A
Manual Backdating Changes
Manual backdating changes describe changes that must be made to this manual for power supplies with serial numbers that
are lower than those listed on the title page. Look in the following table and locate your model power supply. Then look at
the serial numbers listed for that model. If any serial number of your power supply is lower than any of the serial numbers
listed, then only make the change indicated in the change column for the serial numbers that are higher than the serial
number of your unit. Note that several changes may apply to your unit.
Model Prefix Serial Change
6541A 3215A 00108 5
3215A 00168 17
3518A 00193 19
3543A 00223 20
3620A 00293 24
6542A 3221A 00113 5
3425A 00238 17
3519A 00293 19
3548A 00338 20
3619A 00393 24
6543A 3218A 00113 5
3425A 00218 17
3619A 00408 24
6544A 3219A 00113 5
3433A 00163 17
3620A 00233 24
6545A 3215A 00118 5
3408A 00148 15
3434A 00168 17
3623A 00218 24
6551A 3207A 00103 4
3424A 00153 17
3533A 00218 19
3549A 00223 20, 21
3624A 00228 24, 25
6552A 3203A 00103 4
3423A 00228 17
3526A 00323 19
3541A 00403 20
3548A 00503 21
3619A 00758 24
3632A 00798 25
Model Prefix Serial Change
6553A 3202A 00103 4
3423A 00281 17
3549A 00401 21
3619A 00481 24
3621A 00486 25
6554A 3205A 00103 4
3422A 00213 17
3604A 00333 21, 23
3620A 00363 24
3623A 00368 25
6555A 3209A 00103 4
3402A 00143 15
3428A 00153 17
3603A 00193 21, 23
3622A 00198 25
3624A 00203 24
6641A 3141A 00106 1
3217A 00111 5
3237A 00131 2
3348A 00236 16
3504A 00281 18
3519A 00296 19
3544A 00351 20
3619A 00406 24
6642A 3142A 00106 1
3218A 00126 5
3235A 00171 2
3347A 00461 16
3502A 00771 18
3518A 00921 19
3542A 01241 20
3619A 01501 24
Appendix A 169
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