Samsung MM-L2G Manual de usuario

MICRO COMPONENT

SYSTEM

MM-L2 MM-L2G

MM-L4 MM-L4G

SERVICE Manual

MICRO COMPONENT SYSTME CONTENTS

On/Standby

Volume

CD Repeat

A B

Band

Tuning Mode Up

Down

Timer

Clock

Mute

S.Bass

TUNER

TAPE AUX

Push Open

1. Alignment and Adjustments

2. Exploded Views and Parts List

3. Electrical Parts List

4. Block Diagrams

5. PCB Diagrams

6. Wiring Diagram

7. Schematic Diagrams

On/Standby

Push Open

Volume

Repeat

A B

Mute

Sync.

Band

Tuning Mode Up

Down

PTY

RDS Display

REC/

Pause

S.Bass

Power

Sound

Push Eject

TUNER

TAPE AUX

ELECTRONICS

Printed in Korea

Code no. AH68-20183R

1-1Samsung Electronics

1. Alignment and Adjustments

(Only MM-L4/L4G)

1.85 -0.05V),

Alignment and Adjustments

1-2 Samsung Electronics

(OPTION)

Alignment and Adjustments

1-3Samsung Electronics

2970 3030

(Only MM-L4/L4G)

1- 3 Tuner

FM Section

FM IF AdjustmentFM IF Adjustment

SSG FREQ. 10.7MHZ DEV=40.0KHZ LEVEL=60dB

Adjustment point (T101) FM DETECTOR COIL

Remark Maximum output (Figure 1-1)

Freq. Setting Tune to the lowest

SET

OscilloscopeOscilloscope

TP1 TP2

4P OUTPUT

*TP1:PIN 19 OF IC10219 OF IC102

TP2:PIN 4 OF IC101

Input

IF GENERATOR

FigureFigure 1-1 IF CENTER Adjustment

FM Frequency Coverage Adjustment

SSG.FREQ. FREQ.SETTING ADJUST.POINT REMARK

87.5MHZ TUNE TO THE LOWEST L101 0.9V

108MHZ TUNE TO THE HIGHEST CHECK 6V

Digital DC Voltmeter

SET

C160

++ -

Figure 1-2 FM Freq. Range Adjustment

(Only MM-L2/L2G)

Alignment and Adjustments

1-4 Samsung Electronics

FM Sensitivity Adjustment

SSG.FREQ. FREQ.SETTING ADJUST.POINT REMARK

90MHZ 90MHZ L102 MAX. OUTPUT

106MHZ 98MHZ C161 MAX. OUTPUT

FM Stereo Separation Check

fc fs Main Pilot Level Spec

98.0MHZ 1KHZ 53% 10% 66dB Normal : 25dB Limit : 20dBNormal : 25dB Limit : 20dB

FM Seek Stop Check

fc fs Dev Level Spec.

Seek Stop 98MHZ 1KHZ 40KHZ 23-30dB

OutputOutput Level

FMANT.

GND SET

FMSSG OSCILLOSCOPE VTVM

Figure 1-3 FM Stereo Separation AND Seek Stop Cheparation AND Seek Stop Check

AM (MW) SectionAM (MW) Section

AM (MW) IF Adjustment

IF GENERATOR 450KHZ

Frequency 999KHZ

Adjustment Point T102 AM IF COIL

Maximum output (Figure 1-4)

60cm AM ANT

T102

IFGENERATOR

450KHZ SET

OSCILLOSCOPE

Figure 1-4 AM IF Adjustment

MW Tuning Voltage (VT) Check

522KHZ : 0.9V+/-0.1VSpec.

1611KHZ : 7.25V+/-0.5V

Adjustment Low(522KHZ) VT Basic , Adjust T105(OSC)Low(522KHZ) VT Basic , Adjust T105(OSC)

RF Adjustment(Figure

1 Low Frequency(594KHZ), High Frequency(1404KHz),Usable Senc. (S/N 20dB) < 60dBLow Frequency(594KHZ), High Frequency(1404KHz),Usable Senc. (S/N 20dB) < 60dB

2 Adjust T104(MW ANT), GainAdjust T104(MW ANT), Gain Output Max.

3 Adjust C162 Gain Output Max.

60cm AM ANT

AMSSG

450KHZ SET

Speaker terminal

VTVM Oscilloscope

Figure 1-5 MW RF. Adjustment

Seek Stop Check

fc fs Dev Level Spec.

