BD-HP17U
4 – 10
The power does not come ON from power OFF status.
Is AT_5V line working normally?
Check the circuit of AT_5V.
Check the function of Microcomputer in IC2503 and its peripheral
circuits.
When the Power key (S1201) is pressed, is pin (73) of IC2503
at "L" level?
YES
NO
NO
NO
Is pin (57) of IC2503 (STANBY_CTL) at "H" level?
Is pin (74) of IC2503 (MAIN_P-CON) at "H" level?
Check the line between S1201 and IC2503.
NO
Check the peripheral circuits of IC2503.
YES
YES
Is pin (59) of IC2503 (DRIVE_P-CON) at "H" level?
NO
Check the peripheral circuits of IC2503.
YES
Are DRIVE_12V and DRIVE_5V output?
NO
Check the DRIVE_12V and DRIVE_5V circuits
(Q9014, Q9012, etc.).
YES
Check or replace the peripheral circuits of IC2503.
YES
FLOW CHART No. 3
To Next Page
Loading...
