Nokia 447PRO Service Manual page 37

Power Supply
UC3842
AC in 90 to
264 VAC
K
e
y
b
+5V
o
POW_LED
a
r
d
SDA
SCL
T
o
+15V
U
S
B
Main board
Video board
R in
G in
B in
V blank
input clamp
H blank
output clamp
BLOCK DIAGRAM
180 V
80 V
+/- 15 V
+13 V/-15V Audio
12V
5V
Heater
RESET
UVLO
Microcontroller
ST7275J4
DIP42 Shrink
KEY_PAD
CONTRAST
BRIGHTNESS
INT
H&V sync
USB_ON
R out
TDA4886
G out
PHILIPS
B out
2
I C
R
G
B
STV9427 FBLK
2
I C
Deflection
Prosessor
TDA9109S/N
shrink 32
V&H sync
#2 Lin
#6 S-cap
PWR_UP
G2
2
I C
SDA
SCL
BCL
LM2403
NATIONAL
5
Vertical
Vertical
adjust
and
Output
control
TDA9309
V-fly
Step Down
H-drive
Converter
Horizontal
H-FLY
Output
BUH1015
AUDIO + P.A.
LM4832 (National)
TDA7499 (SGS)
- Volume&Tone control
- 3D Sound
- 2 x 3 W audio output
HV-
generator
UC3843
27 kV
G2, Dyn foc,
Stat foc
Heater
R
G
B
G1, G2,
Dyn foc,
Stat foc
Vert
yoke
Hor
yoke