TOSHIBA 1550 SERVICE HANDBOOK

SERVICE HANDBOOK

PLAIN PAPER COPIER

PAPER FEEDING UNIT

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1550

MY-1004

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GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND THE SERVICE OF THE 1550/MY-1004

1. Transportation/Installation

• When transporting/installing the copier, using two persons, be sure to use the positions as indicated below. The copier is fairly heavy and weighs approximately 35 kg (76.8 lb), therefore pay full attention when handling it.

4 portions

2. Installation

• Be sure to use a dedicated outlet with AC 115V/15A (220V, 240V/10A) or more for its power source.

• The copier must be grounded for safety. Never ground it to a gas pipe or a water pipe.

• Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and direct sunlight.

• To insure adequate working space for the copying operation, keep a minim um 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, the damp heater and their periphery.

• Be sure not to touch high-voltages sections such as the chargers and the high-voltage transformer.

• Be sure not to touch rotating/operating sections such as gears, belts, pulleys, etc.

• When servicing the machines with the main switch turned on, be sure not to touch live sections such as the lamp terminal etc.

• Use suitable measuring instruments and tools.

4. Main Service Parts for Safety

• The thermofuse, thermistor, fuse, breaker and door s witch, etc. are particularly important for safety. Be sure to handle/install them properly.

5. Notice Labels

• Be sure to check the rating plate and the notice labels such as “Unplug the power cord during service”, “Hot area”, etc. to see if there is any dirt on their surface or if they are properly stuck to the 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 reassemble small parts such as screws, washers, pins, E-rings, toothed washers in the wrong places.

8. Basically, the machine should not be operated with any parts removed or disassembled.

1. ADJUSTMENT ITEMS

1.1 Error Code Table

When the “CLEAR PAPER” or “CALL SERVICE” symbol is flashing, pressing the “CLEAR/STOP” key and the “8” key simultaneously causes one of the following error codes to be displayed while the keys are pressed.

(1) Paper misfeeding in the copier paper path

Error code Content Remarks

E01 Paper misfeeding inside the copier Bypass misfeeding is also included.

(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?

(2) Paper misfeeding in the paper feeding section

Error code Content Remarks

E14 Lower cassette paper misfeeding (PFU) Paper does not arrive at the transport roller.

(3) Paper misfeeding in the ADF transport path

Error code Content Remarks

E71 Misfeeding in the ADF original feeding

section

E72 Midfeeding in the ADF original transport

section

E73 Misfeeding in the ADF original exiting

section

E75 2 in 1 (2nd-original misfeeding in the

feeding section)

1 - 1Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

(4) Paper misfeeding in the sorter transport path

Error code Content Remarks

E81 Paper delaying jam in the sorter Paper does not arrive at the entrance

transport path sensor.

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

Error code Content Remarks C21 Optical system initialization error Scanning, lens or mirror abnormal operation. C22 Optical system initialization error When the lens is moved in the paper exit

direction at the time of the start of initialization,and only if it is not detected by the switch.

C26 Blown exposure lamp detection

(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 thermistor or broken heater

when the power is turned on.

C43 Abnormal thermistor during warming up. C44 Heater breakage after the copier

becomes ready.

(9) Communication related service call

Error code Content Remarks C54 Abnormal communication between the

C55 Abnormal communication between ADF

1550 ADJUSTMENT

sorter and the main CPU

and the main CPU

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Oct. 1995 © TOSHIBA CORP.

(10) ADF related

Error code Content Remarks C71 Locked ADF main motor ADF jam LED is flashed. C72 Maladjusted aligning sensor detection ADF jam LED is flashed. C73 Faulty EEROM initialization 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.

special modes (CH, AJ).

1 - 3Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.2 Self-Diagnostic Mode

Keys pressed

simultaneously

0+1

0+2 Aging mode Aging “09”

0+3 Test mode “09”

0+5 Adjustment mode Various adjustments “09” 0+6 Forced ready mode Forces the copier to become ready. — 0+7 Aging mode Aging (with ADF) “09”

0+8 Setting mode “09”

All control-panel LEDs ON mode

Mode Description Clearing

All LEDs on the control panel come on.

Motor test and input/output check (including initialization)

Motor test and input/output checkTest mode0+4 “09”

System changing and setting defaults and PM counter

“Clear/Stop” key

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.

• All control-panel LEDs ON mode (01) :

Indication

—

AJ —

Power

All control-panel LEDs come on C/S Clear

• Aging mode (02) :

Power

Aging operation

C/S 0 9 Clear

• Test mode (03 or 04) : For this mode, refer to the “Input/Output Check” on page 1-6.

• Adjustment mode (05) : For this mode, refer to the “Adjustment Mode” on page 1-9.

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•Forced ready mode (06) :

Power

Forced ready status

Note: This mode should be used only when checking paper feeding operation.

•Setting mode (08) : For this mode, refer to “Setting Mode” on page 1-12.

Self-diagnostic mode progress diagram :

Power ON

“06”

Warming up

Stand-by

“C”

All control-panel LEDs ON

“01”

“05”

“02”

“07”

Aging

“P”

Temporary stop

“C”

“03/04”

Test mode

“09”

“05”

Adjustment mode Setting mode

“08”

“09” “09”

“P” : Press PRINT. “C” : Press CLEAR/STOP.

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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.

DARKLIGHT AUTO

Input value

2 ————

EXP1

————

—

EMP-SW

(No paper)

RGT-SW

(Paper

present)

—

( ) means that LEDs come on.

EXP2

CTR-CNT (No CTR)

EXIT-SW

(Paper

present)

CST2

(No cassette)

—

——

EXP3

HTR-RDY

(Not ready)

TNR-FUL

(Normal)

EMP-SW2

(No paper)

Paper width

sensor 2

(ON)

Removal

sensor

(ON)

Paper width

EXP4 EXP5 EXP6

DF-CNT (No DF)

————

FED-SW

(Paper

present)

sensor 1

(ON) Limit

sensor

(ON)

PFU cover

switch (open)

S-CNT

(No sorter)

SIZ03 (OFF)

SIZ13 (OFF)

Empty sensor

(ON)

Bin-home

sensor

(ON)

Developer unit switch

(none)

MRR-HOM

(Home

position)

SIZ02 (OFF)

SIZ12 (OFF)

Open sensor

One-rotation

sensor

(ON)

EXP7 EXP8

Main motor

PLL

(NG)

LNS-HOM

(Home

position)

SIZ01 (OFF)

SIZ11 (OFF)

Exit sensor

(ON)

Paper-on-tray

sensor

(ON)

—

CRG-HOM

(Home

position)

SIZ00 (OFF)

SIZ10 (OFF)

Aligning

sensor

(ON)

Entrance

sensor

(ON)

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Power

1 - 6

Nemeric keys

LED ON

Oct. 1995 © TOSHIBA CORP.

1.2.2 Output check mode (Test mode 03/04)

In the 03 or 04 test mode, you can check the status of each of the output signals by entering the following corresponding code.

