Panasonic KX-A405CE Service Manual ▷ View online
17
KX-A405CE
9.2.2.
Commands
See the table below for frequently used commands.
Command name
Function
Example
SFR
Command for checking X'tal clock frequency
• SFR
The current adjusted value is set to output "xx xx".
Furthermore, initial output to TP_CKM[IC501-57pin] is 13.824MHz
Furthermore, initial output to TP_CKM[IC501-57pin] is 13.824MHz
SFR_xx_xx
Command for adjustment of X'tal clock
• Set the adjustment value of "xxxx" to SFR.
(Default value "xxxx"="0100")
EPD_0
registration information
verification tone
initialization command
verification tone
initialization command
• Initialize standard EEPROM value of software for registration informa-
tion, verification tone, etc.
Confirm it is ok to delete CS registration information before executing.
Confirm it is ok to delete CS registration information before executing.
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KX-A405CE
9.3.
Adjustment Standard
When connecting the simulator equipment for checking, please refer to below.
9.3.1.
Bottom View
Note:
(*2) is referred to Power Supply Circuit (P.8)
A
PNLB1754Y -LV
JJ302
D372
IC301
ANT2
R371
SCV
R304
JJ371
C307
R307
R305
C310
C303
SW1
R301
R302
C309
C301
DCP
DCM
DC
RED
BLK
3.0A
F301
VBAT
URX
UTX
R654
R653
Q652
VREF
VCCA
+3.0V
C510
C530 GPIO26
VDDC
RA504
C513
C511
RA502
RTCK
TMS
TDI
TDO
TCK
RSTN
STM/CKM/P15
IC611
C512
C514
VBG
Q651
R652
R651
+6.5V
GND
D371
DCDC_OUT
PbF
C371
ANT1
DC
6.5V
Frequency Counter (*1)
Oscilloscope (*2)
* Send command "SFR", then
the frequency output on this TP.
* Start Monitor
Spectrum Analyzer
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KX-A405CE
9.4.
Clock adjustment after crystal replacement
If repairing or replacing X'tal, it is necessary to adjust the data in memory.
The set doesn't operate if it is not executed.
The set doesn't operate if it is not executed.
First, operate the PC setting according to The Setting Method of JIG (P.16).
Then adjust the data according to the following procedures.
Then adjust the data according to the following procedures.
9.5.
Frequency Table
Items
Required adjustment
X'tal (X501)
System clock
Clock adjustment data is in EEPROM, adjust the data again
after replacing x’tal.
1) Apply 6.5V between DCP ad DCM with DC power.
2) Input Command "sendchar sfr", then you can confirm the cur-
rent value.
3) Check X'tal Frequency.(13.824 MHz ± 100 Hz).
4) If the frequency is not 13.824 MHz ± 100 Hz, adjust the fre-
quency of CLK executing the command "sendchar sfr xx xx
(where xx is the value)" so that the reading of the frequency
counter is 13.824000 MHz ± 15 Hz.
after replacing x’tal.
1) Apply 6.5V between DCP ad DCM with DC power.
2) Input Command "sendchar sfr", then you can confirm the cur-
rent value.
3) Check X'tal Frequency.(13.824 MHz ± 100 Hz).
4) If the frequency is not 13.824 MHz ± 100 Hz, adjust the fre-
quency of CLK executing the command "sendchar sfr xx xx
(where xx is the value)" so that the reading of the frequency
counter is 13.824000 MHz ± 15 Hz.
Ch. (hex)
TX/RX Frequency (MHz)
Channel 0
00
1897.344
Channel 1
01
1895.616
Channel 2
02
1893.888
Channel 3
03
1892.160
Channel 4
04
1890.432
Channel 5
05
1888.704
Channel 6
06
1886.976
Channel 7
07
1885.248
Channel 8
08
1883.520
Channel 9
09
1881.792
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KX-A405CE
10 Miscellaneous
10.1. How to Replace the 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
soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
soldering iron and a cutter knife, you can easily remove the ICs that have more than 100 pins.
10.1.1. Preparation
• PbF (: Pb free) Solder
• Soldering Iron
• 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
someone with less experience could overheat and damage
the PCB foil.
expert may be able to use a 60 to 80 Watt iron where
someone 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.3)
10.1.2. How to Remove the IC
1. Put plenty of solder on the IC pins so that the pins can be
completely covered.
Note:
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.
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 board 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.
on the board 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.
10.1.3. How to Install the IC
1. Temporarily fix the FLAT PACKAGE IC, soldering the two
marked pins.
*Check the accuracy of the IC setting with the corresponding
soldering foil.
soldering foil.
2. Apply flux to all pins of the FLAT PACKAGE IC.
3. Solder the pins, sliding the soldering iron in the direction
of the arrow.
10.1.4. How to Remove a Solder Bridge
1. Lightly resolder the bridged portion.
2. Remove the remaining solder along the pins using a
2. Remove the remaining solder along the pins using a
soldering iron as shown in the figure below.
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