WM-EX527
11
11
3-10. PINCH LEVER (N) ASSY, PINCH LEVER (R) ASSY
1
claw
2
Remove the pinch lever (R) assy
to direction of the arrow.
4
Remove the pinch lever (N) assy
to direction of the arrow.
3
claw
3-11. MAGNETIC HEAD (PLAYBACK) (HP901)
1
claw
2
Remove the magnetic head (HP901)
to direction of the arrow.
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.
(Do not bring the head demagnetizer close to the erase head.)
3. The adjustments should be performed with the rated power
supply voltage (1.3 V) unless otherwise noted.
TORQUE MEASUREMENT
Mode
Torque Meter
Meter Reading
1.57 – 2.45 mN•m
FWD
CQ-102C
(16 – 25 g•cm)
(0.23 – 0.34 oz•inch)
FWD
0.049 – 0.147 mN•m
Back Tension
CQ-102C
(0.5 – 1.5 g•cm)
(0.007 – 0.02 oz•inch)
1.57 – 2.45 mN•m
REV
CQ-102RC
(16 – 25 g•cm)
(0.23 – 0.34 oz•inch)
REV
0.049 – 0.147 mN•m
Back Tension
CQ-102RC
(0.5 – 1.5 g•cm)
(0.007 – 0.02 oz•inch)
more than 4.90 mN•m
FF, REW
CQ-201B
(more than 50 g•cm)
(more than 0.7 oz•inch)
SECTION 4
MECHANICAL ADJUSTMENTS
SECTION 5
ELECTRICAL ADJUSTMENTS
TAPE SPEED ADJUSTMENT
Setting:
PRECAUTION
1. Specified voltage
: 1.3 V (DC)
2. Switch setting
SOUND (NORM/MB/GRV): NORM (normal)
AVLS
: OFF
BL SKIP
: OFF
MODE
:
s
VOLUME
: MAX
HOLD
: OFF
TEST TAPE
Procedure:
1. Playback WS-48A (tape center) in the FWD state.
2. Adjust RV601 so that the frequency counter reading becomes
3,000 Hz.
Specificated Value: 2,970 to 3,030 Hz
3. Check that deflection of the frequency counter reading between
the beginning and the end of tape is within 1.5% (apporox. 45
Hz).
4. Playback WS-48A (tape center) in the REV state.
Check that the frequency counter reading is within 2% (approx.
60 Hz) of the reading of step 1.
Adjustment Location:
Type
Signal
Used for
WS-48A
3 kHz, 0 dB
Tape Speed Adjustment
+
–
set
Test tape
WS-48A
(3 kHz, 0 dB)
frequency counter
16
Ω
i
jack (J301)
RV601
– MAIN Board (Side B) –
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