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ADJUSTMENT OF PINCH ROLLER
Tape:
Recording system:
,Erasing system:
Tape speed:
Rewind
81
Fast
forward time:
Wow
81
Flutter
Bias frequency:
Distortion
Frequency response:
Signal t o noise ratio:
Terminal impedance:
(Input)
(Output)
Power source
Dimensions:
Weight:
Chromium dioxide or normal cassette tape
AC bias, 114 track stereo
AC erase, 112 track
1-718 ips. (4.75 cmlsec.)
9 0 sec. (C-60)
0.1 5% RMS
67
-
73 KHz
Less than 1% (1 KHz, -60dB)
30
-
13,000Hr (Normal tape)
30
-
16,000Hz (Chromium dioxide tape)
Dolby N.R.
OFF: 50dB
ON : 58dB
MIC: 10K ohms (0.25mV)
L l N E IN: 60K ohms (63mV)
RECIPB: 10K ohms (1mV)
L l N E OUT: 5K ohms (500mV)
RECIPB: 5K ohms (500mV)
HEADPHONE: 8
-
10K o h m
AC: 120120012201240V 50160Hz (RD4080)
11011251220V 50160Hr (RD4080UM)
240V 50160Hz (RD4080AUST.).
15-114"(W)
x
10"(D)
x
4-318"(H)
(386 x 2 5 6 x l l l m m )
Approx. 8 Ibs. 2 02s. (3.7Kg)
1. Set the unit t o the P L A Y mode.
2. Apply a tension gauge t o the pinch roller. Read the gauge a t the
precise moment when the pinch rolier separates f r o m the capstan.
3. I f the gauge reading is within a range of more than 200 g, noadjust-
ment is necessary. I f otherwise, make adjustment b y changing the
force of the spring coil. (See exploded view No. 23)
TORQUE ADJUSTMENT
1. Set the unit t o the PLAY, FAST FORWARD or REWIND mode.
2. Measure the each torque w i t h a torque gauge. They should be as
following;
P L A Y
30
-
6 0 glcm
FAST FORWARD
55
-
110 glcm
REWIND
55
-
110 glcm
3. I f the each torque fails to reach the standard value. Clean the drive
belt, flywheel, motor pulley, take-up reel, idler and rewind roller
w i t h a cotton swab soaked in alcohol.
AUTO SHUT-OFF ADJUSTMENT
1. Set the unit t o the P L A Y mode.
2. Apply a tension gauge t o the sensor. Push the gauge and measure
the sensor pressure.
3. The sensor pressure should be 30
-
50 g.
4. I f a sensor pressure of more than 50 g, or less than 30
g,
adjust the
spring coil (See exploded view No. 25).
PARTS LOCATION
D302
+
Q103
Q105 Q106
1
0
-
0803
0 0
D802
t
) ~ 8 0 1
Q202
Q102
+
SVR201
0 0
E B
Q201
Q l 01
SVRlOl
(2206
B
0
0 0
Q 2 0 5
a
SVR203
0
@
D806
SVR103
SVR202
- 0
Q203
S V R 8 0 1 0
4 z
Q104
a
Q204
0
0
SVRlO2
SVRBO2
0
RECORD
-
PLAY
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