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2HA/2HB
2-3-14
2-3-4 Operation unit PWB
Figure 2-3-7 Operation unit PWB block diagram
The operation unit PWB (OPWB) consists of key switches, LEDs, 7 segment LED and buzzer. The lighting of LEDs is
determined by scan signals (SCAN0 to SCAN7) and LED lighting selection signals (LED0 to LED12) from the main PWB
(MPWB). The key switches operated are identified by the scan signals (SCAN0 to SCAN7) and the return signals (KEY0
to KEY4).
K5 K10 K15 K20 K25 K30 K39 K38
K4 K9 K14 K19 K24 K29 K37K34
K3 K8 K13 K18 K23 K28 K36K33
K2 K7 K12 K17 K22 K27 K32
K1 K6
D1
+5V
+5V
BUZERDRN
SCAN7N
SCAN6N
SCAN5N
SCAN4N
SCAN3N
SCAN2N
SCAN1N
SCAN0N
10
9
8
7
6
5
4
3
2
1
f1
f2
f3
g1
g2
g3
DP1
DP2
DP3
Dig1
Dig1
Dig2
Dig3
27
23
17
28
22
12
5
9
14
3
26
19
18
e3
e2
e1
d3
d2
d1
c3
c2
c1
b3
b2
b1
a3
a2
a1
10
6
1
11
7
2
13
8
4
15
20
24
16
21
25
KEY4
KEY3
KEY2
KEY1
KEY0
LED12
LED11
LED10
LED9
LED8
LED7
LED6
LED5
LED4
LED3
LED2
LED1
LED0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BZ1
YC1
U1
SW
LED
7 segment
YC2
21
K11 K16 K21 K26 K35K31
D2
21
D3
21
D4
21
D5
21
D6
21
D7
21
D8
21
L9 L18 L27 L36 L46
L37 L75L76
L55 L64 L73
L8 L17 L26 L35 L45 L54 L63 L72
L7 L16 L25 L34 L44 L53 L62 L71
L6 L15 L24 L33 L43 L52 L61 L70
L5 L14 L23 L32 L42 L51 L60 L69
L13 L22 L31 L41 L50 L59 L68
L3 L12 L21 L30 L40 L49 L58 L67
L2 L11 L20 L29 L39 L48 L66
L1 L10 L19 L28 L38 L47 L56 L65
L74
- Service Manual 1
- Digital Copy 1
- Double-pole/neutral fusing 3
- Safety precautions 5
- 1.Installation Precautions 7
- 2.Precautions for Maintenance 8
- 3.Miscellaneous 9
- CONTENTS 11
- 1-5 Assembly and Disassembly 12
- 2-1 Mechanical construction 12
- 2-2 Electrical Parts Layout 13
- 2-3 Operation of the PWBs 13
- 2-4 Appendixes 13
- INSTALLATION GUIDE 13
- 1-1-1 Specifications 15
- °C/71.6°F, 60% RH) 15
- °C/356°F thermostat 15
- 1-1-2 Parts names 17
- 1-1-3 Machine cross section 19
- °C/50 to 90.5°F 21
- ±0.3%/60 Hz ±0.3% 21
- (1) Installation procedure 22
- Toner container release lever 25
- Toner container 25
- Front right cover 27
- Power source PWB 29
- Wire of the drawer heater 29
- 1-3-1 Maintenance mode 33
- Correct image Output 44
- Leading edge registration 44
- Center line of printing 45
- Trailing edge margin 46
- Original Copy 47
- ± 1.5 mm 48
- ± 1.35 mm 48
- Scanner center line 52
- Reference 55
- 1/2" x 14" 56
- 1/2" x 11" 56
- 1/2" x 8 1/2" 56
- 1 2 3 62
- 4 5 6 62
- 7 8 9 62
- 1/2" size 75
- –2.0–2.0 77
- (P.1-3-45) 78
- (P.1-3-47) 78
- (P.1-3-46) 79
- 1/2" sheets 84
- 1-3-2 Copier management 92
- 1-4 Troubleshoo ting 97
- 1-4-2 Self-diagnosis 111
- (15)Image is partly 116
- 1-4-4 Electric problems 122
- 1-4-5 Mechanical problems 125
- 1-5 Assemb ly and Disassembly 127
- 1-5-2 Paper feed section 129
- Separation pulley 130
- Lower paper feed unit 130
- Separation pulley unit 130
- Paper feed clutch 131
- Stop ring 131
- Registration guide 131
- Upper paper feed unit 131
- MP upper cover 134
- MP lower cover 134
- Connector 134
- Paper conveying unit 134
- MP paper feed pulley unit 136
- MP paper feed pulley 136
- MP paper feed 136
- MP separation pad 136
- 1-5-3 Optical section 138
- Scanner wire 141
- Scanner wire drum shaft 141
- Frame securing tool 143
- Mirror 1 frame 143
- Mirror 2 frame 143
- 1-5-4 Drum section 149
- Main charger unit 151
- Main charger 151
- 1-5-5 Developing section 152
- 1-5-6 Transfer section 153
- 1-5-7 Fuser section 154
- Fuser unit 155
- Connectors 155
- Heat roller guide 158
- Fuser left unit 158
- Heat roller separation claws 158
- Heat roller 159
- Heat roller bushing 159
- Fuser thermostat 160
- Fuser thermistor 160
- Jumper switch 163
- DIMM slot 163
- 2-1-1 Paper feed section 165
- 2-1-2 Optical section 167
- 2-1-3 Drum section 171
- 2-1-4 Developing section 172
- 2-1-6 Fuser section 176
- 2-1-8 Duplex section 178
- 2-3-1 Power source PWB 185
- 2-3-2 Main PWB 188
- 2-3-3 Engine PWB 192
- 2-3-4 Operation unit PWB 198
- 2-3-5 CCD PWB 201
- 1/2", two sheets 203
- Maintenance parts list 207
- General wiring diagram 212
- INSTALLATION GUIDE FOR 213
- THE 300-SHEET CASSETTE 213
- THE DOCUMENT PROCESSOR 220
- 15mm15mm 224
- THE DUPLEX UNIT 231
- THE Printing System (X) 239
- Français 240
- Italiano 240
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