Panasonic KX-TG7120FXT, Service Manual

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KX-TG7120BXS/KX-TG7120BXT/KX-TGA711CXS/KX-TGA711CXT
( M ) Sensitivity Receiver
Confirmation
- Follow steps 1 to 6 of (I) .
7.Set DECT tester power to -90 dBm.
8.Confirm that the BER is < 1000 ppm.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
( N ) Timing Confirmation - Follow steps 1 to 6 of (I) .
7.Confirm that the Timing accuracy is < ± 2.0 ppm.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
( O )* RSSI Level Confirmation - Follow steps 1 to 6 of (I) .
7.Execute the command “readrssi”.
8. Confirm that the returned value is 22 ± A (hex).
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
( P ) Power RAMP Confirma-
tion
- Follow steps 1 to 6 of (I) .
7.Confirm that Power RAMP is matching.
IC7, IC10, L7,
L3, L4, L6,
C117, C118,
C119, C120,
C124, C125,
R106, R109,
DA1, C102,
R102, R103,
Q10, C110,
C112, R111,
C126, C127,
R112
( Q )* Audio Check - 1. Link with Handset.
2. Input -45dBm/1kHz to MIC of Handset.
Measure the Level at Line I/F and distortion level.
3. Confirm that the level is -8.5 dBm ± 2 dBm and that the distortion level is < 5%
at TEL Line (600
Ω
Load).
4. Input -20 dBm/1 kHz to Line I/F.
Measure the level at Receiver of Handset and distortion level
(*Receive volume set to second position from minimum).
5. Confirm that the level is -21 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver (Volume Middle, 150
Ω
Load).
IC7, CN1, SA1,
L1, L2, D3, Q3,
Q4, R14, R15,
R16, R17
( R ) Charging Check - 1. Connect Charge Contact 12
Ω
/2 W resistor between and charge-.
2. Measure and confirm voltage across the resistor is 3.10 V ± 0.2 V.
R55, R56, C48,
C49
( S ) TAM Operation
Confirmation
- 1. TAM Confirmation (Execute the command “sendchar_VPI”)
2. Confirm the returned Value (Value is “D897FN”). IC8, IC9, R89,
R91, R92
Items Check
Point
Procedure Check or
Replace Parts