Sony TC-D705 - Page 7

Tape Speed Adjustment |DECK A} |DECK B
Procedure:
Mode: playback
test tape
WS-48B
(3kHz, 0dB)
=
frequency counter
47k Q
Sexe
(sha)
Perform high speed adjustment before normal speed ad-
justment.
LINE OUT
CN505
pin@:Lch
pin@:Rch
(High speed adjustment)
1. Continue pressing the SYNCHRO DUBBING HIGH
SPEED switch.
2.Check that frequency counter reading is within the
standard value 6,000 +30 Hz.
3. If out of the standard, adjust each RV72 so that the
frequency counter reading satisfies 6,000+30Hz on
both A and B decks.
4.Change over to REV playback status, and repeat the
above steps | to 3.
(Normal speed adjustment)
1.Continue pressing the SYNCHRO DUBBING NORM
SPEED switch.
2.Check that the frequency counter reading is within the
standard value 3,000+30Hz.
3.If out of the standard, adjust each RV71 so that the
frequency counter reading satisfies 3,000+30Hz on both A
and B decks.
4.Change over to REV playback status, and repeat the
above steps 1 to 3.
Frequency difference between the beginning and the end
of the tape should be within 3%.
Frequency difference between deck A and deck B the
beginning of the tape should be within 1.5%.
Adjustment Location:
' MD(A), MD(D) board
Playback Level Adjustment
[DECK A] [DECK B]|
Procedure:
Mode: playback
test tape
P-4-L300
(315kHz, OdB)
p=
VTVM
CN505
pin@:Lch
LINE OUT
pin@:Rch
Adjust RV11 (L-CH), RV21 (R-CH) so that the reading on
VTVM meets the adjustment limits below.
Adjustment Limits:
LINE OUT level: —5+0.5dB (0.42 —-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(A), MD(D) board
Record Bias Adjustment |DECK B
Setting:
REC LEVEL control: Standard Record (See page 6.)
Procedure:
Mode: record
blank tape
LUNE IN. CS-413
no signal
digital
voltmeter
1. Connect the digital voltmeter to test point TP601.
2. Set RV301(L-CH) and RV401(R-CH) to mechanical center.
3. Set to FWD record mode.
4. Adjust T301(L-CH) and T401(R-CH) so that the digital
voltmeter reading becomes minimum.
Adjustment Location: HX PRO board