Table of Contents
Advertisement
2. SCH-E159 Flow Chart of Troubleshooting and Circuit Diagrams
2-1. LOGIC SECTION
2-1-1 No Power
Push PWR Button
Yes
U301 V_IN=
"H" Level?
U301 Pin 24=
+2.8V
U301 regulators
On state?
U301 Pin 9=
"H" Level?
Yes
U301 Pin 57=
"H" Level?
Yes
END
No
Yes
No
Yes
No
Yes
No
No
Check Battery,U301 and it's neighboring circuits
Check KeyPad circuit,U301 and it's neighboring circuits
Check Regulators Output,U301 and it's neighboring circuits
Check U301 and it's neighboring circuits
Check D300,U301 and it's neighboring circuits
2-1
Advertisement
Table of Contents
