22
SPEAKER OUT
test tape
WS-48A
(3 kHz, 0 dB)
set
4
Ω
speed checker
or
frequency counter
PRECAUTION
1. Wipe the following components with an absorbent cotton cloth
moistened with alcohol before adjustment :
PB head
Pinch roller
Idler
Rubber belt
Capstan
2. Demagnetize the PB head using a head demagnetizer.
3. Be careful not to use a magnetized screwdriver.
4. After the adjustment is completed, lock the adjustment parts
using screws.
5. Unless otherwise specified, make adjustments at the specified
voltage (14.4V).
Torque Measurement
Mode
Torque Meter
Meter Reading
39.3 – 78.4 mN • m
FWD
40 – 80 g • cm
CQ-102C
(0.56 – 1.11 oz • inch)
0.05 – 0.49 mN • m
FWD
0.5 – 5.0 g • cm
Back Tension
(0.01 – 0.07 oz • inch)
39.3 – 78.4 mN • m
REV
40 – 80 g • cm
CQ-102RC
(0.56 – 1.11 oz • inch)
0.05 – 0.49 mN • m
REV
0.5 – 5.0 g • cm
Back Tension
(0.01 – 0.07 oz • inch)
4.91 – 17.65 mN • m
FF, REW
CQ-201B
50 – 180 g • cm
(0.7 – 2.5 oz • inch)
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
more than 558.4 mN
FWD
CQ-403A
more than 60 g
REV
CQ-403R
(more than 2.12 oz)
SECTION 5
ELECTRICAL ADJUSTMENTS
SECTION 4
MECHANICAL ADJUSTMENTS
See the adjustment location from on page 25 for the adjust-
ment.
TAPE SECTION
Tape Speed Adjustment
Procedure :
1. Put the set into the FWD PB mode.
Specification : Constant speed
Speed checker
Frequency counter
–1 to + 3 %
2,970 to 3,090 Hz
Adjustment Location : See page 25.
0 dB = 0.775 V
DOLBY Level Adjustment
Setting :
set
level meter
test tape
P-4-D400
(400 Hz, 0 dB)
main board
TP (DOLBY)
L-CH
R-CH
Procedure :
1. Put the set into the FWD PB mode.
2. Adjust RV402 (L-CH) and RV401 (R-CH) so that level meter
reading is –6.2 ± 1 dB (0.34 to 4.34 V).
Adjustment Location :
-MAIN BOARD (SIDE B)-
TP
(RCH)
RV401
RV402
TP
(LCH)
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