Code

1 Main motor 2 Feed roller clutch (copier) 3 Aligning roller clutch (copier) 6 Toner motor 7 Optics fan 8 Exit fan 9 Pick-up roller clutch (copier)

10 Total counter Increases at each “P” key press.

20 Scanning motor At 1st “P” key press, scans forward and backward at 2nd press. 21 Lens motor At 1st “P” key press, moves to 50% position and to 200%

22 Mirror motor At 1st “P” key press, moves to 50% position and to 200%

30 HVT-M 31 HVT-TR 32 HVT-AC 33 Exposure lamp If forced on for 5 sec., it goes 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. 82 DF pick-up roller rotation

Function Code Function Group

64444474444448

position at 2nd press.

64748 64474448

At 1st “P” key press, comes on and goes off at 2nd press.

11 Main motor 12 Feed roller clutch (copier) 13 Aligning roller clutch (copier) 16 Toner motor 17 Optics fan 18 Exit fan 19 Pick-up roller clutch (copier)

71 PFU motor (PFU) 72 Pick-up roller clutch (PFU) 73 Feed roller clutch (PFU) 74 Aligning roller clutch (PFU)

644444444474444444448

64444474444448

OFF

64474448

OFF

83 DF aligning roller 84 DF transport belt rotation 85 DF pick-up roller rotation/Weight solenoid 86 DF weight solenoid 87 DF clutch 90 Sorter transport motor 91 Sorter bin motor 92 Sorter aging without paper At 1st “P” key press, starts and goes off at 2nd press.

*1: Scanning motor rotates at the preset reproduction ratio.

At 1st “P” key press, comes on and stops at 2nd press.

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Group 1

03/04

Power supply

Group 2

03/04

Power supply

Group 3

03/04

Power supply

Code Print

Operation

(one direction)

Operation

(ON)

Stop code

Print 09 Warm up

C/S

Oparation

OFF

Test mode standby state Warm up

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Oct. 1995 © TOSHIBA CORP.

1.2.3 Adjustment mode (AJ: 05)

In this adjustment mode, the following items can be adjusted or modified. (Refer to the adjustment code list.) The adjustment mode can be accessed b y turning on the power while pressing the “0” and “5” keys simultaneously.

Code Description

0 Automatic auto-toner adjustment — — Set to 24. 1 Manual exposure 100% 0~255 128 The larger, the lighter. 2 Manual exposure 154% 0~255 128 The larger, the lighter. 3 Manual exposure 50% 0~255 128 The larger, the lighter. 4 Manual exposure 200% 0~255 128 The larger, the lighter. 5 Auto-exposure 100% 0~255 128 The larger, the lighter. 6 Auto-exposure 154% 0~255 128 The larger, the lighter. 7 Auto-exposure 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

10 Exposure (dark) Inclination 0~255 0

14 Photo exposure 100% 0~255 128 The larger, the lighter.

Allowable Initial

input value value *1

Content

The larger, the lighter at the light side.

The larger, the lighter at the dark side.

15 Photo exposure 154% 0~255 128 The larger, the lighter. 16 Photo exposure 50% 0~255 128 The larger, the lighter. 17 Photo exposure 200% 0~255 128 The larger, the lighter.

Lengthwise reproduction

ratio adjustment

25 Eraser LED timing adjustment 100%

26 Eraser LED timing adjustment 200% 0~15 8

27 Eraser LED timing adjustment 50%

0~15 8

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Each increase by “1” causes the lenthwise reproduction ratio to increase by 0.1%

Each increase by “1” causes the erased position by LED to shift approx. 1mm toward the trailing edge of the paper. But the image position relative to the paper does not change. (with original surface as reference)

Code Description

Eraser LED leading edge margin

adjustment Eraser LED trailing edge margin

adjustment 35 Margin on the leading edge 36 Margin on the trailing edge

Allowable Initial

input value value *1

0~15 8

0~15 0

Content

Each increase by “1” causes the erased position by LED to shift 1mm toward the trailing edge. (with paper surface as reference)

0:No margin 1–15:Margin present (approx.

1mm/step)

38 Grid bias adjustment 0~255 128 The larger, the larger output. 39 Transfer transformer adjustment 0~255 128 The larger, the larger output. 40 Separation transformer adjustment 0~255 128 The larger, the larger output. 42 Grid bias adjustment (photo) 0~255 121 The value should be 121.

49 Automatic auto-exposure adjustment — — 53 Leading edge (copier; 100%) 54 Leading edge (copier; 200%) 55 Leading edge (copier; 50%) 0~15 8 56 Leading edge (bypass feeding)

Each increase by “1” causes the image to shift 0.80mm toward the paper leading edge.

57 Leading edge position (PFU) 60 Lens position adjustment (100%) 61 Mirror position adjustment (100%)

Each increase by “1” moves toward the exit side.

62 Enlargement correction (200%) 63 Enlargement error ratio (200%)

0~40 20

64 Reduction correction ( 50%) 65 Reduction error ratio ( 50%) 80 Aligning value (PFU) 0~31 8

Each increase by “1” causes the paper to bend more.

81 Aligning value (short size) 0~31 16 82 Aligning value (copier) 0~31 8 83 Aligning value (B5) 0~31 16

Short size: A4/A5-R,LT/ST-R B5: for B5 only The adjustment sequence must be 82

→89→81→83→80.

Each decrease by “1” causes

84 ADF aligning amount 0~15 8

the original stop position to shift about 1mm toward the original scale.

ADF original-to-original gap

(2 in 1 mode)

0~15 8

Each increase by “1” causes the gap between the originals to increase about 1mm.

Each increase by “1” causes

89 Aligning value (middle size) 0~31 16

the paper to bend more Middle size: A4-R/B5-R/FOLIO,

LG,LT-R

90 Auto-toner adjustment 0~255 128

97 ADF EEPROM initialization — —

ADF aligning sensor

automatic adjustment

——

Shows the adjustment value of the auto toner sensor.

*1: The initial value signifies the value set by the NV-RAM initialization program and not the value set at the time

of shipping from the factory.

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Oct. 1995 © TOSHIBA CORP.

Power

Code

Adjustment

Automatic auto-toner adjustment

INTERRUPT

Memorize

ENERGY SAVER

Test copy

INTERRUPT

Memorize

Clear

0 Clear

0 Power

Power

97 98

Automatic auto-exposure adjustment

ADF EEROM initialization ADF Aligning roller automatic adjustment

Ends 2 sec. later.

09 Clear

(Possible only after the  automatic adjustment  is completed.)

Clear

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1.2.4 Setting mode (08)

In this mode, it is possible to set or modify the various modes shown in the following setting code list.

Code Description

2 Size indication by the carriage 0, 1 1 0: None; 1: Available

4 Automatic sort mode 0~3 0

7 Access control mode 0, 1 0 0: None; 1: Available 8 Version 0~2 Each version 0: EUR; 1: UC; 2: JPN 9 ACT selection (reproduction ratio

in the direction of copy movement) 1: UC

10 Timer mode (auto reset) 0~10 3 (45 sec.) 2: 30sec.; 3: 45 sec.

11 Auto power saving 0~15 0

12 Maximum number of copies 0~3 0 1: Max. 99; 2: Max. 9

Allowable Initial

input value value

0, 1

0: EUR

Content

0: None; 1, 2: Sort; 3: Group

0: 100%; 1: 101%

0: None; 1: 15 sec. 4: 60 sec.; N:

0: None; 1: 30 sec. 2: 60 sec.; 3: 90 sec. 4: 120 sec.; 5: 150 sec. 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 3: Max. 500

N x15 sec.

