23
TV Business Division
BM3J19 Board LCD Model
START
yes
Check POWER_ON
R830
or
P-on u-com #pin10
Is the voltage >3.0V?
Try AC Off and On after few minutes.
If #pin10 keep Low, change IC800.
If #pin10 goes High few seconds and downs to Low,
Check +12V_MAIN Line (from G board).
no
yes
Check 12V_MON
R822
Voltage.
Is the voltage >2.6V?
Check 12.7V_MAIN Line
(from G board).
no
yes
yes
Change IC800
no
Check DC_OFF_DET
R824
or
P-on u-com #pin3 (IC800)
is >3.0V?
Check P_ON_#1
CL813
or
P-on u-com #pin12 (IC800)
is >3.0V?
Change IC800
no
Continue next page…
Check VDD
C818
Voltage.
Is the voltage >3.0V?
Check 3.3V_STBY Line (C805, CN800 #9pin)
no
Check TYPE_DET
R810
Voltage.
Is the voltage 2.6
±
0.2V?
no
yes
Check OPWRSB
R820
Voltage.
Is the voltage 0V?
SOC
Muffin 3 problem
IC1000 # AL14 OPWRSB
no
yes
Check PGOOD_1
R818
Voltage.
Is the voltage >3.0V?
1.3 No POWER - DDCON/LDO
Check 1.0V DDCONs
(IC608, IC609, IC610)
no
yes
Type Detection Circuit problem.
Check TYPE_DET Line (R838, R839).
23
1.2 No Power u-com Failure
SYS SET
2019/04/19 01:55:00 (GMT+09:00)