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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-32XBR200, KV-36XBR200 No. 523
Subject: No Audio After Replacing G-Board; G-Board Date: February 2, 2001
Received From WRPC-AS May Not Be
Compatible In TV.
Symptom:
(1510) G-boards received from WRPC-AS might not have the audio 5V regulator
components mounted. In this case, the TV will have no audio.
Solution: When ordering a G-board for the KV-32XBR200 or the KV-36XBR200 be sure to
also order the parts listed below! The solution depends on the 2-digit suffix of the
printed-wiring version silkscreened on one corner of the G-board received from
WRPC-AS.
For printed-wiring versions 1-671-380-21 and lower follow procedure # 1.
For printed-wiring versions 1-671-380-22 and higher follow procedure # 2.
REF DESCRIPTION PART NUMBER
IC651 IC, BA05T 8-759-450-47
R651 RESISTOR 33 OHM, 5%, 3 WATT 1-215-908-00
- HEATSINK FOR IC651 REUSE FROM ORIGINAL BOARD
- SCREW W/ WASHERS REUSE FROM ORIGINAL BOARD
- HEATSINK COMPOUND OBTAIN LOCALLY
Procedure # 1 (for printed-wiring versions 1-671-380-21 and lower):
1- Install the heatsink for IC651. Apply heatsink compound to the heatsink.
2- Install IC651 and R651, then install board in set and check for normal operation.
Procedure # 2 (for printed-wiring versions 1-671-380-22 and higher):
1- Refer to illustration # 2 on the last page. Very carefully use a razor knife to cut the
printed-wiring pattern as shown in the drawing. Make sure there is at least 0.5 mm
space between the patterns after they are cut.
2- Measure the resistance between pins 4 and 5 of connector CN642 to make sure
the pattern was cut completely. The resistance should initially be about 3 megohms,
rising to infinity ohms. A low resistance, or 0 ohms, indicates that the pattern was not
completely cut.
Continued on next page....
Reference: VEA Engineering PRINTED IN USA
AUTOFLAGGED - YES
TV Products Service Bulletin No. 523
3- Install the heatsink for IC651. Apply heatsink compound to the heatsink.
4- Install IC651 and R651, then install board in set and check for normal operation.
Mounting Locations For IC651 And Heatsink, And For R651.
Holes for mounting heatsink.
Holes for
mounting
R651.
Holes for
mounting
IC651.
Illustration # 1
Continued on next page....
TV Products Service Bulletin No. 523
G-board With Printed-wiring Pattern Version -22 And Higher.
Last 2 digits of the top number indicate printed-wiring version. For example,
number 1-671-380-22 indicates version -22 printed-wiring pattern.
Caution: make sure you do
not cut these thin patterns!
Minimum space
between patterns after
Cut the printed wiring pattern as cutting is 0.5 mm.
indicated by the dotted line.
Illustration # 2