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AL-1551 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4-5

6. PWB unit

No. Name Function

1 Exposure lamp invertor PWB Exposure lamp (Xenon lamp) control

2 Main PWB (MCU) Copier control

3 Operation PWB Operation input/display

4 Power PWB AC power input, DC voltage control, High voltage control

5 CCD sensor PWB For image scanning

6 LSU motor PWB For polygon motor drive

7 TCS PWB For toner sensor control

8 LSU PWB For laser control

9 Memory PWB 6MB For memorying data

10 GDI Printer PWB GDI Printer control

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 125 126

DIGITAL COPIER 1
CAUTION 2
CONTENTS 4
[1] GENERAL 5
[2] SPECIFICATIONS 6
3. Copy performance 8
4. Printer specifications 9
[3] CONSUMABLE PARTS 10
Production control 11
1. Appearance 12
2. Internal 12
1234567 891011 12 13
181716151413 13
(AL-1551) 13
4. Motors and solenoids 14
5. Sensors and switches 15
6. PWB unit 16
7. Cross sectional view 17
1. Copier installation 18
2. Cautions on handling 18
4. Unpacking 19
4 or 5 times 20
Paper guide (B) 20
Paper guide (A) 20
8. Power to copier 21
B. Windows 98: 22
C. Windows Me/Windows 2000: 22
D. Windows 3.1x: 22
10.Parallel interface 23
[6] COPY PROCESS 24
2. Outline of print process 25
3. Actual print process 25
About DC 5.2kV 26
Process controlling 27
[7] OPERATIONAL DESCRIPTIONS 28
2. Scanner section 29
No Component Function 30
(1) Heat roller 31
(2) Separator pawl 31
(3) Thermal control 31
(4) Fusing resistor 31
7. SPF section 35
C. Operational descriptions 36
A. Initial state 36
B. Front copy 36
Upper Side of Gate 37
Gate OFF 37
Transfer 38
Lock pawl rear 38
Lock pawl front 38
2. Operation panel section 39
3. Optical section 40
Thermistor 41
PPD2 sensor 42
Hearter lamp 42
Heat roller 43
B. Disassembly procedure 44
Clutch unit 48
Paper feed 48
Wire treatment 49
7. Rear frame section 52
8. Power section 53
A. Sensor PWB 54
B. Pickup solenoid 54
C. Clutch 54
F. SPF motor 55
G. Paper entry sensor 55
10.2nd cassette section 56
D. Transport roller 57
E. Paper feed clutch 57
F. 2nd paper feed roller 57
B. Cassette detection switch 57
C. Paper feed solenoid 57
(1) Remove the rear cabinet 58
(2) Remove the shield plate 58
(3) Remove the RSPF 59
(1) Remove the clutch unit 60
(2) Remove the clutch 60
J. Transport unit removal 61
K. Belt 1 61
(1) Remove the parts 62
(2) Remove the parts 63
(1) Remove the reverse gate 64
(2) Remove the solenoid 64
Fixing Screws 65
Set screw 66
Scanner unit drive pulley 66
LL and LR: 67
Distance between the copy 67
(1) Outline 68
Shizuoka 69
(1) Lead edge adjustment 70
Lens unit number 70
( ) direction 70
Reference line (0) 70
(+) direction 70
2.0mm or less 71
2. Copy density adjustment 72
Non toner 73
Toner save 73
The front edge of the 74
Front edge of paper 74
[10]SIMULATION, TROUBLE CODES 75
2. List of simulations 76
4. Trouble codes 88
[11]USER PROGRAM 89
[12]ELECTRICAL SECTION 90
B. MCU PWB unit 91
(1) CPU signal table 92
(2) ASIC (Signal table) 94
3. Reset circuit 99
A. Outline 100
5. Driver circuit (Solenoid) 101
7. Main motor drive circuit 101
8. Mirror motor circuit 102
9. Duplex motor circuit 102
A. Block diagram 103
(1) Main section 104
(2) FW signal 105
(3) Heater lamp drive circuit 105
(4) High voltage section 105
11.CL invertor PWB (circuit) 106
13.Operation section 107
[13]CIRCUIT DIAGRAM 108
AL-1551 CIRCUIT DIAGRAM 13-2 109
AL-1551 CIRCUIT DIAGRAM 13-3 110
AL-1551 CIRCUIT DIAGRAM 13-4 111
AL-1551 CIRCUIT DIAGRAM 13-5 112
AL-1551 CIRCUIT DIAGRAM 13-6 113
AL-1551 CIRCUIT DIAGRAM 13-7 114
AL-1551 CIRCUIT DIAGRAM 13-8 115
AL-1551 CIRCUIT DIAGRAM 13-9 116
GDI MEMORY PWB (6MB) 117
POWER SUPPLY (120V/127V) 118
POWER SUPPLY (200V Series) 119
ACTUAL WIRING DIAGRAM 1/5 120
AL-1551 CIRCUIT DIAGRAM 13-14 121
AL-1551 CIRCUIT DIAGRAM 13-15 122
AL-1551 CIRCUIT DIAGRAM 13-16 123
AL-1551 CIRCUIT DIAGRAM 13-17 124
CAUTION FOR BATTERY DISPOSAL 125
COPYRIGHT 126
2001 BY SHARP CORPORATION 126

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