Hitachi 43FDX01B Service Manual - Page 26

Alignments

EN 26

LGE PDP 2K6

8.

8.

Alignments

Index of this chapter:

8.1

General

8.2

Alignments

8.2.1

Tools

8.2.2

Connection Diagram and Set-Up

8.2.4

Y-SUS Alignment

8.1

General

Notes:

•

Important

: if the PSU board, the Y-SUS board or the Z-

SUS board is replaced, the technician should check if the

voltages delivered by these boards are correct. If not, the

boards should be realigned in order to avoid bad

performance of the PDP.

•

Allow the set to warm up according conditions below for at

least 10 minutes before adjusting.

–

Service signal: 100% Full White.

–

Service DC voltage: Vcc= 5 V, Va= 60 V, Vs= 180 V.

–

DC/DC Pack voltage: Vsc= 120 V, Vzb = 100 V, -Vy= -

200 V

–

Preliminaries environment: Temp (25 ± 5 deg. C),

Relative Humidity (65 ± 10%).

•

Module adjustment should follow below sequence.

1.

First, set up the Vsc / -Vy voltage (Vsc= 120 V, -Vy= -

200 V).

2.

Then, adjust the voltage waveform (refer to

adjustment).

Caution:

Do not leave a still image for more than 10 minutes

(especially The Digital pattern or Cross Hatch Pattern which

has clear gradation) on the display, because this will cause

burn-in effects.

8.2

Alignments

8.2.1

Tools

•

Digital oscilloscope: > 200 MHz.

•

DVM (Digital Multimeter): Fluke 187 or similar.

•

Signal generator: VG-828 or similar.

•

DC power supply or PSU:

–

1 DC power supply for Vs: 0 - 200 V, > 10 A.

–

1 DC power supply for Va: 0 - 100 V, > 5 A.

–

1 DC power supply for 5V: 0 - 10 V, > 10 A.

–

A set of wires and appropriate connectors to hook up

the power supplies to the display.

–

Required voltage stability of the power supplies: within

± 1% for Vs and Va, within ± 3% for 5V.

8.2.2

Connection Diagram and Set-Up

1.

For the connection diagram of the measuring instrument,

refer to Fig. "Measuring equipment connection diagram".

2.

Set-up the initial voltage Vcc= 5 V, Va= 60 V, Vs= 180 V.

Note that the initial set-up voltage can be changed

according to the module’s characteristics (= the values on

the voltage label).

3.

Environmental conditions: temperature 25 ± 5 °C, relative

humidity 65 ± 10 %.

Figure 8-1 Measuring equipment connection diagram

8.2.3

PSU Alignment

Figure 8-2 PSU Alignment

Vs Voltage Adjustment

1.

Measure the Vs voltage (180...195 VDC) on pin 10 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 Vs to its correct value with

potentiometer VR551 on the PSU board.

1

8

0V

1.

3

A

DC Power

Su

pply for V

s

65V

0.01A

DC Power

Su

pply for V

a

5V

1.2 A

DC Power

Su

pply for 5V

S

ign

a

l Gener

a

tor (VG-

8

25)

Power

Caution

(1) The power of the

s

ign

a

l gener

a

tor

s

ho

u

ld

b

e t

u

rned “ON”

b

efore t

u

rning “ON”

the power of the DC power

su

pply.

(2) The volt

a

ge of DC power

su

pplie

s

, in

s

t

a

nd

a

rd of Mod

u

le inp

u

t volt

a

ge,

s

ho

u

ld

b

e pre

s

et

as

follow

s

:

Vcc: 5V,

V

a

: 60V,

V

s

: 1

8

0V

(

3

) The power of power

su

pply m

us

t t

u

rned “ON”

b

y the following

s

e

qu

ence.

Rever

s

e direction when t

u

rning “off”.

*

Mod

u

le “ON” : 5V => V

a

=> V

s

,

Mod

u

le “OFF”: V

s

=> V

a

=> 5V

(4)

S

ign

a

l gener

a

tor

s

ho

u

ld

b

e

s

elected with 1024 x 76

8

(XGA) mode.

Al

s

o the

us

e of the norm

a

l P

S

U (Power

Su

pply Unit) i

s

po

ss

i

b

le

Extern

a

l

Extern

a

l

Extern

a

l

G_16

3

90_02

3

.ep

s

170

8

06

+

-

+

-

+

-

Waveform te

s

tpoint

VR2

VR

3

PSU (3501Q00203B)

Z001

F001

1M03

1M46

1M10

CN805

1M02

CN807

CN806

Vs adj

Va adj

VR551

VR351

G_16391_009.eps

020707

Hitachi 43FDX01B Service Manual - Page 26

EN 26, LGE PDP 2K6

Page 26 highlights

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