Dynex LC-22HV40 User manual

CONTENTS
Safety precautions………………………………………………………………………..…
Alignment instructions …………………………….…….…………………………………
Method of software upgrading……………………………………………………………..
Method of flash writing………………………………………………………………………
Working principle analysis of the unit……………………………….………….………….
Block diagram…………………………………..………………………………….…………
IC block diagram………………………………………………………………………..……
Wiring diagram …………………………………………………………………………….
Troubleshooting guide ………………………………………………………………..……
Schematic diagram…………………………………………………………………………
APPENDIX-A: Assembly list
APPENDIX-B: Exploded View
1
3
7
14
16
17
18
26
27
32

1
Safety precautions
1. Instructions
Be sure to switch off the power supply before replacing or welding any components or
inserting/plugging in connection wire Anti static measures to be taken (throughout the entire
production process!):
a) Do not touch here and there by hand at will;
b) Be sure to use anti static electric iron;
c) It’s a must for the welder to wear anti static gloves.
Please refer to the detailed list before replacing components that have special safety requirements.
Do not change the specs and type at will.
2. Points for attention in servicing of LCD
2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to
use the screen of the original model for replacement.
2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in
protecting yourself and the machine when testing the system in the course of normal operation or
right after the power is switched off. Please do not touch the circuit or the metal part of the module
that is in operation mode. Relevant operation is possible only one minute after the power is
switched off.
2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or
damage to the set.
2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,
laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc.
Otherwise bad effect will result.
2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into
the module, be sure to cut the power off immediately and do not move anything on the module lest it
should cause fire or electric shock due to contact with the high voltage or short circuit.
2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at
once. Likewise, if the screen is not working after the power is on or in the course of operation, the
power must be cut off immediately and no more operation is allowed under the same condition.
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the
power is off because in this case relatively high voltage still remains in the capacitor of the driving
circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.
2.8 When operating or installing LCD please don’t subject the LCD components to bending, twisting
or extrusion, collision lest mishap should result.
2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary
to pay attention to anti static. Before servicing LCD TV make sure to take anti static measure and
ensure full grounding for all the parts that have to be grounded.
2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or
moving the set please take care not to touch or scratch them. Once they are damaged the screen
Attention: This service manual is only for service personnel to take reference with. Before
servicing please read the following points carefully.

2
would be unable to work and no way to get it repaired.
If the connection wires, connectors or components fixed by the thermotropic glue need to disengage
when service, please soak the thermotropic glue into the alcohol and then pull them out in case of
damage.
2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead to
breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong case
before the transportation or handling.
2.12 For the storage make sure to put it in a place where the environment can be controlled so as to
prevent the temperature and humidity from exceeding the limits as specified in the manual. For
prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in one
place. The ambient conditions are tabulated as follows:
Temperature Scope for operation 0 ~ +50 oC
Scope for storage -20 ~ +60 oC
Humidity Scope for operation 20% ~ 85%
Scope for storage 10% ~ 90%
2.13 Display of a fixed picture for a long time may result in appearance of picture residue on the
screen, as commonly called “ghost shadow”. The extent of the residual picture varies with the
maker of LCD screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain
in the picture for a period of time (several minutes). But when operating it please avoid displaying
still picture in high brightness for a long time.
3. Points for attention during installation
3.1 The front panel of LCD screen is of glass. When installing it please make sure to put it in place.
3.2 For service or installation it’s necessary to use specified screw lest it should damage the screen.
3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between
the screen and the glass will affect the receiving and viewing effect
3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and
insulation please take care to keep it in intactness so as to avoid hidden trouble.
3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or mounting.

3
Alignment instructions
1. Test equipment
VG-848 (YPbPr, VGA signal generator)
VG849 (HDMI signal generator)
CA210 (white balancer)
2 Alignment flow-chart
2.1 power test
Connect all boards according the wiring diagram and power on, test the voltage of XV04 and
the data is shown in table1.
Table1 voltage of XV04 pins
Pin 1 2 3 4 5, 6 7, 8 9 10 11 12 13
Min.(V) 4.85 0 4.85 0 14.80 0 4.65 3.40 0 31.40 0
Typ.(V) 5.00 0 5.00 0 15.00 0 4.80 3.50 0 32.00 0
Max.(V) 5.35 0 5.35 0 15.75 0 5.00 3.60 0 32.60 0
2.2 alignment flow-chart
The alignment flow-chart is shown as fig-1
Check if DDC, HDCP KEY and FLASH are written
Input AV/SVIDEO signal source and check the functions
Combined test for general assembly (check if the power is 120V)
Produce the data processing board
Connect to the center signal source and check if various
functions of TV (station leaking, analog control), earphone
and speaker output are normal
Input HD signal source and check YPbPr function
Input VGA signal source and check the display, various
functions (analog control) and H/V center.
White balance adjustment

