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
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	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

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			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

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		HP L1506 Service Manual
	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
Dot Clock	80MHz
Max. Resolution	1024 x768
Plug & Play	VESA DDC2BTM
Power Consumption	ON Mode	<23W
	OFF Mode	<1W
Screen Size	Horizontal : 306mm
	Vertical : 230 mm
Environmental	Operating Temp: 5°C to 35°C
	Storage Temp.: -20°C to 60°C
Considerations
	Operating Humidity : 20% to 80%
MAIN DIMENSIONS	Packaged(W*H*D)	395mm*395mm*155mm
	Unpackaged(W*H*D)	340mm*355mm*203mm
Weight (N. W.)	Packaged	≤4.6Kg Unit
	Unpackaged	≤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.

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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			Main Board
								RS232 Connector
								For white balance
								adjustment in
								factory mode
		Keyboard
DC-IN							Video signal, DDC
					HOST Computer
12V

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:

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HP L1506 Service Manual

When pressed, the monitor enters the off mode, and the LED turns blank. Press again 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

3.3Adjust the Picture

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1. Brightness

2. Contrast

Image

3.Control

4. Color

5. Language

6. Management

7. OSD Control

8. Information

9.Factory Reset

10. Exit

HP L1506 Service Manual

Adjust the brightness.

Adjust the contrast

Adjust the:

zAuto Adjustment: Adjusts the main settings and produces a stable, centered image.

zH-Position: horizontal position of the screen image.

zV-Position: vertical position of the screen image.

zClock: frequency of the pixel clock to minimize vertical bar.

zPhase: phase value to minimize horizontal jitters.

z9300K: recall 9300K color

z6500K: recall 6500K color

zSRGB: recall SRGB color

zCustom Color: adjusts the color tint of white, and the red, green, and blue (RGB) mix for colors.

Shows the language of the OSD window.

zPower Saver: enable/disable power saving

zPower On Recall: enable/disable power recall

zMode Display: enable/disable mode display

zSleep Timer: set sleep timer

zBasic Menu: set to basic menu

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

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

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

Exit the current OSD window.

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	None (Reserved for Factory
						Use)
	4	NC	No Connect	12	SDA	DDC Data
	5	GND	Ground (DDC	13	HS	Horizontal Sync
			Return)&Cable Detect
	6	RG	Red GND	14	VS	Vertical Sync
	7	GG	Green GND	15	SCL	DDC Clock
	8	BG	Blue GND
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HP L1506 Service Manual

VGA connector layout

PIN 1	PIN 5
PIN 11

4.2 Factory Preset Display Modes

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HP L1506 Service Manual

	Pixel	Horz Freq	Horz	Vert Freq	Vert	Pixel Clk
Preset	Format	(KHz)	Polarity	(Hz)	Polarity	(MHz)	Source
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	+	60.317	+	40.000	VESA
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

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

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5. PANEL SPECIFICATION

5.1 General Feature

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5.2 Optical Characteristics

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HP L1506 Service Manual

6. Block Diagram

6.1 Monitor Exploded View

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HP L1506 Service Manual

6.2 Software Flow Chart

1

2 Y 3

N

4

5 N

Y

6

7 N 8

Y

9

10	N	11
Y
N 12		13	N
Y		Y
14		15	N	16
		Y
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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?

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. Turn on the LED and set it to green color. Scalar initializes.

10)In standby mode?

11)Update the lifetime of back light.

12)Check the analog and digital port, are there any signals coming?

13)Does the scalar send out a interrupt request?

14)Wake up the scalar.

15)Are there any signals coming from analog or digital port?

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?

18	N 19
	Y

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HP L1506 Service Manual

6.3 Electrical Block Diagram

6.3.1 Scalar Board Block Diagram

Panel Interface

(CN503)

Scalar TSU17AK

MCU

(U601)

(Include ADC, OSD)

EPR_SDA

(U401)

R

DDC_SDA

EPR SCL

RXD

Hsync,

G

DDC SCL

TXD

B

Vsync

OSD

EEPROM

D-Sub Connector

EEPROM

Control Interface

(KEYPAD)

(U602)

(CN301)

(U301)

DB15_SDA

DB15 SCL

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HP L1506 Service Manual

6.3.2 Inverter / Power Board Block Diagram

Inverter Block Diagram

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