Sharp LC-32WD1E/S/RU Service Manual page 47

LC-32WD1E/S/RU, LC-37WD1E/S/RU, LC-42WD1E/S/RU, and LC-32/37/42WT1E
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
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")
Are the HDMI signals BRX(+-) present on pins 1-12 on connector
X073 on main PCB ?
Are the HDMI signals PBRX(+-) present on both sides of the
commonmode chokes Z0712, Z0714, Z0715 and Z0716 ?
Are I2C signals (BRX_DDC_SDA and BRX_DDC_SCL) present on
EDID eeprom M24C02 (D0705) pins 5 and 6 ?
Is Hirate_MCLK 13,5MHz clock present on R0368 ?
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?
GOTO VIDEO PATH CHECK
on the remote control set up correctly ? ==> See operation manual and set "INPUT SOURCE" to "EXT7"
yes
yes
yes
yes
yes
yes
Check HDMI connector X073 and external connection.
no
Check commonmode chokes.
no
Check peripheral circuits on BRX_DDC_SDA/SCL and
PBRX_DDC_SDA/SCL signals.
no
Check PNX5010E (D040) SW and its peripherals (power supply,
no
TDA9975AEL/10 (Hirate) (D030) is not functioning normal,
check PNX SW, check if TM_SCL and TM_SDA are functioning
no
normal and check other peripherals (power supply,...) of D030
6-16
XTAL,....)