Panasonic RQSX-79-GK Service manual

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RQ-SX79GK

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RQ-SX79GD

Stereo Cassette Player

Colour

(S)............Silver Type

(A)............Blue Type

AR10 Mechanism Series

TD0502007C3

Mini Cassette

Specification

nGeneral

Power Requirement:

Battery; DC 1.5V (one R6/LR6,”

battery)

Rechargeable Battery; DC 1.2V with an included

Panasonic Rechareable Battery

(RFKFHFAZ01EM) x 1

Power output: 6.5mW+6.5mW (RMS...max)

Outputjack: Headphone;16Ω,M3jack

Dimensions(WxHxD): 75.0x108.8x19.0mm

Weight: 157g (With rechargeable battery)

nCharger

Input;

For (GK) area;

For (GD) area;

Output; DC 1.2V,350m

Wow & Flutter; WRMS 0.28%

nCassette Playe

C 220V,50Hz,4 W

C 220V,60Hz,4 V

Track system: 4 track, 2 channel,stereo

FrequencyRange (Normal) 40~18,000Hz (-6 dB)

”

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

Rechargeable battery*1

lkaline batter

Rechargeable battery*1 and
Alkaline battery

*1 When the included rechargeable batteryis 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.

bout 5 hours

bout 31.5 hours

bout 52 hours

bout 84 hours

CONTENTS

Page Page

1 Accessories 2

2 Location of Controls

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

3

RQ-SX79GK / RQ-SX79GD

3 Service Mode 4

3.1. Unit and Stereo Earphones Test

3.2. Remote Controller Test

4 Mechanism Block Replacement Procedure

4.1. Replacing the tape transport assembly

4.2. Replacing the head block assembly

5 Operation Checks and Component Replacement Procedures

5.1. Checking for the main P.C.B.

5.2. Replacement for the motor and capstan belt

5.3. Replacement for the intermediate ornament (A),

intermediate ornament (B), intermediat e ornament (C) and
open knob ass 馳

5.4. Replacement for the head block ass 馳

6 Notice for assembling the rear cabinet ass 馳

7 Block Diagram

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11

1 Accessories

· Stereo earphones

(L0BAB0000181) ............................................................ . 1pc.

8 Check Point of Signal 11

9 Schematic Diagram Notes

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10 Schematic Diagram

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11 Printed Circuit Board Diagram

12 Type Illustration of ICs, Transistors and Diodes

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13 Measurements and Adjustments

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13.1. Adjustment Instructions

13.2. Adjustment Points

14 Terminal Function Of IC 痴

15 Supply of Rechargeable Battery as Replacement Parts

16 Caution in Use of Rechargeable Battery

17 Mechanism Parts Location

18 Cabinet Parts Location

19 Packaging

20 Replaceme nt Parts List

· Stand Charger Holder

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

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· Remote Control

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

· Battery Charger Stand

(RFEB118T-2U) ..............................................................1pc.

· Battery Charger Stand

(RFEB121Q-S) .................................................. .............1pc.

· Battery Ass’y

(RFKFHFAZ01EM)............................................................1pc.

· Battery Case

(RFCT0005-H) .............................. .................... ............. 1pc.

· Battery Case

(RFAT0002-H) .......... .................... .................... .............. 1pc.

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2 Location of Controls

OPEN

Main Unit

Volume control

BATT CHK / HOLD
(

(16 )Headphone/Remote

Hold)

RQ-SX79GK / RQ-SX79GD

A-B REPEAT/

S-XBS button

E

F BATT CHK

(Battery life) position

Battery terminal

Remote Control

REW/REV

Volume control

Hold switch

Earphone jack

Main button

Tape OFF/PLAY

Open knob

FF/CUE

Battery lid

Stereo earphones

Plug

Plug

+,- Control

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RQ-SX79GK / RQ-SX79GD

3 Service Mode

3.1. Unit and Stereo Earphones
Test

· Service Mode

The RQ-SX79 has a Service Mode designed to help identify
Faulty parts in the event of an error.

This mode is especially useful when servicing carried out.

· Items Required

1.Stereo earphones.

2.Remote controller.

3.Rechargeable battery or dry cell (R6/LR6,AA,UM-3)
housed in case.

· Service Mode Functions

1.Amplifier test

−

− This test should be run if an amplifier failure occurred

− −

during test 1.above.

· UNit and Stereo Earphones Test Preparations

1.Plug the stereo earphones into headphone jack.

2.Insert a fully-charged rechargeable battery or dry cell
(R6/LR6,AA,UM-3) (housed in battery case).

3.Insert a cassette tape.

4.Release the hold mode.

· Main unit operation switchs location

3.2. Remote Controller Test

· Remote controller operation switchs location

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4 Mechanism Block Replacement Procedure

RQ-SX79GK / RQ-SX79GD

4.1. Replacing the tape transport
assembly

4.2. Replacing the head block
assembly

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RQ-SX79GK / RQ-SX79GD

5 Operation Checks and Component Replacement

Procedures

1. This section describes procedures for checking the
operation of the major printed circuit boards and replacing
the main components.

2. For reassembly after operation checks or replacement,
reverse the respective procedures special ressembly
procedures are described only when required.

3. Select item from the following index when checks or
replacement are required.

Contents

1. Checking for the main P.C.B.

2. Checking for assembling the rear cabinet.

3. Replacement for the motor and capstan belt.

4. Replacement for the intermedeate ornament (A).

5. Replacement for the head block ass’y.

5.1. Checking for the main P.C.B.

5.1.1. Checking for the main P.C.B. (A

side)

5.1.2. Removal for checking main P.C.B.
(B side)

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RQ-SX79GK / RQ-SX79GD

5.2. Replacement for the motor
and capstan belt

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RQ-SX79GK / RQ-SX79GD

5.3. Replacement for the
intermediate ornament (A),
intermediate ornament (B),
intermediate ornament (C) and
open knob ass’y

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