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SECTION 5 ELECTRICAL ADJUSTMENTS
1. Specified voltage 2. Setting SPEED CONTROL dial PRECAUTION : 2.5 V (DC) : center click Tape Speed Adjustment Setting:
test tape WS-48A (3 kHz, 0 dB) set
Signal 6.3 kHz, �10 dB 3 kHz, 0 dB Used for Head Azimuth Adjustment Tape Speed Adjustment
0 dB=0.775 V
Test Tape
Type P-4-A063 WS-48A
frequency counter US: 32 � Except US: 16 � + � i jack (J301)
Procedure: � Normal � 1. Set the [REC TIME] switch (S601) to [NORMAL] position. 2. Playback WS-48A (tape center) in the FWD state. 3. Adjust RV601 so that the frequency counter reading becomes 3,000 Hz. Specified Value: 2,970 to 3,030 Hz
Record/Playback Head Azimuth Adjustment Setting: Mode: playback (normal speed)
test tape P-4-A063 (6.3 kHz, �10 dB) set
level meter US: 32 � Except US: 16 �
+ �
4. Check that deflection of the frequency counter reading between the beginning and the end of tape is within 1.5% (approx. 45 Hz). � Double (1/2 SPEED) � 1. Set the [REC TIME] switch (S601) to [DOUBLE] position. 2. Playback WS-48A (tape center) in the FWD state. 3. Adjust RV602 so that the frequency counter reading becomes 1,500 Hz. Specified Value: 1,485 to 1,515 Hz Adjustment Location:
i jack (J301)
Procedure: 1. Turn the adjustment screw to obtain the maximum reading on level meter.
Note: Several peaks may appear, but take the maximum.
2. After the adjustment, lock the adjustment screw with suitable locking compound. Adjustment Location:
� MAIN BOARD (Conductor Side) �
adjustment screw
J301
J302
Press the N button.
RV602 Tape Speed Adjustment (Double) RV601 Tape Speed Adjustment (Normal)
�9�
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