password to enter Configurations is ARUKIJUF. Note - After entering Secret Mode, password is no longer required Total Initialization of all data (Emergency only) With splicer off, press MENU, EXIT, and X/Y at the same time and hold, then press the ON/OFF to turn the splicer on. Note - All Parameters of All Splice Modes, All Heater Modes, Utility, and Secret are initialized to program set values.

15 3. Mechanical Assembly Page Focus/Camera Assembly Camera Assembly 1. Refer to Fig for steps 2 ~ Attached Kyoutou-Mirror onto Kyoutou with cap screw (M2 6, T=2, SLG). 3. Insert 0.3mm thick Lens-Liner between Lens and Kyoutou. Screw Lens in Kyoutou. 4. Insert CCD-Adapter with CCD-Camera into Kyoutou, and attach with set screw (M3 3, T=2). Note-Pay attention the direction of installation CCD-Adapter for X and Y positions (Refer to Fig ). Objective Lens Don t remove! Lens Shim (t=0.3) (S1330M-03-03) Don t remove! Kyoutou (S1330M-03-01) CCD Camera Unit (S1330R-12) Set screw M3 3 (T=2) Kyoutou Mirror (S1330R-16) Not reverse Cap screw M2 6 (T=2, SLG) Fig Kyoutou Y Unit Kyoutou X Unit Attention Connector position Fig

16 Page Refer to Fig for steps 5 ~ Attach Focus Adjuster on Kyoutou Unit with cap screw (M3 10, T= temporary, WS3) 7. Attach Focus Arm Joint Plate on Kyoutou with cap screw (M3 10, T= temporary, WS3) Cap screw M3 10 (WS3) Cap screw M3 10 (WS3) Fig Focus Adjuster (S1330M-03-12) Focus Arm Joint Plate (S1330M-03-07)

17 Page Electrode Unit Assembly Description Refer to Fig The electrode unit consists of the electrode unit, electrode, and LED. Phillips-head screw (M2 8, T=2) is used with the anode electrode holder and the cathode electrode holder to secure the electrodes. The chamfered electrode holder (holds V-groove LED) is located on the cathode side. Phillips-head screw M2 8 (T=2) Cathode Electrode Holder (S1330R-05) V-Groove LED Cathode Electrode leaf Spring Phillips head screw M2 4 (T=2, SLG) Pan head screw M2 8 (T=2) Electrode Anode Electrode Holder (S1330R-04) Anode Electrode leaf Spring Screw Stopper (S1330M-01-10) Phillips-head screw M2 8 (T=2) Electrode Phillips head screw M2 4 (T=2, SLG) Pan-head screw M2 8 (T=2) LED Holder LED (KR5004X) Nut M2 LED Holder (S1330M-01-10) Electrode Base (S1330M-01-01) Nut M2 LED (KR5004X) Fig

18 Page Refer to Fig Place LED into LED-Holder. 3. Place LED-Holder onto electrode unit. Apply by pushing LED-Holder from diagonally bottom to diagonally top. 4. Attach with Pan-head screw (M2 8, T=2) and nut (M2). Pushing Hanging Fig Install electrodes by applying light pressure to the back of electrode base (Refer to Fig ). 6. Attach with Phillips-head screw (M2 8, T=2) Pushing Fig

19 Page Z-Axis Unit Assembly Z-Axis Unit Assembly Z-Axis-Unit consists of two elements, Z-Clamp-Unit and Z-Motor-Unit Sheath Clamp Top 1. Refer to Fig Insert Super-Shaft (h7-1518) through Sheath-Clamp1 and Hinge2. 3. Insert Fiber-Pusher-Spring6 between Fiber-Pusher3and Sheath Clamp1. 4. Press Fiber-Pusher 3into Sheath Clamp 1, install Magnet-Catcher (Front)4 and Magnet-Catcher (Rear)5 with each two phillips-head screws (M2 4, T=3). Note Front and rear Magnet Catcher are not interchangeable. Insure that Fiber-Pusher3 moves smoothly after installation. Phillips-head screw M2 4 (T=3) Magnet-Catcher(Front)4 (S1330M-04-05) Hinge2 Magnet-Catcher(Rear)5 (S1330M-04-05) Fiber-Pusher3 (S1330R-24) Sheath Clamp Spring6 (S1330M-04-07) Sheath Clamp1 (S1330R-22) Super-Shaft h Fig

