3.
Insert a 16 pin jumper chip
(HP
Part Number 1251-4787)
in
the U705 and U706 designations on
A1
Main
Board. Place the jumper chip
in
such a
way
that pins
1,
10,
11,
and
20
are not
jumpered, as shown in the following illustration:
Jumper
Configuration for Sockets XU705 and XU706
4.
Insert three jumpers (or
0 ohms resistors) in the R271, R272, and R273 designations, located in
the U702 designation (see
Figure
8-19.
HP
5334B
Component Locator).
5.
Short together
"CLK" signal to
"GND"
(ground) by placing a jumper wire between pins
7
and
9
of 5701.
C.
Switch
ON
the
HP
5334B. If the failure message does not appear, then you know the failure is in the
MATE
Block; therefore, continue with the the following troubleshooting steps.
d. Verify that the following power supplies are within the specified range on the MATE Block:
supply
Test Point Range
e. Verify the following signal levels in the
MATE
Block:
a
The reset signal (5701 pin
8)
should switch from a low to high level between 100 and 200 ms after
the power supply reaches
+
4.8V from power off.
a
The NMI signal (U702 pin 4) should be at a TTL high.
a
The IRQl signal (J701 pin 10) should be at a lTL high.
a
The clock signal (5701 pin 7) should be a
1
MHz TTL square wave.
These signals should be correct before continuing with the signature analysis troubleshooting.
HP
5334B
-
Service Manual
8-81
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