Page 1
LG
2018 UHD 720p LCD TV Training Materials
32LK610BPUA WebOS
4.0
FHD TV
POWER SUPPLY TESTING
Using a Simple 3V Jig or
Smart TV Test Jig and Multi-Gender Board
Published October 09th, 2018
Page 2
Power Supply (SMPS) Board Layout (EAY64548901)
To Backlights
P801
32LK610BPUA (2018) Power Supply Testing
To Main
Board P2300
P201
October 2018
SK100
AC In
Page 01
LG
Page 3
32LK610BPUA SMPS (Power Supply) Drawing
32LK610BPUA (2018) Power Supply Testing
P801 To Panel Backlight Power pin 7.
P801 Pin 1 goes to Backlight Driver
Q801 (Back of SMPS)
LED- (95.8V) 50%
LED+ (118.5V) 50%
P801 "SMPS Board" To "LED Backlights"
PIN LABEL RUN Diode
1
3
5
7
LED-
N/C
N/C
LED+
110.4V~89V
n/c
n/c
134.8V~113.2V
OL
n/c
n/c
OL
CY101
In Out Dim to Bright
AC 1st applied 168V (30sec) then fall to 76V
During Stand-By LED+ will fluctuate 76V
Main Board Disconnected: 69V
Backlight Setting Dim 0% to Bright 100%
LF101
CX101
Pins 2-6 are not connection.
Direct Lit Backlights (8 LEDs on 1 Array Strip)
SMPS TEST: Forcing SMPS On.
This test requires simple 3V jig.
See below or Multi-Gender Board, use Port P16
(12pin), See Article 9627.
Using 3V Simple Jig: Remove AC Power.
Disconnect P2300 on Main Board.
Test 1: Using a 3V jig, Jump 3V to pin 1 (PWR_ON).
Apply AC Power. (No Backlights in Test 1)
(Pins 4-8) rises to 13.13V. Backlight Power LED+
114.8V. LED- 95.6V. PDIM will be 3.42V.
Remove AC Power.
Test 2: Using a 3V jig, Jump 3V to pin 11 (DRV_ON).
Place a 12V Light Bulb on 13.2V to Gnd.
Apply AC Power. All Voltages should be produced.
(13.2V) 12.95V to Main and
“LED+” 119.2V to the Backlights), “LED-“ 94.3V.
This will also force the Backlights to come on. PDIM will be 3.77V
Note:
from the Jig.
Special Note:
the 3V Simple Jig).
Test 2
2 AA (3V)
Test 1
Test Set Up
P201
11 12
10
3
12
P201 still inserted. P2300 removed.
Use P2300 side to insert needles
1157
Solder
6
Note: STBY 7.83V (Pins 4-8)
Must be present when AC is
applied before beginning test which
Solder
indicates Standby voltage is OK.
The 13.2V Line “Must” be loaded
using a 12V light Bulb when using
1
H
T
CY102
1
0
To Backlight LEDs
78V (116V) (91V)
CY104
CY103
LF102
CX102
VA100
F100
5A / 250V
SK100
AC
SMPS
P/N: EAY64548901
P204
P203
P202
LED-LED+
P801
168V (159V)69V
D103
69V
69V
168V (159V)
69V
D101
LB112
D104
D102
-
168V (159V)
PRIMARY
CY111
C601
460V
120uF
R113
+
LB110
D802
78V
(116V)
C107
C108
(0V)
Can’t Read
Q101
C806
C205
171V (288V)
R112
168V
(159V)
L801
P802
Hot Gnd
(Shock Hazard)
VOLTAGE LABEL
MODEL LGP32D-17F1
INPUT
OUTPUT
3V SIMPLE JIG: Made from 2 (AA) batteries.
On the other side, solder two red wires (needle tipped) to
the + and one black wire (needle tipped) to the – side.
Note: For Ground you can use Panel Back.
AC100V~240Vac 50/60Hz. 1.5A
13.2V = 1.8A
31V – 660mA
Jump + to – on one side.