13 Paper feeding retry 0,1 0 0: Retry; 1: No retry

14 Cassette priority selection 0~4 0

15 Exposure priority selection 0~2 0

16 A3-size double counting 0,1 0 0: Single count; 1: Double count 17 Bypass auto start 0,1 0 0: Manual start; 1: Auto start

19 Sorter priority selection 0~3 0

20 Pre-run ON/OFF 0~15 0

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0: A4/LT 3: Copier; 4: PFU

0: Auto; 1: Manual 3: Photo mode

0: Non-sort; 1, 2: Sort; 3: Group

0: OFF

N x10 sec.

1~15:

Oct. 1995 © TOSHIBA CORP.

Code Description

21 Auto cassette change 0,1 1 0: None; 1: Available

Allowable Initial

input value value

Content

22 ADF mode 0~5 0 2: AMS; 3: 2 in 1+AMS

23 Thick paper selection at bypass

pre-running

27 ADF’s APS mode 0~2

Pressing PRINT after suspension of

APS/AMS

37 Default sorter key selection 0,1 0 0: Normal; 1: Sort default

38 Heater temperature during power saving 0~7 0 4: 150°C; 5: 160°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

53 Broken exposure lamp detection 0~2 0

0,1 0 0: None; 1: Available

0: UC

1: EUR

0~2 0 1: 2nd Copying possible

0: EUR

1: UC

0: Manual; 1: APS 4: 2 in 1+APS 5: 2 in

0: Detection for each original; 1: Detection for 1st original only; 2: Prevents copying blank originals

0: 1st copying possible 2: Copying not possible

0: Heater off; 1: 120°C

2: 130°C; 3: 140°C

6: 170°C; 7: 180°C

0: None; 1: Available

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 0 2+0.2xN sec. 59 LG size 0,1 0 0: 14 inch; 1: 13 inch

62 AMS copy stop switching 0,1 0

63 DF key selection order switching 0,1 → 2in1 + APS → 2in1

69 PM counter setting 0~999,999 0 Other than 0: When set value

79 Current PM counter value 0~999,999 0

0: EUR

1: UC

0: No stop; 1: Temporary stop

0: APS → AMS → 2in1 + AMS 0: APS → AMS → 2in1 + AMS 0:No PM counter; < code 79, PM call occurs.

0 Power

Code

Setting or modifying the value

INTERRUPT

Memorize

Clear

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Code Description

89 Heater abnormal counter 0~7 0

Error code Code 89 Timing of the error Cause of the error

C41 1

C43 4 During warming up

Allowable Initial

input value value

Value

When the power is turned on

Content

Abnormal thermistor (disconnection) or broken heater

Abnormal thermistor (disconnection)

C44 6

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 during warming up or the standby mode, C43 or C44 “CALL SERVICE” symbol will flash immediately, and the value of the setting mode code 89 depends on the conditions present at the time of the occurrence.

After the finish of warming up

Broken heater Abnormal thermistor

(disconnection) Broken heater

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® July 1996

Oct. 1995 © TOSHIBA CORP.

1.3.A Installing the Carriage Drive Wire

(1) Set the wire so that its spherical terminal is

placed in the hole of the wire take-up pulley.

Spherical terminal

Wire takeup pulley

(2) Using the wire holder jig, wrap the wire on the

take-up pulley, 3-1/4 turns of the fixture-side

Wire take-up pulley

end and 5-1/4 turns of the other end.

Wire holder jig

(3) Wrap the wires on the front and rear sides, as shown and fasten them with screws.

[Front side]

Hook (feed side)

Front side wire fixture (Marking “F”)

Hook (feed side)

[Rear side]

Rear side wire fixture (Marking “R”)

5 turns

closely fit

Spherical terminal

3 turns

closely fit closely fit

Shaft

1 - 15Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

3 turns

5 turns

closely fit

(4) Install carriage 2. (5) As shown on figure , attach the wires.

[Feed side]

Wire fixing 1

8.5 turns

Shaft

Fixed to CRG 1

CRG 2

View as seen from the rear

[Exit side]

Wire fixing 7

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.

Carriage drive wire

(12.8)

(Before) (After)

(Deflect it by 2 mm)

(14.8)

Hook

Adjustment screw

Wire tension bracket

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Oct. 1995 © TOSHIBA CORP.

1.4 Position Adjustment of Carriage 1 and 2

(1) While pushing carriage 2 to exit side, tighten

the screw on the front.

(2) Fasten carriage 1 to the wire: Each screw on

the front and rear should be tightened temporarily.

(3) While pushing carriage 1 to the exit side (car-

riage 2), tighten the screws

[Exit side]

Carriage 2

[Exit side]

..... 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.

Carriage 1

1 - 17Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.5 Light Distribution Adjustment

(1) Remove the glass holder (2 screws) and then

the original glass.

(2) Move light-distribution adjustment plate 1 -

3 in the direction of the arrow (@), depend- ing on the amount of uneven light distribution.

Light-distribution adjustment plate 1

Adjustment should be made so that the image becomes darker evenly.

(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 adjustment plate 2

Light-distribution adjustment plate 3

Direction of movement

As a result of the above adjustment, there is a possibility that under-exposure or over-exposure may occur; make exposure adjustment if necessary.

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Oct. 1995 © TOSHIBA CORP.

1.6 Image Slanting and Image Distortion Adjustment

(1) Image slanting adjustment

Direction of movement Direction of movement

Image

Paper

After making a copy with the original aligned correctly 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 (

). Slanting as in B: Adjust the original scale in the direction of the ar-

row (

Original scale

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(2) Image distortion adjustment

Step 1

Direction of movement

Step 2

<Adjustment procedure> After removing the original glass, make adjustment 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:

Direction of movement

Mirror 2

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).

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Step 2: If the image is distorted as in

C or D, using the mirror unit's adjustment screw , make adjustment in the direction perpendicular to that of copy movement to make the image normal:

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

1 - 21Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.7 Mirror and Lens Adjustment

Checking and adjustment regarding the mirrors and the lens should be made by using the following procedure:

Focus/lateral reproduction-ratio adjustment

(60) ~ (65) Carriages 1/2 Mirrors 1/2

Slanted image adjustment

Original scale (60) ~ (65)

Note: Do adjustment steps in the dotted-line boxes, as required.

