User's Manual

SERVICE MODEL 8559A
Observe
1st L.O.
Isolate YTO
Main Coil
Tune Driver
Isolate YTO
FM
Source of FM
Replace Tune YES
Coil Driver
is YTO
FM
Voltage with Coil Driver
0 I0
Source of FM Source of FM is
1s nain coil FM/Main Coil
Tune Driver
FM?
0 II NO
1
Replace -1OV
Isolate YTO Source of FM
Regulator with Main Coil is FM/Main
Battery
Fixed Driver Coil Switch
Ir
Source of FM
NO
in -iOV
Source of FM
NO
Regulator is ~ain coil
Fixed Driver
0 II . 0 19
in Tune/Full
Span Voltage
LEOEND FOR INFORMATION BLOCKS
Text Annotation
Schematic Block Reference
Reference
Step Instruction
goes here.
Iaolate YTO
Main coil
Filter
1.
+fpq
YES
Source of
FM
is YIG - Tuned
Oscillator.
A6
I d
FIGURE 8-26, RESIDUAL FM TROUBLESHOOTING FLOWCHART