4
Fig-1 adjustment flow-chart
3 Adjustment instruction
3.1 Unit adjustments
3.1.1 Connect all the boards according to wiring diagram, connect with power and observe the
display.
3.1.2 Method for using factory menu:
a) Press “INPUT”, “2”, “5”, ”8” and “0” one by one to enter level-one factory menu;
b) Press “▲” and “▼” to move the cursor to the adjustment page of the level-one factory menu
then press “ENTER” or “►”to enter;
c) Press “▲” and “▼” to move the cursor up and down;
d) When the cursor move to a certain adjust item, press “◄” and “►“ to adjust value;
e) Press “MENU” to exit to the previous factory menu;
f) Press “EXIT” to exit the factory menu;
g) After exit the factory menu, press “SLEEP” to enter the factory menu again as long as power on.
h) “Power on mode” item of “Other setting” menu: on= turn on; off =standby; memory=memory
function of turn on
3.2 White balance adjustment
3.2.1 Before adjustment
Before adjustment, the unit should keep working for over 30 minutes to be in a stable status. Use
BBY channel of CA210 and only adjust the color temperature of 9300K(COOL). In order to make
sure the color temperatures of 8000K and 6500K are up to the master, please keep the color
temperature of light level be X=285±2 Y=293±2 and the low level be X=285±5 Y=293±5 when
adjusting.
3.2.2 Four groups white balance adjustments
3.2.2.1 ATV adjustment (same for AV, S-VIDEO)
VD AGC Gain correction: select the 21 channel in AIR mode, enter factory menu VD AGC Setting
and select VD AGC Gain, press “►” till display “OK”, then press “MENU” to return to the previous
menu.
White balance adjustment: enter the factory menu Color Temp, set Color Mode to Cool first, a
11-step gray scale picture will appear, fix Gain Green, adjust Gain Red, Gain Blue to let the color
coordinate of the ninth level to be (285, 293); fix Offset Green, adjust Offset Red, Offset Blue to let
the color coordinate of the third level to be (285, 293). Adjust Gain Red, Gain Blue, Offset Red and
Offset Blue repeatedly until the value of the two levels gray scale are (285, 293) then press MENU
to return to the previous menu or press Save to EEPROM to store the value.
Check if the color temperatures of Normal and Warm are up to the mustard, if not, adjust Gain Red,
Preset ex-factory
Check the accessories and pack
Input HDMI signal source and check the display, various
functions (analog control) and H/V center.

5
Gain Blue, Offset Red and Offset Blue till they are accord with the requirement.
3.2.3.2 DTV adjustment (same for HDMI)
Select the 26 channel in AIR mode, enter the factory menu Color Temp, set Color Mode to Cool first,
a 11-step gray scale picture will appear, fix Gain Green, adjust Gain Red, Gain Blue to let the color
coordinate of the ninth level to be (285, 293); fix Offset Green, adjust Offset Red, Offset Blue to let
the color coordinate of the third level to be (285, 293). then press MENU to return to the previous
menu or press Save to EEPROM to store the value.
Check if the color temperatures of Normal and Warm are up to the mustard, if not, adjust Gain Red,
Gain Blue, Offset Red and Offset Blue till they are accord with the requirement.
3.2.2.3 YPbPr adjustment
ADC correction: Input 480i/60Hz signal of 75% color bar and gray scale to YPbPr (VG848 Timing
968, Pattern 918), enter the factory menu ADC Setting and perform ADC Auto.
White balance adjustment: input 1920x1080I/60Hz of 8-level gray scale signal to YPbPr from
VG848 YPbPr channel, enter the factory menu Color Temp, set Color Mode to Cool first, fix Gain
Green, adjust Gain Red, Gain Blue to let the color coordinate of the seventh level to be (285, 293);
fix Offset Green, adjust Offset Red, Offset Blue to let the color coordinate of the second level to be
(285, 293). Adjust Gain Red, Gain Blue, Offset Red and Offset Blue repeatedly until the value of the
two levels gray scale are (285, 293) then press MENU to return to the previous menu or press Save
to EEPROM to store the value.
Check if the color temperatures of Normal and Warm are up to the mustard, if not, adjust Gain Red,
Gain Blue, Offset Red and Offset Blue till they are accord with the requirement.
3.2.2.4 VGA adjustment
ADC correction: Input VESA 800x600/60Hz signal of chess to VGA (VG848 Timing 854, Pattern
914), enter the user menu ADVANCED and perform AUTO to display the whole picture, enter the
factory menu ADC setting and perform ADC Auto to correct ADC.
White balance adjustment: input 800x600I/60Hz of 8-level gray scale signal to VGA from VG848
VGA channel, enter the factory menu Color Temp, set Color Mode to Cool first, fix Gain Green,
adjust Gain Red, Gain Blue to let the color coordinate of the seventh level to be (285, 293); fix
Offset Green, adjust Offset Red, Offset Blue to let the color coordinate of the second level to be
(285, 293). Adjust Gain Red, Gain Blue, Offset Red and Offset Blue repeatedly until the value of the
two levels gray scale are (285, 293) then press MENU to return to the previous menu or press Save
to EEPROM to store the value.
Check if the color temperatures of Normal and Warm are up to the mustard, if not, adjust Gain Red,
Gain Blue, Offset Red and Offset Blue till they are accord with the requirement.
4 Performance check
4.1 TV function
Connect RF terminal with central signal source, enter Channel menu and perform auto search,
check if there are channels be skipped. Check the speaker and the picture. Especially notice that
the single should include NTSC and ATSC.
4.2 AV/S-Video terminals
Input AV/S signal, check if the picture and sound is normal.
4.3 YPbPr/YCbCr terminal
Input YUV signal (VG848 signal), separately input the signal of table2 and check if the display and
sound is normal.

