Manual Changes/Model 6269B

Manual HP Part No. 04269-90002

Page -3-

ERRATA :

In the parts list

Under A4 Mechanical, add Transistor Insu- lator, HP Part No. 0340-0795, quantity 2.

Under AS Front Panel Assembly, change the HP Part No. of circuit breaker CB1 to 3105-0034.

CHANGE 9:

In the parts list under A4 Heat Sink Assembly, change the HP Part No. of CR101, 102, 105, and

108to 1901-0318, and change CR103, 104, and

106to 1901-0317.

CHANGE 10:

In the parts list under AS Front Panel Assembly, change R122 to 100 ohms, variable, HP Part No. 2100-1987.

CHANGE 11:

In the parts list and on the schematic, make the following additions and changes:

Under AS: Add C112, fxd, .01µF 3KV HP Part No. 0160-2568

Under A2: Add RV1, varistor, MOV HP Part No. 0837-0117

Change: C110 and C111 have been moved from chassis to the front panel assembly. Connect the added and changed components as shown below.

CHANGE 12:

The following changes enable the master crowbar to trip the slave crowbar(s) when two or more units are connected in parallel. In the parts list under Al Main Printed Circuit Board and on the schematic, change A1C90 to .47µF 25Vdc HP Part No. 0160-0174. Also, add resistor A1R120, 4.7K ¼W HP Part No. 0758-0005. Connect A1R20 in parallel with A1Z2C in the Overvoltage Protection Crowbar Circuit on schematic.

The following change prevents series regulator failure under short circuit conditions. On sche- matic, in the Constant Voltage Comparator Circuit disconnect anode of A1CR6 from A1Z1 pin 1 side of A1R6. Connect anode of A1CR6 to rear terminal A2 side of A1R6.

CHANGE 13:

In the parts list under A4 Heat Sink Assembly. change the part number of CR101 and CR102 to 1901-0729 and change CR103 and CR104 to 1901- 0730.

CHANGE 14:

The RFI Assembly is changed to HP Part No. 06269- 60010. This new RFI Assembly is completely interchangeable in all previously built 6269B power supplies.

In the parts list under A2-Mechanical make the following changes:

Change the Cover, RFI Assembly to 5020- 2284.

Change the Heat Sink, RFI Filter Ass ‘y to

5020-2282.