Epson PhotoPC 800, Service Manual

Page: 54 / 110

EPSON PhotoPC 800 Revision A
Trouble Shooting Troubleshooting 54
Table 3-2. Check points when the camera has no power
3.2.2 No Shooting
Table 3-3. No shooting
3.2.3 Image can not be taken
Table 3-4. Image can not be taken
Procedure
order
Check-point Judgement Solution
6
Check 80-pin (XIN)
oscillation of IC301.
NO Check X3001.
7
Check 82-pin (XCIN)
oscillation of IC301.
NO
Check X3002, R3004,
C3001, C3002.
8 Check IC301. --- --
Procedure
order
Check-point Judgement Solution
1 Press the shutter button. -- --
2
Check 4 or 5-pin of IC301
pulse input (SCAN IN 0, 1)
NO
Check S3029, R3021,
R3022 and shutter switch.
3
Check 7 or 8-pin (PON, P
(A) ON) pulse input.
LOW Check IC301 and PW1.
4
Is all 6, 17 or 8 pin (PON,
P(A) ON) of CN301 high?
NO
Check IC301, PW1 and
CA2.
5
Is the serial communication
normal?
NG Check IC301 and CA2.
6 Check CA2 -- --
Procedure
order
Check-point Judgement Solution
1
Is the system drive clock
(72MHz) input to 280-pin
(CLK IN1) of IC102?
YES Check X1101, IC111.
2
Is CLK(36MHz) input to
132-pin (CLK IN) of IC101?
NO Check 278 pin of IC102.
3
Check 61-pin (ZAS) of
IC101.
NG
Check the address with
IC121 and data bus.
4
Check 52-pin (ZBREQ) of
IC101.
NG Check ASIC.
5
Check 56-pin (ZBGRNT) of
IC101.
NG Check ASIC.
6
Check the signal of 118 and
119-pin(IRL1, 2) of IC101.
NG
8-bit microcomputer and
HANDSHAKE of RS-
232C are defective.
7
Check CPU and soldering
for memory, etc.
-- --