Troubleshooting By Symptom (Handset); Check Point (Handset) - Panasonic KX-TG9581B Service Manual

9.3.

Troubleshooting by Symptom (Handset)

If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not.
Symptom
Battery strength is not indicated correctly by Battery icon.
You cannot hear the caller's voice.
You cannot use handset little away from base unit even if the
handset is within range of the base unit.
the Audio level is high or low.
The SP-Phone level is high or low.
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 (Handset) (P.45)
9.3.1.

Check Point (Handset)

Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, suck up the solder of TP.
*: The Setting Method of JIG (Handset) (P.59) is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.61).
Items
(A)* 1.8 V Supply Adjustment
(B)* BBIC Confirmation
(C)* EEP-ROM Confirmation
(D) Charge Control Check &
Charge Current Monitor
Check
(E)* Charge Detection (OFF)
Check
Check
Point
1.8V 1. Confirm that the voltage between test point 1.8V and GND is 1.8 V ± 0.02 V.
2. Execute the command "VDD", then check the current value.
3. Adjust the 1.8V voltage of 1.8V executing command "VDD XX"(XX is the
value).
- 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 "sendchar EPV").
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
SUM" in Software_Version_Table.xls).
- 1. Apply 5.0 V between CHG(+) and CHG(-) with DC power supply and set
current limit to 150 mA.
Confirm the indication of "charging" on LCD.
2. Confirm that the current limit LED of DC power supply is ON/OFF.
Confirm it after waiting over 1 minute at least.
(If charge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)
- 1. Stop supplying 5.0 V to CHG (+) and CHG (-).
2. Confirm the indication of "charging" has been cleared.
You don't have DECT Tester.
Check item (A) - (D), (E) - (G).
Check item (A) - (C), (H), (N).
-
Check item (K).
Check item (L).
Procedure
checksum value program number
ex.)
F24F
45
KX-TG9581B/KX-TG9582B/KX-TGA950B
Remedy (*2)
You have DECT Tester.
(Model Number: CMD60)
Check item (A) - (D), (E) - (G).
Check item (A) - (C), (H - (J)) - (K).
Check item (I) - (J).
Check item (K).
Check item (L).
JGV2AB
Check or
Replace Parts
IC1, Q1, C44,
R45, C40,
C45, F1
IC1, X1, R61
IC1, IC3, RA5,
C69
IC1, Q4 Q9,
Q2, Q3, R2,
R7, R8, R6,
R9, C19, F1,
R45
IC1, Q4 Q9,
Q2, Q3, R2,
R7, R8, R6,
R9, C19, F1,
R45