Sherwood CD 5090C Service Manual

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SERVICE MANUAL

CD-5090R/ C/ G

COMPACT DISC PLAYER

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I CONTENTS I
LASER BEAM SAFETY PRECAUTIONS ............ 2 ~ TROUBLESHOOTING ....................................... 15
SAFETY PRECAUTIONS .................................... 3 MECHANICAL PARTS LIST ............................. 22
LEAKAGE TEST .................................................. 4 EXPLODED VIEW ............................................. 23
SPECIFICATIONS ............................................... 5 ELECTRICAL PARTS LIST ................................ 25
WIRING DIAGRAM ............................................. 6 PRINTED CIRCUIT BOARDS ............................ 29
BLOCK DIAGRAM .............................................. 8 ICS FUNCTIONAL BLOCK DIAGRAM ............ 31
CIRCUIT DESCRIPTION .................................... 10 SCHEMATIC DIAGRAMS ................................. 33
PICKUP REPLACEMENT .................................. 13 TRANSISTORS LEAD IDENTIFICATION ......... 35

@ Sherwood ®

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LASER BEAM SAFETY PRECAUTIONS

CLASS 1 LASER PRODUCT

CAUTION
Invisible laser radiation when the unit is
CLASS 1 open. Do not stare into beam.
LASER PRODUCT CAUTION: USE OF ANY CONTROLS. ADJUSTMENT. OFI

PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN
MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.

Do not look directly at the laser beam
coming from the pickup or allow it to
strike against your skin.

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This compact disc player uses a pickup that emits a laser beam. The laser beam is emitted from the
location shown in the figure. When checking the laser diode, be sure to keep your eyes at least 1 foot
away from the pickup lens when the diode is turned on. Do not look directly at the laser beam.

Turntable

Pickup Lens

CAUTION:
Using controls and adjustment, or doing procedures other than those specified herein, may result in

hazardous radiation exposure.