Service Measurement - Philips AJ3970 Service Manual

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SERVICE MEASUREMENT

Tuner SW
RF Generator
e.g. PM5326
To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday«s cage.
Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).
Tuner AM (MW,LW)
RF Generator
e.g. PM5326
To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday«s cage.
CD
Use Audio Signal Disc SBC429
th
L.P.F. = 13 order filter 4822 395 30204
DUT
L
R
DUT
Aerial replacement
Capacitor
Bandpass
250Hz-15kHz
DUT
e.g. 7122 707 48001
Frame aerial
e.g. 7122 707 89001
4822 397 30184 (replaces test disc 3)
Low pass filter 22kHz
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
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Bandpass
LF Voltmeter
250Hz-15kHz
e.g. PM2534
e.g. 7122 707 48001
S/N and distortion meter
e.g. Sound Technology ST1700B
LF Voltmeter
e.g. PM2534
S/N and distortion meter
e.g. Sound Technology ST1700B
S/N and distortion meter
e.g. Sound Technology ST1700B
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