Power that is inherent sparking blue gun, carefully observe changes sparking blue, the blue gun LB-PCB looked carefully pull down the line has been seriously damaged acceleration, this line after treatment, do not fight the ignition , but the fault remains.ERKservice manual download site

Careful analysis looked at the drawings, blue convergence of control over where the line is, after D6 interfaces BV measured voltage changes, tune while watching voltage changes, voltage changes, which makes a little excited, because it is not what IC7107 bad, D board failure, further testing is to detect IC7102, voltage measurements for each foot are normal, and there is a corresponding change in tone, while the posterior pole of the fault is it? ? ? Further investigation, D13 voltage is normal, and later find out is normal, with the substitution method to prove deflection CY-B and CY-R Swap is normal.ERKservice manual download site
 ERKservice manual download site

Then consider the deflection on the ground is normal? A test, open the eight resistors in parallel, replacement, return to normal.ERKservice manual download site