Samsung MM-J5 Service manual

MICRO COMPONENT
SYSTEM

MM-J5

SERVICE

Manual

MICRO COMPONENT SYSTEM CONTENTS

1. Alignment and Adjustments

2. Exploded Views and Parts List

3. Electrical Parts List

4. Block Diagrams

5. Wiring Diagram

6. Schematic Diagrams

- Confidential -

1-1Samsung Electronics

1. Alignment and Adjustments

1-1. Tuner

FM THD Adjustment

Output

Output

28 dB(±2dB)

60 dB

Minumum Distortion (0.4% below)
(Figure 1-1)

SSG FREQ.
Adjustment

point
(FM DET)

98 MHz

FD

FM Search Level Adjustment

Adjust SVR1 so that “TUNED” of LCD is
lighted (Figure 1-2)

Figure1-2 FM Auto Search Level Adjustment

*Adjust FM S.S.G level to 28dB

Figure1-1 IF CENTER and THD Adjustment

SSG FREQ.
Adjustment

point

(SVR1)

98 MHz

SVR1 (10KΩ)

FM S.S.G

GND

28 dB

FM S.S.G

Output
GND

Speaker
Terminal

FM
Antenna
Terminal

Distortion Meter

Input

SET

Input

output

Oscilloscope

FM IN

FM Antenna

SET

10 kΩ

AM SSG
450KHZ

INPUT

AM ANT
IN

Speaker Terminal

60cm

AM IF

VTVM Oscilloscope

AM(MW) I.F Adjustment

Maximum output (Figure 1-3)

SSG FREQ.
Frequency
Adjustment

point

450 kHz
522 kHz

AA

Figure1-3 AM I.F Adjustment

OUTPUT

* Adjustment Location of Tuner PCB

Fig 1-4 OSC Voltage

AM(MW) OSC
Adjustment

Output

1~7.0±0.5V

Received FREQ.
Adjustment

point

522~1611 KHz

MO

AM(MW) RF
Adjustment

ITEAM

594 KHz

MA

Maximum
Output(Fig1-4)

LW OSC
Adjustment

146~290 KHz

LO

2~7.0±0.5V

LW RF
Adjustment

150 KHz

LA

Maximum
Output(Fig1-4)

Alignment and Adjustments

1-2 Samsung Electronics

Alignment and Adjustments

1-21-2

(GND)

VTVM

2-1. To Adjust Tape Speed

1) Measuring tape: i) MTT-111 (or equivalent)
(Tapes recorded with 3kHz)

ii) MTT-5512 (or equivalent)

2) Connect the SPK OUT of the MAIN PCB to the fre-

quency counter as in figure 1-5.

1) Before the actual adjustment, clean the play/recording
head.

2) Measuring tape :
i) MTT-114N(or equivalent 10kHz AZIMUTH control)
ii) MTT-5512

3) The cassette deck is connections as shown in figure 1-7.

Notes

Notes

NOR
SPEED
Control

1

SPK OUT
(connected
to the frequency
counter)

Fixed

3KHz

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup
Condition

1) Deck :MTT-111

2) Press PLAY
SW button

AZIMUTH

1

SPK OUT
(VTVM is
connected to
the scope)

- Turn the control
screw to as shown
in Figure 1-6.

Max output
and same phase
(both channels)

After
adjustment
secure it with
REGION
LOCK.

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup
Condition

After putting MTT­1 14N into Deck 1

- Press FWD PLA Y
button.

1

2

- Turn the control
screw to as shown in
Figure 1-6.

MAX OUTPUT
and same phase
(both channels)

CHECK TO
7mV(±0.5mV)

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup
Condition

After putting MTT­5512 into Deck 2

1) Press REC PLAY button.

2) TAPE PCB JCW3 ,connected
to VTVM

Recording
Bias
Voltage

2-2. To Adjust PlayBack Level/REC

2. Adjust Deck 2 Play Level/ REC BIAS

1. Adjust Deck 1 Play Level

SPK OUT

Figure 1-7

In Out

MAIN PCB

Oscilloscope

2. Cassette Deck

±1%
range

Figure 1-8

Audio OSC.

SET
(MAIN PCB)

Oscilloscope

AUX IN

VTVM

IN

SPK OUT

IN OUT

TP

AZIMUTH

Figure 1-6

Recording /Play head

AZIMUTH control screw

(RVS Play)

AZIMUTH control screw

(FWD Play)

SPK OUT
(VTVM is con­nected to the
scope)

Fig 1-8

- Turn JSR2L,JSR2R
to the right and left

After adjust­ment secure
it with
REGION
LOCK.

After putting MTT­1 14N into Deck 2

- Press FWD PLA Y
button.

MAIN PCB

output

SPK OUT

Frequency Counter

Figure 1-5

2.Exploded Views and Parts List

2-1 Cassette Deck (OPTION)

Samsung Electronics 2-1

2

4

5

7

8

10

9

6

1

3

No. Code No. Description Specification Remarks

AH59-01272A DECK -CASSETTE CMAL1Z230A A/STOP

1 AH81-01386A R/P HEAD ASS’Y HADKH5655A F513-853
2 AH81-01385A MAIN BELT MAIN BELT
3 AH81-00543C F/R BELT FF19S-31 FF19S-31
4 AH81-00543D SOLENOID F765-292 F765-292
5 AH81-00543E ROLLER PINCH BLK R F514-129 F514-129

7 AH81-01356A MOTOR CCM09-120L2-6
8 AH81-00543H REEL SENSOR SG-107F3;KODENSHI
9 AH81-00543J LEAF S/W - WHITE SPLFF
10 AH81-00543K LEAF S/W - BLK SPLFE1

No. Code No. Description Specification Remarks

AH59-01267A DECK -CASSETTE CMAL1Z230A A/REV.

1 AH81-00543A R/P HEAD ASS’Y HADKH5655A F513-853
2 AH81-00733A MAIN BELT MAIN BELT
3 AH81-00543C F/R BELT FF19S-31 FF19S-31
4 AH81-00543D SOLENOID F765-292 F765-292
5 AH81-00543E ROLLER PINCH BLK R F514-129 F514-129
6 AH81-00543F ROLLER PINCH BLK L F514-130 F514-130
7 AH81-01356A MOTOR CCM09-120L2-6
8 AH81-00543H REEL SENSOR SG-107F3;KODENSHI
9 AH81-00543J LEAF S/W - WHITE SPLFF
10 AH81-00543K LEAF S/W - BLK SPLFE1

2-2 Total Exploded View and Parts List

Samsung Electronics

2-2

* Parts List of The Exploded View

Samsung Electronics

2-3