DOWNLOAD Panasonic KX-VC300CX / KX-VC600CX Service Manual ↓ Size: 5.4 MB | Pages: 127 in PDF or view online for FREE

37

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38

Internet

ONU

Camera

Display

Microphone

Router

ONU

Camera

Display

Microphone

Router

C4001

C4002

C4004

C4005

C4006

C4007

C4008

C4009

D952

C4010

R10526

R10527

C4016 C4017

C4018 C4019

C4023 C4024

L1001

C4027

L1004

Z1001

Z1002

Z1003

Z1004

Z1005

Z1006

Z1007

Z1008

C4033

C3

0

Z1011

C213

C218

L1404

R4

0

L14

R4

0

C4054

C4055

C4056

Z951

Z953

Z954

Z955

Z956

Z957

Z958

Z960

Z962

Z963

Z964

IC203

IC204

L501

IC207

L503

L504

L505

CL951

CL952

CL953

CL954

C1001

C1003

C1004

C1005

C1006

C1008

C1009

C1012

C1017

C1019

R112

C1020

C1021

C1022

R501 R502

R503

R504

R508

IC1002

C1036

C1037

C1038

C1039

C1040

R1401

L951

R1019

C1041

R1402

L953

R1020

FL951

C111

C112

C113

C117

C118

R540

C504

C505

R541

R542

R543

C508

R545

C1452

R547 R548

C510

C512

C513

C514

C515

R551

R552

F1401

C910

C10510

C10511

FL1005

FL1006

CN1001

R961

R963

R966

R967

R968

D501

L4051

D502

L4052

D503

L4053

D504

D505

D506

D507 D508

C951

C952

IC103

C953

IC105

IC106

D10502

IC107

C957

D10504

C959

D10506

D10507

X951

C962

C963

C964

C965

C966

C967

C968

L2

C97

0

D

C972

C973

C974

C975

C976

C977 C978 C979

IC901

IC903

IC951

R10504

R10505

R10506

R10507

R209

5

8

4

1

5

8

4

1

7

1

14

8

1

7

8

2

14

13

12

9

102

39

103

128 1

64

38

65

5

1

6

11

15

10

CN501

1

17

4

4

1

3.0A

4

1

6

5

5

8

4

1

5

8

4

1

7

1

14

8

7

1

14

8

90

61

60

31

30

1

120

91

6

4

1

3

K

L

39

Digital microphone may be damaged. Connect a 
working one and check if sound is available. If it is, 
perform procedures shown in Measures column.

See Digital Microphone Troubleshooting.

Digital microphone cable may be damaged. Check 
conductivity. If the cable is disconnected, perform 
procedures shown in Measures column.

Replace or repair cables.

Cable may be disconnected from the main unit. 
Check visually. If the cable is disconnected, perform 
procedures shown in Measures column.

Insert the cable to CN1402 on the main board 
(PNLB1845ZB).

Cable from the main unit may be damaged. Check 
conductivity.
If the cable is damaged, perform procedures shown 
in Measures column.

Replace or repair cables.

Cable may be disconnected at sub board 
(PNLB1846ZA-A) or/and HS board (PNLB1846ZA-
C). Check visually. If the cable is disconnected, per-
form procedures shown in Measures column.

Insert the cable to CN11 on the sub board 
(PNLB1846ZA-A), or CN303 on the HS board 
(PNLB1846ZA-C).

Execute "GET_HS_STAT" command in DIAG Mode. 
(-Refer to “8.11 DIAG Operation”
  -Audio part Connection Diagram : No1)
-  "00" appears when HS_SP/MIC cable is not 

inserted into the jack.

-  "10" appears when HS_MIC cable is inserted into 

the jack.

- "01" appears when HS_SP cable is inserted into the 

jack.

- "11" appears when HS_SP/MIC cable is inserted 

into the jack.

If "11"appears all the time, cable may be discon-
nected. Check again. If the cable is disconnected, 
perform procedures shown in Measures column.

Insert the cable to CN11 on the sub board 
(PNLB1846ZA-A), or CN303 on the HS board 
(PNLB1846ZA-C).

If the above does not apply, signal error related to
HSout_STAT or HS_STAT may have occurred.

[HSout_STAT line]
Check signal changes at specific points on sub board
(PNLB1846ZA-A) by inserting and removing headset
SP terminal.

- Pin 4 of CN11: If the voltage is not 3 V or higher 

when HS_SP cable is inserted and if the voltage is 
not 0.5 V or less when the cable is not inserted, 
check solder joints at HS board,  CN11 and Q5 . If 
any defective solder joints are discovered, perform 
procedures a) shown in Measures column.

a) Resolder connector pins.

If failure continues, perform procedures b) shown in 
Measures column.

b) Replace parts C68 and Q5.

- E of Q5: If the voltage is not 0.8 V or less when 

HS_SP cable is inserted and if the voltage is not 3 
V or more when the cable is not inserted, check sol-
der joints at pin 2 on IC24, Q5, and R71. If any 
defective solder joints are discovered, perform pro-
cedures a) shown in Measures column. If failure 
continues, perform procedures c) shown in Mea-
sures column.

c) Replace parts Q5, R71, and others.

40

- E of Q16: If the voltage is not 3 V or more when 

HS_SP cable is inserted and if the voltage is not 
0.8 V or less when the cable is not inserted, check 
solder joints at Q16 to pin 7 on CN3. If any defec-
tive solder joints are discovered, perform proce-
dures a) shown in Measures column. If failure 
continues, perform procedures d) shown in Mea-
sures column.

d) Replace part Q16, check the pin 124 of IC121 on 

the main board.

[HS_STAT line]
Check signal changes at specific points on sub board 
(PNLB1846ZA-A) by inserting and removing headset 
MIC terminal.

- Pin 5 of CN11: If the voltage is not 3 V or more 

when HS_MIC cable is inserted into the jack and if 
the voltage is not 0.5 V or less when the cable is 
not inserted, check solder joints at HS board,  CN11 
and Q1. If any defective solder joints are discov-
ered, perform procedures a) shown in Measures 
column.

If failure continues, perform procedures e) shown in 
Measures column.

e) Replace parts C22 and Q1.

- E of Q1: If the voltage is not 0.8 V or less when 

HS_MIC cable is inserted and if the voltage is not 3 
V or more when the cable is not inserted, check sol-
der joints at IC15 and 16, Q1, and R27. If any 
defective solder joints are discovered, perform pro-
cedures a) shown in Measures column. If failure 
continues, perform procedures f) shown in Mea-
sures column.

f) Replace parts Q1, R27 and others.

- E of Q15: If the voltage is not 3 V or more when 

HS_MIC cable is inserted and if the voltage is not 
0.8 V or less when the cable is not inserted, check 
solder joints at Q15 to pin 2 on CN3. If any defec-
tive solder joints are discovered, perform proce-
dures a) shown in Measures column. If failure 
continues, perform procedures g) shown in Mea-
sures column.

g) Replace part Q15, check the pin 123 of IC121 on 

the main board.

Check power and clock on main board 
(PNLB1845ZB). Refer to (8.10. Power/clock Failure).

Refer to (8.10. Power/clock Failure).

[Confirming the operation of IC301 : When monitored 
on an oscilloscope]
Check if pulse period of main board (TP305) is 
approximately 20.8[us].
When the monitored values deviate significantly from 
the ones shown above, there may be errors in IC301 
(Refer to the figure below . ) 
perform procedures shown in Measures column

Replace main board (PNLB1845ZB).

TP305:TRIG

TP304:SYDET

D-MIC

：20.8[us]