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Hitachi 43FDX01B Service Manual - Page 27

EN 27, LGE PDP 2K6

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Va Voltage Adjustment 1. Measure the Va voltage (55...65 VDC) on pin 1 of CN806 on the PSU board (see Figure "PSU Alignment"). The voltage should have the same value as indicated on the label on the PSU. 2. If necessary, adjust Va to its correct value with potentiometer VR351 on the PSU board. 8.2.4 Y-SUS Alignment P1 Wave form P2 P2 P3 P4 P1 FS1 FS2 FS3 Alignments LGE PDP 2K6 8. EN 27 2. Adjust -Vy to the value indicated on the voltage sticker with potentiometer VRy on the Y-SUS board. Y -SUS Set-up Voltage Waveform Adjustment Now connect the oscilloscope between the Waveform test point on the Y-Driver board and GND (see Figure ""Y-SUS Alignment"). Trigger with Vs-DA on the Control board (see Figure "Trigger point Vs-DA"). CTRL board P2 IC12 +3.3V P7 1 X1 P3 D12 D13 D14 D15 +1.8V IC1 VS_DA IC11 +3.3V IC13 TRIGGER POINT P4 P10 P11 Figure 8-4 Trigger point Vs-DA P1 G_16391_012.eps 020707 P5 Setup VR3 Setdn VR2 P4 P6 Vsc -Vy Vsc VRsc VRy P8 C51 -Vy R36 P152 P7 P8 G_16391_011.eps 020707 Figure 8-3 Y-SUS alignment Condition • Set up a situation as shown in "Measuring equipment connection diagram". • Check if the voltages Vs and Va of the PSU are correct (see PSU label and PSU Alignment 8.2.3). Vscan Voltage Adjustment 1. Measure the Vscan voltage across C51 (or on the "Vsc" test point on the right of connector P4) on the Y-SUS board (see Figure "Y-SUS Alignment"). 2. Adjust Vsc to the value indicated on the voltage sticker with potentiometer VRsc on the Y-SUS board. -Vy Voltage Adjustment 1. Measure the Vy voltage across R36 (or on the "Vy" test point on the DC converter) on the Y-SUS board (see Figure "Y-SUS Alignment"). G_16391_008.eps 020707 Figure 8-5 V set-up waveform 1. Refer to Figure "V set-up waveform". 2. Adjust Vsetup to 150 ± 1 V with potentiometer VR3/Setup on the Y-SUS board (see Figure "Y-SUS Alignment"). 3. Adjust the duration of time-interval "A" to 10 ± 5 µsec with potentiometer VR2/Setdown on the Y-SUS board.

