Adjustment - Sharp Rt-101H Serviceanleitung

RT-IOIH/HB
BIAS CURRENT

ADJUSTMENT

• Connect instruments as shown iry Figure 6-1 and adjust, yari-
able •resistor-VR30.I ot VR302
with the tape selector switch set at each position is shown
Table 6-1
Tape-sel ector= -
switch
Normal iomv (400ÅÄ)
55
cr02
(550
80
Metal
(800
ERASE VOLTAGE CHECK
e Connect instruments as shown in Figure 6-2 and check it the
erase voltage is as shown in Table 6-2.
Tape selector, switch
Metal
PLAYBACK SENSITIVITY
• Connedt insttüments as shown in Figure 6-3 and adjust vari-
able resistor VRIOI or VR201 so that the playback sensi-
tivity' is as shöWn in Table 6-3.
Switch
Tape selector switch at "normal".
Dolby NR switch at "off".
RECORD/PLAYBACK
• Connect instruments as shown in Figure 6-4,' adjust variable
resistorVR103 or VR203i s o that the record/playback sen-
sitivity is as shown in Table 6-4 and 6-5.
Step .Switch
Tape selector switch
Reco'rd
at "normal".
Dolby NR switch at
Play- 'off
back
Cr02 tape
Metal tape
ELECTRICAL
so that bias current-available
Ädjüstment
(Biai current)_
VR302
65mV
Checking
92mV
920gA)
Table 6-1
Voltage (erase voltage)
27 31V
Table 6-2
'ADJUSTMENT
Voltage Adjustment
VRIOI
580 mV
VR201
Table 6-3
SENSITIVITY ADJUSTMENT
Voltage
Adjustment
Atteriuätér
410.mV
vA103 tl-'-éh),
VR203 (R-ch)
Table 6-4
345 487 mV
345 '-0 487 mV
Table 6-5
ADJUSTMENT
Record me-de
unit
Record
mode
Unit
Test tape
(L.ch),
MTT-150
(400 Hz
(R-ch)
200 pWb/mm)
CR Oscillator
1 kHz
Electronic
ter
00
RECIP8-head
TPIö1 IL-ch)
TP201 (Fl-chh
R202
100 Ohm
Ground
Figure 6-1
ERASE head
x
TPä0i
Ground
Figure 6-2
TP103 {L.ch)
RECIPB
hqpd Playback mode TP203 (Rd-I)
Unit
Ground
Figuee 6-3
CNP2 0 or 9
Att%luater
Record i•node
(70mVl
Unit
TP103 (L-ch)
TP203 (R-ch)
i Unit
Ground
Figure 6-4
Electronié
Electron iC
Voltmeter
O
Electronic
voltrneter
00
o
Normal tape
Cr02 tape
(XL-.211}
Me.tål.tapg