Sony TCS-30D - ELECTRICAL ADJUSTMENTS; Record;Playback Head Azimuth Adjustment; Tape Speed Adjustment (Normal and Double)

– 9 –
SECTION 5
ELECTRICAL ADJUSTMENTS
Tape Speed Adjustment
Setting:
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
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:
PRECAUTION
1. Specified voltage : 2.5 V (DC)
2. Setting
SPEED CONTROL dial : center click
0 dB=0.775 V
Test Tape
Record/Playback Head Azimuth Adjustment
Setting:
Mode: playback (normal speed)
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:
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB Head Azimuth Adjustment
WS-48A 3 kHz, 0 dB Tape Speed Adjustment
level mete
r
test tape
P-4-A063
(6.3 kHz, –10 dB) US: 32 Ω
Except US: 16 Ω
set
i jack (J301)
+
–
adjustment screw
Press the N
button.
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
set
i
j
ack
(
J301
)
–
+
US: 32 Ω
Except US: 16 Ω
RV602
Tape Speed Adjustment
(Double)
J301
RV601
Tape Speed Adjustment
(Normal)
J302
– MAIN BOARD (Conductor Side) –