Adjustments; Mechanical Adjustments; Electrical Adjustments - Sony M-100MC User Manual

3-1. MECHANICAL ADJUSTMENTS

PRECAUTION
1. Before adjusting, clean the following parts with a piece of cot-
ton moistened with alcohol.
record/playback/erase head
rubber belt
2. Demagnetize the record/playback/erase head using a head de-
magnetizer.
3. Do not use a magnetized screwdriver for adjustments.
4. After adjusting, apply screw-locking compound to the adjusted
parts.
5. Unless specified otherwise, use a specified voltage (3V DC) to
perform the adjustments.
Torque Measurement
Tape Speed switch : 2.4cm
Mode Torque Meter
Forward CQ-103M
Fast Forward CQ-201M
Rewind CQ-201M
Tape Tension Measurement
Tape Speed switch : 2.4cm/s
Mode Torque Meter
FWD CQ-403M
SECTION 3

ADJUSTMENTS

pinch roller
capstan
Meter Reading
5 – 13 g • cm
(0.07 to 0.180 oz• inch)
5 – 13 g • cm
(0.07 to 0.180 oz• inch)
more than 20 g • cm
(more than 0.28 oz• inch)
Meter Reading
more than 30 g
(more than 1.06 oz)
– 6 –

3-2. ELECTRICAL ADJUSTMENTS

Standard Output Level
Output terminal EAR
Load impedance 10kΩ
Output level 78mV (– 20dB)
Test Tape
Type Signal
S-2-A030A 3kHz, –20dB Azimuth Adjustment
WS-24
3kHz, –10dB Tape Speed Adjustment
WS-12
0dB=0.775V
Record/Playback/Erase Head Azimuth Adjustment
Switch position
VOL control : Mechanical center
TAPE SPEED switch : 2.4cm
VOR switch : OFF
Procedure :
– FWD/REV playback –
test tape
S-2-A030A
(3kHz, –20dB)
set
• Rotate the screw to adjust level meter reading to the maximum.
Note : Adjust to the maximum peak though ther may be two or
three peaks
Adjustment Location :
First remove the cover
(azimuth)
Tape speed
Used for
(cm/s)
2.4
2.4
1.2
level meter
10k Ω
EAR jack
head azimuth
adjustment screw