15VFM Supply Problems

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Table 5-6.Error Messages 105 and 106 (6 of 10)

This supply provides 15 volts to the FM circuits.

Step 7. Perform the following procedure to isolate malfunctions to the 15VFM supply and its outlying load circuit.

a.Place the LINE switch to STANDBY.

b.Replace the A15 PCB assembly.

c.Place the LINE switch to OPERATE and measure the

15VFM voltages per Table 5-7.

qIf the voltages are correct, the problem is cleared.

If the voltages are incorrect, go to step d.

d.Place the LINE switch to STANDBY.

e.Remove the A11 and A13 PCBs.

f.Place the LINE switch to OPERATE and measure the 15VFM voltages.

qIf the voltages are correct, go to step g.

If the voltages are still incorrect, contact your local

ANRITSU service center for assistance.

g.Place the LINE switch to STANDBY, then install on the remove PCBs.

h.Place the LINE switch to OPERATE and measure the 15VFM voltages.

i.Continue steps g and h until the faulty PCB is located.

5-24	682XXB/683XXB MM

682XXB, 683XXB specifications

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Anritsu 682XXB, 683XXB manual 15VFM Supply Problems

Models: 682XXB 683XXB

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