Yamaha cdv 870

Page 1

CD CDV LD PLAYER

C DV-87O

SERVICE MANUAL

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COMPACT

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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, destmction of expensive components, and failure of the
product to perform as specified. For these reasons, we advise all YAMAHA product own-
ers that any service required should be 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
authorization, certification or recognition of any applicable tcciuiicttl capabilities. or
establish a principle-rtgent relationship of any Ionn.

The data provided is believed to be accurate and applicable to the utlit(s) indicated on the cover. The res-each,
engineering, and service departments of YAMAHA are continually striving to improve YAMAHA products.
Modifications are. therefore, inevitable and specifications are subject to change without notice or obligation to
retrofit. Should any discrepancy appear to exist, please contact the distributors 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 cottltecl to this buss).

IMPORTANT: Tum the unit OFF during disassembly and part replacement, Recheck all work before you

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apply power to the unitl
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I CONTENTS

TO SERVICE PERSONNEL .......... .......1 IC DATA 19~26
REAR PANELS ........................ . ........ ..... ....2 DISPLAY DATA
INTERNAL VIEW .. 2 BLOCK DIAGRAM .............

SPECIFICATIONS .. 3 PRINTED CIRCUIT BOARD .

DISASSEMBLY PROCEDURES 6 IC BLOCK. ................

TEST MODE ............ ..7 SCHEMATIC DIAGRAM .......... .....35~41
ERROR MESSAGE . PARTS LIST 42~57

ADJUSTMENTS
TEST DISC

REMOTE CONTROL TRANSMITTER .

.58

YAMAHA

YAMAHA CORPORATION
P.O.Box1.HamamalsutJaDan

1.8K~869 IE 6) Printed in Japan 93.5

0L8'ACIO

Page 2

CDV-870

I TO SERVICE PERSONNEL

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

2. Leakage Current Measurement (For 120V Models Only). ® :3
When service 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 SpF.

o Leakage current must not exceed 0.5mA.

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

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 pW*

' This output is the value measured at a distance
of 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 WHATSOEVERI

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

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

Page 11

( 8. Confirmation of Tilt Operation

See page 8 tor TP locations
1) Connect a DC voltmeter to the TILT terminal (in
0514) as shown below.

TILT m- DCVM

000000

GND
6814

2) Load a 20cm CAV test disc LD~07 and set to the
PLAY mode.

3) Move the tilt gear by force to cause a DC voltage
to occur at the TILT terminal, and the tilt mecha-
nism returns by the servo function. Check that the

( voltage generated then is OiOAV.

Turn the pulley with a finger.

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FRONT (3:1
9. Y Axis Adjustment
/ See page 8 for TP locations.

l 1) Connect an oscilloscope (X axis) to the E terminal
(in C815) through a filter as shown below.

2) Connect an oscilloscope (Y axis) to the F terminal
(in CB15) through a filter as shown below.

Oscilloscope
(X-Y mod 5)

.

0314 X : 50mV/div
Y : 50mV/div
AC range

3) Set to the TEST mode.
4) Load the CD test disc.
h 5) Set to the CD PLAY mode and set the tracking
servo OFF at the innter circuit of the disc (in about
3 minutes area).

LUV-50

6) Set the oscilloscope to the X-Y mode/AC range
(both X and Y axes) and adjust the Y-axis adjusting
gear so that the phase difference between the E
terminal and the F terminal is 180 degrees. (Be
sure to remove the thread lock before making an
adjustment.)

0 Underslde

Y axis adjusting gear

Spindle motor

7) Set the tracking OFF at the outer circuit of the disc
(in about 60 minutes area).

8) Check that the phase difference between the E
terminal and the F terminal is 180 degrees.

I2