Jvc A X2 Service Manual

Page 1

MODEL

A'XE

STEREO INTEGRATED AMPLIFIER
s u pl- r- A

No. 2507
MAR. 1980

Page 2

Contents

1. Specifimtions ........................ 1 8-(3) TPS~2558 AC Fuse P.C. Board Ass'y 9
2. Proper Connections of Power LED Indicators . . . 1 8-(4) TPS-277 AC Fuse P.C. Board Assy . . . 9
3. Main Parts Locations 8-(5) TPS-234A AC Voltage Selector P.C. Board
3-(1) Top View ....................... 2 Ass'y .................. 9
3-I2) Front View ...................... 2 8-(6) TXX-ZZQB SEA (Sound Effect Amplifier)
3-(3) Rear View ....................... 2 P.C. Board Ass'y ........... 10
4. Exploded View .......... . ............ 3 9. A-X2 Schematic Diagram ................. 12
5. Block Diagram ........................ 4 10. Accessories List ....................... 14
6. New Technology of IC in Super A Circuit ...... 4 11. Packing Materials and Part Numbers .......... 14
7. Power Amplifier Idling Current Adjustment 12. Parts List with Specified Numbers for Designated
Procedure ........................... 5 Areas .............................. 14
8. Printed Circuit Board Ass'y and Pam List
8-(1) TXX-241A Power Amp., Volume Control &
Other Functions Split P.C. Board .
Ass'y .................. 5 W3'"" . .
8-(2) TXX-240 Tone Controls& Other Select When placmg the parts marked With [5 , be sure to use
Switches Split P.C. Board Ass'y _ 8 the desrgnated parts to ensure safety.

1 . Specifications

Output Power : 40 watts per channel, min. Center Frequency : 40, 250, 1 k, 5 k, 15 kHz

(Both Channels driven) RMS into 8 $2 from 20 Hz to Control Range : :12 dB
20 kHz with no more than Input Sensitivity/
0.007 % T.H.D. Impedance
42 watts per channel into 8 $2 Phono 2 2.5 mV/47 k9
at 1 kHz. TUNER, AUX, TAPE : 150 mV/40 k9
Total Harmonic Distortion: 0.007 % at Rated output, from REC. OUtDUt LBVGI I 150 mV
20 Hz to 20 kHz, 8 Q Phono Equalizer Deviation: $0.5 dB (20 Hz - 15 kHz)

Intermodulation
Distortion
Power Band Width

Frequency Response

Dumping Factor
Tone Controls (S.E.A)

:10 Hz - 100 kHz
:50 (1 kHz,8 9)

0.003 96 at Rated output at
1 kHz, 8 $2

: 0.007 % at Rated output, 8 Q

: 10 Hz -30 kHz (IHF, both

channels driven, 8 52, 0.02 %
THD)

+0
-3 dB

Phono Overload
Signal to Noise Ratio
Phono
TUNER, AUX, TAPE
Loudness Control
(Volume Control at
-30 dB position)
Dimensions

Weight (Net)
Power Specifications :

: 150 mV [1 kHz)

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

+4 dB at 10 kHz

: 4-11/16"(H) x16-1/2"(W) x

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

: 14.6 lbs (6.6 kg)

See page 14

2. Proper Connections of Power LED Indicators

®®©@ 5

o®0@w
Illlllllll

a; $4.) .5

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-X2
No. 2507

,".

mm

Proper Connection
Fig. 1C

J

Wrong Connection

(damage to LED Indicator)

Fig. 1D