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KX-TGC220/KX-TGC222/KX-TGC223/KX-TGCA20
(O) SP phone Audio Check
and Confirmation
- 1. Link to Base which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 50 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -30 dBm (600 )/1 KHz to Line I/F and measure Receiving level at SP+
and SP-.
5. Confirm that the level is -10.0 dBm ± 3 dB (for NZ) or -9.0±3 dBm (for AL) and
that the distortion level is < 5 %.
(vol = Max at SP (8 Load))
IC1, C78, C79,
R76, R77
(P) Charge Pump 3.0 V
Supply Confirmation
CP3V 1. Confirm that the voltage between testpoint CP3.0V and GND is 3.0 V ± 0.3 V. C30, C53, C29
(Q) Charge Pump CP4V
Supply Confirmation
CP4V 1. Confirm that the voltage between testpoint CP4V and GND is 4.0 V ± 0.3 V.
(Power is supplied when LED in on)
C52, C55,
C30, C29
Items Check
Point
Procedure Check or
Replace Parts
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