Table of Contents
Advertisement
QQ
MECHANICAL ADJUSTMENTS
3 7 63 1515 0
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads
erase head
capstan
2. Demagnetize the record/playback head with a head demagne-
tizer.
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 sup-
ply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
TE
L 13942296513
www
.
http://www.xiaoyu163.com
SECTION 4
pinch rollers
rubber belts
idlers
Torque meter
Meter reading
31 to 71 g • cm
CQ-102C
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
CQ-102C
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
CQ-102RC
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
CQ-102RC
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
CQ-201B
(0.98 – 1.99 oz • inch)
100 g or more
CQ-403A
(3.53 oz or more)
100 g or more
CQ-403R
(3.53 oz or more)
x
ao
u163
y
i
http://www.xiaoyu163.com
ELECTRICAL ADJUSTMENTS
2 9
8
DECK SECTION
1. Demagnetize the record/playback head with a head damagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjusted.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit adjust-
ment.)
6. The adjustments should be performed for both L-CH and R-CH.
7. Switches and controls should be set as follows unless otherwise
specified.
Tape
P-4-A100
WS-48B
P-4-L300
Record/Playback Head Azimuth Adjustment
(Deck A, Deck B)
Note: Perform this adjustments for both decks.
Procedure:
1. Mode : Playback
Q Q
3
6 7
test tape
1 3
1 5
P-4-A100
(10kHz, –10dB)
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 1 dB of peak.
L-CH
output
peak
level
R-CH
peak
screw
position
co
.
SECTION 5
9 4
2 8
0 dB=0.775V
Signal
Used for
10 kHz, –10 dB
Azimuth Adjustment
3 kHz, 0 dB
Tape Speed Adjustment
315 Hz, 0 dB
Level Adjustment
0 5
8
2 9
9 4
2 8
MD OUT
(J101)
level meter
set
+
–
within
1 dB
m
L-CH
R-CH
peak
peak
9 9
9 9
within 1dB
screw
position
15
Advertisement
Table of Contents
