DVD-S30
17
DVD-S30
■
MAINTENANCE FLOW CHART
Start
Connect the power cable
to the AC outlet
Are power
supply voltages at
W101,102 on PCB AV
normal ?
Power ON
Check the cable connected from power supply unit to
AV board.
Replace Power Supply Unit if each line was not shorted
in PCB AV, otherwise find out where it is shorted.
Are each
power supply voltage
normal ?
Check power supply control circuit.
P-CONT (W104 pin No.5) should be 'L'.
Check if each switching transistor (Q106,108,142)
function correctly.
Are correct
characters displayed
on FL ?
Check control signal for FL driver IC (IC1 on PCB
OPERATION).
Check filament voltages.
Does BGV
appear on monitor
correctly ?
Check if video signal is output from MONO board.
Check video signal path on PCB AV if it is output,
otherwise check MONO board.
MAIN Clock 27MHz Crystal (Ref 5211)
Reset circuit NCP303 (Ref 7104)
FLASH ROM (Ref 7303)
SDRAM (Ref 7302)
MT1389 (Ref 7209)
Are signals
TROUT(pin3 of 1203)
& TRIN(pin5 of 1203)
correct ?
Check the position-switch on the
DVD mechanism.
Are signals
LOAD+(pin2 of 1203)
& LOAD-(pin1 of 1203)
correct ?
Check AM5888 and peripheral
circuit.
Check the circuit connected
to DVD mechanism.
A
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
No
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TEL 13942296513 QQ 376315150 892498299
