Checking The Supply Voltages - Siemens POLYMOBIL III Service Instructions Manual

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Checking the supply voltages

•
When the system is switched on, relays HR and K1 on D920 pull in and supply
transformer T1, power supply M6 and the intermediate circuit with line voltage.
•
Measure the 24 V supply voltage with the digital multimeter on D920 at MP "+ 24 V" and
"0V"..
Measured voltage approx. 28.2 V
•
Measure the filament circuit voltage supply on the electrolyte capacitor
C46 at +/ - on D920.
Measured voltage
in stand-by mode approx. 18.5 V
with preparation approx. 16.4 V
POLYMOBIL III
Notes on trouble-shooting
RXB8-115.061.02
Rev. 01 10.95
D920 (X038I-92D)
±
Tolerance 5 V
±
Tolerance 4 V
Tolerance ± 3 V
Page 6 of 24
CS PS 24
4
Siemens AG
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