Backlight Power Check (Details) - Sharp LC-52XS1E Service Manual

LC-52XS1E/RU/LC-65XS1E/RU

[3] Backlight POWER Check (details)

BACK LIGHT POWER FAILURE
1. SUB-POWER-UNIT (1/2/3) (Backlight POWER) power supply input • • • AC1, AC2, AC3terminal • • • He is 220VAC.
2. SUB-POWER-UNIT (Backlight POWER) Power supply output • • • LA1/2/3terminal, PS1/2/3 terminal is as follows.
SUB-POWER-UNIT (1/2/3)
1pin 2pin
LA1/LA2 27V 27V
LA3 27V 27V
1pin 2pin
PS1 BU5V BU5V
PS2 BU5V LED_ON
PS3 BU5V LED_ON
3. The input-and-output power supply of POWER-DISTRIBUTION-UNIT • • • The voltage of LA1/2/3, CN4, CN1-CN8 terminal is as follows.
POWER-DISTRIBUTION-UNIT
1pin
LA1/LA2 CN1/2 27V
LA3 CN3 27V
1pin 2pin 3pin
CN4 20V_ 20V_ 20V_
R R R
15pin 16pin 17pin
G G G
1pin 2pin
CN1 20V_R G
CN2 20V_R G
CN3 20V_R G
CN5 20V_R G
• • •
20V_R G
CN7 20V_R G
CN8 20V_R G
3pin 4pin 5pin
G G 20V
27V G G
3pin 4pin 5pin
LED_ON OVP G
OVP 27V 20V
OVP 27V 20V
2pin 3pin 4pin
27V G G
27V 27V G
4pin 5pin 6pin 7pin
20V_ 20V_ G G
R R
18pin 19pin 20pin 21pin
G G G G
3pin 4pin 5pin 6pin
G G 27V_G 27V_B
G G 27V_G 27V_B
G G 27V_G 27V_B
G G 27V_G 27V_B
G G 27V_G 27V_B
G G 27V_G 27V_B
G G 27V_G 27V_B
6pin 7pin 8pin
20V G G
G 20V 20V
6pin 7pin 8pin
27V 20V G
G — —
G — —
5pin 6pin 7pin
20V 20V G
G G 20V
8pin 9pin 10pin
27V_G 27V_G 27V_G
B B B
22pin 23pin
G G 52/65
POWER-DISTRIBUTION-UNIT1
POWER-DISTRIBUTION-UNIT1
POWER-DISTRIBUTION-UNIT1
52/65
• • •
52/65
65
4 – 4
9pin 10pin
G — 52/65
G G 65
9pin 10pin 11pin
27V 20V G
— — —
— — —
8pin
G 52/65
20V 65
11pin 12pin 13pin
27V_G 27V_G 27V_G
B B B
52/65
52/65
52/65
52/65
52/65
65
14pin
27V_G 52/65
B