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Toshiba 1550, Service Handbook

The Toshiba 1550 Service Manual is a comprehensive guide for users looking to troubleshoot and repair their Toshiba 1550 device. This manual provides step-by-step instructions and detailed diagrams, ensuring that users can easily understand and fix any issues. Download it for free from manualshive.com and become a pro at maintaining your Toshiba 1550.

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1550  ADJUSTMENT

Oct. 1995  ©  TOSHIBA CORP.

1.2.1

Input check (Test mode 03/04)

In the 03 or 04 test mode, you can check the status of each of the following input signals by pressing

the corresponding keys.

Input

value

EXP1

EXP2

EXP3

EXP4

EXP5

EXP6

EXP7

EXP8

PFU cover

switch

(open)

Developer

unit switch

(none)

Main motor

PLL

(NG)

—

—

—

—

—

—

1

CTR-CNT

(No CTR)

HTR-RDY

(Not ready)

—

2

—

—

—

—

3

S-CNT

(No sorter)

MRR-HOM

(Home

position)

LNS-HOM

(Home

position)

CRG-HOM

(Home

position)

DF-CNT

(No DF)

TNR-FUL

(Normal)

EXIT-SW

(Paper

present)

EMP-SW

(No paper)

SIZ13

(OFF)

SIZ12

(OFF)

SIZ11

(OFF)

SIZ10

(OFF)

FED-SW

(Paper

present)

EMP-SW2

(No paper)

CST2

(No cassette)

RGT-SW

(Paper

present)

Bin-home

sensor

(ON)

One-rotation

sensor

(ON)

Paper-on-tray

sensor

(ON)

Entrance

sensor

(ON)

Limit

sensor

(ON)

Removal

sensor

(ON)

Empty sensor

(ON)

Open sensor

(ON)

Exit sensor

(ON)

Aligning

sensor

(ON)

Paper width

sensor 1

(ON)

SIZ00

(OFF)

SIZ01

(OFF)

SIZ02

(OFF)

SIZ03

(OFF)

—

—

—

—

—

—

—

—

4

5

6

7

*

( ) means that LEDs come on.

0

3

Power

PRINT

Nemeric keys

LED ON

0

9

<Procedure>

DARK

LIGHT

AUTO

Paper width

sensor 2

(ON)

Summary of Contents for 1550

Page 1: ... Bookmarks and Page button to open the Contents and ookmarks created for the document Click a bookmark s name he Page marked by that bookmark Thumbnails and Page button to open the overview area and umbnail images of each document page Click a thumbnail to page marked by that thumbnail ht TOSHIBA CORPORATION 1995 HTS RESERVED ...

Page 2: ...umidity dust vibration and direct sunlight To insure adequate working space for the copying operation keep a minimum clearance of 80 cm 31 5 on the left 80 cm 31 5 on the right and 10 cm 3 9 in the rear 3 Service of Machines Basically be sure to turn the main switch off and unplug the power cord during service Be sure not to touch high temperature sections such as the exposure lamp the fuser unit ...

Page 3: ...he copier during servicing 6 Disposition of Consumable Parts Packing Materials Regarding the recovery and disposal of the copier consumable parts and packing materials it is recommended to follow the relevant local regulations or rules 7 When parts are disassembled reassembly is basically the reverse of disassembly unless otherwise noted in this manual or other related documents Be careful not to ...

Page 4: ... Bypass feeding LED comes ON E02 Paper misfeeding in the neighborhood of the fuser E03 Paper misfeeding inside the copier when the power is turned on E05 Non arrival at aligning switch misfeed After the paper fed from PFU has passed ing the transport roller or fed from PPC Error code Content Remarks E14 Lower cassette paper misfeeding PFU Paper does not arrive at the transport roller 3 Paper misfe...

Page 5: ...or E82 Paper staying jam in the sorter Paper stays at the entrance sensor transport path 5 Service call for the copier s drive system Error code Content Remarks C01 Abnormal operation of the main motor 6 Service call for the optical system 7 Service call for the process system Error code Content Remarks C32 Easy setup UA mode error 8 Fuser unit related Error code Content Remarks C41 Abnormal therm...

Page 6: ...tialization ADF jam LED is flashed 11 Sorter related service call Error code Content Remarks C81 Abnormal paper transport motor C82 Abnormal bin moving motor C83 Upper limit error C84 Lower limit error C85 Home sensor error C88 Copy removal sensor error 12 Service call for other abnormalities Error code Content Remarks C94 Faulty optical system initialization in The content is similar to C21 error...

