DOWNLOAD Panasonic KX-NS5180X-SX / KX-NS5180XSX Service Manual ↓ Size: 2.98 MB | Pages: 41 in PDF or view online for FREE

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NO

NO

OK

NG

NG

END

END

END

NO

NG

NG

Cannot be called.

When the calling path 

is continuing, is the voltage of 

EXT. line between T-R

 less than or equal to 24V?

Can DTMF send out?

Check the 

operation amplifier

of IC102A-E.

Replace the

 NG parts of IC102A-E.

Check DSP 

IC101A-E.

Replace the

 DSP IC101A-E.

The dial tone can be 

heard from the station.

Check the 

operation amplifier

of IC102A-E.

Replace the

 NG parts of IC102A-E.

Check DSP 

IC101A-E.

Replace the DSP 

IC101A-E.

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NG

all ports

OK

OK

Caller ID is not detected

by optional equipment

END

Dose this occur in a specific 

ports or all ports 

specific ports

Another Case.

Check soldering of terminal of 

IC101A-E and the peripheral parts. 

Resolder DSP IC101A-E.

Check the test 

land between [TP_13.824MHz] 

and [DG] 13.824MHz?

NG

Check  X100,R132,IC104,R137.

NG

Replace the 

defective parts.

OK

Replace the DSP IC101A-E.

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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.4).

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.

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