Control Voltages; Signals & Line Voltage Display - Siemens MULTIMOBIL 10 Troubleshooting Manual

1.5

Control Voltages

Voltage
+5 V
+15 V
-15 V
Collimator Supply
1.6 Signals & Line voltage display:
Signal
kVsoll
mAsoll
IH
REG: Max
Main Inv. req.
CAL :Max
Fil.Inv. Freq
The actual mains Line voltage, at 110 and 230 V supply, is being monitored for
display on the 7 segment display during first step of hand release switch for
radiography. Ensure that display value mathes with actual line voltage with allowed
tolerance ± 5 %. Using P1 potetiometer on D801 PCB, set the voltage accordingly.
This is applicalbe while replacing D915 and D801 PCB also.
If the Line voltage is less than 205 volts on on 230 V line, microcontroller switches
"ON" the 'LN' contactor which will support extra voltage through auto transformer
for rotating anode to run at higher speed. In preperation and exposure mode
contactor retains its position. After 5 second of each termination of radiography Line
voltage is being monitored once again.
When unit is connected to 110 V line LN contactor does not function even though
there is a variation in the supply voltage.
Siemens Ltd. Med Division India
Measuring Point
D915. X15.4
D915. X15.5
D915. X15.7
D801 . X6
Measuring Point
D915.TP.KVS
during Exposure
D915.TP.JRS
during Exposure
D915.TP. IH during
Standby
D915.TP. IH during
Preparation
D915.TP.REG point
during exposure
D915 TP CAL during
start up
Range
4.8v to 5.2v
13.5v to 16.5v
-13.5v to -16.5v
12V ac to 16V ac
Range
2.0 ± 0.1 V for 60kV
3.2 V ± 0.1 V for 160mA
1.5V± 0.1V
2V ±0.3V (for critically
damped mA)
15 kHz ± 0.5 kHz
15KHz ± 0.5 kHz
Version 4.0
Service Manual
Service Instructions
Adjustment
D915.P7
D915.P6
D915.P5
D915.P4
D915 .P3
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