Sony KDL-43W755C / KDL-43W756C / KDL-43W800C / KDL-43W805C / KDL-43W807C / KDL-43W808C / KDL-43W809C / KDL-50W755C / KDL-50W756C / KDL-50W800C / KDL-50W805C / KDL-50W807C / KDL-50W808C / KDL-50W809C / KDL-55W755C / KDL-55W756C / KDL-55W800C / KDL-55W805C / KDL Service Manual ▷ View online
17
Troubleshooting
Muffin replacement
Product SW write
Recover?
Muffin issue
Yes
No
Muffin
replacement flow
eMMC erase
Data on eMMC
need to be erase
first before
changing Muffin
Board Issue
3.1-3 NO POWER – Muffin Replacement (Main Device)
18
Troubleshooting
3-2-1. LED Blinking: 2x (Main power Error)
3-2. LED BLINKING
BMX board (XM-A, XM-AT and XM-DT) only AC Adapter
2-time blinking
Check +19.5V_SS
at pin 15/17 of CN9000,
or JL9011
on B* Board
Voltage > 23V
Voltage < 23V
B* Board
Replace
LD* Board
LD* Board
OK
AC Adapter
NG
Troubleshooting References
19
Troubleshooting
Board Name
Board PWB (A side)
Detail
BMX
(CN9000)
BMX
(JL9011)
JL9011
CN9000
3-2-1. LED Blinking: 2x (Main power Error)
20
Troubleshooting
3-2-2. LED Blinking: 3x (DC Alert & Communication Error)
Note: Board Details refer Section 3
main page.
3-time blinking
Check +5.0V_MAIN
at L9015, 4.959V
<Voltage<5.285V?
F9013, IC9021,
etc (B* Board)
DC_ALERT
NG
OK
Speaker
Check
Speaker Impedance
at SP Connector,
8Ω±1.2Ω ?
Check Audio
+19.5V
at pin 16/18 of CN9000
on the B* Board
LD* Board
Check +19.5V
at Power Amp side
of F7751 on
the B* Board
F7751, IC7751
, etc (B* Board)
IC7751, etc
(B* Board)
AUDIO
NG
OK
NG
OK
NG
OK
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