No Shooting; Image Cannot Be Taken - Epson PhotoPC 850Z Service Manual

EPSON PhotoPC 850Z
Table 3-2. Check points when the camera has no power
Checking
Check Point
Order
Check 80-pin (XIN) oscillation
6
of IC301.
Check 82-pin (XCIN)
7
oscillation of IC301.
8 Check IC301.

3.2.2 No Shooting

Table 3-3. No Shooting
Checking
Check Point
Order
1 Press the shutter button.
Check 7-pin (SCAN IN 3)
2
pulse input of IC301.
Check 7-pin or 8-pin (/PON,
3 /P(A) ON) pulse input of
CN301.
Is 6-pin, 12-pin, or 13-pin of
4
CN301 HIGH?
Is the serial communication
5
normal?
6 Check CA2.
Troubleshooting
Judgement Solution
NO Check X3001.
Check X3002, R3004,
NO
C3001, and C3002.
-- --
Judgement Solution
-- --
Check POWER
NO SWITCH, CN301,
Q3005, Q3006, R3024.
Check IC301, Q3005,
LOW
Q3006, and PW1.
Check IC301, PW1, and
NO
CA2.
NG Check IC301 and CA2.
-- --
Trouble Shooting

3.2.3 Image Cannot be Taken

Table 3-4. Image Cannot be Taken
Checking
Check Point
Order
Is the system drive clock
1 (72MHz) input to 280-pin
(CLK IN1) of IC102?
Is CLK (36MHz) input to 132-
2
pin (CLK IN) of IC101?
3 Check 61-pin (ZAS) of IC101.
Check 52-pin (ZBREQ) of
4
IC101.
Check 56-pin (ZBGRNT) of
5
IC101.
Check the signal of 118-pin
6 and 119-pin (IRL1, 2) of
IC101.
Check CPU and soldering for
7
the memory, etc.
Revision A
Judgement Solution
YES Check X1101 and IC111.
NO Check 278-pin of IC102.
Check the address with
NG
IC121 and data bus.
NG Check ASIC
NG Check ASIC.
8-bit microprocessor and
NG HAND SHAKE of RS-
232C are defective.
-- --
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