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SECTION 4 ELECTRICAL ADJUSTMENTS
Precaution � Supplied voltage: 2.5 V � Switch and control position VOR switch (S401): OFF PAUSE switch (S105): OFF VOL (RV101): mechanical mid SPEED CONTROL (RV602): mechanical center POP-UP MIC switch (S302): FLAT
set
Tape Speed Adjustment Procedure: Mode: playback
Standard tape for adjusting WS-48A (3 kHz, 0 dB) 10 k �
+ �
frequency counter
Test Tape
Type P-4-A063 WS-48A Signal 6.3 kHz, �10 dB 3 kHz, 0 dB Used for head azimuth adjustment tape speed adjustment
EAR jack
0 dB=0.775 V Record/Playback Head Azimuth Adjustment Procedure: Mode: playback
test tape P-4-A063 (6.3 kHz, �10 dB) 10 k � set EAR jack
+ �
1. Play back WS-48A (tape end part) and adjust RV601 so that the frequency counter reading becomes 2,985 � 3,015 Hz. 2. Play back WS-48A tape the beginning and the end part, check that the frequency counter reading is within same standard of step1. Adjustment Location:
[MAIN BOARD] (Side B)
level meter
1. Turn the adjustment screw to obtain the maximum reading on level meter.
Note: Several peaks may appear, but take the maximum.
IC101
2. After the adjustment, lock the adjustment screw with suitable locking compound.
RV601
Adjustment Location:
RV602 IC501 S102
adjustment screw
�6�
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