AOC L1506 Service Manual

HP L1506 Service Manual

SERVICE MANUAL

15” LCD Monitor

L1506

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 RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

HP L1506 Service Manual

Table of Contents

Table of Contents --------------------------------------------------------------------------------------------------------------------------------- 02

Revision List---------------------------------------------------------------------------------------------------------------------------------------- 04

1.Product Feature----------------------------------------------------------------------------------------------------------------------------------05

2.LCD Monitor Description --------------------------------------------------------------------------------------------------------------------05

3.Operation Instructions -------------------------------------------------------------------------------------------------------------------------06

3.1 General Instructions -----------------------------------------------------------------------------------------------------------------------06

3.2 Control Button ----------------------------------------------------------------------------------------------------------------------------07

3.3 Adjusting The Picture -------------------------------------------------------------------------------------------------------------------07

4. Input/Output Specification ----------------------------------------------------------------------------------------------------------------- 09

4.1 Input Signal Connector -----------------------------------------------------------------------------------------------------------------09

4.2 Factory Preset Display Modes ---------------------------- ---------------------------------------------------------------------------10

4.3 Power Supply Requirements ---------------------------------------------------------------------------------------------------------10

5.Panel Specification -------------------------------------------------------------------------------------------------------------------------11

5.1 General Feature --------------------------------------------------------------------------------------------------------------------------11

5.2 Optical Characteristics -----------------------------------------------------------------------------------------------------------------12

6. Block Diagram --------------------------------------------------------------------------------------------------------------------------------13

6.1 Monitor Exploded View--------------------------------------------------------------------------------------------------------------------13

6.2 Software Flow Chart-----------------------------------------------------------------------------------------------------------------------14

6.3 Electrical Block Diagram ---------------------------------------------------------------------------------------------------------------15

6.3.1 Scalar Board ------------------------------------------------------------------------------------------------------------------------15

6.3.2 Inverter/Power Board ----------------------------------------------------- -- -- -- -- ------------------------------------------------16

HP L1506 Service Manual

7. Schematic --------------------------------------------------------------------------------------------------------------------------------------18

7.1 Main Board -------------------------------------------------------------------------------------------------------------------------------18

7.2 Power Board -----------------------------------------------------------------------------------------------------------------------------24

8. PCB Layout ------------------------------------ ------------------------------ ------------------------------------------------------------------26

8.1 Main Board ---------------------------------- ---------------------------------------------------------- ------------------------------------26

8.2 Inverter/Power Board -------------------------------------------------------- ------------------------------ -----------------------------27

8.3 Key board ---------------------------------------------------------------------------------------------------------------------------------28

9. Maintainability ---------------------------------------------------------------------------------------------------------------------------------29

9.1 Equipments and Tools Requirements ----------------------------------------------------------------------------------------------29

9.2 Trouble Shooting ------------------------------------------------------------------------------------------------------------------------30

9.2.1 Main Board ---------------------------------------------------------------------------------------------------------------------------30

9.2.2 Power/Inverter Board --------------------------------------------------------------------------------------------------------------33

9.2.3 Key Pad Board --------------------------------------------------------------------------------------------------------------------35

10. White-Balance, Luminance Adjustment -------------------------------------------------------------------------------------------- 36

11. Check List after replacing LCD Main board -------------------------------------------------------------------------------------------37

12. EDID Content ---------------------- ------------------------------ ------------------------------ ------------------------------------------------41

13. BOM List ------------------------ ---------------------------------------------------------- ------------------------------------------------42～66

HP L1506 Service Manual

Revision List

Revision Date Change Description TPV Model name

A00 Jun-21-05 Initial release T560KC4DKHHPNP

1. Product Feature

LCD Panel

Driving system TFT Color LCD

Panel CLAA150XP02 Size 38.1cm(15.0") Pixel pitch 0.297mm( H )x 0.297mm( V ) Viewable angle 130˚ (H) 100˚ (V) Response time (typ.) <16 ms Brightness(Min) 250 Contrast 400:1 Video Analog /Digital Sync. Type H/V TTL

Input

H-Frequency 30kHz – 63kHz V-Frequency 50-76Hz

Display Colors Over 16 million Colors

HP L1506 Service Manual

Dot Clock 80MHz Max. Resolution 1024 x768 Plug & Play VESA DDC2BTM

Power Consumption ON Mode OFF Mode

Screen Size

Environmental Considerations

MAIN DIMENSIONS

Weight (N. W.)

