![background image](http://html.mh-extra.com/html/haier/hl42b-b/hl42b-b_service-manual_136767053.webp)
54
First, check cables which connect with PSU
,
then check as follows
1) Check input voltage
voltage: +5VSB
→
POWER ON(5V)
→
+12V
→
5V
connector: CN4(P1)
→
CN4(P13)
→
CN5(P1,P2,P3)
→
CN4(P2,P3,P4,P5)
→
CN4(P12)
→
CON4(P14)
2)Check output voltage
voltage: Vblon
→
+5V
→
Vipwm
connector: CN4(P12)
→
J28(P26-P30)
→
CON4(P14)
CN4 CN5
ON
-
2.0
-
5.0
V
On/Off Control
Voltage
OFF
V
BLON
-
0
-
0.8
V
MAX
3.0
3.15
3.3
V
Maximun duty ratio
Internal PWM
Control Voltage
MIN
V
IPWM
V
SEL
=L
0
-
V
Minimum duty ratio
Содержание HL42B-B
Страница 8: ...8 3 2 2 Connector definition Main board connector ...
Страница 32: ...32 2 Video It include Auto Color and Color Temperature ...
Страница 34: ...34 Channel menu includes 5 Function Range Scan Single RF Scan Factory Scan ...
Страница 54: ...55 CN4 CN5 J28 10 1 3 No sound ...
Страница 60: ...61 Sincere Forever ...