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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HP F1905E |
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Table of Contents |
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Table of Contents ---------------------------------------------------------------------------------- |
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Revision List ---------------------------------------------------------------------------------------- |
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1.Product Feature -------------------------------------------------------------------------------- |
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2.LCD Monitor Description ----------------------------------------------------------------------- |
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3.Operation Instructions -------------------------------------------------------------------------- |
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3.1 General Instructions ----------------------------------------------------------------------- |
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3.2 Control Button ------------------------------------------------------------------------------- |
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3.3 Adjusting The Picture --------------------------------------------------------------------- |
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4. Input/Output Specification ---------------- --------------------------------------------------- |
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4.1 Input Signal Connector -------------------------------------------------------------------- |
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4.1.1 Analog D-SUB Connector -------------------------------------------------------- |
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4.1.2 DVI-D Digital connector ------------------------------------------------------------- |
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4.2 |
Factory Preset Display Modes ---------------------------------------------------------- |
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4.3 |
Power Supply Requirements ------------------------------------------------------------ |
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5.Panel Specification --------------------------------------------------------------------------- |
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5.1 |
General Feature ---------------------------------------------------------------------------- |
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5.2 |
Optical Characteristics -------------------------------------------------------------------- |
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6. Block Diagram ----------------------------------------------------------------------------------- |
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6.1 |
Monitor Exploded View ------------------------------------------------------------------ |
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6.2 |
Software Flow Chart ----------------------------------------------------------------------- |
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6.3 |
Electrical Block Diagram ----------------------------------------------------------------- |
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6.3.1 Scalar Board ------------------------------------------------------------------------- |
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6.3.2 Inverter/Power Board ---------------------------------------------------------------- |
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HP F1905E |
7. Schematic ----------------------------------------------------------------------------------------- |
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7.1 Main Board ----------------------------------------------------------------------------------- |
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7.2 |
Inverter/Power Board ------------------------------------------------------------------- |
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8. PCB Layout --------------------------------------------------------------------------------------- |
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8.1 |
Main Board ----------------------------------------------------------------------------------- |
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8.2 |
Inverter/Power Board ---------------------------------------------------------------------- |
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8.3 Keypad Board ----------------------------------------------------------------------------- |
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9. Maintainability ------------------------------------------------------------------------------------ |
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9.1 |
Equipments and Tools Requirements ------------------------------------------------- |
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9.2 Trouble Shooting --------------------------------------------------------------------------- |
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9.2.1 Main Board ------------------------------------------------------------------------ |
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9.2.2 Power/Inverter Board ------------------------------------------------------------- |
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9.2.3 Key Pad Board ----------------------------------------------------------------------- |
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10. |
White-Balance, Luminance Adjustment ----------------------------------------------- |
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12. |
Check List After Replacing LCD Main Board --------------------------------------------- |
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13. |
EDID Content ----------------------------------------------------------------------------------- |
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14. |
BOM List ----------------------------------------------------------------------------------------- |
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3
HP F1905E
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Revision List |
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TPV model name |
Revision |
Date |
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A00 |
May.-09-06 |
T986KAVDKHHPAP |
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4
HP F1905E
1.Product Feature
48.3cm (19”) a-si TFT Active 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.
Monitor Block Diagram
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CCFT Drive. |
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Flat Panel and |
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CCFL backlight |
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Power Board |
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Main Board |
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RS232 Connector |
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For white balance |
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adjustment in |
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factory mode |
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Keyboard |
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AC-IN |
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Video signal, DDC |
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HOST Computer |
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100V-240V |
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5
HP F1905E
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.
6
HP F1905E
3.2 Control Buttons
7
HP F1905E
3.3 Adjust the Picture
1. |
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Brightness |
Adjust the brightness. |
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Contrast |
Adjust the contrast |
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Adjust the: |
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Auto Adjustment: Adjusts the main settings and produces a stable, centered |
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Image |
image. |
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H-Position: horizontal position of the screen image. |
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3. |
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Control |
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V-Position: vertical position of the screen image. |
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Clock: frequency of the pixel clock to minimize vertical bar. |
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Phase: phase value to minimize horizontal jitters. |
