Xoceco PS-32HU35S Schematic

PDP TELEVISION
PS-32HU35S
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
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20 25
Note: This maintenance manual is intended only for the reference of the maintenance people. Please pay attention to the following points before carrying out the maintenance work.
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.
1.10 There is quite a number of circuits in PDP that are integrated ones. Please be on guard against
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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 thermotropic 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 dirt from falling in between the screen and the glass lest it should harm the receiving and viewing
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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
PM5518 (video signal generator) VG-848 (VGA, HDMI signal generator) VG-849 (digital video signal generator) CA210 (color analyzer)
2. Power test
Connect main board, power board and IR board according the wiring diagram, connect the power and press “standby” to turn on the TV. Test the pin voltage of XS15, the data is shown in table1:
Table1 voltage data of XS15
Pin1 Pin2 Pin3 Pin4 Pin5 Pin6 Pin7 Pin8 Pin9 Pin10 Pin11
LC-26HUXX 8.55-9.45V 0 4.75-5.5V 0 11.69-12.92V 0 4.75-5.5V 0 H
LC-32HUXX 8.55-9.45V 0 4.85-5.36V 0 11.4-12.6V 0 4.85-5.36V 0 H
Test the pin voltage of XS16, the data is shown in table2:
Table2 voltage data of XS16
Pin1 Pin2 Pin3 Pin4 Pin5 Pin6
LC-26HUXX 0 4.75-5.5V 0 8.55-9.45V 0 30.4-33.6V
LC-32HUXX 0 4.85-5.36V 0 8.55-9.45V 0 31.36-32.64V
Test the pin voltage of XS11, the data is shown in table3:
Table3 voltage data of XS11
Pin1 Pin2 Pin3 Pin4 Pin5
LC-26HUXX 20.25-23.63V 0
LC-32HUXX 22.8-25.2V 0
3. Alignment flow-chart
The alignment flow-chart is shown as fig-1
Check DDC, FLASH, HDCP and power control IC
Combined test for general assembly
3
Factory initialization setup
IF channel voltage of TV and AGC voltage adjustment
White balance adjustment
Performance check
Preset ex-factory
Fig-1 adjustment flow-chart
4. Adjustment instruction
4.1 Unit adjustments Connect all the boards according to wiring diagram, then power on and observe the display. Method for entering factory menu: press “INPUT”, “2”, “5”, ”8” and “0” in turn to enter factory menu; press “CH+” and “CH-” to select adjustment items and press “VOL+” and “VOL-” to adjust value items, press “MENU” repeatedly to exit. Method for software upgrading: When software upgrading please enter factory menu first, select ISP of OPTION, set ISP to 1 and you can begin to upgrade. After upgrade finished, it needs to set ISP back to 0. If the picture can’t display when upgrading, it needs to solder JB1 on main board. Please unsolder JB1 again after upgrading.
4.2 Initialization Enter factory menu, select “OPTION”, “EEPROM” and “HOTEL OPTION” sub-menu, adjustment of items to see table4.
Table1 sub-menu adjustment
Items Preset Introduce
HOTEL 0 1: HOTEL OPTION of factory menu is optional
0: HOTEL OPTION of factory menu is not optional
LOGO 1 1: display LOGO in no signal or turn on
0: no LOGO display
ADC PRESCALE 046 Software will preset the data according unit
SIF PRESCALE 02E Software will preset the data according unit
BACK LIGHT FF Software will preset the data according the type of panel
ALL COLOR 1 1: white balance of each channel auto offset based on the HDMI white
balance
0: white balance of each channel adjust the offset base separately
Note: don’t set ALL COLOR to 1after the offset adjustment, if you do so, the
adjusted parameter of each channel will recover to the parameter of HDMI.
EEPROM-MEMORAY
RECALL
> EEPROM Initialization (operate when EEPROM data chaos)
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4.3 Adjustment for AFT voltage and AGC voltage of IF channel in TV
4.3.1 IF AFC adjustment Disconnect J1(B face), input 38.9MHz PAL signal of 80dB to the pole of J1 near L11, Adjust L5
to value 1.25V of TP2. Enter factory menu, adjust TDA4470 from BG to LL, input 33.9MHz SECAM signal of 80dB, adjust R71 to value 1.25V of TP2 then solder J1.