Horizontal : 306mm Vertical : 230 mm

Operating Temp: 5°C to 35°C Storage Temp.: -20°C to 60°C Operating Humidity : 20% to 80%

Packaged(W*H*D) 395mm*395mm*155mm Unpackaged(W*H*D) 340mm*355mm*203mm

Packaged Unpackaged

<23W <1W

≤4.6Kg Unit ≤3.5Kg Unit

2. LCD Monitor Description

The LCD Monitor will contain main board, power board, key board and which house the flat panel control logic,

brightness control logic and DDC.

HP L1506 Service Manual

The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each

voltage.

Monitor Block Diagram

CCFT Drive.

Flat Panel and CCFL backlight

Power Board

Keyboard

Main Board

RS232 Connector For white balance adjustment in factory mode

DC-IN

12V

HOST Computer

Video signal, DDC

3. Operation Instructions

3.1 General Instructions

Press the power button to turn the monitor on or off. The other control buttons are located at front of the panel. By changing these settings, the picture can be adjusted to your personal performance.

The power cord should be connected and insert to adaptor.

Connect the video cable from the monitor to the computer VGA card.

- Press the power button to turn on the monitor , the power indicator will light up to Green.

3.2 Control Buttons

- Power Button:

HP L1506 Service Manual

When pressed, the monitor enters the off mode, and the LED turns blank. Press a gain to restore normal status.

- Left / Right Button:

When the OSD show on screen, Left/Right Button are used to control the monitor functions. Press to switch functions or adjust settings. And if the OSD off, Left buttons is used to automatically set the H Position, V Position, Clock and Phase.

- Power Indicator:

Green — Power On mode. Orange — Power Saving mode. Blank —Power Off Mode.

Manu Left / Down Right / Up Power

A. Menu button / Exit

B. Left/(Down) button / Auto button C. Up button D. Power button

3.3 Adjust the Picture

Brightness

HP L1506 Service Manual

Adjust the brightness.

Contrast Adjust the contrast

Adjust the:

z Auto Adjustment: Adjusts the main settings and produces a stable, centered image. Image Control

Color

Language Shows the language of the OSD window.

Management

OSD Control

z H-Position: horizontal position of the screen image.

z V-Position: vertical position of the screen image.

z Clock: frequency of the pixel clock to minimize vertical bar.

z Phase: phase value to minimize horizontal jitters.

z 9300K: recall 9300K color

z 6500K: recall 6500K color

z SRGB: recall SRGB color

z Custom Color: adjusts the color tint of white, and the red, green, and blue (RGB) mix

for colors.

z Power Saver: enable/disable power saving

z Power On Recall: enable/disable power recall

z Mode Display: enable/disable mode display

z Sleep Timer: set sleep timer

z Basic Menu: set to basic menu

OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen Display

window.

10.

Information Current setting, recommended setting, serial number, total hours, backlight hours, Exit. Factory

Reset Exit Exit the current OSD window.

Resets the display to original factory settings for color, brightness, phase, and clock.

