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5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
IC302-7
(UNREG)
CHECK PWA
IC301-9, 36, 59
(VDD)
CHECK IC302-6
IC301-53
(RESET)
IC301-49
(BAT OFF)
CHECK IC302-5,
RB305
CHECK IC302-4,
RB305
IC301
4 MHz OSCILLATION
CHECK X3001
IC301
32 kHz OSCILLATION
CHECK X3002,
R3008, C3008, C3012
CHECK IC301
PUSH SHUTTER
BUTTON
IC301
(SCAN IN)
PULSE INPUT
CHECK
SHUTTER SW S5452,
R3004
IC301-19, 20
(P ON, P(A) ON)
CHECK IC301,
PWA BLOCK
IC301-17, 24
CHECK IC301,
DMA BLOCK
CHECK DMA BLOCK
TAKING INOPERATIVE
LOW
LOW
LOW
LOW
NO
NO
HIGH
HIGH
HIGH
HIGH
YES
YES
YES
HIGH
OK
NO
LOW
NO
IC301 (SCAN IN)
PULSE INPUT
CHECK
POWER SW S3510
NO
YES
SERIAL
COMMUNICATION
CHECK IC301
YES
NG
