HP 3562A Service Manual page 377

FAU LT I SO LAT I O N
D. Perform steps 1 through 3 as fo l l ows for each of the rem a i n i n g assem b l ies. Replace
the asse m b l ies in the fol l owing order:
A6 D igital F i l ter Control le r
A 7 F P P
A1 D igital Sou rce
A4 Local Osc i l l ator
A31 Trigger
AS Digital Fi l ter
A34 ADC 2
A3S I n put 2
A30 Analog Source
A32 ADC 1
A33 I nput 1
1 . Press the l i ne switch off.
2. Rep lace the assembly.
3. Press the l i ne switch on. The L E Ds pass sequence shou ld occu r and A2 DS1 shou ld
be off. If the L E Ds pass seq uence does not occu r, go to part E .
E . Power-U p Tests Code Table
After the power-up tests are completed, use table 7-4 to h e l p dete rm ine the cause of the
fai l u re. (Refer to the beg i n n i ng of this section for �he description of the power-u p test
sequen ce). The tab le l ists the tests in the order they are run. The A2 Test L E Ds H ex code
is l isted on the vertical axis of the tab le. The assembl ies and subb locks tested or used
by the power-up tests are l isted on the horizontal axis of the tab l e .
There are two sym bols used i n tab le 7-4: 0 a n d X. When t h e sym b o l " 0 " is used in the
table, the assembly or subbloc k is used in the test but is n ot a l i kely cause of the fai l u re.
When the symbol "X" is used in the tab l e, the asse m b ly or subblock i s the probably the
cause of the fai l u re. t'- � o sym b o l means the assembly or subb lock is not used in the test.
reset line, can cause false error codes. If an error code is caused
by the last assembly inserted, it is probably the assembly defective.
7-1 4
EXCEPTION NOTE
MOD E L 3S62A