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RT-160H(S)
CIRCUIT ADJUSTMENT
TP101 or
nde ay
@ Tape Selector Switch: Normal
TP201
Record/Pt
:
:
@ Dolby NR Switch: off
ecord/Playback
Ejectronic
OF SWITCH
Head
Voltmeter
@ Input Selector Switch: Line
AND KNOB
ADJUST-
ITEM
INPUT
MENT
REMARKS (CHECK)
POINT
BIAS
OSCILLA-
Figure 8—1
BIAS OSCILLATION
FREQUENCY/BIAS CURRENT
TION
L302
105 +5 kHz
FRE-
Record Mode
TP301
Erase
Electronic
QUENCY
poo
Voltmeter
BIAS
L: VR301
| Normal:
45 mV
~ a
CURRENT
R: VR302 | (Metal:
59 ~ 71 mV)
(CrO2:
81~99mvV}
ERASE
(Metal:
36 V +4V)
CURRENT
Figure 8-2
ERASE CURRENT
1
400 Hz,
L: R150
—10dB
(1 V=0dB)
Frequency Counter
Electronic
Voltmeter
. Adjust the record
level control knobs
so that the electro-
nic voltmeter reads
580 mV.
2. See that the seg-
ments of up to 0 dB
are lighting up.
If the segments of up
to —1 dB or of up to
+1 dB are lighting up,
take the procedures
shown in the Table *1.
LINE
Playback Mode
Out
Test Tape
MTT-150
Figure 8—3 PLAYBACK SENSITIVITY
LINE
Low Frequency
In
Oscillator
Attenuator
Record Mode
PLAYBACK
SENSI-
TIVITY
Test tape
MTT-150
Normal: 500 mV
RECORD/
|Non-
L: VR103 | 1. Adjust the record level
LINE
Tape
Sur Playback Mode
PLAYBACK | recorded
R: VR203
knobs so that the
Electronic
MTT-502
SENSI-
tape
electronic voltmeter
Voltmeter
TIVITY
(MTT-502)
reads 410 mV.
315 Hz,
2. Playback the normal
—20 dB
tape recorded and
(1 V=0 dB)
adjust the semi-
variable resistor so that
the electronic volt-
meter reads 345 —
Figure 8-4
RECORD/PLAYBACK
SENSITIVITY
487 mV.
Line
,
——*
Mic
<+—eLine
in
out
Table *1
Up to —1 dB
Cut the resistor R152 or R252
Up to +1 dB
Cut the resistor R150 or R250
TPIOZ(SFW)
Eas
a!
TPIO2
VR302
i | =
——-TP3OUST-W)
{
sear Wi
VR30}
——
| ee
VRIO3{g|
©) vRioi
ae
VR203
rai
TP IO }-G-— RIOINIOON)
=
TP 20) — ase Reoilloon)
VR20l
i
Electronic
R250tI80K)
R281(27K)
LINE
LINE
Voltmeter
cinta'
Low Frequency
In
out
RISK 27K)
Osciliator
/
,
ery,
R1IS2(82K
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