4.3.2 IF AGC adjustment
Input 184.25MHz(PAL/BG) RF signal of 60dBuv to RF terminal, adjust R64 to value 4V of TP4 and there should be no obvious snowy picture. Increase the signal to 90dBuv and it should be display normally and no obvious noise.
4.4 White balance adjustment
4.4.1 white balance adjustment of HDMI
a. Input VG-849 signal from HDMI: TIMING854 (800* 600/60Hz) and eighth-level gray scale
signal of PAT920. Use color analyzer CA210 to adjust white balance.
b. Enter submenu of COLOR TEMP, Select 9300k of color temperature
c. Fixed value of B OFF, adjust R OFF and G OFF, let the color coordinate of the second level be (285, 293) and the brightness be about 3nit-6nit. Fixed value of B GAIN, adjust R GAIN and G GAIN, let the color coordinate of the seventh level be (285, 293). Adjustment R OFF, GOFF, R GAIN and G GAIN repeatedly until the value of the two levels gray-scale are (285, 293).
4.4.2 VGA/YPBPR/AV white balance check and correct
a. Input VG-848 signal of VGA to VGA terminal: TIMING854(800*600/60Hz) (PATIERN:CROSS) and auto adjust to full screen, then input PAT948 black/white signal, enter factory menu ADC ADJ, select AUTOTUNE and wait for OK display. Input PAT920(8 gray levels), check if the white balance is normal, if not, enter COLOR TEMP menu and set ALL COLOR to 0 and fine adjust according the method of 4.4.1c)
b. Connect VG-848 signal of YPBPR to YPBPR terminal and input TIMING972(1080i/60HZ) 100% color bar of PAT976(include black/white bars), Enter ADC ADJ submenu, select AUTOTUNE and wait for OK display. Input PAT920(8 gray levels), check if the white balance is normal, if not, set ALL COLOR to 0 and fine adjust according the method of 4.4.1c)
c. Input AV signal (PM5518, 8 gray levels, NTSC) to VIDEO1 terminal, check if the white balance is normal, if not, set ALL COLOR to 0 and fine adjust according the method of 4.4.1c)
Note: it can’t set back to 1 once ALL COLOR changes to 0.
5. Performance check
5.1 TV function Enter searching menu auto search, connect RF-TV terminal with central signal source and check if the picture is normal, if there are channels be skipped. Check TXT and parental control.
5.2 AV, YPbPr terminals Input AV/S, YPbPr/YCbCr HD signal, check if it is normal.
5.3 VGA terminal Insert VGA terminal, input VGA format signal of 640X480@60 Hz and check if the display is normal.
5.4 check sound channel Check the speaker of each channel.
5.5 other function check Check the turn on/turn off timer, asleep timer, picture/sound mode, OSD, freeze/mute, stereo, etc.
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5.6 presetting before ex-factory
Item Setting Item Setting Item Setting
PICTURE MODE STANDARD BALANCE 50 OSD LANGUAGE English
COLOR MODE NORMAL VOLUME 50 OSD HPOSITION 50
NR WEAK SLEEP TIMER OFF OSD VPOSITION 50
ZOOM FULL TTX LANGUAGE WEST OSD HALFTONE 50
SOUND MODE STANDARD BLUE SCREEN OFF OSD DURATION 15
AVC OFF WSS OFF
6. Software instruction
Table6 software instruction
No. Code No. Type Function Flash written
before paste
NS14 5270008001 ATMEGA8L Power image Yes
NS3 5272540001 PM25VF040 Main CPU program Yes
NB3 5272402002 24C02N-10SI27 HDMI EDID Yes
NB7 5272402002 24C02N-10SI27 VGA EDID Yes
NS5 5272404002 24C02N-10SI27 Store some important
information
No No written
Method
Written with
instrument like
ALL11
software
Method of software upgrading
1. The tools and software demanded
1) Please confirm that PC has the software of ISP_TOOL and install the parallel interface drive program Port95nt.
2) ISP_TOOL icon is bellow:
3) One parallel cable (25 pins) and one VGA cable (15 pins), the parallel cable connects the PC and the upgrade instrument, the VGA cable connects the TV and the upgrade instrument.
