Panasonic sa ax 720 service manual

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Page 1

ORDER NO. MD971215001
A2

Service Manual

AV Control Stereo Receiver DEI-

PRO

Receiver
SA-AX720
Colour
Area
P U.S.A.
() (K)
(PC) Canada

* Manufactured under license from Dolby Laboratories Licensing Corporation. Additinnally licensed under one or more of the
following patents: U.S. numbers 3,632,886,3,746,792 and 3,959,590; Canadian numbers 1,004,603 and 1,037,877.
"Dolby" and the double-D symbol are trade marks 01 Dolby Laboratories Licensing Corporation.

l Specifications
I FM Tuner Section
Frequency range 87.9 - 107.9 MHz
Sensitivity 11.2 dBf (2W. IHF '58)
50 dB quieting Sensitivity
MONO 18.3 dBf(4.5uV, IHF'58)
STEREO 38.3 dBf (45uV, IHF '58)
Total harmonic distortion
MONO 0.2%
STEREO 0.3%
SIN
MONO 73 dB
STEREO 67 dB
Frequency response 20 Hz - 15 kHz (+1 dB, -2dB)
Alternate channel selectivity 65 dB
Capture ratio 1.5 dB
Image rejection at 98MHz 40 dB
Spurious response rejection at 98MHz 75 dB
AM suppression 50 dB
Stereo separation
1 kHz 40 (13
mm: 30 dB
Antenna terminal(s) 759 (unbalanced)

I AM Tuner Section

Frequency range 530 - 1710 kHz
Sensitivty 20uV, 330uV/m
Selectivity 55 dB
IF reﬂection at 1000kHz 50 dB
I Video Section

Output voltage at 1 V input (unbalanced) 1:0.1 Vp-p
Maximum input voltage 1.5 Vp-p
lnputloutputimpedance 75 Q

Technics®

I Amplifier Section

Rated mlnlmum sine wave HMS power output
20 Hz-20 kHz both channels driven
0.05% total hamonlc distortion

1 kHz continuous power output
both channels driven 0.05% total
hamonic distortion

Total harmonic distortion
Rated power at 20 Hz - 20 kHz 0.05% (89)
Half power at 1 kHz 0.03% (89)

Power output at the Dolby Pro Logic operation
0.9% at 1 kHz,

100 W per channel (852)

105 W per channel (89)

From 2 x 100 w (69)
Center 100 W (69)
Surround 2 x100 w (39)

Low frequency damping factor 30 (85))

Load impedance

Front
A or B 8 (I
A and B 8 9
Center 8 Q
Surround 8 Q
Dynamic headroom 2 dB (80)
Frequency response
PHONO RIAA standard curve 1 0.8 dB
CD, TAPE, DVD, VCR, TV/DSS 10 Hz- 70 kHz, i 3 dB
Input sensitivity
PHONO 0.4 mV (3mV, IHF '66)
CD, TAPE, DVD, VCR, TVIDSS 27 mV (200mV, IHF '66)

SIN (IHF A)

PHONO 70 dB (BOdB, IHF '66)

CD, TAPE, DVD, VCR, TVHJSS
Inputlmpedance

75 dB (85dB. IHF 66)

PHONO 47 k0

CD, TAPE, DVD, VCR, TV/DSS 22 k9
Tone controls

BASS 50 H2,+10to -10dB

TREBLE 20 kHz, +10 to -10 dB

Sub-Wooferfrequency response 7 -100 Hz, is dB