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LG 50PJ340 Training Manual - Page 30

Signal and Voltage Distribution Block Diagram, Y-SUS Board, Board, MAIN Board, X-Board-Right

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50PJ350 Signal and Voltage Distribution Block Y Drive Upper FPCs 5VFG (5V) measured from Floating Ground 15VFG (15V) measured from Floating Ground SMPS TURN ON SEQUENCE Step 1: RL_ON: 17V, 5V, AC_Det, Error Det, Step 2: M_On: M5V, Va, Vs SMPS OUTPUT VOLTAGES IN STBY STB +5V SMPS OUTPUT VOLTAGES IN RUN STB5V, +5V, 17V to Main Board Vs, Va and M5V to Y-SUS, Display Panel Horizontal Electrodes Sustain P101 P102 P103 FPCs P201 P202 P110 P204 P211 FG P210 FG Y-SUS Board Scan P110 / P204 Floating Gnd (FG) Drive Signals, FG5V and Vscan. FG5V Scan FG15V 16V VSC -VY FG P101 FG P812 M5V, Vs, Va Note: Va not used by Y-SUS only fused and routed to the X-Board SMPS Board SK101 P813 AC Input Filter LVDS Video Logic Signals Display Enable To Y-SUS and Y-Drive 16V / M5V Note: 16V not used by Control P111 P121 CONTROL Board P101 Error Com SMPS Turn On Commands RL_ON Vs 17V, +5V, AC Det Z-SUS Board P2 FPCs P101 M_On M5V, Va, Vs P102 Stand By: STB +5 Run: AC Det +5, 17V 16V / M5V Z Drive Control P1 Signals P3 Z-SUB P7 Board P202 FPCs P203 P205 P212 Y Drive Floating Gnd (FG) Drive Signals, FG5V Lower Display Panel Horizontal Electrodes Reset, Sustain P114 Va P161 P162 3.3V RGB Logic Signals RGB Logic Signals 3.3V STBY 3.3V P231 P232 3.3V 3.3V P301 P703 Speakers MAIN Board P704 P801 3.3V Key Board Pull Up IR, Soft Touch Keys P100 Intelligent Sensor P101 And Power Button X-Board-Left P122 P121 P212 PX23-2BoPa21r1dP3-1C1 eP3n3t1er P211 P331 X-Board-Right Va Va P101 P102 P103 P104 P105 P201 P202 P203 P204 P205 P206 P301 P302 P303 P304 P305 Display Panel Vertical Address (Colored Cell Address) 30 July 2010 50PJ350 Plasma

