XOCECO LC-42HW36, Руководство по обслуживанию

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5.6 No picture of HDMI
Note: in order to display HDMI picture properly (especially when use the DVD with HDCP information),
first, make sure to flash write NA01, NA02, NA03 (DDC chip of HDMI interface) accurately, and the bus
line between NA01, NA02, NA03, NA04 and HDMI is well. Second, make sure that HOTPLUG circuit (it’s
high voltage when play normally) and HDMI control signal are well (NA04 pin21-23, when switch to a
certain HDMI channel, the corresponding pin is high voltage, while other pins are low voltage).
5.7 No sound of HDMI channel
Note: in order to display HDMI audio properly (especially when use the DVD with HDCP information),
first, make sure to flash write NA01, NA02, NA03 (DDC chip of HDMI interface) accurately, and the bus
line between NA01, NA02, NA03, NA04 and HDMI is well.
Check if NA04 has digital signal output
Check if NA04 has digital
signal input
Check the peripheral circuit of
NS01, crystal and power supply
Yes No
Check the periphery of NA04 (IIC, HOTPLUG
circuit, NA04 pin21-23 HDMI channel switch
control signal and DDC circuit)
Check if the pin19, 20 22 of N103
have IIS signal input
Check N103 and
the periphery
No Yes
Check the circuit between
HDMI socket and NA04
Check the peripheral circuit of NA04 (IIC, HOTPLUG and
NA04 pin21-23 HDMI channel switch control signal)
Yes No