SAC SS-800AVS Manual page 117

CIRCUIT: Electronic Keyer (Recycle and Letter PWB).
TEST POINT: Pin 1 of all Keyer PWB's.
MODE: AC power applied.
INDICATION REMARKS ACTION
DC Voltages
Normal.
+12.0 to 14.5 V
or Trouble lies with Less than +12
greater than 16 V.
Check Auto Shutdown
PWB regulator circuit
first, then check for
~shorted Keyer PWB.
Auto Shutdown PWB or
Keyer PWB.
CIRCUIT :
TEST POINT:
MODE :
INDICATION
REMARKS
DC Voltages Normal.
0 V
Electronic Keyer (Recycle and Letter PWB).
Pin 17 Recycle PWB.
AC power applied. Sl on Recycle PWB in CONT.
ACTION
CIRCUIT: Electronic Keyer (Recycle and Letter PWB).
TEST POINT: Pin 17 Recycle PWB.
MODE: AC power applied. Sl on Recycle PWB in IDENT.
INDICATION
DC Voltages
Fluctuation between)
V and approximately!
12 V at code rate of
7 w.p.m.
0 V steady.
12 V steady.
REMARKS
Normal.
Steady keying tone
present.
No keying tone.
ACTION
Check Q1 and Q2.
Check SI. Check for
Defective Letter PWB.
Check same as above.
Check Q3 and Q4.
126
Southern Avionics
Company
SS-800AVS