Panasonic KX-TG8011RUC / KX-TG8011RUS / KX-TG8011RUT / KX-TG8012RUS / KX-TG8012RUT / KX-TGA800RUC / KX-TGA800RUS / KX-TGA800RUT Service Manual ▷ View online
53
KX-TG8011RU/KX-TG8012RU/KX-TGA800RU
9.3.2.
Troubleshooting for Speakerphone
When the customer’s telephone line corresponds to the following conditions, and the transmission signal of SP-Phone is inter-
rupted, performing the next set up to a cordless handset will improve it to some extent.
Conditions
rupted, performing the next set up to a cordless handset will improve it to some extent.
Conditions
1. When customer’s line has less line loss.
ex.) The customer is using optical fiber, ISDN terminal adaptor, or PBX.
In this case, receiving signal is strong and it may affect transmission signal.
In this case, receiving signal is strong and it may affect transmission signal.
2. When the other party is talking from noisy place.
ex.) The other party is using cellular phone. The background noise is very loud.
In this case, the noise from the other party (i.e. surrounding noise) may affect transmission signal.
In this case, the noise from the other party (i.e. surrounding noise) may affect transmission signal.
Setting Method
• Change the handset address of EEPROM (0129) from 00 to 01 by Engineering Mode.
(O) Audio Check and Confir-
mation
-
1. Link to BASE which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 40 mA.
3. Input -45 dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -10.0 dBm ± 2 dBm and that the distortion level is < 5%
2. Set line voltage to 48 V and line current to 40 mA.
3. Input -45 dBm/1KHz to MIC and measure Line output level.
4. Confirm that the level is -10.0 dBm ± 2 dBm and that the distortion level is < 5%
at TEL Line (600
Ω Load).
5. Input -20 dBm/1KHz to Line I/F and measure Receiving level at REV+ and
REV-.
6. Confirm that the level is -21.0 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver. (vol = 2)
IC1, R23, C12,
D21, D22,
C96, C97,
C96, C97,
R27, RA4,
C11, C13,
R28, D3, D4,
R320, R321,
MIC
(P) 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 40 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -25 dBm/1KHz to Line I/F and measure Receiving level at SP+ and SP-.
5. Confirm that the level is -14 dBm ± 2 dBm and that the distortion level is < 5%.
2. Set line voltage to 48 V and line current to 40 mA.
3. Set the handset off-hook using SP-Phone key.
4. Input -25 dBm/1KHz to Line I/F and measure Receiving level at SP+ and SP-.
5. Confirm that the level is -14 dBm ± 2 dBm and that the distortion level is < 5%.
(vol = 3)
IC1, R23, C12,
C73, D13,
D14, R152,
C80, R320,
R321, MIC,
C80, R320,
R321, MIC,
C11, C13,
RA4, R27,
R28, C72,
D3, D4
(Q) Charge Pump 2.5V Sup-
ply Confirmation
CP2.5V
1. Confirm that the voltage between testpoint CP2.5V and GND is 2.5V -0.1/
+0.3V.
C52, C53, C49
Items
Check
Point
Procedure
Check or
Replace Parts
54
KX-TG8011RU/KX-TG8012RU/KX-TGA800RU
10 Disassembly and Assembly Instructions
10.1. Disassembly Instructions
10.1.1. Base Unit
55
KX-TG8011RU/KX-TG8012RU/KX-TGA800RU
10.1.2. Handset
56
KX-TG8011RU/KX-TG8012RU/KX-TGA800RU
10.1.3. Charger Unit
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