Samsung MM-B7, MM- ZB7 Service Manual

MICRO COMPONENT SYSTEM

MM-B7/ ZB7

SERVICE

Manual

MICRO COMPONENT SYSTEM CONTENTS

Standby/On

Phones

Open/Close

Band

TAPE

AUX

TUNER

Volume

Tuning

Mode

Down

Demo

Rec/Pause REV.Mode

Sound Mode

Full Auto Remote Control Operation

Push EjectPush Eject

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

ELECTRONICS

Printed in Korea Code no.AH68-01107R

1-1Samsung Electronics

1. Alignment and Adjustments

1.Tuner

FM THD Adjustment

Output

28 dB(±2dB)

60 dB

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

SSG FREQ. Adjustment

point (FM DET)

98 MHz

FM DETECTOR COIL

FM Search Level Adjustment

Adjust SVR1 so that “TUNED” of FLT 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

BEACON SENSITIVITY SEMI-VR(20KΩ)

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

20 kΩ

OUTPUT

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

AM IF

Figure1-3 AM I.F Adjustment

OUTPUT

* Adjustment Location of Tuner PCB

AM(MW) OSC Adjustment

Output

1~7.0±0.5V

Received FREQ. Adjustment

point

522~1611 KHz

AM(MW) RF Adjustment

ITEAM

594 KHz

Maximum Output(Fig1-4)

Fig 1-4 OSC Voltage

LW OSC Adjustment

146~290 KHz

2~7.0±0.5V

AM(MW) RF Adjustment

150 KHz

Maximum Output(Fig1-4)

(GND)

VTVM

Alignment and Adjustments

1-2 Samsung Electronics

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

NOR SPEED Control

SPK OUT (connected to the frequency counter)

CVR1

3KHz

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup Condition

1) Deck :MTT-111

2) Press PLAY SW button

AZIMUTH

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 MTT114N into Deck

- Press FWD PLA Y button.

- Turn JT1 to the right and left.

105KHz

CHECK TO 58mV(±10mV)

FIXed

Remark

Standard

To Adjust

Pre-Setup

Item

Step

Pre-Setup Condition

After putting MTT5512 into Deck

1) Press REC PLA Y button.

2) TAPE PCB JR1 L/R (by JWA1) ,connected to VTVM

After putting MTT5512 into Deck

1) Press REC PLA Y button.

2) TAPE PCB JR1 L/R (by JWA1) ,connected to VTVM

Recording Bias Voltage

2-2. To Adjust PlayBack Level/REC

2. Adjust Deck REC BIAS

1. Adjust Deck Play Level

MAIN PCB

output

SPK OUT

Frequency Counter

Figure 1-5

Figure 1-6

SPK OUT

Recording /Play head

AZIMUTH control screw

(RVS Play)

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

SPK OUT

IN OUT

Recording Bias

Frequence

AZIMUTH control screw

(FWD Play)

2.Exploded Views and Parts List

2-1 Cassette Deck

Samsung Electronics 2-1

No. Code No. Description Specification Remarks

AH59-01080A DECK-CASSETTE ADR248BTR1 DC12V

1 AH81-00098A A/S-HEAD ASSY TR981A,14KHZ MT91-11011S 2 AH81-00422A A/S-ASSY MOTOR CCM090L2 MT91-15013Y 3 AH81-00100A A/S-BELT MAIN ADR2400S-MAIN 6602-001037 4 AH81-00101A A/S-BELT SUB ADR2400S,34.7 6602-001055 5 AH81-00102A A/S-SOLENOID ADR2400-1 MT75-00049A

