Jvc A X3 Service Manual

Page 1

K3313

STEREO INTEGRATED AMPLIFIER

No. 2508
Nov. 1979

Page 2

Contents

Pages
1 Specifications ......................................................................... 1
2. Removal Procedures of Top Cover and Front Panel ................................................ 2
3. Main Parts Location ..................................................................... 2
4. Exploded Views and Part Numbers
4-(1) Front Panel ................................................................... 3
4-(2) Rear Panel .................................................................... 3
4-(3) Chassis Base Ass'y ............................................................... 4
5. Block Diagram ........................................................................ 5
6. New Technology
6-(1) New Development of IC in Super A Circuit .............................................. 6
6-(2) DC Servo Type Equalizer Circuit with EL FET ............................................ 6
7. Power Amplifier Adjustment Procedures
7-(1) Center Voltage ................................................................. 7
7-(2) Idling Current .................................................................. 7
8. Printed Circuit Board Ass'y and Parts List
8-(1) TDS-5 LED Power Supply ....................................................... 8
8-(2) TXX-215 Power Amp., Power Supply and Speakers ......................................... 8
8-(3) TXX-216 Equalizer Amp. and Source Selector ........................................... 11
8-(4) TPS-234 AC Socket ............................................................ 12
8-(5) TPS-255 AC Fuse ........... ' .................................................. 1 2
8-(6) TAP-281 Driver Amp ............................................................ 14
9. Packing Materials and Part Numbers ......................................................... 16
10. Accessories List. ...................................................................... 16
11.. A-X3 Schematic Diagram ................................................................ 17
12. Parts List with Specified Numbers for Designated Areas ............................................ 19

Warning: When replacing the parts marked with [A , be sure to use the designated parts to ensure safety.

1

Overall Specifications
Output Power
(TUNER, AUX, TAPE

Total Harmonic Distortion :
(TUNER, AUX, TAPE

_ Specrflcatlons Input Sensitivity/ Impedance
Phono (MM) : 2.5 mV/47 k9
Phono (MC) 2 200 LIV/100 $2
TUNER, AUX, TAPE 2 150 mV/47 k R

Signal-to-Noise Ratio

:55 watts per channel min. RMS
(both channels driven, into 8 $2

-> SF. OUT) from 20 Hz to 20 kHz with no Phono (MM) : 84 dB (IHF, A net, short circuit)
more than 0.005% THD) 83 dB (new IHF)
57 watts per channel min. RMS Phono (MC) : 67 dB (lHF, A net, short circuit)

(both channels driven, into 8 $2
at 1 kHz)

0.005% at rated output, from
20 Hz to 20 kHz, 8 $2

76 dB (new IHF)
TUNER, AUX, TAPE : 109 dB (IHF, A net, short cir-
cuit), 83 dB (new IHF)
Tone Controls

-r SP. OUT) 0.001% at rated output 1 kHz, BASS : :8 dB (100 Hz)
89 TREBLE :t8dB(10 kHz)
(Measured by HP Audio Analyzer Muting ; -20 dB
System) Phono Equalizer Section (Phono -* REC. OUT)
0.02% at rated output, from Phono Overload

20 Hz to 50 kHz, 8 Q
lntermodulation Distortion : 0.004% at rated output, 8 $2
(TUNER, AUX, TAPE

~> SP. OUT)
Power Band Width
(TUNER, AUX, TAPE

-> SP. OUT)

:5 Hz - 60 kHz (IHF, both chan-
nels driven, 852, 0.02% THD)

+0

Phono (MM) 220 mV at 1 kHz, 0.005% THD

Phono (MC) 15 mV at 1 kHz, 0.005% THD
RIAA Phono Equalization

(MM) :i0.3 dB (20 Hz - 20 kHz)

(MC) 1:0.5 dB (30 Hz - 20 kHz)

EO Subsonic Filter : -6 dB/Oct. (18 Hz)
Total Harmonic Distortion

Frequency Response : DC - 100 kHz _3 dB Phono (MM) : 0.005% at 10 V output, 20 Hz --
(TUNER, AUX, TAPE 20 kHz
-* SP. OUT) Phono (MC) : 0.02% at 10 V output, 30 Hz -
Damping Factor : 75 (1 kHz, 8 S2) 20 kHz
Rec. Output/Impedance : 150 mV/800 (2
Power Specifications : See page 19.
Dimensions & Weight
Dimensions Weight
Hight Width Depth Net Gross

U.S.A. & Canada

12.1cm (4-3/ ")

47.4 cm (185/ ")

34.5 cm (13-5/8")

8.3 kg (18.3 lbs)

9.5 kg (20.9 lbs)

All Other Areas

12.1 cm (4-3/4)

45.0 cm (17-3/4" )

34.5 cm (13-5/8")

8.3 kg (18.3 lbs)

9.5 kg (20.9 lbs)

A-X3
No. 2508

Design and specifications subject to change without notice.

-1-