Akira L2655 Schematic
AKIRA
AKIRA
AKIRA
AKIRA
• SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
• L 2655
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Power category troubleshooting
-- Display category
-- Display category
-- Display category
-- Display category
-- Display category
-- Display category
-- Display category
-- Display category
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Audio category troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
-- Function categories troubleshooting
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
CV109H_V2.0 Common
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
Standby, the board test points TP11 whether 5 V?
main board test point TP5 if have 3.3V
，
test point
TP13 if have 1.25V
？
Normal turn on
Power chip LDO (U1)
whether the work , output
voltage whether 2.5V, or
load short-circuit
After turn on
，
test point TP2 if have
5V ,test point TP2 if have 5V
，
test
point TP9 if have 2.5V
Y
N
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
Figure 1 Power category
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
troubleshooting
Y
N
OK
check U3 U10
power network
AC input is normal
The replacement
of power
N
check power module
Y
OK
screen noise or
screen black
（
but backlight is on
）
screen driver wire if correct
connect well if OK
change LCD if normal
change screen
driver wire
Y
N
Change LCD
N
Y
check output network
J8 screen driver socket part if normal
Y
check U15
power and clock circuit
IC LVDS output pins if
short，open
Figure 2 shows that
Figure 2 shows that
Figure 2 shows that
Figure 2 shows that
part (
part (
part (
part ( Huaping
Huaping
Huaping
Huaping )
)
)
)
N
Check the power VCCPanel LCD whether 5V
software if match
upgrade matching
software again
N
Change and fix
this part circuit
screen black
Check Inverter output voltage
whether normal
？
check the Inverter power
J5 ’ s 1 pin output voltage
whether 5V
？
check & fix power circuit
N
N Y
Y
check & fix this part control
circuit
Inverter
or connected wire
doesn't work
Figure 3 shows that some
Figure 3 shows that some
Figure 3 shows that some
Figure 3 shows that some
(blank screen)
(blank screen)
(blank screen)
(blank screen)
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