Meiko Computing Surface CS-2, Руководство пользователя

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10
S1002–10M128.02
3
There are 4 fuses located on the module backplane alongside the 4 SCSI card
connectors (see Figure 3-2 on page 16). These fuses protect the
±
12 V and the
±
5 V circuits on both the backplane and all boards that draw their power supply
from it (including the backplane cards and the LED panel). Access to these fuses
is gained from the rear of the module and requires the SCSI backplane cards to
be removed. All 4 fuses are the same type:
•
1.25
×
0.52”, 4 A anti-surge, HCR ceramic. Part number 22–FU100–03E400.
Warning – The backplane fuses may only be changed by trained engineers.
Operation
The power supply is operated by the main on/off switch located above the power
connector. 0 represents off, 1 represents on.
When first switched on five LEDs are visible through the rear of the power sup-
ply unit. Initially three of these should be green, two are red. After a short delay
all LEDs should be green.
Warning – A fault is pr esent if any light r emains red for more than 10 sec-
onds after first switching on, or changes fr om green to red during operation.
Switch the power supply off, disconnect fr om the main supply , and contact
Meiko for advice.
Removable Panels
Warning – Ensure the power supply is switched off and disconnected from
the main supply befor e removing the module’ s front or side panels.
The front and side panels may be removed from the module. Removing the front
panel gives access to the LED board, the processor boards, and the disk devices.
The side panels may be removed but there is no requirement to do so, except to
protect them during transit or when lifting the module into a bay .