4. Input/Output Specification

4.1 Input Signal Connector

PIN MNEMONIC SIGNAL PIN MNEMONIC SIGNAL

1 RV Red Video 9 +3.3/+5 V +3.3/+5 V (from PC) 2 GV Green Video 10 SG Sync Ground

3 BV Blue Video 11 NC

4 5 6 RG Red GND 14 VS Vertical Sync

GND

No Connect

Ground (DDC

Return)&Cable Detect

12 SDA DDC Data 13 HS Horizontal Sync

None (Reserved for Factory

Use)

7 GG Green GND 15 SCL DDC Clock 8 BG Blue GND

VGA connector layout

HP L1506 Service Manual

PIN 1

PIN 11

PIN 5

4.2 Factory Preset Display Modes

Pixel

Horz Freq

Horz

Vert Freq

HP L1506 Service Manual

Vert

Pixel Clk

Preset

1 640 x 480 31.469 - 59.940 - 25.175 VGA 2 640 x 480 37.861 - 72.809 - 31.500 VESA 3 640 x 480 37.500 - 75.000 - 31.500 VESA 4 720 x 400 31.469 - 70.087 + 28.322 VGA 5 800 x 600 37.879 6 800 x 600 48.077 + 72.188 + 50.000 VESA 7 800 x 600 46.875 + 75.000 + 49.500 VESA 8 832 x 624 49.726 ± 74.551 ± 57.284 MAC

9 1024 x 768 48.363 - 60.004 - 65.000 VESA 10 1024 x 768 56.476 - 70.069 - 75.000 VESA 11 1024 x 768 60.023 + 75.029 + 78.750 VESA 12 1152 x 870 68.68 - 75.06 - 100.000 Mac 13 1152 x 900 71.71 - 76.05 - 105.561 Sun 14 1280 x 1024 63.98 + 60.02 + 108.000 VESA 15 1280 x 1024 79.97 + 75.02 + 135.000 VESA

Format

(KHz)

Polarity

(Hz)

60.317 + 40.000 VESA

Polarity

(MHz) Source

4.3 Power Supply Requirements

PARAMETER RANGE

AC Input Voltage 90 to 265V

AC Input Frequency 47 to 63 Hz

Inrush Current 50A MAX AT 220VAC and 30A AT 120VAC

Leakage Current 5 mA MAX at 120VAC

Power consumption ≤23W

HP L1506 Service Manual

5. PANEL SPECIFICATION

5.1 General Feature

5.2 Optical Characteristics

HP L1506 Service Manual

6. Block Diagram

6.1 Monitor Exploded View

HP L1506 Service Manual

6.2 Software Flow Chart

6 4 3

HP L1506 Service Manual

1) MCU initialize.

2) Is the eeprom blank?

3) Program the eeprom by default values.

4) Get the PWM value of brightness from

eeprom. Check the pin PANEL1 and PANEL2

to tell which panel to get with it.

5) Is the power key pressed?

Turn on the LED and set it to green color.

Scalar initializes.

any signals coming?

digital port?

6) Clear all global flags.

7) Are the AUTO and SELECT keys pressed?

8) Enter factory mode.

9) Saving the power key status into eeprom.

10) In standby mode?

11) Update the lifetime of back light.

12) Check the analog and digital port, are there

13) Does the scalar send out a interrupt request?

14) Wake up the scalar.

15) Are there any signals coming from analog or

16) Display " No Input Signal " message. And go into standby mode after the message disappear.

17) Program the scalar to be able to show the coming mode.

18) Process the OSD display.

19) Read the keyboard. Is the power key

pressed?

6.3 Electrical Block Diagram

(

Vsy

6.3.1 Scalar Board Block Diagram

HP L1506 Service Manual

Control Interface

MCU

U601)

OSD

(KEYPAD)

EPR_SDA EPR SCL

EEPROM

(U602)

Panel Interface

(CN503)

Scalar TSU17AK

(Include ADC, OSD)

(U401)

RXD TXD

D-Sub Connector

R G B

(CN301)

Hsync,

DB15_SDA DB15 SCL

DDC_SDA DDC SCL

EEPROM

(U301)

6.3.2 Inverter / Power Board Block Diagram

HP L1506 Service Manual

Inverter Block Diagram

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