Checking The Fuses; Checking The Leds On D920 - Siemens MULTIMOBIL 2.5 Troubleshooting Manual

NOTICE
Switch the Unit OFF.

7.6.2 Checking the fuses

Open the front cover of the control unit .
Loosen the Fuse carriers which are mounted on the base of the control unit and check
the continuity of fuse link . If fuse link has responded for overcurrent replace the Fuse
Link.
Checking the fuses on D920
F1 0.25 AT
F2 0.630 AT
F3 0.630 AT
F4 10 AF
F5 4 AT

7.6.3 Checking the LEDs on D920

Switch the Unit ON.
After the initialisation, the default data 60 kV and 10 mAs are displayed at first time
switch ON or last stored kV & mAs value.
7.6.3.1 Standby mode
On D920 the following LEDs are illuminated :
V3 Main line voltage 240 V.
V9 Presence of 240V.
V12 Presence of 24 V for relay
V15 Presence of 12 V for collimator
V25 Presence of 24V for filament circuit
7.6.3.2 Preparation ON
On half press of exposure release switch unit should go in preperation mode.
In addition, V22 (green) lights up on D915.
7.6.3.3 Exposure Mode
On the second step of exposure release switch ,unit enters in radiograpy mode.
In addition, V23 (green) for exposure lights up on D915.
7.6.3.4 CODE message
Siemens Ltd. Med India
If the Unit can not be switched ON Check Supply at
Socket.Check Continuity of mains cable with the Plug
pins.Check Over Current Protective devices MCB and U1 & U2.
T1 transformer primary
240 V for X-ray table.
24 V for K3,K4,K5 relays
Collimator supply
Filament circuit.
Version 6.0
Copyright © SIEMENS LTD. All rights reserved. For internal use only
Service Manual
Service Instructions
7-6