HP F1905E Series User manual

HP F1905E
SERVICE MANUAL
19〞LCD Monitor
F1905E Series
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.

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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 ---------------------------------------------------------------------08
4. Input/Output Specification ---------------- --------------------------------------------------- 09
4.1 Input Signal Connector --------------------------------------------------------------------09
4.1.1 Analog D-SUB Connector --------------------------------------------------------09
4.1.2 DVI-D Digital connector -------------------------------------------------------------09
4.2 Factory Preset Display Modes ----------------------------------------------------------10
4.3 Power Supply Requirements ------------------------------------------------------------11
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 -----------------------------------------------------------------16
6.3.1 Scalar Board ---------------------------------------------------------------------------16
6.3.2 Inverter/Power Board ----------------------------------------------------------------17

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7. Schematic -----------------------------------------------------------------------------------------19
7.1 Main Board -----------------------------------------------------------------------------------19
7.2 Inverter/Power Board -------------------------------------------------------------------23
8. PCB Layout ---------------------------------------------------------------------------------------26
8.1 Main Board -----------------------------------------------------------------------------------26
8.2 Inverter/Power Board ----------------------------------------------------------------------27
8.3 Keypad Board -----------------------------------------------------------------------------30
9. Maintainability ------------------------------------------------------------------------------------31
9.1 Equipments and Tools Requirements -------------------------------------------------31
9.2 Trouble Shooting ---------------------------------------------------------------------------32
9.2.1 Main Board ------------------------------------------------------------------------32
9.2.2 Power/Inverter Board -------------------------------------------------------------35
9.2.3 Key Pad Board -----------------------------------------------------------------------37
10. White-Balance, Luminance Adjustment ----------------------------------------------- 38
12. Check List After Replacing LCD Main Board ---------------------------------------------40
13. EDID Content -----------------------------------------------------------------------------------44
14. BOM List -----------------------------------------------------------------------------------------45

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Revision List
Revision Date TPV model name
A00 May.-09-06 T986KAVDKHHPAP

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1. Product Feature
48.3 cm (19”) a-si TFTActive matrix LCD panel, 0.294mm dot pitch
Scalar chipset: Genesis GM5321
Microprocessor controlled scan technology
Both VGA analog and DVI-D digital signal video inputs supported
450:1 Typical Contrast Ratio and 250-nits typical Brightness
Response time 20ms and Viewing Angle 140(Horizontal) and 120(Vertical)
15 factory presets, 10 user modes
Vertical refresh rate 50Hz to 76Hz; Horizontal frequency 30kHz to 83kHz
Resolutions: 640 x 480 up to 1280x1024, Max Pixel Modes: 140 MHz
Power Internal AC100V-240V
Tilt -5° to 35°
CE mark
TCO 03 mark
VESA DPMS compliant
VESA DDC2B compliant and DDC/CI interface.
2. LCD Monitor Description
The LCD Monitor will contain main board, power board, key board which house the flat panel
control logic, brightness control logic and DDC.
The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main
board chips each voltage.
Video signal, DDC
Power Board
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in
factory mode
HOST Computer
CCFT Drive.
AC-IN
100V-240V
Monitor Block Diagram

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3. Operation Instructions
3.1 General Instructions
Press the power button to turn the monitor on or off. The other control buttons are located on the
side of the front 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.

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3.2 Control Buttons

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3.3 Adjust the Picture
1. Brightness
Adjust the brightness.
2. Contrast Adjust the contrast
3. Image
Control
Adjust the:
 AutoAdjustment:Adjusts the main settings and produces a stable, centered
image.
 H-Position: horizontal position of the screen image.
 V-Position: vertical position of the screen image.
 Clock: frequency of the pixel clock to minimize vertical bar.
 Phase: phase value to minimize horizontal jitters.
4. Color
 9300K: recall 9300K color
 6500K: recall 6500K color
 SRGB: recall SRGB color
 Custom Color: adjusts the color tint of white, and the red, green, and blue (RGB)
mix for colors.
5. Language Shows the language of the OSD window.
6. Management
 Power Saver: enable/disable power saving
 Power On Recall: enable/disable power recall
 Mode Display: enable/disable mode display
 Sleep Timer: set sleep timer
 Basic Menu: set to basic menu
7. OSD Control OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen
Display window.
8. Information Current setting, recommended setting, serial number, total hours, backlight hours,
Exit.
9. Factory
Reset Resets the display to original factory settings for color, brightness, phase, and clock.
10. Exit Exit the current OSD window.

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4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 Analog D-SUB Connector
PIN MNEMONIC SIGNAL PIN MNEMONIC SIGNAL
1 RV Red Video 9 +5 V +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 None 12 SDA DDC Data
5 GND
Ground (DDC Return) 13 HS Horizontal Sync
6 RG Red GND 14 VS Vertical Sync
7 GG Green GND 15 SCL DDC Clock
8 BG Blue GND
VGA connector layout
PIN 1 PIN 5
PIN 11
4.1.2 DVI-D Digital connector
PIN MNEMONIC SIGNAL PIN MNEMONIC SIGNAL
1 TX 2 - TMDS Data 2 - 13 TX 3 + TMDS Data 3 +
2 TX 2 + TMDS Data 2 + 14 +5V +5V Power (from PC)
3 SHLD 2 / 4 TMDS Data 2 / 4 Shield 15 GND Ground (Return for +5V)
4 TX 4 - TMDS Data 4 - 16 HPD Hot Plug Detect (connect internally to
pin-14)
5 TX 4 + TMDS Data 4 + 17 TX 0 - TMDS Data 0 -
6 DDC Clk DDC Clock 18 TX 0 + TMDS Data 0 +
7 DDC Data DDC Data 19 SHLD 0 / 5 TMDS Data 0 / 5 Shield
8 N/C No Connect 20 TX 5 - TMDS Data 5 -
9 TX 1 - TMDS Data 1 - 21 TX 5 + TMDS Data 5 +
10 TX 1 + TMDS Data 1 + 22 TX CLK SHLD TMDS Clock Shield
11 SHLD 1 / 3 TMDS Data 1 / 3 Shield 23 TX CLK + TMDS Clock +
12 TX 3 - TMDS Data 3 - 24 TX CLK - TMDS Clock -

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DVI-D digital connector layout
4.2 Factory Preset Display Modes
Factory Pre-set Video Input Modes
Pre-set Pixel Format Horizontal
Frequency (kHz)
Vertical Frequency
(Hz)
1 640 x 480 31.5 60.0
2 640 x 480 37.9 72.0
3 640 x 480 37.5 75.0
4 720 x 400 31.5 70.0
5 800 x 600 37.9 60.0
6 800 x 600 48.1 72.0
7 800 x 600 46.9 75.0
8 832 x 624 49.7 75.0
9 1024 x 768 48.4 60.0
10 1024 x 768 56.5 70.0
11 1024 x 768 60.0 75.0
12 1152 x 900 68.7 75.6
13 1152 x 900 71.7 76.0
14 1280 x1024 63.9 60.0
15 1280 x1024 80.0 75.0