Panasonic KX-TG6621RUB / KX-TG6621RUM / KX-TG6621UAB / KX-TG6621UAM / KX-TG6621CAB / KX-TG6621CAM / KX-TG6622CAB / KX-TGA661RUB / KX-TGA661RUM Service Manual ▷ View online
41
KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
(F)* Battery Monitor Check
-
1. Apply 2.25 V between BATT+ and BATT-.
2. Execute the command
2. Execute the command
sendchar PAD
sendchar LED 0
sendchar CRX 0 1
sendchar AD1
It assumes that the return value is XX.
a) 6c XX 71: No need to adjust
b) XX: 6A ~ 6B: Need to adjust
XX: 72 ~ 74: Need to adjust
Write AD value of 2.25 V to EEPROM.
ex) read data: XX = 6A, write data: YY = 6A
read data: XX = 73, write data: YY = 73
EEPROM = 0009(Low Voltage) write “YY”
Execute the command “wreeprom 00 09 01 YY”.
EEPROM = 000A(No Voltage) write “YY -C"
Execute the command “wreeprom 00 0A 01 ZZ”.
sendchar LED 0
sendchar CRX 0 1
sendchar AD1
It assumes that the return value is XX.
a) 6c XX 71: No need to adjust
b) XX: 6A ~ 6B: Need to adjust
XX: 72 ~ 74: Need to adjust
Write AD value of 2.25 V to EEPROM.
ex) read data: XX = 6A, write data: YY = 6A
read data: XX = 73, write data: YY = 73
EEPROM = 0009(Low Voltage) write “YY”
Execute the command “wreeprom 00 09 01 YY”.
EEPROM = 000A(No Voltage) write “YY -C"
Execute the command “wreeprom 00 0A 01 ZZ”.
Note:
ZZ = YY - C
No Voltage writing data limit is ‘00’.
c) XX: 00 ~ 69: Reject
XX: 75 ~ FF: Reject
c) XX: 00 ~ 69: Reject
XX: 75 ~ FF: Reject
IC1, F1, C1,
R45
(G)
Battery Low
Confirmation
-
1. Apply 2.40 V between BATT+ and BATT-.
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25 V ± 0.08 V between BATT+ and BATT-.
4. Confirm that there is flashing of Battery Icon.
2. Confirm that there is no flashing of Battery Icon.
3. Apply 2.25 V ± 0.08 V between BATT+ and BATT-.
4. Confirm that there is flashing of Battery Icon.
IC1, F1, C1,
R45
(H)* BBIC Clock Adjustment
CLK
1. Apply 2.6 V between BATT+ and BATT- with DC power.
2. Input Command “sendchar sfr”, then you can confirm the current value.
3. Check X’tal Frequency. (10.368 MHz ± 20 Hz).
4. If the frequency is not 10.368 MHz ± 20 Hz, adjust the frequency of CLK
2. Input Command “sendchar sfr”, then you can confirm the current value.
3. Check X’tal Frequency. (10.368 MHz ± 20 Hz).
4. If the frequency is not 10.368 MHz ± 20 Hz, adjust the frequency of CLK
executing the command “sendchar sfr xx xx (where xx is the value)” so that the
reading of the frequency counter is 10.368000 MHz ± 5 Hz.
reading of the frequency counter is 10.368000 MHz ± 5 Hz.
Note:
Clear the registered information for Base Unit before measurement, because the
Frequency will not possibly get stable due to the registered information.
Pressing the button of "3" "5" "7" "#"clears the registration.
Register to it on Base Unit after measurement.
Frequency will not possibly get stable due to the registered information.
Pressing the button of "3" "5" "7" "#"clears the registration.
Register to it on Base Unit after measurement.
IC1, X1, C47
(I)*
Transmitted Power
Confirmation
-
Remove the Antenna before starting step from 1 to 4.
