Sony SA-WRT4 - Page 19

HT-RT4/RT40
19
5. USB cannot be detected
USB cannot be detected.
Yes
Yes
Check IC3000 pin 1 is 5.1V.
Yes
Check coil (L3000) pin 1 and
pin 3 are shorted to ground.
Yes
Check IC3000 pin 4 is 3.3V.
YesYes
Check IC3000 pin 5 is 5.1V.
Refer to "Power is not turned
on" on page 18.
Replace complete MAIN
board (RT4) / EG4 MAIN
board (RT40).
Replace complete MAIN
board (RT4) / EG4 MAIN
board (RT40).
Replace IC3000 on MAIN
board (RT4) / EG4 MAIN
board (RT40).
No
No
No
No
Check that there is no
abnormality on USB board
connector (CN7000).
Replace connector
(CN7000) on USB board.