Service manual
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
US36480101
SG41000110
1, 2, 4, 5, 6
3
7
9
10
10
3349A 00104
3349A 00108
3514A 00123
3514A 00178
3619A 00203
US36420101
MY41000109
6
3
7
8
9
10
10
Model 6681A Model 6684A
3319A 00154
3336A 00164
3350A 00172
3350A 00183
3350A 00193
3506A 00218
3619A 00383
US36400101
MY41000114
4
1
2, 6
5
3
7
9
10
10
3339A 00103
3405A 00108
3405A 00109
3514A 00118
3514A 00188
3514A 00257
US36410101
MY41000115
5
3
6
7
8
9
10
10
Model 6682A
3349A 00104
3349A 00108
3514A 00123
3514A 00168
3624A 00193
US36440101
MY41000106
6
3
7
8
9
10
10
Change 2 continued
In Table 5-7 A3 FET Board
CHANGE R250, from 60.4K P/N 0698-3572 to
Change 1
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.
In Table 5-14 A10 Control Board
C229, from 0.022uF P/N 0160-4918 to
DELETE
C548, 0.1uF 50V P/N 0160-4835 in parallel
0.01uF 100V Ceramic P/N 0160-4832.
with RT 500 In Table 5-9 A5 DC Rail Board
DELETE
C418, 0.022uF 250VAC "Y" rated P/N
Change 2 0160-4048
In Table 5-7 A3 FET Board Fuse Clips, REF F420 & 421 ¼” P/N
DELETE
ADD
CHANGE
C228, 231, 2000pF 100V P/N 0160-2301
C228, 6800pF 100V P/N 0160-4904
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
ADD
CHANGE
2110-0726, qty, 4.
Fuse Holder, REF F420 & 421, 5 x
30mm P/N 2110-0689, qty 2.
F420 & 421, from 0.5A 500V P/N
2110-0934 to 0.5A 500V 5x30mm P/N
2110-0921.