FILE NO.
SERVICE MANUAL AVP4232
PRODUCT CODE No.
PRODUCT CODE No.
PDP TV
1 682 345 30: NTSC-M, ATSC
REFERENCE No.:SM0915029
CONTENTS
Safety precautions………………………………………………………………………..…
Alignment instructions …………………………….…….…………………………………
Method of software upgrading……………………………………………………………..
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
15
16
26
27
32
Attention: This service manual is only for service personnel to take reference with. Before
servicing please read the following points carefully.
Safety Precautions
Please read the “Points for attention for the Maintenance & Repair of PDP” and “Criterion for
Identifying the Defects on Screen” as below, before inspecting and adjusting the TV set.
1. “Points for attention for the Maintenance & Repair of PDP”
To avoid possible danger, damage or jeopardy to health and to prevent PDP screen from new
damage, the maintenance people must read the following carefully. If they ignore the following
warnings, there will be deathful risks:
1.1 Screens vary from one model to another and therefore not interchangeable. Be sure to use the
same type of screen in the replacement.
1.2 The operation voltage is approximately 350V for PDP module (including screen, driving circuit,
logic circuit and power module). If you want to conduct maintenance work on PDP module when the
set is in normal operation or just after the power is off, you must take proper measures to avoid
electric shock and never have direct contact or touch with the circuitry of the working module or
metal parts. That’s because within a short time relatively high voltage still remains on the capacitor
of the driving part even after the power is off. Make sure to begin relevant maintenance operation at
least one minute after the power is off.
1.3 Don’t apply on the module any power supply that is higher than the specification. If the power
supply used deviates from the value given in the specification, there might be a possibility of leading
to fire or damage to the module.
1.4 Never have operation or mounting work under unsuitable environment such as areas in the
vicinity of water – bathroom, laundry, water chute of kitchen – sources of fire, heat-radiation parts or
direct exposure to sunlight. Otherwise there will be kickbacks.
1.5 In case foreign substances such as water, liquid, metal slices or others fall into the module
carelessly power must be cut off immediately. Keep the module as it is and do not move anything on
the module. Otherwise it might be possible to contact the high voltage or cause shock short circuit
so that it may lead to fire or electric shock.
1.6 If there is smoke, abnormal smell or sound from the module, please cut the power off
immediately. Likewise in case the screen doesn’t work when the power is on or during the operation,
please also cut off the power at once. No more operation in this case.
1.7 Do not remove or plug its connection wire when the module is in operation or right after the
power is off. That’s because there remains a relatively high voltage on the capacitor of the driving
circuit. If there is a need to remove or plug in the connection wire, please wait at least one minute
after the power is off.
1.8 Considering the module has a glass faceplate, please avoid extrusion by external force lest it
should cause glass breakage that may get people injured. Two people are needed in cooperation to
move this module lest contingency takes place.
1.9 The complete TV set is designed on the basis of full consideration of thermal dissipation by
convection, with the round hole on the top for heat emission. To avoid overheat, please do not have
any covering on the hole during normal operation and never put it in the place where the space is
narrow and in bad ventilation.
1
1.10 There is quite a number of circuits in PDP that are integrated ones. Please be on guard against
static electricity. During maintenance operation be sure to cover yourself with anti-static bag and
before operation make sure to have it sufficiently grounded.
1.11 There are a big number of connection wires distributed around the screen. Please take care
not to touch or scuff them during maintenance or removing the screen, because once they are
damaged the screen will fail to work and it’s not possible to repair it.
If the connection wires, connectors or components fixed by the thermotropic glue need to disengage
when service, please soak the thermosopic glue into the alcohol and then pull them out in case of
damage.
1.12 Connector for the circuit board of the screen part is relatively fine and delicate. Please take
care in the replacement operation lest it should get damaged.
1.13 Special care must be taken during transportation and handling because strenuous vibration
could lead to screen glass breakage or damage on the driving circuitry. Be sure to use a strong
outer case to pack it up before transportation or handling.
1.14 Please put it for storage in an environment in which the conditions are under control so as to
prevent the temperature and humidity from exceeding the scope stipulated in the specification. For
prolonged storage please cover it with anti-moisture bag and have them piled and stored in one
place. The environmental conditions are tabulated as below:
Temperature Scope for operation 0~50centigrade
Scope for storage -15~60centigrade
Humidity Scope for operation 20%~80%
Scope for storage 20%~80%
1.15 If a fixed picture is displayed for a long time, difference in its brightness and color may occur
compared with movable pictures. But it doesn’t show any problem and the reason is that there is
reduced density of fluorescent powder in the former. On the other hand, even if changes take place
in the picture, it can keep its brightness for a period of time (several minutes). It’s a feature inherent
with plasma and it’s not abnormal. However please try as much as possible to avoid showing a still
picture of high brightness for a long time during operation.
