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8-18.
8.19.
8-20.
8.21.
s-22.
8.23.
8-24.
8-25.
8-26.
8.27.
8-28.
S-29.
8-30.
8-31.
832.
8-33.
Page
Power Up Tests and Error Messages .8-81
Key Code Patterns.. t t t t t t I8.82
Signal Conditions for Front Panel
Keyboard to Front Panel Indicators
Operation .8-83
Diagnostic Tests .8-86
MPUAddreaaLine andaddress
Decoder Signatures. .8-88
Diagnostic ROM (U3) Signatures , *, ,8-88
MPU Signatures , . , . *. *, .8$8
Timing, Interrupt and Buffered
Data Circuits Signatures .8-90
MPU Timer and IRQ Encoder
Signatures . .8-90
Frequency Data sigeaturea * * * .8-92
Front Panel Driver Assembly
Signatures .8-92
Divide-by-Three Circmt Signatures 8-94
RAM Assembly Signatures .8-95
ROM Error Codes .8-96
ROM and Converter Signatures.. .8-97
Frequency Diagnostic Output
Lines Signatures , t , t , , t .8-100
Table
8-a4.
8-35.
8-36.
8-37.
838.
8-39.
8.40.
8-41.
8-42.
8-43.
8-44.
8.45.
8-46.
8-41.
Frequency Diagnostic Input Lines
Signatures ......................... ..8.10 0
Frequency Output-HP-IB Ammbly
Diagnostic .......................... .8-100
HP-IB Diagnostic Output Lines
Signatures.. ....................... ..8-10 2
HP-IB Diagnostic Input Lines
Signatures.. ....................... ..8.10 2
HP-It3 Diagnostic Signatures .......... .8-103
Miscellaneous Signatures .............. .8-106
Error Codes and Associated Lines. ..... .8-106
I/O kssembly Diagnostic Signatures
(with Special Extender Board) ....... .8-107
I/O Assembly Diagnostic Signatures
(without Special Extender Board) .... .8-111
Key Code Patterns ..................... .8-116
Processor Assisted Diagnoaiic
Signatures.. ....................... ..8.118
Freerun Diagnostic Signatures .......... S-121
DAC and Enable DiagGatic
Signatures ......................... ..8-12 4
A6AlO Voltage Checks ................ .8-129
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