Panasonic KX-HDV20RU Service Manual ▷ View online
13
KX-HDV20 Series
8 Troubleshooting Guide
8.1.
No Operation
8.1.1.
Power ON Error
Note:
Refer to waveform(1),(2),(3) in Waveform (P.22)
Yes
Yes
END
Measure the voltage at TP_1.2V.
Is it 1.2V?
Is it 1.2V?
Yes
Related parts: IC101,L105,C154,C103
No
Related parts: JK101, F101,L103,L104,
HDV20 cable
See 6.2. LCD Does Not Operate.
Confirm the LCD Display and Backlight.
Is it working?
Is it working?
Measure the voltage at Pin 1 of JK101.
Is it about 12V?
Is it about 12V?
Related parts: C219,C220,R203,C203,C252,
C214,IC201,R202,C239,L203,
R210,R207,C212,C216,C214,
C218,R212,
R210,R207,C212,C216,C214,
C218,R212,
Measure the voltage
at TP_5V.
Is it 5V?
Measure the voltage at TP_3.3V.
Is it 3.3V?
Is it 3.3V?
Related parts: C221,C222,R204,C202,C225,
R213,IC202,R201,L202,C232,
R208,R209,C213,C215,C217,
C240,R211
R213,IC202,R201,L202,C232,
R208,R209,C213,C215,C217,
C240,R211
No
No
No
No
No
No
Measure the voltage at 1.8V.
Is it 1.8V?
Is it 1.8V?
Yes
Yes
Related parts: IC101,C116,C113
No
Confirm the waveform of reset signal at RSTN.
See the waveform(1)*.
See the waveform(1)*.
Yes
Related parts: JK101,D106,C162,Q123,R206,
R205,C210,C129,IC104,C152,
R116,R110,C104,IC101
R116,R110,C104,IC101
No
Confirm the frequency of clock signal at
Pin 46 of IC101.Is it 13.824MHz?
See the waveform(2)*.
Pin 46 of IC101.Is it 13.824MHz?
See the waveform(2)*.
Yes
Related parts: IC101,C131,C132,X101,R104,
R111
No
Confirm the waveform of Flash data.
See the communication waveform(3)*.
See the communication waveform(3)*.
Yes
Related parts: IC101,IC102,L113,C123,R115,
R113,R139,R140,R141,R142
No
Yes
No
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
14
KX-HDV20 Series
8.2.
LCD Does Not Operate
Note:
Refer to waveform(4) in Waveform (P.22)
Yes
END
Yes
Related parts: CN101,L106,C146
Measure the voltage at Pin8 of CN101.
Is it 3.3V?
Is it 3.3V?
Related parts: R158,C147,C148,C149,C150
Measure the voltage at Pin15 of CN101.
Is it about 16V?
Is it about 16V?
Related parts: C128,C163,C164,C166,C167
L110,L204,R162,R161
L110,L204,R162,R161
No
No
No
No
No
No
Confim the LCD display.
Is it working?
Is it working?
Yes
Yes
Related parts: CN101,LCD Module.
No
Yes
Confim the LCD backlight.
Is it working?
Is it working?
Related parts: IC101,R137,C165,R138,Q101
C112,L114
(Self-Backlight PCB)
D625-D628,R625-R628
C112,L114
(Self-Backlight PCB)
D625-D628,R625-R628
No
Confirm the waveform Pin 1,2,4,5 of CN102.
See the communication waveform(4)*.
See the communication waveform(4)*.
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
15
KX-HDV20 Series
8.3.
LED Does Not Light
8.4.
HDV20(Upper or Lower) Communication Error
Note:
Refer to waveform (5),(6),(7) in Waveform (P.22)
Yes
END
Yes
No
No
No
No
No
No
Yes
Yes
No
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Related parts:R143-R152,Q118 -Q122,
RED : Q114,Q107,R132,
RED : Q114,Q107,R132,
LED117,LED106,LED114,LED102,LED107
BLUE : Q117,Q108,R128,
LED122,LED125,LED130,LED135,LED137
Self-Label LEDs(FF1 - FF5) light?
Self-Label LEDs(FF6 - FF10) light?
Related parts:R143-R152,Q118 -Q122,
RED : Q116,Q103,R133,
RED : Q116,Q103,R133,
LED118,LED104,LED120,LED108,LED110
BLUE : Q111,Q102,R130,
LED140,LED121,LED139,LED127,LED136
Self-Label LEDs(F11 - FF15) light?
Related parts:R143-R152,Q118 -Q122,
RED : Q113,Q106,R131,
RED : Q113,Q106,R131,
LED111,LED113,LED103,LED115,LED112
BLUE : Q110,Q109,R134,
LED123,LED124,LED128,LED132,LED134
Related parts:R143-R152,Q118 -Q122,
RED : Q115,Q104,R129,
RED : Q115,Q104,R129,
LED119,LED116,LED109,LED101,LED105
BLUE : Q112,Q105,R135,
LED131,LED138,LED126,LED129,LED133
Self-Label LEDs(F16 - FF20) light?
Yes
END
Yes
No
No
No
No
Yes
No
Check the soldering.
Resolder or replace parts as needed.
Resolder or replace parts as needed.
Measure the voltage at Pin27 of IC103 and
Pin96 of IC101.Is it about 3.0V?
Pin96 of IC101.Is it about 3.0V?
Related parts:JK101,R156,D107,C134,R120,
C130,IC103,IC101
Confirm the wavefarm Pin1,2(for
IC101) ,Pin3,4(for Lower) Pin30,31(for Upper)
of IC103.
Is It USB Full-Speed communication?
See the communicatin waveform(6),(7)*.
IC101) ,Pin3,4(for Lower) Pin30,31(for Upper)
of IC103.
Is It USB Full-Speed communication?
See the communicatin waveform(6),(7)*.
Confirm the frequency of clock signal at
Pin 33 of IC103. Is it 24MHz?
See the waveform(5)*.
Pin 33 of IC103. Is it 24MHz?
See the waveform(5)*.
Related parts:IC103,C136,C137,X102,R154,R155
Related parts:IC101,IC103,R101,R102,
D112,D113,D114,D115,R106,R107,
L102,D102,D104,D108,R157,JK102,
D110,D111,D116,D117,R105,R108,
L101,D101,D103,JK101
D110,D111,D116,D117,R105,R108,
L101,D101,D103,JK101
16
KX-HDV20 Series
9 Disassembly and Assembly Instructions
9.1.
Remove Main Board
1. Remove 1 Screw (A).
2. Push direction to asemble Connect Cover.
2. Push direction to asemble Connect Cover.
3. Remove 5 Screws (B) and remove the Lower Cabinet.
4. Remove Flat Cable and Main Board.
(A)
Connect Cover
Lower Cabinet
(B)
(B)
(B)
(B)
(B)
Lower Cabinet
Upper Cabinet
Upper Cabinet
Main Board
Flat Cable
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