Panasonic KX-TCD325UA / KX-TCA132UA / KX-TCA130UA Service Manual ▷ View online
14 TROUBLESHOOTING BY SYMPTOM (BASE UNIT AND
CHARGER UNIT)
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 (Base Unit) (P.49)
level in detail.
(*2): Refer to Check Point (Base Unit) (P.49)
14.1. Check Point (Base Unit)
Please follow the items below when BBIC or EEPROM or FLASH ROM is replaced.
Note:
After the measuring, sock up the solder of TP.
*: PC Setting (P.60) is required beforehand.
The connections of adjustment equipments are as shown in Adjustment Standard (Base Unit) (P.54).
*: PC Setting (P.60) is required beforehand.
The connections of adjustment equipments are as shown in Adjustment Standard (Base Unit) (P.54).
Items
Check
Point
Procedure
Check or
Replace Parts
(A)
3.3V Supply
Confirmation
TP14
1.
Confirm that the voltage between test point VDD3 and GND is 3.3V ± 0.2V.
D1, IC1, C1,
C119, C2, R8,
R9, C114, C34,
C8, R85
(B)
2.5V Supply
Confirmation
TP22
1.
Confirm that the voltage between test point VDD2 and GND is 2.5V ± 0.2V.
Q2, C5, C7,
C168
(C)*
1.8V Supply
Confirmation
TP15
1.
Confirm that the voltage between test point VDD1 and GND is 1.8V ± 0.1V.
Q3, C6, C11,
C48, C4, C37,
C39, C44, C45
(D)*
BBIC Confirmation
-
1.
BBIC Confirmation (Execute the command "getchk").
2.
Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC8, X1, C42,
C43, R40, C6,
C11, C48, C4,
C11, C48, C4,
C37, C39, C44,
C45, R124,
R125, C153
(E)* EEP-ROM Confirmation
-
1.
EEP-ROM Confirmation (Execute the command "ChkTCD220XXrevYY").
XX: country code
YY: revision number
2.
Confirm the returned checksum value.
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.53).
find them in the batch file, PQZZ- mentioned in JIG and PC (P.53).
IC3, C53, R56,
R57
(F)* BBIC Clock Adjustment
CLK
1.
Input Command “rdeeprom 00 01 01”, then you can confirm the current value.
2.
Adjust the frequency of CLK executing the command "setfreq xx (where xx is
the value)" so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
the value)" so that the reading of the frequency counter is 10.368000MHz ±
10Hz.
IC2, IC4, R124,
R125, C153,
X1, C42, C43
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KX-TCD325UA / KX-TCA132UA / KX-TCA130UA
Items
Check
Point
Procedure
Check or
Replace Parts
(G)* Hookswitch Check with
DC Characteristics
-
1.
Connect CN1 (Telephone Socket) to Tel-simulator which is connected with
600
600
Ω.
2.
Set line voltage to 48V and line current to 40mA at off-hook condition of
nomal telephone.
nomal 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.
CN1, L6, L7,
Q4, R23, R25,
Q5, R26, R28,
Q5, R26, R28,
IC8, D3
(H)* DTMF Generator Check
-
1.
Connect CN1 (Telephone Socket) to DTMF tester.
2.
Execute the command "hookoff" and "dtmf_hi".
3.
Confirm that the high frequency (1477Hz) is -3.0dBm ~ ±2.0dBm.
4.
Execute the command "dtmf_lo".
5.
Confirm that the low frequency (852Hz) is -6.0dBm ~ ±2.0dBm.
IC8, R39, C41,
R49, C46, C47,
R42, R43, R44,
R45, R46, R47,
R42, R43, R44,
R45, R46, R47,
R48, C108,
C109, C40,
C109, C40,
C36, Q8, D4
(I)*
Transmitted Power
Confirmation
-
Remove the Antenna before starting step from 1 to 7.
1.
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.
· Short A_1 and GND.
· 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
RFPI“.
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.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(J)
Modulation Check and
Adjustment
-
Follow steps 1 to 6 of (I) above.
7.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div
using data type Fig31.
using data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command "readmod"
and "wrtmod xx", where xx is the value.)
and "wrtmod xx", where xx is the value.)
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(K) Frequency Offset Check
-
Follow steps 1 to 6 of (I) above.
7.Confirm that the frequency offset is < ± 45kHz.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
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KX-TCD325UA / KX-TCA132UA / KX-TCA130UA
Items
Check
Point
Procedure
Check or
Replace Parts
(L)
Frequency Dirft
Confirmation
-
Follow steps 1 to 6 of (I).
7.Confirm that the frequency drift is < ± 30kHz/ms.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(M)
Sensitivity Receiver
Confirmation
-
Follow steps 1 to 6 of (I).
7.Set DECT tester power to -88dBm.
8.Confirm that the BER is < 1000ppm.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(N)
Timing Confirmation
-
Follow steps 1 to 6 of (I).
7.Confirm that the Timing accuracy is < ± 2.0ppm.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(O)*
RSSI Level
Confirmation
-
Follow steps 1 to 6 of (I).
7.Execute the command "readrssi".
8. Confirm that the returned value is 0×22 ± A (hex).
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
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KX-TCD325UA / KX-TCA132UA / KX-TCA130UA
Items
Check
Point
Procedure
Check or
Replace Parts
(P)
Power RAMP
Confirmation
-
Follow steps 1 to 6 of (I).
7.Confirm that Power RAMP is matching.
IC2, IC8, R124,
R125, C153,
C140, C141,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
(Q)*
Audio Check
-
1.
Link with 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 -9.5dBm ± 2dBm and that the distortion level is < 5%
at TEL Line (600
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).
5.
Confirm that the level is -20.5dBm ± 2dBm and that the distortion level is <
5% at Receiver (Volume Middle, 150
5% at Receiver (Volume Middle, 150
Ω Load).
IC8, CN1,SA1,
L6, L7, D3, Q4,
Q5, R23, R25,
R26, R28
(R)
Charging Check
-
1.
Connect Charge Contact 12
Ω/2W resistor between charge+ and charge-.
2.
Measure and confirm voltage across the resistor is 2.85V ± 0.2V.
R3, R4, R5, D6,
C107, C180,
C181
(S)
TAM Operation
Confirmation
-
1.
TAM Confirmation (Execute the command "sendchar_VPI")
2.
Confirm the returned Value (Value is "D597JP").
IC5, R132,
C195, C196,
C197, R130,
C169, C208,
R133, R134,
C197, R130,
C169, C208,
R133, R134,
C209, C210
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KX-TCD325UA / KX-TCA132UA / KX-TCA130UA
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