Panasonic KX-TG1283BXS, Service Manual

Page: 32 / 99

Items Check
Point
Procedure Check or
Replace Parts
( Q ) Audio Check - 1. Link with Handset.
2. Input -45dBm/1kHz to MIC ofHandset.
Measure the Level at Line I/F and distortion level.
3. Confirm that the level is -8.0 dBm ± 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 ofHandset and distortion level
(*Receive volume set to second position from minimum).
5. Confirm that the level is -21 dBm ± 2dBm and that the distortion level is < 5%
at Receiver (Volume Middle, 150
Ω
Load).
IC4, CN1,SA1,
L6, L7, D3, Q4,
Q5, R23, R25,
R26, R28, R63,
R39, C41, R49,
C46, C47, R42,
R43, R44, R45,
R46, R47, R48,
C108, C109,
C40, C36, Q8,
C24, R60, R62
( R ) SP-Phone
Audio Check
- 1. Press SP-PHONE button.
2. Press MUTE button.
3. Input -30Bm/1kHz to Line interface. (SP-Phone volume Maximum.)
4. Measure the output level and distortion level at base speaker.
5. Confirm that the level is -3dBm ±5dBm and that the distortion level is < 5%.
6. Press MUTE button.
7. Input -45dBm/1kHz to SP-Phone MIC. (TP1-TP2)
8. Measure the output level and distortion level at line interface.
9. Confirm that the level is -0dBm ±5dBm and that the distortion level is < 5%.
IC4, IC7, D311,
R375, C312,
C313, C314,
C315, C316,
C317, C318,
C319, R308,
R311, R312,
R314, C320,
C367, D301,
R301, R302,
R303, R304,
R305, R307,
C301, C302,
C303, C304,
C305, R306
( S ) Charging Check - 1. Connect Charge Contact 12
Ω
/2W resistor between and charge-.
2. Measure and confirm voltage across the resistor is 2.85V ± 0.2V.
R2, R3, R4, D6,
C180, C181,
C182, D361,
Q361, Q362,
C361, C362,
R361, R362,
R363, C322,
L13, L14
( T ) TAM Operation
Confirmation
- 1. TAM Confirmation (Execute the command “sendchar_VPI”)
2. Confirm the returned Value (Value is “D597EC”).
IC6, R91, R92,
C86, R33, R34
32
KX-TG1283BXS / KX-TG1283B XT / KX-TCA122CXS / KX-TCA122CXT / KX-TCA121CXS / KX-TCA121CXT