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ⓒ
2020 LG Electronics. Inc. All right reserved. Only for training and service purposes
Established
date
Standard Repair Process Detail Technical Manual
Revised
date
A18
Error symptom
Content
Check power input voltage and ST-BY 7.8V
B. Power error _No power
SET Model
Power P/N, Name
65UN7000
COV36589101, POWER BOARD
all condition meets, Power Board OK.
SIGNAL TYPE
COMMENTS
MAIN OUTPUT
Logic level low
0.6V≥low power≥-0.3V
OFF
Logic level high
5.5V≥high power≥2.0V
ON
Open
---
OFF
2.PWON/BLON/PDIM SIGNAL CHARACTERISTICS
1. CN102 (110V-240V)
AC INPUT CHECK
3. ADIM SIGNAL CHARACTERISTICS
SIGNAL TYPE
COMMENTS
NOTE
Logic level low
0V
10KHZ MIN FREQUENCY
Logic level high
3V
4. INPUT CHARACTERISTICS
PARAMET
ER
SYMBOL
MIN
TYP MAX UNIT
REMARK
INPUT
VOLTAGE
Vin
--
70
--
V
BLON=3.3V
,
PDIM =100% RL=2 String Lamp
INPUT
CURRENT
Iin
--
1.7
--
A
Vin=70V, BLON=3.3V PDIM =100% RL= 2 String La
mp
INPUT
POWER
Pin
--
120
--
W
Vin=70V, BLON=3.3V PDIM =100% RL=2 String Lam
p
PDIM/ADIM
Duty
5
100
%
100% Maximum duty maximum brightness
Frequency
100
300 1000
HZ
PDIM(PWM Dimming)
--
--
--
ADIM(Analog (DC)dimming)
EFFICIENCY
η
85
--
--
%
Vin=70V, BLON=3.3V PDIM =100% RL=2 String Lam
p
CN102 (AC input)
CN201
CN101
A18