Agilent Technologies 4395A, Руководство по обслуживанию

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If the v oltmeter reading is within the limits, the A50 +5 VD p o w er supply is v eried.
T urn the analyzer p o w er o and reconnect the cable to the A50J3. Then con tinue with
the next Disc onne ct Cables on the A1 CPU section.
3. Disconnect Cables on the A1 CPU
a. T urn the analyzer p o w er o.
b. Disconnect cables from the A1 CPU's connectors, J10, J11, J12, J13, J14, J15, and J17.
The connector lo cations are sho wn in Figure 7-7
Figure 7-7. A1 CPU Connector Locations
c. T urn the analyzer p o w er on. Lo ok at the A1 +5 VD LED.
If the LED is still o, the A1 CPU is probably faulty . Replace the A1 CPU.
If the LED go es on, the A1 CPU is v eried. Con tinue with the next step.
d. T urn the analyzer p o w er o. Reconnect the cable to the A1J10. T urn the analyzer p o w er
on. Lo ok at the A1 +5 VD LED.
If the +5 VD LED go es out, the problem may b e in the analog assem blies. Con tinue
with the next R emove Assemblies .
If the + 5 VD LED is still on, con tinue with the next step.
e. Reconnect one of the disconnected cables to its connector at a time. T urn the analyzer
p o w er on after eac h cable is connected. The assem bly related with the cable turning the
+5 VD LED o is probably faulty . Replace the assem bly .
7-10 P o w er Supply Troubleshooting