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Model
KX-TG5511UAB KX-TG5511UAR KX-TGA550RUB KX-TGA550RUR KX-TGA551RUB KX-TGA551RUR
Pages
86
Size
3.69 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS PHONE
File
kx-tg5511uab-kx-tg5511uar-kx-tga550rub-kx-tga550ru.pdf
Date
PREV: Panasonic KX-TG5511RUR / KX-TGA550RUR / KX-TGA551RUR Service Manual / Supplement

Panasonic KX-TG5511UAB / KX-TG5511UAR / KX-TGA550RUB / KX-TGA550RUR / KX-TGA551RUB / KX-TGA551RUR Service Manual ▷ View online

41
KX-TG5511UA/KX-TGA550RU/KX-TGA551RU
(K)* Frequency Offset Confir-
mation
-
Follow steps 1 to 3 of (I).
4.Confirm that the frequency Offset is < ± 50 kHz.
IC1, 
C802~C806, 
C808~C814, 
C819~C820, 
C822, 
C825~C827, 
C834, 
C860~C864, 
L801~L804, 
DA801, 
R801~R808
(L)* Frequency Drift Confir-
mation
-
Follow steps 1 to 3 of (I).
4.Confirm that the frequency Drift is < ± 35 kHz/ms.
IC1, 
C802~C806, 
C808~C814, 
C819~C820, 
C822, 
C825~C827, 
C834, 
C860~C864, 
L801~L804, 
DA801, 
R801~R808
(M)*
Sensitivity Receiver 
Confirmation
-
Follow steps 1 to 3 of (I).
4.Set DECT tester power to -88 dBm.
5.Confirm that the BER is < 1000 ppm.
IC1, 
C802~C806, 
C808~C814, 
C819~C820, 
C822, 
C825~C827, 
C834, 
C860~C864, 
L801~L804, 
DA801, 
R801~R808
(N)* Power RAMP Confirma-
tion
-
Follow steps 1 to 3 of (I).
4.Confirm that Power RAMP is matching.
IC1, 
C802~C806, 
C808~C814, 
C819~C820, 
C822, 
C825~C827, 
C834, 
C860~C864, 
L801~L804, 
DA801, 
R801~R808
(O) Audio Check and Confir-
mation
-
1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48V and line current to 50mA.
3. Input -45dBm(600
Ω)/1kHz to MIC of Handset. Measure the Level at Line I/F
and distortion level.
4. Confirm that the level is -2.5dBm±2 dBm and that the distortion level is <5% at
TEL Line (600
Ω Load).
5. Input -20dBm(600
Ω)/1kHz to Line I/F. Measure the Level at Receiver of
Handset and distortion level (Receive volume set to second position from
minimum).
6. Confirm that the level is -30.5dBm±2 dBm and that the distortion level is <5%
at Receiver (150
Ω Load).
IC1, C12, C96, 
C97, R215, 
R27, RA4, 
C11, C13, 
R28, D3, D4, 
MIC, R73, R74
(P) SP phone Audio Check 
and Confirmation
-
1. Link to Base which is connected to Line Simulator.
2. Set line voltage to 48V and line current to 50mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -25 dBm(600
Ω)/1KHz to Line I/F and measure Receiving level at SP+
and SP-.
5. Confirm that the level is -11.0 dBm ± 2 dBm and that the distortion level is <
5%. (vol = 3)
IC1, C12, C73, 
D13, D14, 
R73, R74, 
MIC, C11, 
C13, RA4, 
R27, R28, 
C96, C97, 
R215, C72
(Q) Charge Pump 3.0V Sup-
ply Confirmation
CP3.0V
1. Confirm that the voltage between testpoint CP3.0V and GND is 3.0±0.3V.
C49, C52~C54
(R) Charge Pump 4.0V Sup-
ply Confirmation
CP4.0V
1. Confirm that the voltage between testpoint CP4.0V and GND is 4.0V ±0.3V.
C50, C51, C55
Items
Check 
Point
Procedure
Check or 
Replace Parts
42
KX-TG5511UA/KX-TGA550RU/KX-TGA551RU
9.3.2.
Troubleshooting for Speakerphone
When the customer’s telephone line corresponds to the following conditions, and the transmission signal of SP-Phone is
interrupted, performing the next set up to a cordless handset will improve it to some extent.
Conditions
1. When customer’s line has less line loss.
ex.) The customer is using optical fiber, ISDN terminal adaptor, or PBX.
In this case, receiving signal is strong and it may affect transmission signal.
2. When the other party is talking from noisy place.
ex.) The other party is using cellular phone. The background noise is very loud.
In this case, the noise from the other party (i.e. surrounding noise) may affect transmission signal.
Setting Method
• Change the handset address of EEPROM (0129) from 00 to 01 by Engineering Mode.
43
KX-TG5511UA/KX-TGA550RU/KX-TGA551RU
10 Disassembly and Assembly Instructions
10.1. Disassembly Instructions
10.1.1. Base Unit
Ԙ
Remove the 4 screws to remove
the cabinet cover.
ԙ
Remove  tapes and solders.  
Ԛ
Remove the solders of rear side. 
 Cabinet cover
Ԙ
4 screws
Tapes and solders
ԙ
ԛ
Screw
Ԛ
Solders
Operatinal P.C. board
Rear side
 Remove the screw to remove
 the operational P.C. board.
ԛ
44
KX-TG5511UA/KX-TGA550RU/KX-TGA551RU
10.1.2. Handset
Ԙ
Remove the 4 screws.
ԙ
Insert a JIG (PQDJ10006Y) 
between the cabinet body 
and the cabinet cover, then 
pull it along the gap to open 
the cabinet.
Ԛ
Likewise, open the other
side of the cabinet.
ԛ
Remove the cabinet cover 
by pushing it upward.
Ԝ
Remove the solders and tape.
ԝ
Remove the screw to remove 
the main P. C. board.
Cabinet cover 
Cabinet body 
Cabinet cover 
4 screws
Ԙ
Main P.C. board
Ԝ
Screw
ԝ
Solders and
Tape
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