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BLOCK DIAGRAM (CD)
CD
MECHANISM
|
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DAC(D/A
CONVERTER)
G103
SWITCHING
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x101
PROCESSOR
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OPEN
SW
TAPE DECK/ AMPLIFIER UNIT ---2--2--220--000000eene
ADJUSTMENT
OF
DECK
& TORQUE
4.
Amplifier Adjustment
ADJUST
ITEM
DECK
| TEST TAPE
INPUT
DOLBY SW | OUTPUT
POINT
;
DECKA
TAPE
Azimuth
Adjust
so
as
10kHz
output
become
Head Azimuth
VTT738
OFF
DECK B
OUT
Screw
maximum.
| SVR30 (L-ch)
Playback
Adjust so as TAPE OUT output become
0.54V.
Rec/Play
1kHz
TAPE
SVR34 (L-ch)
| Adjust SVR so as Monitor o/p =R/P
Level
DECKA
AC224
OFF
Level
-18dB
OUT
SVR35 (R-ch)
=
OdB+1dB.
R/P
s i
|, set frequency
characteristic
iKDEHOkS
signal,
s
requency
a
isti
DECK B
AC224
-28dB
1kHz output to OdB.
Adjust
SVR so as
10kHz output become
+ idB.
Note.
1. During alignment, measurement Beat cancel SW is at 1 condition fundamentally, confirm Rec/Play frequency characteristic,
dolby effect also by 2 condition, when ship out set SW to 1 position.
SVR36 (L-ch)
SVR37 (R-ch)
Rec/Play
Frequency
2.
Tape Speed Adjustment
Connect the FREQUENCY
COUNTER
to TAPE
OUT.
Insert the test tape(MTT-111N,
etc. : 3000Hz) into the DECKA.
Press the FWD PLAY button.
Adjust SVROO1 so that a frequency counter reading of 3000 +5 Hz is obtained.
Press the STOP button, and eject the test tape.
Insert the test tape(TCW-211, etc. : 1500Hz) into the DECK A.
Insert the tape (C-60 Blank tape) into the DECK B.
Press the REC button of DECK B and press the DECK A/B button.
Press the FWD PLAY button. Both mechanism become normal speed dubbing.
8. Short the high speed test pin to the high speed position.
(The mechanism is high speed dubbing.)
9. Confirm that a frequency counter reading of 2700 ~ 3300Hz is obtained.
Note : Set the test tape near the tape end.
TAPE SPEED
SVROO1
Oc
BN
4
TAPE OUT
PINS
FOR
HI
oun
2
3.
Parts Location
DECK-B
PLAYBACK
ADJUSTMENT
DECK-A
TAPE OUT
POINT A
19 kHz Trap
Reh Lech
EFFECT ADJUST
—_
L3730
L3830
Lch
Reh
iG
PLAYBACK
ADJUSTMENT
———_.7".
SVR33 SVR31 SVR30 SVR32 SVR35 SVR34
Rch
Rech
Lch
Lech
Rech
Lech
REC/PLAY
GAIN
ADJUSTMENT
| ie)
HIGH SPEED
TEST
POINT
CN373
CN371
Cid
Ed
CN331 £3300
DECK A
DECK B
SVR37
SVR36
E.HEAD
PLAY HEAD)
R/P HEAD
Rech
Lch
CONNECTOR
CONNECTOR
"—~y——~
BIAS ADJUSTMENT
BIAS FREQUENCY
CONNECTOR
ADJUSTMENT
- 43 -
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