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Hi-Fi Products CSA-13
Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656
Model: STRGX800ES No. 418
Subject: No Sound with 'Tape Monitor' mode while receiving Date: November 30, 1994
a Radio Broadcast . Applicable S/N range, until ~
#806,508
Symptom:
(**) No Sound in 'Tape Monitor' mode while receiving a Radio Broadcast. This is due to a
Microprocessor software bug.
Solution: Add the following circuit between IC201 (Micro) and the FM/AM tuner pack (FE201).
QTY DESCRIPTION PART NUMBER
1 DTC-114ES* 8-729-900-80
1 1N41487M 8-719-987-63
2 1K OHM 1/4 W 1-249-417-11
1 JUMPER WIRE 90MM
* A 2SC-3420 CAN BE USED FOR
THIS MOD
See diagram on back of S/B for installation procedure.
1.) Remove JW361 and mount a 1K resistor in its place. (Designate this resistor R1).
2.) Mount the DTC-114ES base lead to the JW360 pattern land. (See diagram)
3.) Mount the other 1K resistor (Designate R2) between the collector of the DTC-
114ES and ground. The transistors collector lead and resistor R2 should now be
soldered to the other side of R1 , which is already mounted in place of JW361. (See
diagram)
4.) Cut the pattern land of the #3 pin of CNP201. Mount the 1N4148M diode between
the emitter of the DTC-114ES (Anode to transistor, Cathode to land) and the isolated
land of the cut foil pattern. (See diagram).
5.) Mount the 90MM jumper wire between the cathode of the diode 1N4148M and pin
#21 of the FM/AM Tuner Pack, FE201. (Continued)
Reference: Japan Fax # 3-3458-7571 PRINTED IN USA
Autoflagged - YES
PRINTED ON RECYCLED PAPER
Hi-Fi Products Service Bulletin No.418
Hi-Fi Products Service Bulletin No.418
Filename: HFP0418.SB
Directory: J:\SBDOC\NOV94
Template: C:\WINWORD\S_BULL.DOT
Title: Modification of STRGX800ES
Subject:
Author: Hoyt Wing Lee
Keywords:
Comments:
Creation Date: 11/30/94 1:36 PM
Revision Number: 2
Last Saved On: 11/30/94 1:36 PM
Last Saved By: Hoyt Wing Lee
Total Editing Time: 1 Minute
Last Printed On: 04/01/96 10:05 AM
As of Last Complete Printing
Number of Pages: 3
Number of Words: 272 (approx.)
Number of Characters: 1,556 (approx.)
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