HP 3456A Operating And Service Manual page 6

Section
VIII. SERVICE (Cont'd)
•
8-176. (nguard Logic (A30 Board) .......... 8-31
8-177. General ......................... 8-31
8-181. Isolation Logic ................... 8-31
8-191. Range and Function Control. ...... 8-35
8-224. Outguard Section
(A3 and A4 Boards) .............. 8-43
8-225. General ......................... 8-43
8-231. Main Controller CircuilS
(A4 Boards) ..................... 8-43
8-256. Isolation Logic (A) Board) ......... 8-48
8-264. Keyboard Scan Logic .............. 8-49
8-272. Display and Annunciator Drive ..... 8-50
8-280. Keyboard Display, and
Annunciator Circuits ............. 8-50
8-28S. HP-IB .......................... 8-SI
8-296. Power Supplies ................... 8-53
8-309. Troubleshooting ................... 8-55
8-310. Introduction ..................... 8-55
8-313. Board Removal and Installation ..... 8-55
8-317. Service Group Summary ........... 8-57
Table
1-1. Specifications .......................... 1-2
1-2. Recommended Test Equipment ........... 1-8
3-1. Error Messages ........................ 3-4
3-2. Registers and Math Listing .............. 3-10
Default Delays ........................ 3-11
3-3.
3-4. Optimizing Reading Rate ............... 3-12
3-S. Interface Functions .................... 3-18
3-6. 3456A Clear, Home and Reset Difference. 3-19
3-7. Status Byte Definition .................. 3·20
3-8. 3456A Address Codes .................. 3-22
3-9.
3456A Program Codes ................. 3-24
4-1. Recommended Test Equipment ........... 4-3
DCV Test Limits ....................... 4-5
4-2.
4-3. Ohms Test Limits ...................... 4-8
4-4.
ACV Test Limits ..................... ,4-10
5-1. 3456A Adjustments ..................... 5-1
S-2. DCV Test and Adjustment Limits ......... 5-5
S-3. Ohms Test and Adjustment Limits ........ 5-8
5-4.
ACV Test and Adjustment Limits ......... 5-9
6-1. Standard Abbreviations ................. 6-1
6-2. Code List of Manufacturers .............. 6-2
6-3. Exchange Assemblies ................... 6-2
6-4.
Replaceable Parts ...................... 6-3
7-1 .
Manual Changes ....................... 7-1
7-2. Data Bus (00-D7) Signatures ............. 7·6
7-3. Individual ROM Signatures .............. 7-6
8-1.
A20 Board Component
Numbering Structure ................. 8-4
8-2. Comparator Operation .................. 8-4
8-3.
Input Amplifier Gains ................... 8·9
8-4.
Runup Integration Time Periods ......... 8-10
8-S.
Readout Digit Generation
During Runup ...................... 8-12
TABLE OF CONTENTS IC.nl'd)
Page Section
VIII. SERVICE (Cont'd)
8-324. Component Reference Designator ... 8-57
8-327. Selecting the Self-Test. ............ 8-58
8-334. Self-Test Troubleshooting .......... 8-59
Service Group A ............................ 8-A-0
'
Service Group B
Service Group C
Service Group D
Service Group E ............................. 8·E-0
Service Group F
APPENDICES
Appendix A
Appendix B
Appendix C
Appendix D
LIST OF TABLES
Page
Table
8-6.
8·7.
8-8.
8-9.
8-10.
8-11.
8-12.
8-13.
8·14.
8-A·I.
8-A-2.
8-A-3.
8-A-4.
8-A·S.
8-A-6.
8-8-1.
8-8-2.
8-8-3.
8-C-1.
8-0-1.
8-0-2.
8-0-3.
8-E-1.
8-F-1.
8-F-2.
8-F-3.
SERVICE GROUPS
. . . . . . . . • . . • . . . .
. . . . . . . . . . . . . . . .
. . . . . . . . • . . • . . •
. . . . . . . . . . . . . . • .
Slope Generation
. . . . . . . .
Ohms Current Source
. . . .
AC Converter Stage Gains .............. 8-29
Range Decoding U701 .................. 8-36
Gain Decoding U701 ................... 8-36
A30 Board Jumpers
and Plugs/Jacks .................... 8-40
3456A Service Group Listing ............ 8-55
Component Numbering ................ 8-57
3456A Self-Test Limits ................. 8-58
Data Bus (00-D7)
Signatures ........................ 8-A-3
Address Bus (AO·AI5)
Signatures ........................ 8-A-J
Rom Select (A4U6)
Signatures ........................ 8-A-3
Individual ROM Signatures ............ 8-A-J
Strobe Signatures .................... 8-A-5
Rom Select Signatures.........
AID Converter Signatures ............. 8-B-8
AID Slope Configuration .............. 8-B-9
Static State of the
AID Digital Circuitry ............... 8-8-9
Inguard Switch Closure Commands ..... 8·C·2
Ohms Gain and Currents .............. 8-D-I
Ohms Switch Closure Commands ....... 8·D·2
Range Failures and
Defective FETs .................... 8-0·7
ACV Switch Closure Commands ........ 8·E·)
Inguard Power Supply Locations ....... B-F-I
Power Supplies Levels ................. 8-F-2
Power Supplies Jumpers and Location ... 8·F-2
Page
8-B-0
. . . • . . . . . . . . .
8-C-0
. . . . . • . . . . . . .
8-D-0
. . . . . . . . . . . . .
8-F-0
. • . . . . • . . . . . .
Page
8·14
. . . . . . . • . . . . . .
8·18
. . . . . . . • . . . . . .
. ... 8-A-5
Rev B v