Power (G Board) Trouble - Sony FWD-42PV1 Service Manual

3-4. Power (G Board) Trouble

Power cannot be turned on.
Is LED reset repeatedly?
No
Is the connection of the A board
abnormal?
No
Is the G board abnormal?
No
Is the CTRL board abnormal?
3-4
n
For the replacement parts, refer to Section 4.
The parts other than those described in Section 4 are
not service parts. When the replacement of those parts
is required, replace them in the assembly unit.
There is a high possibility that
Yes
the A board caused the trouble.
→ Replace the A board.
Connect correctly. If the trouble
Yes
persists, replace the A board.
Yes
Replace the G board.
Yes
Replace the CTRL board.
n
After replacing the parts, 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 parts, 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.)
FWD-42PV1/42PV1P/42PV1A