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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




L21
(FM IF
ADJUSTMENT)




L140 VR298
(RECORD BIAS (MOTOR SPEED
ADJUSTMENT) ADJUSTMENT)

Figure 1. Main P.C. Board


-8-
TUNER ADJUSTMENT
Item Test Point Adjustment Adjust for
DC Voltage IC102 , pin L21 0V 50mV

Electronic
FM Antenna OSCILLOSCOPE
Terminal
Signal Generator
26 , 28 PIN


Unit


GND
Figure 2. Tuner(S curve) Adjustment Connection Diagram


TAPE DECK ADJUSTMENT
1. AZIMUTH ADJUSTMENT

Deck Mode Test Tape Test Point Adjustment Adjust for Remark
Speaker Forward:Righthand Side Screw
Playback MTT-114 Head Screw R/L Maximum
Terminal Reverse:Lefthand Side Screw

Electronic Dual-trace
Voltmeter synchroscope

Head Speaker
Playback Mode
Terminal
L out
L ch CH1 CH2

Test Tape Unit
MTT-114 R ch GND


R out


Figure 3. Azimuth Adjustment Connection Diagram


2. MOTOR SPEED ADJUSTMENT

Deck Mode Test Tape Test Point Adjustment Adjust for Remark
Speaker VR298 After adjusting in forward, confirm
Playback MTT-111 3kHz 45Hz
Terminal (MAIN PWB) the specification in reverse mode.


Head Speaker Terminal Frequency Counter
Playback Mode

L out
Test Tape
MTT-111 Unit
R out
Record/Playback GND
Head


Figure 4. Motor Speed Adjustment Connection Diagram


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3. RECORD BIAS ADJUSTMENT

Deck Mode Test Tape Test Point Adjustment Adjust for
Rec/Pause MTT-5511 Erase Head Wire L140 86kHz