Mechanical Adjustments; Electrical Adjustments; Standard Input Level - Sony TC-R303 Service Manual

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2-1. MECHANICAL ADJUSTMENTS

PRECAUTION
Clean the following parts with a denatured-
1.
alcohol-moistened swab:
record/playback head
erase head
capstan
2. Demagnetize the record/playback head with a
head demagnetizer.
3. Do not use a magnetized screwdriver for the
adjustments.
4. After the adjustments, apply suitable locking
compound to the parts adjusted.
5. The adjustments should be performed with the
rated power supply voltage unless otherwise
noted.
TE
L 13942296513
Torque Measurement
Torque Torque meter
CQ-102C
FWD
FWD
CQ-102C
Back tension
REV CQ-102RC
REV
CQ-102RC
Back tension
CQ-2OlB
FF, REW
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SECTION 2
ADJUSTMENTS
pinch roller
rubber belts
idler
Meter reading
30 to 70 g-cm
(0.43 to 0.97 oz-inch)
2 to 6 g-cm
(0.03 to 0.08 oz-inch)
30 to 70 g-cm
(0.43 to 0.97 oz-inch)
2 to 6 g-cm
(0.03 to 0.08 oz-inch)
90 to 160 g-cm
(1.3 to 2.2 oz-inch)
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2-2. ELECTRICAL ADJUSTMENTS

Note:
The adjustment should be performed in the
order given in this service manual.
The adjustments should be performed for both
L-CH and R-CH.
unless otherwise specified.
DOLBY NR switch:
TIMER switch:
l Standard Record:
Deliver the standard input signal level to the input
jack and set the REC LEVEL control to obtain the
standard output signal level.
- Record Mode -
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Standard Input Level

Standard Output Level
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9 4 2 8
OFF
OFF
1 5 0 5 8 2 9 9 4
LINE OUT
LINE IN
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9 9
2 8 9 9
V T V M