85
KX-NCP500GR
12 Miscellaneous
12.1. How To Replace a Flat Package IC
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.
12.1.1. Preparation
• 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.5).
12.1.2. Removal Procedure
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.
12.1.3. Procedure
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.
12.1.4. Removing Solder From Between
Pins
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.
Summary of Contents for KX-NCP500GR
Page 9: ...9 KX NCP500GR ...
Page 12: ...12 KX NCP500GR 4 2 Power Supply Block Diagram ...
Page 20: ...20 KX NCP500GR 4 5 5 System Control 4 5 5 1 System Control Block Diagram ...
Page 21: ...21 KX NCP500GR 4 5 5 2 Voice TDM Highway Bus Block Diagram ...
Page 24: ...24 KX NCP500GR 4 5 6 2 EC Bus System Connection Diagram ...
Page 32: ...32 KX NCP500GR 5 Location of Controls and Components 5 1 Name and Locations ...
Page 36: ...36 KX NCP500GR ...
Page 53: ...53 KX NCP500GR 9 Troubleshooting Guide 9 1 IPCMPR Card 9 1 1 Startup ...
Page 54: ...54 KX NCP500GR ...
Page 55: ...55 KX NCP500GR ...
Page 56: ...56 KX NCP500GR ...
Page 57: ...57 KX NCP500GR 9 1 1 1 Main alarm light turns on ...
Page 58: ...58 KX NCP500GR 9 1 1 2 SD card access light does not flash ...
Page 60: ...60 KX NCP500GR ...
Page 61: ...61 KX NCP500GR 9 1 1 6 Option card cannot start up ...
Page 62: ...62 KX NCP500GR 9 1 2 Phone Call 9 1 2 1 The path cannot connect ...
Page 63: ...63 KX NCP500GR 9 1 2 2 Noise is created ...
Page 64: ...64 KX NCP500GR 9 1 3 Paging 9 1 3 1 Noise is created ...
Page 65: ...65 KX NCP500GR ...
Page 66: ...66 KX NCP500GR 9 1 4 Using MOH ...
Page 67: ...67 KX NCP500GR ...
Page 68: ...68 KX NCP500GR 9 1 5 LAN 9 1 5 1 LAN Connection ...
Page 69: ...69 KX NCP500GR 9 1 6 ESVM 9 1 6 1 ESVM function record play ...
Page 70: ...70 KX NCP500GR ...
Page 71: ...71 KX NCP500GR 9 1 7 RS 232C 9 1 7 1 RS 232C Connection ...
Page 72: ...72 KX NCP500GR 9 1 8 SD card IF ...
Page 73: ...73 KX NCP500GR 9 1 9 Other ...
Page 75: ...75 KX NCP500GR 9 2 1 1 Defective parts list ...
Page 78: ...78 KX NCP500GR 9 2 4 15VPT output voltage only not output 9 2 4 1 Defective parts list ...
Page 79: ...79 KX NCP500GR 9 2 5 41V output voltage only not output 9 2 5 1 Defective parts list ...
Page 80: ...80 KX NCP500GR 10 Service Fixture Tools 10 1 Extension Boards for Servicing ...
Page 87: ...87 KX NCP500GR 12 2 3 Power Supply Board ...
Page 129: ...129 KX NCP500GR Waveform 7 Waveform 8 Waveform 9 159 984MHz 13 824MHz 16 384MHz ...
Page 145: ...145 KX NCP500GR 16 2 Cabinet and Electrical Parts Location ...
Page 146: ...146 KX NCP500GR 16 3 Accessories and Packing Material ...