When Replacing Bbic And X'tal - Panasonic VL-SWD272BX Service Manual

VL-SWD272BX/SWD272CX/SWD272CX1/SWD272AZ/VL-WD613CX/VL-WD613CX1

11.3.2. When replacing BBIC and X'tal

n Preparation:
1. PC setting refer to "Wireless Monitor Station (P.21).
2. Supply DC 2.6V at CL5.
Note:
Test points: Refer to Main Board (Bottom View) (P.103).
No. Items
1 1.8 V Supply Adjustment
2 3.0 V Supply Confirmation CL4(BB3.0V)
3 BBIC Clock Adjustment
4 Transmitted Power
Check and Adjustment
5 Modulation Check and
Adjustment
6 Frequency Offset Check
7 Sensitivity Receiver Confir-
mation
8 Power RAMP Confirmation TP-ANT1
• After finishing the adjustment, turn off and disconnect the 3-Wire cable.
Check Point
CL3(BB1.8V) 1.Confirm that the voltage between test point CL3 and CL9 (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
value).
1.Confirm that the voltage between test point CL4 and CL9 (GND) is
3.0 V ± 0.2 V.
CL1 (BXTAL) 1.Confirm frequency between CL1 and CL9 (GND).
2.Input Command "sfr", then you can confirm the current value.
3.Check X' tal Frequency. (10.368 MHz ± 100 Hz).
4.If the frequency is not 10.368 MHz ± 100 Hz, adjust the frequency of CKM
executing the command "sfr xx xx" (where xx xx is the value: d) so that the
reading of the frequency counter is 10.368000 MHz ± 5 Hz.
TP-ANT1 Remove the wire Antenna before starting step from 1 to 5.
1.Configure the DECT tester (CMD60) as follows;
<Setting>
- Test mode: PP
- RFPI: 0102030405
- Traffic Carrier: 5
- Traffic Slot: 4
- Mode: Loopback/RF LEVEL = -70 dBm
- PACKET: PP32Z
2.Execute the command "PAP".
3.Execute the command "TST 01 02 03 04 05".
4.Initiate connection from DECT tester.
5.Confirm that the NTP value at ANT is 20 dBm ~ 24 dBm.
executing the command "PAP 29 70" ("PAP 2* 70" where * is the value:
* = 7~9~B)
so that the reading of the NTP value is 22 ± 2 dBm.
Be care NOT to make Cable-loss between DECT tester and Target Set.
TP-ANT1 Follow steps 1 to 4 of (4).
5.Confirm that the B-Field Modulation is -350 ± 50/+350 ± 50 kHz/div using
datatype Fig31.
TP-ANT1 Follow steps 1 to 4 of (4).
5.Confirm that the frequency offset is < ± 20 kHz.
TP-ANT1 Follow steps 1 to 4 of (4).
5.Set DECT tester power to -88 dBm.
6.Confirm that the BER is < 1000 ppm.
Follow steps 1 to 4 of (4).
5.Confirm that Power RAMP is matching.
Procedure
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