HP 6269B Operator’s, Organizational, Direct Support And General Support Maintenance Manua L page 86

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
108 to 1901-0318, and change CR103, 104, and
106 to 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.
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 Cir-
cuit 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 inter-
changeable 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.
In the parts list