nTo display the nominal YTO’s frequency, press (CAL), MORE, FREQ DIAGNOSE, LO FREQ .

Table 10-3. YTO Frequency in TEST Position

Roller Oscillator Frequency YTO Pretune Accuracy Nominal YTO Frequency

-104to -93 MHz

+30/-10 MHz

LO Frequency +lO MHz

-93 to -73 MHz

f20 MHz

LO Frequency

-73to -65 MHz

+lO/-30 MHz

LO frequency -10 MHz

65

to 73 MHz

+30/-10 MHz

LO Frequency +lO MHz

73

to 93 MHz

f20 MHz

LO Frequency

93 to 104 MHz

+lO/-30 MHz

LO Frequency -10 MHz

Troubleshooting Using the TAM

When using Automatic Fault Isolation, the TAM indicates suspected circuits that need to be manually checked. Use Table 10-4 to locate the manual procedure.

Table 10-5 lists assembly test connectors associated with each Manual Probe Troubleshooting test. Figure 10-3 illustrates the location of Al4 and Al5 test connectors.

Al4Al5

FREQUENCYRF

CONTROL

 

 

J901

3501

J304

(REVISION

J5O2 C O N N E C T O R )

 

 

37

J 2 3

J 1 7

JZOO

J302 J 16 Ji8 Jj9

( R E V I S I O N

C O N N E C T O R )

3602

JlCil A15d2Jl J400 J$Ol J801

S K 1 1 0 3

Figure 10-3. Al4 and Al5 Test Connectors

10-8 Synthesizer Section