Sharp LC-32WD1E/S/RU - Page 51

VIDEO PATH CHECK
are VDI_D(x) signals arriving to PNX5010E (D040) ?

no
check CPLD (D080) power levels, peripherals, CPLD code
v yes
are VDO_D(x) signals and CLK signal arriving to LVDS transmitter
D061 ?

no
PNX5010E (D040) is not functioning normal, check PNX SW,
DDR-SDRAM, XTAL, power supply and other peripheral
v yes
are LVDS signals arriving to common mode chokes (Z060 - Z061 -
Z062 - Z063 - Z064) ?

no
check pin32 of D061 (power_down?) => check D063 signals and
peripherals, check other LVDS transmitter peripherals
v yes
are LVDS signals arriving to LVDS connector (X060) ?

no
check common mode chokes (Z060 - Z064)
v yes
is LVDS_POWER available at the LVDS connector (X060) ?

no
Is +12V available ? NO => check PSU
YES => check DC/DC converter, check panel_power_enable signal
and peripherals
v yes
are LVDS power and LVDS signals available on
the LCD control unit ?

no
check LVDS wiring
v yes
Is backlight ON ?

no
GO TO backlight Faillure
v yes
replace LCD control unit
LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
6-20