HP 8642A Operating Manual page 587

Model 8642A/B
Service
CHANGES
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All Serial PreHfatfes^
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:
i::^i:iii^:ii:iiii::i:iriii:.::^iii:Lri:LHi:>:i.:;i^iLi!^!^i^h!^i
:^:ik^k.&m$MWW $3f§$t
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On the schematic:
• C13, R4, R5 - In VOLTAGE CONTROLLED OSCILLATOR,
change the value of the following components to these new
values;
C13 - 3.9p
R4 - Ik
R5 - Ik
■2S50A:^nd abbvet On the Component Locator;
• C90 - In grid location A,l add C90 to the left of C2 and just
above CR10, following the contour of the EMI strip,
In Component Coordinates:
• C 9 0 - AddC90A,l.
On the schematic:
• C90 - In the VOLTAGE CONTROLLED OSCILLATOR, add
C90 from +1 5V (Fl) to ground.
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SS23
8K-112.I