Sharp LC-32HT2U Service Manual page 43

No video output from DVI input (INPUT 5)
DIGITAL mode
Are signals fed from DVI (SC1503) connec-
tor to input terminals H_RX0± (pins 8 and
9), H_RX1± (pins 11 and 12), H_RX2±
(pins 14 and 15) of IC1507 (TMDS-SW)?
YES
Are signals fed from IC1507 (TMDS_SW) to input termi-
nals H_RX0± (pins 54 and 55), H_RX1± (pins 58 and 59),
H_RX2± (pins 61 and 62) and H_RXC± (pins 50 and 51)
of IC1508 (HDCP_LSI)?
YES
Are R/G/B and CLK/H/V/Data Enable signals sent from
pins 92-96, 99-105,108-111, 114-117, 121-124, 119 and
127-129 of IC1508(HDCP_LSI)?
YES
Are digital video (LVDS) signals sent from pins 28-31 and
34-37 of IC3301 (Trident)?
YES
Check LCD_CONTROL PWB.
When using an old HDMI transmission device, some video formats cannot be selected or no sound is heard. Since this model conforms to the latest
HDMI standard, the HDMI transmission device does not recognize the data of the latest version correctly. It is necessary to upgrade its firmware.
Download the latest firmware from the website of each manufacturer, or contact the customer service center of each manufacturer.
[FRONT-END SECTION]
Digital broadcasting cannot be received.
Are US_TS_CLK/PKTSYNC/DATA sig-
nal supplied to pin (51), (59), (66) of
IC8601 respectively?
YES
Check the IC8101 and its peripheral cir-
cuits.
NO IS IC1505 (E2PROM) accessed with I2C
when connecting HDMI device and is
DDC_I2C_CLOCK/DATA data read out?
YES
Check IC1505 and peripheral cir-
cuits.Are cable connected
securely?
Check the setting of DVI Device.
NO Check IC1507 (TMDS_SW) and peripheral circuits.For INPUT4, pin 21
is Low and pin 22 is High.For INPUT5, pins 21 and 22 are Low and pin
23 is High.
NO Check IC1508 (HDCP_LSI) and peripheral circuits.
NO Check peripheral circuits of IC3301.
NO Are IF_OUT_P/N signal send from
pin (20), (21) of TU1101 respec-
tively?
NO
Check the TU1101.
6 – 10
Are signal fed from pins 25, 26, 27 (Ana-
log-R/G/B), and 28, 8 (H Sync/V Sync) of
input terminal (SC1503) to pins 226, 248,
233, 10, 11 of IC3301 (Video PROCES-
SOR)?
YES
NO
Check peripheral circuits of
IC3301.
Check LCD_CONTROL PWB.
YES Check IC8601 and its peripheral cir-
cuits.
LC-32HT2U
Analog mode
NO