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Car Stereo CSA-14
Service Bulletin
Sony Service Company - Technical Services
A Division of Sony Electronics Inc.
Sony Drive, Park Ridge, New Jersey 07656
Model: EXR-15, XR-2500 No. 393
Subject: Improving Display Readability. Date: April 4, 1996
Symptom:
(13) The display may be difficult to read under some conditions in certain installations.
Solution: If the customer complains of this problem, implement the countermeasures shown
below. Please note that the specific countermeasures are dependant upon the
serial number of the unit being repaired.
REF FORMER NEW
DESCRIPTION PART NUMBER DESCRIPTION PART NUMBER
9 PLATE, LIGHT 3-909-885-01 PLATE, LIGHT 3-935-089-01
GUIDE GUIDE
R373 RESISTOR, 15 1-249-395-11 RESISTOR, 10 1-249-393-11
OHM OHM
R374 RESISTOR, 47 1-249-401-11 RESISTOR, 10 1-249-393-11
OHM OHM
R372 RESISTOR, 47 1-249-401-11 NONE
(OLD OHM
MCB)
R372 RESISTOR, 12 1-249-394-11 0 OHM
(NEW OHM JUMPER WIRE
MCB)
Procedure A (for EXR-15 up to serial number 500900 and XR-2500 up to
serial number 525300):
1- Replace the light guide assembly, ref. 9 with an improved type.
2- Change R373 from 15 ohms to 10 ohms.
3- Change R374 from 47 ohms to 10 ohms. (Continued)
4- Remove R372 (there is no marking on the board for this
resistor. It is mounted to the same feedthroughs as R374, but on the opposite side of
Reference: Technical News ME-95028 Revised PRINTED IN USA
PRINTED ON RECYCLED PAPER
Car stereo Products Service Bulletin No. 393
the board).
Procedure B (for EXR-15 serial number 500901 and higher and XR-2500
serial number 525301 and higher):
1- Replace the light guide assembly, ref. 9 with an improved type.
2- Change R373 from 15 ohms to 10 ohms.
3- Remove R372 and replace it with a 0 ohm jumper wire.