TAPE DECK ADJUSTMENT
1. Amplifier Adjustment
I ITEM
]TESTTAPEI INPUT I DOLBY IOUTPU7
1 Head Azimuth
VIT-738 OFF
TAPE
OUT
2
Tape Speed MTT-lll N
-
OFF
TAPE
OUT
Playback
3
TCC-130 OFF
TAPE
Level OUT
Rec / Play
AUX IN
4 AC-224
lkHz /l OkHz ON
TAPE
Frequency
-31dB
OUT
ADJUST POINT REMARKS
Azimuth Screw I Adjust so as 10kHz output become maximum.
Adjust SVR so as 10kHz output become
SVR40
maximum.
SVR31 (L-ch)
SVR32 (R-ch)
Adjust so as TAPE OUT output become 0.58V.
SVR35
(L-ch)
R/P signal, set frequency characteristic 1kHz
SVR36 (R-ch)
output to OdB. Adjust SVR so as 10kHz output
become ~ OdB.
Note: During alignment, measurement Beat cancel switch is at 1 condition fundamentally, confirm Ret/Play frequency charac-
(1)
●
●
●
●
1)
2)
3)
4)
5)
teristic, dolby effect also by 2 condition,
Head azimuth adjustment
Be sure to clean the heads before attempting to make any adjustment.
Be sure both channels waveform are same for the phase matching.
Be sure both channels (1 and 2) are the same level. (Using a dual-channel oscilloscope.)
After completion of the adjustment, use the threadlock (TB-1 401 B) to secure the azimuth adjustment screws.
Load a test tape. (VTT-738 etc, : 10kHz)
Press the PLAY button.
FOWARD
h
REVERSE
Use a + ;screwdriver to turn the screw for forward azi- ‘ -- T ~. - :
muth adjustment so that the left and right outputs are
,.’
maximized at the same phase during forw;rd playback.
Playback the tape in the reverse
mode.
Use a flat-tip screwdriver to turn the-screw for reverse
azimuth adjustment so that the left and right outputs are
maximized at the same phase during reverse playback.
(2) Tape speed adjustment
●
1)
2)
3)
4)
4.
Make the adjustment
near where the test tape finishes winder.
Connect the FREQUENCY COUNTER to TAPE
OUT.
Insert the test tape(MTT-111 N, etc. : 3000 Hz)”into the DECK .
Press the FWD PLAY button.
Use a + screwdriver
to turn the SVR40 to adjust so that the frequency counter became 3000 t 5 Hz.
Press the STOP button, and eject the test tape.
2. Parts Location
SVR LO
TAPE SPEED ADJUSTMENT
I
‘Y–/~
EIEAT SWITCH
s3601
~j~;l ‘REQUENCV ‘OJusTMENr
TUNER/ TAPE DECK AMPLIFIER P.C.B
-19-
)-
PRE-AMPLIFIER P.C.B
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