Tektronix DM505 Instruction Manual page 73

FOR ANY
MALFUNCTION
WHEN THE CAUSE IS NOT
READlLY APPARENT, FIRST
SUPPLIES.
No
+12
v
SUPPLY
;
FOR
EXCESSIVE
+5 V SUPPLY
v
SUPPLY.
Yes
22. ALSO
FUNCTION
rHlCH
MAY
IS THERE
CHECK MAINFRAME
C H E C K T R A N S F O R M E R
T1001, CRlOlt. C1011, AND
REGULATOR U1021. CHECK
FOR EXCESSlVE LOAD O N
+12 Y SUPPLY BY DlSPLAT
CIRCUIT. ALSO CHECK FOR
MALFUNCTION
IN
t15.75 V
AND -12 V SUPPLIES WHICH
M A Y L O A D D O W N T H E
TRANSFORMER.
ALL SUPPLIES
&
-12
v
SUPPLY
N O
IS THERE
R'
MAlMFnmE
1
Yes
CHECK T R A N S F O R M E R
T1001, CR1111, C1111, AND
REGULATOR U1121.
ALSO CHECK FOR EXCESSIVE