Sony KD-55A8F Service Manual page 20

2018/03/16 22:32:44 (GMT+09:00)
1.3 No Power DDCON/LDO
DDCON check
START
Check IC402 Vcc voltage
C423
Is voltage >12V?
Check Vcc voltage
C602
Is voltage >4V?
Check Enable
IC600 #pin1
Is voltage >2.5V?
Change DDCON
IC601
no
Check Vcc voltage
C602
Is voltage >3V?
yes
no
Check
Is diode alive?
yes
no
yes
no
Is diode alive?
yes
no
D601
yes
Check +5V_MAIN DDCON (IC402)
Change IC600
BM2A Board Model
IC Ref Voltage supply
IC601 +1.5V_DDR
no
Check
D600
yes
Change D601
20
Change D600
Check +3.3V_STBY.
G* board
(Supplementary
20
information)
SYS SET