Changhong Electric PT4216 Service Manual page 27

X P 9 0 5
1 t h p i n
4.1.5、A12V power branch
PDP_D12V
XP900
5th pin
4.2
The Pin Voltage of regulator on Main Board
position type
UP7 LM1117-1.8V
UP1 LM1117-3.3V
U913 4805F
U923 4805F
U916 78M08
U403 LM1117-1.8V
U915 4805F
U903 LM1117-2.5
U914 LM1117-1.8V
U900 LM1117-3.3V
4.3 Main Components and Socket Locations and Definitions on main board module:
+ 5 _ A N G
U 9 1 5
T A 4 8 0 5 F
+ 5 V
+12V_DC
+12V_3A
PIN1(V)
0
0
6
6
12
0
6
0
0
0
U 3 0 9 （ 1 6 t h p i n ) , U 3 0 5 （
2 6 t h p i n ） , U 3 0 7 （
1 6 t h p i n ） a n d e a c h
（
c i r c u i t b i a s s u p p l y
U 3 0 8 （ 1 6 t h p i n ) , U 3 1 1 （
7 t h 、 8 t h p i n ）
（
p o w e r s u p p l y
SCOL, SCOR audio
output circuit power
supply
U916
TA4808F
PIN2(V) PIN3(V)
1.8 5
3.3 5
0 5
0 5
0 8
1.8 3.3
0 5
2.5 5
1.8 3.3
3.3 5
27
1 8 t h , 2 2 t h ,
1 6 t h p i n ) , U 3 0 6
p o r t a u d i o i n p u t
1 4 t h p i n ) , X P 9 0 0
a n d G P I O p o r t p u l l - u p
U5 TDA9178T
20th pin
PIN4(V) PIN5(V)
1.8
3.3
1.8
0
2.5
1.8
3.3