— 5 —
SECTION 3
MECHANICAL ADJUSTMENT
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab :
playback head
pinch roller
capstan
rubber belt
2.
Demagnetize the playback head with a head demagnetizer.
3.
Do not use a magnetized screwdriver for the adjustments.
4.
The adjustments should be performed with the rated power
supply voltage (DC 3.0 V) unless otherwise noted.
Torque Measurement
SECTION 4
ELECTRICAL ADJUSTMENT
PRECAUTION
• Supplied voltage
: 3.0 V
• Switch and control position
VOL control
: mechanical mid
PAUSE switch : OFF
Test tape
REC/PB Head Azimuth Adjustment
Procedure :
1.
Model : playback
2.
Turn the adjustment screw to obtain the maximum readig on
level meter.
Note
: Several peaks may appear, but take the maximum.
Adjustment Location :
Tape Speed Adjustment
Procedure :
1.
Playback WS-48A (tape center part) in the FWD state and adjust
RV601 so that the frequency counter reading becomes
3,000 Hz.
Specification Value :
2.
Check that frequency counter reading is within 2% of reading
of step 1.
Digital frequency counter
2,970 to 3,030 Hz
Type
WS-48A
P-4-A063
Signal
3 kHz, 0 dB
6.3 kHz, - 10dB
Used for
tape speed adjustment
head azimuth adjustment
Mode
Torque Meter
Meter Reading
more than 1.96 mN • m
(more than 20 g • cm)
(more than 0.28 oz • inch)
more than 4.90 mN • m
(more than 50 g • cm)
(more than 0.69 oz • inch)
0.05 – 0.29 mN • m
(0.5 – 3 g • cm)
(0.007 – 0.04 oz • inch)
FWD
CQ-102C
FWD
back tension
FF, REW
CQ-201B
+
–
test tape
WS-48A
(3 kHz, 0 dB)
set
EAR jack (J102)
32
Ω
frequency counter
RV601
Adjustment Location : main board (conductor side)
+
–
test tape
P-4-A063
(6.3 kHz, -10 dB)
set
EAR jack (J102)
10 k
Ω
level meter
adjustment screw
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
