Panasonic VL-SV75 Series, Service Manual

Page: 54 / 102

11.1.1.2 When replacing BBIC and X'tal
■
Preparation:
1. PC setting refer to [8.1.1 Main Monitor Station] .
2. Supply AC 230V.
Note:
Test points: Refer to [14.1.2 Main Board (Bottom View)] .
No. Items Check Point Procedure
1 1.8 V Supply Adjustment CL437(BB1.8V) 1. Confirm that the voltage between test point CL437 and CL109 (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 BB1.8V executing command “VDD XX” (XX is the
value).
2 3.3 V Supply Confirmation CL438(BB3.3V) 1. Confirm that the voltage between test point CL438 and CL109(GND) is 3.3 V ±
0.2 V.
3 RF3.2 V Supply Confirmation CL436(RF3.2V) 1. Confirm that the voltage between test point CL436 and CL109(GND) is 3.2 V ±
0.2 V.
4 BBIC Clock Adjustment CL402(BCLK) 1. Confirm frequency between CL402 and CL109(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.
- 54 -