2-2 Total Exploded View and Parts List ;MM-B7/ ZB7

Samsung Electronics

2-2

* Parts List

1 AH64-01899F DECO-FRONT; ABS L/GRAY 1

AH64-01899G DECO-FRONT; ABS L/GRAY 1 2 AH67-00181A LENS-STANDBY;PMMA MILKY 1 3 AH67-00173A LENS-POWER; PMMA RED 1 4 AH64-01910B KNOB-POWER; ABS L/GRAY 1 5 AH67-00172A LENS-DIR; PMMA BLUE 1 6 AH64-01909B KNOB-FUNCTION; ABS L/GRAY 1 7 AH64-01908B WINDOW-VFD; PMMA CLR SMOKE 1 8 AH64-01907A WINDOW-CASS; PC BLUE 1 9 AH64-01902B DOOR-CASS; ABS L/GRAY 1 10 AH64-01894B CABINET-FRONT; MIPS L/GRAY 1 11 AH61-01073A SPRING-EJ DOOR; SUS 304 1.0T 1 12 AH61-80030A ASSY DAMPER;POM M0.8 1 13 AH95-50001A ASSY LATCH; MAX 555 1 14 AH59-01080A DECK-CASSETTE 1 15 AH67-00174B LENS-VFD; PMMA CLR 1

AH67-00174C LENS-VFD; PMMA CLR 1 16 AH61-01070A HOLDER-VFD LENS; ABS BLACK 1 17 AH61-01075A HOLDER-VFD; ABS BLACK 1 18 AH61-00644A HOLDER-ILLUMINATION; ABS 1 19 AH67-00175A LENS-CD L; PMMA MILKY 1 20 AH64-01896B CABINET-SIDE L; MIPS L/GRAY 1 21 AH61-01071A BRACKET-H/S; SECC 1.0T 1 22 AH64-01900B DECO-TOP;ABS L/GRAY 1 23 AH64-01106G DECO-SCREW; SWCH16 1 24 AH64-01905B WIINDOW-TOP MOTOR; PMMA CLR SMOKE 1 25 AH64-01903B DOOR-CD MOTOR; PC+ABS 1 26 AH64-01898B CABINET-TOP; MIPS L/GRAY 1 27 AH61-20529B CAP-P/U 1 28 AH59-01082A DECK-CDP; CMS-P31BG6, SOH 1 28-1 AH30-00037A PICK-UP; SOH-AAH(1H20L), 100*80*45 1 29 AH73-00010A RUBBER-HOLDER;BUTYL 4 30 AH61-01068A HOLDER-CD; PC+ABS 1 31 AH61-01069A HOLDER-GEAR; PC+ABS 1 32 AH66-00103A GEAR-B; POM BLACK 1 33 AH66-00102A GEAR-A; POM BLACK 1 34 AH66-00101A GEAR-PULLEY; POM BLACK 1 35 AH64-01911A CABINET-BOTTOM; SECC 1.0T 1 36 AH64-01897B CABINET-SIDE R; MIPS L/GRAY 1 37 AH67-01072A BRKT-GND; PBS 0.3t 1

38 AH64-01895A CABINET-REAR; MIPS L/GRAY 1

AH64-01895B CABINET-REAR; MIPS L/GRAY 1 39 AH63-00439A FILTER-VFD; KIMO 100 1 40 AH61-01128A BRKT-H_GEAR:SECC T1.0 1 41 AH59-01083A DECK-CD PACK MECHA ASSY 1

A 6003-000276 SCREW-TAP TITE: BH 3X10 YEL 50 B AH60-00014A SCREW-TAP TITE: BH 4X6 YEL 4 C AH60-10001A SCREW-TAP TITE:PWH 2X5 pi7 3 D AH60-10020B SCREW: RH 2.6X5 YEL 2 E AH64-01106H SCREW-TAP TITE:BWH 3X10 pi12 4 F AH60-10180A SCREW-TAP TITE: BWH 2.6X10 YEL pi10 4 G 6002-000126 SCREW-TAPING FH 3X10 BLK 2

No. Code No. Description & Specification Q’TY Remarks

Samsung Electronics

2-3

No. Code No. Description & Specification Q’TY Remarks

2-3 SPEAKER Exploded View and Parts list

* CAUTION :It is used the bonding, connect FRONT PANEL to CABINET WOODEN.

So when the disassembly, take extreme care not to demage the SPEAKER.

Samsung Electronics

2-4

+ 16 hidden pages