Carriages 1/2 adjustment

Focus/lateral reproduction-ratio adjustment

Inclined focus adjustment

Lens unit Mirror unit

Lateral deviation adjustment

Lens unit

Image distortion

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:

Allowable input value Center value Lens position data (100%) (AJ"05" mode, code 60) 0~40 20 Mirror position data (100%) (AJ"05" mode, code 61) 0~40 20 Lens position data (200%) (AJ"05" mode, code 62) 0~40 20 Mirror position data (200%) (AJ"05" mode, code 63) 0~40 20 Lens position data (50%) (AJ"05" mode, code 64) 0~40 20 Mirror position data (50%) (AJ"05" mode, code 65) 0~40 20

Adjustment should be done as follows:

Lens/mirror position values Mirror position value

100 %

(60)

Mirror position value

50 %

(65)

Normally, adjustment steps in the dotted-line boxes are unnecessary.

100 %

(61)

Lens position value

50 %

(64)

200 %

(63)

Lens position value

200 %

(62)

[A] 100% focus and lateral reproduction-ratio adjustment

(1) Make an actual-sized copy and check for the correct focus and lateral reproduction ratio; if adjust-

ment is necessary, re-enter adjustment data as described below: a If the focus is inadequate and lateral reproduction ratio is smaller:

Enter a smaller mirror-position value (code 61).

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Oct. 1995 © TOSHIBA CORP.

b If the focus is inadequate and the lateral reproduction ratio is enlarged:

Enter a larger mirror-position value (code 61).

c If the focus is adequate but the lateral reproduction ratio is reduced:

Enter a larger lens-position value (code 60).

d If the focus is adequate but the lateral reproduction ratio is increased:

Enter a smaller lens-position value (code 60).

Notes: 1. Moving either the lens or the mirror changes both the focus and the lateral reproduction ratio.

Howev er , the lens-position v alue mainly changes the lateral reproduction r atio and the mirror position value mainly changes the focus.

2. First adjust the focus, then the lateral reproduction ratio and check the focus again.

3. If the lateral reproduction ratio is not precisely adjusted (within ±0.5%), the focus cannot be correctly adjusted either.

4. The focus in the center of 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 reproduction ratio. (2) When the focus and the lateral reproduction ratio are inadequate, re-enter the values of codes 62

and 63 in the AJ "05" mode in the same way as for 100%.

[C] 50% focus and lateral reproduction ratio adjustment

(1) Make a 50% copy and check for the correct focus and lateral reproduction ratio. (2) When the focus and the lateral reproduction ratio are inadequate, re-enter the values of codes 64

and 65 in the AJ "05" mode in the same way as for 100 %.

1.8 Adjustment of Lateral Misplacement of the Lens Unit

The lens unit has adjustable mechanism. However, as the adjustment is performed at the time of shipping from the factory, no further adjustment is needed.

July 1996

1 - 23Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.9 Exposure Adjustment

(1) While pressing keys "0" and '5" sim ultaneously, turn the power supply ON. The display shows "AJ"

and indicates that the machine is in adjustment mode.

(2) Press the automatic exposure key to set the machine to manual exposure, and then select the

center step.

(3) Adjust the exposure in accordance with the procedure shown in the chart below.

Adjustment

sequence ratio

1 Manual exposure 100% 1 2 Automatic adjustment of automatic exposure 50 ~ 200% 49

*3 Light (max.) 9

*4 Dark (min.) 10

5 Manual photo exposure 100% 14

* Make adjustment only when requested by the user.

Exposure mode

Reproduction

100% or appropriate reproduction ratio

Adjustment code

When individual adjustment is required for manual, automatic and manual photo exposure in response to a request from the 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 numerical value in the

memory. 1-4 Press the “Energy saver” key and make a test copy (one) AJ 1-5 If the image of the test copy is not satisfactory, repeat

operations 1-1 through 1-4.

Note 1. Zone A: When the "Zoom" key is pressed, it increases (or decreases) in increments of one.

2. The numerical value in Zone A can be changed by using the digital keys as well as the "Zoom" key.

3. As adjustment of 154%, 50% and 200% manual exposure has already been performed, readjustment is not required. How e v er , if individual adjustment is requested b y the user, conduct the relevant adjustment in accordance with procedure (4), described later.

1550 ADJUSTMENT

1 - 24

6447448

Oct. 1995 © TOSHIBA CORP.

2 Automatic adjustment of automatic exposure

Sequence Operation Display after operation (typical)

2-0 2-1 2-2

Note 1. As automatic adjustment of automatic exposure is performed on the basis of manual exposure, be sure to

When changing the variable width of the ke y for manual e xposure in accordance with the user’ s request, carry out 3 and 4, described below.

Be sure to adjust manual exposure (100%) beforehand. (Note1) Place the adjustment chart on the original glass. (Note 2) Enter code 49 using the digital keys and then press the Print ke y.

* During automatic adjustment, the carriage will shift and the lens

and mirror will move in accordance with the reproduction ratio. The exposure lamp will flash four times.

* End of automatic adjustment is indicated by return of the display

to test mode.

conduct manual exposure beforehand.

2. Use white Ledger or A3 copy paper as the test chart.

3. When adjustment must be performed in accordance with the user’s request, perf orm by referring to (4), to be described later.

4. Avoid opening the original cover, pressing keys on the control panel or turning the power OFF, during automatic adjustment.

Refer to 1

169

199

3 Changing the amount of variation in the light image density

Sequence Operation

3-1 Input code “9” using the digital keys and press the “Print” key. 3-2 Use the “Zoom” key to increase the value to lighten the image (and vice versa). 3-3 Press the “Interrupt” key to store the value. 3-4 Press the “Energy saver” key and make a test copy. 3-5 If the image density of the test copy is not satisfactory, repeat operations 3-1 through 3-4.

4 Changing the amount of variation in the dark image density.

Sequence Operation

4-1 Input code “10” using the digital keys and press the “Print” key. 4-2 Use the “Zoom” key to increase the value to lighten the image (and vice versa). 4-3 Press the “Interrupt” key to store the value. 4-4 Press the “Energy saver” key and make a test copy. 4-5 If the image density of the test copy is not satisfactory, repeat operations 4-1 through 4-4.

1 - 25Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

5 100% manual photo exposure adjustment

Sequence Operation Display after operation (typical)

5-1 5-2

5-3

5-4 5-5

Input code “14” 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 make a test copy. If the image density of the test copy is not satisfactory, repeat

operations 5-1 through 5-4.

1442443

128

138

118

(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

sequence ratio

1 100% 1 2 3 50% 3

Manual exposure center

Exposure mode

Reproduction

154% 2

Adjustment code

4 200% 4 5 100% 5 6 7 50% 7 8 100% 8

9 Light (max.) 9 10 Dark (min.) 10 11 100% 14 12 13 50% 16 14 200% 17

Automatic exposure

Manual photo exposure

154% 6

100 % or appropriate ratio

154% 15

1550 ADJUSTMENT

1 - 26

Oct. 1995 © TOSHIBA CORP.

1 Perform the 100% manual exposure adjustment (3)- 1. 2 154% manual exposure adjustment

Sequence Operation Display after operation (typical)

2-1 2-2

Input code “2” using the digital keys, and press the “Print” key. [When density is high]

Increase the numerical value, using the “Zoom” key.

130

149

[When density is low]

2-3

2-4 2-5

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 2-1 through 2-4.

443

144424

126

3 50% manual exposure adjustment

Sequence Operation Display after operation (typical)

3-1 3-2

Input code “3” 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.

