Jvc A X1 Service Manual

Page 1

MODEL

A-XI

STEREO INTEGRATED AMPLIFIER
Super-A

No. 2506
MAR. 1980

Page 2

Contents

1. Specifications ........................ 1
2. Proper Connections of Power LED Indicators . . . 1
3. Main Parts Locations
3-(1) Top View ....................... 2
3-(2) Front View ...................... 2
3-(3) Rear View ....................... 2
4. Exploded View ....................... 3
5. Block Diagram ........................ 4
6. New Technology of lC in Super A Circuit ...... 4
7. Power Amplifier Idling Current Adjustment
Procedure ........................... 5
8. Printed Circuit Board Assy and Parts List
8-(1) TXX-24O Power Amp., Volume Control 8:
Other Function Split P.C. Board
Assy .................. 5

1 . Specifications

Output Power
(Both Channels driven)

Total Harmonic Distortion:

lntermodulation
Distortion
Power Band Width

Frequency Response

Dumping Factor

:10 Hz - 100 kHz
:50 (1 kHz,8 S2)

: 30 watts per channel, min.

RMS into 8 $2 from 20 Hz to
20 kHz with no more than
0.007 % T.H.D.

31 watts per channel into 8 .Q
at 1 kHz.

0.007 % at Rated output, from
20 Hz to 20 kHz, 8 9.

0.003 % at Rated output at

1 kHz, 8 S2

: 0.007 % at Rated output, 8 $2

: 10 Hz - 30 kHz (lHF, both

channels driven, 8 52, 0,02 %
THD)

+0.5 dB
-3 dB

8-(2) TXX-241C Tone Controls & Other Select
Switches Split P.C. Board Ass'y .

8-(3) TPS-2558
8-(4) TPS-277
8-(5) TPS-234A

AC Fuse P.C. Board Ass'y
AC Fuse P.C. Board Ass'y . . .
AC Voltage Selector P.C. Board

Ass'y ..................

10.
11.
12.

Accessories List . . . .

Areas ...........

A-X1 Schematic Diagram .................
Packing Materials and Part Numbers .......... 12
Parts List with Specified Numbers for Designated

-------------------

Warning:

When placing the parts marked with A , be sure to use
the designated parts to ensure safety.

Tone Controls
BASS
TR EB LE
Input Sensitivity/
Impedance
Phono
TUNER, AUX, TAPE
Rec. Output Level
Phono Equalizer Deviation:
Phono Overload
Signal to Noise Ratio
Phono
TUNER, AUX, TAPE
Loudness Control
(Volume Control at
~30 dB position)
Dimensions

Weight

: 100 Hz :8 dB
: 10 kHz :8 dB

: 2.5 mV/47 k9
: 150 mV/40 k9
: 150 mV

:05 dB (20 Hz - 15 kHz}

: 150 mV (1 kHz)

:73 dB (new IHF)
:77 dB (neleF)
: +6 dB at 100 Hz

+4 dB at 10 kHz

:4-11/16"(H) x 16-1/2"(W) x

12-5/16"(W)
(12 cm x 42 cm x 32.9 cm)

: 12.| lbs (5.5 kg)

2. Proper Connections of Power LED Indicators

(iii

.JJJJLLLUi.

Connecting the both plugs . . .
(The numbers and color code-
ward of wires are indicated on a
surface of socket, see Fig. 1A.)

Fig. 1B
A-X1
No. 2506

I}. .mmfllnmm

Proper Connection

Fig. 10

Wrong Connection
(damage to LED Indicator)

Fig. 1 D