Jvc RC 656 LB Service Manual

Page 2

No. 1422

RC-656L/LB

Contents

Page
Specifications .............................. 2
Features ........................... . .3
Names of Parts ............................ 3
Removal of Main Parts ..................
Removal of Cassette Mecha Parts ................. 5
Adjustment of Cassette Recorder ................. 6
How to Engage Dial Cord ...................... 7
Adjustment of Cassette Recorder Amplifier .......... 8
Tuner Alignment ...................... . . . .9
Block Diagrams ............................ 12
Schematic Diagram (Tuner Circuit) ............... 13
Schematic Diagram (Amplifier Circuit) ............ 14
Wiring Connection .......................... 15

Specifications

:9 le (including 2 for the micro
phone and 1 for the motor)
33 transistors & 1 FET

Semiconductors

Speakers : 16 cm (3. 2 Q) X 2,
5 cm (4 Q) x 2

Tuner section

Frequency ranges : FM 88 - 108 MHz
SW 6 - 18 MHz

MW 540 - 1600 kHz
LW 150 - 350 kHz

: Telescopic antenna for SW & FM
Ferrite core antenna for MW &
LW

Antennas

Tape recorder section
Track system
Frequency response

: 4-Track 2-channel stereo

2 30 - 15,000 Hz
(with chrome tape)
30 14,000 Hz
(with normal tape)

:0.12% (WRMS)

: 50 dB,
The S/N ratio is improved by 5
dB at 1 kHz and 10 dB at 5 kHz
or above with DOLBY N.R.
switch 0N.

Wow 81 flutter
S/N ratio

Page

Mechanical Component Parts ................... 16
Mechanical Component Parts List .............. 17
Assembly Parts ............................ 18
Assembly Parts List ....................... 18
Amplifier P.W. Board Parts .................... 21
Amplifier P.W. Board Parts List ............... 22
Tuner P.W. Board Parts (Power Supply, Motor) ....... 25
Tuner P.W. Board Parts List .................. 26
Power Supply P.W. Board Parts List ............ 28
Packing ................................. 29
Packing Material Parts List .................. 29
Accessories ............................... 29

Rewind time
Fast forward time

: Within 110 sec. (C-60 cassette)
: Within 110 sec. (0-60 cassette)

Amplifier section
Power output
Input jacks

:Max. 12W (6W+6W) at 3.2 Q
: Mic x 2
(0.8 mV, low impedance)
: Ext. speaker x 2
(load impedance 4 - 8 Q)
Headphones x 1
: DIN jack
: DC 12 V
(8 R20 (U2)" batteries)
Car battery (DC 12 V)
AC 240/220/110 V, 50/60 Hz
Power consumption : 19 W
Dimensions :468(W) x 247(H) x 125 (D) mm
Weight : 5.2 kg (without batteries)
5.9 kg (with batteries)

Output jacks

Input/output jack
Power supply

Design and specifications subject to change without notice.