1.16 As a digitalized display devise, this module is provided with error diffusion technology and the
gray scale and false enhancement of contour can be displayed by reusing of sub-field. As compared
with cathode ray tube, it can be found in the moving picture that at the brim of the face of a person
there are some wrong colors.
1.17 During the display of graph (indicating the gradual change in brightness horizontally or
vertically) resulting from gray scale test it can be found that the brightness for the two adjacent
levels is uneven. This is caused by the reuse of sub-field, the display of load rectification and the
electrolysis.
1.18 The screen front plate is of glass. Please make sure that the screen has been put in place
during erection. If it is not in place before the erection begins it may lead to screen crack or
breakage.
1.19 Make sure the screw used in the mounting of the screen is of the original specs lest it should
cause damage to the screen due to mismatch. Special care should be taken not to use too long or
too big screw.
1.20 Care must be taken to guard against dust during assembling or dismantling, especially to avoid
2
dirt from falling in between the screen and the glass lest it should harm the receiving and viewing
effect.
1.21 There is piece of insulator stuck on the rear chassis corresponding to the power supply board.
It is used to isolate the cool part from the hot part. Please take care to keep it intact lest it should
become a potential safety trouble.
1.22 In addition to plasma screen, the glass is a part of high value. It has such functions as
anti-radiation, adjustment of color temperature etc. Please handle it carefully.
Alignment instructions
1. Test equipment
VG-848 (YPbPr, VGA signal generator)
CA210 (white balancer)
2 Alignment flow-chart
The alignment flow-chart is shown as fig-1
Connect to the center signal source and check if various
functions of TV (station leaking, analog control), earphone
and speaker output are normal
Input AV/SVIDEO signal source and check the functions
Input HD signal source and check the function
Input VGA signal source and check the display, various
functions (analog control) and H/V center.
Input HDMI signal source and check the display, various
functions (analog control) and H/V center.
Insert the USB device and check the function
Check if DDC and FLASH are written
Produce the digital processing board
Combined test for general assembly
White balance adjustment
3
Preset ex-factory
Check the accessories and pack
Fig-1 adjustment flow-chart
3 Unit adjustments
Connect all the boards according to wiring diagram, connect with power and observe the display.
3.1 Method for using factory menu:
a) Press “INPUT”, “2”, “5”, ”8” and “0” in turn to enter level-one factory menu;
b) Press “CH+” and “CH-” to move the cursor to the adjustment page of the level-one factory menu
then press “OK” to enter;
c) Press “CH+” and “CH-” to move the cursor up and down;
d) When the cursor move to a certain adjust item, press “ VOL+” and “VOL –“ to adjust value;
e) Press “MENU” to exit to the level-one 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 “Otherseting” 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.
a) In VGA channel, input VESA800*600/60HZ chessboard signal(VG848 Timing 854, pat 914),
enter user menu ADVANCE and perform AUTO to let picture display integrity, enter the factory
menu ADC Setting and perform ADC AUTO to do ADC correction.
b) In YPbPr channel, input 480i/60HZ 75%color bar and gray scale signal (VG848 Timing 968, PAT
918), enter the factory menu ADC Setting and perform ADC AUTO.
3.2.2 Four groups white balance adjustments (HDMI and VGA)
Allowable error range is below:
a) 12000K:
The white balance error range of the gray scale lower than 10IRE: X=(-15, +15) Y=(-50, +50)
The white balance error range of the gray scale between 10IRE and 30IRE: X=(-10, +10) Y=(-20,
+20)
The white balance error range of the gray scale higher than 30IRE: X=(-5, +5) Y=(-15, +15)
b) 9300K:
The white balance error range of the gray scale lower than 10IRE: X=(-15, +15) Y=(-50, +50)
The white balance error range of the gray scale between 10IRE and 30IRE: X=(-10, +10) Y=(-20,
+20)
The white balance error range of the gray scale higher than 30IRE: X=(-5, +5) Y=(-15, +15)
c) 6500K:
The white balance error range of the gray scale lower than 10IRE: X=(-15, +15) Y=(-50, +50)
The white balance error range of the gray scale between 10IRE and 30IRE: X=(-10, +10) Y=(-20,
+20)
4
The white balance error range of the gray scale higher than 30IRE: X=(-5, +5) Y=(-15, +15)
For BESTBUY, it needs to check if the white balance of 50IRE gray scale is up to the mustard at
9300K and 6500K (BBY channel of CA210).
