Sony HDW-750 Maintenance Manual page 483

Procedure
Perform NVRAM adjustment.
. RP-127 board : Refer to Section 1-17-16.
. RP-123 board : Set the S1-1 on the RP-123
board to ON, turn OFF/ON
the power. Then, turn OFF
S1-1 on the RP-123 board.
Perform manual RPN concealment.
(Refer to Section 9-33-1.)
Is RPN corrected?
YES
If RPN remains still visible, perform
AUTO BLACK BALANCE adjustment
(keep pressing AUTO W/B BAL switch to BLK
position), or perform manual RPN concealment
once again. (Refer to Section 9-33-1.)
Correction works.
HDW-750/750CE V1
There remains an RPN that cannot be corrected
by the manual RPN concealment.
(Refer to Section 9-33-1.)
Perform AUTO BLACK BALANCE adjustment
(keep pressing AUTO W/B BAL switch to
BLK position) six times.
Does RPN disapper?
NO
Push the SHUTTER switch at the front
to set the shutter to 1/2000.
YES
Is RPN level lowered?
As a result of
NO
the adjustment,
does RPN disappear?
YES
Correction works.
NO
RPN cannot be corrected due to
adjacent RPN.
Replace CCD block.
YES
Correction works.
NO
Perform RPN adjustment.
. RP-127 board : Perform BLACK OFFSET
adjusetment.
(Refer to Section 9-6-1)
. RP-123 board : Perform RP-123 board RPN
adjustment.
(Contact your local Sony Sales
Office/Service Center.)
YES
Can the adjustment be
performed correctly?
Check the connectors used between
DR-433/477 and TG-219/219A boards, and
also TG-219/219A and PA-253/282/282A boards.
Replace flexible wire cable used between
DR-433/477 and DCP-28/28B boards.
Perform RPN adjustment once again.
Can the adjustment be
YES
performed correctly?
One or more of DCP-28/28B,
RP-123/127, DR-433/477, TG-219/219A,
PA-253/282/282A is defective.
Replace one board at a time to identify the
defective board.
9-33. RPN Concealment
NO
NO
9-33