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Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656


Model: KV-27V55 No. 253
Subject: Part Number of the Circuit Board Date: June 23, 1995


Symptom:
() This model is using different versions of the circuit board. When ordering a
replacement board, please check serial number of the unit and chart below to
match the correct part number.

Serial Number and Substitution Chart

Serial Number 70000017000051 70000527085106 7085107 and above
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AA AA
A
Board Name Part Number Part Number Part Number

A Board A-1297-065-A A-1297-065-A A-1297-432-A
(A-1297-432-A) (A-1297-432-A) (A-1297-065-A)

U Board A-1394-418-A A-1394-418-A A-1394-418-A
(A-1394-562-A) (A-1394-562-A) (A-1394-562-A)

H Board A-1371-883-A A-1371-883-A A-1370-020-A

D Board A-1346-116-A A-1346-116-A A-1346-205-A

M Board A-1306-427-A A-1306-427-A A-1306-474-A
(A-1306-434-A) (A-1306-434-A)

P Board A-1195-062-A A-1195-062-A A-1195-062-A

C Board 1 1 A-1331-353-A
A-1331-270-A A-1331-314-A

Example: If two part numbers are listed in the same column, the upper number is
original part number and bottom is the substitution number.

If you have a model of serial number 7000052 and requires an M board, you
can use A-1306-434-A instead of original board A-1306-427-A.
If you need D Board for a model of Serial number 7000052, please use A-1346-
116-A (original part number only).

Note 1: Please refer to the other Service Bulletin #194, New C board with no H-STAT
control.


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