Tektronix 2430 Service Manual

6-98 REV JUL 1987
4. The Instruction Memory Data lines into the Waveform j..lPcan also be checked to determine if any
of the lines are shorted or open. Check against the schematic to see which lines (100 through IDF)
are normally pulled up or normally pulled down for the Kernel test.
Waveform j..lPInstruction Bus Address Lines Waveform j..lPData Bus Address Lines
Signal
Location
Period
Signal
Location Period
IA9
TP5BO 409.6 j..lS
WAB
U562-9 1.6384 ms
lAB
U490-22 204 .B j..lS
WAA TP562
B19.2 f.lS
IA7
U490-23 102.4 j..lS
WA9
U562-5 409.6 j..lS
IA6
U490-1
51.2 f.lS
WAB U562-2
204.8 j..lS
IA5
U490-2
25.6 us
WA7 U364-19
102.4 us
1M
U490-3 12 .B j..lS
WA6 U364-16
51.2 us
IA3 U490-4
6.4 j..lS
WA5
U364-15 25.6 j..lS
IA2
U490-5 3.2 j..lS
WM
U364-12 12 .B j..lS
IA1
U490-6 1.6 j..lS
WA3
U364-9
6.4 os
lAO
U490-7 BOO ns
WA2
U364-6
3.2 f.lS
CLK2D
U490-B 200 ns
WA1
U364-5 1.6 j..lS
WAO
U364-2 BOO ns
3. With the power on in the Kernel mode, the Instruction Data Bus lines are pulled up or pulled down
in a command that causes the U470 to address every instruction in its memory sequentially and
continually. Instruction address bus lines and data address bus lines can be checked for activity.
All the Instruction address bus lines and the data address bus lines with the exception of the top
five (WAA through WAE) increment with the periods shown in the following tables. WAA through
WAE will be fixed random values because page switching of the memory is not done and is not
set to any known state in the Kernel test.
2. Remove jumper J128 (Waveform j..lP Kernel Mode) and jumper J1B4 (Waveform j..lP Reset
Release). Both are located on the Processor board near Waveform j..lPU470.
1. Turn off the power and place the processor system in the BUS ISOLATE mode (see the preceding
steps).
This mode is used when a fault has been found on either the System j..lPdata bus or the System j..lP
address bus while in the BUS CONNECT mode or when SELF TEST 5100 (RUN TASK) fails in the
Extended Diagnostics menu.
Waveform j..lPKernel Mode:WAVEFORM j..lP
Table 6-6 (cont)
Maintenance-2430 Service

Tektronix 2430 Specifications

General

Brand	Tektronix
Model	2430
Category	Test Equipment
Language	English