2. The steps for upgrading software
1) Please confirm that the connection wires and the upgrade instrument are connected well before the software written and then power on the TV.
2) Double click the icon ISP_TOOL to open it:
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3) Press “Connect“ to connect TV, if the connection is done successfully as shown below, then press “enter”.
Note: if it appears error, check the connection wires and check if ISP item of the factory menu is set to 1, if not, please set it to 1.
4) After connection is done, it needs to read the Binary document. Press “Read” as shown below:
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5) Search the document needed to write in the “Read” check box.
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Select
6) Select the document then the window will appear as shown below:
7) Press “Auto” to select the writing function.
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Select the items shown in the picture above: (a) Read File (b) Program (c) Exit ISP (d) Erase Device (e) File Area
8) Press “Run” to begin the writing program, wait till the blue bar is complete.
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After writing, it will display OK:
If there is error appeared (shown as below), press “Run” again to rewrite the program till it is success.
Note1: keep the connection well and don’t cut off the power during the writing process. Note2: the writing speed can be adjusted as shown below. Select “Config” then adjust Speed BAR,
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the value is bigger the speed is faster. But it is easier to appear error when increase the speed, so it need to select a suitable speed according the PC.
Step 1
Step 2
Working principle analysis of the unit
The RF signal received by antenna will be sent to tuner TUNER101, then IF signal will be obtained through high amplifier and mixed frequency, through pre-intermediate amplified by V15, then it will be sent to acoustic surface-wave Z17 to do IF filter and get better IF characteristics, then it will be sent to N3 (TDA4470) to do intermediate amplification, phase-locked loop VCO and synchronous wave detection to get video signal TV-V; after pre-intermediate amplification IF will also be sent to acoustic surface-wave Z16 to do filter at the same time, then it will be sent to TDA4470 to do intermediate amplification and output the second sound intermediate frequency signal (TV-SIF).
The TV-V signal output from TDA4470 together with TV-SIF will be sent to main IC NS2(MST9E19B).
Video signals of VGA and HDMI will be sent to MST9E19B, too.
Video signal of YPbPr and Video RGB of SCART1 via video switch NB24(PI5V330) will be sent to MST9E19B.
Video signal V (CVBS) of SCART1, YPbPr L/R and SCART1 L/R will be sent to MST9E19B.
The main IC NS2(MST9E19B) is a high performance and fully integrated IC, which can realize HDMI processing, video demodulating, video switch selection, A/D and D/A conversion, interlace/de-interlace processing, modes conversion, OSD and low-voltage differential output, etc. And it also has functions of audio selection, processing and MCU.
The video signal via MST9E19B processing, output 4 pairs differential signal and 1 pair clock signal for PDP panel display. TV-V output from TDA4470 via double video amplifying, it will be sent to SCART1 for AV-OUT.
Audio signal via MST9E19B processing will be sent to sound amplifier NV4 (R2S15102NP) amplifying to speaker. TV-SIF via MST9E19B demodulating and sound processing then output to NV3(LM358D) amplifying, the signal will be sent to SCART1 as AV-OUT.
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Block diagram
VGA
YPbPr
SCART1-RGB
SCART1-V SCART1-L/R HDMI L/R-VGA L/R-YPbPr L/R TUNER
HDTV SW. PI5V330
PRE AMP
SAW
TV-SIF
TV-V
SCART1-V OUT TV-L/R SCART1-L/R OUT
IF AMP TDA4470
EDID 24C02
2*AMP
POWER MEG. ATME G8 L
LCD TV CONTROLLER
MST9E19B
FLASH
EEPROM
PANEL
AUDIO AMP . R2S15102NP
SPEAKER
PRE AMP LM358D
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IC block diagram
1. MST9E19A
The MST9E19A is a high performance and fully integrated IC for multi-function LDC monitor/TV with resolutions up to SXGA (1280X1024)/WXGA+(1440X900). It is configured with an integrated triple-ADC/PLL, an integrated DVI/HDCP/HDMI receiver, a multi-standard TV video and audio decoder, a video de-interlacer, a scaling engine, the MStarACE-3 color engine, an on-screen display controller, an 8-bit MCU, and a built-in output panel interface. To further reduce system costs, the MST9E19A also integrates intelligent power management control capability for green-mode requirements and spread-spectrum support for EMI management.
