2 - 2
SERVICE MEASUREMENT
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
DUT
RF Generator
e.g. PM5326
S/N and distortion meter
e.g. Sound Technology ST1700B
Tuner FW
Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).
Ri=50
½
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
DUT
S/N and distortion meter
e.g. Sound Technology ST1700B
Frame aerial
e.g. 7122 707 89001
Tuner AM (MW,LW)
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 250kHz) to eliminate hum (50Hz, 100Hz).
RF Generator
e.g. PM5326
Ri=50
½
L
R
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
DUT
CD
RECORDER
Use Audio Signal Disc SBC429 4822 397 30184
(replaces test disc 3)
Use Universal Test Cassette Fe SBC420 4822 397 30071
L
R
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
DUT
LF Generator
e.g. PM5110
Ri=50
½
Summary of Contents for FWM139
Page 2: ...1 1 HANDLING CHIP COMPONENTS ...
Page 3: ...1 2 ...
Page 10: ...5 1 5 1 SET BLOCK DIAGRAM ...
Page 11: ...5 2 5 2 SET WIRING DIAGRAM ...
Page 12: ...6 1 6 1 CIRCUIT DIAGRAM CPU DISPLAY BOARD ...
Page 13: ...6 2 6 2 CIRCUIT DIAGRAM AMP POWER BOARD ...
Page 14: ...6 3 6 3 LAYOUT DIAGRAM CPU DISPLAY AMP POWER BOARD TOP VIEW ...
Page 15: ...6 4 6 4 LAYOUT DIAGRAM LAYOUT DIAGRAM CPU DISPLAY AMP POWER BOARD BOTTOM VIEW ...
Page 16: ...7 1 7 1 CIRCUIT DIAGRAM CASSETTE PART ...
Page 17: ...7 2 7 2 CIRCUIT DIAGRAM CD MP3 PART ...
Page 18: ...7 3 7 3 CIRCUIT DIAGRAM TUNER AUDIO PART ...
Page 19: ...8 1 LAYOUT DIAGRAM MAIN BOARD TOP VIEW 8 1 ...
Page 20: ...8 2 LAYOUT DIAGRAM MAIN BOARD TOP VIEW 8 2 ...
Page 21: ...9 1 9 1 EXPLODED VIEW DIAGRAM ...
