Panasonic KX-TG5511CAB / KX-TG5511CAJ / KX-TGA550RUB / KX-TGA550RUJ / KX-TGA551RUB / KX-TGA551RUJ (serv.man2) Service Manual ▷ View online
25
KX-TG5511CA/KX-TGA550RU/KX-TGA551RU
9.1.1.
Check Power
9.1.1.1.
Base Unit
Is the AC Adaptor inserted into AC outlet? (*1)
Cross Reference:
Power Supply Circuit (P.10)
Note:
(*1) Refer to Specifications (P.7) for part number and
supply voltage of AC Adaptor.
supply voltage of AC Adaptor.
9.1.1.2.
Handset
Cross Reference:
Power Supply Circuit/Reset Circuit (P.13)
Is input of IC1 about 6.5 V - 8 V?
Check C32, C36 are not shorted.
Check AC Adaptor.
Check Power Supply Circuit.
Is the output voltage of IC2 about 3.0 V?
Does BBIC (IC7: 10) oscillate at 10.368 MHz?
Check X1.
Check BBIC (IC7).
Is the Collector of Q8 about 1.8 V?
Is BBIC (IC7: 61) High?
Check BBIC (IC7).
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Is the Collector of Q9 about 2.5 V?
YES
Is the output voltage of BBIC (IC7:43) about 2.5V?
Is the output voltage of BBIC (IC7:42) about 3.0V?
YES
YES
YES
NO
NO
NO
Check Power Supply Circuit/Reset Circuit.
Check BBIC (IC1).
Check X1.
Is the voltage of BATT+ 2.3 V more?
Check the battery and around BATT+ and
BATT- are not shorted.
BATT- are not shorted.
Is the battery inserted BATT+ and BATT-?
Does BBIC (IC1: 10) oscillate at 10.368 MHz?
YES
YES
YES
NO
NO
YES
YES
Is the voltage of " 1.8V" about 1.8 V?
Is the voltage of CP3.0V about 3.0V?
Check BBIC (IC1).
YES
Is the voltage of CP4.0V about 4.0V?
NO
NO
26
KX-TG5511CA/KX-TGA550RU/KX-TGA551RU
9.1.2.
Check Battery Charge
9.1.2.1.
Base Unit
Cross Reference:
Charge Circuit (P.13)
9.1.2.2.
Handset
Cross Reference:
Check Power (P.25)
Charge Circuit (P.13)
Charge Circuit (P.13)
9.1.2.3.
Charger Unit
Cross Reference:
Charge Circuit (P.13)
Check Charge Circuit of Base Unit.
Check Handset.
Plug in the AC Power source.
Charge Handset on Base Unit.
Charge Handset on Base Unit.
Is the voltage of two charge contacts about
3 V or more?
3 V or more?
OK
NO
Check Charge Contacts at
Base Unit from mechanical point of view.
Base Unit from mechanical point of view.
YES
Is BBIC (IC1: 52) high at charge state?
Check Charge Circuit.
Check Power of Handset.
Is Check Power OK?
NO
NO
YES
Check Charge Circuit of Charger Unit.
Check Handset.
Plug in the AC Power source.
Charge Handset on Charger Unit.
Charge Handset on Charger Unit.
Is the voltage of two charge contacts about
3 V or more?
3 V or more?
OK
NO
Check Charge Contacts at Charger Unit
from mechanical point of view.
from mechanical point of view.
YES
27
KX-TG5511CA/KX-TGA550RU/KX-TGA551RU
9.1.3.
Check Link
9.1.3.1.
Base Unit
Note:
(*1) Refer to Troubleshooting by Symptom (Base Unit and Charger Unit) (P.36)
Cross Reference:
Check Point (Base Unit) (P.36)
Power Supply Circuit (P.10)
Power Supply Circuit (P.10)
Check around Power Supply Circuit.
Adjust VDD1 voltage to 1.8 V.
Refer to Check Point...(B).
Refer to Check Point...(B).
Does Base Unit make link with normal working
Handset?
Handset?
Check around X1 and IC801 and adjust clock
frequency.
Refer to Check Point...(G).
frequency.
Refer to Check Point...(G).
NO
NO
NO (*1)
NO
YES
YES
YES
YES
YES
NO
NO
NO
Replace with a new Circuit Board.
Is the modulation OK?
Refer to Check Point...(K).
Refer to Check Point...(K).
Is the voltage of VDD3 about 3.0 V?
Refer to Check Point...(A).
Refer to Check Point...(A).
Is there CMD60 (: DECT Tester)?
Does the RF clock (CLK) oscillate at 10.368 MHz in
Base Unit Test Mode?
Refer to Check Point...(G).
Base Unit Test Mode?
Refer to Check Point...(G).
Is the voltage of VDD1 about 1.8 V?
YES
Is the NTP value OK?
Refer to Check Point...(J).
Refer to Check Point...(J).
Does Base Unit make link with CMD60 in Base Unit
Test Mode?
Refer to Check Point...(J).
Test Mode?
Refer to Check Point...(J).
NO
YES
Base Unit is OK. Check Handset.
YES
YES
Is the Frequency Offset OK?
Refer to Check Point...(L).
Refer to Check Point...(L).
NO
OK
28
KX-TG5511CA/KX-TGA550RU/KX-TGA551RU
Cross Reference:
Check Point (Base Unit) (P.36)
YES
NO
NO
NO
NO
Is the Frequency Drift OK?
Refer to Check Point...(L).
Refer to Check Point...(L).
YES
Is the Sensitivity Receiver OK?
Refer to Check Point...(M).
Refer to Check Point...(M).
YES
Is the Timing OK?
Refer to Check Point...(N).
Refer to Check Point...(N).
YES
Is the Power RAMP OK?
Refer to Check Point...(O).
Refer to Check Point...(O).
Replace with a new Circuit Board.
...
Click on the first or last page to see other KX-TG5511CAB / KX-TG5511CAJ / KX-TGA550RUB / KX-TGA550RUJ / KX-TGA551RUB / KX-TGA551RUJ (serv.man2) service manuals if exist.