Section	Page
50PJ350 PLASMA TRAINING PACKAGE	1
OUTLINE	2
Overview of Topics to be Discussed	3
LG Contacts	4
Preliminary Matters (The Fine Print)	5
ESD Notice	6
Safety and Handling, Checking Points	7
Basic Troubleshooting Steps	8
50PJ350 PRODUCT INFORMATION SECTION	9
50PJ350 Specifications	10
50PJ350 Logo Familiarization Page 1 of 3	11
50PJ350 Logo Familiarization Page 2 of 3	12
50PJ350 Logo Familiarization Page 3 of 3	13
600Hz Sub Field Driving	14
50PJ350 Remote Control	15
50PJ350 Rear and Side Input Jacks	16
50PJ350 Dimensions	17
DISASSEMBLY SECTION	18
Removing the Back Cover	19
Circuit Board Layout	20
Connector Identification	21
Disassembly Procedure for Circuit Board Removal	22
Disassembly Procedure for Circuit Board Removal (2)	23
X Drive Circuit Board Removal Continued	24
Getting to the X Circuit Boards	25
Left and Right X Drive Connector Removal	26
TCP (Tape Carrier Package) Generic Removal Precautions	27
Left and Right X Drive Removal	28
CIRCUIT OPERATION, TROUBLESHOOTING AND CIRCUIT ALIGNMENT SECTION	29
Signal and Voltage Distribution Block Diagram	30
Panel Label Explanation	31
Adjustment Notice	32
SWITCH MODE POWER SUPPLY SECTION	33
Switch Mode Power Supply Overview	34
Power Supply Board Layout (Drawing)	35
Power Supply Circuit Layout	36
Power Supply Basic Operation	37
Power Supply Turn On Sequence	38
Power Supply Va and Vs Adjustments	39
Power Supply Static Test with Light Bulb Load	40
Power Supply Static Test (Forcing on the SMPS in stages)	41
SMPS Connector P813 Identification, Voltages and Diode Check	42
SMPS Connector SC101 and P812 Identification, Voltages and Diode Check	43
Y-SUS BOARD SECTION	44
Y-SUS Block Diagram	45
Y-SUS Board Layout	46
Y-SUS Board Component Layout Drawing	47
VSC and -VY Adjustments	48
Y-Drive Signal Overview	49
Locking on to the Y-Drive Waveform Tip	50
Observing (Capturing) the Y-Drive Signal for Set Up Adjustment	51
Set Up and Set Down Adjustments	52
Set Up Adjustment Too High or Low	53
Set Down Adjustment Too High or Low	54
Y-SUS Board Troubleshooting VScan	55
Y-SUS Board P212 Connector to P205 Lower Y-Drive (Logic and FG5V)	56
Y-SUS Board P212 to Lower Y-Drive P205 Logic Signals Explained	57
Y-SUS P212 Connector Diode Mode Testing	58
Y-SUS Floating Ground (FG 15V) and (FG 5V) Checks	59
Y-SUS 16V Generation Checks	60
P101 Y-SUS to Control Board Fuse Information	61
Y-SUS P113 and P114 Plug Information	62
Y-SUS P211 Plug Information	63
Y-SUS P101 to Control P111 Plug Voltage Checks	64
Y-DRIVE BOARD SECTION	65
Y-Drive Board Layout	66
Y-Drive Upper Layout	67
Y-Drive Lower Layout	68
Y-Drive Diode Check Scan and FG	69
Y-Drive Buffer Troubleshooting	70
Y-Drive Upper P110 Connector Voltage and Diode Check	71
Y-Drive Lower P204 Connector Voltage and Diode Check	72
Removing (Panel) Flexible Ribbon Cables from Y-Drive Upper or Lower	73
Incorrectly Seated Y-Drive Flexible Ribbon Cables	74
Z-SUS SECTION	75
Z-SUS Block Diagram	76
Z-SUS Board Component Identification	77
Z-SUS Board Drawing	78
Z-SUS Waveform	79
VZB (Z-Bias) VR201 Adjustment	80
Connector P2 to Y-SUS P211 Voltages and Diode Checks	81
Connector P1 to Control P102 Voltages and Diode Checks	82
CONTROL BOARD SECTION	83
Control Board Pictorial	84
Control Board Component Identification and Checks	85
Control Board Temperature Sensor Location (Chocolate)	86
Locking on to the Y-Drive or Z-Drive Waveform Tip	87
Checking the Crystal X101 “Clock” on the Control Board	88
Control Board Signal (Simplified Block Diagram)	89
Control Board Connector P111 to Y-SUS P101 Voltages and Diode Mode Checks	90
Control P111 to Y-SUS P101 Plug Information	91
Control Board LVDS P121 Signals	92
Control Board LVDS P121 Connector Voltages and Diode Check	93
Control Board P101 Connector Pin ID and Voltages	94
P161 Connector \	95
P162 Connector \	96
X BOARD (LEFT, RIGHT and CENTER) SECTION	97
X Board Additional Information	98
X Board TCP Heat Sink Warning	99
X Board Layout Primary Circuit Diode Check	100
TCP (Tape Carrier Package)	101
TCP Testing	102
TCP 3.3V B+ Check	103
TCP Visual Observation. Damaged TCP	104
Left X Drive P122 Connector from Y-SUS P203 Information	105
P121, P212, P211 and P331 X Board Connector (VA Diode Check)	106
MAIN BOARD SECTION	107
Main Board Layout and Identification	108
Main Board Drawing (Front Side) Component Layout	109
Main Board Drawing (Front Side) Component Voltages	110
Main Board (Back Side) Component Layout	111
Main Board (Back Side) Component Voltages	112
Main Board Tuner Explained	113
Main Board Crystal X1, X402 and X401 Check	114
Main Board P703 (Removing the LVDS or SMPS Cable)	115
Main Board P703 LVDS Video Signal Test Points	116
Main Board Plug P703 “LVDS” Voltages	117
Main Board Plug P704 to Ft IR Board	118
Main Board Plug P301 to Power Supply Voltages and Diode Check	119
Main Board Speaker Plug P801 Voltage and Diode Check	120
FRONT IR, POWER LED and SOFT TOUCH KEY PAD SECTION	121
Front Control (IR and Intelligent Sensor) Board and Power LED Board Location	122
Front Control Board Connector P100 Voltage and Pin Identification	123
Front IR Board Plug P101 to Soft Touch Keys (Voltages and Pin Identification)	124
SOFT TOUCH KEY PAD SECTION (Board Layout and Identification)	125
Soft Touch Key Pad	126
Soft Touch Key Pad Resistance and Diode Mode Checks	127
INVISIBLE SPEAKER SYSTEM SECTION	128
INTERCONNECT DIAGRAM (11 X 17 Foldout) SECTION	129
Circuit Interconnect Diagram	130
LVDS Video Signal Waveforms	132

