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Backdating 149
A
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 locate 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.
Serial Numbers Change Serial Numbers Change
Model 6680A Model 6683A
3318A 00111
3318A 00116
3502A 00126
3619A 00167
1, 2, 4, 5, 6
3
7
9
3349A 00104
3349A 00108
3514A 00123
3514A 00178
3619A 00203
6
3
7
8
9
Model 6681A Model 6684A
3319A 00154
3336A 00164
3350A 00172
3350A 00183
3350A 00193
3506A 00218
3619A 00383
4
1
2, 6
5
3
7
9
3339A 00103
3405A 00108
3405A 00109
3514A 00118
3514A 00188
3514A 00257
5
3
6
7
8
9
Model 6682A
3349A 00104
3349A 00108
3514A 00123
3514A 00168
3624A 00193
6
3
7
8
9
CHANGE 1
In Table 5-14 A10 Control Board
DELETE
C548, 0.1uF 50V, Agilent P/N 0160-4835 in parallel with RT500.
CHANGE 2
In Table 5-7 A3 FET Board
DELETE
C228 & 231, 2000pF 100V P/N 0160-2301.
ADD
C228, 6800pF 100V P/N 0160-4904.
CHANGE
R247, from 75K P/N 0757-0462, to 42.2K 1% 1/8W P/N 0698-3450.
R249, from 13.1K P/N 0757-0444, to 7.5K 1% 1/8W P/N 0757-0440
R250, from 60.4K P/N 0698-3572 to 40.2K 1% 1/8W P/N 0698-3499.
R253, from 12.5K P/N 0698-6533 to 17.8K 1% 1/8W P/N 0698-3136.
C229, from 0.022uF P/N 0160-4918 to 0.01uF 100V Ceramic P/N 0160-4832.