Electrical Adjustments - Sony TCS-30D Service Manual

PRECAUTION
1. Specified voltage : 2.5 V (DC)
2. Setting
SPEED CONTROL dial
0 dB=0.775 V
Test Tape
Type Signal
P-4-A063 6.3 kHz, –10 dB
WS-48A 3 kHz, 0 dB
Record/Playback Head Azimuth Adjustment
Setting:
Mode: playback (normal speed)
test tape
P-4-A063
US: 32 Ω
(6.3 kHz, –10 dB)
Except US: 16 Ω
set
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:
adjustment screw
Press the N
button.
SECTION 5

ELECTRICAL ADJUSTMENTS

: center click
Used for
Head Azimuth Adjustment
Tape Speed Adjustment
level meter
+
–
i jack (J301)
Tape Speed Adjustment
Setting:
test tape
WS-48A
(3 kHz, 0 dB)
set
Procedure:
– Normal –
[REC TIME]
1. Set the
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) –
[REC TIME]
1. Set the
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:
– MAIN BOARD (Conductor Side) –
J301
RV602
Tape Speed Adjustment
(Double)
Tape Speed Adjustment
– 9 –
frequency counter
US: 32 Ω
Except US: 16 Ω
+
–
i jack (J301)
[NORMAL]
switch (S601) to
[DOUBLE]
switch (S601) to
J302
RV601
(Normal)
position.
position.