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KX-TG6711RU/KX-TG6712RU/KX-TG6721RU/KX-TG6722RU/KX-TG6711CA/KX-TG6712CA/KX-TG6721CA/KX-TG6722CA/KX-TG6711UA/KX-TG6712UA/KX-TG672IUA//KX-TGA671EX
(N)
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. Input -45 dBm (600
2. Set line voltage to 48 V and line current to 50 mA.
3. Input -45 dBm (600
Ω)/1 kHz to MIC of Handset. Measure the Level at Line I/F
and distortion level.
4. Confirm that the level is -1 dBm ± 5 dB and that the distortion level is < 5 % at
TEL Line (600
Ω Load).
5. Input -20 dBm (600
Ω)/1 kHz to Line I/F. Measure the Level at Receiver of
Handset and distortion level (Receive volume set to second position from
minimum).
minimum).
6. Confirm that the level is -24 dBm ± 4 dB and that the distortion level is < 5 % at
Receiver (34
Ω Load).
IC1, C12, C96,
C97, R5, R27,
RA4, C11,
C13, R28, MIC
(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
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
Ω)/1 KHz to Line I/F and measure Receiving level at SP+
and SP-.
5. Confirm that the level is -8 dBm and that the distortion level is < 5 %.
(vol = Max at SP (8
Ω Load))
IC1, C12, C73,
D13, D14,
MIC, C11,
C13, RA4,
R27, R28,
C96, C97, R5,
C72, C73
(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, C54
(Q) Charge Pump CP_LED
3.0V Supply
Confirmation
CP_LED
1. Confirm that the voltage between testpoint CP_LED and GND is 3.0 V ± 0.3 V.
(Power is supplied when LED in on)
C52, C55
(R)
Charge Pump CP2.8V
Supply Confirmation
CP2.8V
1. Confirm that the voltage between testpoint CPV2.8V and GND is 2.8V ± 0.3 V.
C30, C53,
C54, D3, C51
Items
Check
Point
Procedure
Check or
Replace Parts
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