Canoga Perkins 2240 User Manual download pdf (Page 19)

2201 Rack Chassis/2200R Redundant Card Canoga Perkins

3. Troubleshooting

The following procedures are intended for use in the event of a system failure, not

during the initial installation of a Modem optical link. For initial installation checkout,

refer to Section 2 of this manual. Refer also to Section 4 for detailed diagnostics.

3.1 2201 Main Power Supply Fuse

To replace the main power supply fuse, remove the unit’s Main power cord from its

socket or terminal block at the base of the supply. The fuse cartridge is located

directly above the low voltage output cable. It is of the bayonet type, so a slight

inward pressure and a counter clockwise twist will release the fuse. Replace a blown

main power supply fuse with a same rate “Slo-Blo” type as indicated by the fuse

rating label on the blown fuse holder.

3.2 2201 Secondary Voltage Check

When making a voltage check of the supply’s secondary circuit, use the AC setting

for AC power supply or DC setting for DC power supply on your voltage meter. See

Figure 3-1 for secondary power connector and slot assignments. The measured volt-

age between the two contacts for a specific group of card slots, positions 3 and 4 for

example, should be 18VAC or 18VDC. The measured voltage between pin 1 (or pin 9 or

pin 10), the return circuit, and any other pin position should be 9VAC , +9VDC or -

9VDC. All the measured voltages can be within ±10%.

Figure 3-1.

2201 Secondary

Power Connector

and Slot Assignments

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 25 26 27

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Canoga Perkins 2240 User Manual Page 19