1. Configure the DECT tester (CMD60) as follows;
<Setting>
• Test mode: PP
• RFPI: 0102030405
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• RF LEVEL = -70 dBm
• PACKET: PP32Z
• RFPI: 0102030405
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• RF LEVEL = -70 dBm
• PACKET: PP32Z
2. Execute the command “sendchar TST 01 02 03 04 05".
3. Initiate connection from DECT tester.
4. Confirm that the NTP value at ANT is 19 dBm ~ 25 dBm.
3. Initiate connection from DECT tester.
4. Confirm that the NTP value at ANT is 19 dBm ~ 25 dBm.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
(J)* Modulation Check and
Adjustment
-
Follow steps 1 to 3 of (K).
4.Confirm that the B-Field Modulation is -350 ± 50/+350 ± 50 kHz/div &
Modulated width 610 kHz using data type Fig 31.
Modulated width 610 kHz using data type Fig 31.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
(K)*
Frequency Offset
Confirmation
-
Follow steps 1 to 3 of (I).
4.Confirm that the frequency Offset is < ± 20 kHz.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
Items
Check
Point
Procedure
Check or
Replace Parts
42
KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
(L)*
Frequency Drift
Confirmation
-
Follow steps 1 to 3 of (I).
4.Confirm that the frequency Drift is < ± 20 kHz/ms.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
(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.
5.Confirm that the BER is < 1000 ppm.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
(N)*
Power RAMP
Confirmation
-
Follow steps 1 to 3 of (I).
4.Confirm that Power RAMP is matching.
IC1,
C802~C806,
C809~C814,
C820, C822,
C809~C814,
C820, C822,
C823,
C825~C826,
L802, C863,
C864, L803,
C864, L803,
DA801, R806,
R807
(O)
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. Input -45 dBm (600
2. Set line voltage to 48V and line current to 50mA.
3. Input -45 dBm (600
Ω)/1 kHz to MIC of Handset. Measure the Level at Line I/F
and distortion level.
4. Confirm that the level is -2.0 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).
minimum).
6. Confirm that the level is -24 dBm and that the distortion level is <5% at
Receiver (34
Ω Load).
IC1, C12, C96,
C97, R215,
R27, RA4,
C11, C13,
R28, MIC
(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 50 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -30 dBm (600
2. Set line voltage to 48V and line current to 50 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -30 dBm (600
Ω)/1 KHz to Line I/F and measure Receiving level at SP+
and SP-.
5. Confirm that the level is -8.0 dBm and that the distortion level is < 5%.
(vol = Max at SP (8
Ω Load))
IC1, C12, C73,
D13, D14,
MIC, C11,
C13, RA4,
R27, R28,
C96, C97,
C96, C97,
R215, C72,
C73
(Q)
Charge Pump 3.0V
Supply Confirmation
CP3.0V
1. Confirm that the voltage between testpoint CP3.0V and GND is 3.0V-0.1/+0.3V. C49, C53, C54
(R)
Charge Pump CPV2
3.0V Supply
Confirmation
CPV2
1. Confirm that the voltage between testpoint CPV2 and GND is 3.0V ± 0.3V.
(Power is supplied when LED in on)
C52, C55
(S)
CP2.8V
Confirmation
CP2.8V
1. Confirm that the voltage between testpoint CPV2.8V and GND is 4.0 V ± 0.3 V.
D3, C51
Items
Check
Point
Procedure
Check or
Replace Parts
43
KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
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
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.
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.
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.
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KX-TG6621RU/KX-TG6621UA/KX-TG6621CA/KX-TG6622CA/KX-TGA661RU
10 Disassembly and Assembly Instructions
10.1. Disassembly Instructions
10.1.1. Base Unit
Ԙ
Remove the 4 screws to remove
the cabinet cover.
the cabinet cover.
Cabinet cover
Ԙ
4 screws
Tape and solders
Ԛ
ԙ
Insert a plastic card. (Ex. Used SIM card etc.)
between the cabinet body
and the cabinet cover, then
pull it along the gap to open
the cabinet.
between the cabinet body
and the cabinet cover, then
pull it along the gap to open
the cabinet.
Cabinet body
Cabinet cover
ԙ
Plastic card
Ԛ
Remove the tape and solders
to remove the main P.C. board.
to remove the main P.C. board.
Main P.C. board
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