Page 7: ...ode Forces the copier to become ready Indication AG CH CH AJ 0 7 Aging mode Aging with ADF 09 AG System changing and setting defaults and PM counter 0 8 Setting mode 09 AD Note How to access each mode While pressing the two keys for the mode to access ex 0 and 5 for the adjustment mode turn on the main power switch Procedure All control panel LEDs ON mode 01 0 1 Power All control panel LEDs come o...

Page 8: ...when checking paper feeding operation Setting mode 08 For this mode refer to Setting Mode on page 1 12 Self diagnostic mode progress diagram 06 P 01 02 07 05 C 03 04 05 08 09 09 09 C Power ON Warming up All control panel LEDs ON Aging Test mode Adjustment mode Setting mode Stand by Temporary stop P Press PRINT C Press CLEAR STOP ...

Page 9: ...n LNS HOM Home position CRG HOM Home position DF CNT No DF TNR FUL Normal EXIT SW Paper present EMP SW No paper SIZ13 OFF SIZ12 OFF SIZ11 OFF SIZ10 OFF FED SW Paper present EMP SW2 No paper CST2 No cassette RGT SW Paper present Bin home sensor ON One rotation sensor ON Paper on tray sensor ON Entrance sensor ON Limit sensor ON Removal sensor ON Empty sensor ON Open sensor ON Exit sensor ON Alignin...

Page 10: ...oves to 50 position and to 200 position at 2nd press 1 30 HVT M 31 HVT TR 32 HVT AC 33 Exposure lamp If forced on for 5 sec it goes off 64444474444448 64444474444448 ON OFF 61 PFU motor PFU 62 Pick up roller clutch PFU 63 Feed roller clutch PFU 64 Aligning roller clutch PFU 80 DF independent aging At 1st P key press starts and stops at 2nd press 71 PFU motor PFU 72 Pick up roller clutch PFU 73 Fee...

Page 11: ...4 Code Print Print 09 Warm up Operation ON Power supply Stop code Oparation OFF Group 2 C S Test mode standby state Warm up 09 03 04 Code Print Operation one direction Power supply Group 3 Operation ON C S Test mode standby state Warm up 09 03 04 Code Print Print Power supply ...

Page 12: ...xposure 50 0 255 128 The larger the lighter 8 Auto exposure 200 0 255 128 The larger the lighter 9 Exposure light Inclination 0 255 255 The larger the lighter at the light side 10 Exposure dark Inclination 0 255 0 The larger the lighter at the dark side 14 Photo exposure 100 0 255 128 The larger the lighter 15 Photo exposure 154 0 255 128 The larger the lighter 16 Photo exposure 50 0 255 128 The l...

Page 13: ...Aligning value copier 0 31 8 83 Aligning value B5 0 31 16 84 ADF aligning amount 0 15 8 87 ADF original to original gap 0 15 8 2 in 1 mode 89 Aligning value middle size 0 31 16 90 Auto toner adjustment 0 255 128 97 ADF EEPROM initialization 98 ADF aligning sensor automatic adjustment Each increase by 1 causes the erased position by LED to shift 1mm toward the trailing edge with paper surface as re...

Page 14: ...py Clear 2 0 Automatic auto toner adjustment Clear 0 9 0 5 Power PRINT INTERRUPT Memorize 3 0 5 Power 49 PRINT Automatic auto exposure adjustment Possible only after the automatic adjustment is completed 0 9 Clear Power 0 5 97 98 PRINT Clear Ends 2 sec later 0 9 ADF EEROM initialization ADF Aligning roller automatic adjustment 4 ...

Page 15: ... 15 sec 10 Timer mode auto reset 0 10 3 45 sec 2 30sec 3 45 sec 4 60 sec N N x15 sec 0 None 1 30 sec 2 60 sec 3 90 sec 4 120 sec 5 150 sec 11 Auto power saving 0 15 0 6 3 min 7 4 min 8 5 min 9 7 min 10 10 min 11 15 min 12 20 min 13 30 min 14 45 min 15 60 min 0 Max 999 copies 12 Maximum number of copies 0 3 0 1 Max 99 2 Max 9 3 Max 500 13 Paper feeding retry 0 1 0 0 Retry 1 No retry 14 Cassette pri...

