WM-EX621
12
PRECAUTION
1.
Specified voltage: 1.3 V (DC)
2.
Switch position (MENU)
AVLS
: OFF
BL SKIP
: OFF
MB/RV GRV : OFF
Test Tape
Tape Speed Adjustment
Procedure:
1.
Enter the FWD playback mode.
2.
Adjust RV601 so that the value of the frequency counter reading
becomes 3,000 Hz.
Specification value:
Frequency counter
2,970 Hz – 3,030 Hz
3.
Check that the frequency deviation at the beginning and ending
of a tape is within 1.5 % (45 Hz).
Adjustment Point:
[MAIN BOARD]
— SIDE B —
PRECAUTION
1.
Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
pinch roller
rubber belts
capstan
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 unless otherwise noted.
• Torque Measurement
Mode
FWD
FWD
Back Tension
REW
REW
Back Tension
FF, REW
Torque Meter
CQ-102D
CQ-102D
CQ-102C
CQ-102C
CQ-201B
Meter Reading
14.7 to 24.5 mN•m
(15 to 25 g•cm)
(0.22 to 0.34 oz•inch)
0.294 to 1.96 mN•m
(0.3 to 2.0g•cm)
(0.007 to 0.020 oz•inch)
14.7 to 24.5 mN•m
(15 to 25 g•cm)
(0.22 to 0.34 oz•inch)
0.294 to 1.96 mN•m
(0.3 to 2.0 g•cm)
(0.007 to 0.020 oz•inch)
More than 34.3 mN•m
(More than 35 g•cm)
(More than 0.69 oz•inch)
SECTION 4
MECHANICAL ADJUSTMENT
SECTION 5
ELECTRICAL ADJUSTMENT
‘
RV601
Signal
3 kHz, 0 dB
Used for
Tape Speed Adjustment
Tape
WS-48A
Test tape
WS-48A
(3kHz, 0dB)
Set
2
REMOTE jack (J301)
16
Ω
Frequency counter
+
–
