Panasonic KX-TG9127UAS / KX-TG9127UAT / KX-TGA910UAS / KX-TGA910UAT Service Manual ▷ View online
49
KX-TG9127UAS/KX-TG9127UAT/KX-TGA910UAS/KX-TGA910UAT
(G)* Hookswitch Check with
DC Characteristics
-
1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with
600
Ω.
2. Set line voltage to 48V and line current to 40mA at off-hook condition of nor-
mal telephone.
3. Execute the command “hookoff”
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8mA.
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8mA.
L1, L2, Q3, R14,
R15, Q4, R16,
R17, IC7, D3
(H) DTMF Generator Check
-
1. Connect CN1 (Telephone Socket) to DTMF tester. (Road=600
Ω)
2. Link Handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -3dBm ± 2dBm.
5. Confirm that the low Group is -6dBm ± 2dBm.
3. Confirm DTMF character.
4. Confirm that the high Group is -3dBm ± 2dBm.
5. Confirm that the low Group is -6dBm ± 2dBm.
IC7, R67, IC6,
R116, C141,
R29, C22, C23,
R18~R24,
C14~C17, Q5,
D4
(I)* Transmitted Power Con-
firmation
-
Remove the Antenna before starting step from 1 to 7.
1. Configure the DECT tester (CMD60) as follows;
<Setting>
• Short A_1 and GND.
• Test mode: FP
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70dBm.
• Test mode: FP
• Traffic Carrier: 5
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70dBm.
2. Execute the command “testmode”.
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT
RFPI”.
5. Initiate connection from Dect tester (“set up connect”)
6. Execute the command “ANT1”.
7. Confirm that the NTP value at ANT is 20dBm ~ 25dBm.
6. Execute the command “ANT1”.
7. Confirm that the NTP value at ANT is 20dBm ~ 25dBm.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(J)* Modulation Check and
Adjustment
-
Follow steps 1 to 6 of (I).
7.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div using
data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command “readmod”
and “wrtmod xx”, where xx is the value.)
data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command “readmod”
and “wrtmod xx”, where xx is the value.)
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(K)* Frequency Offset Check
-
Follow steps 1 to 6 of (I).
7.Confirm that the frequency offset is < ± 45kHz.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(L)* Frequency Dirft Confir-
mation
-
Follow steps 1 to 6 of (I).
7.Confirm that the frequency drift is < ± 30kHz/ms.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
Items
Check
Point
Procedure
Check or
Replace Parts
50
KX-TG9127UAS/KX-TG9127UAT/KX-TGA910UAS/KX-TGA910UAT
(M)*
Sensitivity Receiver
Confirmation
-
Follow steps 1 to 6 of (I).
7.Set DECT tester power to -90dBm.
8.Confirm that the BER is < 1000ppm.
8.Confirm that the BER is < 1000ppm.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(N)*
Timing Confirmation
-
Follow steps 1 to 6 of (I).
7.Confirm that the Timing accuracy is < ± 2.0ppm.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(O)* RSSI Level Confirmation
-
Follow steps 1 to 6 of (I).
7.Execute the command “readrssi”.
8. Confirm that the returned value is 22 ± A (hex).
8. Confirm that the returned value is 22 ± A (hex).
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(P)* Power RAMP Confirma-
tion
-
Follow steps 1 to 6 of (I).
7.Confirm that Power RAMP is matching.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
(Q)
Audio Check
-
1. Link with Handset.
2. Input -45dBm/1kHz to MIC of Handset.
2. Input -45dBm/1kHz to MIC of Handset.
Measure the Level at Line I/F and distortion level.
3. Confirm that the level is -10dBm ± 2dBm and that the distortion level is < 5%
at TEL Line (600
Ω Load).
4. Input -20dBm/1kHz to Line I/F.
Measure the level at Receiver of Handset and distortion level
(*Receive volume set to second position from minimum).
(*Receive volume set to second position from minimum).
5. Confirm that the level is -21dBm ± 2dBm and that the distortion level is < 5%
at Receiver (Volume Low, 150
Ω Load).
IC7, CN1, SA1,
L1, L2, D3, Q3,
L1, L2, D3, Q3,
Q4, R14, R15,
R16, R17
(R)
Charging Check
-
1. Connect Charge Contact 12
Ω/2W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.10V ± 0.2V.
