SHARP
SERVICE
MANUAL
$1
OUTSTANDING RECEPTION THE WORLD
OVER
ATM581
067DCK
Photograph of RT-31
H
Notice: You can make use of the item “DISASSEMBLY”,
regardless of the difference in appearance of the set,
whose photographs are all those of Model
RT-31H
(not RT-31 for SEC.)
SPECIFICATIONS
Power source:
Power consumption:
Semi-conductors:
Dimensions: Width;
Height;
Depth;
Weight:
Tape:
Tape speed
:
Wow
&
flutter:
Frequency response:
Normal tape;
(RT-31
H/HB)
Normal tape;
(RT-31)
AC 11 OV/22OV/24OV,
50160
Hz
(RT-31
H/HB)
AC
12OV,
50/60 Hz (RT-31)
12 wattes (RT-31
H/HB)
10
wattes (RT-31)
7
ICs
(Integrated Circuits)
12 Transistors
9 Diodes
6
LEDs
(Light Emitting Diodes)
430 mm (16-15116”)
1 15.5 mm
(4-9/l
6”)
237 mm
(9-5/l
6”)
3.9 kg (8.6
Ibs)
(RT-31 H/HB)
3.7 kg (8.2
Ibs)
(RT-31)
Philips standard compact cassette
tape
4.8 cm/set.
(
l-7/8
ips.)
0.19% (DIN 45 500)
0.06%
(W.R.M.S.)
(RT-31
H/HB)
0.065% (W.R.M.S.)
(RT-31)
40
-
12,500 Hz (DIN 45 500)
40-ll,OOOHz~3dB
30
-
14,000 Hz
40-12,000Hz+3dB
00
DOLBY
SYSTEM
@
Noise reduction system manufactured under license
from Dolby Laboratories Licensing Corporation.
“Dolby” and the double-D symbol are trademarks of
Dolby Laboratories Licensing Corporation.
RT-31
For
SEC)
RT-31
H
(For
SEEG,
SUK,
SCA
and
General)
RT-31
HB
For
SEW
In the interests of user-safety the set should be
restored to its original condition and only parts
identical to those specified by used.
MAXELL
UDXLII
tape;
(RT-31
H/HB)
40-14,000Hz(DIN45500)
40
-
13,000 Hz
2
3
dB
MAXELL
UDXLII
tape;
(RT-31)
30
-
15,000 Hz
40
-
13,009 Hz
f
3
dB
TDK Metal tape; 40
-
16,000 Hz (DIN 45 500)
(RT-31 H/HB)
40
-
14,000 Hz
f
3
dB
SONY
Fe-Cr
tape; 40
-
14,000 Hz (DIN 45 500)
(RT-31
H/HB)
40
-
13,000 Hz
+
3
dB
S/N ratio (MAXELL
UDXLII
tape):
Dolby
NR
off;
56
dB
Dolby
NR
on; 66
dB
(at over 5
kHz)
Input sensitivity and input impedance:
Microphones;
0.2
mV
(6.8K ohms)
Line in;
50
mV
(50K ohms)
DIN input;
0.2
mV
(6.8K
ohms) (RT-31 H/HB)
Output level and loaded impedance:
Headphones;
46
mV
(“0”
dB)
, 8 ohms
Line out; 550
mV
(“0”
dB), 50K ohms
DIN output; 550 mV
(“0”
dB), 50K ohms
(RT-31 H/HB)
Specifications are subject to change without prior notice.
SHARP
CORPORATION
SHARP
ELECTRONICS
CORPORATION
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