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9300K: recall 9300K color |
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6500K: recall 6500K color |
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Color |
SRGB: recall SRGB color |
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Custom Color: adjusts the color tint of white, and the red, green, and blue (RGB) |
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mix for colors. |
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Language |
Shows the language of the OSD window. |
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Power Saver: enable/disable power saving |
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Power On Recall: enable/disable power recall |
6. |
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Management |
Mode Display: enable/disable mode display |
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Sleep Timer: set sleep timer |
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Basic Menu: set to basic menu |
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7. |
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OSD Control |
OSD (on Screen Display) settings: adjusts the H/V position, timeout, On Screen |
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Display window. |
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8. |
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Information |
Current setting, recommended setting, serial number, total hours, backlight hours, |
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Exit. |
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9. |
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Factory |
Resets the display to original factory settings for color, brightness, phase, and clock. |
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Reset |
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Exit |
Exit the current OSD window. |
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8
HP F1905E
4. Input/Output Specification
4.1 Input Signal Connector
4.1.1 Analog D-SUB Connector
PIN |
MNEMONIC |
SIGNAL |
PIN |
MNEMONIC |
SIGNAL |
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1 |
RV |
Red Video |
9 |
+5 V |
+5 V (from PC) |
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GV |
Green Video |
10 |
SG |
Sync Ground |
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BV |
Blue Video |
11 |
NC |
None (Reserved for Factory Use) |
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4 |
NC |
None |
12 |
SDA |
DDC Data |
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5 |
GND |
Ground (DDC Return) |
13 |
HS |
Horizontal Sync |
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6 |
RG |
Red GND |
14 |
VS |
Vertical Sync |
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7 |
GG |
Green GND |
15 |
SCL |
DDC Clock |
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8 |
BG |
Blue GND |
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VGA connector layout
PIN 1 |
PIN 5 |
PIN 11 |
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4.1.2 DVI-D Digital connector
PIN |
MNEMONIC |
SIGNAL |
PIN |
MNEMONIC |
SIGNAL |
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1 |
TX 2 - |
TMDS Data 2 - |
13 |
TX 3 + |
TMDS Data 3 + |
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2 |
TX 2 + |
TMDS Data 2 + |
14 |
+5V |
+5V Power (from PC) |
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3 |
SHLD 2 / 4 |
TMDS Data 2 / 4 Shield |
15 |
GND |
Ground (Return for +5V) |
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Hot Plug Detect (connect internally to |
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4 |
TX 4 - |
TMDS Data 4 - |
16 |
HPD |
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pin-14) |
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5 |
TX 4 + |
TMDS Data 4 + |
17 |
TX 0 - |
TMDS Data 0 - |
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6 |
DDC Clk |
DDC Clock |
18 |
TX 0 + |
TMDS Data 0 + |
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7 |
DDC Data |
DDC Data |
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SHLD 0 / 5 |
TMDS Data 0 / 5 Shield |
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8 |
N/C |
No Connect |
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TX 5 - |
TMDS Data 5 - |
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9 |
TX 1 - |
TMDS Data 1 - |
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TX 5 + |
TMDS Data 5 + |
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10 |
TX 1 + |
TMDS Data 1 + |
22 |
TX CLK SHLD |
TMDS Clock Shield |
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11 |
SHLD 1 / 3 |
TMDS Data 1 / 3 Shield |
23 |
TX CLK + |
TMDS Clock + |
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12 |
TX 3 - |
TMDS Data 3 - |
24 |
TX CLK - |
TMDS Clock - |
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9
HP F1905E
DVI-D digital connector layout
4.2 Factory Preset Display Modes
Factory Pre-set Video Input Modes
Pre-set |
Pixel Format |
Horizontal |
Vertical Frequency |
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Frequency (kHz) |
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1 |
640 x 480 |
31.5 |
60.0 |
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2 |
640 x 480 |
37.9 |
72.0 |
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3 |
640 x 480 |
37.5 |
75.0 |
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4 |
720 x 400 |
31.5 |
70.0 |
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5 |
800 x 600 |
37.9 |
60.0 |
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6 |
800 x 600 |
48.1 |
72.0 |
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7 |
800 x 600 |
46.9 |
75.0 |
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8 |
832 x 624 |
49.7 |
75.0 |
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9 |
1024 x 768 |
48.4 |
60.0 |
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10 |
1024 x 768 |
56.5 |
70.0 |
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11 |
1024 x 768 |
60.0 |
75.0 |
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12 |
1152 x 900 |
68.7 |
75.6 |
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13 |
1152 x 900 |
71.7 |
76.0 |
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14 |
1280 x1024 |
63.9 |
60.0 |
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15 |
1280 x1024 |
80.0 |
75.0 |
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10
HP F1905E
4.3 Power Supply Requirements
PARAMETER |
RANGE |
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AC Input Voltage |
90 to 265V |
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AC Input Frequency |
47 to 63 Hz |
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Inrush Current |
50A MAX AT 220VAC and 30A AT 120VAC |
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Leakage Current |
5 mA MAX at 120VAC |
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Power consumption |
<70W |
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5.Panel Specification
5.1General Feature
11
HP F1905E
5.2 Optical Characteristics
12
HP F1905E
6. Block Diagram
6.1 Monitor Exploded View
13
HP F1905E
6.2 Software Flow Chart
1
Y
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N
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5 |
N |
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Y |
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N
7 8
Y
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N |
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Y |
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N |
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13 |
N |
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Y |
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Y |
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15 |
N |
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Y |
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18 N 19
Y
14
HP F1905E
REMARK:
1)MCU initialize.
2)Is the EEprom blank?
3)Program the EEprom by default values.
4)Get the PWM value of brightness from EEprom.
5)Is the power key pressed?
6)Clear all global flags.
7)Are the AUTO and SELECT keys pressed?
8)Enter factory mode.
9)Save the power key status into EEprom. Turn on the LED and set it to green color. Scalar initialize.
10)In standby mode?
11)Update the lifetime of back light.
12)Check the analog port, are they’re any signals coming?
13)Does the scalar send out an interrupt request?
14)Wake up the scalar.
15)Are there any signals coming from analog port?
16)Display "No connection Check Signal Cable" 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?
15
HP F1905E
6.3 Electrical Block Diagram
6.3.1 Scalar Board Block Diagram
16
HP F1905E
6.3.2 Inverter / Power Board Block Diagram
Inverter Block Diagram
17
HP F1905E
Power Block Diagram
18