Page 16: ... 38 Heater temperature during power saving 0 7 0 4 150 C 5 160 C 6 170 C 7 180 C 44 All clearing after copying 0 1 0 0 None 1 Available 51 Easy set up method UA mode 0 1 0 0 No 1 Yes 52 Quick copy mode 0 1 0 EUR 0 None 1 Available 1 UC 53 Broken exposure lamp detection 0 2 0 0 All exposure modes 1 Auto only 2 None 54 Coin vender mode 0 1 0 0 None 1 Available 58 Reproduction ratio display time 0 15...

Page 17: ...up 5 C44 6 After the finish of 7 warming up Absent normal 0 When the power is the turned on if an abnormality occurs the C41 CALL SERVICE symbol will flash and the value of the setting mode code 89 will be counted up When the Code 89 value is 0 1 rewarming up is performed by turning on the machine again If the value is 2 or more CALL SERVICE symbol will flash immediately If an abnormality occurs d...

Page 18: ... screws 2 Using the wire holder jig wrap the wire on the take up pulley 3 1 4 turns of the fixture side end and 5 1 4 turns of the other end Wire take up pulley Spherical terminal Wire take up pulley Wire holder jig Front side closely fit Rear side Hook feed side Hook feed side Front side wire fixture Marking F Shaft closely fit closely fit closely fit 5 turns 1 4 3 turns 1 4 5 turns 1 4 3 turns 1...

Page 19: ...he rear 1 3 B Adjusting the Carriage Wire Tension After having removed the wire adjust the tension of the wire with the adjustment screw so that the exit side leaf spring will be deflected as shown in the drawing below Also always adjust the positions of the carriage 1 and 2 after finishing the tension adjustment Deflect it by 2 mm Before After Adjustment screw Wire tension bracket Carriage drive ...

Page 20: ...ge 2 tighten the screws on the front and rear Note Move carriages 1 and 2 to the exit side by rotating the shaft and check to make sure that the claws of both carriages two for each touch the inside surface of the frame at the same time 1 4 Position Adjustment of Carriage 1 and 2 1 While pushing carriage 2 to exit side tighten the screw on the front Carriage 2 Exit side Carriage 1 Exit side ...

Page 21: ...ker evenly As a result of the above adjustment there is a possibility that under exposure or over exposure may occur make exposure adjustment if necessary 3 Move light distribution adjustment plates 1 and 2 in the direction of the arrow When the rear side is darker 4 Move light distribution adjustment plates 2 and 3 in the direction of the arrow When the front side is darker Light distribution adj...

Page 22: ...ed cor rectly with the original scale if the copy image is slanting adjustment should be made by moving the front side of the original scale Slanting as in A Adjust the original scale in the direction of the ar row A Slanting as in B Adjust the original scale in the direction of the ar row A Direction of movement Direction of movement Original scale B A Paper Image ...

Page 23: ...ment using the following procedure Step 1 If the image is distorted as in A or B make adjustment in the direction of copy movement using the mirror 2 s adjustment screw to make the image as in C or D In the case of A Rotate the adjustment screw in the direction of tightening clockwise In the case of B Rotate the adjustment screw in the direction of loosening counter clockwise Mirror 2 C D A B A B ...

Page 24: ...nit s adjustment screw make adjust ment in the direction perpen dicular to that of copy move ment to make the image nor mal In the case of C Rotate the adjustment screw in the direction of tightening clockwise In the case of D Rotate the adjustment screw in the direction of loosening counter clockwise July 1996 ...

Page 25: ... Focus lateral reproduc tion ratio adjustment Original scale 60 65 Note Do adjustment steps in the dotted line boxes as required Lens unit Focus lateral reproduction ratio adjustment AJ Codes 60 65 When the lens is replaced or when the focus or the lateral reproduction ratio is not correct the following adjustment data need to be re entered Lens position value 200 63 Lens position value Normally a...

Page 26: ...f the image has more margin than that of any of the four corners of the image due to the characteristics of the lens 5 For 200 and 50 reproduction ratios adjustment of the normal focus mirror position makes the lateral reproduction ratio optimal making it unnecessary to be adjusted B 200 focus and lateral reproduction ratio adjustment 1 Make a 200 copy and check for the correct focus and lateral r...

Page 27: ...user follow procedure 4 1 Adjustment of 100 manual exposure Sequence Operation Display after operation typical 1 1 Input code 1 using the digital keys and press the Print key 120 1 2 When density is high Note 1 Increase the numerical value using the Zoom key Note 2 129 Zone A When density is low Reduce the numerical value using the Zoom key Note 2 180 1 3 Press the Interrupt key and enter the nume...

