Troubleshooting By Symptom (Base Unit And Charger Unit); Check Point (Base Unit) - Panasonic KX-TCD300FXS Service Manual

KX-TCD300FXS / KX-TCD300FXT / KX-TCA130FXS / KX-TCA130FXT
13 TROUBLESHOOTING BY SYMPTOM (BASE UNIT AND
CHARGER UNIT)
If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
or not.
*: Refer to Check Point (Base Unit) (P.52)

13.1. Check Point (Base Unit)

Please follow the items below when BBIC or EEPROM or FLASH ROM is replaced.
Note:
After the measuring, sock up the solder of TP.
*: PC Setting (P.63) is required beforehand.
The connections of adjustment equipments are as shown in Adjustment Standard (Base Unit) (P.57).
Items
(A) 3.3V Supply
Confirmation
(B) 2.5V Supply
Confirmation
(C)* 1.8V Supply
Confirmation
(D)* BBIC Confirmation
(E)* EEP-ROM Confirmation
(F)* BBIC Clock Adjustment
(G)* Hookswitch Check with
DC Characteristics
Check
Point
TP14 1. Confirm that the voltage between test point VDD3 and GND is 3.3V ± 0.2V.
TP22 1. Confirm that the voltage between test point VDD2 and GND is 2.5V ± 0.2V.
TP15 1. Confirm that the voltage between test point VDD1 and GND is 1.8V ± 0.1V.
- 1. BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
- 1. EEP-ROM Confirmation (Execute the command
"ChkTCD210FXrev025_14_3.bat").
2. Confirm the returned checksum value (Checksum is 20865).
CLK 1. Input Command "rdeeprom 00 01 01", then you can confirm the current value.
2. Adjust the frequency of CLK executing the command "setfreq 00 xx (where xx
is the value)" so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
- 1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with
600 Ω.
2. Set line voltage to 48V and line current to 40mA at off-hook condition of
normal telephone.
3. Execute the command "hookoff"
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command "hookon".
6. Confirm that the line current is less than + 0.8mA.
Procedure
52
Check or
Replace Parts
D1, IC1, C1,
C119, C2, R8,
R9, C114, C34,
C8, R85
Q2, C5, C7,
C168
Q3, C6, C11,
C48, C4, C37,
C39, C44, C45
IC8, X1, C42,
C43, R40, C6,
C11, C48, C4,
C37, C39, C44,
C45, R124,
R125, C153
IC3, C53, R56,
R57
IC2, IC4, R124,
R125, C153,
X1, C42, C43
CN1, L6, L7,
Q4, R23, R25,
Q5, R26, R28,
IC8, D3