Technics SAEX-140 Service manual

Service Manual

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Order No. MD0004066C2

AV Control Stereo Receiver

SA-EX140

Color

(K) ... Black Type

E ... Europe

EB ... Great Britain

EG ... Germany and Italy

FM Tuner Section

Frequency Range 87.50-108.00 MHz

Sensitivity

S/N 30 dB

S/N 26 dB

S/N 20 dB

IHF usable sensitivity

IHF 46 dB stereo quieting sensitivity

Total harmonic distortion

MONO 0.2%

STEREO 0.3%

1.5μV/75Ω

1.3μV/75Ω

1.2μV/75Ω

1.5μV/75Ω (IHF’58)

22μV/75 Ω

S/N

MONO

STEREO

Frequency response 20 Hz-15 kHz

Alternate channel selectivity±400 kHz 65 dB

Capture ratio 1.5 dB

Image rejection at 98 MHz 40 dB

IF rejection at 98 MHz 70 dB

Spurious response rejection at 98 MHz

AM suppression

Stereo separation

1 kHz 40 dB

Carrier leak

19 kHz -30 dB (-35 dB, IHF)

38 kHz -50 dB (-55 dB, IHF)

Channel balance (250 Hz-6.3 kHz)

Limiting point

60 dB (73 dB, IHF)

58 dB (67 dB, IHF)

+1 dB, -2 dB

70 dB

50 dB

±1.5 dB

1.2μV

Bandwidth

IF amplifier 180 kHz

FM demodulator 1000 kHz

Antenna terminal 75Ω (unbalanced)

AM Tuner Section

Frequency Range

522-1611 kHz

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Sensitivity 20μV, 330μV/m

Selectivity (at 999 kHz)

IF rejection (at 999 kHz)

55 dB

50 dB

Amplifier Section

Power output

DIN 1 kHz (T.H.D. 1%) 2 x 100 W (4Ω)

40 Hz-20 kHz continuous power outputboth channels driven

2 x 80 W (8Ω)

Total harmonic distortion

rated power at 40 Hz-20 kHz 0.5% (8Ω)

half power at 1 kHz 0.07% (8Ω)

Power bandwidth

both channels driven. -3 dB 10 Hz-40 kHz (8Ω)

Damping factor

Load impedance

Front

Frequency response

30 (8Ω)

4-16Ω

PHONO RIAA standard curve (30 Hz-15 kHz)±0.8 dB

CD, TAPE, VCR

Input sensitivity and impedance

PHONO

CD, TAPE, VCR 200 mV/22 kΩ

S/N at rated power (8Ω)

PHONO 70 dB (IHF, A: 80 dB)

CD, TAPE, VCR 75 dB (IHF, A: 85 dB)

Tone controls

BASS

TREBLE

Output voltage

TAPE REC (OUT), VCR OUT 200 mV

Channel balance (250 Hz-6.3 kHz) ±1 dB

Channel separation 55 dB

Headphones output level and impedance

10 Hz-40 kHz,±3 dB

3 mV/47 kΩ

50 Hz,+10 to -10 dB

20 kHz,+10 to -10 dB

430 mV/330Ω

General

Power supply AC 230-240 V, 50 Hz (For EB only)

AC 230 V, 50 Hz (For E/EG only)

Power consumption 190 W

(in standby condition: 3 W)

Dimensions (W x H x D)

Weight

430 x 136 x 312 mm

7.0 kg

Notes:

1.Specifications are subject to change without notice./Weight and dimensions are approximate.

2.Total harmonic distortion is measured by the digital spectrum analyzer.

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

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7 Troubleshooting

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This unit has test points on each circuit board block for use in troubleshooting.

7.1 Connection

7.2 Required items

7.3 Test Procedure for Amplifier Circuit

7.4 Test Points Positions of Amplifier Circuit

7.5 Normal Waveforms of Amplifier Circuit and Likely Faulty Blocks

7.6 Circuit Blocks

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7.1 Connection

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Connect either a CD player, tape deck or AF oscillator to the input terminals of the unit.

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