Sharp RT-31 Service Manual

OUTSTANDING RECEPTION THE WORLD OVER
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.)
Power source:
Power consumption:
Semi-conductors:
Dimensions: Width;
Height;
Depth;
Weight:
Tape:
Tape speed :
Wow & flutter:
Frequency response:
Normal tape;
Normal tape;
Photograph of RT-31 H
AC 11 OV/22OV/24OV, 50160 Hz
(RT-31 H/HB)
AC 12OV, 50/60 Hz (RT-31)
12 wattes (RT-31 H/HB)
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)
30 - 14,000 Hz
Noise reduction system manufactured under license
f r o m D o l b y L a b o r a t o r i e s L i c e n s i n g C o r p o r a t i o n .
"Dolby" and the double-D symbol are trademarks of
Dolby Laboratories Licensing Corporation.
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;
40 - 13,000 Hz 2 3 dB
MAXELL UDXLII tape;
30 - 15,000 Hz
40 - 13,009 Hz f 3 dB
TDK Metal tape; 40 - 16,000 Hz (DIN 45 500)
40 - 14,000 Hz f 3 dB
(RT-31 H/HB)
SONY Fe-Cr tape; 40 - 14,000 Hz (DIN 45 500)
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
Specifications are subject to change without prior notice.
(RT-31 H/HB)