Technics-SAAX540-avr-sch 维修电路原理图.pdf

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1、http:/schema99.host.sk/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 87.9-107.9 MHz Sensitivity 11.2 dBf (2V, IHF58) 50 dB quieting sensitivity MONO 18.3 dBf (4.5V, IHF58) STEREO 38.

2、3 dBf (45V, IHF58) Total harmonic distortion MONO 0.2% STEREO 0.3% S/N MONO 73 dB STEREO 67 dB Frequency response 20 Hz-15 kHz,+1 dB, -2 dB Alternate channel selectivity 65 dB Capture ratio 1.5 dB Image rejection at 98 MHz 40 dB Spurious response rejection at 98 MHz 75 dB AM suppression 50 dB Stereo

3、 separation 1 kHz 40 dB 10 kHz 30 dB Antenna terminal 75 (unbalanced) AM Tuner Section Frequency range 530-1710 kHz Sensitivity 20V, 330V/m Selectivity 55 dB IF rejection (at 1000 kHz) 50 dB Video Section Output voltage at 1 V input (unbalanced) 10.1 Vp-p RadioFans.CN 收音机爱 好者资料库http:/schema99.host.s

4、k/ 2000 Matsushita Electronics (S) Pte. Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. TOP NEXT Maximum input voltage 1.5 Vp-p Input/output impedance 75 (unbalanced) Amplifier Section Rated minimum sine wave RMS power output 40 Hz-20 kHz both channels driven 0

5、.8% total harmonic distortion 100 W per channel (8) 1 kHz continuous power output both channels driven 0.05% total harmonic distortion 105 W per channel (8) Total harmonic distortion rated power at 40 Hz-20 kHz 0.8% (8) half power at 1 kHz 0.07% (8) Power output at the Dolby Pro Logic operation 0.9%

6、 at 1 kHz Front 2 x 100 W (8) Center 100 W (8) Surround 2 x 100 W (8) Low frequency damping factor 30 (8) Load impedance Front A or B 4 - 8 A and B 8 Center 8 Surround 8 Frequency response PHONO RIAA standard curve (30 Hz - 15 kHz)0.8 dB CD, TAPE, DVD, VCR, TV 10 Hz-70 kHz,3 dB Input sensitivity PHO

7、NO 0.4 mV (3 mV, IHF66) CD, TAPE, DVD, VCR, TV 27 mV (200 mV, IHF66) S/N (IHF A) PHONO 70 dB (80 dB, IHF66) CD, TAPE, DVD, VCR, TV 75 dB (85 dB, IHF66) Input impedance PHONO 47 k CD, TAPE, DVD, VCR, TV 22 k Tone controls BASS 50 Hz,+10 to -10 dB TREBLE 20 kHz,+10 to -10 dB Subwoofer frequency respon

8、se 7 - 100 Hz,3 dB General Power supply AC 120 V, 60 Hz Power consumption 450 VA, 350 W Dimensions (W x H x D) 430 x 136 x 320.6 mm (16-15/16” x 5-11/32” x 12-5/8”) Weight 8.8 kg (19.54 lb.) Power consumption in standby mode: 1 W Notes: 1.Specifications are subject to change without notice./Weights

9、and dimensions are approximate. 2.Total harmonic distortion is measured by the digital spectrum analyzer. * Manufactured under license from Dolby Laboratories.“Dolby”,“Pro Logic” and the double-D simbol are trademarks of Dolby Laboratories. RadioFans.CN 收音机爱 好者资料库http:/schema99.host.sk/10 Schematic

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

11、gly, there may arise some error in voltage values and waveformsdepending upon the internal impedance of the tester or the measuring unit. Importance safety notice: Components identifed by mark have special characteristics important for safety. Furthermore, S946 Power Switch S948 Tape Switch S950 FM

12、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 .FM ( ) .AM 19. 4. 2004file:/C:Documents%20and%20SettingsAdminPlochaSA-AX540s1000000000

13、 x.htmhttp:/schema99.host.sk/special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. Whenreplacing any of components, be sure to use only manufacturers specified parts shown in the parts list. Caution! IC, LSI and VLSI a

14、re 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. 19. 4. 2004file:/C:Documents%20and%20SettingsAdminPlochaSA-AX540s1000000000 x.htm