R55, R56, C48,
C49
(S)*
TAM Operation
Confirmation
-
1. TAM Confirmation (Execute the command “sendchar_VPI”)
2. Confirm the returned Value (Value is “D887RN 02”).
2. Confirm the returned Value (Value is “D887RN 02”).
IC8, IC9, R89,
R91, R92
Items
Check
Point
Procedure
Check or
Replace Parts
51
KX-TG9127UAS/KX-TG9127UAT/KX-TGA910UAS/KX-TGA910UAT
9.2.2.
Check Point (Charger Unit)
Note:
After the measuring, suck up the solder of TP.
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.68).
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.68).
Items
Check
Point
Procedure
Check or
Replace Parts
(A)
Charging Check
-
1. Connect Charge Contact 12
Ω/2W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.3V ± 0.2V.
R2, R1, R3, R4
52
KX-TG9127UAS/KX-TG9127UAT/KX-TGA910UAS/KX-TGA910UAT
9.3.
Troubleshooting by Symptom (Handset)
If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not.
(*1) or not.
Note:
(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
(*2) Refer to Check Point (Handset) (P.52)
level in detail.
(*2) Refer to Check Point (Handset) (P.52)
9.3.1.
Check Point (Handset)
Please follow the items below when BBIC is replaced.
Note:
After the measuring, suck up the solder of TP.
*: PC Setting (P.69) is required beforehand.
The connections of simulator equipments are as shown in Adjustment Standard (Handset) (P.71).
*: PC Setting (P.69) is required beforehand.
The connections of simulator equipments are as shown in Adjustment Standard (Handset) (P.71).
Items
Check
Point
Procedure
Check or
Replace Parts
(A)* 1.8V Supply Adjustment
VDD1
1. Confirm that the voltage between test point TP10 and GND is 1.8V ± 0.02V.
2. Execute the command “bandgap”, then check the current Value.
3. Adjust the 1.8V voltage of TP12 executing command “bandgap XX” (XX is the
2. Execute the command “bandgap”, then check the current Value.
3. Adjust the 1.8V voltage of TP12 executing command “bandgap XX” (XX is the
value).
IC1, Q7, C42,
R4
(B)
DC/DC Supply Confir-
mation
VDD3
1. Confirm that the voltage between test point TP10 and GND is 3.35V ± 0.3V
(Backlight is OFF)/4.3V ± 0.3V (Backlight is ON).
IC1, F1, C1,
C3, Q1, D1,
L1, Q15, R60,
R61, R50, L6,
R61, R50, L6,
R43, R54,
R46, C36,
R49, R57,
R46, C36,
R49, R57,
C57, R51
(C)
3.0V Supply Confirma-
tion
VDD2
1. Confirm that the voltage between test point TP11 and GND is 3.0V ± 0.1V.
IC1, Q8, R3,
C43, R52,
R53, C34
(D)*
BBIC Confirmation
(include Flash ROM)
-
1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC1, X1, C35,
R12, R20,
R21, R73,
R21, R73,
R74, IC2, R67,
R26, C18, IC3,
R26, C18, IC3,
C20
(E)*
SRAM Confirmation
-
1. SRAM Confirmation (Execute the command “SRAM_Check.bat”)
2. Confirm “OK” is displayed.
3. If “NG” is displayed, the PCB will be rejected.
2. Confirm “OK” is displayed.
3. If “NG” is displayed, the PCB will be rejected.
IC3, C20
(F)* Flash ROM Confirmation
(Substitute EEPROM)
-
1. Flash ROM Confirmation (Execute the command “ChkTGA910XXrevYY.bat”).
XX: country code
YY: revision number
YY: revision number
2. Confirm the returned checksum value.
3. The checksum is displayed in the last output line.
3. The checksum is displayed in the last output line.
Note:
“XX”, “YY”, and “checksum” vary depending on the country version. You can find
them in the batch file, PQZZ- mentioned in JIG and PC (P.69).
them in the batch file, PQZZ- mentioned in JIG and PC (P.69).
IC1, IC2, R67,
R26, C18
Click on the first or last page to see other KX-TG9127UAS / KX-TG9127UAT / KX-TGA910UAS / KX-TGA910UAT service manuals if exist.