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Chapter 6 Backdating
Backdating Hardware
CHANGE 3 (New TCXO boards)
Page 2-47. Troubleshooting the Counter
Add the following as step 4a:
4a
If the Counter under test contains Option 010 or 012 High
Stability Timebase, perform the following:
a. Disconnect the power supply's two-wire cable from J2 of
A6 High Stability Timebase Assembly as shown in Figure 2-10.
Figure 2-10. A4 AC Power Supply -9V Output Check (Option 010/012
Only)
6-4
A6
High Stability
Timebase
Assembly
J2
1
3
I
N
P
t
U
E x
T
A r m
S
Assembly-Level Service Guide
GND
(Wht)
-9V
(Gray)
A4
AC Power Supply
Assembly
9 2
1 - A
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E
US
IR
RY
EL
TO
IS M
TO
O NN
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E
RA
RS
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LI FI
BO
PE
LA
Q UA
R LA
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3 2
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EL
FO
US
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n .
- 2
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FO
UR
R PE
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R S
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0 1 0
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ll
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In
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