Panasonic KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT Service Manual ▷ View online
15 ADJUSTMENTS (CORDLESS HANDSET)
If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
Symptom
Remedy*
The movement of Battery Low indicator is wrong.
Make adjustments in item (A)~(D), (G), (H).
The cordless handset does not respond to a call from base unit.
Make adjustments in item (A)~(D), (I)~(P).
The cordless handset does not transmit or the transmit frequency is off.
Make adjustments in item (A)~(D), (I)~(L), (M), (O).
The transmit frequency is off.
Make adjustments in item (A)~(D), (I)~(L), (M), (O).
The transmit power output is low, and the operating distance between base unit and
cordless handset is less than normal.
cordless handset is less than normal.
Make confirmation in item (J), (N).
The reception sensitivity of base unit is low with noise.
Make confirmation in item (N).
Does not link between base unit and cordless handset.
Make adjustments in item (A)~(D), (I)~(P).
The Audio level is high or low.
Make confirmation in item (R).
The SP-Phone level is high or low.
Make confirmation in item (S).
The cordless Headset level is high or low.
Make confirmation in item (T).
* : Refer to Adjustment (Cordless Handset) (P.73)
15.1. Adjustment (Cordless Handset)
Please follow the items below when BBIC or EEPROM is replaced.
Items
Adjustment Point
Procedure
Check or
Replace Parts
(A)*
1.8V Supply
Confirmation
TP12
1.
Confirm that the voltage between test point “TP12” and GND is 1.8V ± 0.02V.
2.
Adjust the 1.8V voltage of TP12 executing command “bandgap XX“ (XX is the
value).
value).
IC1, Q2, C40,
R4
(B)
4.0V Supply
Confirmation
TP10
1.
Confirm that the voltage between “TP10” and GND is 3.85V ± 0.2V.
IC1, F1, C1,
C2, C3, C57,
C74,
R1, R2, R3,
Q1, D1, L1,
R57
(C)
2.7V Supply
Confirmation
TP11
1.
Confirm that the voltage between “TP11” and GND is 2.7V ± 0.1V.
IC1, Q3, C4,
C5, R9, R10,
R11
(D)* BBIC Confirmation
-
1.
BBIC Confirmation (Execute the command "getchk").
2.
Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC1, X1, C7
(E)
Charge Control
Check & Charge
Current Monitor
Confirmation
-
1.
Apply 6V between J3(+) and J4(-) with current limit of PSU to 200mA.
2.
Confirm that the charge current is ON/OFF.
3.
SW to decrease current limit of PSU to 100mA.
4.
Confirm that the charge current is stable.
IC1, Q4, Q5,
Q9,
D6, D7, L4,
L5,
C73, C74, R5,
R6, R7, R72,
F1
(F)*
Charge Detection
(OFF) Confirmation
-
1.
Stop supplying 6V to J3(+) and J4(-).
2.
Execute the command "charge".
3.
Confirm that the returned value is 0x01 (hex).
IC1, Q4, Q5,
Q9,
D6, D7, L4,
L5,
C73, C74, R5,
R6, R7, R72,
F1
(G)*
Battery Monitor
Confirmation &
Adjustment
-
1.
Apply 2.3V ± 0.005V between BATT(+) and BATT(-).
2.
Execute the command "Backloff", then “readbatt“.
3.
Confirm: 29
returned value
36 (Hex)
(If the returned value is within the range, no need to do step 4.)
4.
If the reading is out of range in step 3 above, adjust the battery monitor
excuting command “wreeprom 00 01 01 XX”. (XX is the reading at step 3.)
excuting command “wreeprom 00 01 01 XX”. (XX is the reading at step 3.)
Then excute command “wreeprom 00 36 01 YY”. (YY can be confirmed by
the following calculation; YY= XX - 0E)
the following calculation; YY= XX - 0E)
IC1,F1,
C74,C2,
C3,R81,R24,
R73,C9
(H)
Battery low
Confirmation
-
1.
Apply 2.40V between BATT(+) and BATT(-).
2.
Confirm that there is no flashing of Battery Icon.
3.
Apply 2.20V between BATT(+) and BATT(-).
4.
Confirm that there is flashing of Battery Icon.
IC1, F1, C74,
C2,
C3, R81, R24,
R73, C9
73
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
Items
Adjustment Point
Procedure
Check or
Replace Parts
(I)*
BBIC Clock
Adjusment
CLK
1.
Execute the command "conttx".
2.
Input Command “rdeeprom 00 57 01”, then you can confirm the current value.
3.
Adjust the frequency of CLK executing the command "setfreq xx (where xx is
the value)" so that the reading of the frequency counter is 10.368000 MHz ±
10Hz.
the value)" so that the reading of the frequency counter is 10.368000 MHz ±
10Hz.
Note:
CLK is displayed only for a few seconds when executing command “conttx“ after
the battery is inserted.
CLK is displayed only for a few seconds when executing command “conttx“ after
the battery is inserted.
IC1, X1, IC3,
C7, L2, C54
(J)*
Transmitted Power
Confirmation
-
Remove the Antenna before starting step from 1 to 4.
1.
1.
Configure the DECT tester (CMD60) as follows;
<Setting>
•
•
•
•
Test mode: PP
•
•
•
•
RFPI: 01020304 08
•
•
•
•
Traffic Carrier: 5
•
•
•
•
Traffic Slot: 4
•
•
•
•
Mode: Loopback
•
•
•
•
RF LEVEL = -70dBm
2.
