30
Description of boards
9.7) SUPERIMPOSITION AND AC CONTROL BOARD 15.14.253 (FOR G200 AC-DC ONLY) (fig. 28)
This board generates superimposing and controls AC switching of the secondary IGBT module.
WARNING:
perform checks following steps 1 and 2 in the given order!
WARNING:
measurements indicated in the following table should be taken with board 15.14.253 disconnec-
ted from the machine!
WARNING:
- insert board 15.14.253 in the machine and connect it to bus board 15.14.285/15.14.315
- disconnect connector CN1 from IGBT connection board 15.14.289
- switch the power source on and take measurements indicated in the table below:
- switch off the power source, reconnect connector CN1 to board 15.14.289 and repeat measurements
indicated in sect. 9.4.1
Component
Test point
Value
IG1
E G
10 kOHM
IG1
E C
+0.4 Vdc
IG2
E G
10 kOHM
IG2
E C
+0.4 Vdc
D1
A K
+0.4 Vdc
D5
A K
+0.4 Vdc
D20
A K
+0.4 Vdc
D21
A K
+0.4 Vdc
-
TP15 TP14
10 kOHM
-
TP17 TP16
10 kOHM
Power source / Mode
Test point
Value
ON / MMA
TP19 TP18
+15 Vdc
ON / MMA
TP13 TP18
+5 Vdc
ON / MMA
TP15 TP14
-13 Vdc
ON / MMA
TP17 TP16
+13 Vdc
Note
(valid only for board 15.14.253 version 6 and higher):
- solder-jumpers K1, K2 are closed (can be factory set only)
- solder-jumper K3 is open (can be factory set only)
Unless otherwise specified, all measurements sholud be taken with the boards in their slots and connected accordingly
1
2
