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Items
Adjustment
(C) 3.2V Supply
Confirmation
(D)
1.8V Supply
*
Confirmation
(E)
BBIC
*
Confirmation
(F)
EEP-ROM
*
Confirmation
(G)
BBIC Clock
*
Adjustment
(H)
Hookswitch
*
Check with
DC
Characteristics
(I)*
DTMF
Generator
Confirmation
Point
1. Confirm that the voltage between TP22 and GND is 3.15V ± 0.2V.
TP22
1. Confirm that the voltage between TP15 and GND is 1.8V ± 0.02V.
TP15
2. Adjust the 1.8V voltage of TP15 executing the command
"bandgap XX" (XX is the value).
1. BBIC Confirmation (Execute the command "getchk").
-
2. Confirm the returned checksum value.
Connection of checksum value and program number is
shown below.
1. EEP-ROM Confirmation (Execute the command "Chk540NZHv05.bat").
-
2. Confirm the returned checksum value (Checksum is 1C0CE).
1. Execute the command "Conttx".
TP49
2. Input command "rdeeprom 02 86 01", then you can confirm the current value.
3. Adjust the frequency of TP49 executing the command "setfreq xx (where xx is the
value)" so that the reading of the frequency counter is 10.368000MHz ± 10Hz.
-
1. Connect CN1 (Telephone Socket) to Tel-simulator which is connected with 600
2. Set line voltage to 48V at on-hook condition and line current to 40mA at off-hook
condition of nomal telephone.
3. Execute the command "sethooksw 01".
4. Confirm that the line current is 40mA ± 5mA.
5. Execute the command "sethooksw 00".
6. Confirm that the line current is 0mA + 0.2mA.
1. Connect CN1 (Telephone Socket) to DTMF tester.
-
2. Execute the command "sethooksw 01" and "dtmf_Hi".
3. Confirm that the high frequency (1477.06Hz) group is -8 ± 2dBm.
4. Execute the command "dtmf_lo".
5. Confirm that the low frequency (852.05Hz) group is -10 ± 2dBm.
6. Execute the command "dialtone 0".
Procedure
91
Check or
Replace
Parts
Q2, R12, C6,
C7, C8,
R13, R14
Q3, R15,
C11
C10
IC2, X1,
C42,
C43, C34,
C37,
C39, C44,
C48,
C45, R111,
C28
IC3, C53,
R56,
R57, IC2
IC2, IC4, L1,
C63, X1,
C42,
C43
CN1, L6,
.
L7,
Q4, R23,
R25,
Q5, R26,
R28
IC2, D3
IC2, R39,
C41,
R49, C46,
C47,
R43, R44,
R45,
R46, R47,
R48,
C40, C108,
C109,C36,
R42, Q8,
D4, R34
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