107
B
Backdating
Manual backdating describes changes that must be made to this manual for power supplies whose serial numbers are lower
than those listed in the title page to this manual.
Look in the following table and located your Agilent Model. Then look at each serial number listed for this group. If the
serial number of your power supply is prior to any of the serial number(s) listed, perform the change indicated in the
Change column. Note that several changes can apply to your supply. You may also be instructed to update your power
supply if certain components are being replaced during repair.
Model 6023A
Change
Model 6028A
Change
Serial Numbers Serial Numbers
PREFIX NUMBER PREFIX NUMBER
3332A 01839-02233 1 3544A 00101-00165 1
3302A 01789-01838 1,2
3215A 01709-01788 1-3
3047A 01559-01708 1-3
2845A 01069-01558 1-4
2704A 00619-01068 1-5
2541A 00364-00618 1-6
2508A 00184-00363 1-7
2428A 00139-00183 1-8
2420A 00124-00136 1-9
2407A 00101-00123 1-10
CHANGE 1
All In the parts list for the A4 Power Mesh Board change Q3, Q4 to PFET p/n 1855-0547. Under A4
Power Mesh Board Mechanical change heatsink (Q3, Q4) to p/n 1205-0256. Add hex head
standoff (Q3, Q4) p/n 0380-1679.
CHANGE 2
6023A In the parts list for the A1 Main Board Assembly change CR1, 3 to p/n 1901-1087. Change
CR2, CR4 to p/n 1901-0759.
CHANGE 3
6023A
In the parts list for the A1 Main Board Assembly change C13, C14 to 0.022
ยตF 10% 1500V p/n
0160-5933.
CHANGE 4
6023A In the parts list for the A1 Main Board Assembly change T3 bias transformer to p/n 5080-1982.
Delete screw p/n 0515-0964, lock washer p/n 2190-0586 and flat washer p/n 3050-0893.
CHANGE 5
