e. Test procedure 59.
Test point 3 is to check the CX-13064/U for an
open or short (Figure 90).
Remove the CX-13064/U from the J-3513/U J6.
Measure continuity on CX-13064/U P2 pin D to P1 pin D, then P3
pin G to P1 pin M, then P3 pin E to P1 pin R.
If infinity is measured on any of these tests, the CX-13064/U is
bad (open).
If zero ohms is measured on all three tests, the cable is not
open.
To check for short, measure continuity on the CX-13064/U P1 pin J
to pins D, M, and R and P1 pin D to pins M and R.
If zero ohms is measured, the CX-13064/U is bad (shorted) (Figure
90).
If infinity is measured, tests at TP4 of Figure 91 are performed.
Figure 90.
RT MODULATION circuit, no voice sidetone (TP3).
103
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