Siemens MOBILETT Plus HP Service Instructions Manual page 37

Troubleshooting instructions
•
A Look for a small red light to the right of the kV display. The light indicates that the
program is in the startup phase.
•
If there is neither a small red light nor text on the display, it indicates that the
voltage supply is missing. Check the power supply D8 (see wiring diagram, page
20).
•
Test the voltage supply to the CPU board and the display board (see wiring
diagram X037E, pages 110 and 120).
•
Check that all connectors on D8, D1 and D3 are connected.
•
Check that the Reset LED on D1 is not lit (see circuit diagram on page 110, V33).
If it lights continuously, there is an error on board D1.
•
Check the voltage supply on D1 and D3. Refer to wiring diagram, page 110 and
120.
•
B Check button functions. Refer to the wiring diagram, page 120 and 180.
•
C Press the collimator lamp button and listen for a "click" from LR1 (see wiring
diagram, page 180).
•
If no "click" is heard, check the voltage supply on D4.
•
Check the measuring point "LAMPON". If there is no signal, check k5, k9, k3 and
k2.
•
If a "click " is heard, check the voltage supply in the lamp bracket (see wiring
diagram, page 180).
•
D Press the turn plate button and check if a "click" is heard from MR1 and MR2 (see
wiring diagram, page 170). If a "click" is heard, check the voltage in K68:1-2 and
compare it with the references given in the wiring diagram. Also check the
resistance in the turn plate magnet (see wiring diagram, page 170).
If no "click" is heard, check the voltage supply on D4 and measuring points
"PIVOTON" and "PIVOTHOLD". If there are no signals, check k1, k5 and the
buttons.
•
E After exposures with high mAs values, there is a delay for the ready light indicator
until it lights again. The delay is to distribute the temperature in the anode target
sufficiently and to allow time for the capacitor bank to charge.
During startup, it can take up to 90 s before the ready light indicator lights up. A
message will be displayed if the ready light indicator does not light.
Siemens AG
Medical Solutions
SPR8-220.061.03 Page 1 of 2
Rev. 03 09.03 CS PS 24
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MOBILETT Plus HP