Panasonic KX-TG2248S Service Manual ▷ View online
(1*) BS : Base unit which is checked.
HS : Handset unit which is checked.
BS (working) : Base unit which is working.
HS (working) : Handset unit which is working.
(*2)<Spectrum analyzer setting>
SPAN: 10MHz
VBW, RBW: 1MHz
SWEEP: 1sec.
(*3)See TEST MODE ( P.44).
(*4)See RF-DSP interface signal wave form (P.42).
See CIRCUIT BOARD (BASE UNIT) (P.89).
See CIRCUIT BOARD (Handset) (P.93).
(*5)See Base Unit Reference Drawing (P.48).
(*6) see Handset Reference Drawing (P.49)
(*7) see Test mode flow chart for Base Unit (P.44)
(*8) see Test mode flow chart for Handset (P.46)
Note:
DSP is IC201. (for Base Unit)
DSP is IC201. (for Handset)
12.7.4. Check Table for RF Block
No
Item
BS (Base unit) (*1)
HS (Handset) (*1)
1a.
Link confirmation
[NORMAL
POWER]
[NORMAL
POWER]
Procedure
1.
Put “HS (working)” on BS.
2.
Set MODE to [NORMAL POWER] of “HS
(working)“.
(working)“.
3.
Press [TALK] key of “HS (working)” to
establish link.
establish link.
1.
Put HS on “BS (working)”.
2.
Set MODE to [NORMAL POWER] of “BS
(working)“.
(working)“.
3.
Press [TALK] key of “HS” to establish link.
1b.
Link confirmation
[TEST POWER]
for confirmation
the sensitivity of
RF Block
[TEST POWER]
for confirmation
the sensitivity of
RF Block
Procedure
1.
Change MODE to [TEST POWER] of “HS
(working)”.
(working)”.
2.
Press [TALK] key of “HS (working)” to
establish link.
establish link.
3.
Confirm the suspicious BS links to HS
(working) with approximately the same
distance from BS (working).
(working) with approximately the same
distance from BS (working).
1.
Change MODE to [TEST POWER] of “BS
(working)”.
(working)”.
2.
Press [TALK] key of “HS“ to establish link.
3.
Confirm the suspicious HS links to BS
(working) with approximately the same
distance from HS (working).
(working) with approximately the same
distance from HS (working).
2
IC801 working
confirmation
confirmation
Procedure
1.
Set Test-mode Just entering to test
mode.(*3)
mode.(*3)
2.
Confirm oscillate signal of RF UNIT (8.192
MHz at OSC). (*5)
MHz at OSC). (*5)
1.
Set Test-mode Just entering to test
mode.(*3)
mode.(*3)
2.
Confirm oscillate signal of RF UNIT (8.192
MHz at OSC). (*6)
MHz at OSC). (*6)
Check point
1.
Check Xtal oscillator at Q260 - C of the
base unit.
base unit.
2.
Check DSP interface(IC801
←→
DSP/BS)
(*4).
1.
Check Xtal oscillator at Q204 - C of the
handset.
handset.
2.
Check DSP interface(IC801
←→
DSP/HS)
(*4).
3
TX Power
confirmation
confirmation
Procedure
1.
Put RF wire to ANT and ANT_GND (See
Base Unit Reference Drawing).
Base Unit Reference Drawing).
Connect this wire to the Spectrum
Analyzer.
Analyzer.
2.
Set Test-mode. (*7)
3.
Confirm TX power level within +11±5dBm
(*2)
(*2)
1.
Put RF wire to ANT and ANT_GND (See
Handset Reference Drawing).
Handset Reference Drawing).
Connect this wire to the Spectrum
Analyzer.
Analyzer.
2.
Set Test-mode. (*8)
3.
Confirm TX power level within +11±5dBm
(*2)
(*2)
Check point
1.
Check L801 ~ L805, D801, D802, R805,
R806, C804, C805, C807, FL801 and
soldering.
R806, C804, C805, C807, FL801 and
soldering.
2.
Check Antenna in BS.
1.
Check L801 ~ L805, D801, D802, R805,
R806, C804, C805, C807, FL801 and
soldering.
R806, C804, C805, C807, FL801 and
soldering.
2.
Check Antenna in HS.
4
Receiver
confirmation
confirmation
Procedure
1.
Put “HS (working)” on BS.
2.
Set MODE to [NORMAL POWER] of “HS
(working)”.
(working)”.
3.
Press [TALK] key of “HS (working)“ to
establish link.
establish link.
4.
Change MODE to [TEST POWER] of “HS
(working)“.
(working)“.
5.
Press [TALK] key of “HS (working)” to
establish link. Confirm the suspicious BS
links to HS (working) with approximately
the same distance from BS (working).
establish link. Confirm the suspicious BS
links to HS (working) with approximately
the same distance from BS (working).
1.
Put HS on “BS (working)”.
2.
Set MODE to [NORMAL POWER] of “BS
(working)”.
(working)”.
3.
Press [TALK] key of “HS” to establish link.
4.
Change MODE to [TEST POWER] of “BS
(working)”.
(working)”.
5.
Press [TALK] key of “HS” to establish link.
Confirm the suspicious HS links to BS
(working) with approximately the same
distance from HS (working).
Confirm the suspicious HS links to BS
(working) with approximately the same
distance from HS (working).
Check point
1.
Check C115, C114, L111, C118 soldering.
2.
Check Antenna in BS.
1.
Check C115, C114, L111, C118 soldering.
2.
Check Antenna in HS.
41
KX-TG2248S
12.7.5. RF-DSP interface signal wave form
42
KX-TG2248S
12.8. Check Handset Transmission
Cross Reference:
SIGNAL ROUTE (P.66).
12.9. Check Handset Reception
Cross Reference:
SIGNAL ROUTE (P.66).
Note:
When checking the RF UNIT, Refer to Check the RF Unit
(P.38)
(P.38)
12.10. Check Caller ID
Cross Reference:
Telephone Line Interface (P.58).
Calling Line Identification (Caller ID)/Call Waiting Caller
ID (P.60).
ID (P.60).
Note:
•
•
Make sure the format of the Caller ID or Call Waiting
Caller ID service of the Telephone company that the
customer subscribed to.
Caller ID service of the Telephone company that the
customer subscribed to.
•
•
Also we recommend to confirm that the customer is
really a subscriber of the service.
really a subscriber of the service.
43
KX-TG2248S
13 TEST MODE
13.1. Test mode flow chart for Base Unit
(*1) It shows whether the telephone line is connected or not.
-ON: OFF HOOK.
-OFF: ON HOOK
44
KX-TG2248S
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