Sharp LC-32WD1E/S/RU - Page 47

NO picture on display via EXT-7 (HDMI2) input
No picture on LCD screen when EXT-7 (HDMI2) input source
selected
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly ? ==> See operation manual and set "INPUT SOURCE" to "EXT7"
2) Is MENU-PICTURE-Contrast/Brightness set to "MIN" ? ==> Set it to appropriate level
3) Check connection to external device ==> Connect it correctly as per the operation manual for the device
4) Check if supported format is connected to EXT7. ==> (720p, 1080i, …)
5) Is correct video signal type applied from external HDMI device ? ==> Confirm the type (it should be "RGB", "YCbCr 4:4:4" or "YCbCr 4:2:2")
6) Is correct color matrix applied from external HDMI device ? ==> Confirm the type (it should be "ITU601" or "ITU709")
v yes
Are the HDMI signals BRX(+-) present on pins 1-12 on connector
X073 on main PCB ?

no
Check HDMI connector X073 and external connection.
v yes
Are the HDMI signals PBRX(+-) present on both sides of the
commonmode chokes Z0712, Z0714, Z0715 and Z0716 ?

no
Check commonmode chokes.
v yes
Are I2C signals (BRX_DDC_SDA and BRX_DDC_SCL) present on
EDID eeprom M24C02 (D0705) pins 5 and 6 ?

no
Check peripheral circuits on BRX_DDC_SDA/SCL and
PBRX_DDC_SDA/SCL signals.
v yes
Is Hirate_MCLK 13,5MHz clock present on R0368 ?

no
Check PNX5010E (D040) SW and its peripherals (power supply,
XTAL,….)
v yes
Is TDA9975AEL/10(D030) Hirate_CLK clock there on R0325?,
are the CS (R0328), HS (R0330) and VS (R0331) signals there ?
AND are the VPA(x), VPB(x) and VPC(X) signals toggling on the
network resistors R030-R034 and on R0310-R0318?

no
TDA9975AEL/10 (Hirate) (D030) is not functioning normal,
check PNX SW, check if TM_SCL and TM_SDA are functioning
normal and check other peripherals (power supply,…) of D030
v yes
GOTO VIDEO PATH CHECK
LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
6-16