See Article 8979
P802
IC801
Gnd
R816
SECONDARY
T101
C106
C105 CY111
7.83V (13.20V)
7.83V (13.20V)
7.83V (13.20V)
60.42V (90V)
P201
0V
(0.15V)
C203
C201
P204
Chassis Gnd
LB113
Note: The Smart Test Jig and Multi-Gender Board “Can” be
used in this model for testing. Use Port P16. 13.2V Line
does not have to be loaded in this case,
Jig Switch set to 24V / LCD Power (See Article 9627).
P201 "SMPS Board" To P2300 "MAIN Board"
PIN LABEL RUN DiodeSTBY
P203P202
(3)
(2)
9-10
4-8
(1)
P-DIM
12 0V
MS (Drv_On)
11
Gnd
13.2V
1
Gnd
N/C
PWR_ON
3
2
Voltages below for Backlight Power (LED+) are with Main
disconnected and using Simple 3V Jig to supply turn-on
*0.16V-3.18V
0V
Gnd Gnd
7.83V
Gnd
n/c
0V
1.97V
13.10V
Gnd
3.35V
*Dim to Bright
n/c
commands on-at-a-time.
(Special Note: 13.2V Line “Must” be loaded using a 12V
light Bulb when using the 3V Simple Jig).
(1)
PWR-On Pin 1: Turns on 13.2V to the Main. No
backlights at this time. Backlight Power is 114.6V.
(2)
MS (DRV_On) Pin 11: Turns on the Backlights.
Backlight power goes to 119.3V.
Voltages given below for PDIM are with Main connected
and receiving normal Digital Antenna Signal.
(3)
PDIM Pin 12: Will vary according to incoming video IRE
level and OSD Backlight setting Output from the Video
Processor. And the Backlight settings in the Customer’s
Menu 0% TO 100%. It is then routed out P1001 to P201
and sent to the LED Driver IC on the Back of the SMPS.
The Range is: Dim 0.17V ~ Bright 3.28V. (1.76V at 50%)
PDIM is actually a 3.44V p/p pulse (PWM Control).
Pin
IC801
Run
4)
0.86V
3)
13.1V
2)
n/c
1)
89V
Pin
5)
6)
7)
8)
Run
3.19V
Gnd
1.95V
Gnd
OL
OL
Gnd
OL
Gnd
n/c
1.20V
MAIN
12
11
9-10
8-4
3
2
1
October 2018
Page 02
LG
Page 4
Test Using Multi-Gender Board and Smart TV Test Jig
32LK610BPUA (2018) Power Supply Testing
1
▶ Check power board voltage, (13.2V). ▶ Disconnect the Main Board 12Pin Power Cable connector.
3
2
4
2018
LK57,
32/43/49LK54,
32LK61/62
43/49LK61
▶ Connect the 12Pin Power Cable connector
to
▶ Set the PRODUCT SWITCH on SMART JIG to LCD.
▶ LCD MODEL SWITCH: Set the switch to 24V.
October 2018
Also
UH5500
the Multi Gender JIG (P16 port) 12Pin connector.
Page 03
▶ Apply Power; when the OK LED turns
Power
▶ Check all voltage out to the Main board.
▶ When the NG LED turns on, the
can be judged
Board is normal. Backlights should be On.
Power Board
as defective.
on,
LG
Page 5
Power Supply Board Test 1 (Using 3V Simple Jig)
32LK610BPUA (2018) Power Supply Testing
Note: The numbers in Fig 1 refer to the “Main” board connector (from the
SMPS) that has been unplugged. Use this end for easy insertion of needles.
Count the Pins from the SMPS side.
AC “Must Not” be applied at any time while adding jumpers or while
unplugging connectors, damage to the circuit Board may occur.
I
)
When AC is applied, the SMPS “MUST” be producing STBY
P201. Note (If Main board is Connected): When AC 1
of
7.8V on pins 4-8,
st
applied, Backlight
Power is 168V for 30sec. Then falls to 76V. (Main Disconnected: Backlight
Power is 69V.
