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SECTION 3
MECHANICAL ADJUSTMENTS
SECTION 4
ELECTRICAL ADJUSTMENTS
Tension Meter
Meter Reading
CQ-403A
more than 100 g (3.53 oz)
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab:
record/playback head
pinch roller
erase head
rubber belts
capstan
idlers
2. Demagnetize the record/playback head with a head demagne-
tizer. (Do not bring the head demagnetizer close to the erase
head.)
head.)
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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.
6. Power supply voltage: 12V dc.
Torque Measurement
Tape Tension Measurement
Mode
Torque Meter
Meter Reading
Playback
CQ-102C
30 – 75 g•cm
(0.42 – 0.98 oz•inch)
Back tension
CQ-102C
1.5 – 6 g•cm
(0.021 – 0.084 oz•inch)
Rewind
CQ-201B
50 – 130 g•cm
Fast foward
(0.834 – 1.874 oz•inch)
TAPE DECK SECTION
0 dB=0.775 V
1. The adjustments should be perfomed in the order given in the
service manual. (As a general rule. Playback circuit adjust-
ment should be completed before performing recording cir-
cuit adjustment.)
ment should be completed before performing recording cir-
cuit adjustment.)
2. The adjustments should be performed for both L-ch and R-ch
unless otherwise indicated.
•
Switch and control position
FUNCTION switch ........................................................ TAPE
MEGA BASS control .............................................. minimum
VOLUME control ................................................... maximum
BALANCE control .................................... mechanical center
KARAOKE MODE switch .............................................. OFF
FUNCTION switch ........................................................ TAPE
MEGA BASS control .............................................. minimum
VOLUME control ................................................... maximum
BALANCE control .................................... mechanical center
KARAOKE MODE switch .............................................. OFF
Standard Output Level
Test Tape
Record/Playback Head Azimuth Adjustment
Procedure:
1. Mode: FWD/REV playback (DECK A)
1. Mode: FWD/REV playback (DECK A)
FWD playback (DECK B)
2. Turn the adjustment screw for the maximum output levels. If
these levels do not match, turn the adjustment screw until both
of output levels match together within 1 dB.
of output levels match together within 1 dB.
SP OUT
PHONES
Load impedance
3.2
Ω
32
Ω
Output level
0.775 V (0 dB)
0.25 V (–10 dB)
Type
Signal
Used for
WS-48B
3 kHz, 0 dB
Tape speed adjustment
P-4-A063
6.3 kHz, –10 dB
Head azimuth adjustment
+
–
–
test tape
P-4-A063
(6.3 kHz, –10 dB)
P-4-A063
(6.3 kHz, –10 dB)
set
32
Ω
PHONES jack (J301)
level meter
L-CH
peak
peak
L-CH
peak
peak
R-CH
peak
peak
R-CH
peak
peak
Screw
position
position
output
level
level
within
1 dB
1 dB
within
1 dB
1 dB
Screw
angle
angle
DECK-B
DECK-A
DECK-B
DECK-A
DECK-B
DECK-A
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