Troubleshooting By Symptom (Base Unit); Check Point (Base Unit) - Panasonic KX-TGD320ALB Service Manual

KX-TGD320ALB/KX-TGD322ALB/KX-TGD323ALB/KZ-TGDA30AZB
9.2.

Troubleshooting by Symptom (Base 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 the handset a little away from base unit even if the
handset is within range of the base unit.
The acoustic transmit level is high or low.
The acoustic reception level is high or low.
Base unit and handset do not link to each other.
The unit cannot charge.
TAM does not work. (for KX-TGD320 only)
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.40)
9.2.1.

Check Point (Base Unit)

Please follow the items below when BBIC or EEPROM or FLASH is replaced.
Note:
After the measuring, suck up the solder of TP.
*: The Setting Method of JIG (P.50) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.53).
Items
(A) 3.0 V Supply
Confirmation
(B) 3.0 V Supply
Confirmation
(C)* BBIC Confirmation
(D)* EEPROM Confirmation
(E)* BBIC Clock Adjustment
(F)* Hookswitch Check with
DC Characteristics
(G) DTMF Generator Check
Check
Point
VBAT 1. Confirm that the voltage between test point VBAT and GND is 3.0 V ± 0.2 V.
+3.0V 1. Confirm that the voltage between test point +3.0V and GND is 3.0 V ± 0.02 V.
2. Adjust the 3.0 V voltage of +3.0V executing command "VDA".
- 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. EEP-ROM Confirmation (Execute the command "sendchar EPV").
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
SUM" in Software_Version_Table.xls).
CKM 1. Input Command " sendchar sfr", then you can confirm the current value.
2. Check X'tal Frequency. (13.824 MHz ± 100 Hz).
3. If the frequency is not 13.824 MHz ± 100Hz, adjust the frequency of CKM
executing the command "sendchar sfr xx xx (where xx is the value)" so that
the reading of the frequency counter is 13.824000 MHz ± 5 Hz.
1. Connect Telephone Socket to Tel-simulator which is connected with 600 .
-
2. Set line voltage to 48 V and line current to 40mA at off-hook condition of
normal telephone.
3. Execute the command "hookoff"
4. Confirm that the line current is 40 mA ± 5 mA.
5. Execute the command "hookon".
6. Confirm that the line current is less than + 0.8 mA.
1. Connect Telephone Socket to DTMF tester. (Load=600 )
-
2. Link Handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -8.0 dBm ± 2.0 dB.
5. Confirm that the low Group is -10.0 dBm ± 2.0 dB.
You don't have DECT Tester.
Check item (A) - (G).
Check item (A) - (E), (M).
-
Check item (M).
Check item (M).
Check item (A) - (E).
Check item (N).
Check item (O).
Procedure
checksum value program number
80A9 DER1EN
40
Remedy (*2)
You have DECT Tester.
(Model Number: CMD60)
Check item (A) - (G)
Check item (A) - (E), (M)
Check item (H) - (L).
Check item (M).
Check item (M).
Check item (A) - (E), (H) - (L).
Check item (N).
Check item (O).
Check or
Replace Parts
IC302, C341,
R321, R322
IC501, C503
IC501, X501
IC501, IC611,
C611, RA611
IC501, X501,
C508, C509
P101, D101,
Q141, Q161,
Q142, D141,
R141~R145,
R159~R169
IC501, L101,
C184, D141