55LW5600 Power Supply Drawing
51
(1)
P-DIM1 (Digital Dimming) Global Pin 22
can vary
according to incoming video IRE level, OSD Backlight
setting and room light condition.
0.2V 0% to 3.3V 100% and the Intelligent Sensor.
Output from the Video Processor IC900.
SMPS TEST 1: To Force Power Supply On.
Disconnect P502 on Main board.
(A) Jump pins 9, 10, 11 or 12 (STBY_3.5V) to pin 1. Test Voltage Outputs 12V, 24V to
Main and 56V to the Panel LEDs. Remove AC power. Leave the jumper in place.
No Backlights at this time.
SMPS TEST 2:
(B) Jump pins 9, 10, 11 or 12 (3.5V) to pin 18 (DRV-ON). Apply AC power, the
Backlights should turn on. Note, the LED B+ will now jump to 63V then back down to
63V.
Note; If there is a problem with a load from the panel backlights, you can remove AC and
Disconnect P202 or P203. When AC is reapplied, the Backlight LEDs should turn on for
about 4 seconds and then shut off.
Indicates Hot Ground
July 2011 LCD-DV 55LW5600
100-240V~50/60Hz 2.5A
3.5V = 1.8A
12V = 2.8A
24V = 1.2A
81.4V = 1.6A
63V Line:
PWR-ON turns on the 63V
supply but it will only be 56V.
Note: A block of LEDs can be
turned on with this voltage.
It will increase to 63V when the
DRV-ON line goes high.
MODEL
INPUT
OUTPUT
LGP55-11SLPB
P201 Connector "SMPS Board" To P502 "MAIN Board"
Pin
Label
STBY
Run Diode
Check
24
ERROR
n/c
n/c
2.2V
23
n/c
n/c
n/c
n/c
22
PWM
0V
0.2V~3.3V
OL
21
12V
0V
12.07V
0.48V
20
n/c
n/c
n/c
n/c
19
12V
0V
12.07V
0.48V
18
DRV-ON
0V
3.24V
OL
17
12V
0V
12.07V
0.48V
16
V-SYNC
n/c
n/c
n/c
13~15
Gnd
Gnd
Gnd
Gnd
9~12
3.5V
3.56V
3.51V
OL
5~8
Gnd
Gnd
Gnd
Gnd
2~4
24V
0V
25V
1.1V
1
PWR-ON
0V
3.4V
1.16V
SK100
AC In
BD101
47
uF/450V
47
uF/450V
47
uF/450V
RL101
F501
Q102
Q101
T501
IC501
IC502
F501
1A / 250V
L601
P701
P832
P201
n/c
IC102
VC_2B
VC_2D
VC_2C
VC_2A
VC
_1D
VC
_1C
VC_
1B
VC_
1A
V
C
_4D
V
C
_4C
VC_
4B
VC_4A
VC
_3D
VC_3C
VC_3B
VC_3A
D251
D252
D255
D256
D261
F100
5A / 250V
SMPS BOARD
p/n: EAY62169901
100uF/
100V
100uF/
100V
+
-
+
-
C257 C256
63V
Different Size, W/Washer
Hot
Ground
Side
Cold (Chassis)
Gnd side
D201
D202
-
+
47
uF/450V
F101
3.15A / 250V
T101
Stand-By
3.5V
Source
D603
Q602
Q601
D253
Q251
Stby: 57V
Run: 396.5V
P202
P203
Stby: 154V
Run: 398.5V