Hitachi P50S601/DW3F, Руководство по обслуживанию

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4.5 FAILURE ANALYSIS PROCEDURE
4.5.1 "No Picture” failure analysis procedure
The entire screen does not light.
PSU board STBY
(5V) exists?
Y
N
Y
Turn off the AC power.
Remove the following five power connectors
CN68, CN26 (X-SUS), CN32 (Y-SUS)
CNR3 (ABUSR), CNL 2 (ABUSL)
Turn off AC power.
Connect CN68 to LOGIC.
Turn on AC power
Remove CN68 and CN64
(on PSU Board)
PSU to LOGIC and X-SUS
N
Y
Turn off the AC Power,
End of analysis
STANDBY power supply
has abnormality
STANDBY power supply (MPU)
power supply system has
short-circuit.
Y
Switching circuit
(Power Supply) has a short-circuit.
X-SUS board
CN23 (3)-(4) pins or
CN23 (8)-(6) pins or
CN22 (10)-(13) pins
(1)
Turn on AC Power
X-SUS - Y-SUS
X-SUS to PSU
Logic PWB
defective.
PSU board is
defective.
X-SUS board is
defective.
N
37
Main Power is turned Off
Pin 1 CN63
PSU board STBY
(5V) exists?
Pin 1 CN63
are shorted?
PANEL TROUBLESHOOTING FLOWCHARTS (50AF1) PANEL:
13
[XSUS - YSUS]
Vu
NC
Vcc
-Vs
-Vs
NC
GND
1
Vs
12
11
10
9
8
7
6
CN22
4
3
2
5
NC
GND
NC
Vs
NC
10
[XSUS - PSU]
2
5
GND
GND
Vcc
NC
GND
Vs
1
Va
9
8
7
6
4
3
CN23
Vs
NC
Vs
XSUS
A
N
A
L
Y
S
I
S
O
P
E
R
A
T
I
O
N