No
Is normal on ly video ?
Is normal on ly audio?
Check TMDS line wave.
(R1215 ~ R1222/ R1226 ~ R1233)
Down load EDID data each port.
1. Check T V input mode.
(HDMI1 port support HDMI and DVI.
So if you inpu t D VI signal and PC audio from phone jac k,
You can hear PC audio. )
2. Unplug and plug HDMI ca ble.
(sometimes ESD surge occurred at HDMI port.)
3. Check HDMI Mute register. (0x 68, offset 0x37)
4. Check Audio- ou t channel mute reg ister (0x68 , offse t 0x32)
is appropriately enabled .
Check HDMI source . Change another so urce or cab le.
Is wave continuous?
1. Check H DMI rece iver’s status register. (0x60, offset 0x06)
- If the value is 0xf or 0x 8, it is n
o
rmal.
2. Check HDCP reg iste r. (0 x60, offset 0x32 )
- Enabl e bit 6: HDCP key loaded
- Enable bit 5: HDCP decryption active
- Enable bit 4: HDCP authen. attempted
No
No
Replace IC1200
Reset TMDS power down /on register .
- 0x60, of fse t 0x 3f : 0xf 7 => 0xff
Yes
Yes
Normal video ,
Normal aud io?
Yes
No
19. HDMI mode
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