20 Page Fiber Clamp Arm Note - Fiber-Clamp-Arm, Right side illustrated. 1. Refer to Fig Insert Clamp-Arm- Shaft3 through Clamp-Arm (right)1 and Clamp-Arm-Bracket2. 3. Attach Clamp-Arm- Shaft3 to Clamp-Arm (right) with set screw (M2 2 with flat type T=1.5). Note - position axes pin chamfer to align with set screw (M2 2). 4. Make Clamp-Arm (right)1 parallel with base of Clamp-Arm-Bracket2 by adjusting set screw (M2 3 with flat type, SLG) (Refer to Fig ). Clamp-Arm (right) 1 (S1330R-26) Clamp-Arm(left) uses this-side hole. Set screw M2 2 with flat type (T=1.5, SLG) Clamp-Arm-shaft3 Clamp-Arm-Bracket 2 (S1330M-04-11) Set screw M2 3 with flat point (for adjustment of Clamp-Arm parallel, SLG) Fig Set parallel with set screw M2 3 Fig

21 Page Setting Clamp Top 1. Refer to Fig ~ Fig Loosely attach Sheath-Clamp-Top to Sheath-Clamp-Base Unit with cap screw (M2 6). 3. Insert gauge block (t=0.2) between Sheath- Clamp-Top and Sheath-Clamp-Base Unit. 4. Insert gauge block (t=0.25) between Sheath-Clamp-Top and Set plate A. 5. Push Clamp-Top forward and tighten cap screw (M2 6, T=3, SLG). Block gauge (t=0.2) Block gauge (t=0.25) Pushing Block gauge (t=0.25) Pushing to Hinge side Fig Block gauge (t=0.2) Fig Fig Refer to Fig Loosely attach Sheath-Clamp Arm Unit to Sheath-Clamp-Base Unit. 8. Apply pressure by pressing Sheath-Clamp forward and tighten cap screw (M2 6, WS2, SLG). Fig Pushing

22 Page Mechanical Adjustment 4.1. Installing Focus Unit Note XY-Block has been removed from Base Frame for illustration. To reduce the chance of damage to objective lens the Kyoutou installation would normally occur after the XY-block has already been installed into the Base Frame. 1. Refer to Fig Loosely attach Kyoutou to Focus-Arm with Cap screw (M3 8 or 10). Cap screw M3 8 Fig Apply force by pushing Focus Arms against Focus Arm Joint Plate from right and left (Refer to Fig ). While maintaining outside force on Focus Arms also apply force to top of Focus arm and bottom of Focus arm Joint Plate (Refer to Fig ). Tighten Cap screws (M3 10, WS3, T=12) using illustrated toque sequence. Pushing Pushing Fig No space Pushing Pushing No space Fig

23 Page Refer to Fig for steps 4 ~ Place Focus-Arm-Swing-Bearing into side holes (2 each) of Focus-arm. 5. Apply pressure by lightly pressing Focus-Arm-Swing-Bearing against XY-block. Note Chamfer of Focus-Arm-Bearing should align with set screw (M4 6). 6. Tighten set-screw (M4 6, T=15, flat type) located on Focus-arm. ***Attention*** Chamfer surface of Focus-Arm-Bearing Holder should only be used one time per side. Do not recycle Focus-Arm-Bearing Holders chamfer surface, they are designed to indent when the set screw is installed. Fix Kyoutou each side. Set screw M4 6 with flat type No space Pay attention to pushing surface. Direction of to insert set screw. Fig Refer to Fig Attach Focus Arms to Focus Arm Joint Plate with cap screw (M3 10, T=12, WS3) using illustrated torque sequence. No space Pushing 1 2 Pushing Fig

24 Page Place 1.5mm Block Gauge between Kyoutou Unit and Focus adjuster plate (Refer to Fig ). 9. Apply force by pushing top of Kyoutou Unit and bottom of Focus adjuster plate (Refer to Fig ). Block gauge (t=1.5) Fig Refer to Fig Attach Kyoutou Unit to Focus Arm adjuster with Cap screw (M3 10, T=12) using illustrated toque sequence. Pushing 1 2 Fig

25 Page Installing Z-Unit 1. Refer to Fig for steps 2~3. 2. Loosely Attached Z-Motor Unit to Base Frame with Cap screw M Apply pressure by pushing Z-Motor forward. Tighten Cap screw (M3 10, T=10, WS3, SLG). Fig Pushing 4. Refer to Fig Place Liner (t=0.7) between Z-Unit and Frame-Base. Note A small amount of Silicon-Grease may be applied to Liners to help maintain their position during installation. 5. Refer to Fig Apply pressure by Pushing Z-unit against Frame-Base center and back. 6. Tighten Cap screw (M3 10, T=10, WS3). Cap screw M3 10 (T=10,WS3) Liner(t=0.7) (S1330M-04-18) Fig Fig Pushing

