518 Chapter10
Synthesizer Section
Troubleshooting Using the TAM
Main loop error volt DVR MS4
Option drive MS8
Option drive switch MS7
Option drive DAC MS6
A14J18 ±10 V reference MS1, MS2
LODA drive MS5, MS6, MS7,
MS8
Main coil tune DAC MS3
Sweep gen DAC MS4*
Sweep gen DAC MS4*
A14J19 Second conv PIN switch MS8
Second conv mixer bias MS1
Second conv drain bias MS3
Second conv doubler bias MS4
Second conv driver bias MS5
First mixer drive switch MS7
First mixer drive DAC MS6
A14J302 Revision MS7
Fractional N out MS1
Divided reference MS4
Feedback buffer bias MS5
Outamp bias MS6
A15J200 Positive 15 volt supply MS1
Sampler drive buffer bias MS2
Sampling oscillator bias MS3
Offset lock drive buffer MS4
* Only on A14 assemblies with part numbers 08560-60059,
08560-69059, 08560-60062, 08560-69062.
Table 10-5 TAM Tests versus Test Connectors
Connector
Manual Probe
Troubleshooting Test
Measured Signal
Lines
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