Match case Limit results 1 per page

P205

P110

P204

P201

P202

P203

P101

P102

P103

Soft Touch Keys

And Power Button

50PJ350 Signal and Voltage Distribution Block

Display Panel Horizontal

Electrodes Reset, Sustain

Y-SUS Board

P110 / P204

Floating Gnd (FG)

Drive Signals, FG5V

and Vscan.

P210

P101

M5V, Vs, Va

P812

P813

SK101

STB +5V

SMPS

Turn On

Commands

SMPS

Board

Input

Filter

SMPS OUTPUT VOLTAGES IN STBY

Stand By:

STB +5

Logic Signals

To Y-SUS and Y-Drive

P301

P704

P801

MAIN Board

Speakers

X-Board-Right

X-Board-Left

P101

P102

P103

P104

P201

P203

P204

P206

P301

P302

P303

P305

RGB Logic

Signals

RGB Logic

Signals

CONTROL

Board

Y Drive

Upper

Z-SUS

Board

P161

Display Panel Vertical Address (Colored Cell Address)

Display Panel

Horizontal

Electrodes

Sustain

16V / M5V

RL_ON

M_On

STB5V, +5V, 17V to Main Board

Vs, Va and M5V to Y-SUS,

SMPS OUTPUT VOLTAGES IN RUN

16V / M5V

Z Drive Control

Signals

IR,

Intelligent Sensor

FPCs

3.3V

STBY

X-Board-Center

P121

P212

P211

P331

P231

P122

P101

P121

P211

Note:

Va not used

by Y-SUS only

fused and routed

to the X-Board

P101

P111

Note: 16V not used

by Control

LVDS

3.3V

FPCs

Y Drive

Lower

5VFG (5V) measured

from Floating Ground

17V, +5V, AC Det

M5V,

Va, Vs

3.3V

Key Board

Pull Up

P114

Display Enable

Video

Step 1: RL_ON: 17V, 5V, AC_Det, Error Det,

Step 2: M_On:

M5V, Va, Vs

P102

Z-SUB

Board

3.3V

P101

P212

FG5V

FG15V

16V

VSC

-VY

15VFG (15V) measured

from Floating Ground

P100

SMPS TURN ON SEQUENCE

P703

July 2010

50PJ350

Plasma

P202

Scan

Floating Gnd (FG)

Drive Signals, FG5V

P162

P105

P202

P205

P304

Error Com

Run:

AC Det +5, 17V

3.3V

P232