Page 28: ...cribed later 4 Avoid opening the original cover pressing keys on the control panel or turning the power OFF during automatic adjustment When changing the variable width of the key for manual exposure in accordance with the user s request carry out 3 and 4 described below 3 Changing the amount of variation in the light image density Sequence Operation 3 1 Input code 9 using the digital keys and pre...

Page 29: ...he memory Press the Energy saver key and make a test copy If the image density of the test copy is not satisfactory repeat operations 5 1 through 5 4 128 138 118 1442443 AJ 4 Adjust exposure in accordance with the procedures shown in the charts below if requested by the user for separate adjustment of manual auto exposure Adjustment Exposure mode Reproduction Adjustment code sequence ratio 1 100 1...

Page 30: ...e digital keys and press the Print key When density is high Increase the numerical value using the Zoom key When density is low Decrease the numerical value using the Zoom key Press the Interrupt key and store the numerical value in the memory Press the Energy saver key and make a test copy If the image density of the test copy is not satisfactory repeat operations 3 1 through 3 4 103 109 096 14 4...

Page 31: ...t key When density is high Increase the numerical value using the Zoom key When density is low Decrease the numerical value using the Zoom key Press the Interrupt key and store the numerical value in the memory Press the Energy saver key and make a test copy If the image density of the test copy is not satisfactory repeat operations 6 1 through 6 4 127 139 113 AJ 7 50 automatic exposure adjustment...

Page 32: ...41 149 133 AJ 14 4 424 4 43 Sequence Operation Display after operation typical 11 1 11 2 11 3 11 4 11 5 Input code 15 using the digital keys and press the Print key When density is high Increase the numerical value using the Zoom key When density is low Decrease the numerical value using the Zoom key Press the Interrupt key and store the numerical value in the memory Press the Energy saver key and...

Page 33: ...d press the Print key When density is high Increase the numerical value using the Zoom key When density is low Decrease the numerical value using the Zoom key Press the Interrupt key and store the numerical value in the memory Press the Energy saver key and make a test copy If the image density of the test copy is not satisfactory repeat operations 13 1 through 13 4 128 138 118 AJ 14 4 424 4 43 ...

Page 34: ... 1 Take out the process unit and then remove the developer unit main charger unit and drum 2 Remove the main blade 3 Using the drum shaft install the adjustment jig in the cleaner unit and then set the main charger unit Jig Earth wire 3P connector For measuring the transfer separation values 4 Set the process unit into the copier and fas ten the earth wire of the jig to the machine frame with a sc...

Page 35: ...rger plate spring with the terminal Frame earth For measuring the grid bias 7 Setting of digital tester In the case of grid bias Set at 1000 VDC range In the case of transfer Set at 2 VDC range In the case of separation Set at 2 VAC range 8 9 0 5 Power AJ 10 Check voltage value using digital tester Grid bias 692 5 V Black Transfer 586 20mV Separation AC514 21mV effective value displayed AC464 18mV...

Page 36: ...the separation output When deficiency in separation from the drum occurs or the user uses thin paper frequently in crease the separation output Be careful to avoid over increasing or over decreasing separation output Zoom Interruption AJ Adjust voltage value Memory 11 When adjustment is required ...

Page 37: ...tal tester to 1000 VDC range 3 4 5 Check voltage value using digital tester DC200 V 5 V OUT 5 Frame earth VR81 0 5 Power AJ 4 0 Print 128 C S Output stop AJ 6 If adjustment is required perform adjustment through VR81 Bias Do not touch the zoom keys and the digital keys 7 Note If an overall misty effect is observed even though exposure is sufficient increase bias output through VR81 Bias However wh...

Page 38: ...crew of the adjuster plate move and adjust it using the adjust ment mark as a guide Note however that since the pole position was adjusted using a special jig at the factory it should be adjusted only when necessary When its fixing screw needs to be loosened for reasons of disas sembly etc the initial position of the adjuster plate should be remembered or marked for later reassembly However whenev...

Page 39: ... also jig step 0 55 cannnot be inserted 2 Adjust the gap between the sleeve and the leveler with jig step 0 50 by tightening the two leveler adjustment screws twice if necessary After the adjustment make sure using the same method specified above that jig step 0 45 can be inserted smoothly and jig step 0 55 cannot be inserted Notes 1 When checking or adjusting the gap make the process unit level 2...

Page 40: ...eveloper material is replaced the auto toner sensor needs to be adjusted Procedure Code 0 in the 05 adjustment mode 1 If the value is not 24 make adjustment with zoom keys 4 Install the toner cartridge 0 5 Power AJ Print 0 Example 19 2 Example 24 Approx 3 minutes later 3 INTERRUPT 0 AJ 9 5 ...

