Sharp cd pc 672 service manual

Page 1

CD-PC672

SHARP SERVICE MANUAL

No. S4915CDPCG72/

CD-PC672

CD-PC672 mini component system consisting oi CD-PC672 (main
unit), CP-CB72 (from speakers), CP-SWG72 (sub woofer),
GBOXSOOZZAWMI (center speaker) and GBOXSOOZSAWMI (rear
speaker).

[flfigfi

DIGITAL AUDIO
- In the interests of user-safety the set should be restored to its
D_ original condition and only parts identical to those specified be
PRO-LOGIC used.

Manufactured under license from Dolby Laboratories Licens-
ing Corporation

DOLBY, the double»D symbol DC] and "PRO LOGIC" are
trademarks of Dolby Laboratories Licensing Corporation.

/- CONTENTS -\

IMPORTANT SERVICE NOTES (For USA. Only) ..
SPECIFICATIONS.
NAMES OF PARTS
OPERATION MANU
QUICK GUIDE I
DISASSEMBLY
REMOVING AND REINSTALLING THE MAIN PARTS ..
ADJUSTMENT ...................................
NOTES ON SCHEMATIC DIAGRAM
BLOCK DIAGRAM .............................
SCHEMATIC DIAGRAM / WIRING SIDE OF P.w.BOARD
VOLTAGE ...........................................................................
WAVEFORMS OF CD CIRCUIT ...........
TROUBLESHOOTING (CD SECTION)
FUNCTION TABLE OF IC.
FL DISPLAY ......................
REPLACEMENT PARTS LIST/EXPLODED VIEW
PACKING OF THE SET (For USA. Only)

-
This document has been published to be used

SHARP CORPORATION for after sales service only.

The contents are subject to change without notice.

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CD-PC672

TO THE OPERATION MANUAL.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER

IMPORTANT SERVICE NOTES (For U.S.A. Only)

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard)

Before returning the audio product to the user, perform the

following safety checks.

1. Inspect all lead dress to make certain that leads are not
pinched orthat hardware is not lodged between the chassis
and other metal parts in the audio product.

. Inspect all protective devices such as insulating materials,
cabinet, terminal board, adjustment and compartment covers
or shields, mechanical insulators etc.

. To be sure that no shock hazard exists, check for leakage
current in the following manner.

Plug the AC line cord directly into a 120 volt AC outlet.
Using two clip leads, connect a 1.5K ohm, 10 watt resistor
paralleled by a 0.1 SuF capacitor in series with all exposed
metal cabinet parts and a known earth ground, such as
conduit or electrical ground connected to earth ground.
Use a VTVM or VOM with 1000 ohm per volt, or higher,
sensitivity to measure the AC voltage drop across the
resistor (See diagram).

Connect the resistor connection to all exposed metal parts
having a return path to the chassis (antenna, metal cabinet,
screw heads, knobs and control shafts, escutcheon, etc.)
and measure the AC voltage drop across the resistor.

¢$

VTVM
-OAC SCALEO-

1 .5k ohms
1 OW

0,15uF

TEST PROBE
TO EXPOSED CONNECT TO
METAL PARTS KNOWN EARTH
GROUND

All check must be repeated with the AC line cord plug connection
reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp.
AC.) or more is excessive and indicates a potential shock
hazard which must be corrected before returning the audio
product to the owner.