Read Sony DAV-S300 (serv.man2) Service Manual online
3
1. Troubleshooting at Start-up
(1) Stand-by Mode
(a) Voltage supply for microcomputer
5.6V for microcomputer is output from power circuit and supplied to audio micro
computer (IC903) when connecting AC plug to an outlet.
(b) Output of Reset signal
Reset signal from reset IC(IC902) lets audio micro computer (IC903) start up.
(c) Setting of Stand-by Mode
Power LED illuminates in red when audio microcomputer starts up normally and moves in
Stand-by Mode. Audio microcomputer detects key / remote input and performs LCD control.
The system changes to Operation Mode when Wake-up input (key/ remote) is recognized.
(Repair Know-how)
In case that audio microcomputer doesn’t start up, confirm the fuse (F901) on Power
board. Also, confirm input of reset signal (IC903 12 pin).
Click on the first or last page to see other DAV-S300 (serv.man2) service manuals if exist.