HP 5334B Service Manual page 201

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 l T L 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