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2. R2S15102NP
15
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3. TDA4470
The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF(VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processed all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.
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Wiring diagram
patch plug
patch plug
signal board
power board
patch plug
patch plug
patch plug
patch plug
patch plug
patch plug
patch plug
main board
brown
blue
power switch
brown
blue
weld
weld
weld
fix the screws on the metal frame of the panel
ground (yellow and green wire)
weld
patch plug
three-pin power plug
IR board
patch plug
key board
speaker socket
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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
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signal types.
Picture too bright and there is
distortion in the brightest area
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.
Picture is whitish or too bright in the
darkest area of the picture
Check if the setting for the brightness is too high
Possibly the brightness grade of DVD player (broadcaster)
is set too high.
No picture or signal produced from
the displayer if “XXX in search”
appears.
There appears an indication -
“outside the receivable scope)
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.
Remote control cannot work
properly
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.
No picture and sound, but only
hash.
Check if the antenna cable is correctly connected, or if it
has received the video signal correctly.
Blur picture Check if the antenna cable is correctly connected.
Of if it has received the right video signal.
No sound Check if the “mute” audio frequency setting is selected.
Check if the sound volume is set to minimum.
Make sure the earphone is not connected.
Check if the cable connection is loose.
When playing VHS picture search
tape, there are lines at the top or
bottom of the picture.
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
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2. Troubleshooting guide
k
f
p
d
d
p
2.1. No raster
Turn-on power supply, chec
if the red indicator is light in
the STANDBY?
no
Check if PIN9(5V) of XS15
on main board is normal?
no
Check STANDBY circuit o
ower supply board
yes
Press POWER button in the
unit or sensor control an
check the indicator.
blue
Check the power board an
anel drive
no
Check NS14 and its
peripheral circuit
red
Check if the PIN1, 2of XS15
on main board is low-level?
yes
Check the power
supply board
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2.2. Raster, but no picture
y
p
d
f
V
t
f
n
p
p
N
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
Check TUNER101
and its periphery
Does display OSD
menu in screen when
ress menu button?
yes
again
yes
no
yes
yes
Check if 1VPP signal
and noise wave o
TP1 on the T
board?
Check if all channels
have no signal?
Which is no signal
of channels
TV
no
Check if outpu
IF signal o
TUNER101 (pi
11) is normal?
yes
Check N3 and its
eriphery
YPRPB/SCART(RGB)
no
VGA/SCART(CVBS)/HDMI
Replace
main board
Check if NB24
output signal?
yes
Replace
main board
no
Replace
B24
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2.3.no sound
d
N
p
p
p
Check if PIN2, 9,10 an
14 voltage of NV4 is
normal?
Check power supply
no
yes
Check the wave of
PIN5,11 of NV4
no
Check PIN24 wave of
3
no
Check PIN11 wave of
TUNER101
no
Check TUNER101 and
its periphery
yes
yes
yes
Check NV4 and its
eriphery
Check NS2 and its
eriphery
Check N3 and its
eriphery
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APPENDIX-A: Main assembly 9432HU3522
NAME NO.
Main board IR board
Key board Remote control Panel
6HU06801G0
6HU0660910 6HU0660510 6010Y03507 5205321202
MAIN COMPONENT AND IT'S NO.
N3 NV4 NS2
RC-Y35-0F PDP32F1X031
TDA4470M (5274470001) R2S15102 (5271510201) MST9E19B (5270919002)
APPENDIX-B: Exploded view (PS-32X35)
PART LIST OF EXPLODED VIEW
NO. EDSCRIPTION
1 front cabinet 2 fiter glass 3 panel 4 push board 5 main frame 6 push board 7 main board 8 socket
9 wall mounting bracket 10 back cabinet 11 speaker connection 12 right speaker 13 stand 14 speaker back cover 15 back baffle 16 left speaker 17 connection bracket 18 push board 19 power socket 20 push board 21 decorative bar 22 key board 23 IR board 24 power switch
Note: design and specifications are subject to change without notice.
9432HU3522 Ver.1.0
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