103

109

096

3-3

3-4 3-5

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.

443

144424

4 200% manual exposure adjustment

Sequence Operation Display after operation (typical)

4-1 4-2

4-3

4-4 4-5

Input code “4” 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 make a test copy. If the image density of the test copy is not satisfactory, repeat

operations 4-1 through 4-4.

443

144424

175

186

166

1 - 27Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

5 100% automatic exposure adjustment

Sequence Operation Display after operation (typical)

5-1 5-2

Input code “5” using the digital keys, and press the “Print” key. [When density is high]

Increase the numerical value, using the “Zoom” key.

115

127

[When density is low]

5-3

5-4 5-5

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 5-1 through 5-4.

44314

144424

107

6 154% automatic exposure adjustment

Sequence Operation Display after operation (typical)

6-1 6-2

Input code “6” 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.

127

139

113

6-3

6-4 6-5

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

44314

4424

operations 6-1 through 6-4.

7 50% automatic exposure adjustment

Sequence Operation Display after operation (typical)

7-1 7-2

7-3

7-4 7-5

Input code “7” 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 make a test copy. If the image density of the test copy is not satisfactory, repeat

operations 7-1 through 7-4.

443

4424

094

087

103

1550 ADJUSTMENT

1 - 28

Oct. 1995 © TOSHIBA CORP.

8 200% automatic exposure adjustment

Sequence Operation Display after operation (typical)

8-1 8-2

Input code “8” using the digital keys, and press the “Print” key. [When density is high]

Increase the numerical value, using the “Zoom” key.

141

149

[When density is low]

8-3

8-4 8-5

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 8-1 through 8-4.

443

144424

133

9 When changing the variable width of the key for manual exposure at the user’s request, change the

amount of variation in the light/dark image density in (3)- 3 and 4.

!º Perform the 100% manual photo exposure adjustment in (3)- 5. !¡ 154% manual photo exposure adjustment

Sequence Operation Display after operation (typical)

11-1 11-2

Input code “15” using the digital keys, and press the “Print” key. [When density is high]

Increase the numerical value, using the “Zoom” key.

128

138

[When density is low]

11-3

11-4 11-5

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 11-1 through 11-4.

443

144424

118

!™ 50% manual photo exposure adjustment

Sequence Operation Display after operation (typical)

12-1 12-2

12-3

12-4 12-5

Input code “16” 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 make a test copy. If the image density of the test copy is not satisfactory, repeat

operations 12-1 through 12-4.

443

144424

128

138

118

1 - 29Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

!£ 200% manual photo exposure adjustment

Sequence Operation Display after operation (typical)

13-1 13-2

13-3

13-4 13-5

Input code “17” 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 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

443

144424

1550 ADJUSTMENT

1 - 30

Oct. 1995 © TOSHIBA CORP.

1.10 Checking and Adjustment of Grid Bias/Transfer/Separation Output

Checking and adjustment of grid bias/transfer/separation output is necessary when the high-voltage transformer is replaced.

At adjustment mode "05" "38" grid bias (Black)

"39" transfer charger "40" separation charger

64448

Notes: 1. A digital tester with an input resistance of 10 MΩ or more should be used. <Adjustment procedure>

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.

4. Set the process unit into the copier and fasten the earth wire of the jig to the machine frame with a screw. Then connect the black (WH) side of the jig’s 3P-connector to the (–) terminal and the red (WH) side to the (+) terminal of the digital tester, respectively.

5. Push down the upper unit. (Be careful not to allow the jig’s cord to be pinched).

Jig

Earth wire

3P connector

For measuring the transfer/separation values

1 - 31Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

6. Turn on the door switch forecefully.

Note: When measuring the grid bias*, route the (+) terminal of the digital tester through the charger

cleaning shaft gap on the front side of the process unit and contact the charger 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

Power

Code Print

(38,39,40 or 42)

128

10. Check voltage value using digital tester

• Grid bias: –692 ±5 V (Black)

• Transfer: –586 ±20mV

• Separation: AC514 ±21mV (effective value displayed)

1550 ADJUSTMENT

AC464 ±18mV (average value displayed)

1 - 32

Oct. 1995 © TOSHIBA CORP.

11. When adjustment is required

Zoom Interruption

(Adjust voltage value) (Memory)

Note: When voiding occurs on a halftone copy, reduce the separation output.

When deficiency in separation from the drum occurs, or the user uses thin paper frequently, increase the separation output. Be careful to avoid over-increasing or over-decreasing separation output.

1 - 33Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.11 Checking and Adjustment of Developer Bias Output

<Adjustment procedure> (Use code 40 in test mode 05.)

1. Remove the process unit.

2. How to connect digital tester to the machine

• Connect (+) terminal of digital tester to bias

connector (OUT 5)

• Connect (–) common terminal of digital

tester to machine frame.

• Set digital tester to 1000 VDC range.

05 Power

128

Frame earth

5. Check voltage value using digital tester.

–DC200 V ±5 V

OUT 5

VR81

6. If adjustment is required, perform adjustment through VR81 (Bias). (Do not touch the zoom keys and the digital keys.)

C/S

(Output stop)

Note: If an overall misty effect is observed, even though exposure is sufficient, increase bias output

through VR81 (Bias). However, when bias output is over-increased, the image contrast declines, causing a generation of bias leakage, and the carrier tends to stick to the drum easily.

1550 ADJUSTMENT

1 - 34

Oct. 1995 © TOSHIBA CORP.

1.12 Drum-to-Sleeve Gap Adjustment

No adjustment is necessary since the guide contacting method is adopted for this machine.

Guide roller

1.13 Development Pole Adjustment

(1) Take out the developer unit from the process

unit.

(2) Adjustment should be made using the adjuster

plate on the rear side: After loosening the fixing screw of the adjuster plate, move and adjust it, using the adjustment 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 disassembly, etc., the initial position of the adjuster plate should be remembered or marked for later reassembly. However, whenever the magnetic roller is replaced, the adjustment of the pole-position height (H) shall be made first.

Marking

Adjuster

H=23.8mm

1 - 35Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.14 Doctor-to-Sleeve Gap

Jig to be used: Doctor sleeve jig Procedure: (1) Remove the developer unit from the process unit. (2) Remove the top cover and then the developer material. (3) Remove the charge unit and the drum. (4) Reinstall the developer unit from which the developer material is removed. (5) Pull down the developer unit pressure lever to make a pressurized condition.

Adjustment method: (1) Make sure jig step “0.45” can be inserted

between the sleeve and the leveler and moves smoothly between the front and rear , and 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. When checking or adjusting the gap, align the marking position of the sleeve to the position of the leveler.

3. When installing the developer-unit top

Doctor sleeve jig, Step "0.45"

cover, after having inserted the leaf spring hook, fasten it firmly.

4. After reinstalling the top cover, check that the rubber seal is placed over the side seals correctly.

1550 ADJUSTMENT

1 - 36

July 1996

Oct. 1995 © TOSHIBA CORP.

1.15 Auto-Toner Sensor Adjustment

After the developer material is replaced, the auto-toner sensor needs to be adjusted.

