External Monitor No Display - Prestigio CAVALIERE 141 Technical & Service Manual

Prestigio Cavaliere 141

8.5 External Monitor No Display

Symptom:
The CRT monitor shows nothing or abnormal color, but it is OK for LCD.
+3V
P
7
VGA_DDDA
VGA_DDCK
+5V
VGA_VSYNC
U505
VGA_HSYNC
North Bridge
SiS650
VGA_BLUE
VGA_GREEN
VGA_RED
RP502
75*4
R41 2.2K
R62 2.2K
G
S
Q9
G
2N7002
S D
G
Q10
2N7002
S D
Q13 G
2N7002
S D
CP502
47P*4
U516
P
16
CRT_IN#
South Bridge
+5V
SiS961
Q14
L10
2N7002
D
L14
L12
CON_VSYNC
L11
CON_HSYNC
FA501
CON_BLUE
1
8
2
7 CON_GREEN
6 3
CON_RED
FA1
5
4
CP503
47P*4
108
Technical Service Manual
+3V
R555
R552
100K
1K
C583
J504
100P
P
14
CON_DDDA
12
CON_DDCK
15
14
ANALOG ANALOG
13
DISPLAY DISPLAY
3
2
1
CP1
47P*4
CRT
CRT