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5. TROUBLESHOOTING GUIDE
POWER LOSS INOPERTIVE
PUSH THE POWER
SW FOR A WHILE
IC301-42
YES
(SCAN OUT2)
PULSE INPUT
NO
NO
IC302-7 5.3 V
CHECK CP1, IC955,
(BOOST 5.3 V)
YES
LOW
IC301-33, 4
(VDD)
HIGH
LOW
IC301-9
CHECK IC302, RB302
(RESET)
HIGH
LOW
IC301-13
(BAT OFF)
HIGH
NO
IC301-8
OSCILLATION
YES
NO
IC301-11
OSCILLATION
YES
CHECK IC301
NO PICTURE
CLK INPUT TO
NG
IC111-19, 16, 11, IC112-3
CHECK OSCILLATION
OK
INCORRECT HANDSHAKING
NG
IC301-37, 38
BETWEEN 8-BIT CPU AND ASIC
(ASIC_SO, ASIC_SI)
CHECK EACH INTERFACE
OK
CHECK SOLDERING
OF MEMORY
EACH PIN
CHECK S3002
Q9562
CHECK IC302
CHECK RB302
CHECK X3001
CHECK X3002
MAIN CLOCK FOR SYSTEM OPERATION
NO OPERATION IF ABSENT
CHECK X1101 OSCILLATOR AND IC111
TAKING INOPERATIVE
PUSH SHUTTER
BUTTON
IC301-53, 52
(SCAN IN 3, 4)
PULSE INPUT
CL531, CL532
(P ON, P(A) ON)
SERIAL
COMMUNICATION
CHECK CP1 DMA
BLOCK
– 21 –
CHECK UNIT
NO
CONTROL PANEL,
D3012, D3011
YES
LOW
CHECK IC301,
PWA BLOCK
HIGH
NG
CHECK IC301,
CP1 DMA BLOCK
OK
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