f. Test procedure 60.
Test point 4 is to check the CX-13061/U for an
open or short (Figure 91).
Remove the RT from the MT-1029.
Remove the CX-13061/U from the J-3513/U J3 and measure continuity
from P2 pin E to P1 pin K and P2 pin D to P1 pin R.
If either measurement is infinity, the CX-13061/U is bad (open).
If zero ohms is measured on both circuits, then measure for a
short at P2 pin E to P2 pins D and to shield.
If either measurement is zero ohms, the CX-13061/U cable is bad
If infinity is measured, the J-3513/U is bad.
RT MODULATION circuit, no voice sidetone (TP4).