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ADJUSTMENT:
ITEM
TEST-POINT
OV
IFI60I
Limiter
VR602
SO
VR60I
S-meter
VRI02
SASC
VR603
Separation
VR604
CW
VR50I
DK
VR502
Tape
speed
TRIOI
VR40I
Dolby
NR
VR402
TOP
VIEW
PROCEDURE
I.CONNECT
THE
DIGITAL
VOLT-METER
TO
TP3
AND
TP4.
2.
INPUT
THE
98.IMHz/30dB
SIGNAL(no
MOD),AND
ADJUST
THE
READING
OF
DIGITAL
VOLT-METER
TO
0±201lV
BY
IFI60!.
I.
INPUT
THE
98.IMHz/65dB
SIGNAL(400Hz,30%
MOD).
[OUTPUT:OdB(0.245V)]
2.SET
THE
SSG
OUTPUT
TO
10dB,AND
ADJUST
THE
OUTPUT
LEVEL
TO
-3dB
BY
VR602.
I.CONNECT
BETWEEN
TP9
AND
TPIO(5V).
2.
INPUT
THE
98.IMHz/23dB
SIGNAL(400Hz,309Vo
MOD).
3.ADJUST
VR601
SO
THAT
THE
VOLTAGE
OF
TP5
IS
IN
THE
RANGE
OV
TO
5V.
I.CONNECT
THE
DIGITAL
VOLT-METER
TO
TP6.
2.
INPUT
THE
98.IMHz/35dB
SIGNAL(400Hz
no
MOD).
3.
ADJUST
THE
LEVEL
TO
2.4
±
0.1
V
BY
VRI02.
1.
INPUT
THE
98.IMHz/65dB
SIGNAL(7KHz
30%
MOD).
2.SET
THE
OUTPUT
TO
OdB
BY
VR603
FULLY
COUNTER-CLOCKWISE.
(0.
775V)
3.SET
THE
SSG
OUTPUT
TO
43dB,AND
ADJUST
VR603
SO
THAT
THE
OUTPUT
LEVEL
IS
-2dB.
1.
INPUT
THE
98.
IMHz,CONNECT
THE
OUTPUT
OF
A
STEREO
MODULATOR
TO
THE
EXTERNAL
MODULATION
TERMINAL,
AND
INPUT
A
65dB
SIGNAL.
2.SET
THE
STEREO
MODULATOR
TO
THE
L
OR
R-ch
AND
ADJUST
VR604
SO
THAT
THE
MAXIMUM
SEPARATION
IS
OBTAINED.
(MORE
THAN
20dB)
I.CONNECT
THE
MILLI
VOLT-METER
TO
TP8.
2.
INPUT
THE
98.IMHz/65dB
SIGNAL(IOOHz,MONO)
AND
ADJUST
THE
LEVEL
TO
1.
77V±
IdB
BY
VR501.
I.
INPUT
tTHE
98.IMHz/55dB
SIGNAL
(no
MOD,SK
DK
on)
2.CONNECT
THE
OSCILLOSCOPE
TO
TP9,AND
ADJUST
VR502
SO
THAT
THE
OSCILLOSCOPE
OUTPUT
WAVEFORM
IS
MAXIMUM.
1.
INSERT
A
TAPE
SPEED
TEST
TAPE
(3000Hz).
2.ADJUST
THE
TAPE
SPEED
TO
3000±45Hz
BY
TRIO!.
1.
INSERT
A
DOLBY
LEVEL
TEST
TAPE
(400Hz-200nWb/.),CONNECT
THE
MILLI
VOLT-METER
TO
TPI(L)
AND
TP2(R).
2.
ADJUST
VR401(L)
AND
VR402(R)
TO
OBTAI
N
AN
OUTPUT
OF
388mV
± 1
dB.
ADJUSTMENT
POINT/TEST
POINT
BOTTOM
VIEW
TP5
VR
601
r--
VR
603
1FT
601
------,
VR
604-----,
MAIN
PWB
~VR602
VR
102
*
DIVER
F
IX(HAIN)
:
Connect
TP12
to
earth.
I PU-9836A]
-2-
-TP4
TP3-
C!)
T~P6
(:~~.
TP7
~
TPI2
••••
TPIO
TP'4
TPB
TP2
MAIN
PWB
TPII
C!)TP9