26 Page Installing Tube Heater 1. Refer to Fig for steps 2 ~ Attach Fan to Frame-Base with Pan screw (M2.6 14, T=1, SLG). 3. Wind the wire of the fan around the shaft of the base frame twice and insert this wire into the hole. 4. Insert Heater unit wiring into the same hole as the fan wire. 5. Attach Heater Unit to Frame-Base with Cap screw (M2 14,T=4, WS2, SLG) 6. Connect heater to PCB terminal CN29. Phillips-head screw M (T=1, WS2.6, SLG) Cap screw M2 14 (T=4, WS2, SLG) Heater fan Base frame Wind the wire for fan around this pin twice. Pushing Pan-head screw M (T=1, WS2.6, SLG) Front side Fig Fig

27 Page Installing Wind Protector 1. Refer to Fig Attach Wind Protector and WP-Washer to Frame-Base with Cap screw (M2 4, T=3, SLG). Wind Protector shaft Cap screw M2 4 (T=3,SLG) WP-Washer Fig

28 Page Installing Power Unit Dock to Base-Frame 1. Refer to Fig Attach Power Unit Dock to Base-Frame with Cap screw (M3 6, T=7). 3. Attach the 2 GND wires with Cap screw (M3 6, T=10, WS3) Fix the 2 GND wire. Cap screw M3 6 (T=10, WS3) (S1330R-37) Cap screw M3 6 (T=7) Fig Warning! There is a Lithium coin battery on the main PCB. The battery surface is exposed with the positive terminal facing up. A short circuit of the coin battery can easily happen if; - A screw falls off between the battery and the post. - A shield plate edge on the PCB falls off between the battery and the post. - A free wire terminal contacts the battery. A short circuit may cause battery failure, calendar malfunction, or a damaged calendar IC. Be careful not to short circuit battery. A rubber cap is available from Fujikura that should be installed during any maintenance procedure. The rubber cap may be left permanently in place after repair. Post Coin Batter y

29 Page Adjusting the Set-Plate Position to the V-groove 1. Refer to Fig for steps 2 ~ Place special tool (φ2.0mm short electrode: STOOL4080) into the V-groove. 3. Adjust the set plate position by positioning the center of set plate slit to the tip of the electrode. 4. Apply pressure by lightly pushing set plate toward sheath clamp base. 5. Attach set plate with Cap screw (M2 6, WS2, T= temporary). 6. Remove only one screw and apply screw-locking-glue (Three-Bond) to the thread of the screw, apply pressure by lightly pushing set plate toward sheath clamp base. Tighten Cap screw (M2 6, T=1, WS2, SLG). Repeat process for second Cap screw. Note - Remove excess screw-locking-glue on the set plate. 7. Confirm the set plate position. Adjusting direction Pushing φ2 Pushing Arrange the center position Fix these screws one by one Fig Adjusting Z-Clamp Unit Height Note - Use shim (No. 40SM-4180). 1. Refer to section 4.2, steps 4 ~ 6 for shim installation. 2. Set the 250µm UV coating fiber into V-grooves. Note - Cleave length: 16mm 3. Refer to Fig Adjust the Z clamp height with shims so that 80% of the fiber is contacting the bottom of the V-groove. Note In Fig , sheath clamp would be located to the left of V- groove. Optical fiber Full attaching 80% attaching High Flat Low OK Fig

30 Page Adjustment Fiber Clamp Position 1. Refer to Fig for steps 2 ~ Adjust the Fiber Clamp by positioning the Fiber Clamp over the center of the V-groove. 3. Attach Fiber clamp with Cap screw (M2 6, T= temporary, WS2). 4. Remove only one screw and apply screw-locking-glue to the thread of the screw. Tighten Cap screw (M2 6, T=3, SLG). Repeat process for second Cap screw. 5. Confirm Fiber Clamp position. Fiber-Clamp Align the center of them. Put it temporary, after adjusting position. V-Groove Two cap screws (M2 6, T=3, WS2, SLG) Adjust the both sides. Fiber clamp arm bracket Fig

31 Page Adjusting Display Image Rough Adjusting Display Image 1. Adjust that display image looks like Fig (Refer to Section 4.9.3). Fiber position center line of X Electrode center line XL Camera Position XR X Y ZL YR YL Fiber position center line of Y 1. Fiber position Is almost center. 2. The edge of both X and Y axes fiber can see. Fig

