AOC F19s 18.5 inch LCD Monitor – how to update the software, SMPS circuit diagram

Firmware and DDC Instruction
Firmware Instruction (Reatek 2Bank RTD2120 ISP SOP)
Step 1:Connect
1. LPT cable connect PC and ISP board
2. VGA cable connect monitor and ISP board
1.LPT driver , Double click on the icon to install the Port95nt LPT
2.Driver ,Realtek 2blank ISP TOOL

Use BENQ G900W model for example：
1.Open Realtek_ ISP_ Tool ver4.8 program tool.

2.Select the “RTD 2120 ISP or NEW VER ISP” ，interface show as below：
3.If you program the 07 year model，there will only one F/W for it，Please Select the BANK 1.
4.If you use program two F/W model，Please Select the BOTH.

5.Click on the 0～64K botoun to load
BenQ_G900W_RTD2525LH_AUOM190P-W01_EU_DCR5_V003.hex file

6.Click on the 64K～96K to load EXTEND file or OSD file .IF load
BenQ_G900W_RTD2525LH_AUOM190P-W01_EU_DCR5_V003_EXTEND.hex file.

7.Click on the to start program ，if show“CheckSum OK”, you program it successfully.
8.At the same time, make sure the content “Checksum”in the red frame is in accordance with the frame at right corner loaded by software; if different, using the newest TOOL loading once more, if still no useful, maybe it’s a F/W bug; Please try another F/W version, or ask for another compressed format F/W from Factory for retrial.

Step4：CHECK F/W version：

Different mode, different customer, has different type of method accessing to default mode. As below, take FG981 mode for example:

1.Take off the 3-port connector on ISP loading card witch used for VGA cable, connect it to PC, then press MENU and AC ON/OFF monitor, when display normally, loose MENU, then press MENU again, there will be Default Menu showed on screen

2.Check “Model name” in FACTORY Service page, “panel”, & “F/W Version”:Version, data, whether the information is OK?

3. If all OK, set it to be “Gray Scale” or “---”pattern, select AUTO COLOR and running itself, the value of Gain & Offset will be gained automatism;

4. DC/ON, press MENU again, access into Customer model, select return to default model, press ENTER. Then out of “DFM” model, return to default set;

5. If for F/W upgrade or replacing Main Board, VGA won’t meet to suitable resolution.

DDC Instruction

(With DELL E178FP Model for example:）

Configure and procedure

System and equipment requirements

(1). A Pentium (or above) personal computer or compatible with the print port (LPT Port).

(2). Microsoft windows 98 and above. Recommend under windows XP.

(3). Install the print port driver “PORT95NT” as the diagram below, and then restart the computer.

(4). Tool require: ISP board (Part number: 715GT034-B)/printer cable/VGA cable/signal generator/DC 12V Adaptor.

(5). Software require as below

Open “ EDID” Folder, Double-click

(b) Choose methods: Loadfile/ldddc/ The first letter of the brand/ size/ Customer mode Such as: choose “Analog” and then click “Loadfile/ldddc/D/DELL/17DEL/DELL E178FP”

(c) Input the MFD.
PS: revise the time data (year/week) in PC system to make sure the time data is in accordance with that S/N shows.

(d) Key/Scan in the SN and Verify SN, then click “Program”, when the analog DDC Write complete

(e) When appear “D-SUB: PASS!” writer finished.
If it is writer digital EDID, appear writer finished.
If it is writer HDMI EDID, appear “HDMI: PASS!” writer finished.

(f) Click “read A(nolog) ” to Verify program is successful or not., digital EDID& HDMI EDID similarly.
Click “read D” to Verify program is successful or not.

Note：If the warning massages “Data compare ERROR” appears, Please refer to following check points.

You may forget to Pull out the cable to the signal generator, when start writing.
If PIN 5 of the VGA cable port to the monitor is grounding, appear can read cannot write phenomenon, cut it(PIN 5).

When write DVI EDID, appear can read cannot write phenomenon, please cut pin14 (the shortest pin) DVI cable port to the When write HDMI EDID, appear can read cannot write phenomenon, please cut pin 14(the shortest pin) HDMI cable port to the PC and after trying write.
Also please pay special attention: When write HDMI&VGA&DVI EDID and display “Data compare ERROR please check the TOOL power supply and PC LPT whether OK?
When write EDID appear the below picture, and it can be read but can’t written, please do as the following steps and the problem will be solved.

Click “READ” and it can be read, but can’t be written, please do as the below steps:

1. If analog EDID can’t be written, please cut pin9 which connect to the monitor.
2. If digital EDID can’t be written, please cut pin14 which connect to the monitor.
3. If HDMI EDID can’t be written, please cut pin14 which connect to the tool.

SMPS schematic