Test Mode; Mechanical Adjustments; Electrical Adjustments - Sony CFM-S1 Service Manual

CFM-S1

3-1. MECHANICAL ADJUSTMENTS

PRECAUTION
1.Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
erase head
capstan
2.Demagnetize the record/playback head with a head demagnetizer.
(Do not bring the head demagnetizer close to the erase head.)
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 sup
ply voltage unless otherwise noted.
Torque Measurement
Torque Torque Meter
Forward CQ-102C
Forward
CQ-102C
Back Tension
Fast Forward CQ-201B
Rewind CQ-201B
Tape Tension Measurement
Torque Meter
CQ-403A
6
SECTION 3

TEST MODE

pinch roller
rubber belts
Meter Reading
1.77 to 5.88 mN•m
(18 to 60 g•cm)
(0.25 to 0.83 oz•inch)
0.01 to 0.49 mN•m
(1 to 5 g•cm)
(0.014 to 0.069 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch)
4.42 to 9.31 mN•m
(45 to 95 g•cm)
(0.63 to 1.31 oz•inch )
Meter Reading
more than 100g
(more than 3.53 oz)

3-2. ELECTRICAL ADJUSTMENTS

TAPE RECORDER SECTION
FUNOTION switch
SOUND switch
VOLUME
Standard Output Level
Output terminal
load impedance
output signal level 0.25V (–10dB)
Test Tape
Type Signal
WS-48A 3kHz, 0dB
Record/Playback Head Azimuth Adjustment
Procedure :
1.Playback Mode
test tape
P-4-A100
(10kHz, -10dB)
set
2.Rotate the screw to adjust level meter reading to the maximum.
Note :
Adjust to the maximum peak though there may be two or
three peakes
3.After the adjustment, lock the adjustment screws with suitable
locking compound.
Adjustment Location :
Head azimuth adjustent screw
0dB=0.775V
: TAPE (RADIO OFF)
: OFF
: MIN
Earphone Speaker
8Ω 6Ω
0.775V (0dB)
Used for
Tape Speed Adjustment
level meter
8 Ω
+
J101 (Earphone jack)