Goldstar ffh-170 Service Manual adj

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ADJUSTMENTS

This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers with the adjustment, realignment may be necessary.

ADJUSTMENT & TEST POINT

Figure 1. Main P.C. Board

L140 (RECORD BIAS ADJUSTMENT)

L21 (FM IF ADJUSTMENT)

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TAPE DECK ADJUSTMENT

1. AZIMUTH ADJUSTMENT

Figure 3. Azimuth Adjustment Connection Diagram

2. RECORD BIAS ADJUSTMENT

Figure 4. Record Bias Adjustment Connection Diagram

TUNER ADJUSTMENT

Figure 2. Tuner(S curve) Adjustment Connection Diagram

CH1 CH2

Speaker Terminal

Playback Mode

Head

Test Tape MTT-114

L ch

R ch

GND

Dual-trace synchroscope

Electronic Voltmeter

L out

R out

Unit

28 PIN

Signal Generator

GND

Electronic OSCILLOSCOPE

FM Antenna Terminal

Deck Mode Test Tape Test Point Adjustment Adjust for Remark

Playback MTT-114

Speaker

Head Screw R/L Maximum

Forward:Righthand Side Screw

Terminal Reverse:Lefthand Side Screw

Item Test Point Adjustment Adjust for

DC Voltage IC10

, pin L21 0V 50mV

Deck Mode Test Tape Test Point Adjustment Adjust for

Rec/Pause MTT-5511 Erase Head Wire L140 83kHz±5kHz

Test Tape MTT-5511

Head

Record/Playback Head

Record/Playback and Pause Mode

Unit

Erase Head Wire

GND

Frequency Counter

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