Section	Page
Content	1
1. Technical Specifications, Connections, and Chassis Overview	2
1.1 Technical Specifications PDP42X3*	2
1.1.1 General Specification	2
Table 1-1 General Specifications	2
1.1.2 Definitions	2
Figure 1-1 Definition of module position	2
Figure 1-2 Identification label	2
Figure 1-3 Voltage label (on rear side of module)	2
Figure 1-4 Part number printing (on board)	3
Figure 1-5 Part number label (on board)	3
Figure 1-6 TCP serial number (on TCP)	3
1.1.3 Chassis Overview	4
Figure 1-7 PWB location	4
2. Safety Instructions, Warnings, and Notes	5
2.1 Warnings	5
3. Directions for Use	6
4. Mechanical Instructions	7
4.1 Mechanical Overviews	7
Figure 4-1 Cable dressing	7
Table 4-1 Cable function	7
Figure 4-2 Label location on PWB’s	8
Figure 4-3 Label indication	8
Figure 4-4 Label information (1)	9
Figure 4-5 Label information (2)	9
4.2 Panel/assy removal	9
4.2.1 Power Supply Unit	9
Figure 4-6 PSU removal	9
4.2.2 Control Board	9
Figure 4-7 Control board removal	9
4.2.3 Y Sustain Board	10
Figure 4-8 Y-SUS board removal	10
4.2.4 Y Driver Board	10
Figure 4-9 Y driver board removal	10
Figure 4-10 TCP Separation	10
4.2.5 Z-Sustain board	11
Figure 4-11 Z-SUS board removal	11
Figure 4-12 FPC removal	11
4.2.6 X-board	11
Figure 4-13 X board removal 1/2	11
Figure 4-14 X board removal 2/2	11
Figure 4-15 TCP Separation	11
5. Service Modes, Error Codes, and Fault Finding	12
5.1 Quick Module Check	12
Figure 5-1 Logical judgement	12
Figure 5-2 Quick check	12
5.1.1 No Display	13
Connectors	13
Figure 5-3 Control + Y-SUS board	13
Figure 5-4 Control + Z-SUS board	13
Figure 5-5 Control + X board	13
Figure 5-6 Signal input (LVDS)	13
Exhaust Tip	13
Figure 5-7 Exhaust tip \	13
PSU (see figure “PSU trouble shooting“)	14
Figure 5-8 PSU trouble shooting	14
PSU Power Protection	14
5.1.2 Bar Defect (Vertical)	15
Connector	15
Figure 5-9 Connector check (1)	15
Figure 5-10 Connector check (2)	15
Checking the TCP	15
Figure 5-11 TCP torn	15
Figure 5-12 TCP IC broken	15
Control Board	15
Figure 5-13 Control board address flow	15
5.1.3 Line Defect (Vertical)	15
Line Open or Short	15
Figure 5-14 Single line defect	15
Line Open or Short with the Same Distance	16
Figure 5-15 Evenly repeated lines	16
5.1.4 Bar Defect (Horizontal)	16
Connector	16
Figure 5-16 Check FPC connectors	16
Figure 5-17 Check drive connectors	16
Scan IC Check	16
Figure 5-18 Scan IC output diode check	16
5.1.5 Line Defect (Horizontal)	16
FPC Check	16
Figure 5-19 Open FPC electrode / Panel electrode breakdown	16
Scan IC Check	17
Figure 5-20 Scan IC output diode check	17
5.1.6 Mis-discharge Defect	17
Figure 5-21 Mis-discharge	17
Checking Order	17
How to Check an IPM	17
Forward direction	17
Reverse direction	17
Figure 5-22 IPM check	17
5.2 Detailed Module Check	17
5.2.1 No Display	17
The Screen Does Not Display a Picture	17
Figure 5-23 Output waveforms on X, Y, and Z-boards	18
5.2.2 Display Defects	19
Half of the Screen is Not Shown	19
<TABLE>	19
Figure 5-24 Screen display “1/2 display”	19
Vertical Parts of the Screen are Missing	19
Figure 5-25 Screen display “Vertical parts missing”	19
Figure 5-26 Data TCP IC examination	19
Unusual Pattern on Display	19
Figure 5-27 Possible cases	19
Scan FPC Problem	19
Figure 5-28 Screen display “Scan FPC problem”	20
Figure 5-29 Scan IC	20
Vertical Lines with Regular Gap (Vertical Stripe Flash at Special Colour)	20
Figure 5-30 Screen display “Vertical lines with regular gap”	20
Data Copy in Vertical Direction	20
Figure 5-31 Screen display “Data copy in vertical direction”	20
One or Several Vertical Line(s) on the Screen	20
Figure 5-32 Screen display “Vertical lines”	20
One or Several Horizontal Lines on the Screen	20
Figure 5-33 Screen display “Horizontal lines”	20
Low Brightness of Displayed Picture	20
Partially Other Colour on Full White Screen or Partially Mis-Discharge on Full Black Screen.	20
Figure 5-34 Y output voltage waveform	21
No Specified Brightness at Specified Colour	21
5.2.3 Checking for Component Damage	21
Y IPM (IC 18) or Z IPM (IC 2)	21
Figure 5-35 IPM normal output	21
FET assy (Y board: HS2)	21
Figure 5-36 Set_up FET defective	21
Figure 5-37 Set_down FET defective	21
SCAN IC (Y-DRV board: IC1-10)	21
Figure 5-38 SCAN IC defective	22
Figure 5-39 SCAN IC shorted output	22
Figure 5-40 SCAN IC normal output wave	22
TCPs	22
Figure 5-41 COF IC output defective	22
Figure 5-42 TCP normal output	22
Crystal (CTRL board: X1)	22
Figure 5-43 Crystal normal output	23
Figure 5-44 Crystal defective output	23
5.3 Defect Description Form	24
Figure 5-45 Defect Description Form (DDF)	24
6. Block Diagrams, Test Point Overviews, and Waveforms	25
6.1 Block Diagram PDP Module	25
Figure 6-1 Block Diagram	25
7. Circuit Diagrams and PWB Layouts	25
8. Alignments	26
8.1 General	26
8.2 Alignments	26
8.2.1 Tools	26
8.2.2 Connection Diagram and Set-Up	26
Figure 8-1 Measuring equipment connection diagram	26
8.2.3 PSU Alignment	26
Figure 8-2 PSU Alignment	26
Vs Voltage Adjustment	26
Va Voltage Adjustment	27
8.2.4 Y-SUS Alignment	27
Figure 8-3 Y-SUS alignment	27
Condition	27
Vscan Voltage Adjustment	27
-Vy Voltage Adjustment	27
Y -SUS Set-up Voltage Waveform Adjustment	27
Figure 8-4 Trigger point Vs-DA	27
Figure 8-5 V set-up waveform	27
8.2.5 Z-SUS Alignment	28
Figure 8-6 Z-SUS alignment	28
Condition	28
Vzb (Z bias) Voltage Adjustment	28
8.2.6 Internal Test Patterns	28
Figure 8-7 P1: Connector for Internal Test Patterns	28
9. Circuit Descriptions, Abbreviation List, and IC Data Sheets	29
9.1 Introduction	29
9.2 Power Supply Unit (PSU)	29
9.2.1 Purpose	29
Figure 9-1 Power supply	29
9.2.2 Power ON and Power OFF Sequence	30
Figure 9-2 Power supply sequence	30
9.3 Control Board	30
9.3.1 Purpose	30
Figure 9-3 Control board	30
9.4 X Board	30
9.4.1 Purpose	30
Figure 9-4 X boards	30
9.5 Y Sustain Board	31
9.5.1 Purpose	31
Figure 9-5 Y Sustain board	31
9.5.2 Main Components	31
9.6 Y Drive Board	31
9.6.1 Purpose	31
Figure 9-6 Y Drive board	31
9.7 Z Sustain Board	31
9.7.1 Purpose	31
9.7.2 Main Components	31
Figure 9-7 Z Sustain Board	31
9.8 DC/DC Converter Part	32
9.8.1 Purpose	32
Figure 9-8 DC/DC Converter block diagram	32
Figure 9-9 DC/DC Converter part	32
9.9 FPC (Flexible Printed Circuit)	32
9.9.1 Purpose	32
Figure 9-10 Flexible Printed Circuit	32
9.10 FFC (Flat Flexible Cable)	32
9.10.1 Purpose	32
Figure 9-11 Flat Flexible Cable	32
9.11 TCP (Tape Carrier Package)	32
9.11.1 Purpose	32
Figure 9-12 Tape Carrier Package	32
9.12 IPM (Intelligent Power Modules)	33
9.12.1 Purpose	33
Figure 9-13 Intelligent Power Modules	33
9.12.2 Main Components	33
9.13 Abbreviation List	33
9.14 IC Data Sheets	33
10. Spare Parts List	34

