Pioneer KEX-70 Service Manual

The photo shows the model KEX-73
) PIONEER
ORDER NO.
CRT - 254-0
CASSETTE CAR STEREO WITH AM/FM ELECTRONIC TUNER
SPECIFICATIONS
General
Power source.......... DC14.4V (10.8 ~ 15.6V allowable)
Grounding system ......... 000 cece ee eee Negative type
Dimensions (chassis)......... 180(W) x 50(H) x 150(D) mm
(Front face)........ 184(W) x 56(H) x 31(D) mm
WIG a 5:6 ores owed Selma i ewe Waid sR ehis a eva ee 2.0kg
Tone controls (bass) ......... 00.00 ce eee +10 dB (100 Hz)
(treble) ...............005 + 10dB (10 kHz)
Loudness contour........ +12 dB (100 Hz), +4 dB (10kHz)
(volume: —30 dB)
Maximum outputlevel ........... 0.0.0 .c cea eaee 200 mV
Output impedance. ......... 0... cc cece eee eae 1kQ
Tape player
WAPGy he ee var eele wees Compact cassette tape (C-30 ~ C-90)
Tape speed .... 0... cece ee eee eee one 4.76 cm/sec.
(+ 0.19 cm/sec. -0.05 cm/sec.)
Fast forward/rewind time ......... Within 120 sec. for C-60
Wow & flutter............. No more than 0.09% (WRMS)
Frequency response...... 30 ~ 20,000 Hz (+3 dB) (at meta!)
30 ~ 16,000 Hz (+3 dB) (at normal)
Stereo separation............. 000 c eee More than 40 dB
Signal-to-noise ratio ........ Dolby NR IN: More than 63 dB
(IEC-A network)
Dolby NR OUT: More than 55 dB
(IEC-A network)
FM tuner
Frequency range. ....... 2. cece ee ees 87.5 ~ 108 MHz
Usable sensitivity ............. 12 dBf (1.14V/752, mono)
50 dB quieting sensitivity ....... 17 dBf (1.94V/75Q, mono)
Alternate channel selectivity............ 70 dB (+400 kHz)
Distortion ...............- 0.3% (at 65 dBf, 1kHz, stereo)
Frequency response.............. 30 ~ 15,000 Hz (+3 dB)
Stereo separation .............0.0. 40 dB (at 65 dBf, 1kHz)
AM (MW) tuner
Frequency range ........2 cece cece aee 531 ~ 1,602 kHz)
Usable sensitivity ...... 18uV (25 dB) (S/N: 20 dB) (KEX-70)
Usable sensitivity. ... . 30yV (29.5 dB) (S/N: 20 dB) (KEX-73)
Selectivity. ........ cc ccc cece ee eee 50 dB (+9 kHz)
LW tuner (KEX-73)
Frequency range ..........0e cece eee 153 ~ 281 kHz
Usable sensitivity ............. 70uV (37 dB) (S/N: 20 dB)
SEC. i wie ier mcmesiaawianearass 50 dB (+9 kHz)
Note:
Specifications and the design are subject to possible
modification without notice due to improvements.
¢ 'Dolby' and the double-D symbol are trademarks of Dolby Laboratories Licensing
corporation.
¢ Noise Reduction System manufactured under license from Dolby Laboratories
Licensing Corporation.
PIONEER ELECTRONIC CORPORATION 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS OF AMERICA 1925 €, Dominguez St. Long Beach; Calif. 30810
PIONEER ELECTRONIC (EUROPE) N.V. Luithagen-Haven 9, 2030 Antwerp, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Austrailia
E K © APR. 1981 Printed in Japan