Execute the command "regcmd60 01 02 03 04 08".
3.
Initiate connection from DECT tester.
4.
Confirm that the NTP value at A201 (TP15) is 20dBm ~ 25dBm.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(K)*
Modulatoin Check
and Adjusment
-
Follow steps 1 to 3 of (J) above.
4.Confirm that the B-Field Modulation is 360kHz/div ~ 380kHz/div using data
type Fig 31.
type Fig 31.
5.Adjust the B-Field Modulation if required. (Execute the command
"Readmod" and "wrtmod xx", where xx is the value.)
"Readmod" and "wrtmod xx", where xx is the value.)
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(L)
Frequency Offset
Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Confirm that the frequency Offset is -50kHz ~ +50kHz.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(M)
Frequency Drift
Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Confirm that the frequency Drift is < ± 30kHz/ms.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(N) Sensitivity Receiver
Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Set DECT tester power to -88dBm.
5.Confirm that the BER is < 1000ppm.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
74
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
Items
Adjustment Point
Procedure
Check or
Replace Parts
(O) Timing Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Confirm that the Timing accuracy is < ± 0.5ppm.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(P)*
RSSI Level
Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Set DECT tester power to -81dBm.
5.Execute the command “readrssi“.
6.Confirm that the returned value is 0x09 (hex) ~ 0x19 (hex).
7.Set DECT tester power to -63dBm.
8.Execute the command “readrssi“.
9.Confirm that the returned value is 0x16 (hex) ~ 0x26 (hex).
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(Q)
Power RAMP
Confirmation
-
Follow steps 1 to 3 of (J) above.
4.Confirm that Power RAMP is matching.
IC1, IC3, L2,
C54, C60,
C61,
C62, C63,
C64,
C65, C66,
C67,
C69, C81,
C82,
C56, R58,
R55, R76
(R)
Audio Check and
confirmation
-
1.
Link to BASE which is connected to Line Simulator.
2.
Set line voltage to 48V and line current to 40mA.
3.
Input -45dBm/1KHz to MIC and measure Line output level.
4.
Confirm that the level is -10dBm ± 5dB and confirm that the distortion level is
< 5% at TEL Line (600
< 5% at TEL Line (600
Ω
Road).
5.
Input -20dBm/1KHz to Line I/F and measure Receiving level at REV1 and
REV2.
REV2.
6.
Confirm that the level is -23dBm ± 5dB and confirm that the distortion level is
< 5% at Receiver (Volume Middle, 150
< 5% at Receiver (Volume Middle, 150
Ω
Road).
IC1, IC2, C68,
C37, C90,
C91,
R25, R26,
C12,
C87, C10,
R29,
C89, C17,
R37,
R38, R80,
C92,
C13, R35,
C15,
C16, D8, C86,
C75, C77,
C38,
C80, R74, R36
(S)
SP phone Audio
check and
confirmation
-
1.
Link to Base which is connected to Line Simulator.
2.
Set line voltage to 48V and line current to 40mA.
3.
Set the handset off-hook using SP-Phone key.
4.
Input -45dBm/1KHz to MIC and measure Line output level.
5.
Confirm that the level is -6dBm ± 1.5dB and confirm that the distortion level is
< 5% at TEL Line (600
< 5% at TEL Line (600
Ω
Road).
6.
Input -20dBm/1KHz to Line I/F and measure Receiving level at SP1 and SP2.
7.
Confirm that the level is -6.5dBm ± 1.5dB and confirm that the distortion level
is < 5% at Receiver (Volume Middle, 150
is < 5% at Receiver (Volume Middle, 150
Ω
Road).
IC1, IC2, C68,
C37, C90,
C91,
R25, R26,
C12,
C87, C10,
R29, C89,
C17, R37,
R38, R80,
R29, C89,
C17, R37,
R38, R80,
C92,
C13, R35,
C15,
C16, D8, C86,
C75, C77,
C38,
C80, R74, R36
(T)
Headset Audio
check and
confirmation
-
1.
Link to BASE which is connected to Line Simulator.
2.
Set line voltage to 48V and line current to 40mA.
3.
Input -45dBm/1kHz across Mic terminals on headset cable.
4.
Confirm that the level is -14dBm ± 1.5dB and confirm that the distortion level
is < 5% at TEL Line (600
is < 5% at TEL Line (600
Ω
Road).
5.
Input -20dBm/1kHz to Line I/F.
6.
Confirm that the level is -25dBm ± 1.5dB and confirm that the distortion level
is < 5% at Receiver (Volume Middle, 150
is < 5% at Receiver (Volume Middle, 150
Ω
Road).
(SP terminals on headset cable is load of 150
Ω
)
IC1, IC2, CN4,
R50, R71,
R75,
C42, D4, D5,
R29, R25
75
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
Items
Adjustment Point
Procedure
Check or
Replace Parts
(U)*
EEP-ROM
confirmation
-
1.
EEP-ROM Confirmation (Execute the command “Chk154RURv02.bat“).
2.
Confirm the returned check sum Value (check sum is 79ED).
IC10, IC1,
R39, R40
Note:
After the measuring, sock up the solder of TP.
* : PC Setting (P.65) is required beforehand.
The connection of adjustment equipment are as shown in Adjustment Standard (Cordless Handset) (P.77).
76
KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT
Click on the first or last page to see other KX-TCD540RUM / KX-TCA154RUM / KX-TCD540RUT / KX-TCA154RUT service manuals if exist.