HP 3562A Service Manual page 526

S E RV I C E
Test Messages
FPP Function Test:
F loating Point Processor
Command Pointer Test:
FPP Command Poi nter Test
Bits correspond to B bus 0
to 1 5 and Y bus 0 to 23
FPP Interrupt Test
Jumper Echo Test:
FPP J um per Echo Bits
correspond to B bus 0 to 1 5
and Y bus 0 to 23
Block Set Test:
F P P Address Test Bits
correspond to B bus 0 to 1 5
A t v Test A:
FPP ALU Test A Bits
correspond to Y bus 0 to 23
ALU Test B:
FPP ALU Test B B its
correspond to Y bus 0 to 23
Reset FPP Test:
FPP R E S E T Test
If a l l the self-tests fail, start with signature analys is test #1 .
8-76
Table A7-1 FPP Diagnostics
Passes
Su bblocks verified
A l l subblocks of the FPP are
exercised. If this test
passes but an FPP f u n ction is fail-
ing, perform SA test #2 and #4.
Command Poi nter Registers
DT ACK Ci rcuit
F P P I nterrupt C i rcuit
G lobal Data Bus Output Reg isters
Partial verification of ALUs
F P P I nterrupt Ci rcuit
Command Poi nter Registers
DT ACK Ci rcuit
FPP I nterrupt Ci rcuit
G lobal Data Bus Output Registers
Partial verification of ALUs
G lobal Address Registers
G lobal Data Bus I nput Registers
Partia l verification of ALUs
ALUs
Carry Look-ahead subblock
S h ift PA L (U21 2)
Status Mu ltiplexer (U201 )
Sequencer
Pipeline Data Bus
Partial verification of
Sequencer
MO D E L 3562A
Fails
Perform S i gnature
Analysis Tests (D)
i n order l isted
Continue with
self-tests
SA #1
SA #2
SA #3
SA #4
The F P P d i d not return
I RQT3 to the CPU after
ru n n ing a test. Conti nue
with self-tests.
SA #1
SA #2
SA #3
SA #4
SA #1
SA #4
SA #2
SA #3
SA #4
SA #2
SA #3
SA #4
SA #3
SA #4