TAB LE 4
Firing circuit check. For all tests in this paragraph connect
a
1 kohm
10 W resistor across CBO .
(Voltages within brackets refer to 60 V models) .
Ref. Important
control
Test
equipm.
no
s ettings
connection
I
Output volt. 32V
Check F50
(60V) . OV P off
No load.
II
As
above
DC voltm .
TC : T9
III
As
above
Os cil. TC : TA
IV
As
above
DC voltm .
TC : Z5 1+
v
As
above
DC voltm.
TC : T54e
VI
As
above
Oscil . TB : TC
VII
As
above
As above.
Short T53b
to T53e
.,.
Correct
Remedy
reading
If blown check T52, R48 .
If not,
cont.
II
12V
+
5%
Faulty : check Z50, D54-57
Correct: check
III
1 2
Faulty: check T55, T56
Correct: check
IV
4
l O m S
t
6 , 2
v
Faulty�
check Z 5 1
.:::. 5%
Correct: check V
5- 7 , 5
v
Higher : check T54
check VI
30V
-
tOmS
No pulses : cont. VII
Con tin.
Correct: check T53
pulses
No pulses : check T52,
Tr50 and F50 .
