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Jotron AS| TR7750C: Operators Manual  ERROR CONDITIONS AND CORRECTIVE ACTIONS

Page 6-3

P/N: 84748 (pre_F)

6V

Failure on 6V

regualtor on mod

module

LO lock detect

Synthesizer is out

of lock

LO level

The LO level is

below 0dBm

Mod module

TX alarm

Action:

Replace -

TX unit (LRU)

Modulator module

(LRM)

Probable cause:

Defective

synthesizer circuits

/ VCO / TCXO

Action:

Replace -

TX unit (LRU)

Modulator module

(LRM)

Probable cause:

Defective

synthesizer circuits

/ VCO / TCXO

Action:

Replace -

TX unit (LRU)

Modulator module

(LRM)

Probable cause:

Defective 6V

regulator

modulator board

Figure 6.1-2, Transmitter Modulator module, errors and corrective actions