Troubleshooting By Symptom (Base Unit And Charger Unit) - Panasonic KX-TG1711MEB Service Manual

KX-TG1711MEB/KX-TG1712MEB/KX-TGA171MEB
9.2.

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
(*1) or not.
Symptom
You cannot dial.
You cannot hear the caller's voice.
You cannot use handset a little away from base unit
even if the handset is within range of the base unit.
The acoustic transmission level is high or low.
The acoustic reception level is high or low.
The unit does not link.
The unit cannot charge.
Note:
(*1) A general repair is possible even if you don't have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
(*2) Refer to Check Point (Base Unit) (P.24)
9.2.1. Check Point (Base Unit)
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, suck up the solder of TP.
*: PC Setting (P.34) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.36).
Items
(A) 2.65V Supply -
Confirmation
(B) VDDIO Confirmation -
(C)* BBIC Confirmation -
(D)* BBIC Clock Adjustment P1.0
(Important) CLK
(E)* Hookswitch Check with -
DC Characteristics
Adjustment
Point
1. Confirm that the voltage between VDD and GND is 2.65V ± 0.2V.
1. Confirm that the voltage between C24 and GND is 2.5 ± 0.3.
1. BBIC Confirmation (Execute the command "getchk").
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
ex.)
1. Execute the command "EnableClockOutput".
2. Input Command "GetFreq", then you can confirm the current value.
3. Check X'tal Frequency. (10.368 MHz ± 100 Hz).
4. If the frequency is not 10.368MHz ± 100Hz, adjust the frequency of CLK
executing the command "setfreq xx xx (where xx is the value)" so that the
reading of the frequency counter is 10.368000 MHz ± 5 Hz.
1. Connect J1 (Telephone Socket) to Tel-simulator which is connected with 600
Ω.
2. Set line voltage to 48V at on-hook condition 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 0mA + 2mA.
You don't have DECT Tester.
Check item (A)-(E).
Check item (A)-(D).
-
Check item (N).
Check item (N).
Check item (A)-(F).
Check item (M).
Procedure
checksum value program number
0152 DCM1EB
24
Remedy (*2)
You have DECT Tester.
(Model Number : CMD60)
Check item (A)-(E), (G)-(L).
Check item (A)-(D), (G)-(I), (K).
Check item (G), (J).
Check item (N).
Check item (N).
Check item (A)-(L).
Check item (M).
Check or
Replace Parts
C58, C60, F1
C35, C34, IC2
C29, R35, R36
C28,
C11, C48, R17
IC3, X1, C22
C23, C17
IC3, X1, C22
C23, C17
IC3, X1, C22
C23, C17
IC3, C30, C31,
D2, Q3, R26,
R22, Q2, C45,
C21, R18, R15
C103,