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Overview
T
C
EST
ARD
Test points on the HTC-439
card-edge connector pin including Frame Ground. These test points are
identified by the pin number to which they connect.
•
The four-position test slider switch (S1) selects which test (Open, Short,
Loop Thru, or Loop Back) is to be performed on CO and field circuits.
•
The Open switch position effectively provides a splitting-type access to
one pair of the CO and field sides and the 210 jacks.
•
The Loop Back or Loop Thru switch positions allow you to use the two
miniature 210 jacks located within the J1 block.
All tests are run on both Side 1 and Side 2. Refer to
page 3
for further information.
Test points
TP6
TP4
T
CO
FIELD
OPEN
SIDE 1
SHORT
R
LOOP THRU
LOOP BACK
TP5
TP3
TP9
TP12
T
CO
FIELD
SIDE 2
R
TP1
TP8
TP11
CO
SIDE 1
FIELD
SIDE 2
Miniature
210 jacks
2
(Figure
S1 switch
positions
S1 switch
Figure 1. HTC-439 List 2 Test Card
November 12, 1999
1) provide access to each active
"Testing a Circuit" on
Circuit schematic
150-439-102-02, Issue 2
Connector pins
HTC-439 List 2
1
12
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