3-5
FWD-50PX3
3-5. Power (G Board) Trouble
Power cannot be turned on.
Yes
No
Is LED reset repeatedly?
Yes
Yes
No
No
Replace the CTRL board.
No
Is there any abnormal state in
the connection between the
G board and A board.
Is the G board abnormal? (
*
)
Is the A board abnormal?
.
Check where is short pattern.
.
Re-on (pin 2 of P701 on the
A board): High 1 V.
.
Vs-on (pin 7 of P701 on the
A board): High 1 V.
(
*
)
Normal state
.
5 Vst (Stand by 5 V, pins 3, 4 of P701 on the A board):
5 V
.
AC-DET (pin 1 of P701 on the A board):
5 V
.
Re-on (Relay-on switching signal, pin 2 of P701 on the A board): High 1 V
.
Vs-on (Vs-on signal, pin 7 of P701 on the A board):
High 1 V
There is a high possibility that
the A board caused the trouble.
→
Replace the A board.
Yes
No
Is there any trouble in AC power
cable or line filter cable?
Identify the trouble portion and
improve it.
Replace the G board.
Yes
Replace the A board.
Connect correctly.
n
After replacing the A board, perform the following
adjustments.
.
AD calibration adjustment (Refer to Section 2.)
.
White balance adjustment (Refer to Section 2.)
.
EDID data input
.
S-Init Goods (Refer to Section 2.)
n
After replacing the A board, perform the following
adjustments.
.
AD calibration adjustment (Refer to Section 2.)
.
White balance adjustment (Refer to Section 2.)
.
EDID data input
.
S-Init Goods (Refer to Section 2.)
n
After replacing the G board, perform
the following adjustments.
.
Va Voltage Adjustment (Refer to Section 2-3.)
.
Vs Voltage Adjustment (Refer to Section 2-3.)
n
For the replacement parts, refer to Section 6.
The parts other than those described in Section 6 are
not service parts. When the replacement of those parts
is required, replace them in the assembly unit.
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Page 135: ...Printed in Japan Sony Corporation 2007 9 22 2007 FWD 50PX3 SY E 9 968 367 01 ...