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Only for training and service purposes
10. HDMI Audio in Trouble Shooting guide
11. Audio out Trouble shooting guide
Check input signal format.
Is it supported?
Check JK800/JK801/JK802
Can you see the normal waveform?
Replace JK800/JK801/JK802
Y
N
Check AC cable for damage
For damage or open conductor
Y
Y
Check Audio AMP output
L5503,L5504,L5505,L5506
Y
Replace L5503,L5504,L5505,L5506
N
This board has big problem because Main chip (Mstar) have some troubles.
After checking thoroughly all path once again, You should decide to replace Mstar or not.
Check th e output o f Mstar(IC101).
Measure wavefo rm at R123, IC5600(Pin 23, 24).
because it’s mo re easy to check. Can yo u see the normal signal?
YES
NO
This bo ard has big problem because Main chip (MStar) have some tro ubles.
After checking thoroughly all path o nce again,
You should d ecide to replace Mstar or not.
Check Audio AMP outp ut L5503,L5504,L5505,L5506
Can you see the normal waveform?
NO
YES
After checking the Power & I2C & Reset of this chip,
you sho uld decide to replace this or not.
Check th e speaker output wafer P5600.
Can you see the normal waveform?
NO
YES
After checking audio signal line, you should decide to replace item or not.
Check th e connector & Speaker
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