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Service Manual
TOP NEXT Order No. MD0004067C1 A2

AV Control Stereo Receiver

SA-AX540 Color (K) ... Black Type P ... U.S.A. PC ... Canada

FM Tuner Section Frequency range Sensitivity 50 dB quieting sensitivity MONO STEREO Total harmonic distortion MONO STEREO S/N MONO STEREO Frequency response Alternate channel selectivity Capture ratio Image rejection at 98 MHz Spurious response rejection at 98 MHz AM suppression Stereo separation 1 kHz 10 kHz Antenna terminal 40 dB 30 dB 75 (unbalanced) 73 dB 67 dB 20 Hz-15 kHz,+1 dB, -2 dB 65 dB 1.5 dB 40 dB 75 dB 50 dB 0.2% 0.3% 18.3 dBf (4.5V, IHF'58) 38.3 dBf (45V, IHF'58) 87.9-107.9 MHz 11.2 dBf (2V, IHF'58)

AM Tuner Section Frequency range Sensitivity Selectivity IF rejection (at 1000 kHz) 530-1710 kHz 20V, 330V/m 55 dB 50 dB

Video Section Output voltage at 1 V input (unbalanced) 1±0.1 Vp-p

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Maximum input voltage Input/output impedance

1.5 Vp-p 75 (unbalanced)

Amplifier Section Rated minimum sine wave RMS power output 40 Hz-20 kHz both channels driven 0.8% total harmonic distortion 1 kHz continuous power output both channels driven 0.05% total harmonic distortion Total harmonic distortion rated power at 40 Hz-20 kHz half power at 1 kHz Power output at the Dolby Pro Logic operation 0.9% at 1 kHz Front Center Surround Low frequency damping factor Load impedance Front A or B A and B Center Surround Frequency response PHONO CD, TAPE, DVD, VCR, TV Input sensitivity PHONO CD, TAPE, DVD, VCR, TV S/N (IHF A) PHONO CD, TAPE, DVD, VCR, TV Input impedance PHONO CD, TAPE, DVD, VCR, TV Tone controls BASS TREBLE Subwoofer frequency response 50 Hz,+10 to -10 dB 20 kHz,+10 to -10 dB 7 - 100 Hz,±3 dB 47 k 22 k 70 dB (80 dB, IHF'66) 75 dB (85 dB, IHF'66) 0.4 mV (3 mV, IHF'66) 27 mV (200 mV, IHF'66) RIAA standard curve (30 Hz - 15 kHz)±0.8 dB 10 Hz-70 kHz,±3 dB 4 - 8 8 8 8 2 x 100 W (8) 100 W (8) 2 x 100 W (8) 30 (8) 0.8% (8) 0.07% (8) 105 W per channel (8) 100 W per channel (8)

General Power supply Power consumption Dimensions (W x H x D) AC 120 V, 60 Hz 450 VA, 350 W 430 x 136 x 320.6 mm (16-15/16" x 5-11/32" x 12-5/8") Weight Power consumption in standby mode: Notes: 1. 2. Specifications are subject to change without notice./Weights and dimensions are approximate. Total harmonic distortion is measured by the digital spectrum analyzer. 8.8 kg (19.54 lb.) 1W

* Manufactured under license from Dolby Laboratories."Dolby","Pro Logic" and the double-D simbol are trademarks of Dolby Laboratories.

© 2000 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

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10 Schematic Diagram
TOP PREVIOUS NEXT (All schematic diagrams may be modified at any time with the development of new technology.) Notes:
S946 Power Switch

S948 Tape Switch

S950 FM Mode Switch

S951 Band Switch

S952 Tuning Down Switch

S953 Tuning Up Switch

S955 Memory Switch

S956 Tape Mode Switch

S958 CD Mode Switch

S976 6CH Switch

S980 Help Switch

S985 Speaker B Switch

S986 Speaker A Switch

The voltage value and waveforms are the reference voltage of this unit measured by DC electronic voltmeter (high impedance) and oscilloscope on the basis of chassis. Accordingly, there may arise some error in voltage values and waveformsdepending upon the internal impedance of the tester or the measuring unit.
< > ...FM

()

...AM

Importance safety notice: Components identifed by mark have special characteristics important for safety. Furthermore,

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special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), lownoise (resistors), etc. are used. Whenreplacing any of components, be sure to use only manufacturer's specified parts shown in the parts list.

Caution!
IC, LSI and VLSI are sensitive to static electricity. Secondary trouble can be prevented by taking care during repair. Cover the parts boxes made of plastics with aluminium foil. Put a conductive mat on the work table. Ground the soldering iron. Do not touch the pins of IC, LSI or VLSI with fingers directly.

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