Sony TC-RX55 - Playback and Speed Calibration; Playback Phase and Level Calibration; Tape Speed Adjustment Procedure

3. Phase Check Adjustment Location ;
Mode : playback smotor (M901) rear side
test
tape
Playback
Level
Adjustment
ag
Procedure
:
(10kHz,
~10dB)
oscilloscope
.
L-CH ATK Mode : playback
test tape
P-4-L300 VTVM
(315kHz, 0dB)
p=
LINE OUT
Screen pattern
Adjust RV41 (L-CH), RV61 (R-CH) so that the reading on
VTVM meets the specification below.
In phas 45° 90° 136° 180°
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Specification :
LINE OUT level: —540.5dB (0.41~0,46V)
Level difference between channels: less than 0,5dB
Check that the LINE OUT level does not change in playback
mode while changing the mode from playback to stop several
times,
Adjustment Location: MD (B) board
4, Set in the REV mode and repeat the step 1-3.
5. After the adjustment, lock the screws with locking
compound,
Adjustment Location : Record/Playback head
Tape speed adjustment
Turning clockwise, tape
speed becomes higher,
FWD REV
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Adjustment screw
¢ RV61
Tape
Speed
Adjustment
(R-CH)
|
Playback
RV41 level
(L-CH) adjustment
Procedure :
Mode: FWD playback
test lape
WS:48B
speed checker o
(3kHz, OdB) . 7
47k Q frequency counter
LINE OUT
Specifications :
SPEED CHECKER FREQUENCY COUNTER
Adjust the variable resistor which built-in the motor so that
the frequency difference between the beginning and the end
of the tape should be contented within 1.5% (45Hz).