HP 8642A Operating Manual page 507

S e r v i c e
M o d e l 8 6 4 2 A / B
No tes :
1. Each nodule in the HP 8643 has a nine digit nodule indentification code. The first four digits comprise the
nodule configuration code. Hhen servicing a nodule, note any changes that apply specifically to its nodule
configuration code.
2. v l is a connon connect point to circuitry shown in FH range select. It is connected to the outer conductor
of JE.
3. All circuit boards are Manufactured using a hot air leveled process. These boards require extra care when
replacing components. Refer to General Service Information, paragraph 8-3.
A2
K1-K6
TOP VIEW
8 7 6 5
on-La
-iav
l a
A2
U26
TOP VIEW
S c h e m a t i c G e n e r a l I n f o r m a t i o n
8 J - 1 1 0