HP 5245L - Page 128

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\_
Model 5245L
02349-
1
0524
5-6- r2
Section VI
Check
A23Q9,
Q10
and
Put
A23
on
+
12V
Extender
Chk
Collector
A23Q3
LY/cm, .1
lts/cm
Figure
7-20
-
13V
Gate
Light
On
Left
DCA
counts
at steady
10
sec
rate
Check
Sample
A23Q3,
Q4, Q6
Figure
7-20
_C
&
A
@
heck
Steering
AmPlifiers
Switch
to
frequency
1
/-rs,
remove
A23,
observe
Gate
Light
& Readout
Gate
Flip-Flop
Ckt
22Q2,
Q3, Q4,
Q5,
Q6
Figure
7
-Lg
5Y
/cm
L
1ts/cm
Check
at A22(4)
Figure
?- 19
signal
weak
or
absent
OFF
Gate
Light off
No Count
Check
Trigger
AmPlifier
ckt
A22Q1
Srvitch
to
10
Period
Average;
Observe
Figure
7-
19
Check
A21Q2
Gate
3,
A21CR6, CR12,
A35LA
(FU
& 11)
A1S1A(R+
&
R2+)
A3s1c
(Re
&
5)
(cont'd
from
p.
6-11)
Flashing
signal weak
or absent
Check
Gate
12
Ckt
A21CR15
&
A3S1A
2e4)
Check signal
at
Figure
?- 18
Figure
?-
18
Check
Pulse Amplifier
ckt
A21Q13
Check A1?
lr
@
igure 7-
13
Figure ?-
18
signal
weak
or
absent
Check
signal
at
Check
Collector
A21Q9
Check
Main
Gate
Ckt
Figure 7- 18
(cont'd
from
p.
6-
11)
Figure
?-
18
Ql2
signal weak
or absent
or
absent
Figure
?-
18
Check
Frequency Trig-
ger
Ckt
A21Q3,
Q4
Figure 7-
18
Check
signal
at A21(27)
Figure
?- 18
signal
weak
or
absent
Check
Gate
Amplifier
ckt
A22Q7
signal
weak
or
absent
Gate
Light
Replace
Check
s
Figure ?
-
19
Emitter
A21Q2
Check Period
Trigger
CKt
A21Q5,
Q6
Check
Collector
A21(2e)
A21Q10,
Ql1
Check
Emitter
A21Q1
Figure 7-
18
Figure
?-19
Check
Emitter
Follower
A21Q1
Figure 7
-
18
6-L3
/6-14