Panasonic KX-TG8521UAB / KX-TGA850RUB (serv.man2) Service Manual ▷ View online
25
KX-TG8521UAB/KX-TGA850RUB
8.3.
How to Clear User Setting
Units are reset to the Factory settings by this operation (Erase recorded Voice messages*, stored Phone numbers, Caller list
and etc.)
and etc.)
Note:
• Some menus are not reset. Refer to Operating Instructions (P.18).
• The reset menus differ depending on the following operations.
• This operation should not be performed for a usual repair.
• The reset menus differ depending on the following operations.
• This operation should not be performed for a usual repair.
* KX-TG8521/KX-TG8522/KX-TG8523/KX-TG8524 only
8.3.1.
Resetting both base unit and handset
Both the base unit and the registered handset which you did the following steps
to
are reset. Other registered handsets
will not be reset.
Note:
(*1) Refer to Registering a Handset to a Base Unit in the Operating Instructions.
8.3.2.
Resetting only handset
The only handset is reset by doing the following steps
to
.
Note: (*2)
• The handset registration to the base unit is cancelled.
• If the handset needs to be registered to the base unit, refer to Registering a Handset to a Base Unit in the Operating
• If the handset needs to be registered to the base unit, refer to Registering a Handset to a Base Unit in the Operating
Instructions.
• If users do not bring the base unit with them, the registration procedure has to be done by users themselves.
1
ԛ
1
Connect the AC adaptor to the base unit and install the charged batteries into the handset.
2
Confirm the handset is registered to the base unit ( lights).
If the handset is not registered to the base unit ( lights), register it. (*1)
3
Lift the handset and press
{ih} to put the handset in standby mode.
4
Press , , and key of the handset simultaneously until a confirmation tone is heard.
5
Disconnect the AC adaptor, then remove the battery.
1
5
9
Handset
Base unit
w
1
ԛ
1
Install the charged batteries into the handset.
2
Lift the handset and press {ih} to put the handset in standby mode.
4
Remove the battery.
3
Press , , and key of the handset simultaneously until a confirmation tone is heard. (*2)
3
5
7
#
Handset
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KX-TG8521UAB/KX-TGA850RUB
9 Troubleshooting Guide
9.1.
Troubleshooting Flowchart
Flow Chart
Cross Reference:
Check Power (P.27)
Bell Reception (P.35)
Check Battery Charge (P.28)
Check Link (P.29)
Check the RF part (P.31)
Check Handset Transmission (P.34)
Check Handset Reception (P.34)
Signal Route (P.16)
Check Caller ID (P.34)
Check TAM Operation (P.35)
Bell Reception (P.35)
Check Battery Charge (P.28)
Check Link (P.29)
Check the RF part (P.31)
Check Handset Transmission (P.34)
Check Handset Reception (P.34)
Signal Route (P.16)
Check Caller ID (P.34)
Check TAM Operation (P.35)
Power ON Base Unit
Bell
Link
Battery Charge
Handset Voice Transmission
Handset Voice Reception
DTMF dial
OK
OK
No Link
OK
OK
OK
OK
OK
Not working
No bell
No voice
No charge
No voice
No signal
Check Handset Transmission
Check Handset Reception
Signal Route
Check Battery Charge
Bell Reception
Check Power
Check Link
Range
NG
Check the RF part
Caller ID Reception
OK
No signal
Check Caller ID
TAM Operation
OK
Not working
Check TAM Operation
27
KX-TG8521UAB/KX-TGA850RUB
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.9)
Note:
(*1) Refer to Specifications (P.6) 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 J101 about 6.5 V - 8 V?
Check C32, C36 are not shorted, F101 is not
broken.
broken.
Check AC Adaptor.
Check Power Supply Circuit.
Is the output voltage of VDD3 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? (VDD1)
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? (VDD2)
YES
Is the output voltage of BBIC (IC7:43) about 2.5V?
(VDD5)
(VDD5)
Is the output voltage of BBIC (IC7:42) about 3.0V?
(VDD4)
(VDD4)
YES
YES
YES
NO
NO
NO
Check Power Supply Circuit/Reset Circuit.
Check X1, C8, C9.
Is the voltage of TP 3.0 V about 3.0 V?
Is the voltage of TP-VBAT 2.3 V more?
Check the battery and around BATT+ and
BATT- are not shorted.
BATT- are not shorted.
Is the battery inserted to BATT+ and BATT-?
Does BBIC (IC1: 36) oscillate at 13.824 MHz?
YES
YES
YES
NO
NO
NO
Is the voltage of TP VDDC about 1.2 V?
NO
YES
Check BBIC (IC1).
YES
28
KX-TG8521UAB/KX-TGA850RUB
9.1.2.
Check Battery Charge
9.1.2.1.
Base Unit
Cross Reference:
Charge Circuit (P.14)
9.1.2.2.
Handset
Cross Reference:
Check Power (P.27)
Charge Circuit (P.14)
Charge Circuit (P.14)
9.1.2.3.
Charger Unit
Cross Reference:
Charge Circuit (P.14)
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: 34) 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
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