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CONFIDENTIAL CSV-1
Sony Service Company
National Technical Services Service Bulletin
A Division of Sony Electronics Inc.
Park Ridge, New Jersey 07656 TV Products
Model: KV-32XBR400, KV-36XBR400 No. 514
Subject: Different Versions Of B-board And HB-board Date: December 11, 2000
Used In Production. Picture From VIDEO-2
Input Will Be Too Bright Or Too Dark If Old
Version Is Connected To New Version.
Symptom:
(F325) There are 2 versions of B-board and 2 versions of HB-board. After replacing the B-
board or the HB-board the picture displayed from a source connected to the VIDEO-2
input will be too bright or too dark if the board that was installed in the set is not the
same version as the board that was removed from the set.
An old version HB-board connected to a new version B-board will result in the
VIDEO-2 picture being too dark.
A new version HB-board connected to an old version B-board will result in the
VIDEO-2 picture being too bright.
As of the date this bulletin was issued, both versions of the HB-board are available as
service parts under their own unique part numbers. However, only the new version
B-board is being stocked as a service part.
The approximate serial number breakpoints between old and new versions is as
follows:
KV-32XBR400 old version: up to 8009113
KV-36XBR400 old version: up to 9017765
Solution: Make sure that the following compatibility is followed when replacing
either the B-board or the HB-board.
IMPORTANT: Refer to the silk-screened part number on the boards to determine the
version. Do not rely on the part number that is stamped on the board! The silk-
screened part number may not agree with the stamped number.
ACCEPTABLE
Old version HB-board (A-1372-835-A) with old version B-board (A-1136-110-A)
New version HB-board (A-1372-904-A) with new version B-board (A-1136-147-A)
UNACCEPTABLE
Old version HB-board (A-1372-835-A) with new version B-board (A-1136-147-A)
New version HB-board (A-1372-904-A) with old version B-board (A-1136-110-A)
Continued on next page......
Reference: Matsuoka E-mail 11/30/00 PRINTED IN USA
AUTOFLAGGED - YES
TV Products Service Bulletin No. 514
As only the new version B-board will be supplied as service parts, you may encounter
a compatibility problem if the set has the old version HB-board. In this case, the old
HB-board can be easily modified to be compatible with the new version B-board, as
follows:
Remove: R4505, R4508, R4510, D4501, D4502, D4504.
Add jumper wire across: C4503, C4506, C4508.
Making old version HB-board compatible with new version B-board
HB-Board
C4508
Add
Jumper D4501
Wire Remove
D4504
Remove
C4503
Add
Jumper
Wire D4502
Remove
C4506
Add
Jumper
Wire
R4510
R4508 Remove
Remove
R4505
Remove