WM-EX527
1111
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 cla
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 counte
16
Ω
i
jack (J301)
RV601
– MAIN Board (Side B) –
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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