If STBY 7.80V is missing, STBY voltage may be loaded down by the Main Board
or the Joy Stick/IR Board. Remove connector P2300 on Main board from SMPS.
If STBY is still missing, SMPS is defective but make sure AC is arriving at the
connector SK100.
II
With P2300 on the Main Board unplugged, it will make insertion of the
)
tips easier. Use
P2300 (Main Board side) to insert connections during these
Needle
tests. Pin numbers will be given from P201 side.
TEST 1: TESTING THE POWER SUPPLY TURN-ON CIRCUIT. (See Fig 1)
No Backlights during this test.
SMPS TEST 1
Top Row pins
are Odd numbers
Unplugged
side of P2300
Fig 1
2 (1.5V Batteries)
Size: AA
MS DRV_ON P-DIM
12.2V
3V
Gnd
PWR_ON
Gnd
11
9
7
5
3
1
A
STAND-BY VOLTAGE:
7.80V in STBY, 13.12V with PWR_ON.
Pin 1 Top Pin on Bottom (SMPS Side)
Top row is odd pins, bottom row is even pins.
12
10
8
6
4
2
Gnd
12.2V12.2V
12.2V
12.2V
n/c
(1) Using two AA 1.5V batteries hooked in series (3V supply) jump the negative
lead to ground (pin 3) [Main pin 9] and the positive lead to PWR-ON (pin 1)
[Main pin 11] as shown in example (A) in Fig 1 on the right.
Apply AC, this will turn on the SMPS. No Relay click will be heard.
Check that the 13.2V supplies that go to the Main board have turned on;
To Main Board Power:
• 13.2V: (P201 “13.12V” pins 4-8)
• Backlight Power will read 114.6V (No Backlights)
(2) Remove AC Power (Leave Battery connected in this configuration).
October 2018
Page 04
Use SMPS side for pin count.
WARNING:
Do not to let the leads touch positive (+) to
negative (–) at any time as this will cause
battery to overheat creating a fire hazard.
Pin Numbers on Main are the same as pins on SMPS.
LG
Page 6
Power Supply Board Test 2 (Using 3V Simple Jig)
32LK610BPUA (2018) Power Supply Testing
Continue if the 1sttest was OK. Leave original jumper (A) in
place. AC Power is removed at this time.
TEST 2: Backlight Section (Using P2300 side)
(3) (B) Jump the 3V to Pin 11 MS (DRV_ON). (See Fig. 2),
Simulating a Power On and Backlight On command.
(4) (C) Add a 12V Light Bulb to the 13.2V Line and Ground.
(5) Apply AC Power.
Backlights Normal: Backlight Power 119.3V
a) If normal, the backlights will be on.
SMPS OK, Backlight Section OK. Backlight power P801 pin 7
(119.3V). Backlight Ground Return Pin 1: (94.3V)
Backlights Abnormal:
a) Recheck all connections.
b) Confirm the PWR_ON and DRV_ON lines are pulling up to at
least 3V.
c) Confirm Light Bulb isn’t open and connected to 13.2V line.
d) Check the connections to the Panel’s Backlights.
SMPS TEST 2
Top Row pins
are Odd numbers
2 (1.5V Batteries)
Size: AA
13.2V Line: 13.12V with PWR_ON and DRV_ON.
Failure to add Light Bulb, Backlights “Blink” rapidly.
Fig 2
Female side
of P2300
B
P-DIM
12
Gnd
11
9
7
5
3
1
10
8
6
4
2
Gnd
12.2V12.2V
12.2V
12.2V
n/c
C
3V
MS DRV_ON
12.2V
Gnd
PWR_ON
A
Pin 1 Top Pin on Bottom (SMPS Side)
Top row is odd pins, bottom row is even pins.
If the DRV_On command is pulling up to 3V and the 142.8 is being Generated
at P801, suspect a Panel’s Backlight Section problem.
Note: (Using Simple Jig), If P801 is disconnected (Backlights Open), the backlight
power will come on at 115.3V, and stay there.
(Main Connected), If P801 is disconnected (Backlights Open), the backlight
power will come on at 173V, and stay there.
