Rubin RB-19SE5 Service & Users manual
TP.VST59.P63 Trouble
杨兴建
数字签名人 杨兴建
DN：cn=杨兴建，c=CN-中
国，o=CVT，ou=电源，
email=xingjianyang@cvte
.cn
日期：2013.03.28 14:57:37
+08'00'
2013.03.
28
15:53:01
+08'00'
Shooting
—Power supply trouble
—Display trouble
—Audio trouble
—Function trouble
Author : Checked By ： Approved By ：
1.Power Board Diagram
AC input
EMI
filter
Rectifier
Power
convertor
Feed
back
ON/ 0FF
ADJ/PWM
Output
filter
19V/24
V output
LED
driver
LED
2.Power Board Service Guide
Non output, IR indicator light slake
Y
Check if 12V output normal
Check if FB1Open
Check EMI open or LN short
N
Check if EB1 voltage
about √2Vac
Y
Check if UB101 PIN5
voltage is about 15V
N
YY
N
N
N
Check the power
components
damage or not
Y
Check if 148open
Change short
components
Y
Change damaged
components
Change damage
resistors
Go to
check
Main
board
function
Check the rectifier
Y
Check if output short
N
Change
UB101
3.Power Board Service Guide
IR indicator light
up but backlight slake
Y
Y
Check if LED
output short
Y
Check if LED output cable
is connect correction
Y
Check ADJ&PWM&
ON/OFF Control signal
Y
Check is brightness is in dim
status
N
Check if UB801 PIN1
voltage is above 12V
Y
Check if RB809,
RB812,RB813 open
N
N
N
Correct
the LED
cable
Increase
brightne
ss
Remove
short status
Y
Change damage
resistors
Change UB801
Check
Main
board
function
4、Power Supply Trouble
Check E3 for 12V output
F1 damage or check
the power supply
Repair the abnormal circuit :
1.+5V—check UD11 and peripheral
components
2.+1.2V_VDDC –- check U4 and
peripheral components
3. +3.3V_STB—check U1
Repair the abnormal circuit :
1.M_5V—check Q4
2.2.5V–- check U6
N
N
N
Y
Check the test point :CD121 for
+5V , CD26 for +1.2V_VDDC , and
C13 for +3.3V_STB
Y
Power on , check C15 for M_5V ,
C33 for 2.5V output
Y
OK
5、Display Trouble（blurred screen）
Check if the cable is correct
blurred screen
and connected tightly
Change the cable
for panel
Change panel
Change or repair the damage
components in this part
N
N
N
Y
Check if the panel is OK
Y
Check if the output circuit from
V59/ V29/ V39
to the jack are normal
Y
Check the circuit of
V59/ V29/ V39
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