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RT-101H/HB
;
_
BIAS CURRENT
ADJUSTMENT .
pes
e 'Connect instruments. as shown: in- Figure 6-1 ea ee vari-
able' resistor: VR3Q1 or VR302 so; that bias current-available
with the Hane meciae awitcy set at beach p poaeon is one:
ae Table 6-1. se
a ee
pai:
i e eet
"yo
eh Tae
yeas ae =
ee
ee
eee es rere
7 VR301- (ich).
Normal
| Bill eater "|. MR302:(R-ch)
| (550
~ 650uA)>
80 ~~ 92mV
(800 ~ 920uA) _
Table 6-1
Checking
ERASE VOLTAGE CHECK
=
@
Connect instruments as shown in Figure 6-2 and check it ie
erase voltage is as shown in Table 6-2.
-Table 6-2
Tape alstor awiteh.
Voltage lerass voltaue.
'
Metal
27~ 31V
PLAYBACK
SENSITIVITY : ADJUSTMENT:
® Corinect instriiments as shown in Figure 6-3 and adjust vari-
able resistor VR101 or VR201 so that the playback sensi-
tivity is as shown in Table 6-3.
"Switch
oe oo
Voltage'
"Adjustment
Tape seeise switch ey 'normal'.
| VR101 (Lech ),
Dolby NR switch at "off''.
VR201
(R-ch)
">. Table 6-3
RECORD/PLAYBACK' SENSITIVITY ADJUSTMENT
@ Connect instruments as shown in Figure 6-4, adjust variable
- resistor 'VR103 Or. VR203, sO. that the frgord/playback sen-
sitivity is as shown in Table 6-4 and 6-5.
_ Switch +
'Voltage ="); Adjustment
, | Pape selector switch |
Fi
"a
wo
Wie 'Attenuater
{ at normal". ;
goes?
Sa eae
fptadd cad:
Meth? wits
ye Vv R4 03° (6h), r
|. R203 (R-ch) -
ks
245 ~ 487 mV
245 ~ 487 mV
Table 6-5
ELECTRICAL ADJUSTMENT
9)
0
|
pias ee
= ay
aw, San —— a :
|
laure é- 1
; ERASE, 'head n aney
'Electronic
.
Voltmeter
.
Ground
.
Figure 6-2
Electronic
"REC/PB
-TP103 (L-ch) -Yoltmeter,
Test tape
—
MTT-150
{400 Hz
200 pWb/mm)
Ground
~~
Figure 6-3
CNP2
@or@®.
CR Oscillator
Attenuater
Record made
'-Normat tape:
TP103 (L-ch)
"had! | crO2 tape
eleewonic
TP203 (Rech) Plevbeck fade
Weta
_ voltmeter
HF {AC- 711},
; .Ground
Figure 6-4
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