Panasonic KX-DT543RU / KX-DT546RU Service Manual ▷ View online
25
KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
Table-4 : ASIC2(IC150) Data Error
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts:
[Main PCB] CN400
[Ope PCB] CN160,D160,C160,C161,C154
[Ope PCB] CN160,D160,C160,C161,C154
C156
Flat Cable (Between Main PCB and Ope PCB)
NO
Confirm the voltage at Pin 3 of IC150 (Ope PCB).
Is it about 3.3V?
Is it about 3.3V?
Related parts:
[Ope PCB] L150,C150,C152,C153
NO
YES
Confirm the voltage at Pin 19 and Pin 36 of
IC150 (Ope PCB).
Is it about 3.3V?
YES
Related parts:
[Main PCB] CN400,IC300,R334
[Ope PCB] CN160,R151
[Ope PCB] CN160,R151
Flat Cable (Between Main PCB and Ope PCB)
NO
YES
Confirm the frequency of clock signal at Pin 1 of
IC150 (Ope PCB). Is it 2MHz?
IC150 (Ope PCB). Is it 2MHz?
Refer to the waveform (5).
Related parts:
[Main PCB] CN400,IC300,IC410,R424,
R455,R456,R443,R442,
R334,R433,R452,R453,R454
R334,R433,R452,R453,R454
[Ope PCB] CN160,IC150,L150,R151
Flat Cable (Between Main PCB and Ope PCB)
NO
YES
Confirm the waveform of communication
between IC150 (Ope PCB) and IC410 (Main PCB).
between IC150 (Ope PCB) and IC410 (Main PCB).
Refer to the waveform (6),(7).
END
Related parts: [Main PCB]
X301,R323,R324,C382,C383
Confirm the frequency of clock signal at Pin 39 of
IC300 (Main PCB). Is it 16.384MHz?
IC300 (Main PCB). Is it 16.384MHz?
Refer to the waveform (4).
YES
NO
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KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
8.2.
ASIC1(IC300) Does Not Operate
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts: C323,C327,C324,C328,C326,
C329, L222
NO
Confirm the voltage at Pin19,30 and 43 of
IC300 (VCC33).
Is it about 3.3V?
Related parts: X301,R323,R324,C382,C383
NO
Confirm the frequency of clock signal at Pin 39 of
IC300. Is it 16.384MHz?
IC300. Is it 16.384MHz?
Refer to the waveform (4).
YES
Related parts: IC300,IC410,R333,R438,R439,
R440
NO
YES
Confirm the waveform of communication(SPI2)
between IC300 and IC410.
between IC300 and IC410.
Refer to the waveform (9).
YES
Related parts: IC410,R423,C362
NO
YES
Confirm the waveform of reset signal at Pin1 of
IC300.
Refer to the waveform (8).
Related parts: IC300,IC410,R330,R331,
R332,R416,R441
NO
YES
Confirm the waveform of communication(PCM)
between IC300 and IC410.
between IC300 and IC410.
Refer to the waveform (10).
Related parts: T300,C309,C302,C303,
R301,R306-311,C310,C311
NO
YES
Confirm the waveform of receiving signals
from PBX.
from PBX.
Refer to the waveform (11).
Related parts: T300,D301,Q302,C309,
R301-305, C302-308
NO
YES
Confirm the waveform of transmitting signals
to PBX.
to PBX.
Refer to the waveform (12).
END
27
KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
8.3.
LCD Does Not Operate
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts: CN460,D460,C460-462,C464
NO
YES
Confirm the voltage at Pin7 of CN460.
Is it about 3.3V?
Is it about 3.3V?
Related parts:C465,C466,C467
Related parts: L460,R435
NO
NO
Confirm the voltage between Pin 12 and Pin 13 of
CN460.
Is it about following voltage?
CN460.
Is it about following voltage?
Note)
"LCD contrast" must be default setting (Level 3).
"LCD contrast" must be default setting (Level 3).
YES
Related parts:CN460,R430-432,R434,R436,R437
NO
YES
Confirm the waveform SCLK at TP:SPI_CLK.
Refer to the waveform (13).
Related parts:LCD module,CN460
NO
YES
Confirm the waveform at Pin 3, 4, 5 and 6 of CN460.
Refer to the waveform (14),(15).
YES
END
Confirm the LCD display.
Is it working?
Is it working?
[DT546]:13.8V / [DT543]:10.0V
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KX-DT543RU/KX-DT543RU-B/KX-DT546RU/KX-DT546RU-B
8.4.
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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