Sony XR-C7350X Service Manual ▷ View online
9
SECTION 4
ASSEMBLY OF MECHANISM DECK
HOUSING
ARM (SUCTION)
Note:
Follow the assembly procedure in the numerical order given.
7
Holder the hanger by bending the claw.
A
part
C
part
B
part
D
part
8
Hold the hanger by
bending the claw.
6
Fit projection on
D
part.
4
Fit claw on
B
part.
3
Put the housing
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.
hanger
housing
2
Move the arm (suction) in the arrow
direction and fit on projection.
1
Fit the arm (suction) on the shaft.
projection
10
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.
shaft
A
shaft
B
2
Fit the lever (LDG-B) on
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).
3
Move the lever (LDG-B)
in the arrow direction.
1
11
GUIDE (C)
2
guide (C)
1
three claws
MOUNTING POSITION OF CAPSTAN/REEL MOTOR (M901)
two precision screws
(P2
(P2
×
2)
capstan/reel motor
(M901)
(M901)
30˚
12
SECTION 5
MECHANICAL ADJUSTMENTS
1. Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
pinch roller
rubber belt
capstan
idlers
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
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 power supply
voltage unless otherwise noted.
•
Torque Measurement
Mode
Tension Meter
Meter Reading
more than 0.88 N
Forward
CQ-403A
more than 90 g
(more than 3.18 oz)
more than 0.88 N
Reverse
CQ-403R
more than 90 g
(more than 3.18 oz)
•
Tape Tension 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
Back Tension
CQ-102C
0.5 – 4.5 g•cm
(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
Back Tension
CQ-102RC
0.5 – 4.5 g•cm
(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)
set
+
–
test tape
WS-48A
(3 kHz, 0 dB)
WS-48A
(3 kHz, 0 dB)
AUDIO OUT jack (J331)
10 k
Ω
speed checker
or
frequency counter
TUNER SECTION
0 dB=1 µV
The tuner section has no adjustment.
Adjustment Location:
– SET UPPER VIEW –
Tape Speed Adjustment
SECTION 6
ELECTRICAL ADJUSTMENTS
6-1. TEST MODE
<Set the Test Mode>
1. Set the “OFF” mode.
2. Push the preset
1. Set the “OFF” mode.
2. Push the preset
[4]
button.
3. Push the preset
[5]
button.
4. Press the preset
[1]
button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.
<Release the Test mode>
1. Push the [OFF] button.
1. Push the [OFF] button.
0 dB=0.775 V
Speed checker
Frequency counter
–1.5 to +2.5%
2,955 to 3,075 Hz
TAPE DECK SECTION
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 speed checker or frequency counter becomes in
specification.
specification.
Specification: Constant speed
Tape Speed Adjustment
Setting:
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