Sony TC-S3, Service Manual

Page: 11 / 30

11
TC-S3
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
Note: Use following buttons in the test mode.
no mark : Button of Tape unit (TC-S3)
*1 : Button of amplifier unit (TA-S7AV or TA-S3)
*2 : Button of CD unit (CDP-S3)
Tape Speed Adjustment
DECK B
Note:
Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
[HI-DUB]
button.
Procedure:
1. Turn the power switch on.
2. While pressing the both
[PLAY MODE]
* 2 and
[ ]
* 2 buttons,
press the
[DISC 3]
* 2 button.
(The “GROOVE” on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the
? / 1
* 1 button.
Mode: Playback
1. Insert the WS-48B into the deck B.
2. Press the
N button on the deck B.
3. Press the
[HI-DUB]
button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board so that frequency
counter reads 6,000
±
30 Hz.
5. Press the
[HI-DUB]
button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000
±
15 Hz.
Adjustment Location: LEAF SW board
Playback level Adjustment
DECK A DECK B
Procedure:
Mode: Playback
1. Confirm that level difference between the channels is with
±
0.5 dB.
2. After check, adjust the following RVs.
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that
adjustment within adjustment level as follows.
Adjustment Level:
MD OUT jack (J601) PB level: 334.4 to 748.7 mV
(–6.8
±
0.5 dB)
Adjustment Location: MAIN board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
set
test tape
P-4-A100
(10 kHz, –10 dB)
oscilloscope
L-CH
R-CH
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good wrong
ST-
S3/S5/SV7
MD OUT jack
(J601)
+
–
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
frequency counter
ST-
S3/S5/SV7
MD OUT jack
(J601)
set
test tape
P-4-L300J
(315 Hz, 0 dB)
ST-
S3/S5/SV7
+
–
level meter
MD OUT jack
(J601)
reverse
forward
x