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Sanyo DP32640 Troubleshooting Manual page 4

2010 models
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Repair Flow Chart: Trouble Condition
Green Power LED and LCD backlights are on, but no video or OSD.
LCD Backlights are ON.
But, TV has NO VIDEO or OSD.
On Main Bd.:
Is the 12V supplied
from Pwer Bd.?
(see TABLE*1.0)
yes
Is power to T-CON supllied
from Main Bd.?
(see TABLE*2.0)
yes
Is LVDS Clock outputed?
(see TABLE*3.0)
yes
Confirm LVDS cable connection.
And check for video/OSD again.
T. Cnt. Bd. or LCD Panel is not working.
1st: Replace "T. Cnt. Bd. & LVDS Cable".
If T. Cnt. Bd. & LVDS Cable does not
correct problem, then:
2nd: Replace "LCD Panel"
(TABLE *1.0) Main Bd.: 12V Test Points
26" Models
32" Models
DP26640-00
N8ME
DP32640-00
DP26640-01
N8MF
DP32640-01
DP26640-02
N8MG
DP32640-03
DP26640-04
N8MH
(TABLE *2.0) Main Bd.: "T-CON Power supply" Test Points
26" Models
32" Models
DP26640-00
N8ME
DP32640-00
DP26640-01
N8MF
DP32640-01
DP26640-02
N8MG
DP32640-03
DP26640-04
N8MH
(TABLE *3.0) Main Bd.: "LVDS Clock" Test Points
26" Models
32" Models
DP26640-00
N8ME
DP32640-00
DP26640-01
N8MF
DP32640-01
DP26640-02
N8MG
DP32640-03
DP26640-04
N8MH
no: 0V
Replace "Power Bd."
and "Wire harness".
no: 0V
Main Bd. is not working.
Replace "Main Bd."
no: 0V or 1.1V constant
Main Bd. is not working.
Replace "Main Bd."
If the clock output is OK, the
Main Bd. is normally OK, but can
not be 100% sure. If the T Con
Bd. & LVDS do not the correct
problem, please try the Main,
before ordering a panel.
12V on Main Bd.
Main K8C "pin 8"
N8LE
N8LF
N8LH
12V on Main Bd.
Main K5LV "pin 23"
N8LE
N8LF
N8LH
LVDS Clock on Main Bd.
K5LV pin #11: Clock -
N8LE
K5LV pin #12: Clock +
N8LF
N8LH
note: The bandwidth of the oscilloscope and probe must be
at least 100 MHZ or higher to check if the clock pluse exists
page 3
Confirmation Voltage
12 V
Confirmation Voltage
12 V
Confirmation Voltage
Waveform will be
200 - 450 mV
74.25 MHz
range = 10-20ns/div

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