32 Page Adjusting Camera Inclination 1. Refer to section (page 1 of 4), execute Camera Position command in [SECERT MENU]. 2. Refer to Fig Use left sheath clamp, set the 250um UV coating fiber into V-grooves. Note - Cleave length: 16mm 3. Drive fiber past electrode using the ZL motor manually. Note - Don t overrun ZL-Motor. ZL side Drive ahead manually. Move fiber farther than the center of Electrode-Base. Fig Refer to section to review Camera components. 5. Refer to section Refer to Fig Loosen set screw (M3 3, flat type) which attaches CCD-Camera Unit. Set screw (M3 10, T=2) Fig

33 Page Refer to Fig Rotate the X CCD-Camera Unit until the difference XL and XR is lees than 1 line. 9. Refer to Fig Tighten set screw (M3 3, T=2, flat type) which attaches X CCD-Camera Unit. 10. Use right sheath clamp, set the 250µm UV coating fiber into V-grooves. Note Cleave length: 16mm. 11. Drive fiber past electrode using the ZR motor manually. Note Don t overrun ZL-Motor. 12. Rotate the Y CCD-Camera Unit until the difference YL and YR is lees than 1 line. 13. Refer to Fig Tighten set screw (M3 3, T=2, flat type) which attaches Y CCD-Camera Unit. ZL motor moving XR ZR motor moving Camera Position Camera Position XL X Y ZL X Y ZR YL YR Fig

34 Page Image Alignment 1. Refer to Fig Install special tool (26mm electrode) into rear (anode side). Note - The tip should not to touch the fiber. 3. Refer to section 3.1.1,. Install special tool (cap screw and a spring No.1053) into center of Focus Adjuster. Gently rotate screw clockwise until it touches Kyoutou, then rotate the screw counterclockwise ½ turn. 4. Prepare and load two 250µm fibers into splicer. 5. Refer to section (page 1 of 4), execute Camera Position command in [Secret Menu]. Fig Refer to Fig Loosen vertical position Cap screws (M3 10, WS3). 8. Install 1.5mm block gauge between Kyoutou unit and Focus Adjuster. 9. Apply pressure by pressing Kyoutou unit onto Focus Adjuster. Tighten Cap screw (M3 10, T = temporary) 1 first and cap screw (M3 10, T = temporary) 2 second. 10. Check X-axis and Y-axis positions. Specification X=280 ± 10 line, Y=200 ± 10 line. Note Target X=285, Y= If out of specification, adjust Block Gauge thickness. Repeat steps 9 ~ 10 until the specification is achieved. 12. Tighten Cap screw (M3 10, T=12) 1 first and Cap screw (M3 10, T=12) 2 second. 13. Refer to Fig for steps 14 ~ Switch fiber view to X large view by pressing [X/Y] key. 15. Enable focus X motor. Adjust the white band to one-third of fiber diameter. 16. Switch fiber view to Y large view by pressing [X/Y] key. 17. Enable focus Y motor. Adjust the white band to one-third of fiber diameter. 18. Loosen horizontal position Cap screws (M3 10, WS3) 19. Electrode cursor should be set at line Adjust right side fiber end-face in the Y view by moving the Focus-Adjuster. Tighten cap screw (M3 10, T=12) 1 first and Cap screw (M3 10, T=12) 2 second. Specification Y=376 ± 10 line. Note Target= line

35 Page Adjust right side fiber end-face in the X view by moving the Focus-Adjuster. Tighten Cap screw (M3 10, T=12) 1 first and Cap screw (M3x10, T=12) 2 second. Specification (Y-X) ± 10 line. Note Target = (Y-X) = 0 ~10 line. Block gauge Vertical position screws Fig Focus-Adjuster A B Horisontal position screws Fig Recheck fiber vertical position in Y view. 23. Recheck gap center position in Y view. 24. Recheck gap center position in X view. 25. Recheck fiber vertical position in X view. 26. Remove all special tools and Block Gauges.

