Read Panasonic KX-DT521RU Service Manual Supplement online
14
2.4.
DXDP Does Not Work
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts: Q330,R345,R346,R347,C331,
C332,L303,L304,JK301,Q303,
Q304,R319,R320,C325,R321,
R322
Q304,R319,R320,C325,R321,
R322
NO
Connect DPT to DXDP port.
Related parts:
Related parts:
NO
YES
Confirm the waveform of transmitting signals
to DPT connected to DXDP port.
to DPT connected to DXDP port.
Refer to the waveform (17).
END
Confirm the voltage at Pin 4 of Q332 (VDD33).
Is it about 3.3V?
Is it about 3.3V?
NO
Related parts: L221
Confirm the voltage between TP:H-D and TP:L-D.
Is it between 15V and 40V?
Is it between 15V and 40V?
Confirm the waveform of receiving signals
from DPT connected to DXDP port.
from DPT connected to DXDP port.
Refer to the waveform (16).
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
C313,D533,R348,R349,C333,
C337
NO
YES
YES
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