KV-S5055C (serv.man2) - Panasonic Other Service Manuals Service Manual (repair manual). Page 114

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2. Door Switch (Micro switch) does
    not work correctly.

1. Execute Key/Sensor in Sec. 9.3.6 to check 
    the door switch (Door Sensor) ON/OFF 
    condition.
2. Check the condition between the Door
    Switch and CN4006 on DRIVE Board.
3. Check the Door Switch mechanical 
    condition.
4. Replace a faulty cable.
5. Replace the Door Switch.

3. Monitor circuit to check the door
    ON/OFF condition is broken.

1. Execute Key/Sensor in Sec. 9.3.6 to check
    the door switch ON/OFF condition.
2. Check 24VIL signal line (CN4006-2nd pin)
3. Check DOOR signal (CN4002-34th)
      

→ +5 V (when the door is open)

             0 V (when the door is closed)
4. Replace a faulty cable.
5. Replace the DRIVE Board.
6. Replace the CONTROL Board.

F17 (SD-RAM error)

87

xx

00

00 Access error to SDRAM (IC0040 to 

IC0043) on the CONTROL Board

1. Check the soldering condition of the parts
    surrounding the ASIC (IC0035 and IC0038)
2. Check the soldering condition of the SDRAM
    (IC0040 to IC0043). 
3. Replace faulty parts or CONTROL Board.

F18 (Extension SD-
RAM error)

88

xx

00

00 Access error to an additional 

SDRAM attached to CN0017 and 
CN0018

1. Check whether the additional SDRAM is
    attached to CN0017 and CN0018, properly.
    Or reattached it.
2. Make sure that the optional SDRAM meets
    our recommended specifications.
    (See 4.5 for details.)
3. Check the soldering condition of the parts 
    surrounding the ASIC (IC0035 and IC0038) 
    on the CONTROL Board to repair it.
4. Check the soldering condition of the CN0017 
    and CN0018 (for the SDRAM) and its 
    surrounding circuit on the CONTROL 
    Board to repair it.
5. Replace faulty parts or CONTROL Board.

F31 (Analog IC error)

95

xx

00

00 Access error to Analogue IC

1. Check the following connection and 
    soldering condition to repair it.

a. CN5002 (CCD (F) Board) to CN1003 
    (CONTROL Board)
b. CN5002 (CCD (B) Board to CN1005 
    (CONTROL Board)
c. CN5003 (CCD (F) Board) to CN1004
    (CONTROL Board)
d. CN5003 (CCD (B) Board) to CN1006
    (CONTROL Board)
e. IC7 and IC8 (CCD (F) Board and
    CCD (B) Board) and their surround circuit.
f. IC0006 (CONTROL Board) and its 

       surround circuit.
2. Check the following signals during power-on.
    a. AFE_SDF (CN1004-12th pin): See Fig. 10.
    b. AFE_SDB (CN1006-12th pin): See Fig.10.
    c. 3.3 V (CN5003-9th pin on the CCD (F) 
        Board and the CCD (B) Board)
3. Replace faulty parts or boards.

F33 (USB IC error)

97

00

00

00 Access error to USB Controller

1. Check the soldering condition of the USB 
    Controller (IC0010) and its surrounding
    circuit on the CONTROL Board to repair it.
2. Check the soldering condition of CPU 
    (IC0006) on the CONTROL Board.
3. Replace faulty parts or CONTROL Board.

F34 (EEPROM error)

98

00

00

00 Access error to EEPROM

1. Check the soldering condition of the     
    EEPROM (IC0004) and its surrounding 
    circuit on the CONTROL Board.
2. Check the soldering condition of the CPU 
    (IC0006-89,90, and 100th pins) and their 
    surrounding circuit on the CONTROL Board.
3. Replace faulty parts or CONTROL Board.