Panasonic KX-TCD420GS Service Manual page 45

Items
Adjustment
(A) 2.65V Supply
Confirmation
(B) 4.0V Supply
Confirmation
(C) VBACK Status
Confirmation
(D) BBIC
* Confirmation
(E) BBIC Clock
* Adjustment
Point
1. Confirm that the voltage between J101 and GND is 2.65V ± 0.2V.
-
1. Confirm that the voltage between TP11 and GND is 4.0V ± 0.2V.
-
1. Confirm that the voltage between J102 and GND is 0V ± 0.4V.
-
1. BBIC Confirmation (Execute the command "getchk").
-
2. Confirm the returned checksum value.
Connection of checksum value and program number is shown
below.
1. Execute the command "deactmac".
TP15
2. Execute the command "conttx".
3. Input Command "rdeeprom_00_00_02", then you can confirm the current value.
4. Adjust the frequency of TP15 executing the command "setfreq 00 xx (where xx is the
value)" so that the reading of the frequency counter is 10.368000MHz ± 3Hz.
Procedure*
41
Check
Replac
Parts
C40,C41
C43,C44
C32,C33
C37,C
D4,C36,
R61,R62
C72,D14
D9
IC8,C53,
C55,C56
R78,R77
R74,D9,
Q12
IC8,C53,
C55,C56
R78
IC8,C53,
C55,C56
R78,L2,
C95