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ER-A770
Service Manual
Sharp ER-A770 Service Manual Page 75
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5. Inverter PWB
6. Noise filter PWB
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SERVICE MANUAL
1
CHAPTER 1. SPECIFICATION
2
3. Display
4
CHAPTER 2. OPTIONS
5
ER-A770 bus connector
7
CHAPTER 3. SERVICE PRECAUTION
8
IPL from IR
10
Connected 115200
10
21 22 23 24 25 26 27 28
10
SENDING 00000
11
4. Note for handling of LCD
12
6. Others
12
SRV. reset
13
MRS-1 Key
14
Symbol/PartsCod)
15
MRS-3 Key
16
ENTER PASSWORD
16
1. General
17
2. System configuration
17
3. Diagnostics
17
3-2. RAM Diagnostics
18
UP-P02MB2 Check
19
Error Address xxxxxxH
19
Write Data xxxxH
19
Read Data xxxxH
19
3-5. RS232 I/F Diagnostics
20
RS232 CH1 Check
21
ER-DR : ERROR!!
21
Rear Display Check
23
• Satellite machine setting
24
• Master machine setting
25
Magnetic Card Reader Check
26
TRACK1:BUFFER EMPTY
26
TRACK1:MCR ERROR
26
TRACK2:BUFFER EMPTY
26
TRACK2:MCR ERROR
26
1. Hardware block diagram
27
2) Block diagram
29
3) Pin description
30
2-2. G.A.(MPCA8)
31
2-3. OPC2
35
1) Features
38
2) Pin configuration
38
3) General description
39
4) Pin description
39
2) General description
39
3) Pin configuration
40
4) Functional description
40
5) Pin description
40
DMA CONTROLLER
41
1) FEATURES
41
2-7. MB62H149
42
1) Pin Configuration
44
2-9. CKDC9 (HD404728B02FS)
46
(MAX4MB)
48
4. LCD display
49
5. Customer display
49
6. Pseudo SRAM (Standard)
50
7. NOR-type flash memory
50
8. SSP control
50
9. Interrupt control
50
10. WAIT control
51
11. CKDC9
51
12. Option RAM interface
51
13. Reset sequence
52
14. Drawer
52
16. RS232
53
CHAPTER 8. CIRCUIT DIAGRAM
54
FLASH ROM
56
ODD SIDE
57
EVEN SIDE
57
+24V/+5V POWER CIRCUIT
65
DC-DC CNV CIRCUIT
66
CONNECTOR
67
2. CKDC PWB
68
3. INVERTOR PWB
70
4. N/F PWB
71
2. Main PWB (Side-B)
73
3. Mother PWB
74
4. CKDC PWB
74
5. Inverter PWB
75
6. Noise filter PWB
75
PARTS GUIDE
76
1 Top cabinet etc
77
2 Bottom cabinet etc
79
4 Main PWB unit
81
5 Mother PWB unit
84
6 CKDC PWB unit
84
7 NF PWB unit
85
8 Inverter PWB unit
85
9 Service tools
85
10 Supply
85
PARTS CODE NO
86
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