5
Main board
Video board
Power Supply
UC3842
AC in 90 to
264 VAC
180 V
80 V
+/- 15 V
+13 V/-15V Audio
12V
UVLO
5V
Heater
GB04K
Microcontroller
ST7275J4
DIP42 Shrink
H-FLY
Horizontal
Step Down
Converter
Output
BUH1015
Vertical
Output
TDA9309
Deflection
Prosessor
TDA9109S/N
shrink 32
HV-
generator
UC3843
Heater
R
R out
G
G out
B
B out
G1, G2,
Dyn foc,
Stat foc
27 kV
G2, Dyn foc,
Stat foc
BCL
TDA4886
R in
G in
B in
V blank
input clamp
H blank
output clamp
STV9427
H
sync
V
sync
H
blank/clamp
V
blank/clamp
G2
#2 Lin
#6 S-cap
Vert
yoke
Hor
yoke
V&H sync
K
e
y
b
o
a
r
d
SDA
ON/OFF
"sof
t"
I C
2
I C
2
I C
2
R
G
B
FBLK
H&V sync
V-fly
Vertical
adjust
and
control
RESET
SUSPEND
POWER
ON
LM2403
NATIONAL
PHILIPS
CONTRAST
BRIGHTNESS
XRA
Y
SCL
INT
USB_ON
KEY_PAD
+15V
T
o
U
S
B
H-drive
AUDIO + P.A.
LM4832 (National)
TDA7499 (SGS)
- Volume&Tone control
- 3D Sound
- 2 x 3 W audio output
POW_LED
+5V
SDA
SCL
PRE_HEA
T
PWR_UP
BLOCK DIAGRAM
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