Yamaha gx 50

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MINI COMPONENT SYSTEM

This system is composed of GX-So electronics module and 1 pair of NX-GX50 loud speakers.

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IMPORTANT NOTICE \

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are
Already known and understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in
personal injury, destruction of expensive components, and failure of the product to perform as specified
For these reasons, we advise all YAMAHA product owners that any service required should he performed

by an authorized YAMAHA Retailer or the appointed service representative

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authotimtion, certifica-
tion or recognition of any applicable technical capabilities. or establish a principle-agent relationship

of any form.
The data provided is believed to be accurate and applicable to the unitts) indicated on the cover. The research, engineering. and
service departments of YAMAHA are continually striving to improve YAMAHA products Modificltions are, therefore.
inevitable and specifications are subject to change without notice or obligation to retrofit Should any discrepancy appear to

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I CONTENTS

TO SERVICE PERSONNEL
FRONT PANELS ..................
REAR PANELS
SPECIFICATIONS
INTERNAL VIEW
DISASSEMBLY PROCEDURES
VOLUME RANGE ...................
SYSTEM CONNECTOR CHECK
TEST PROGRAM MODE .
CD TEST MODE ...........
CD STANDARD OPERATION CHART

exists please contact the distributor's Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may have
accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this
buss).

IMPORTANT: Tum the unit OFF during disassemhly and part l'cpIaCemenL Recheck all work before you apply power to the
unit.

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CD ERROR MESSAGES
ADJUSTMENTS t
IC DATA
PIN CONECTION DIAGRAM .
PRINTED CIRCUIT BOARD ..
BLOCK DIAGRAM
SCHEMATIC DIAGRAM .
PARTS LIST ....................
REMOTE CONTROL TRANSMITTER
APPLY GREASE PICTURE
NX-GX50 .............................

YA

EWHAIEORPORA ION
. . x1. amamatsu, apan
2.1K<7131 @Qolrinted in Japan 96.8.

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(ix-50

I TO SERVICE PERSONNEL

1. Critical Components Information AC LEAKAGE
Components having special characteristics are marked and WALL EQUIPMENT TESTER on
must be replaced with parts having specifications equal to OUTLET UNDER TEST EQUIVALENT
those originally installed.

2. Leakage Current Measurement (For 120V Models Only). ® :D
When sen/ice has been completed, it is imperative to verify I
that all exposed conductive surfaces are properly insulated =
from supply circuits. INSULATING

TABLE

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.1 site

0 Leakage current must not exceed 0.5mA.

0 Be sure to test for leakage with the AC plug in both
polarities.

CAUTION"
.3 E501 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE 2.0A, 125V FUSE."
VALV "F502 : FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE T3.15A, 125V FUSE."

CAUTION
F501 : REPLACE WITH SAME TYPE 2.0A, 125V FUSE.
F502 : REPLACE WITH SAME TYPE T3.15A, 125V FUSE.

ATTENTION
F501 : UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE 2.0A, 125V.
F502 2 UTILISER UN FUSIBLE DE RECHANGE DE MEME TYPE DE T8.15A, 125V.

CAUTION : USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

THE COMPACT DISC PLAYER SHOULD NOT BE ADJUSTED OR REPAIRED BY ANYONE EXCEPT PROPERLY
QUALIFIED SERVICE PERSONNEL.

PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

This set employs a laser, Therefore, be sure to carefully
follow the instructions below when servicing .

1. Laser Diode Properties 2. When checking the laser diode emission, keep your
0 Material : GaAlAs eyes more than 30 cm away from the objective lens.
0 Wavelength : 780 nm
0 Emission Duration :Continuous
0 Laser Output : max. 44.6 uW

* This output is the value measured at a distanceof
about 200 mm from the objective lens surface on
the Optical Pick-up Block.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic
and/or plastic (where applicable) components may also contain traces of chemicals found by the
California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects
or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH
FOR ANY REASON WHATSOEVER!

Avoid prolonged, unprotected contact between solder and your skin! When soldering, do not inhale
solder fumes or expose eyes to solder/flux vapor!

If you come in contact with solder or components located inside the enclosure of this product, wash
your hands before handling food.