Warning: Backlight Power is Slow to bleed down.
If test is successful, remove AC Power, Remove all Jumpers.
Reconnect P2300 on the Main and confirm PWR_ON and DRV_ON lines.
October 2018
Page 05
Use SMPS side for pin count.
WARNING:
Do not to let the leads touch positive (+) to
negative (–) at any time as this will cause
battery to overheat creating a fire hazard.
Pin Numbers on Main are the same as pins on SMPS.
LG
Page 7
Power Supply Board Voltage Reading During Test Modes
Note: With the Main board disconnected from the SMPS:
The Backlight Power is 69V.
(13.2V) is 7.83V in STBY (Main Disconnected).
32LK610BPUA (2018) Power Supply Testing
P201 "SMPS Board" Stand-Alone Test (Simple 3V Jig)
Pin Label Test 1 Test 2 Main
12 P-DIM
11 MS (DRV-ON)
9-10 Gnd
4-8 13.2V
3Gnd
2N/C
1 PWR-ON
3.42V 3.77V 12
0.0V 3.11V 11
Gnd Gnd 9-10
13.12V 12.95V 4-8
Gnd Gnd 3
n/c n/c 2
3.13V 3.12V 1
BL Off BL On
LED Power during TEST 1.
LED Power during TEST 2.
Test 1 LED Ground Return Line
Test 2 LED Ground Return Line
Failure to add Light Bulb, Backlights “Blink” rapidly.
Backlight Controller and Driver IC801
D802 Anode Backlight Power Source P801 pin 7
D204 13.2V Source
SMPS Controller IC is IC101
Test 1 = PWR_ON only
Test 2 = PWR_ON and DRV_ON (13.2V Loaded with 12V Bulb)
Failure to use Light Bulb, Backlights will Blink On/Off.
During Test, Main board is disconnected
BL = Backlights
ADDITIONAL DETAILS
Pin 7 P801 114.6V
Pin 7 P801 119.3V (13.2V Loaded)
Pin 1 P801 95.6V
Pin 1 P801 94.3V (13.2V Loaded)
October 2018
Page 06
LG
Page 8
P201 Power Supply Connector Voltage and Diode Check
32LK610BPUA (2018) Power Supply Testing
P201 "SMPS Board" to "MAIN Board" P2300
Pin Label STBY Run Diode Check Main
(3)
12
11
9-10 Gnd
4-8 13.2V
3Gnd
2N/C
1
(1)
PWR-On Pin 1: Turns on 13.2V to the Main.
(2)
MS (DRV_On) Pin 11: Turns on the Backlights. Backlight power goes to 119.3V.
P801 "SMPS Board" To "Panel LEDs"
Pin Label Run Diode Check 50% PDIM
1
3N/C n/c n/c n/c
5N/C n/c n/c n/c
LED- 110.4V~89.0V OL 95.8V
P-DIM
(2)
MS (DRV_ON)
(1)
PWR-ON
Backlight Power is 114.8V, No backlights at this time.
0.05V 0.16V~3.18V OL
0V 1.97V OL
Gnd Gnd Gnd
7.83V 13.10V OL
Gnd Gnd Gnd
n/c n/c n/c
0V 3.35V 0.94V
(3)
Dim to Bright
P201 to Main
12
11
9-10
4-8
3
2
1
Pin Silk Screen Label
Pin Numbers on Main are the same
as pins on SMPS.
(3)
P-DIM Pin 12: Will vary according to incoming video IRE level and
OSD Backlight setting Output from the Video Processor. And the
Backlight settings in the Customer’s Menu 0% TO 100%. It is then
routed out P2300 to P201 and sent to the LED Driver IC on the Back
of the SMPS.
1
Top Row of pins are odd
numbers
7
In
Out
Note: During STBY, LED+ is 76V. With Main disconnected 69V.
October 2018
LED+ 134.8V~113.2V OL 118.5V
*Dim (0%) to Bright (100%)
When AC 1st applied, LED+ is 168V (30sec) then fall to 76V
Page 07
Diode Mode values taken with all Connectors Removed
LG
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