Probe, Probing Information, And Interposer Check; Probe Setup And Accessories; Probe Power; Probe Test - IBM 5256-1 Maintenance Information Manual

196
PROBE, PROBING INFORMATION, AND
INTERPOSER CHECK
Probe Setup and Accessories
1.
Set up the probe as follows:
a. Set the Technology switch to the Multi position.
b. Set the Latch switch to the None position.
c. Set the Gate Ref switch to the Gnd position.
2.
Use the following tips and jumpers as required:
a. GLP extender cable (part 453605)1
b. SL T type probe tip (part 453826)1
c. SL T ground tip (use part 453826)1
d. 6/32 pin tip
e. Alligator tip
Probe Power
Connect probe power leads to power adapter board C1
as follows:
Black to C1 E1711 (-)
Other to C1 E1811
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Can be ordered from Mechanicsburg.
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1-96
Probe Test
Ground the probe at B1 D1 D08 on the planar board.
Probe B1 D1 B02 on the planar board. Both lights should
be on.
Probe Light Conditions
Two lights are used to indicate status. The 2 lights
indicate 4 conditions:
Condition Lights
Up Down
Up light on continuously
Down light on continuously
Pulsing
Invalid signal or no power
to the probe.
Probing EC1, EC2, and C1 A 1
On Off
Off On
On
1
On
1
Off Off
The connector caps have holes drilled through to the
probe points. Simply insert the probe into the
appropriate hole.
Cl A 1 ,P-EC1 ,P-EC2 Pin Locations
Plug
~-:::----:==!-
D13
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Cover
Top View
813
D02
B02
1
Both lights are on, 1 light is on continously while the other
light turns on and off, or both lights turn on and off .
• •