Troubleshooting - Sony HT-RT4 Service Manual

HT-RT4/RT40
1. "PRTCT" is displayed on OLED display after turning the power on
Note: Please remove USB (removable device) before troubleshooting.
"PRTCT" is displayed on the
OLED display after turning the
power ON.
Yes
"PRTCT" is displayed after
removing Bar speaker (FRONT L,
FRONT R, CENTER speakers)
and Surround speaker (SUR L,
SUR R speakers) and turning the
power ON.
No
"PRTCT" is displayed after
plugging Bar speaker (FRONT L,
FRONT R, CENTER speakers)
and turning the power ON.
No
"PRTCT" is displayed after
plugging Surround speaker
(SUR L, SUR R speakers) and
turning the power ON.
2. The video of HDMI is not displayed during USB mode
Check MAIN board (RT4) /
EG4 MAIN board (RT40)
IC3200 pin 4 is 5V.
Yes
Replace complete MAIN
board (RT4) / EG4 MAIN
board (RT40).
16
SECTION 4

TROUBLESHOOTING

Remove CN1001 from
MAIN board (RT4) / EG4
Yes
MAIN board (RT40) and
check "PRTCT" is
displayed.
No
Check and replace the
loudspeaker in subwoofer.
Check and replace the
Yes
loudspeaker in Bar
speaker.
Yes
Check and replace the
Surround speaker.
Check MAIN board (RT4) /
No
EG4 MAIN board (RT40)
IC3200 pin 1 is 3.3V.
Yes
Check MAIN board (RT4) /
EG4 MAIN board (RT40)
IC3200 pin 5 is 7.4V ~ 8V.
Yes
Replace IC3200 on MAIN
board (RT4) / EG4 MAIN
board (RT40).
Replace MAIN board
(RT4) / EG4 MAIN board
Yes
(RT40) IC1000 and
IC1002 and check
"PRTCT" is displayed.
No Refer to "Power is not turned
on" on page 18.
Replace MAIN board (RT4) /
No
EG4 MAIN board (RT40)
diode (D3200).
Replace complete
Yes
MAIN board
(RT4) / EG4 MAIN
board (RT40).