Specifications

Page 12
Copyright 2006 Robert A. Larson, KC9ICH
CHART II
Unit Inoperative - Display Lighted with 25.500
BAD
Check for waveform B at A1-C-6.
See Figure 4-2
Go to Chart III
OK
Check for input at base of Q1.
Check for input at collector of Q1.
OK
Check for 10 ms. Bursts of input
signal at A6-B-6.
OK
See chart I for symptoms and causes
or chart III for timing system
troubleshooting.
OK
BAD
Defective C9 or coax cable. Analyze
and repair.
BAD
Look for open L1, shorted C10, or
defective Q1.
BAD Replace A6.
Check for 10 ms. Bursts of input
signal divided by 10 at A15-12.
OK
BAD Replace A15.