Diode
Input voltageP300
4. Ctrl B/D
1. Confirm LED D17(flashing) ,13 lighting
2. If not CHECK OSC X1 output.
3. Check CTRL input voltage.
(CONNECTOR P300)
4. CHECK 3.3V, 5V,15V
5. Check IC 404 3.3V
IC 54 2.5V
OSC(X2
)
Probe
Touching
point
Check IC 54,404
DMM +
Check oscillating state.
DMM -
(normal 100 MHZ)(GND)
Be careful with physical shock.
3.3V2.5V
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