Head
99
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GA10218_0101 - 5/2002
4. Exchange fuses
As can be seen in Fig 37, fuses 1, 2, 3 and 4 are located on the MSV
board, fuses 5 and 6 on the I/O board and the fuses 7, 8, 9 and 10 are
located on the wiring backplane under the MSV board.
5. Finally re-install the covers for the electronics and mechanical section in
the reverse order.
Nr. 1 F1 on MSV
Fuse rating: T 2A
24 V system voltage of the mass spectrometer supply.
Loosen control panel (two Phillips screws). Loosen the panel which
holds the MSV board in place (two Phillips screws).
Pull the MSV board (the board at the back) up to the top. For this insert
a screwdriver into the two recesses at the sides (top) one after the other
and lever the MSV board out by resting the screwdriver on the STE
board.
Nr. 2 F2 on MSV
Not in use.
Nr. 3 F3 on MSV
Fuse rating: T 1A
For generating 24 V for DCDC-converter (+/- 15V / 5 V)
Nr. 4 F4 on MSV
Fuse rating: M 0,032A
Fuse for the anode voltage
Nr. 5 F1 on I/O board
Fuse rating: T 0,8A
Protects the 24 V supply carried by the option socket
Nr. 6 F2 on I/O board
Fuse rating: T 0,2A
Protects the selectable 24 V for RS 232 Interface.
Nr. 7 F 1 on MB
Fuse rating: T 0,8A
Supply voltage for the remote control
Nr. 8 F 2 on MB
Fuse rating: T 4A
Supply voltage 24 V for I/O board.
Nr. 9 F 3 on MB
Fuse rating: T 0,8A
Supply voltage 24 V for fans and motorrelay.
Nr.
10
F 4 on MD
Fuse rating: T 8A
Protection for the forevacuum pump.