<Procedure> (Code “0” in the 05 adjustment mode)

Power

Approx. 3 minutes later

(Example)

If the value is not 24, make adjustment with zoom keys.

INTERRUPT

Install the toner cartridge.

0AJ9

1 - 37Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

1.16 Adjustment for Scanning Motor Speed, Aligning Amount and Lead Edge Position

Adjustment precedure:

Scanning motor speed

(21)

Note: Normally, Adjustments in the dotted-line boxes are unnecessary.

First of all adjust code 82 because the adjustment amount is based on it.

Aligning amount

Cassette *(82)→(89)→(81)→(83)→

(PFU cassette (80) optional)

1.16.1 Scanning motor adjustment

(Check and adjustment of the reproduction ratio in the direction of copy movement)

1. Place a ruler on the glass and make a 100% A4-size copy.

2. Two or three minutes later, compare the copied ruler and the actual one.

3. If necessary, make adjustment as follows:

Lead edge position

Cassette~bypass feeding PFU (53) ~ (56) (57)

Direction of copy paper movement

Power

Adjust with numeric or zoom keys INTERRUPT

* Larger values make the copy to be enlarged.

ENERGY SAVER

1.16.2 Aligning amount adjustment

If necessary, you can extend the feed roller life by increasing the aligning amount.

<Procedure> (Use codes 82/89/81/83/80 in the test mode “05”)

Code #

Power

ENERGY SAVER

Cassette

89 81 83

PFU

82 INTERRUPT

(Cassette)

Copy size A3(LD) A4-R(LT-R) A4(LT) B5 A4

Test copy

(Current value)

(New set value)

Test copy

1550 ADJUSTMENT

1 - 38

July 1996

Oct. 1995 © TOSHIBA CORP.

Notes

• There is no need to do this for machines which do not use B5-sized paper.

• There is no need to do this for machines which are equipped with a PFU.

2. Check the copy for any image void and if there is any, reduce the new value likes “15” → “14” → “13” ... until no image void occurs. Check for no paper misfeeding with the new value.

Voiding

50‘ 100 mm

1.16.3 Lead edge adjustment

Since incorrect 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.

Cassette

100% 200% 50%

(53) (54) (55)

Bypass

100%

(56)

PFU cassette

100%

(57)

<Procedure> (Use the appropriate codes in the “05” test mode.) Example: Adjustment for the cassette (100%)

Power

ENERGY SAVER

(Example)

Test copy for checking  the lead edge position

July 1996

1 - 39Oct. 1995 © TOSHIBA CORP. 1550 ADJUSTMENT

A = 8 B = 12

Direction of copy paper movement

Document

3. Calculate the new set value:

New value= Current value +

0.8 0.8

INTERRUPT

A–B =

11 +

8–12

= 11–5 = 6

6. Repeat step 2 onward for manual feeding and PFU cassette.

7. Press keys 0 and 9 simultaneously to clear the test mode.

1.17 Registering/Changing ID Codes (Access control mode)

Copy

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.

Power

1550 ADJUSTMENT

INTERRUPT Power OFF

1 - 40

July 1996

• Up to 10 ID codes can be registered. Input a number with three figures.

• Normally, the copier will not start unless one of the ID codes registered is keyed in.

Power

Input an

ID code

100% Power OFFENERGY SAVER

• Copy quantity can be recorded at every codes.

• The counter value is 000000 ~ 999999.

Power

Input an

ID code

ZOOM UP

Upper 3 figures

displayed

Lower 3 figures

displayed

• It is possible to display codes registered in order.

Power

Code flashes

• Registered codes can be deleted one by one.

Power

Digital key

Code input

ZOOM DOWN

• The counter value can be changed.

• For example the counter value of 012345 is changed to 123456.

Power

Input an

ID code

ZOOM UP key

Upper 3 figures

displayed

ENERGY SAVER

("---" displayed)

key

Input new

counter

Input new

counter

Completed

value

ENERGY SAVER

ENERGY SAVER key

Lower 3 figures

displayed

July 1996

1.18 User Exposure-Adjustment Mode

This mode allows the user to perform some of the exposure adjustment modes if he desires to do so. The user can adjust the following three modes:

•Manual exposure 100% (05 mode, code 1)

•Auto exposure 100% (05 mode, code 5)

•Photo exposure 100% (05 mode, code 14)

A. Auto exposure adjustment (AJ5)

(1) Press the auto-exposure key to make the auto-exposure LED to

come on.

(2) While pressing the auto-exposure key, press the ZOOM UP (or

ZOOM DOWN) ke y , 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.

(4) When you release one of the keys you pressed simultaneously,

the display goes back to step (1), completing the adjustment.

B. Manual exposure adjustment 100% (AJ1)

(1) Press the auto-exposure key to make the center LED of the manual

exposure to come on.

(2) Steps (2)–(4) are same as for the auto exposure adjustment.

Flashing

1550 ADJUSTMENT

1 - 42

C. Photo exposure adjustment 100% (AJ14)

(1) Press the PHOTO key to make the photo LED and

the manual exposure center LED to come on.

PHOTO

(2) While pressing the PHOT O ke y, press the ZOOM UP

(or ZOOM DOWN) key, and the light MAX (or dar k MAX) LED flashes.

(3) Steps (3)–(4) are the same as for the auto exposure

adjustment.

Flashing

2. PERIODICAL MAINTENANCE

Inspection every 60,000 copies

(1) Preparation

1) Ask the key operator about the present machine conditions and note them down.

2) Before starting the maintenance work, make and retain a few sample copies for later comparison.

3) Turn off the power switch and disconnect the power cord plug.

(2) The period inspection should be conducted in accordance with the PERIODIC INSPECTION CHECK

LIST shown below . Perform the inspection by ref erring to the figures, as well as to the explanations in the Service Manual when necessary.

(3) After the inspection has been completed, plug in the machine and turn the power switch on, and

confirm the general operation of the machine by making a few copies and comparing them to those made previously.

Inspection and 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 the y are not operat-

ing properly.

(5) Clean the inside of the machine thoroughly.

2.1 Periodic Inspection Check List

Symbols used in the Periodic Inspection Check List

Cleaning Lubrication Replacement Date

(A) Cleaning with alcohol (V) Vacuoline (20) Every 20,000 copies Customer’s (D) Cleaning with a (H) Heavy-medium oil (40) Every 40,000 copies Name

slightly damp cloth (L) Laune 40 (60) Every 60,000 copies Machine

(P) Cleaning with Pit Same thereafter No.

