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TitleSERVICE MANUAL - lcd-television-repair.com
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Page 1

DELL E152FPc

1





15” LCD MONITOR
DELL E152FPc






THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY. EVERY REASONABLE EFFORT

HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE

ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RE LIABILITY

FOR CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA: MAR.-20-2005

SERVICE MANUAL

Page 2

DELL E152FPc

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Table of Contents


TABLE OF CONTENTS...............................................................................................................2

1. MONITOR SPECIFICATIONS .................................................................................................4

2. LCD MONITOR DESCRIPTION ..............................................................................................5

3. OPERATING INSTRUCTIONS ................................................................................................6

3.1 GENERAL INSTRUCTIONS...............................................................................................6

3.2 CONTROL BUTTONS........................................................................................................6

3.3 ADJUSTING THE PICTURE...............................................................................................7

4. INPUT/OUTPUT SPECIFICATION ........................................................................................10

4.1 INPUT SIGNAL CONNECTOR.........................................................................................10

4.2 FACTORY PRESET DISPLAY MODES............................................................................10

4.3 POWER SUPPLY REQUIREMENTS ............................................................................... 11

4.4 PANEL SPECIFICATION.................................................................................................. 11

5. BLOCK DIAGRAM ................................................................................................................14

5.1 MONITOR EXPLODED VIEW..........................................................................................14

5.2 SOFTWARE FLOW CHART.............................................................................................15

5.3 ELECTRICAL BLOCK DIAGRAM.....................................................................................17

6. SCHEMATIC..........................................................................................................................18

6.1 MAIN BOARD...................................................................................................................18

6.2 PWPC BOARD .................................................................................................................22

7. PCB LAYOUT ........................................................................................................................25

7.1 MAIN BOARD...................................................................................................................25

7.2 PWPC BOARD .................................................................................................................27

7.3 KEYPAD BOARD .............................................................................................................28

8. MAINTAINABILI TY................................................................................................................28

8.1 EQUIPMENTS AND TOOLS REQUIREMENT .................................................................28

8.2 TROUBLE SHOOTING ....................................................................................................29

9.WHITE-BALANCE, LUMI NANCE ADJUS TMENT .................................................................35

10. EDIT CONTENT...................................................................................................................36

11. BILL OF MATERIAL LIST ...................................................................................................37

12.DEFINITION OF PIXEL DEFECTS.......................................................................................53

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DELL E152FPc

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7.3 KEYPAD BOARD

















8. MAINTAINABILITY
8.1 EQUIPMENTS AND TOOLS REQUIREMENT
Voltage meter.

Oscilloscope.

Pattern Generator.

DDC Tool with a IBM Compatible Computer.

Alignment Tool.

LCD Color Analyzer.

Service Manual.

User Manual.

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DELL E152FPc

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8.2 TROUBLE SHOOTING
8.2.1 MAIN BOARD
1.NO SCREEN APPEAR






































































Note: 1. If Replace “MAIN-BOARD ”, Please re-do “DDC-content” programmed & “WHITE-Balance”.

2. If Replace “Inverter Board ” only, Please re-do “ WHITE-Balance”

Yes, all DC level exist

No DC Level
Measured U402 pin 3 = 5 V?

Measured U402 pin 2= 3.3V?

Measured U401pin 2 =1.8V?

Check Power board, is there DC level output?

Check Correspondent component.

Is there any shortage or cold solder?

Check Power Board.

Yes. there have OSD show
Disconnected the Signal cable (Loose the

Signal cable), Is the screen show Block

WRGB color bars?
Connected the Signal cable again,

Check LED status.

Led Green

Replace U200

Scalar IC

No, nothing is show

Connected the Signal cable again,

Check LED status.
Check Power switch is in Power-on

status, and check if Power switch

had been stuck?

Led Orange

OK, Keyboard no stuck

Led orange
Led Green

Check the Wire-Harness from CN301

Measured RGB (R116, R106, R111) H, V

Input at U200 pin 85,86, was there have

signal?

Check Correspondent

component short/open

(Protection Diode)

and Signal cable bad ?
NG

OK, Wire tight enough

Check Panel-Power Circuit Block

OK, Panel Power OK

Check U200 Data-output Block

OK, U200 data OK

Replace Inverter board and Check

Inverter control relative circuit

Re-do White balance adjust

OK, input Normal

Measured Crystal X200 (12.00MHz)

OK, clock normal

Replace U200 (GMZan3)

OK

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DELL E152FPc

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Fig. 1. Bright dot defect description (two adjacent)






* Adjacent two dots in horizontal direction will be considered as one dot

Fig. 2. Dark dot defect description (two adjacent)

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DELL E152FPc

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Fig. 3. Minimum distance between dot defects

bright dot - to - bright dot





dark dot - to - dark dot



* Adjacent two dots in horizontal direction will be considered as one dot.

* A minimum distance criterion is applied for dots defect only.

* Will be not considered the distance between dot & mechanical defect.

* Will be not considered the distance between bright dot & dark dot.

* A dot which is over the half (50%) of pixel size will be considered as one bright dot.

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