Adjustments (Handset And Charger Unit); Adjustment (Handset) - Panasonic KX-TCA275CE Service Manual

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11.2. Adjustments (Handset and Charger Unit)

11.2.1. Adjustment (Handset)

When you change IC3, you must adjust (A)(F)(H)(I)(K)
Items
(A)* 1.8V Supply Confirma-
tion
(B) 3V Supply Confirmation
(C)* Software Confirmation
(D) Charge Control Check &
Charge Current Monitor
Confirmation
(E)* Charge Detection (OFF)
Confirmation
(F)* Battery Monitor Confir-
mation
Adjustment
Point
CK17 1. Confirm that the voltage between test point "CK17" and GND is 1.8V±0.02V.
2. Adjust the 1.8V voltage of CK17 executing command "VDD XX" (XX is the
value).
CK18 1. Confirm that the voltage between "CK18" and GND is 3.0V±0.15V.
- 1. BBIC Confirmation (Execute the command "SLF", and "VER").
2. Confirm the returned checksum value.
Connection of checksum value and software version is shown below.
- 1. Apply 6V between CN3(+) and CN4(-) 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 CN3(+) and CN4(-).
2. Execute the command "BTS".
3. Confirm that the returned value is 0x00 (hex).
- 1. Apply 3.5V ± 0.02V between BATT(+) and BATT(-).
2. Execute the command "LED 0", then "AD1".
3. Confirm:
20 returned value
4. Adjust the Battery Monitor executing command.
(XX=returned value, YY=XX-9(hex))
WB2 XX
WB4 XX
WB3 YY
Procedure*
38 (Hex)
47
KX-TCA275CE
Check or
Replace Parts
IC3, Q8, R26
IC3, Q10,
R28, R32, R33
IC3, X1,
C17
(IC1, IC2)
IC3, R5,
Q2, Q3, Q4,
L1, L2, R10,
R14, D11,
D13, R15, R16
IC3, R10, R5,
L1, L2, C7
IC3,
R35, R38