Sony TC-W345 - Page 4

SECTION 2
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-
moistened swab:
record/playback head pinch roller
erase head rubber belts
capstan idlers
Torque Measurement
Bae
a
nel
motes
fesding
wo
|
:
30—
70
g*cm
athe
aes
(0.42
—
0.97
oz
«
inch)
FWD
CQ-102RC
p
PE
SREW
CQ-201B
1.5—7g*¢cm
(0.020 — 0.096 oz « inch)
63 g * cm or more
(0.87 oz « inch or more)
SECTION 3
ELECTRICAL ADJUSTMENTS
1. Demagnetize the record/playback and erase head with a
head demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to
the parts adjusted.
4, The adjustments should be performed with the rated
power supply voltage unless otherwise noted.
5. The adjustments should be performed in the order given
in this service manual. (As a general rule, playback
circuit adjustment should be completed before performing
recording circuit adjustment.)
6. The adjustments should be performed for both L-CH and
R-CH.
e Switches and controls should be set as follows unless
otherwise specified.
DOLBY NR switch: OFF
TAPE select switch: TYPE 1 (NORMAL)
(DECK-B)
Mode: record —
AF OSC
6002 jing IN LINE OUT
315Hz
[ipattsel | 108)
RECORD/PLAYBACK HEAD AZIMUTH
ADJUSTMENT|DECK A/DECK B
Procédure:
1. Mode: FWD playback
test tape
P-4-A100
(10kHz, — 10dB)
R-CH
LINE OUT
2. Turn the adjustment screw and check output peaks. If the
peaks do not match for L-CH and R-CH, turn the
adjustment screw so that outputs match within 1 dB of
peak.
output
level
within 1 dB
L-CH R-CH
peak peak
Screen pattern
—~ screw position
O@OO®Q®
: h 45° é 3 ‘i
in phase 90 135° 180
good wrong
3. After the adjustments, apply suitable locking compound to
the parts adjusted.
Adjustment Location:
FWD REV
rere eran yoteemenerereemaneensd
Adjustment screw
TAPE SPEED ADJUSTMENT/|DECK A/DECK B
Procedure:
Mode: FWD playback
speed checker or
digital frequency
test tape
WS-48B counter
3kHz, OdB
esaee 47kO
SE walk
LINE OUT
1. Connect pin to with the lead wire. (CNP505)
Measurement limit : high speed
Speed checker Digital trequency conter
0+0.3% 5960 + 20Hz
Frequency difference between the beginning and the end of
the tape should be within 1.5% (90Hz).
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