5.2 Maintenance Flow chart
Start
Confirm if AC is compatible with
the DVD-Player require
Replace extainal
PSU or a
transform need
Power on
Voltages
in all pins of item 1601 are
normal?
1. Check Cable
2. Replace PSU if Mono PWB is not short, otherwise find out
where short first
Are
DV33 and V25
normal?
Check regulator LD1117 (item7601) and diode 1N4002 (item6604)
and peripheral circuit
Display LOGO?
Is
Main Clock
normal?
1. Check oscillation circiut.
Is
reset signal
normal?
1. Check reset circiut.
Is
signal on FLASHl
normal?
Is
signal on SDRAM
normal?
Is input
signal of TV encoder
normal?
Is output
signal of TV encoder
normal?
Check the circuit of video
filter, amplifying and cables
with TV
Check peripheral circiut of FLASH
Check peripheral circiut of SDRAM
Check peripheral circiut of TV
Encoder
Check peripheral circiut of TV
Encoder
A
Yes
No
Yes
No
Yes
No
Yes
No
Y
N
Y
N
Y
N
Y
N
Y
N
Y
N
Summary of Contents for DVD 691
Page 5: ...3 Directions for User 5 ...