36 Page Wind Protector Mirror Adjustment 1. Refer to Fig Adjust Wind protector angle by turning set screw B (M2 3). 3. Refer to Fig Using Focus motor, adjust fiber image (both X and Y-axis) so that the outside black bands are equal in width. 4. After adjustment, install Set screw A (M2 2, SLG) Wind-Protector-Cover (S1330M-01-14) Setting screw A M2 2 (SLG) Setting screw B M2 3 Wind-Protector (S1330R-02) Wind-Protector-Mirror (S1330R-03) Plate Super-Shaft h Spring No.1043 Magnet Wind-Protector-Shaft (S1330M-01-11) Cap screw M2 4 (T=3, SLG) Fig Cap screw M2 6 (T=3,WF2) X READY Make about same width. Fig

37 Page Adjustment of XY Unit Confirmation of XY adjustment condition 1. Refer to section Confirm the CCD camera inclination. 2. Refer to Fig Confirm the parallel position of X and Y axes. 3. Execute Camera Position command in [Secret Menu]. 4. Manually align X and Y axes motors until the difference between left and right fiber position is less than ±1.5 line. XL Camera Position XR X Y ZL YR YL (XL-XR) <= ±1.5 line (YL-YR) <= ±1.5 line Fig

38 Page Use left sheath clamp, set the 250µm UV coating fiber into V-grooves. Note Cleave length: 16mm. 6. Drive fiber past electrode using the ZL motor manually. Note Don t overrun ZL-Motor. 7. Record values (ZL-XL), (ZL-XR), (ZL-YL), (ZL-YR). Refer to Fig Use right sheath clamp, set the 250µm UV coating fiber into V-grooves. Note Cleave length: 16mm. 9. Drive fiber past electrode using the ZR motor manually. Note Don t overrun ZR-Motor. 10. Record values (ZR-XL), (ZR-XR), (ZR-YL), (ZR-YR). Refer to Fig ZL-XL ZL motor moving ZL-XR ZR-XL ZR motor moving ZR-XR Camera Position Camera Position X Y ZL X Y ZR ZL-YL ZL-YR ZR-YL You calculate shown below. 1) A = (ZL-XL) (ZL-XR) on ZL fiber 2) B = (ZL-YL) (ZL-YR) on ZL fiber 3) C = (ZR-XL) (ZR-XR) on ZR fiber 4) D = (ZR-YL) (ZR-YR) on ZR fiber Fig ZR-YR 11. Calculate A, B, C and D from formula in Fig Confirm the difference (A-C) and (B-D) are less than 1.5 line. ZL ZR Difference Standard X A C (A-C) (A-C)<= 1.5 line Y B D (B-D) (B-D)<= 1.5line

39 Page Confirmation of Swing-arm Travel 1. Prepare and load two 250µm fibers into splicer. 2. Refer to Fig Execute Camera Position command in [Secret Menu] and push SET key. Note: X and Y motors automatically move to there outer limits at which time they are measured. 3. Record the U and D values in both axes. 4. Specification for X or Y movable range: both U and D values > 30 µm. Camera Position X Y Camera Position U: 42.8 D: X Y U: 38.5 D: U: Top limit distance [µm] D: Bottom limit distance [µm] Fig

40 Page Adjustment of Focus Motor LS-dog s Position 1. Prepare 250µm fiber with 30mm strip section and load into both V-grooves. 2. Refer to Secret Menu, execute Focus & Electrode command in [Secret Menu]. 3. Refer to Fig for steps 4 ~ Pushing SET key, automatically adjust focal point to produce sharp fiber core image. 5. Focus Motor movable range Specification is > ¾ rotation ether clockwise or counterclockwise from sharp fiber core image focal point. 6. If out of specification adjust gap (standard - 1.5mm block gauge = A ) between Motor-gear and LS-dog. Attach with set screw (M3 3, T=2, flat type). Focus & Electrode X Auto focusing Set screw M3 3 with flat type (T=2) Turn in the front. More than 3/4 rotation 376 A More than 3/4 rotation Fig After adjusting of the Sensor-dog, Execute the Focus Home Adjustment command in [Secret Menu].

41 Page Adjustment of Focus-Mechanical-Stopper s Position 1. Prepare 250µm fiber with 30mm strip section and load into both V-grooves. 2. Using Focus Motor, manually adjust focal point to produce sharp fiber core image. 3. Refer to Fig Measure gap g from Focus-Arm-A to Focus-Arm-B. Note Measure with Block Gauges. 5. Calculate Block Gauge thickness. Formula - (Block Gauge thickness = g -1mm). 6. Loosen the set-screw (M4 6) for Focus-Arm-Stopper. 7. Place Block Gauge between Focus-Arm-A and Focus-Arm-B, apply pressure by pressing Focus- Arm-B against Focus-Arm-A. 8. Apply pressure by pushing Focus-Mechanical-Stopper up. Attach set-screw (M4 6, T=10, W point type, SLG) to Focus- mechanical-stopper. Measure the gap "g" from Focus-Arm-A to Focus-Arm-B. Focus-Arm-A Focus-Arm-B Insert "t" milimaters thick gauge between Focus-Arm-A and Focus-Arm-B. And press Focus-Arm-B against this gauge. Focus-Arm-A Fix the state of pressing Focus-Stopper against Focus-Arm-A. Focus-Arm-B SetScrew M4 6 with W point (T=10, SLG) Focus-mechanical -Stopper Fig Note - New XY-block has the rubber bushing to resist shock created by stopper pin impact. In this case, change the block gauge thickness (g-0.8) mm.

