Check the condition of the input power &cable connection.
(JP730,JP701(DTT&Analog, JP709(Digital),JP230(AMP))
Check the condition of on-board regulators.
Check for short circuits between each power terminal and the ground.
1. No Power
Preliminary Checkpoints
#3(Power)
at JP730
In digital Board
#1(M-7V)
at JP730
In Digital B/D
No Power
When Powered ON
#5(POMUTE)
at JP730
In digital Board
#74,75
at U29
in digital B/D
The signal waveform
of X3
in digital B/D
The data line waveform
of U28
Change Digital B/D
Waveform 1
Waveform 2
Waveform 3
Waveform
4,4 - 1
Waveform 5
Waveform
6,6 - 1
Check SMPS
Check SMPS &Micom
Block(U29)
Check SMPS &Power Line
in Digital B/D
Check the state of soldering
in U401,U800,U29
Check the input power
part in U29
Check the U28 and
related Circuit
NG
NG
NG
NG
NG
NG
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