Panasonic KX-TCD220SLT Service Manual page 54

KX-TCD220SLT / KX-TCA122EXT / KX-TCA121EXT
Items
(G)* Hookswitch Check with
DC Characteristics
(H)* DTMF Generator Check
(I)* Transmitted Power
Confirmation
(J) Modulation Check and
Adjustment
(K) Frequency Offset Check
Check
Point
- 1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with
600 Ω.
2. Set line voltage to 48V and line current to 40mA at off-hook condition of
normal telephone.
3. Execute the command "hookoff"
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command "hookon".
6. Confirm that the line current is less than + 0.8mA.
- 1. Connect CN1 (Telephone Socket) to DTMF tester.
2. Execute the command "hookoff" and "dtmf_hi".
3. Confirm that the high frequency (1477Hz) is -6.0dBm ~ -10.0dBm.
4. Execute the command "dtmf_lo".
5. Confirm that the low frequency (852Hz) is -8.5dBm ~ -12.5dBm.
- Remove the Antenna before starting step from 1 to 7.
1. Configure the DECT tester (CMD60) as follows;
<Setting>
· Short A-1 and GND
· Test mode: FP
· Traffic Carrier: 5
· Traffic Slot: 4
· Mode: Loopback
· PMID: 00000
· RF LEVEL = -70dBm.
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 "ANT1".
7. Confirm that the NTP value at ANT is 20dBm ~ 25dBm.
- Follow steps 1 to 6 of (I) above.
7.Confirm that the B-Field Modulation is -350 ~ -400/+320 ~ +370kHz/div
using data type Fig31.
8.Adjust the B-Field Modulation if required. (Execute the command "readmod"
and "wrtmod xx", where xx is the value.)
- Follow steps 1 to 6 of (I) above.
7.Confirm that the frequency offset is < ± 45kHz.
Procedure
54
Check or
Replace Parts
CN1, L6, L7,
Q4, R23, R25,
Q5, R26, R28,
IC8, D3
IC8, R39, C41,
R49, C46, C47,
R42, R43, R44,
R45, R46, R47,
R48, C108,
C109, C40,
C36, Q8, D4
IC2, IC8, R124,
R125, C153,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
IC2, IC8, R124,
R125, C153,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155
IC2, IC8, R124,
R125, C153,
C140, C141,
DA1, C142,
C143, C144, L3,
L4, R118, R119,
C135, R115,
R116, Q6,
C145, C147,
C149, C151,
C157, R123,
C158, C159,
C160, C161,
C162, C163,
C164, C136,
R117, R127,
C156, C154,
C155