3.2.2.1 ATV channel adjustment (same for AV, S-VIDEO)
Input 21-channel signal to the TV AIR, enter the factory menu “Color Temp”, set “Color Mode” to
COOL, 1 1-gray scale will display, fixed G GAIN, adjust R GAIN, B GAIN to let the color coordinate of
the ninth level be (272, 278); fixed G OFF, adjust R OFF, B OFF to let the color coordinate of the
third level be (272, 278). Adjust R GAIN, B GAIN, R OFF and B OFF repeatedly until the value of
the two levels gray-scale are (272, 278) then press MENU return to the previous menu or press
SAVE TO EEPROM to store the value.
Check if the color temperature of NORMAL and WARM is up to the mustard, if not, adjust
R-GAIN/B-GAIN/R-OFF/B-OFF till accord with the requirement.
3.2.2.2 DTV channel adjustment (same for HDMI)
Input 26-channel signal to the TV AIR, enter the factory menu “Color Temp”, set “Color Mode” to
COOL, 1 1-gray scale will display, fixed G GAIN, adjust R GAIN, B GAIN to let the color coordinate of
the ninth level be (272, 278); fixed G OFF, adjust R OFF, B OFF to let the color coordinate of the
third level be (272, 278) then press MENU return to the previous menu or press SAVE TO EEPROM
to store the value.
Check if the color temperature of NORMAL and W ARM is up to the must ard, if not, adjust R GAIN/ B
GAIN/R OFF/B OFF till accord with the requirement.
3.2.2.3 YPbPr channel adjustment
Input 1920*1080I/60Hz 8-level gray scale signal of VG848 to YPbPr, enter the factory menu “Color
Temp”, set “Color Mode” to COOL, fixed G GAIN, adjust R GAIN, B GAIN to let the color coordinate
of the seventh level be (272, 278); fixed G OFF, adjust R OFF, B OFF to let the color coordinate of
the second level be (272, 278). Adjust R GAIN, B GAIN, R OFF and B OFF repeatedly until the
value of the two levels gray-scale are (272, 278) then press MENU return to the previous menu or
press SAVE TO EEPROM to store the value.
Check if the color temperature of NORMAL and W ARM is up to the must ard, if not, adjust R GAIN/ B
GAIN/R OFF/B OFF till accord with the requirement.
3.2.2.4 VGA channel adjustment
Input 800*600/60Hz 8-level gray scale signal of VG848 to VGA, enter the factory menu “Color
Temp”, set “Color Mode” to COOL, fixed G GAIN, adjust R GAIN, B GAIN to let the color coordinate
of the seventh level be (272, 278); fixed G OFF, adjust R OFF, B OFF to let the color coordinate of
the second level be (272, 278). Adjust R GAIN, B GAIN, R OFF and B OFF repeatedly until the
value of the two levels gray-scale are (272, 278) then press MENU return to the previous menu or
press SAVE TO EEPROM to store the value.
Check if the color temperature of NORMAL and W ARM is up to the must ard, if not, adjust R GAIN/ B
GAIN/R OFF/B OFF till 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 A V/S-Video terminals
5
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 table1 and check if the display and
sound is normal.
Table1 YUV signal format
No. Resolution
1
2
3
4
5
6
7
8
720x480i 15.734 59.94/60 13.5 480i
720x480p 31.469 59.94/60 27.00 480p
1280x720p 44.96 59.94 74.18 720p(59p)
1280x720p 45.00 60.00 74.25 720p(60p)
1920x1080i 33.75 59.94 74.25 1080i(59i)
1920x1080i 33.75 60.00 74.25 1080i(60i)
1920x1080p 67.5 60 149.00 1080p(60p)
1920x1080p 67.43 59.94 148.35 1080p(59p)
H-frequency
(kHz)
V-frequency
(Hz)
Pixel clock pulse
frequency (MHz)
Remark
4.4 VGA terminal
Input the VGA signal (VG848 signal generator), separate input format signal of table1 and table2
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.
