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3-2

ONE POINT REPAIR GUIDE

1. NO POWER PROBLEM

No power problem occurs when you power on the unit.

1-1. Solution

Replace XL301, IC307, IC305.

1-2. How to troubleshoot (Countermeasure)

1) Check XL301(Crystal).

 If it does not oscillate, replace XL301.

2) Check IC307(Reset IC).

 If its output voltage is not more than +3 V, replace IC307.

3) Check IC305(DSP IC).

 After Power is ON, if the pin153, 154, 155, 156 of IC305 is no signal, replace IC305.

But, the new flash IC need to write program.

1-3. Service hint (Any picture/ Remark)

< MAIN board top view >

IC307

XL301

IC305

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