Page 41: ...uler and the actual one Direction of copy paper movement Scanning motor speed 21 3 If necessary make adjustment as follows 0 5 Power PRINT 2 1 Adjust with numeric or zoom keys INTERRUPT ENERGY SAVER Test copy Larger values make the copy to be enlarged 1 16 2 Aligning amount adjustment If necessary you can extend the feed roller life by increasing the aligning amount Procedure Use codes 82 89 81 83...

Page 42: ... lead edge position can also occur due to paper quality feed roller surface condition etc first check these itmes before starting adjustment Note The lead edge position of each paper source can be adjusted independently However if adjustment for bypass feeding is necessary make adjustment in order of the cassette bypass 50 100 mm Cassette 100 200 50 53 54 55 Bypass 100 56 PFU cassette 100 57 Proce...

Page 43: ... 7 Press keys 0 and 9 simultaneously to clear the test mode 1 17 Registering Changing ID Codes Access control mode When ID codes are registered copies are classified according to each ID code To make copies a registered ID code must be entered using numeric keys New value Current value A B 11 8 12 11 5 6 0 8 0 8 Preparation for using the access control mode 0 7 Power 8 PRINT 1 INTERRUPT Power OFF ...

Page 44: ...an ID code Upper 3 figures displayed Lower 3 figures displayed PRINT ID code list display It is possible to display codes registered in order 8 PRINT Power Completed displayed PRINT Code flashes Deletion of the registered ID code Registered codes can be deleted one by one ENERGY SAVER 8 PRINT PRINT ZOOM UP key ENERGY SAVER key Power Input an ID code Input new counter value Input new counter value ...

Page 45: ...to make the auto exposure LED to come on 2 While pressing the auto exposure key press the ZOOM UP or ZOOM DOWN key and the light MAX or dark MAX LED flashes 3 Each time the light MAX or dark MAX LED flashes the AJ value is increased or decreased by 2 ON ON Flashing ON 4 When you release one of the keys you pressed simultaneously the display goes back to step 1 completing the adjustment B Manual ex...

Page 46: ...1 Press the PHOTO key to make the photo LED and the manual exposure center LED to come on 2 While pressing the PHOTO key press the ZOOM UP or ZOOM DOWN key and the light MAX or dark MAX LED flashes 3 Steps 3 4 are the same as for the auto exposure adjustment ON ON ON PHOTO Flashing ...

Page 47: ...over haul every 180 000 copies 1 Replace all the cosumables 2 Check to see if there is any damage to parts of the drive section gear pulley timing belt etc Replace parts on principle if damaged 3 Check to see if there is any damage or peeling of adhered parts tape Mylar etc Replace any affected parts 4 Check to see if all the switches and sensors operate properly Replace them if they are not opera...

Page 48: ...l 20 Mirror 1 or A system 21 Mirror 2 or A 22 Mirror 3 or A 23 Mirror 4 or A 24 Mirror 5 or A 25 Mirror 6 or A 26 Slit glass or A both sides 27 Reflector or A 28 Lens or A 29 Exposure lamp 30 Auto exposure sensor 31 Reproduction ratio mechanism mirrors 32 Reproduction ratio mechanism lens 33 Sliding sheets A front rear 34 Air filter Replace when heavily stained 35 Ozone filter º Chargers 40 Charge...

Page 49: ...t A SI MY 1004 9 Fuser unit 70 Teflon roller upper P 5 71 Heat roller entrance guide P 72 Rubber roller lower P 6 73 Cleaning felt roller º 7 74 Thermistor or P 75 Scrapers for heat rollers P 8 76 Heat roller exit guide P 77 Exit roller A 78 Cleaning blade Drive 80 Drive gear teeth SI system 81 Stad of drive gear SI Sorter kit 82 Shaft and bushing SI 11 Section Item to check Clean at Lubricate at ...

Page 50: ...2 4 Oct 1995 TOSHIBA CORP 1550 PERIODICAL MAINTENANCE º º º 12 º 4 3 º 5 º ª º ...

Page 51: ...2 5 Oct 1995 TOSHIBA CORP 1550 PERIODICAL MAINTENANCE º º º º º º º July 1996 ...

Page 52: ...aced be sure to check the auto toner sensor 5 Teflon roller Refer to paragraph 3 5 6 Rubber roller 7 Cleaning felt roller Refer to paragraph 3 3 8 Scraper Scraper whose tip is damaged should be replaced If you try to scrape off the toner firmly caked on the tip forcefully it may easily be damaged So replace scrapers if their tip is heavily stained 9 Transport roller When oiling the transport rolle...