Table2 VGA signal format
No. Resolution
720x400 31.469 70.086 28.322 IBM (1)
1
640x480 31.469 59.94 25.175 IBM
2
800x600 37.879 60.317 40 VESA
3
1024x768 48.363 60.004 65 VESA
4
1360x768 47.71 60.01 85.50 VESA
5
H-frequency
(kHz)
V-frequency (Hz)
Pixel clock pulse
frequency (MHz)
Remark
4.5 HDMI terminal
Input HDMI signal (VG848 signal generator), separate input signal of table1 and check the display
and sound.
4.6 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) Menu Language is English
5) Set AIR/CABLE to AIR
6) Power on mode is Off
6
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.
7
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
6. Click the icon of Connect
8
7. If cable connect is ok, you can get the follow picture. If failure please double check the cable
connect and try again.
8. Click the icon of Read
9
Click the follow Icon of Read
to Select the update software for Dynex
10
Select Open Icon. Then will appear the follow picture.
Open
9. Click the Icon of Auto
11
Then will appear the follow picture
Please click the Icon of Run, the software will be updated to Dynex.
It will take about 10 minutes.
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10. If update software is finished and OK, It will appear PASS. If error please retry the step from 2
to 9.
1 1. 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.
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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 deferential 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 AV1, AV2, S-VIDEO and VGA; YPbPr video signal selected
by switch NB5(PI5V330) from YPbPr1 and YPbPr2; YPbPr audio signal selected by switch NB09
(HEF4052) from YPbPr1 and YPbPr2; HDMI audio/video signal selected by switch NA4 (PS321)
from HDMI1, HDMI2, HDMI3; 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.
AV, S-Video and ATV output from M61111FP will be sent to MSD119CL video switch, A/D
convert and digital decode. The video selected by switch embed in MSD119CL will be sent out in
two ways: one is sent to decode and process; the other is AV OUT.
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 PDP panel, namely four pairs of low differential signal and one pair of clock
signal, then it will be sent to PDP 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 (R2S15112FP) amplifying to speaker.
The audio L/R also sends to AV OUT.
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.
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Block diagram
VGA
YPbPr 1
YPbPr 2
S Video
AV 1
AV 2
HDMI 1
HDMI 2 HDMI 3
PS321
P15V330
TNUER TD1636AF
VIF
M61111FP
ATV
Y/C
DIF
SIF
IIC
MSD809
TS
IIC
BH3547F
MSD119BL
R2A15112FP
earphone socket
CS4344
I2S
256M DDR
PANEL
2M Flash
VGA Audio
YPbPr Audio 1
YPbPr Audio 2
4052
RS232
15
AV Out
fiber output
KEY
IR
IC block diagram
1. M61111FP
The M61111 FP i s a se m ic onductor 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.
16
2. MSD119BL
The MSD119BL is a highly integrated ASIC for LCD/PDP DTV applications with resolutions up to
1080P. It is configured with an integrated triple-ADC/PLL, a multi-standard TV video and audio
decoder, a motion adaptive video de-interlacer, a scaling engine, the MStarACE-3 color engine, an
advanced 2D graphics engine, a transport processor, a high-definition (HD) MPEG video decoder, a
24-bit DSP for MPEG audio decoding, a DVI/HDCP/HDMI receiver, and a peripheral control unit
providing a variety of HDTV control functions.
The MSD119BL comprises an MPEG-2 transport processor with advanced section filtering
capability, an MPEG-2(MP@HL profile) video decoder, a Dolby* Digital (AC-3)/MPEG layer I and II
digital audio decoder with analog audio outputs that are designed to support ATSC HD/SDTV
programs while handling ATSC CC and EPG. Furthermore, it is also possible to decode MPEG-4,
JPEG, MP3 formats from external sources such as USB interfaces.
For analog TV, the MSD119BL includes NTSC/PAL/SECAM multi-standard video decoder
comprising a 3-D motion adaptive comb filter and time-based correction, and a BTSC/A2/EIA-J
audio decoder to support worldwide television standards. In addition, the MStar advanced LCD TV
processor enhances video quality, motion adaptive de-interlacer, picture quality adjustment units,
and MStarACE-3 color engine.
By integrating peripherals including USB 2.0 host controller, UART, IR, SPI, I2C, and PWM, the
MSD119BL fulfills all requirements in advanced DTV sets. To further reduce system costs, the
MSD119BL also integrates intelligent power management control capability for green-mode
requirements and spread-spectrum support for EMI management.
17
18
3. MSD809
AGC Description
The AGC has two modes of operation. When the chip is powered up, the non-coherent IF AGC &
RF AGC will function first. The non-coherent AGC loop will provide the control voltage necessary for
proper gain control of the external gain amplifier and tuner in the RF section. The two AGC will
extend the dynamic range of power amplifier.