999KHZ 400 HZ 30% 40-70dB

AM (LW) Section

Tuning Voltage (VT) Check

144KHZ : 1.0V +/- 0.2VSpec.

290KHZ : 6.0V+/-0.5V

Adjustment Low (144KHZ) VTLow (144KHZ) VT Basic , Adjust T106(OSC)

RF Adjustment

1 Low Frequency (170KHZ), High Frequency(270KHz),Usable Senc. (S/N 20dB) < 68dBLow Frequency (170KHZ), High Frequency(270KHz),Usable Senc. (S/N 20dB) < 68dB

2 Adjust T103 (LW ANT), Gain Output Max.

3 Adjust C183 (LW ANT), Gain Output Max.

Seek Stop Check

fc fs Dev Level Spec.

212KHZ 400KHZ 30% 40-70dB

Alignment and Adjustments

1-5Samsung Electronics

1- Cassette Deck

Tape Speed Check

Item Tape Pre-setup Adjust point Standard Figure

Speed control MTT-111N

(3KHZ)

Press play

button afterbutton after

putting tapetape

into the Deck

2970KHZ-3030KHZ

WOW&FLUTTER

0.2%-0.4%

1-6

Frequency Counter

Speaker Terminal

SET OSC VTVM WOW-FLUTTER METFLUTTER METER

FigureFigure 11-6

Adjust Record Frequency

Item Tape Pre-setup Adjust point Frequency rangeFrequency range Figure

Record

Frequency

MTT-5513 Press Rec.

button after

connecting

T431 60KHZ+/-1KHZ Figure(1-7)

SETSET

TP3 IN OUT

TP4

Oscilloscope FrequencyOscilloscope Frequency counter

FigureFigure 11-7

Adjust Azimuth

Item Tape Pre-Setup Adjust Point Standard Figure

Azimuth MTT-111CN Press Play

Button after

putting tape into

the Deck

Adjustment

screw of HEAD

8KHZ Fig. 1-6

Fig 1-8

Recording/playRecording/play head

AZIMUTHAZIMUTH Control

Figure 11-8

(Only MM-L2/L2G)

Samsung Electronics 2-1

2.Exploded Views and Parts List

2-1 Cassette Deck of MM-L4/L4G

No. Code No. Description Specification Remarks

AH59-20006G DECK-CASSETTE ADR241BTR :

1 AH81-00098A ASS,Y HEAD TR981PA 14KHZ

2 AH81-00099A ASS,Y MOTOR EG530YD-2BH 12V

3 AH81-00100A BELT MAIN ADR2400S-MAIN

4 AH81-00101A BELT FR ADR2400S-FR

5 AH81-00102A SOLENOID ADR2400-1 12V

* AUTO REVERSE ; ADR241BTR(OPTION)

No. Code No. Description Specification Remarks

AH59-20006H DECK-CASSETTE ADR241CSR :

1 AH81-10022E RP HEAD MA15RAA2N1 12KHZ

2 AH81-00099A ASS,Y MOTOR EG530YD-2BH 12V

3 AH81-00100A BELT MAIN ADR2400S-MAIN

4 AH81-00101A BELT FR ADR2400S-FR

5 AH81-00102A SOLENOID ADR2400-1 12V

* AUTO STOP ; ADR241CSR(OPTION)

Samsung Electronics

2-2

2-2 Cassette Deck of MM-L2/L2G

No. Code No. Description Specification Remark

AH59-20006W YN21Z-SC-63 YANION MECHA DECK

1 AH81-10688A MOTOR EG530AD-2B 12V EG530AD-2B

2 AH81-11154E M BELT 6600-090020-001 6600-090020-001

3 AH81-11154D RF BELT 6600-090014-001 6600-090014-001

4 AH81-11150W RP HEAD TC-591 TC951

5 AH81-11150X E HEAD TC-230AN TC 230AN

6 AH81-11037D R.F PULLEY ASSÕY 8521-2000090-300 8521-2000090-300

7 AH81-11037J S REEL ASSÕY 8521-2000080-300 8521-2000080-300

8 AH81-11037K T REEL ASSÕY 8521-2000070-300 8521-2000070-300

* AUTO STOP ; YN21Z-SC-63(OPTION)

Samsung Electronics 2-3

2-3 TOTAL ; MM-L4/L4G

48-1

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