– 23 –
5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
PUSH THE POWER
SW FOR A WHILE
IC301-44
(SCAN OUT2)
PULSE INPUT
CHECK S3103
IC303-7 5.3 V
(BOOST 5.3 V)
CHECK TCA, IC955,
Q9562
IC301-9, 38, 62
(VDD)
IC301-56
(RESET)
CHECK IC303
CHECK IC303, RB302
IC301-52
(BAT OFF)
CHECK RB302
IC301-61
OSCILLATION
CHECK X3001
IC301-58
OSCILLATION
CHECK X3002
CHECK IC301
PUSH SHUTTER
BUTTON
IC301-32, 31
(SCAN IN 3, 4)
PULSE INPUT
CHECK D3115
CL521, CL502, CL503
(P ON, P(A) ON,
P(A) ON2)
CHECK IC301, IC101,
PWA BLOCK
SERIAL
COMMUNICATION
CHECK IC301,
CP1 DMA BLOCK
CHECK CP1 DMA
BLOCK
TAKING INOPERATIVE
NO
YES
LOW
LOW
LOW
NO
NO
NO
YES
HIGH
HIGH
HIGH
YES
YES
YES
HIGH
OK
NO
LOW
NG
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
NO OPERATION IF ABSENT
CHECK X1101 OSCILLATOR, IC111, IC112
X1101, IC111-1,
IC112-1
CHECK OSCILLATION
IC301-67, 66
(ASIC_SO, ASIC_SI)
CHECK SOLDERING
OF MEMORY
EACH PIN
INCORRECT HANDSHAKING
BETWEEN 8-BIT CPU AND ASIC
CHECK EACH INTERFACE
OK
OK
NG
NG
