KX-TG6451RUT, KX-TGA641RUT - Panasonic Telephone Service Manual (repair manual). Page 38

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(I)* Hookswitch Check with 

DC Characteristics

-

1. Connect TIP/RING (Telephone Socket) to Tel-simulator which is connected

with 600 

Ω.

2. Set line voltage to 48 V and line current to 40 mA at off-hook condition of nor-

mal telephone.

3. Execute the command “hookoff”
4. Confirm that the line current is 40 mA ± 5 mA.
5. Execute the command “hookon”.
6. Confirm that the line current is less than + 0.8 mA.

P101,D101,
Q111,Q112,

R110,R111,

R112,R123,

R115,R117,

R118,D117

(J) DTMF Generator Check

-

1. Connect TIP/RING (Telephone Socket) to DTMF tester. (Load=600 

Ω)

2. Link cordless handset and push dial key.
3. Confirm DTMF character.
4. Confirm that the high Group is -3 dBm ± 2 dBm.
5. Confirm that the low Group is -6 dBm ± 2 dBm.

IC501,R154,

R153,C151,

Q131

(K)* Transmitted Power Con-

firmation

ANT2

Remove the Antenna before starting step from 1 to 7.

1. Configure the DECT tester (CMD60) as follows;

<Setting>

• Test mode: FP
• Traffic Carrier: 2
• Traffic Slot: 4
• Mode: Loopback
• PMID: 00000
• RF LEVEL = -70 dBm.

2. Execute the command “testmode”.
3. Execute the command “sendchar dmv 2 2”.
4. Check that “Signalling Status” has been set to “Locked”, then press “ACCEPT

RFPI”.

5. Initiate connection from Dect tester (“set up connect”)
6. Execute the command “ANT2”.
7. Confirm that the NTP value at ANT is 19.0 dBm ~ 25.0 dBm.

DA802,C859,
C803,DA801,

C812,L802,

IC801,IC501

(L)*

Modulation Check

ANT2

Follow steps 1 to 6 of (K).

7.Confirm that the B-Field Modulation is -370 ± 30/+370 ± 30 kHz/div using data
type Fig31.

DA802,C859,
C803,DA801,

C812,L802,

IC801,IC501

(M)* Frequency Offset Check

ANT2

Follow steps 1 to 6 of (K).

7.Confirm that the frequency offset is < ± 50 kHz.

DA802,C859,
C803,DA801,

C812,L802,

IC801,IC501

(N)* Frequency Dirft Confir-

mation

ANT2

Follow steps 1 to 6 of (K).

7.Confirm that the frequency drift is < ± 35 kHz/ms.

C803,DA801,

C812,L802,

IC801,IC501

(O)*

Sensitivity Receiver 

Confirmation

ANT2

Follow steps 1 to 6 of (K).

7.Set DECT tester power to -88 dBm.
8.Confirm that the BER is < 1000 ppm.

DA802,C859,
C803,DA801,

C826,R807,
C822,IC501

(P)*

Timing Confirmation

ANT2

(Through Cordless handset)
Follow steps 1 to 6 of (K).

7.Confirm that the Timing accuracy is 

• ± 5.0 ppm (When adjust the frequency of CLK in them (H).
• ± 15.0 ppm (When do not adjust the frequency of CLK in them (A).

DA802,C859,
C803,DA801,

C812,L802,

IC801,IC501

(Q)* RSSI Level Confirmation

ANT2

Follow steps 1 to 6 of (K).

7.Execute the command “readrssi”.
8. Confirm that the returned value is 22 ± A (hex).

DA802,C859,
C803,DA801,

C826,R807,
C822,IC501

Items

Check 

Point

Procedure

Check or 

Replace Parts