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5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
BARRIER SW
MAIN SW ON
NORMAL
IC301-20 (SCAN IN 0)
PULSE INPUT
CHECK
BARRIER SW,
RB301, D3007
IC302-7 (UNREG)
CHECK
POWER BLOCK
IC301-53
(VDD)
IC301-19
(RESET)
CHECK IC302
CHECK IC302, R3054
IC301-31
(BAT OFF)
CHECK IC302, R3053
IC301-15
OSCILLATION
CHECK X3001
IC301-44
OSCILLATION
CHECK X3002
CHECK IC301
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
NO OPERATION IF ABSENT
CHECK X1102 OSCILLATOR, C1104, C1105
CLK (28.63636MHz)
OSCILLATION
CHECK X1102
SD CLK (57.27 MHz)
OSCILLATION
IC103-38
SD RAM (IC103) MOVEMENT CLOCK
NO READ PROGRAM FROM IC121 IF ABSENT
CHECK IC102, IC103
IC102-237
IC301-39, 40
CHECK SOLDERING OF
MEMORY PIN
INCORRECT HANDSHAKING BETWEEN 8-BIT
CPU AND RS-232C
CHECK EACH INTERFACE
PUSH SHUTTER
BUTTON
IC301-20, 21
(SCAN IN 0, 1)
PULSE INPUT
CHECK RB301,
D3006, D3007
CN301-34
(P ON)
CHECK IC301,
POWER BLOCK
IC102-176
(P(A) ON)
CHECK, IC301, ASIC
(IC102), CA-A BLOCK,
POWER BLOCK
SERIAL
COMMUNICATION
CHECK
IC301, CA-A BLOCK
CHECK CP1
TAKING INOPERATIVE
LOW
OFF
NO
LOW
LOW
LOW
NO
NO
ON
YES
HIGH
HIGH
HIGH
HIGH
YES
YES
NO
OK
OK
NG
NG
YES
YES
HIGH
HIGH
OK
NO
LOW
LOW
NG