Clean (RC60) Inspector Cleaning with soft (SI) Silicone oil ( ) Replace in event of pad, cloth, or cleaner (M) Molytherm deformation or Remarks (vacuum cleaner) (W) White grease (Molycoat) other damage

Application

PERIODIC INSPECTION CHECK LIST

*K=1,000

Section Item to check

Cleaner 1 Entire Unit

2 Main blade ^º *1 (See page 2-6) 3 Toner bag @º Key operator item 4 Recovery blade *2 5 Drum bushings

Drum 10 Drum shaft

11 Drum ^º or more *3

Original 12 Glass A table

Optical 20 Mirror 1 or A system

Chargers 40 Charger case

Developer 50 Entire unit unit

13 Original cover A

21 Mirror 2 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

(front/rear) 34 Air filter 35 Ozone filter ^º

41 LED eraser array 42 Charger wire ^º

43 Terminal contact 44 Grid A^º

45 Discharge lamp

51 Developer material ^º *4 52 Rubber seal

Clean at Lubricate at Replace at

60*K copies 60*K copies x *K copies

or A

Check while

Remarks

Replace when heavily stained

Use sandpaper as required

July 1996

*K=1,000

Section Item to check

Clean at Lubricate at Replace at

60*K copies 60*K copies x *K copies

Check while

Paper 60 Pick-up roller A feeding section

61 Paper feed roller A 62 Separation roller A 63 Aligning roller A`SI *10 64 Paper guide 65 Brush 66 Transport guide section 67 Transport roller (left) A`SI MY-1004 *9 68 Transport roller (right) A`SI MY-1004 *9

Fuser unit 70 Teflon roller (upper) P `⁄¤‚ *5

Heat roller entrance guide

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 system

80 Drive gear (teeth) `

81 Stad of drive gear `SI

Sorter kit 82 Shaft and bushing `SI *11

Remarks

®July 1996

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July 1996

Remarks in the PERIODIC INSPECTION CHECK LIST:

*1.Main blade

If poor cleaning occurs even before the replacement number of copies are made due to the adhesion of paper dust, etc., since the blade edge may have been damaged, replace the main blade as required. Cleaning the edge with a dry cotton can damage it, so wipe the edge lightly using a soft cloth soaked with alcohol; be sure to check for no adhesion of cloth fibers.

*2.Recovery blade

If the edge of the recovery blade is damaged, replace the blade.

*3 Drum

Refer to paragraph 3.2.

*4 Developer material

When the developer material is replaced, be sure to check the auto-toner sensor.

*5 Teflon roller Refer to paragraph 3.5. *6.Rubber roller

14243

*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 roller, after having disassembled and cleaned the roller, apply a drop of silicone oil, and then while turning the bushing to spread the oil, insert it.

*10.Aligning roller

After disassembling the upper or lower aligning roller for cleaning, apply one drop of silicone oil to the inside of the bushing (sliding portion of the aligning roller). When reassembly has been accomplished, rotate the roller to facilitate the spreading of the oil.

® July 1996

*11.Shaft and bushing

After having disassembled and cleaned 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 perf ormed as a countermeasure to abnormal noise.

Oiling to the shaft (Silicone oil)

Oiling to the internal surface of the bushing (Silicone oil)

July 1996

2.2 Oiling Cycle Table

No.* Item to be oiled Type of oil Number of copies

63 Aligning roller Silicone oil 60 67 Transport roller (left) Silicone oil 60 68 Transport roller (right) Silicone oil 60 80 Drive gears (teeth) Silicone oil 60 81 Stad of drive gear Silicone oil 60 82 Shaft and bushing Silicone oil 60

* Numbers correspond with those in the PERIODIC INSPECTION CHECK LIST.

Note: Do not give any oil to rollers, belts and belt pulleys.

2.3 Supplies/Parts Replacement Schedule

Oiling cycle

x 1000

Replacement cycle

No.* Parts name Code name (Number of copies

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 Charger wire — 60 P15, I8/P16, I9 44 Grid — 60 P15, I13 51 Developer material PS-ZD1550 60 — 70 Teflon roller (upper) PS-HR1550U 120 P19, I2 72 Rubber roller (lower) PS-HR2510L 180 P20, I5 73 Cleaning felt roller PS-SR1550H 60 P19, I12

* Numbers correspond with those in the PERIODIC INSPECTION CHECK LIST. ** Refer to SERVICE PARTS LIST ED-1550.

2.4 Jig List

Door switch jig **P100, I1

** Refer to SERVICE PARTS LIST ED-1550.

Drum jig **P100, I2

x 1000)

**Parts List

Page/item No.

Wire holder jig **P100, I3 Doctor sleeve jig **P100, I4

July 1996

3. PRECAUTIONS FOR STORING AND HANDLING SUPPLIES

3.1 Precautions for Storing Toshiba Supplies

A. Toner and Developer

T oner and de veloper should be stored in a place where the ambient temper ature is below 35°C (95°F) and should also be protected against direct sunlight during transportation.

B. OPC Drum

Similarly to the toner and developer , OPC drums should be stored in a dark place where the ambient temperature is below 35°C. Be sure to avoid those places where drums may be subjected to high humidity, chemicals and/or their fumes.

C. Cleaning Blade and Cleaning Felt

These items should be stored in a flat place where the ambient temperature is below 35°C and should also be protected against high humidity, chemicals and/or their fumes.

D. Heat Roller and Pressure Roller

Avoid those places where heat rollers may be subjected to high humidity, chemicals and/or their fumes.

E. Copy Paper

Avoid storing copy paper 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 photoconductor), this affects the quality of the copy image; therefore, do not touch the drum surface with your bare hands.

(2) Removing and reinstalling drums

Since the OPC drum surface is very sensitive, be sure to handle the drum carefully when installing and removing it so as not damage its surface. Be sure to apply patting powder (lubricant) to the entire surface of the drum before installing the drum into the machine.

Notes:

1. Application of the patting powder is to reduce the friction between the drum and cleaning blade. If the application of patting powder is neglected, the drum and cleaning blade may be damaged.

2. When paper fibers adhere to the cleaning blade edge, they may reduce the cleaning efficiency and, in addition, may damage the blade and the drum. So, if any fibers are found adhering to the blade, be sure to remove them carefully using a soft pad.

3. Installation of Machine and Storage of Drum Avoid installing the machine in such places where it may be subjected to high temperature, high humidity, chemicals and their fumes. Do not leave drums in a bright place for a long time, otherwise the drum will fatigue and will not produce sufficient image density immediately after being installed in the machine. However, this effect may decrease as time elapses.

4. Cleaning the Drum At periodic maintenance calls, wipe clean the entire surface of the drum using the designated cleaning cotton or soft pad. Use sufficiently thick cleaning cotton so as not to scratch the drum surface inadvertently with your fingertips or nails. Also, remove your ring and wristwatch before starting cleaning work to prevent accidental damage to the drum. Be sure not to use other organic solvents or silicone oil as they will ha ve an undesirab le 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 according to the corresponding regional environmental regulations.

3.3 Checking and Replacing Cleaning Felt Roller

(1) Precautions for Handling

Never allow solvents such as thinner, etc. to adhere to the cleaning felt roller.

(2) Poor Heat-Roller Cleaning and Countermeasures

Poor heat-roller cleaning should be judged b y the deposited toner on the roller. When the f elt roller has heavy toner deposits, the heat-roller surface may be stained with toner. If this happens, replace the cleaning felt roller. The cleaning felt roller will be gradually degraded due to subjection to the heat from the heat roller over a long period of time; therefore, replace it preferably after about 60,000 copies have been made.

