Read Sony KDL-32R420A / KDL-32R421A / KDL-32R423A / KDL-32R424A / KDL-40R470A / KDL-40R471A / KDL-40R473A / KDL-40R474A / KDL-46R470A / KDL-46R473A Service Manual online
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TROUBLE SHOOTING
3) 6 times blinking (Backlight Error)
6-time blinking
Check PSU_BL_EN#
at CN201_Pin-14
on the Main board
Harness issue
NG
Symptom
improvement
improvement
Replace the harness
PSU to Main board
Change
Panel
Replace the
FFC(LVDS) Between
PSU and Panel
OK
FFC(LVDS)
issue
Check PSU_BL_ERR#
at CN201_Pin-13
on the Main board
<=0.7V
>=1.8V
NG
Replace PSU
OK
PSU issue
NG
<2.4V
>=2.4V
Change
Main board
Change
Main board
Check the harness
PSU to M/B
connection
NG
OK
Fix the harness
connection
Check the FFC(LVDS)
Between
PSU and Panel
connection
NG
OK
Fix the FFC(LVDS)
connection
OK
KDL-32R420A/421A/423A/424A, 40R470A/471A/473A/474A, 46R470A/473A(AEP/UK)
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