Sony XR-CA400 / XR-CA420X Service Manual ▷ View online
10
XR-CA400/CA420X
SECTION 3
ASSEMBLY OF MECHANISM DECK
HOUSING
ARM (SUCTION)
Note:
Follow the assembly procedure in the numerical order given.
A
part
C
part
B
part
D
part
8
Hold the hanger by
bending the claw.
bending the claw.
6
Fit projection on D part.
4
Fit claw on B part.
3
Put the housing
under A part.
under A part.
5
Fit projection on C part.
1
Install the catch to the hanger.
2
Install the hanger onto
two claws of the housing.
two claws of the housing.
7
Hold the hanger by bending the claw.
hanger
housing
2
Move the arm (suction) in the arrow
direction and fit on projection.
direction and fit on projection.
1
Fit the arm (suction) on the shaft.
projection
11
XR-CA400/CA420X
LEVER (LDG-A) / (LDG-B)
GEAR (LDG-FT)
shaft A
shaft B
shaft C
1
Fit the lever (LDG-A) on
shafts A – C and install it.
shafts A – C and install it.
shaft A
shaft B
2
Fit the lever (LDG-B) on
shafts A and B and
install it.
shafts A and B and
install it.
3
type-E stop ring 2.0
gear (LDG-D)
5
gear (LDG-FT)
6
polyethylene washer
2
tension spring (LD-2)
2
tension spring (LD-1)
gear (LDG-FB)
lever (LDG-A)
hole
hole
4
Align hole in the gear (LDG-D)
with hole the lever (LDG-A).
with hole the lever (LDG-A).
3
Move the lever (LDG-B)
in the arrow direction.
in the arrow direction.
1
12
XR-CA400/CA420X
GUIDE (C)
MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901)
2
guide (C)
1
three claws
two precision screws
(P2
(P2
×
2)
Note: Mount the motor so that the
angle between of the
motor and the hole for the
screw becomes 30
motor and the hole for the
screw becomes 30
°
as
shown in this figure.
capstan/reel motor
(M901)
(M901)
30˚
13
XR-CA400/CA420X
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
1. Put the set into the FWD PB mode.
2. Adjust adjustment resistor for inside capstan motor so that the
reading on the frequency counter becomes 3,000 Hz.
Specification: Constant speed
Adjustment Location:
Tape Speed Adjustment
– SET UPPER VIEW –
SECTION 4
MECHANICAL ADJUSTMENTS
• Tape Tension Measurement
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
pinch roller
rubber belt
capstan
idler
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply
3. Do not use a magnetized screwdriver for the adjustments.
4. The adjustments should be performed with the power supply
voltage (14.4 V) unless otherwise noted.
• Torque Measurement
Mode
Torque Meter
Meter Reading
2.95 – 6.37 mN•m
Forward
CQ-102C
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
Forward
0.05 – 0.44 mN•m
CQ-102C
(0.5 – 4.5g•cm)
Back Tension
(0.01 – 0.06 oz•inch)
2.95 – 6.37 mN•m
Reverse
CQ-102RC
(30 – 65 g•cm)
(0.42 – 0.90 oz•inch)
Reverse
0.05 – 0.44 mN•m
CQ-102RC
(0.5 – 4.5g•cm)
Back Tension
(0.01 – 0.06 oz•inch)
5.89 – 19.61 mN•m
FF, REW
CQ-201B
(60 – 200 g•cm)
(0.83 – 2.78 oz•inch)
Mode
Tension Meter
Meter Reading
Forward
CQ-403A
more than 60 g
(more than 2.12 oz)
Reverse
CQ-403R
more than 60 g
(more than 2.12 oz)
SECTION 5
ELECTRICAL ADJUSTMENTS
0 dB=0.775 V
Tape Speed Adjustment
Setting:
Frequency counter
2,955 to 3,075 Hz
TAPE DECK SECTION
frequency counter
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
set
AUDIO OUT jack (J331)
–
+
10 k
Ω
TUNER SECTION
Tuner section adjustments are done automatically in this set.
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