5-22 Troubleshooting Charts
Figure 5-22.Troubleshooting Flow Chart for Synthesizer
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START
Check 2.8V at E0001, E0002, E0013,
E0003, E0004, E0007.
Check 1.8V at L0008, E00012, E0017, E0005
E0006, E0010.
Check 3.6V at E0023
Are supplies
present?
Inspect supply from
U3000
Is D0161_Pin
2 output ~11 -
13.2VDC?
Is L0004 =
2.775V?
Inspect L0004
Is 2.8Vpp with 9.6MHz
square wave at pin
#A46 & A47 of U0001?
Inspect U0001
Inspect D0160, D0161, C0161,
C0162, C0163, C0164
Is Super Filer
output < 4.5V?
Inspect R0019
Is R0019
= 2.8V?
Is 38.4MHz
signal from
Y0140?
Is 38.4MHz
signal from
E0021?
Is E0001
output =
2.8V?
Inspect E0001
Inspect Y0140, R0140, C0140, C0141,
C0142 and C0143
Inspect U0001
Inspect E0021, C0034 and U0001
Check VCO
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