One Point Repair Guide; Power Problem - LG SJ2 Service Manual

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)
IC307 IC307

ONE POINT REPAIR GUIDE

XL301 XL301
IC305 IC305
< MAIN board top view >
3-2