3.4 Checking Drum Cleaning Blade

(1) Precautions for Handling

Pay attention to the following points as the cleaning blade life is determined by its edge condition:

1. Do not allow a hard object to hit on or rub against the blade edge. Do not rub the edge with a

cloth.

2. Do not leave oil (or fingerprints, etc.) on the edge.

3. Do not put solvents such as thinner, etc. on the edge.

4. Do not deposit dirt such as paper fibers, etc. on the blade.

5. Do not place the blade near a heat source.

3.5 Checking and Cleaning Upper and Lower Heat Rollers

(1) Precautions for Handling

• Upper Heat Roller

1. Do not leave oil (fingerprints, etc.) on the heat roller.

2. Be extremely careful not to allow a hard object to hit on or rub against the roller because the thin

Teflon layer coated on the 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 contact with the heat roller.

5. Check the fused condition of the toner image.

6. Check the heat rollers for proper rotation.

(3) Cleaning Procedure for Heat Rollers

When the heat roller becomes dirty, it will cause paper jamming. In that case, wipe the roller surface clean with cotton soaked in alcohol or heat-roller cleaner “RC60” which contains silicone oil. For a better cleaning effect, clean the roller while it is still warm. Note: Be careful not to rub against the Teflon-coated surface with your fingernails or hard objects

because it is easily damaged. Do not use silicone oil on the upper heat roller.

4. TROUBLESHOOTING

(1)

Optical system initialization errors

C21

1 Turn the power supply ON/OFF, then visually check that the following units are initialized.

C21

Q1: Does the carriage function? (Follow “YES” if the carriage functions e ven slightly, or sounds as

if it is trying to function.)

YES

Check if J11, J82 are correctly connected. Check if fuse on PS-ACC is connected.

Q2: Is carriage initialization normal?

Check item 2 “Carriage Errors”.

Q3: Is the Service Call message displayed after the lens and mirror move?

YES

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?

YES

For some reason LNS-SW and MRR-SW are not switched ON/ OFF correctly:

●

Check visually if LNS-SW and MRR-SW can clear the bracket.

●

Check for disconnection or short circuiting around pins J80, J81, J11, J51, J52, J4.

Issue the

TEST MODE CH

command again and visually check

for faulty conditions.

2 Carriage errors

Remove the glass and move the carriage to the paper-feed end, then turn ON the power supply

and check the following:

Q1: Is there a loud noise after the carriage hits the home position?

YES

Home switch does not come ON.

●

Check that the connector (J58) of the home switch is properly inserted.

●

Check for disconnection or short-circuiting around J4 to J58.

Q2: Is there a loud noise after the carriage moves slightly or attempts to move?

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 smoothly:

Check if one or more of pins J11-12~17 are disconnected or short-circuiting.

Also check for disconnection or short-circuiting around IC7, J11-12~17.

3 Lens and mirror errors

Q1: Are the lens and mirror completely inoperable without any out-of-step noise being heard?

YES

●

Check if J11 is correctly connected.

●

Check if J81, J80 and J83 are correctly connected.

Remove the glass and lens cover. Press “0” and “4” keys to select

TEST MODE CH

. Using TEST CODE 21 (LNS-MTR), 22 (MRR-

MTR), move the 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 mov e 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 for disconnection or short-circuiting around pins 18 through

22 of J11 and J82.

MMR-MTR Check for disconnection or short-circuiting around pins 1 through

5 of J11 and J81, and J79.

(2)

●

C41

Open the rear cover, pull out the power supply plug and check the following:

C43

C44

Thermistor disconnection

1 Are any of the connector terminals of J7 and J64 pulled out or discounted? 2 Is either the thermostat of the heater or the heater lamp disconnected?

Check the above, and if necessary carry out repairs. Then connect digital tester between pins 1 and 6 of J7 on PWA-LGC and turn ON the power supply.

Q1: Does the heater come ON?

YES

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 IC10, Q8, Q9, J7 and J3 on PWA-LGC.

YES: Check if there is any terminal of the heater

pulled off, or whether there is a discon-

Check the next question (Q2).

nection or pulled-out connector in harnesses on PS-ACC.

Q2: Does the voltage displayed on the tester remain at 0 V?

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 that J7-5 is greater than 2.5 V and less than 5V. 2 Check that J7-6 is greater than 0 V and gradually drops

over a period of time.

3 Pull out J7, then test for continuity between 5 and 6 pins

of J7 on harness, to check if the thermistor is disconnected.

4 Check for disconnection or 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?

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-circuiting

around IC6, Q1, Q3 on PWA-LGC.

2 With the signal lines harness of the SSR pulled out, does

the heater go OFF when the door switch is forcibly turned ON and the power supply turned ON? If NO, the SSR may be damaged. Replace the SSR and check again.

Move the connectors and harnesses of J7 and the relay, and check that the voltage displayed on the tester does not drop intermittently.

(3)

●

Main motor lock

C01

Using code 1 of

TEST MODE CH

, turn ON the main motor.

Check ON/OFF condition of LED on main motor.

1 When 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, IC1055 on PWA-LGC, and the harness that runs from J10 to main motor.

TOSHIBA 1550 SERVICE HANDBOOK

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND THE SERVICE OF THE 1550/MY-1004

1. ADJUSTMENT ITEMS

1.1 Error Code Table

1.2 Self-Diagnostic Mode

1.2.1 Input check (Test mode 03/04)

1.2.2 Output check mode (Test mode 03/04)

1.2.3 Adjustment mode (AJ: 05)

1.2.4 Setting mode (08)

1.3.A Installing the Carriage Drive Wire

1.4 Position Adjustment of Carriage 1 and 2

1.5 Light Distribution Adjustment

1.6 Image Slanting and Image Distortion Adjustment

1.8 Adjustment of Lateral Misplacement of the Lens Unit

1.9 Exposure Adjustment

1.10 Checking and Adjustment of Grid Bias/Transfer/Separation Output

1.11 Checking and Adjustment of Developer Bias Output

1.12 Drum-to-Sleeve Gap Adjustment

1.13 Development Pole Adjustment

1.14 Doctor-to-Sleeve Gap

1.15 Auto-Toner Sensor Adjustment

1.16 Adjustment for Scanning Motor Speed, Aligning Amount and Lead Edge Position

1.16.1 Scanning motor adjustment

1.16.2 Aligning amount adjustment

1.16.3 Lead edge adjustment

1.17 Registering/Changing ID Codes (Access control mode)

1.18 User Exposure-Adjustment Mode

2. PERIODICAL MAINTENANCE

2.1 Periodic Inspection Check List

2.2 Oiling Cycle Table

2.3 Supplies/Parts Replacement Schedule

2.4 Jig List

3. PRECAUTIONS FOR STORING AND HANDLING SUPPLIES

3.1 Precautions for Storing Toshiba Supplies

3.2 Inspecting and Cleaning OPC Drum

3.3 Checking and Replacing Cleaning Felt Roller

3.4 Checking Drum Cleaning Blade

3.5 Checking and Cleaning Upper and Lower Heat Rollers

4. TROUBLESHOOTING