Technics RS-610US - Page 4

ELECTRICAL
ADJUSTMENTS
HEAD AZIMUTH ADJUSTMENT
(1) Method
1. Test equepments connection is shown in fig. 9.
2. Play azimuth tape (C-AAN 6.3 kHz).
3.
Adjust
R/P
head
angle
adjust
screw
(A)
in
fig.
8
so
that
output
at
the
LINE
OUT
jack
become
maximum.
(When
adjusting
the
R/P
head,
set
the
playback
VR
and
tone
VR
to
maximum).
4. After adjustment, lock the head adjust screw with lacquer.
(Record/Playback Head) (A) Measuring Circuit
Playback Mode
(Test Tape ) LINE OUT
Fig. 9
AMPLIFIER ADJUSTMENTS
Measurement condition
Record level Control ..........eeeeeeeeeeeee eee ees Maximum Dolby NR SWitch cts cnt2.c se hecdini nae Metschen eet OUT
Tape SeleCtOl saciscseeuietaiedss nian berg eaes Normal
ITEM SIGNAL SOURCE OUTPUT
CONNECTION CONNECTION ADJUSTMENT SPEC. REMARKS
Playback Playback the test | VTVM to LINE VR1 (CH1) Se
frequency . Playback :
responce.
tape
C-FDN.
OUT
jack.
;
VR2
(CH2)
fig.
10.
Playback the test | VTVM to LINE VR3 (CH1) 0.42+ The frequency of test
tape
C-FDN.
OUT
jack.
Playback
at
riey pecan: VR4 (CH2) 0.08 V | tape is 333 Hz.
Bias oscillation Oscilloscope with Record 84+
frequency.
AF
OSC
to
TP7.
7
kHz
|
See
fig.
11.
VTVM to TP7 See Greater | Record level control:
Erase current. é Record than hoes
fig. 12. 15V. Minimum.
VTVM to TP5
Recording bias (CH1) ie aioe Record level control:
L8 (CH2) fea
Current. TP6 (CH2) See de 16 . Minimum.
See fig. 13. Se NB on Oe
. .
VTVM
to
TPL
L1
(CH1)
;
justi
Bias
trap
coil
(CH1)
L2
(CH2)
MRIALIRT
Use
plastic
adjusting
adjustment. TP2 (CH2) See fig. 16. driver.
Standard recording
level, Refer to ‘Standard Recording Level Adjustment” on next page.
Level meter VTVM to LINE VR13 (CHI) | gyUon | At 0.42 V of LINE
Same as above. Record | VR14 (CH2)
adjustment. OUT jack. See fig. 16. VU meter.) OUTPUT.
Overall frequency. Refer to “Overall Frequency Response Adjustment” on next page.