DOWNLOAD Panasonic KX-NT630RU-B Service Manual ↓ Size: 5.11 MB | Pages: 62 in PDF or view online for FREE

37

Refer to waveform (20) in  Waveform (P.51) .

Check the soldering.

  Resolder or replace parts as needed.

Does RINGER LED light?

Related parts: 

No

Yes

Related parts: 

No

Yes

Key LED light?

LCD Backlight LED light?
See the communication waveform(20)*.

No

END

Related parts: 

IC1001,Q1001,Q1002,LED cable
(Ringer PCB)
R6001,R6002,D6001,D6014

IC1001,R4040,R4037,C4091,Q4001,
R4038, LCD Module

IC1001,R6003-R6020,D6002-D6013 

Yes

*Please refer to 10.2 Assembly for Lead wire.

38

1. Tilt the Stand in the direction indicated and press the 

PUSH mark with both hands to remove the Stand.

2. Remove 8 Screws A.
3. Remove the Lower Cabinet.

4. Remove the LCD FFC from the Main PCB.
    Caution

      To stand the connector (

) and remove the LCD

      FFC(

).

5. Remove both Speaker Cords with the soldering iron.
6. Remove 7 Screws A.

Stand

 Lower Cabinet

PUSH

PUSH

 Lower Cabinet

A

A

A

A

A

A

A

A

Upper Cabinet

A

A

A

A

A

A

A

Upper Cabinet

 Main PCB

 LCD FFC

Connecter

Speaker Cords 
soldering

39

Pass the LEAD through the treatment ribs.

Place parallel leads on top  side of Speaker Lead.

Gray
Blue
Orange

Blue

Orange

5Pin

Blue

Orange

LED

Hook SW 

Head

 Set

Speaker

Soldering

Styling LEAD under the PCB.

40

Even if you do not have the special tools (for example, a spot heater) to remove the Flat IC, with some solder (large amount), a sol-
dering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.

• PbF (: Pb free) Solder
• Soldering Iron

Tip Temperature of 700°F ± 20°F (370°C ± 10°C)
Note: We recommend a 30 to 40 Watt soldering iron. An
expert may be able to use a 60 to 80 Watt iron where some-
one with less experience could overheat and damage the
PCB foil.

• Flux

Recommended Flux: Specific Gravity 

 0.82.

Type 

 RMA (lower residue, non-cleaning type)

Note: See About Lead Free Solder (PbF: Pb free) (P.6).

1. Put plenty of solder on the IC pins so that the pins can be

completely covered.
Note:

If the IC pins are not soldered enough, you may give
pressure to the P.C. board when cutting the pins with
a cutter.

2. Make a few cuts into the joint (between the IC and its

pins) first and then cut off the pins thoroughly.

3. While the solder melts, remove it together with the IC

pins.

When you attach a new IC to the board, remove all solder
left on the land with some tools like a soldering wire. If some
solder is left at the joint on the board, the new IC will not be
attached properly.

1. Tack the flat pack IC to the PCB by temporarily soldering

two diagonally opposite pins in the correct positions on
the PCB.

Be certain each pin is located over the correct pad on the PCB.

2. Apply flux to all of the pins on the IC.

3. Being careful to not unsolder the tack points, slide the sol-

dering iron along the tips of the pins while feeding enough
solder to the tip so that it flows under the pins as they are
heated.

1. Add a small amount of solder to the bridged pins.
2. With a hot iron, use a sweeping motion along the flat part

of the pin to draw the solder from between the adjacent
pads.