Canon BJC-8500 Service Manual page 197

BJC-8500
1 2
CONTROL ROM & EEPROM & SRAM
EECS
<01-E1>
EECK
<01-F3>
EEDI
<01-E3>
EEDO
<01-F3>
CAD <23..0> 24
<01-G10,02-G10>
R501
10K,
1/16W
EPOE
<02-E10>
0
8
1
9
2
10
3
11
16
CDT <15..0>
<01-G10,02-G10>
3 4
19
18
8
7
6
5
+5V +5V +5V +5V +5V +5V +5V +5V
4
3
R502 R503 R504 R505 R506 R507 R508
2
10K, 10K, 10K, 10K, 10K, 10K, 10K,
1
1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W
5 6 7
EEPROM (4Kbit)
SOE
<02-A10>
+5V
IC501
+5V
1 1
8 8 SWE0
<02-D10>
CS VCC
2 2 7 7
SK NC C501
3 3 6 6
DI TEST 0.1 ,25V C503
4 4 5 5
DO GND 0.1 ,25V
S29330ADP
ICS501
DILB8P-8J
CONTROL ROM (8Mbit)
IC502
20
1 42
A18 NC
9
2 41
A17 A8
3 40 10
A7 A9
11
4 39
A6 A10
12
5 38
A5 A11
6 37 13
A4 A12
+5V +5V +5V +5V
7 36 14
A3 A13
15
8 35
A2 A14
R509 R510 R511 R512
16
9 34
A1 A15 10K, 10K, 10K, 10K,
10 33 17
A0 A16
1/16W 1/16W 1/16W 1/16W
11 32
CE VPP
12 31
GND GND
13 30
OE O15
14 29
O0 O7
15 28
O8 O14
16 27
O1 O6
17 26
O9 O13
18 25
O2 O5
19 24
O10 O12
20 23
O3 O4
21 22
O11 VCC
ICS502
DILB42P-8J
8 9
LOGIC BOARD 04
SRAM (256Kbit)
IC503
1 28 10
OE A10
11 2 27
A11
CE
3 26
9 7
A9 I/O8
4 25 6
8
A8 I/O7
13 5 24 5
A13 I/O6
6 23 4
R/W I/O5
7 22 3
VDD I/O4
14 8 21
A14 GND
12 9 20 2
A12
I/O3
10 19 1
7
A7 I/O2
6 11 18 0
A6 I/O1
5 12 17 0
A5
A0
13 16
4 1
A4 A1
14 15 2
3
A3 A2
TC55257DFTL-55L
8 SDT <7..0>
16 SAD <15..0>
+5V +5V +5V +5V
R513 R514 R515 R516
10K, 10K, 10K, 10K,
1/16W 1/16W 1/16W 1/16W
RESET
15
7
14
6
13
5
+5V
12
4
C504
0.1 ,25V
Part 5: Maintenance
10
A
B
C
<02-B10>
<02-E10>
D
<01-E8,02-D2>
E
F
G
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