Read Sony KDL-32R400A / KDL-32R420A / KDL-40R450A / KDL-40R470A / KDL-46R450A / KDL-46R470A Service Manual online
KDL-32R400A/420A, 40R450A/470A, 46R450A/470A(PA)
23
TROUBLE SHOOTING
2) 3 times blinking (Main Board Error)
3-time blinking
Check PWM_5V at
L202 pin-2 on Main board
(4.75~5.25V)
U202, L202, etc
Change Main board
Change Speaker
Check SYS_3.3V
at U204_Pin-6
on Main Board
(3.135~3.465V)
Check the speaker
Impedance at the
SP Connector
(8ohm+/-15%)
U204, etc
Change Main board
Demo, Audio, Tuner, etc
Change Main board
DC_ALERT
NG
OK
NG
OK
AUDIO
NG
OK
Check the harness
M/B to Speaker
connection
NG
OK
Fix the harness
connection
Click on the first or last page to see other KDL-32R400A / KDL-32R420A / KDL-40R450A / KDL-40R470A / KDL-46R450A / KDL-46R470A service manuals if exist.