Adjustments (Handset); Adjustment - Panasonic KX-TCD450 Series Service Manual

15 ADJUSTMENTS (HANDSET)

If your unit have below symptoms, adjust or confirm each item using remedy column from the table.
The movement of Battery Low indicator is wrong.
The handset does not respond to a call from base unit.
The handset does not transmit or the transmit frequency is off.
The transmit frequency is off.
The transmit power output is low, and the operating distance between base unit and handset is
less than normal.
The reception sensitivity of base unit is low with noise.
Does not link between base unit and handset.
The reception level is high or low.
The transmit level is high or low.
* : Refer to Adjustment (P.51)

15.1. Adjustment

Please follow the items below when BBIC or EEPROM or FLASH ROM are replaced.
Items
(A) 4.0V Supply
Confirmation
(B) BBIC Confirmation
(C) Charge Control Check &
Charge Current Monitor
Confirmation
(D)* Charge Detection (OFF)
Confirmation
(E)* Battery Monitor
Confirmation
(F) Battery low Confirmation
(G)* BBIC Clock Adjusment
Symptom
Adjustment
Point
- 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.
- 1. BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
- 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.
- 1. Stop supplying 6V to TP5(+) and TP6(-).
2. Execute the command "charge".
3. Confirm that the returned value is 0x00 (hex).
- 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".
- 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).
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.
KX-TCD450RUM / KX-A145RUM / KX-TCD450RUT / KX-A145RUT
Make confirmation in item (A), (B), (E), (F)
Make adjustments in item (A), (B), (G), (I)~(M)
Make adjustments in item (A), (B), (G)~(J), (L)
Make confirmation in item (A), (B), (G)~(J), (L)
Make confirmation in item (H), (K)
Make confirmation in item (K)
Make confirmation in item (A), (B), (G)~(M)
Make adjustments in item (N)
Make adjustments in item (O)
Procedure
51
Remedy*
Check or
Replace Parts
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
IC1,X1,C6,
C7,C70
IC1,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
IC1,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
IC1,C52,Q7,
Q8,R51,R12,
C11,F1,R14,
R15,C53,C1
IC1,F1,R14,
R15,R12,C11,
C1,C53,IC4,
R2,R17,R18,
R31,C8,C10,
C23,C24,C36,
C66,C67,C68,
D19
IC1,X1,C6,
C7,C70,IC10,
L5,C111