42 Page Confirmation of Z Motor End Play 1. Refer to Fig Press [RESET] key. 3. Prepare and load fiber. Position end-face of fiber very close to electrode. Fiber should appear on monitor when the wind protector is closed. Monitor Display Camera Position X Y Fig Refer to Fig While observing fiber image on monitor move Z-Motor forward by pressing key pad command. 6. Fiber on monitor should move forward before Z-motor Micrometer Gear rotate ½ turn. 7. If out of specification, refer to Fig to adjust gap between Carbide plate and Micrometer. Carbide plate Set screw M3 3 with flat type (T=2) Marking Half rotation 0.1~ 0.4mm 3.2mm(Standard) Fig

43 Page Install the Discharge Circuit 1. Connect discharge circuit wiring to PCB connector CN Refer to section 3.2. Insert the discharge wires (anode and cathode) into the space between the Mechanical base and the Base frame. 3. Refer to Fig Insert the discharge wires into the electrode holders and tighten set screw (M2 2, T=1.5). 4. Attach discharge circuit to left side of Frame-Base with cap screw (M3 6, T=5, WS3, SLG). Set screw M2 2, T=1.5 Insert the discharge wire into the holes Fig

44 Page Installing Monitor 1. Refer to Fig Attach the LCD monitor to the monitor frame with countersink screws (M3 6, T=6). Note Route monitor cable through hook for monitor code. 2. Monitor cable length from Monitor Bracket to end of Monitor connector (J14) should be 90mm. Confirm this length. Countersink screw M3 6 (T=6) Monitor Frame Hook for Monitor Cord LCD Monitor (Back view) 90mm Monitor Cord Pan-head screw M3 4 (T=6) Fig Refer to Fig Attach Monitor-Unit to Base Frame with Pan-head screw M3 14 (T=10, WF3 outside diameter φ8, SLG). Pan-head screw M3 14 (T=10, WF3-diameter φ8, SLG) (S1330R-28 Fig

45 Page Installing Connector Box 1. Refer to Fig , Fig Attach the Connector Box to Base Frame with Countersink screw (M2 6, T=3). Note The CCD and Monitor cables should pass through the connector box hook the two FPCs of the keypad as Illustrated. Right side - back view Top view FPC of Key Pad Pillar Hook2 (2) Insert Monitor cable in Hook2. Hook2 Hook1 (1) Insert CCD camera cable (Y) in Hook2. Video out CCD (Y) (4) Attach the Connector box to Base frame. CCD (X) (6) Insert ZR cable in Hook3. Connector Box C-Box (3) Set CCD camera cable (X) and Connector box cables in front of Hook 1. ZR Hook3 (5) Insert CCD camera cable (X) in Hook3. Note: The monitor cord should go through the hook of connector box. Note: The CCD camera cord should go through the hook of connector panel with monitor cable. Fig Countersink screw M2 6 (T=3, steel) (S1330R-36) Fig

46 Page Installing Panel Set Front Cover and Rear Cover to Base Frame with Pan-head screw (M3 6, T=7). Set Camera Cover to Rear Cover with Pan-head screw (M3 6, T=7). Pan-head screw M3 6 (T=7) for Camera Cover (S1330M-07-08) Pan-head screw M3 6 (T=7) (S1330M-07-07) Fig Note: There is no need to remove the screw that attaches the Camera Cover.

47 Page Tube Heater Adjustment Adjust Tube Heater Temperature 1. Prepare the temperature sensor for the heater adjustment. Method 1 - Thermo spot sensor (non-touch sensor). Refer to Fig and Fig Set the thermo spot sensor on the splicer. Thermo spot sensor * Tool for fixing the thermo spot sensor. Note: This unit can only use for 40S. Splicer Thermo spot sensor * (display part) Set the tool for fixing the thermo spot sensor on the corner Fig Base frame The tool for fixing the thermo spot sensor Push Push the tool for fixing the thermo spot sensor on the corner Push Fig

