Panasonic KX-TG8021BXS, Service Manual

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KX-TG8021BXS/KX-TG8021BXT/KX-TGA800BXS/KX-TGA800BXT
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.61).
( Q ) Audio Check - 1. Link with 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 -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 -22 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 and charge-.
2. Measure and confirm voltage across the resistor is 2.75 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 "DAS7EA 03"). IC7, IC421,
R424~R429,
C421, C422,
Q421
Items Check
Point
Procedure Check or
Replace Parts
( A ) Charging Check - 1. Connect Charge Contact 10
Ω
/2 W resistor between and charge-.
2. Measure and confirm voltage across the resistor is 2.75 V ± 0.3 V.
R1
D1, F1
Items Check
Point
Procedure Check or
Replace Parts