6
Table2 YUV signal format
No. Resolution H-frequency (kHz) V-frequency (Hz) Pixel clock pulse
frequency (MHz) Remark
1 720x480i 15.734 59.94/60 13.5 480i
2 720x480p 31.469 59.94/60 27.00 480p
3 1280x720p 44.96 59.94 74.18 720p(59p)
4 1280x720p 45.00 60.00 74.25 720p(60p)
5 1920x1080i 33.75 59.94 74.25 1080i(59i)
6 1920x1080i 33.75 60.00 74.25 1080i(60i)
7 1920x1080p 67.43 59.94 148.35 1080p(59p)
8 1920x1080p 67.5 60 149.00 1080p(60p)
4.4 VGA terminal
Input the VGA signal (VG848 signal generator), separate input format signal of table3 and check the
display and sound. If the image is slight deflection of the H-field, press “Advance” of OPTION menu
to do auto correction.
Table3 VGA signal format
No. Resolution H-frequency (kHz) V-frequency (Hz) Pixel clock pulse
frequency (MHz) Remark
1 720x400@70Hz 31.47 70.08 28.32 IBM
2 640x480@60Hz 31.50 60.00 25.18 Industry
3 800x600@60Hz 37.90 60.00 40.00 VESA
4 1024x768@60Hz 48.40 60.00 65.00 VESA
5 1280x1024@60Hz 63.98 60.02 108.00 VESA
6 1680x1050@60Hz 64.67 59.88 119.00 VESA
4.5 HDMI terminal
Input HDMI signal (VG848 signal generator), separate input signal of table2 and check the display
and sound.
5 presetting before ex-factory
Enter the factory menu and select Shipment, the unit will preset the data automatically. Perform the
step after factory menu adjustment. SHIPMENT will perform the steps below:
1) Clear the program information of the channel
2) Clear VCHIP information
3) Default setting of user analog
4) Set Menu Language to English
5) Set AIR/CABLE to AIR
6) Power on mode is Off
6. Software instruction
Table4 software instruction
No. Code No. Type Function Written before
paste
Method

7
NC4 5272501601 S25FL016 Main CPU
program
Yes Written with instrument like
ALL11, write-protection
refers to note1.
NC2 5272404002 AT24C04 HDCP KEY Yes
NB14 5272402002 AT24C02 HDMI EDID Yes
NB09 5272402002 AT24C02 VGA EDID Yes
Written with instrument like
ALL11
Note1: the method of write-protection setting: enter ALL-100 interface, select Config, press “config
setting” and set “Protect” to “ALL Protect”, set “SRWD” to “Enable”. Select “config” when writing. The
“write-protect” will be set again when ALL-100 program restart.
Method of software update
Please follow listed below steps:
1. Copy all files to your computer, Include three files
ISP_Tool_V43.exe: Debug Tool software for Dynex to update
Dynex_32HV36_new.bin: New software for Dynex 32 LCD，(Note: Maybe the update
filename no as same as Dynex_32hv36_new.bin, the filename only for example)
Dynex32_software_update.doc: Document of software update
2. Cable Connect
The debug tool board one port connect your computer LPT, the other port connect to
Dynex32LCD RS232.
3. Connect the Dynex to Power Socket. The Power LED will turn Red. You can update the
software at TV Power on of TV Standby.
4. Run Debug Tool Software
Double click the file of ISP_Tool_V43.exe , then you can see the follow picture.

