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14
3.2.5.
Troubleshooting by Symptom (Handset)
3.2.5.1.
Check Point (Handset)
[Changed from original section “9.3.1. Check Point (Handset)”]
Please follow the items below when BBIC or EEPROM is replaced.
Note:
After the measuring, suck up the solder of TP.
*: Connections is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.18).
*: Connections is required beforehand.
The connections of adjustment equipment are as shown in Adjustment Standard (Handset) (P.18).
(K)*
Modulation Check
-
ANTI_TP
Follow steps 1 to 6 of (J).
7.Confirm that the B-Field Modulation is -350 ± 50/ +350± 50 kHz/div &
Modulated width 610 kHz using data type Fig31.
Modulated width 610 kHz using data type Fig31.
IC7
(L)* Frequency Offset Check
-
ANTI_TP
Follow steps 1 to 6 of (J).
7.Confirm that the frequency offset is < ± 20 kHz.
IC7
(M)*
Frequency Drift
Confirmation
-
ANTI_TP
Follow steps 1 to 6 of (J).
7.Confirm that the frequency drift is < ± 20 kHz/ms.
IC7
(N)*
Sensitivity Receiver
Confirmation
-
ANTI_TP
Follow steps 1 to 6 of (J).
7.Set DECT tester power to -90 dBm.
8.Confirm that the BER is < 1000 ppm.
8.Confirm that the BER is < 1000 ppm.
IC7,
C802~C804,
C822, C826,
C851, C853,
C822, C826,
C851, C853,
DA801, DA802,
R806, R807,
R106, R109
(O)*
Timing Confirmation
-
ANTI_TP
Follow steps 1 to 6 of (J).
7.Confirm that the Timing accuracy is
• ± 5.0 ppm (When adjust the frequency of CLK in item (G)).
• ± 15 ppm (When do not adjust the frequency of CLK in item (G)).
• ± 15 ppm (When do not adjust the frequency of CLK in item (G)).
IC7, X1
(P)*
Power RAMP
Confirmation
-
Follow steps 1 to 6 of (J).
7.Confirm that Power RAMP is matching.
IC7
(Q)
Audio Check
-
1. Link with Handset which is connected to Line Simulator.
2. Set line voltage to 48 V and line current to 50 mA.
3. Input -45 dBm(600
2. Set line voltage to 48 V and line current to 50 mA.
3. Input -45 dBm(600
)/1 kHz to MIC of Handset. Measure the Level at Line I/F
and distortion level.
4. Confirm that the level is -2.0 dBm and that the distortion level is <5% at TEL
Line (600
Load).
5. Input -20dBm(600
)/1kHz to Line I/F. Measure the Level at Receiver of
Handset and distortion level (Receive volume set to second position from
minimum).
minimum).
6. Confirm that the level is -24 dBm and that the distortion level is <5% at
Receiver (34
Load).
IC7, SA1, P1,
D3, Q3, Q4,
R14, R15, R16,
R17, D21, Q5,
R19, R20, C14,
C56, R117,
R116, R29,
R116, R29,
C22
(R)
Charging Check
-
1. Connect Charge Contact 12
/2 W resistor between charge+ and charge-.
2. Measure and confirm voltage across the resistor is 3.9 V ± 0.4 V.
R55, R56, D22,
C623
(S)
2.4V Supply
Confirmation VDD2
VDD2
1. Confirm that the voltage between test point VDD2 and GND is 2.5V ± 0.2V.
IC7, Q9, C617,
R71
Items
Check
Point
Procedure
Check or
Replace Parts
Items
Check
Point
Procedure
Check or
Replace Parts
(A)* 1.8 V Supply Adjustment
VDD1
1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.02 V.
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the
value).
IC1, Q2, C44,
C344, C40,
C45, F1, C10,
C2, C34, R7
(B)*
BBIC Confirmation
-
1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown below.
IC1, X1, RA61,
R64, R66
(C)* EEP-ROM Confirmation
-
1. EEP-ROM Confirmation (Execute the command "sendchar EPV").
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
2. Confirm the returned Value. (Value for reference is written at "EEPROM C/
SUM” in Software_Version_Table.xls).
IC1, IC3,
RA40, C172
(D) Charge Control Check &
Charge Current Monitor
Check
-
1. Apply 5.0 V between CHG(+) and CHG(-) with DC power supply and set
current limit to 150 mA.
Confirm the indication of “charging” on LCD.
Confirm the indication of “charging” on LCD.
2. Confirm that the current limit LED of DC power supply is ON/OFF.
Confirm it after waiting over 1 minute at least.
(If charge control cannot be confirmed by this procedure, please use battery to
handset power supply and try again.)
handset power supply and try again.)
IC1, Q4 Q9,
Q5, Q6, R9,
Q5, Q6, R9,
R4, R5, R33,
C19, F1, C1,
R30, R31, R8,
R45
checksum value
program number
ex.)
57AC
DCK2RN
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