Sony GN3TR - Page 24

XBR-49/55/65/75X900E
TROUBLE SHOOTING
FLOW
1-3. NO POWER DDCON/LDO
DDCON CHECK
24
Check Enable
IC600 #pin1
Is voltage >2.5V?
Change IC600
Change D600
no
no
START
yes
Change DDCON
IC601
Check Vcc voltage
C602
Is voltage >3V?
yes
Check
D600
Is diode alive?
no
yes
Check +3.3V_STBY.
G* board or IC403
Change D601
no
Check Vcc voltage
C602
Is voltage >4V?
yes
Check
D601
Is diode alive?
no
yes
Check +5V_MAIN DDCON (IC402)
Check IC402 Vcc voltage
C423
Is voltage >12V?
no
Is IC600 mounted?
yes
no
yes
IC Ref Voltage supply
IC601 +1.5V_DDR