Sony TC-S9 Service Manual page 10

Stereo cassette deck
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TC-S9
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.
within
L-CH
1dB
peak
Output
level
R-CH
peak
Screw
position
L-CH
peak
3. Mode: Playback
test tape
P-4-A100
(10 kHz, –10 dB)
L-CH
set
R-CH
waveform of oscilloscope
in phase 45 °
good
4. After the adjustments, apply suitable locking compound to
the pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
10
within
1dB
Screw
position
R-CH
peak
oscilloscope
+
ST-S9
MD OUT jack
(J601)
90 ° 135 ° 180 °
wrong
forward
reverse
Note: Use following buttons in the test mode.
no mark : Button of Tape unit (TC-S9)
*1
: Button of amplifier unit (TA-S9D)
*2
: Button of DVD/video CD/CD unit (DVP-S9)
Tape Speed Adjustment
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.
[PLAY MODE]
2. While pressing the both
[DISC 3]
2
press the
*
button.
(The "GROOVE" on the fluorescent indicator tube display
while in the test mode.)
To exit from the test mode, press the
Mode: Playback
test tape
WS-48B
(3 kHz, 0 dB)
set
ST-S9
1. Insert the WS-48B into the deck B.
2. Press the N button on the deck B.
[HI-DUB]
3. Press the
button in playback mode.
Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board so that frequency
counter reads 6,000 ± 180 Hz.
[HI-DUB]
5. Press the
button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
Playback Level Adjustment
Procedure:
Mode: Playback
test tape
P-4-L300J
(315 Hz, 0 dB)
set
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
Adjustment Location: MAIN board
DECK B
[ ]
2
2
*
and
x
*
buttons,
1
?/1
*
button.
frequency counter
+
MD OUT jack
(J601)
(WS-48B)
DECK A
DECK B
level meter
+
ST-S9
MD OUT jack
(J601)
(–6.8 ± 0.5 dB)

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