Sharp LC-26D4U Service Manual page 46

LC-26D4U
LC-32D4U
LC-37D4U
TROUBLE SHOOTING TABLE
1 Tip HDCP_LSI
Are signals supplied from HDMI (SC1901)
connector to input terminals H_RX0 ±
(pins 44 and 43), H_RX1 ± (pins 48 and
47), H_RX2 ± (pins 52 and 51), and
H_RXC ± (pins 40 and 39) of IC1912
(HDCP_LSI)?
YES
Are HDMI_Y/Pb/Pr and HDMI_H/V signals
sent from pins (26), (28), (24), (20) and
(22) of AV unit connector (SC5701)
respectively?
YES
Are HDMI_Y/Pb/Pr and HDMI_H/V signals
supplied to pins (8), (6), (10), (14) and (12)
of MAIN unit connector (SC3201)
respectively?
YES
Are HDMI_Y/Pb/Pr and HDMI_H/V signals
supplied to pins (3), (7), (27) of IC3703
(L.P.F.) and pins (4) and (12) of IC3701
(SYNC_SELECTER) respectively?
No HDMI input picture
Is IC1913 (E2PROM) accessed by I2C to
NO
read out DDC I2C CLOCK/DATA when
HDMI equipment is connected?
NO
Check IC1913 and the peripheral
circuits.
YES
Is there HDMI_RST signal output at
output pin (6) of IC1914 (EXPANDER)?
NO
Check IC1914 and the peripheral
circuits.
NO Check IC1912 (HDCP_LSI) and the
peripheral circuits.
NO
Check FD harness for disconnection.
NO
Check IC3703, IC3701 and the
peripheral circuits.
46
(Continued)
YES
Check HDMI equipment settings.
YES
Check IC1912 and the peripheral
circuits.