48 Page 48 Set the infrared ray by the spot sensor on the center of the radiator Fig Note1: Sensor type is as follows: Japan Sensor Co. Ltd. Thermo Spot Sensor TMZ E3-2 Note2: You must set the radiation ratio value before the heater adjustment as follow. 1. Push the MODE key and Left key at once. 2. Push the Up or Down key to change the far right variable. 3. Push the Left key to shift the cursor left. Press Up or Down to change the value of that variable. 4. Set the radiation ratio value at 0.930, push the ENT key. 5. Push the MENU key 6 more times to complete the operation. Note3: The tool for fixing the thermo spot sensor can be constant 50mm distance between the sensor and the radiator plate. This distance is this thermo spot sensor specification. Note4: Use thermo sensor only on the new type tube heater (e.g.fsm-16r and 30R). Method 2 - Thermo couple sensor. Fig illustrates how to use thermo couple sensor on the heat emission plate. Thermocouple Center of radiator plate Radiator plate Heat Sinker (Shin-etsu Chemical Co. Ltd. Oil Compound KS-609 Fig

49 Page Refer to section Execute Heater Adjustment in [Secret Menu] Page 3 of 5. WARNING - Refer to Fig Immediately Push the Down key after pressing ENT key in step 4, and set the [A/D 250] to 80 bit. Failure to do so will result in tube heater damaged due to overheating. Note: Initialized [A/D 250] value is set at 36 bit with program or earlier version. Adjust Temparature 250 deg A/D 250 deg = 80 bit Fig

50 Page Wait 1 minute. 4. Refer to Fig Adjust A/D bit value up or down while checking temperature sensor output. Adjustment should be complete in less than 30 seconds. Specification = maximum heat temperature 248 ~ 250ºC. 5. Press ENT key. Heat Temp erature Max. temperature is between 248 and 250ºC. Adjusting point for cool finish temperature must be between 100 and 105ºC. Note: It is only one chance to check it. When the temperature is out of specification, a re-adjustment for AD100 is required. And, execute the program from the first step. 60 seconds 30 sec. Heat Time Heat temp. adjustment must be done in this period. Fig Refer to Fig Adjust 100ºC A/D bit value up or down while checking temperature sensor output. Specification = temperature 100 ~ 105ºC. Note Reading for adjustment should be taken during the first decline from the high temperature point (refer to Fig ). Note A/D must be > 50 bit after adjustment. If not, refer to section 7.13 Heater Trouble to repair. Wait 59 sec. Adjust Temparature 250 deg A/D 250 deg = 80 bit Adjust Temparature 100 deg A/D 100 deg = 220 bit Fig

51 Page Splice Test Estimate Check 1. Enter the Main Menu. 2. Set the splice mode to Standard SM Auto. 3. Prepare and load two 250µm SM fibers into splicer. 4. Refer to section Execute the Estimate Test in Secret Menu. 5. Refer to Fig The left fiber moves forward and the estimation loss is calculated automatically. Estimation Specification: <= 0.02dB. 6. To re-estimate, push the ENT key. Estimate Test BGB= LED = X Y ECC-X: Y: XY: LOSS=0.00dB CORE CLAD X: Y: OF: CS:0.012 X:C Y:C MF: :SM Fig :60mm

52 Page Stuff Check 1. Prepare and load two 250µm SM fibers into splicer. 2. Refer to section Execute Stuff Check in the [Secret Menu] 3. The result of stuff check is displayed on the monitor. Specification: 30±5 µm. 4. If this value is no good, adjust the stuff speed by pushing Up or Down cursor key. 5. Repeat steps 1 ~ Arc Calibration 1. Refer to the instruction manual. 2. Execute Arc Calibration mode in the main menu. 3. If Test again appears on the monitor after executing arc calibration mode, repeat until Test again message does not appear. 4. If Arc Calibration is attempted 10 times with poor results. Execute Replace Electrode mode without changing the electrodes. 5. Repeat Arc Calibration.

53 5. Electrical 5.1. PCB Connection Page 53

54 Page How to: 6.1. Replace PCB Preparations before Replacement 1. Refer to section Select Config Code in [secret menu]. 2. Record Config Code codes (3 each). Each code has 15 characters. Characters used for the configuration codes are ABCDEFGHIJKLMNOPQRSTUVWXYZ and Turn the splicer power off and remove Power Supply Removal of PCB 1. Refer to section 5. Remove all connectors from Main PCB. Note Remove screw that holds black cathode cable to Frame-Base. 2. Refer to section 4.6. Remove Power Unit Dock from Frame-Base 3. Refer to Fig Remove corner screws from shield board. 4. Refer to Fig Remove 2 screws and 4 posts from main PCB. Shield board Release 4 posts Release 4 screws Release 2 screws Fig Fig Refer to Fig Detach power supply cord from main PCB. Connectors of power supply are reverse side of PCB. Left side view of PCB Anode: Red Cathode: Black Fig

