Panasonic KX-TCD420GS Service Manual page 54

Items
Adjustment
(B) VBACK Status
Confirmation
(C) BBIC
Confirmation
(D) Charge Control
Check & Charge
Current Monitor
Confirmation
(E) Charge Detection
* (OFF)
Confirmation
Point
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).
Procedure*
50
Check
Replac
Parts
IC1,F1,R
R4,C33
D1,C15
C14,Q1
R2,D2,R
C26,R16
C16,C
IC1,X1,C
C17
IC1,D4,
L5,Q2,Q
R6,D2,R
C26,F1,R
R4,C3
IC1,D4,
L5,Q2,Q
R6,D2,R
C26,F1,R
R4,C3