Panasonic rq sx 79 gk service manual

Page 1

TD0502007C3

rvice Manual

Specification
nGeneral
Power Requirement:

Battery; DC 1.5V (one R6/LR6,"AA"

battery)

DC 1.2V with an included
Panasonic Rechareable Battery
(RFKFHFAZO1EM) x1

6.5mW+6.5mW (RMS...max)
Headphone;1BQ,M3 jack

75.0 x 108.8 x 19.0mm

157g (With rechargeable battery)

Rechargeable Battery;

Power output:
Output jack:
Dimensions(WxHxD):
Weight:
nCharger

Input;

For (GK) area;
For (GD) area;
Output;

Wow & Flutter;
nCassette Player

AC 220V,50HZ,4 W
AC 220V,60HZ,4 VA
DC 1.2V,350mA
WRMS 0.28%

Mini Cassette

RQ-SX7QGK
RQ-SX7QGD

Stereo Cassette Player

Colour
(8) ............ Silver Type
(A) ............ Blue Type

AR10 Mechanism Series

4 track, 2 channe|,stereo
40~18,000HZ (-6 dB)
About 5 hours

Track system:
Frequency Range (Normal)
Recharging time:

Motor: Electrical governor motor
Tape Speed: 4.8 cm/s
Playing time:

(When used in hold mode, at 25°C and on flat stable surface)
Battery (»ies) Tape playback
About 31.5 hours

About 52 hours

About 84 hours

Rechargeable battery 1
Alkaline battery
Rechargeable
Alkaline battery
1 When the included rechargeable battery is fully recharged (5 hours
required)

Note:

Specifications are subject to change without notice.

Mass and dimensions are approximate.

The play time may be less depending on the operating conditions.

battery *1 and

AWARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

CONTENTS

Page Page

1 Accessories ---------------------------------------------------------------------------- 2 2 Location of Controls --------------------------------------------------------------- 3

Panasonic

© 2005 Matsushita Electric TAIWAN Industrial Co.,
Ltd. All rights reserved. Unauthorized copying and
distribution is a violation of law.

Page 2

RQ-SX7SGK l RQ-SX7SGD

3 Service Mode .......................................................................... 4
3.1. Unit and Stereo Earphones Test ..................................... 4
3.2. Remote Controller Test .....................

4 Mechanism Block Replacement Procedure

4.1. Replacing the tape transport assembly --------------------------- 5
4.2. Replacing the head block assembly -------------------------------- 5
5 Operation Checks and Component Replacement Proceduress
5.1. Checking for the main P.C.B. ------------------- -6
52. Replacement for the motor and capstan belt -7

5.3. Replacement for the intermediate ornament (A),
intermediate ornament (B), intermediate ornament (C) and
open knob ass D ----------------------------------------------------------- 8

5.4. Replacement for the head block ass |]

6 Notice for assembling the rear cabinet ass |] -

7 Block Diagram ..............................................

1 Accessories

- Stereo earphones
(LOBABOOOO181) ............................................................. 1pc.

- Remote Control
(RFEV033P-SS) ............................................................. 1pc.

- Battery Charger Stand
(RFEB118T-2U) .............................................................. 1pc.

[GK] ONLY

- Battery Charger Stand

(RFEB121Q«S) 1pc.

[GD] ONLY

8 Check Point of Signal ........................................................... 11
9 Schematic Diagram Notes .................................................... 11

10 Schematic Diagram ............

11 Printed Circuit Board Diagram

12 Type Illustration of ICs, Transistors and Diodes .................. 13
13 Measurements and Adjustments .......................................... 13
13.1. Adjustment Instructions ................................................ 18

13.2. Adjustment Points
14 Terminal Function Of IC D

15 Supply of Rechargeable Battery as Replacement Parts- 19
16 Caution in USE of Rechargeable Battery ------------------------------- 1g
17 Mechanism Parts Location ................................................... 20

18 Cabinet Parts Location-
19 Packaging --

20 Replacement Parts List

- Stand Charger Holder

(RKQT0022-A) ................................................................ 1pc,

Q

- Battery Ass'y
(RFKFHFAZO1 EM) .....

I

k,

x __________________ ,z
- Battery Case

(RFCTOOOS-H) ............................................................... 1pc.
- Battery Case

(RFATOOOZ-H) ................................................................ 1pc.

@