CHECK 39B OSCILLATOR
from terminal 201
touch it to center
waveform
present
peak-to-peak
waveform
present
No
Yes
No
Yes
Yes
No
form be adjusted
peak-to-peak
39B oscillator
from terminal 201
repeat from
of
FB687
pack and
terminal 018 and connect
it to terminal 201 of
removed from service
associated with clock
chain removed from
service [TABLE A]
FB687
pack associated
replace
FB687
pack
to-peak, and replace
level adjustment cover
with clock chain
of
FB687
pack and
pin of oscillator
output jack
level adjustment
potentiometer to
connector
P13
connector
P13
between 0.87 volt
and 0.97 volt
to 0.92 volt
No
adjustment cover from front
left side of 39B oscillator
[39] Remove probe from
[40] Is waveform
[42] Is
[43] Remove
[44] Remove probe
[45] Is
[41] Remove probe and
[48] Remove oscillator
[49] Could wave-
[50] Remove probe
RF OUTPUT
RF OUTPUT
[47] Replace
measure 0.92 volt peak-
cable problem and
repeat from
Step 5, Page 1
between 1.4 volts
and 2.4 volts
peak-to-peak
Yes
potentiometer to measure
1.9 volts peak-to-peak,
and replace level
adjustment cover
being tested, adjust
oscillator output
[37] Is waveform
[38] Remove level
[46] Correct
Yes
No
cover [Figure 1], adjust
DLP
234-151-013
538
Issue 8
DEC 1995
PAGE 6 of 9