It automatically adjusts itself to any system with a matched filter. The automatic gain controller
(AGC) takes the input data stream from either the ADC output or the DC remover output, and
applies non-coherent detection of the gain level, and adjusts it to a pre-configured reference level.
The two AGC work exclusively in parallel; there is the AGC that feeds its output to the IF amplifier,
and the AGC that outputs to the tuner amplifier. The AGC also support manual mode, where one is
fixed to a pre-configured level, while the other performs normal AGC functions.
Demodulator Description
The first function of demodulator is to convert sampling clock to operation rate of two-times symbol
rate with interpolator. Interpolator generates operating rate clock of 21.52MHz from ADC rate of
24.69MHz with timing controller.
Demodulator also down-convert the received IF signal to near base-band signal. These functions
can compensate each estimated offsets from carrier recovery and symbol timing recovery.
Carrier recovery and symbol timing recovery estimate offsets perfectly in severe ghost environment.
Especially carrier recovery is able to track offsets in deep fading ghost environment with very weak
or no pilot tone.
19
20 21
4. PS321
22
Note:
Pins in RED are for I2C control mode with I2C-CTL-EN=HIGH
Pins in BLUE are for EDID bridge function when EDID-BRG-EN=HIGH
5. R2A15112FP
R2A15112FP is a Digital Power Amplifier IC developed for TV.
R2A15112FP has a maximum power of 15W (typ) x2ch. (VD=24V, THD=1%, SE) at a 4Ω load.
It is possible to replace a conventional analog amplifier with a digital amplifier easily.
23
24 25
Wiring diagram
left drive board
(Y drive)
power board
right drive board
(X drive)
to key board
to IR board
digital processing board
to speaker
bottom drive board
(Z drive)
ogical board
l
AV2 interface board
26
Trouble shooting
1. Fault clearance
Before servicing please check to find the possible causes of the troubles according to the table
below.
1.1 Antenna (signal):
Picture is out of focus or jumping Bad status in signal receiving
Poor signal
Check if there are failures with the electrical connector or
the antenna.
Check if the antenna is properly connected.
Fringe in picture Check if the antenna is correctly oriented.
Maybe there is electric wave reflected from hilltop or
building.
Picture is interfered by stripe shaped
bright spots
There appear streaks or light color
on the screen
1.2 TV set:
Symptoms Possible cause
Unable to switch the power on Check to see if the power plug has been inserted properly
No picture and sound Check to see if the power supply of liquid crystal TV has
Deterioration of color phase or color
tone
Screen position or size is not proper Check is the screen position and size is correctly set up.
Picture is twisted and deformed Check to see if the picture-frame ratio is properly set up.
Picture color changed or colorless Check the “Component” or “RGB” settings of the liquid
Possibly due to interference from automobile, train, high
voltage transmission line, neon lamp etc.
Maybe there is interference between antenna and power
supply line. Please try to separate them in a longer
distance.
Maybe the shielded-layer of signal wire is not connected
properly to the connector.
Check if interfered by other equipment and if interfered
possibly by the equipment like transmitting antenna,
non-professional radio station and cellular phone.
into the socket.
been switched on. (As can be indicated by the red LED at
the front of the TV set)
See if it’s receiving the signal that is transmitted from other
source than the station
Check if it’s connected to the wrong terminal or if the input
mode is correct.
Check if the signal cable connection between video
frequency source and the liquid crystal TV set is correct.
Check if all the picture setups have been corrected.
crystal TV set and make proper adjustment according to the
27
signal types.
Picture too bright and there is
distortion in the brightest area
Picture is whitish or too bright in the
darkest area of the picture
No picture or signal produced from
the displayer if “XXX in search”
appears.
There appears an indication “outside the receivable scope)
Remote control cannot work
properly
No picture and sound, but only
hash.
Blur picture Check if the antenna cable is correctly connected.
No sound Check if the “mute” audio frequency setting is selected.
When playing VHS picture search
tape, there are lines at the top or
bottom of the picture.
Check if the contrast setting is too high.
Possibly the output quality of DVD broadcaster is set too
high.
It maybe also due to improper terminal connection of the
video frequency signal in a certain position of the system.
Check if the setting for the brightness is too high
Possibly the brightness grade of DVD player (broadcaster)
is set too high.
Check if the cable is disconnected.
Check if it’s connected to the proper terminal or if the input
mode is correct.