55 Page Installation of PCB 6. Refer to Fig , Fig Attach New PCB in reversed order of replacement procedure steps 1 ~5. Note - Confirm that cables and connectors are not pinched between the post and screw. This may be view through the peephole as illustrated. Left side view of PCB Battery Frame Peephole of wiring corfirm Fig Cap screw (M3 6, T=5) Main P.C.B. Shield Plate Spacer (M3, WS3, SLG) SLG paints only screw head. Cap screw (M3 6, WS3, SLG) SLG paints only screw head. Fig Install Program software. 8. Turn splicer ON, Initializing... Please wait message is displayed on the monitor, All parameters are cleared. 9. Refer to section Select Config Code Input in [secret menu]. 10. Input configuration codes recorded in Step 2 of section Note - If you enter an incorrect code it will be displayed in a RED color. 11. Refer to section Adjust voltage indicator. 12. Refer to section Adjust tube heater temperature.

56 Page Adjusting Voltage Indicator for 40S To operate the battery indicator correctly, it is necessary to adjust the sensor value of splicer. Components Required for Testing Ohmmeter Fully Charge ADC-07 AC Adapter Procedure 1. Confirm software version is > Measure voltage of ADC-07 with ohmmeter and record measured voltage. 3. Insert ADC-07 AC adapter into the power unit dock until it clicks into place. 4. Refer to Turn on the splicer and select the Voltage Adjustment in the [Secret Menu] 5. Refer to Fig Adjust Input Voltage to match recorded measured voltage by pressing < > or < > key and input output AC voltage 6. Press <ENT> key. Fig Note: The splicer automatically adjusts the value of voltage sensor. Adjusted value appears on the screen.

57 Page Software Upgrade Software Upgrade with Programming Chip Device Components Required for Upgrade New version ROM ROM Download PCB ROM Download PCB extension cable Procedure 1. Turn the splicer power off. Disconnect the power source from the splicer. 2. Refer to section Remove cover panels. 3. Connect the ROM Download Extension Cable between CPU Board and ROM Download PCB. 4. Install the New ROM into the Download PCB. Caution: Install ROM correctly. 5. Connect power source to splicer. 6. Push the ON key. The ROM download Menu will appear. 7. Select OK. Download is initiated. Wait until download is completed. 8. Confirm the software version by power on menu or Maintenance Information. Fig

58 Page Software Upgrade with RS-232C cable Install of PCUG software Before using PCUG, install as follows: 1) Click SETUP.EXE 2) Select folder to install. Default is C: Program Files SY012 ROM Upgrade. Do not change the folder, except for special reason. 3) Click Computer Mark ICON. 4) Automatically installed. 5) After install, making Short Cut of PCUG to the desktop of PC is convenience in the case of upgrading. <NOTICE> PCUG software can be executed Windows 95/ Upgrading of software. 1) Close all windows applications. Other applications (especially, applilications) has possibility to prevent communication between splicer and PC. Just in case, turn the screen saver of PC to OFF. 2) Connect splicer to PC using RS232C cross cable. Please refer to section ) PCUG program (SY012 Upgrade) start from Windows Start Menu. Icon of windows menu is blue circle. 4) Select COM port COM1 or COM2. 5) Select ROM data file. 6) ROM data file extract automatically. Please wait 1 or 2 minutes. Wait time is decided by the performance of PC. 7) Confirm the Model Name and ROM Version shown in the right side of the window. For example, Model Name is FSM-40S, Version Name is ) Confirm that splicer power is off or not. If power is on, turn the power off and click OK. 9) Turn the splicer power on. Then 4 buttons are shown, and select baud rate for the first time. Baud rate of splicer is automatically set. If buttons are not shown, confirm the connection between PC and splicer and try again. 10) Confirm the previous software version, and click OK. 11) Wait until upgrading. Wait time is about 5 minutes. (In the case of bps.) 10 minutes. (In the case of bps.) 13 minutes. (In the case of bps.) 20 minutes. (In the case of 9600 bps.) 12) If upgrade failure, error message is shown on the window. In this case, try again and select lower baud rate at the step 7. Some devices installed to PC have the possibility of preventing the communications between PC and splicer. 13) After finishing upgrade, confirm the value of check sum shown on the right down corner of window. The value of check sum is announced by KOKAI-M with the file of Software Version History of FSM-40S. 14) In the case of upgrading other splicer, click Y. On the other hand, in the case of finishing, click N.