54
KX-TG8421HGN/KX-TGA840FXN
(
K
)* Frequency Offset Confir-
mation
-
Follow steps 1 to 3 of
(I)
.
4.Confirm that the frequency Offset is < ± 50 kHz.
IC1,
C802~C806,
C808~C814,
C819~C820,
C822,
C825~C827,
C834,
C859~C864,
L801~L804,
DA801,
R801~R808
(
L
)* Frequency Drift Confir-
mation
-
Follow steps 1 to 3 of
(I)
.
4.Confirm that the frequency Drift is < ± 35 kHz/ms.
IC1,
C802~C806,
C808~C814,
C819~C820,
C822,
C825~C827,
C834,
C859~C864,
L801~L804,
DA801,
R801~R808
(
M
)*
Sensitivity Receiver
Confirmation
-
Follow steps 1 to 3 of
(I)
.
4.Set DECT tester power to -88 dBm.
5.Confirm that the BER is < 1000 ppm.
IC1,
C802~C806,
C808~C814,
C819~C820,
C822,
C825~C827,
C834,
C859~C864,
L801~L804,
DA801,
R801~R808
(
N
)* Power RAMP Confirma-
tion
-
Follow steps 1 to 3 of
(I)
.
4.Confirm that Power RAMP is matching.
IC1,
C802~C806,
C808~C814,
C819~C820,
C822,
C825~C827,
C834,
C859~C864,
L801~L804,
DA801,
R801~R808
(
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 -9.0 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 -24.5 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver. (vol = 2)
IC1, C12, D19,
D20, C96,
C97, R215,
R27, RA4,
C11, C13,
R28, D3, D4,
MIC, L9, RA2,
R73, R74
(
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 -9.5 dBm ± 2 dBm and that the distortion level is < 5%.
(vol = 3)
IC1, C12, C73,
D13, D14,
R152, R73,
R74, RA2,
MIC, C11,
C13, RA4,
R27, R28,
R208, R209,
C96, C97,
R215, C72
(
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
(
R
) Charge Pump 4.0V Sup-
ply Confirmation
CP4.0V
1. Confirm that the voltage between testpoint CP4.0V and GND is 4.0V I0.2V.
C50, C51
Items
Check
Point
Procedure
Check or
Replace Parts
Содержание KX-TGA840FXN
Страница 2: ...2 KX TG8421HGN KX TGA840FXN ...
Страница 14: ...14 KX TG8421HGN KX TGA840FXN 4 6 Signal Route ...
Страница 15: ...15 KX TG8421HGN KX TGA840FXN ...
Страница 16: ...16 KX TG8421HGN KX TGA840FXN 5 Location of Controls and Components 5 1 Controls 5 1 1 Base Unit 5 1 2 Handset ...
Страница 18: ...18 KX TG8421HGN KX TGA840FXN 6 2 3 Battery Level 6 2 4 Panasonic Ni MH Battery Performance supplied batteries ...
Страница 21: ...21 KX TG8421HGN KX TGA840FXN 7 1 2 Answering System Settings 7 1 3 SMS Settings ...
Страница 24: ...24 KX TG8421HGN KX TGA840FXN 7 6 Troubleshooting ...
Страница 25: ...25 KX TG8421HGN KX TGA840FXN Cross Rreference For Service Hint P 28 ...
Страница 26: ...26 KX TG8421HGN KX TGA840FXN ...
Страница 27: ...27 KX TG8421HGN KX TGA840FXN ...
Страница 28: ...28 KX TG8421HGN KX TGA840FXN 7 7 For Service Hint Cross Reference Battery Charge P 17 ...
Страница 29: ...29 KX TG8421HGN KX TGA840FXN 8 Service Mode 8 1 Engineering Mode 8 1 1 Base Unit ...
Страница 31: ...31 KX TG8421HGN KX TGA840FXN 8 1 2 Handset ...
Страница 40: ...40 KX TG8421HGN KX TGA840FXN Cross Reference Check Point Base Unit P 48 ...
Страница 42: ...42 KX TG8421HGN KX TGA840FXN Cross Reference Check Point Handset P 52 ...
Страница 57: ...57 KX TG8421HGN KX TGA840FXN ...
Страница 58: ...58 KX TG8421HGN KX TGA840FXN 10 1 2 Handset ...
Страница 59: ...59 KX TG8421HGN KX TGA840FXN 10 1 3 Charger Unit ...
Страница 60: ...60 KX TG8421HGN KX TGA840FXN 10 2 How to Replace the Handset LCD ...
Страница 85: ...85 KX TG8421HGN KX TGA840FXN Memo ...
Страница 97: ...97 KX TG8421HGN KX TGA840FXN 15 3 Cabinet and Electrical Parts Charger Unit ...
Страница 98: ...98 KX TG8421HGN KX TGA840FXN 15 4 Accessories and Packing Materials 15 4 1 KX TG8421HGN ...
Страница 99: ...99 KX TG8421HGN KX TGA840FXN 15 4 2 KX TGA840FXN ...