HP 8112A Operating, Programming And Servicing Manual page 342

Control Board
Microprocessor Board
1 3
Change
Main Board
B-8 Backdating
In Appendix A, Table A-3 delete :
A l 081 12-66501 C204,205,224,225,244,246
CR200,201 ,220,221 ,240,241 DIODE
R214,R229,R249
In Appendix A, Table A-3 add :
Al 081 12-66501 C203 ,223 ,243
R213,
R227,228,246,247 R-F 2.21 k
In Appendix A, Table A-4 modify :
Reference
A2 08112-66502 R62 *
R64 *
VR2 *
VR4 *
In Appendix A, Table A-5 add:
A3 08 1 16-66523 Wl
Component changes to improve slope accuracy and prevent erroneous
error message "E31"
For instruments with serial number 2136G00780 and lower, make the
following changes to the appropriate parts lists:
In Appendix A, Table A-3 modify :
Al 081 12-66501 C305
Reference Description
C-F
R-F 31.6 k 1 %
Reference Description
C-F
R-F 10 k
Description
R-F 5 1 . 1 kl
R-F 5 1 . 1 kl
DIODE ZENER 4.3 V 1 % 1902-0949
DIODE ZENER 4.3 V 1 % 1902-0949
Reference Description
Jumper
Reference Description
C-F 1000 pf 2%
R-F 5.2 k
R15 1 % . 125W 0698-8863
HP Part #
0.47 µF 0 160-0575
1 90 1-1068
0698-3160
HP Part #
0 . 1 µF 0 160-0576
1 % 0757-0442
0757-0430
HP Part #
0757-0458
0757-0458
HP Part #
8 159-0005
HP Part #
0 140-0178