Dxdp Does Not Work - Panasonic KX-DT543-B Service Manual

KX-DT543/KX-DT543-B/KX-DT546/KX-DT546-B
8.4.

DXDP Does Not Work

Connect DPT to DXDP port.
Confirm the voltage at Pin 4 of Q332 (VDD33).
Is it about 3.3V?
YES
Confirm the voltage between TP:H-D and TP:L-D.
Is it between 15V and 40V?
YES
Confirm the waveform of receiving signals
from DPT connected to DXDP port.
Refer to the waveform (16).
YES
Confirm the waveform of transmitting signals
to DPT connected to DXDP port.
Refer to the waveform (17).
END
Check the soldering.
Resolder or replace parts as needed.
NO
Related parts: L221
Related parts: Q330,R345,R346,R347,C331,
NO
NO Related parts:
Related parts:
NO
28
C332,L303,L304,JK301,Q303,
Q304,R319,R320,C325,R321,
R322
C337,C333,R348,R349,D533,
R350-355,C335,C336
Q331,R340-343,D532,C330,
C331,Q332,R312,R313,C312,
C313,D533,R348,R349,C333,
C337