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5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
TURN THE SELECT
DIAL
IC301-2
(SCAN OUT2)
PULSE INPUT
CHECK
CN306-3~8
IC302-7 4.7 V
(BOOST 4.7 V)
CHECK CP1, IC954,
Q9512
IC301-10
(VDD)
IC301-36
(RESET)
CHECK IC302
CHECK IC302, R3004
IC301-43
(BAT OFF)
CHECK R3003
IC301-40
OSCILLATION
CHECK X3001
IC301-37
OSCILLATION
CHECK X3002
CHECK IC301
PUSH SHUTTER
BUTTON
IC301-54, 55
(SCAN IN 4, 5)
PULSE INPUT
CHECK UNIT
CONTROL PANEL,
D3012, R3024, R3025
CN301-5, 6
(P ON, P(A) ON)
CHECK IC301,
RB301, PW1
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 AND IC111
CLK (98 MHz)
INPUT TO
IC101-5 (CLK IN 1)
CLK (48 MHz)
INPUT TO
IC101-6 (CLK IN 2)
CHECK IC111 etc.
IC301-15, 16
(ASIC_SO, ASIC_SI)
CHECK SOLDERING
OF MEMORY
EACH PIN
INCORRECT HANDSHAKING
BETWEEN 8-BIT CPU AND ASIC
CHECK EACH INTERFACE
OK
OK
OK
NG
NG
NG
