HP BENCH Series Operating And Service Manual page 35

APPENDIX A
MANUAL BACKDATING CHANGES
Manual backdating changes describe changes necessary to adapt this manual to earlier instruments. To
adapt the manual to serial numbers prior to 8C2501, inspect the following table for your serial number and
then make the appropriate changes. For serial numbers 8C2500 and up, check for inclusion of change sheet.
SERIAL
MAKE
CHANGES
Prefix
Number
8C 2101 - 2500
1
7H 0901 - 2100
1,2
7H 0401 - 0900
1,2,3
7D 0100 - 0400
1,2,3,4
CHANGE 1:
In Table 6-4, Replaceable Parts List, make the following changes:
REF.
DESIG.
DESCRIPTION
MFR.
PART NO.
MFR.
CODE
($:
PART NO.
Qll
Change to
SS PNP Si.
40362
02735
1853-0041
R3,4
Change to fxd, met. film 23K.n.±l% 1/8W
Type CEA T-O
07716 0698-3269
R5 Change to
fxd, comp 360KiT.±5% |W
EB-3645
01121
0686-3645
R7
Add
fxd, comp 560Kn ±5% jW
EB-5645
01121
0686-5645
R14
Add
fxd, comp 24jt.±5%
EB-2405 01121
0686-2405
R16
Change to fxd, comp 2.2ICrL±S% -jW
EB-2225 01121
0686-2225
R17 Change to
fxd, comp 6.2Kn.±5% |w
EB-622S 01121
0686-6225
R18
Change to fxd, comp 12]Cn.±5% j-W
EB-1235
01121
0686-1235
R28
Delete
- _ _
S2 Change to
Slide Switch, DPDT | knob.
solder terminal
llA-1138
82389 3101-1172
Change to
P.C. Board Assembly
09182
06215-60020
Change to P.C. Board, Blank
09182
5020-5597
Delete P.C. Board, Front Panel
-
-
-
On schematic, make the following changes:
Delete R28 (open)
Connect R7 from base of 02 to reference voltage -6.2V (Test Point 9)
Connect R14 from junction of Rll and R12 to reference voltage +S.
Change the component location as shown in Figure A-1.
A-l