Panasonic KX-TCD450 Series

15 ADJUSTMENTS (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 confirmation in item (A), (B), (E), (F)
The handset does not respond to a call from base unit. Make adjustments in item (A), (B), (G), (I)~(M)
The handset does not transmit or the transmit frequency is off. Make adjustments in item (A), (B), (G)~(J), (L)
The transmit frequency is off. Make confirmation in item (A), (B), (G)~(J), (L)
The transmit power output is low, and the operating distance between base unit and handset is
less than normal.
Make confirmation in item (H), (K)
The reception sensitivity of base unit is low with noise. Make confirmation in item (K)
Does not link between base unit and handset. Make confirmation in item (A), (B), (G)~(M)
The reception level is high or low. Make adjustments in item (N)
The transmit level is high or low. Make adjustments in item (O)
*:RefertoAdjustment (P.51)
15.1. Adjustment
Please follow the items below when BBIC or EEPROM or FLASH ROM are replaced.
Items Adjustment
Point
Procedure Check or
Replace Parts
(A) 4.0V Supply
Confirmation
- 1. Confirm that the consumption current is < 200mA , that is, there is no short
circuit.
2. Confirm that the voltage between test point “+4V” and GND is 4.1V ± 0.2V.
IC1,F1,R14,
R15,C53,C1,
L1,D16,C4,
C5,C9,Q3,
R11,R16,R12,
C11,X1,C6,
C7,C70,IC10,
C401,C402,
C403,IC4,
C405,C408,
C409,C65,
C12,D20
(B) 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,C6,
C7,C70
(C) Charge Control Check &
Charge Current Monitor
Confirmation
- 1. Apply 6V between TP5(+) and TP6(-) 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,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
(D)* Charge Detection (OFF)
Confirmation
- 1. Stop supplying 6V to TP5(+) and TP6(-).
2. Execute the command "charge".
3. Confirm that the returned value is 0x00 (hex).
IC1,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
(E)* Battery Monitor
Confirmation
- 1. Apply 2.3V ± 0.005V between TP3(+) and TP4(-).
2. Execute the command "readbatt".
3. Confirm:
95 < returned value < A0 (Hex)
4. Execute the command "WRTBAT2 XX".
IC1,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
(F) Battery low Confirmation - 1. Apply 2.40V between TP3(+) and TP4(-).
2. Confirm that there is no Speaker sound (Battery low alarm).
3. Apply 2.20V between TP3(+) and TP4(-).
4. Confirm that there is Speaker sound (Battery low alarm).
IC1,F1,R14,
R15,R12,C11,
C1,C53,IC4,
R2,R17,R18,
R31,C8,C10,
C23,C24,C36,
C66,C67,C68,
D19
(G)* BBIC Clock Adjusment MCLK 1. Execute the command "conttx".
2. Adjust the frequency of MCLK executing thecommand "setfreq 00 xx (where xx
is the value)" so that the reading of the frequency counter is 10.368000MHz ±
3MHz.
IC1,X1,C6,
C7,C70,IC10,
L5,C111
51
KX-TCD450RUM / KX-A145RUM / KX-TCD450RUT / KX-A145RUT