KX-HDV20RU - Panasonic PBX Service Manual (repair manual). Page 15

15

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.

Related parts:R143-R152,Q118 -Q122,
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,

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,

LED111,LED113,LED103,LED115,LED112

BLUE :  Q110,Q109,R134,

LED123,LED124,LED128,LED132,LED134

Related parts:R143-R152,Q118 -Q122,
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.

Measure the voltage at Pin27 of IC103 and 
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)*.

Confirm the frequency of clock signal at 
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