Adjustments (Handset) - Panasonic KX-TCD400RUB Service Manual

KX-TCD400RU B / KX-TCD400R UC / KX-TCD400R UF / KX-A140RU B / KX-A140RU C / KX-A140RUF

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.42)
15.1. Adjustment
Please follow the items below when BBIC or EEPROM are replaced.
Items
(A) 4.0V Supply
Confirmation
(B) VBACK Status
Confirmation
(C) BBIC Confirmation
(D) Charge Control Check &
Charge Current Monitor
Confirmation
(E)* Charge Detection (OFF)
Confirmation
(F)* Battery Monitor
Confirmation
(G) Battery low Confirmation
Symptom
Adjustment
Point
- 1. Confirm that the consumption current is < 200mA , that is, there is no short
circuit.
2. Confirm that the voltage between TP14 and GND is 4.1V ± 0.2V.
- 1. Confirm that the voltage between TP18 and GND is 0V ± 0.4V.
- 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:
98 < returned value < A8 (Hex)
4. Execute the command "WRTBAT2 XX".
XX: (returned value) - 06 (Hex)
- 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).
Make confirmation in item (A)~(C), (F)~(G)
Make adjustments in item (A)~(C), (H), (J)~(N)
Make adjustments in item (A)~(C), (H)~(K), (M)
Make confirmation in item (A)~(C), (H)~(K), (M)
Make confirmation in item (I), (L)
Make confirmation in item (L)
Make confirmation in item (A)~(C), (H)~(N)
Make adjustments in item (O)
Make adjustments in item (P)
Procedure*
42
Remedy
Check or
Replace Parts
IC1,F1,R21,
R4,C33,L2,
D1,C15,C2,
C14,Q1,R3,
R2,D2,R22,
C26,X1,C16,
C17
IC1,F1,R21,
R4,C33,L2,
D1,C15,C2,
C14,Q1,R3,
R2,D2,R22,
C26,R16,X1,
C16,C17
IC1,X1,C16,
C17
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
IC1,D4,L4,
L5,Q2,Q3,
R6,D2,R22,
C26,F1,R21,
R4,C33
IC1,F1,R21,
R4,C33,C12,
C31,R17,R20,
C10,C11,D6,
D7