Check if the TV set can receive input signal. The signal is
not correctly identified and VGA format is beyond the
specified scope.
Check if the batteries are installed in the reverse order.
Check if the battery is effective.
Check the distance or angle from the monitor.
Check if there is any obstruct between the remote control
and the TV set.
Check if the remote control signal- receiving window is
exposed to strong fluorescence.
Check if the antenna cable is correctly connected, or if it
has received the video signal correctly.
Of if it has received the right video signal.
Check if the sound volume is set to minimum.
Make sure the earphone is not connected.
Check if the cable connection is loose.
When being played or in pause VHS picture search tape
sometimes can’t provide stable picture, which may lead to
incorrect display of the liquid crystal TV, In this case please
press “auto” key on the remote control so as to enable the
liquid crystal TV set to recheck the signal and then to
display correct picture signal
28
2. Troubleshooting guide
k
f
f
p
d
f
p
n
p
2.1 No raster
Turn-on power supply, chec
if the red indicator is light in
the STANDBY?
no
Check if XV4 pin11 (5V) o
main board is normal?
no
Check STANDBY circuit o
ower supply board
Panel self-check
yes
Press POWER button in the
unit or remote control an
check the indicator.
blue
Check if VS, VA o
X5208/X5209/X5210 on the
ower board near the voltage
of the panel specification.
yes
no
Check the
ower board
red
Check if the PIN13 of XV4 o
main board is low-level?
yes
Check power
supply board
Check VV1,VV6
on CPU board
no
29
2.2 Raster, but no picture
y
p
d
p
Check if the unit button
and remote control
operation?
yes
no
no
Replace
main board
no
Enter factory-menu,
initialization EEPROM,
then turn off the TV,
turn on again, displa
icture?
Adjust main boar
Does display OSD
menu in screen when
ress menu button?
yes
again
yes
yes
Check if the all channels
have no signal?
no
Replace
main board
30
2.3 Picture, but no sound (TV input)
f
N
d
N
p
Check if PIN10,27 o
V10 is high-level?
yes
Check PIN12 and
PIN25 wave of NV10
no
Check if DV2 positive
terminal is low-level
low high
Check PIN76 and
PIN77 wave of NC1
Replace VV4
Replace NC1
Replace NV2
2.4 Picture, but no sound (channel except TV)
Check if PIN4,32
of NV10 is
normal?
yes
Check if PIN10 an
PIN27 of NV10 is
high level?
no
low
Check power board
Check if DV2 positive
terminal is low-level
low
Replace VV4
no
yes
high
yes
no
Check the
wave of NV10
in 12,25
high
Replace NC1
Replace NV10
Replace NC1
no
yes
Replace
V10
31
main board
main board
main board
main board
main board
power
power
APPENDIX-A: Main assembly AVP4232
NAME NO.
MAIN COMPONENT AND IT'S NO.
Digital processing board
AV interface board
IR board
Key board
Power board
Power filter board
Remote control
Panel
XI6HV0066910
XI6HV0062910
XI6HU0670910
XI6HU0670510
XI6HA01820A0
XI6FK01051A0
XI6010200103
XI5205422103
NC1
NJ2
NJ02
NA4
NV10
RC-201-0C
S42AX-YB03
MSD119CL (5270119002)
M61111FP (5276111101)
MSD809 (5270809003)
PS321TQF (5270321001)
R2A15112FP (5271511201)
AVP4232
PART LIST OF EXPLODED VIEW
NO. DESCRIPTION
1 Front cabinet
2 Key board
3
4 Digital processing board
5
6
7
8
9
10
11 IR board
12
13
Panel
Power filter board
Power board
Speaker
Back cabinet
Stand
AV interface board
User manual
Remote control
PART LIST
AVP4232 ver.1.0
REF.No. PARTS No. DESCRIPION Q'TY REMARK
1
2
3
4
5
6
7
8
9
10
11
12
13
Only the parts in above list are used for repairing.
Other parts except the above parts can't be supplied.
XI5QI31L207D
XI6HU0670510
XI6HV0066910
XI6FK01051A0
XI6HA01820A0
XI5HI31LH03B
XI6151076070
XI6HV0062910
XI6HU0670910
XI5944032330
XI6010200103
Front cabinet 1
Key board 1
Panel
Digital processing board 1
Power filter board
Power board
Speaker
Back cabinet
Stand
AV interface board
IR board 1
User manual
Remote control
1 SAMSUNG S42AX-YB03
1
1
1
1
1
1
1
1
May/2008
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