KX-TG7321CAC, KX-TGA731RUC - Panasonic Telephone Service Manual (repair manual). Page 48

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48
KX-TG7321CAC/KX-TGA731RUC
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.65).
(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 -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). 
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, SA1, L1, 
L2, D3, Q3, Q4, 
R14, R15, R16, 
R17
(R)
Charging Check
-
1. Connect Charge Contact 12 
Ω/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.10 V ± 0.3 V.
R55, R56, R57, 
D22, D23, C623
(S)
TAM Operation Confir-
mation
-
1. TAM Confirmation (Execute the command "sendchar VPI").
2. Confirm the returned Value (Value is "DAS7RN_02").
IC7, IC421, 
R424~R429, 
C421, C422, 
Q421
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 3.1 V ± 0.3 V.
R1 
D1, F1
Items
Check 
Point
Procedure
Check or 
Replace Parts
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