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KX-TG7227UA/KX-TG7228UA/KX-TGA721RU/KX-TGA721UA
9.2.2.
Check Point (Charger Unit)
Note:
After the measuring, suck up the solder of TP.
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.62).
The connection of adjustment equipment is as shown in Adjustment Standard (Charger Unit) (P.62).
(O)* Power RAMP Confirma-
tion
-
Follow steps 1 to 6 of (I).
7.Confirm that Power RAMP is matching.
IC7, IC10, L7,
C117, C118,
C124, C125,
R106, R109,
R106, R109,
DA1, C112,
R111, C126,
C127, R112,
R125, C128
(P)
Audio Check
-
1. Link with Handset.
2. Input -45 dBm/1kHz to MIC of Handset.
2. Input -45 dBm/1kHz to MIC of Handset.
Measure the Level at Line I/F and distortion level.
3. Confirm that the level is -10 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).
(*Receive volume set to second position from minimum).
5. Confirm that the level is -20 dBm ± 2 dBm and that the distortion level is < 5%
at Receiver (Volume Middle, 150
Ω Load).
IC7, CN1, SA1,
L1, L2, D3, Q3,
L1, L2, D3, Q3,
Q4, R14, R15,
R16, R17
(Q)
Charging Check
-
1. Connect Charge Contact 12
Ω/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 2.75 V ± 0.2 V.
R55, R56, D23,
R57, D22
(R)*
TAM Operation
Confirmation
-
1. TAM Confirmation (Execute the command “sendchar_VPI”)
2. Confirm the returned Value (Value is “DAA7RN 01”).
2. Confirm the returned Value (Value is “DAA7RN 01”).
IC8, IC11, R88,
C91, R91, R92
Items
Check
Point
Procedure
Check or
Replace Parts
(A)
Charging Check
-
1. Connect Charge Contact 12
Ω/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.3 V ± 0.2 V.
R1
D1, F1
Items
Check
Point
Procedure
Check or
Replace Parts
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