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MECHANICAL ADJUSTMENTS
3 7 63 1515 0
1.
Clean the following parts with a denatured-alcohol-moistened
swab :
record/playback head
erase head
capstan
2.
Demagnetize the record/playback head with a head
demagnetizer. (Do not bring the head magnetizer close to the
erase head.)
3.
Do not use a magnetized screwdriver for the adjustments.
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
5.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD
Back Tension
FF
REW
TE
L 13942296513
Tape Tension Measurement
Mode
FWD
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.
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SECTION 4
PRECAUTION
pinch roller
rubber belts
idlers
Torque Meter
Meter Reading
2.95 – 6.86 mN•m
CQ-102C
(30 – 70 g•cm)
(0.42 – 0.97 oz•inch)
0.15 – 5.39 mN•m
CQ-102C
(1.5 – 5.5 g•cm)
(0.021 – 0.076 oz•inch)
more than 5.89 mN•m
CQ-201B
(more than 60 g•cm)
(more than 0.83 oz•inch)
more than 5.89 mN•m
CQ-201B
(more than 60 g•cm)
(more than 0.83 oz•inch)
Torque Meter
Meter Reading
CQ-403A
more than 100 g
(more than 3.53 oz)
x
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y
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ELECTRICAL ADJUSTMENTS
8
1.
Setting
MEGA BASS switch : OFF
TAPE DECK SECTION
Test tape
Type
WS-48A
P-4-A063
Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
Q Q
L-CH
3
6 7
1 3
peak
Screw
position
3.
Mode: Playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
4.
After the adjustments, apply suitable locking compound to the
u163
parts adjusted.
.
SECTION 5
2 9
9 4
2 8
PRECAUTION
0 dB=0.775 V
Signal
3 kHz, 0 dB
Tape Speed Adjustment
6.3 kHz, –10 dB
Head Azimuth Adjustment
level meter
32 Ω
set
HEADPHONE board
PHONES jack (JK401)
within
1 5
0 5
1dB
8
2 9
9 4
Output
level
R-CH
peak
L-CH
R-CH
peak
peak
32 Ω
L-CH
set
32 Ω
R-CH
HEADPHONE board
PHONES jack (JK401)
screen pattern
45 °
90 ° 135 ° 180 °
in phase
good
wrong
m
co
HCD-EP305
9 9
Used for
+
–
2 8
9 9
within
1dB
Screw
position
oscilloscope
V
H
+ +
– –
11
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