Panasonic KX-TG1283JXS Service Manual page 37

Items
(L)* Modulation Check and
Adjustment
(M) Frequency Offset
Confirmation
(N) Frequency Drift
Confirmation
(O) Sensitivity Receiver
Confirmation
(P) Timing Confirmation
(Q)* RSSI Level
Confirmation
(R) Power RAMP
Confirmation
(S) Audio Check and
Confirmation
Check
Point
- Follow steps 1 to 3 of (K).
4.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div using
data type Fig 31.
5.Adjust the B-Field Modulation if required. (Execute the command "Readmod"
and "wrtmod xx", where xx is the value.)
- Follow steps 1 to 3 of (K).
4.Confirm that the frequency Offset is < ± 45kHz.
- Follow steps 1 to 3 of (K).
4.Confirm that the frequency Drift is < ± 30kHz/ms.
- Follow steps 1 to 3 of (K).
4.Set DECT tester power to -88dBm.
5.Confirm that the BER is < 1000ppm.
- Follow steps 1 to 3 of (K).
4.Confirm that the Timing accuracy is < ± 2.0ppm.
- Follow steps 1 to 3 of (K).
4.Set DECT tester power to -81dBm.
5.Execute the command "readrssi".
6.Confirm that the returned value is 0×1C ± 8 (hex).
7.Set DECT tester power to -63dBm.
8.Execute the command "readrssi".
9.Confirm that the returned value is 0×25 ± 8 (hex).
- Follow steps 1 to 3 of (K).
4.Confirm that Power RAMP is matching.
- 1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48V and line current to 40mA.
3. Input -45dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -8.0dBm ± 2dBm and that the distortion level is < 5%
at TEL Line (600Ω Load).
5. Input -20dBm/1KHz to Line I/F and measure Receiving level at REV1 and
REV2.
6. Confirm that the level is -21dBm ± 2dBm and that the distortion level is < 5% at
Receiver. (vol = 2)
KX-TG1283JXS / KX-TG1283JXT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT
Procedure
37
Check or
Replace Parts
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, R54, C62,
C123, C60,
C63, C45,
C44, C47,
C46, C49,
C48, C50,
C53, C51,
R59, C54,
C55, CN6
IC1, C37, C68,
C91, R25,
R26, C20,
C12, C87,
C109, R85,
C103, C10,
C17, R86,
R29, R37,
R38, D4, D5,
C69, C70, C95