Page 53: ...d the sorter kit roller apply a drop of silicone oil to the shaft and the shaft interior reassemble the roller and then rotate it to spread the oil This oiling is performed as a countermeasure to abnormal noise Oiling to the shaft Silicone oil Oiling to the internal surface of the bushing Silicone oil July 1996 ...

Page 54: ...um jig P100 I2 Wire holder jig P100 I3 Doctor sleeve jig P100 I4 Refer to SERVICE PARTS LIST ED 1550 2 4 Jig List 2 3 Supplies Parts Replacement Schedule Replacement cycle Parts List No Parts name Code name Number of copies Page item No x 1000 2 Main blade PS BL1550D 60 P17 I34 3 Toner bag PS TB1550 20 P6 I38 PS TB1550E for Europe 11 Drum PS OD1550 60 or more P14 I1 35 Ozone filter 60 P3 I7 42 Cha...

Page 55: ...r in a place where the humidity is high After a package is opened be sure to place and store it in a storage bag 3 2 Inspecting and Cleaning OPC Drum A Precautions for Handling 1 Use of gloves If fingerprints or oils adhere to the drum surface which degrades the characteristics of the photo conductor this affects the quality of the copy image therefore do not touch the drum surface with your bare ...

Page 56: ... an undesirable effect on the drum 5 Repairing Scratches on OPC Surface If a scratch exists on the OPC surface through which the aluminium substrate can be seen no copy image will be produced on this area and in addition the cleaning blade will be damaged so replacement with a new drum will be necessary 6 Collecting Used OPC Drums For disposition of used OPC drums it is recommended to proceed acco...

Page 57: ...he alminum substrate is easily damaged and if damaged will result in poor drum cleaning Lower Pressure Roller 1 Do not leave oil fingerprints etc on the roller surface 2 Checking 1 Check for staining and damage to the heat roller and clean or replace if necessary 2 Clean the separation claws and check for chipped claws 3 Check cleaning condition of cleaning felt 4 Check the thermistor for proper c...

Page 58: ...Q3 Is the Service Call message displayed after the lens and mirror move NO Check item 3 Lens and Mirror Errors Q4 Use the TEST MODE CH 0 4 command code 21 or 22 to move the lens and mirror to the paper exit position enlargement position then turn the power supply ON and OFF again When the power is turned ON again do the lens and or mirror make an out of step noise at the home position NO YES For s...

Page 59: ...re a loud noise after the carriage hits the home position Q2 Is there a loud noise after the carriage moves slightly or attempts to move NO YES Turn OFF the power supply and then move the carriage by hand It feels as if there is backlash Retighten the setscrews of the scanning motor It feels as if the carriage gets caught halfway Check if the carriage is getting caught somewhere The carriage moves...

Page 60: ...e lens motor and mirror motor to check that they operate smoothly Should it stop halfway as if caught and an out of step noise be heard check the mecha nism The out of step noise is heard but there is no movement Rotate the motor gears by hand to move the mirror or lens slightly and carry out the operation test again If the out of step noise is heard again but there is no movement LNS MTR Check fo...

Page 61: ...s 1 and 6 of J7 on PWA LGC and turn ON the power supply Q1 Does the heater come ON YES NO Is the voltage of J7 4 5 V NO Is the level of pin 1 of IC6 on PWA LGC H NO Check for disconnection or short circuiting in or around Q1 Q3 IC6 YES Check for disconnection short circuiting or damage around IC6 J7 YES Is the level of pin 11 of J3 L NO Check for imperfect contact or disconnec tion around 69 of IC...

Page 62: ... short circuiting around R7 R8 R170 R28 R25 R26 R27 R29 on PWA LGC Q3 Does the heater lamp remain ON even when the voltage displayed on the tester rises above 2 5 V NO YES Turn off the main switch and unplug and disconnect the heater on PS ACC Turn on the main switch check that the heater is OFF After checking that the fuser unit is hot check the following 1 Check for damage disconnection or short...

Page 63: ... the LED is OFF Check if the connector of J531 and J532 on main motor is disconnected Check if fuse on PS ACC is blown 2 When the LED is ON and does not flicker Check that the main motor makes no unusual noise when it rotates Check for disconnection or short circuiting around main motor and J10 4 R69 105 IC10 55 on PWA LGC and the harness that runs from J10 to main motor ...

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