Rotel RCD 865BX Service Manual

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TECHNICAL MANUAL

HOTEL

RCD-BGSBX

COMPACT DISC PLAYER

TABLE OF CONTENTS

Safety Caution ............................................ 1
Chassis Layout ....................................... 2
PC Board Assy Parts List ................................ 3
Wiring Diagram ................... ...5
Printed Circuit Boards... ...... 6
Schematic Diagram ....... ..11
Disassembly Diagram ............ . ................. 15

THE HOTEL CO" LTD.

1 36 8 OHOKAYAMA. MEGURO KU TOKYO 52. JAPAN

HOTEL ELECTRONICS CO" LTD.

ROTEL BLDG 3F NO 35. FUSING N ROAD TAIPEL TAIWAN. REPUBLIC or CHINA MN20001822

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PROTECTION OF EYES FROM LASER BEAM DURING SERVICING

THIS SET EMPLOYS A LASER. THEREFORE, BE SURE TO
FOLLOW CAREFULLY THE INSTRUCTIONS BELOW WHEN
SERVICING.

WARNINGII

WHEN SERVICING. DO NOT APPROACH THE LASER EXIT
WITH THE EYE TOO CLOSELY, IN CASE IT IS NECESSARY
TO CONFIRM LASER BEAM EMMISION. BE SURE TO
OBSERVE FROM A DISTANCE OF MORE THAN 1300!" FROM
THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL
PICK-UP BLOCK.

LASER WARNING LABEL

THE LABEL SHOWN BELOW ARE AFFIXED.

WARNING LABEL

CAUTION
INVISIBLE LASER RADIATION WHEN OPEN
DO NOT STARE INTO BEAM

DANGER
INVISIBLE LASER RADIATION WHEN OPEN
AVOID DIRECT EXPOSURE To BEAM

ALIGNMENT PROCEDURE FOR THE LASER CURRENT AND THE FOCUS OFFSET

NOTE 1. This alignment must be done only if or the monoboard or the CDM
is replaced for service purpose.

NOTE 2. The given measurement data are only for alignment after service.
when checking monokits for these data, different values can be
found. This is normal and gives no reason for malfunction.

NOTE 3. The used test disc must be 3 SONY type 4 (YEDS 18).
A. Turn the laser variable resistor R302 in a position that the
total resistance of R302 plus R135 is 1 kohm.
Turn the focus variable resistor R301 in the middle position.

8. Switch the power ON and verify that the display light up.

C. Place the test disc in the tray. The test disc must be clean
(no finger prints) and may not be damaged.

D. Connect a DC voltmeter over resistor R115, switch the power on,
press the PLAY button and check the reading of the DC voltmeter.

E. While the monokit is playing, adjust the laser current with
variable resistor R302 at a value of 50 mV */-2 mv.

F. Switch the power off and connect a DC voltmeter over capacitor
C135, switch the power on, press the PLAY button and check the
reading of the DC voltmeter.

G. While the monokit is playing, adjust the focus offset with
variable resistor R301 at a value of 400 mV +/-20 mV.

REMARK: It is normal that the focus readout is not stable, but is
varying within certain range.