TM 10-4510-206-14
5-7.
REPAIR PROCEDURES
m.
UV Scanner and Fl
If the buzzer
10.
11.
(CONT'D)
ame Safeguard Control Test and Repair
(Cont'd).
NOTE
sounds, an ignition failure is indicated.
Organizational maintenance has determined that ignition takes place
momentarily but system shuts down immediately after ignition.
.
With
multimeter set for dc operation, press reset pushbutton.
Check
voltage at test points (S1) and (S2). If voltage is not 5 to 6
vdc, replace UV scanner (step 12).
Organizational maintenance has determined that ignition does not
occur after pressing reset pushbutton but buzzer sounds.
With
multimeter set for ac operation,
check for 120 vac at test points
(2) and (5) after pressing reset pushbutton. If voltage is O,
replace flame safeguard control circuit card by loosening two
screws and lifting card out.
5-62
Change 4