8
5. Click the icon of Device (If not the first time to run this software we can skip step 5)
Set the Device information as below

9
6. Click the icon of Connect
7. If cable connect is ok, you can get the follow picture. If failure please double check the cable
connect and try again.

10
8. Click the icon of Read
Click the follow Icon of Read

11
to Select the update software for Dynex
Select Open Icon. Then will appear the follow picture.
Open

12
9. Click the Icon of Auto
Then will appear the follow picture

13
Please click the Icon of Run, the software will be updated to Dynex.
It will take about 10 minutes.
10. If update software is finished and OK, It will appear PASS. If error please retry the step from 2
to 9.

14
11. Please disconnect the Dynex from Power Socket, untill the Power LED no light, then
reconnect the Dynex to Power Socket and Power on the TV.
Method of FLASH writing
1. Using ALL-100
1) Enter AUTO interface and select “Config”. Note: you must select “Config” when writing Flash.
2) Press “Config Setting”, set “Protect” to “All Protect:, “SRWD” to “Enable” and press OK to finish
the write-protect setting. The above two items should be reset again when you exit ALL-100
program and enter again. Please update ALL-100 program if there is no SRWD.

15
2. Use Mstar writing tool on line
1) Open the tool, press “Device”
(1) Select WP Pin pull to high during ISP
(2) Select New Setting Below
(3) Select Status Register Bit2 Bit3 Bit4 Bit7 and the write-protect setting is finish
2) Make sure that the write-protect setting is correct

16
Working principle analysis of the unit
The analog and digital RF signal received by antenna will be sent to integrative tuner
TUNER1(TD1636AF, contains HF and IF amplifier circuits), which selects appropriate channel and
sends the selected IF signal to the next level by the control of SDA, SCL.
The analog RF signal sent to tuner, via high amplify and mixed frequency to get IF signal VIF.
Then it will be divided into two ways, one way will be sent to acoustic surface-wave ZJ1 to IF filter
and get better IF characteristics, then it will be sent to NJ2(M61111FP) through pin20, 21 to do
intermediate amplification, phase-locked loop VCO and synchronous wave detection and output
VIDEO-TV(ATV) from pin1; another way will be sent to acoustic surface-wave JZ4 to IF filter and
gent better IF characteristics, then it will be sent to NJ2(M61111FP) to do intermediate amplification
and wave detection and output SIF from pin10.
The digital RF via high amplify and mixed frequency in the tuner, output differential digital IF
signal from pin10, 11, the signal will be sent to NJ02(MSD809) to do intermediate amplification and
demodulation, then demodulate the transform stream TS which contains video/audio and other
information.
ATV, SIF, TS, audio/video signal of AV, S-VIDEO and VGA; YPbPr video/audio signal and
HDMI audio/video signal, all of the signals will be sent to the main IC NC1(MSD119CL) switch
select, video decode and process.
In MSD119CL, TS of DTV via TS demultiplex, distinguish the different programs and pick-up
the corresponding audio /video stream and data stream, after MPEG-2 uncompress, video coder
and audio D/A transform, recover the analog video signal YCbCr and audio signal L/R.
All of the video data (include DTV video) via switch select, video decode and process will be
sent to MSD119CL to do D/A transition, image scale, OSD superposition, then LVDS conversion to
signal acceptable for LCD panel, namely four pairs of low differential signals and one pair of clock
signal, then it will be sent to LCD panel for picture display.
All of the audio signals will be sent to MSD119CL to do audio switch selection and sound
effect processing, then output L/R to sound amplifier NV10 (R2S15117) amplifying to speaker.
The unit is control by the MCU built in MSD119CL, it connects tuner, MSD809 and E2PROM
through IIC bus line and controls the whole unit working.

17
Block diagram
TUNER M61111
AV
S-VEDIO-Y/C
YPBPR
VGA
HDMI
RS232
Controller
MSD119BL
D
D
R
R
A
M
R
A
M
P
A
N
E
L
24LC02EDID
AV/S-VEDIO
AUDIO L/R
ATV
SIF
AUDIO L/R
AUDIO L/R
Sound amplifie
r
R2A15117
LVDS
MSD809 TS
DIF
VIF
耳机 BH3547
CS4344
IIS
software

18
IC Block diagram
1. M61111FP
The M61111FP is a semiconductor integrated circuit built-in the PLL inter-carrier method VIF/SIF
dedicated to NTSC. The circuit includes the VIF amplifier, image waveform detection, APC
detection, IF/RF, AGC, VCO, AFT, LOCK DET, EQ, AF amplifier, limitter, FM waveform detector
circuits, and acts as a small tuner.