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5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
TURN THE SELECT
DIAL
IC301-2
YES
(SCAN OUT2)
PULSE INPUT
NO
NO
IC302-7 4.7 V
CHECK CP1, IC954,
(BOOST 4.7 V)
YES
LOW
IC301-10
(VDD)
HIGH
LOW
IC301-36
CHECK IC302, R3004
(RESET)
HIGH
LOW
IC301-43
(BAT OFF)
HIGH
NO
IC301-40
OSCILLATION
YES
NO
IC301-37
OSCILLATION
YES
CHECK IC301
NO PICTURE
MAIN CLOCK FOR SYSTEM OPERATION
CLK (98 MHz)
NG
NO OPERATION IF ABSENT
INPUT TO
CHECK X1101 OSCILLATOR AND IC111
IC101-5 (CLK IN 1)
OK
CLK (48 MHz)
NG
INPUT TO
CHECK IC111 etc.
IC101-6 (CLK IN 2)
OK
INCORRECT HANDSHAKING
NG
IC301-15, 16
BETWEEN 8-BIT CPU AND ASIC
(ASIC_SO, ASIC_SI)
CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY
EACH PIN
CHECK
CN306-3~8
Q9512
CHECK IC302
CHECK R3003
CHECK X3001
CHECK X3002
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-54, 55
(SCAN IN 4, 5)
PULSE INPUT
CN301-5, 6
(P ON, P(A) ON)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
– 17 –
CHECK UNIT
NO
CONTROL PANEL,
D3012, R3024, R3025
YES
LOW
CHECK IC301,
RB301, PW1
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK
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