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HP 811 OA Service Guide
Power Supply Unit
For the purpose of this description the Power Supply can be thought
of as being in 2 parts : The Primary Section, or input section, and the
Secondary Section, or output section .
Caution
Some voltages on the Primary Section of the Power Supply are
dangerous and can kill . For your own safety do not touch these parts .
Using an isolating transformer may prevent these voltages from being
fatal, but electrical shocks from the unit can cause serious discomfort,
especially on capacitors C406, C407 and C408 (see diagram in
"Troubleshooting" chapter for their position) .
7-4
Functional Description
Figure 7-2 shows the functional units in the Power Supply Unit,
with the Primary Section on the left of the diagram and the
Secondary Section on the right. These have been numbered for easy
cross-reference between the description and the diagram .
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