HP 3562A, Service Manual

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SERV I C E
MOD E L 3562A
Table A7-1 FPP Diagnostics
Test Messages Passes Fails
Su bblocks verified Perform Signature
Analysis Tests (D)
in order l isted
FPP Function Test:
Floating Point Processor A l l subblocks of the FPP are Continue with
exercised. If this test self-tests
passes but an FPP function is fail-
ing, perform SA test #2 and #4.
Command Pointer Test:
FPP Command Poi nter Test Command Poi nter Registers SA #1
Bits correspond to B bus 0 DT ACK Ci rcuit SA #2
to 1 5 and
Y
bus 0 to 23 FPP I nterrupt Circuit SA #3
G lobal Data Bus Output Reg isters
SA #4
Partial verification of ALUs
FPP Interrupt Test
FPP I nterrupt Ci rcuit The FPP did not return
I RQT3 to the CPU after
ru n n ing a test. Conti nue
with self-tests.
Jumper Echo Test:
FPP J umper Echo Bits Command Poi nter Registers SA #1
correspond to B bus 0 to 1 5 DT ACK Ci rcuit SA #2
and
Y
bus 0 to 23 FPP I nterrupt Ci rcuit SA #3
G lobal Data Bus Output Registers SA #4
Partial verification of ALUs
Block Set Test:
FPP Address Test Bits G lobal Address Registers SA #1
correspond to B bus 0 to 1 5
G lobal Data Bus I nput Registers SA #4
Atv Test A:
FPP ALU Test A Bits Partial verification of ALUs SA #2
correspond to
Y
bus 0 to 23 SA #3
SA #4
ALU Test B:
FPP ALU Test B Bits ALUs
SA #2
correspond to
Y
bus 0 to 23
Carry Look-ahead subblock SA #3
S h ift PA L (U21 2) SA #4
Status Mu ltiplexer (U201 )
Sequencer
Reset FPP Test:
FPP RESET Test
Pipeline Data Bus SA #3
Partial verification of
SA #4
Sequencer
If a l l the self-tests fail, start with signature analys is test #1 .
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