Maintenance Flow Chart - Yamaha DVD-S540 Service Manual

DVD-S540/DV-S5650
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MAINTENANCE FLOW CHART

Start
Power on
Voltages
at all pins of connector (Ref 1601)
are normal ?
Yes
Are
DV33 and V25
normal ?
Yes
Display LOGO ?
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L 13942296513
Yes
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1. Check Cable
No
2. Replace Power Supply Unit if Mono Board is not shorted,
otherwise find out first where the short is.
No
Check LD1117 (Ref 7601) and 1N4002 (Ref 6604) and
peripheral circuit.
Is
No
Main Clock
normal ?
Yes
Is
reset signal
normal ?
Yes
Is signal
on FLASH (item 7611)
normal ?
Yes
Is signal
on SDRAM (item 7609)
normal ?
Yes
Is input
signal of TV encoder
normal ?
Yes
Is output
signal of TV encoder
normal ?
Yes
Check the circuit of video
filter, amplifying and cables
with TV
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2 9
8
No
Check oscillation circuit.
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3 6 7 1 3 1 5
No
Check reset circuit.
No
Check peripheral circuit of FLASH (Ref 7611)
No
Check peripheral circuit of SDRAM (Ref 7609)
Check peripheral circuit of TV
No
Encoder
Check peripheral circuit of TV
No
Encoder
co
.
9 4 2 8
0 5 8 2 9 9 4 2 8
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9 9
9 9