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Only for training and service purposes
7. RGB-PC Video Trouble shooting guide
8. Analog RF Audio Trouble Shooting guide
Check P3300
Can you see the normal waveform?
NO
P3300 may have p roblem. Replace this Jack.
Check the input of Mstar(IC101).
Measure waveform at R234, R235
because it’s more easy to check.
Can you see the normal waveform?
YES
This board has big problem
because Main ch ip (Mstar) have some troubles.
After checking thoroughly all path o nce again,
You should decide to replace Mstar or not.
YES
Check input signal format.
Is it supported?
YES
Check AC cable for damage
For damage or open conductor
YES
Check RF Cable & Sig nal
Check Audio AMP outp ut
L5503,L5504,L5505,L5506
Y
Check TU3001 Pin1 (SIF Output)
Can you see the n ormal signal?
Y
Could you measure voltage of TU3001& IIC lines?
Are th ey all n ormal?
N
You should check power line & IIC lines.
N
You should replace TUNER.
Y
Check IC5600
Y
Replace IC5600
N
Replace L5503,L5504,L5505,L5506
N
Check th e input of Mstar (IC101).
Measure wavefo rm at C115, C116 because it’s mo re easy to
check.
Can you see the n ormal waveform?
Y
After checking audio signal line, you should decide to replace item or not.
N
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