8662A Option H25
08862-92039
Page 7 of 17
SECTION VIII. SERVICE
Generally throughout the Service Manual, change all references to "A2A4 Frequency Output
Assembly" or "A2A4 Frequency Output Board" to "A2A4 Frequency Output/Direct Frequency
Access Assembly".
On page 8-201, under Digital Control Unit, change the second sentence to read as follows:
It takes information from the keyboard, HP-IB interface AUX connector, or Direct
Frequency Access connector.
On page 8-202, under Instrument Level Troubleshooting, change the first sentence under 3a
to read as follows:
Front panel, HP-IB, AUX, and DIRECT FREQUENCY ACCESS malfunctions.
On page 8-203, incorporate the following into Table 8-202:
Connector
DIRECT FREQUENCY ACCESS INPUT
Troubleshoot Assembly (Service Sheet)
A2A4 (12, 13, 13A)
On page 8-205, on Service Sheet A, replace part of Figure 8-201, Overall Block Diagram,
with the partial figure on page 11 of this Insert.
On page 8-207/8-208, on Service Sheet B, replace part of Figure 8-202, Digital Control Unit
(DCU) Block Diagram, with the partial figure on page 12 of this Insert.
On page 8-325, on Service Sheet 12, replace the top half of Figure
8-335
with the top half of
Figure 8-338, P/O A2A4 Frequency Output/Direct Frequency Access Assembly Block Diagram,
found on page 13 of this Insert.
Also,
on page 8-325, in Figure 8-336: at the upper left corner, replace "P/O A2A4 Frequency
Output Board (08662-60167)" with "P/O A2A4A1 Frequency Output Board (08662-62033)"; and
in the lower right corner, replace "P/O A2A4 Frequency Output Board Schematic" with "P/O
A2A4 Frequency Output/Direct Frequency Access Assembly Schematic."
Copyright 1986 - HEWLETT-PACKARD COMPANY - Spokane Division
24001 E. Mission Ave, Liberty Lake, WA 99019-9599 U.S.A.
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