Advertisement
PD-6010
Defective power supply
Check
for breaks in solder
bridge pattern
Check
power
switch
and
power cord
120V/60Hz TYP values
IN
+16
~
17V
—16
~-17V
+10
~
11V
-10
~
—11V
Collector
Emitter
—30V to
—33V
—26V
TYP values
Is the Q11
collector at
H
|NO
level?
YES
Is the DQ anode about
—6V?
YES
Check
around
R120, Q11
and C73 for solder bridges
and other soldering faults
Is input
applied
to
IC6,
|NO
1C9, 1011, and 1C12?
Is the
reset time constant
normal?
\
\
=
+5V
|
power supply
|
I
t
1
1
Check
for
solder
bridges,
pattern
cracks,
and
other
soldering faults
|
Check
around
R118,
R121
|
|
and C74 for solder bridges
and other soldering faults
Reset pin
|
\
bat eae
Approx. 0.6 sec.
Normal
|
i
|
{
|
|
l
|
Power
on
/off
switching
noise
Is the Q21
collector at H
level
{about
+10V)
when
the
power
is switched
on
or off?
Check D9 thru D12, C131,
C132,
and
R155
thru
R158
for
solder
bridges
and other soldering faults
Check
Q17
thru
Q20
and
R155
thru
R158
for sol-
der bridges
and other
sol-
dering faults
Check
R167
thru
R173,
D11
and
D12, and
C131
for solder bridges and other
soldering faults
Advertisement
