Sony KD-75X7800F Service Manual page 29

2018/08/13 23:26:25 (GMT+09:00)
2.2 LED Blinking: 3x (Audio Error)
BCH-PWB
(1) VDD-GND short check
Measure impedance between VDD and GND at
capacitor C3244.
impedance is <100Ω → NG
(2) +3.3V_Audio short check
Measure impedance between +3.3V and GND at
R3242(1).
impedance is <100Ω → NG
(3) Fuse open check
Measure impedance of fuse
F3200 5A (12.5V or 19.5V)
fuse open → NG
C3244
R3242
F3200
(4) POWER_AU check
Measure voltage at capacitor C3244.
voltage is < → NG
(Supplementary
information)
29
SYS SET