SAMSUNG MM-B9
Service Manual

Alignment and Adjustments

2. Cassette Deck
2-1. To Adjust Tape Speed
Notes 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 frequency counter as in figure 1-5.
MAIN PCB SPK OUT output Figure 1-5 Frequency Counter

2-2. To Adjust PlayBack Level/REC
Notes 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.

Step

Item

Pre-Setup Condition

Pre-Setup

To Adjust

Standard

Remark

1

NOR SPEED Control

SPK OUT (connected to the frequency counter)

1) Deck :MTT-111 2) Press PLAY SW button FIXed 3KHz

1. Adjust Deck Play Level
±1% range Step Item Pre-Setup Condition Pre-Setup After putting MTT 114N into Deck - Press FWD PLAY button. To Adjust Standard Remark

1
Recording /Play head MAIN PCB
SPK OUT
VTVM

AZIMUTH

SPK OUT (VTVM is connected to the scope)

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

Max output and same phase (both channels)

After adjustment secure it with REGION LOCK.

Oscilloscope

(GND)

In Out Figure 1-7

2. Adjust Deck REC BIAS
Step Item Pre-Setup Condition Pre-Setup
After putting MTT -

AZIMUTH control screw Figure 1-6

To Adjust

Standard

Remark

1

Recording Bias
Frequence

5512 into Deck
1) Press REC PLAY button. 2) T APE PCB JR55L/R (by JCON1) ,connected to VTVM

- T JT1 to the urn right and left.

105KHz

Audio OSC.

SET (MAIN PCB)

VTVM

Oscilloscope

After putting MTT -

2
IN AUX IN TP SPK OUT

Recording Bias Voltage

5512 into Deck
1) Press REC PLAY button. 2) T APE PCB JR55L/R (by

FIXed

CHECK TO 7mV(±0.5mV)

IN OUT

JCON1) ,connected to VTVM

Figure 1-8

1-2

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