Match case Limit results 1 per page

Alignments

EN 27

LGE PDP 2K6

Va Voltage Adjustment

Measure the Va voltage (55...65 VDC) on pin 1 of CN806

on the PSU board (see Figure

“

PSU Alignment

”

). The

voltage should have the same value as indicated on the

label on the PSU.

If necessary, adjust Va to its correct value with

potentiometer VR351 on the PSU board.

8.2.4

Y-SUS Alignment

Figure 8-3 Y-SUS alignment

Condition

•

Set up a situation as shown in

“

Measuring equipment

connection diagram

”

•

Check if the voltages Vs and Va of the PSU are correct

(see PSU label and PSU Alignment 8.2.3).

Vscan Voltage Adjustment

Measure the Vscan voltage across C51 (or on the

“

Vsc

”

test point on the right of connector P4) on the Y-SUS board

(see Figure

“

Y-SUS Alignment

”

Adjust Vsc to the value indicated on the voltage sticker with

potentiometer VRsc on the Y-SUS board.

-Vy Voltage Adjustment

Measure the Vy voltage across R36 (or on the

“

”

test

point on the DC converter) on the Y-SUS board (see Figure

“

Y-SUS Alignment

”

Adjust -Vy to the value indicated on the voltage sticker with

potentiometer VRy on the Y-SUS board.

Y -SUS Set-up Voltage Waveform Adjustment

Now connect the oscilloscope between the Waveform test

point on the Y-Driver board and GND (see Figure

““

Y-SUS

Alignment

”

). Trigger with Vs-DA on the Control board (see

Figure

“

Trigger point Vs-DA

”

Figure 8-4 Trigger point Vs-DA

Figure 8-5 V set-up waveform

Refer to Figure

“

V set-up waveform

”

Adjust Vsetup to 150 ± 1 V with potentiometer VR3/Setup

on the Y-SUS board (see Figure

“

Y-SUS Alignment

”

Adjust the duration of time-interval

“

”

to 10 ± 5 μsec with

potentiometer VR2/Setdown on the Y-SUS board.

G_16391_011.eps

020707

Setup

Setdn

Vsc

-Vy

FS2

FS3

P152

VR3

VR2

FS1

Wave

form

C51

R36

-Vy

Vsc

VRsc

VRy

G_16391_012.eps

020707

P11

P10

IC1

D13

D14

D15

D12

CTRL board

VS_DA

TRIGGER

POINT

IC12

IC11

IC13

+1.8V

+3.3V

G_16391_008.eps

020707