– 27 –
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
35 – 65 g • cm
FWD
CQ-102C
(0.49 – 0.90 oz • inch)
FWD
0.5 – 5.0 g • cm
Back Tension
(0.01 – 0.07 oz • inch)
35 – 65 g • cm
REV
CQ-102RC
(0.49 – 0.90 oz • inch)
REV
0.5 – 5.0 g • cm
Back Tension
(0.01 – 0.07 oz • inch)
60 – 200 g • cm
FF, REW
CQ-201B
(0.83 – 2.78 oz • inch)
Tape Tension Measurement
Mode
Tension Meter
Meter Reading
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 31 for the
adjustment.
TAPE SECTION
Tape Speed Adjustment
Procedure :
1. Put the set into the FWD PB mode.
Specification : Constant speed
Speed checker
Frequency counter
– 1.5 to + 2.5 %
2,955 to 3,075 Hz
Adjustment Location : See page 31.
DOLBY Level Adjustment
Setting :
SHIFT button
: ON ( light up REP, SET UP
and P MODE)
Preset 9 (P MODE) button : ON ( light up P MODE
and
n
)
Preset 10 (
n
) button
: NR off
Procedure :
1. Put the set into the FWD PB mode.
2. Adjust RV101 (L-CH) and RV201 (R-CH) on main board so
that level meter reading is – 6
±
0.5 dB (0.37 to 0.41 V).
Adjustment Location : See page 31.
0 dB = 0.775 V
LINE OUT REAR
set
10 k
Ω
speed checker
or
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
main board
TP (DOLBY)
L-CH
R-CH
test tape
P-4-D400
(400 Hz, 0 dB)
level meter
set
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