Xoceco PS-42K9D Schematic

PS-42K9D

(PS-42K9)

CONTENTS

Safety instructions………………………………………………………………………..… Adjustment instruction …………………………….…….…………………………….… Method of software upgrading ………………………………………….…….…………… Working principle analysis………….……………………………….………….…………. Block diagram…………………………………..………………………..…….………… IC block diagram………………………………………………………………………..…… Wiring diagram ……………………………………………………………..……………... Main assembly……………………………………………………………………………..… Trouble shooting ……………………………………………………….…………………… Troubleshooting charts………………………………………………………………..…… Printed circuit boards ………………………………………………………………...………. Schematic diagram …………………………………………………………………….…..

APPENDIX: EXPLODED VIEW

1 4 7 8 9 11 19 20 21 23 33 37

PART LIST

Attention: This service manual is only for service personnel to take reference with. Before

servicing please read the following points carefully.

Safety Instructions

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 (bath room, 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

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 removi ng the screen, because once they are damaged the screen will fail to work and it’s not possible to repair it.

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 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.

2. “Criterion for Identifying the Defects on Screen”

The PDP produced by our Company at present uses the following criterion for identifying the

defective points:

There may appear three kinds of defective points for this model as shown in Fig.1 --bright spot (remain bright); dark spot (non-illuminating); flickering spot (remain flickering). However they should not exceed the specification as in table 1. Otherwise the product shall be deemed as sub-standard.

Figure 1 Defective Points

Table 1 Criterion for Three Kinds of Defective Points

Zone B

Item Kind Area A Area B Remark

1 Dark spots No more than 4 No more than 10

2 Bright spot No more than 1 No more than 3 3 Flickering spots No more than 1 No more than 3

Zone A

H/4

H/2

H/4

W/4 W/2W/4

Total number of defective points in A and B shall not exceed 14. The distance between two defective points shall not be

shorter than 10mm.

Alignment instruction

1. Alignment equipment PM5518 (video signal generator) K-7253 (VGA signal generator) CA210 (white balancer)

2. Alignment flow-chart The alignment flow-chart is shown as fig-1

To produce CPU board and AV and TV board

Check AV board and TV board

Connect with central signal source, then check each function of TV such as analog control etc., check the output of headphone and speaker

Input AV/S and HD signal, then check each function of all the terminals

Input VGA signal (one format), check if the displ ay is normal under PC condition, check each function such as analog control etc., ch eck hori zont al /vertical center etc.

Check the accessories and pack t hem in box

Fig-1 adjustment flow-chart

3. AV/TV board adjustments

Adjust the potentiometer VR9002 of power supply board, testing TP1(12VAMP) point is 15V ±0.05V.

4. CPU board adjustments

Connect CPU board, button board and AV/TV board, connect with power and observe the display. Method for entering factory menu: press “VOL+”, “MUTE” and “VIDEO” repeatedly to enter factory menu; press “ENTER” to select different items when the first line of each adjustment item just lights up; input VGA and DVI signal, then select the “mode” item; after that, you can press “enter” to select three kinds of color temperature namely 6500K, 9300K and 12000K press “MENU” to exit.

Check DDC and FLASH

Check the CPU board

All testing

4.1 EEPROM initialization

Enter the first page of factory menu, select “clear eeprom” and then press “enter”, shut down the unit after “ok” appears.

4.2 VGA channel adjustment

4.2.1 Preset VGA channel mode

Input VGA signal (PATTERN 5: Final Test) of K-7253, select TIME301 (640*350/70Hz), press “AUTO” to do the auto adjustment until the screen is filled with picture. Use the same method to do auto adjustment for the following items:

TIME302 (720*400/70Hz) TIME303 (640*480/60Hz) TIME311 (800*600/60Hz) TIME313 (1024*768/60Hz) TIME315 (640*480/75Hz) TIME316 (800*600/75Hz)

TIME317 (1024*768/75Hz) TIME319 (1280*1024/75Hz) TIME339 (1280*1024/60Hz)

4.2.2 ADC adjustment of VGA channel

Input K-7253 64 level gray-scale signal of TIME303 and PATTERN474, adjust adc-gain to maxinum and let the brightest two levels be recognized.

4.2.3 White balance adjustment VGA/DVI channel

Input K-7253 8 level gray-scale signal of TIME303(640 x 480/60Hz) and PATTERN471, enter white balance adjustment menu; adjust the third and seventh levels using white balance. Select 6500k of “mode”, adjustment offset_R, offset_G and offset_B, let the color coordinate of the second level be 308 and 316 and its brightness be4.5-5nit more or less. Adjust gain_R, gain_G and gain_B, let the color coordinate of seventh level be 308 and 316. Adjustment offset_R, offset_G, offset_B, gain_R, gain_G and gain_B repeatedly until the value of the two levels gray-scale be 308 and 316. Select 9300k of “mode”, adjustment offset_R, offset_G and offset_B, let the color coordinate of the third level be 285 and 293 and its brightness be 4.5-5nit more or less. Adjust gain_R, gain_G and gain_B, let the color coordinate of seventh level be 285 and 293. Adjustment offset_R, offset_G, offset_B, gain_R, gain_G and gain_B repeatedly until the value of the two levels gray-scale be 285 and 290. Select 12000k of “mode”, adjustment offset_R, offset_G and offset_B, let the color coordinate of the second level be 270 and 283 and its brightness be 4.5-5nit more or less. Adjust gain_R, gain_G and gain_B, let the color coordinate of seventh level be 270 and 283. Adjustment offset_R, offset_G, offset_B, gain_R, gain_G and gain_B repeatedly until the value of the two levels gray-scale be 270 and 283.

Note: gain_R, gain_G, gain_B should not value above 128 and let one of them be 128 at

least.

4.3 Adjustment AV/TV channel

4.3.1 Adjustment VCO, OPTION, sub-brightness and sub-contrast

Input AV color bar signal (PM5518 COLOR BAR 100%) to VIDEO terminal, enter the first page of factory menu, press “enter” after selecting “auto color”, display “OK” after 2 seconds; then you can finish the VCO adjustment; set the value of “option” to 11 and “s-bright” to 150 as well as S-contrast to 140. Set the Max Volume to 17 when the AVC is OFF and SRS is OFF. Set the page number of VPC3220 to 0, 0, 3, 3, 3, 3, 9.

4.3.2 white balance adjustment of AVTV channel

Input AV signal (PM5518, 8 level gray-scale signal), enter adjustment menu of white balance, and

adjust the second level and seventh level using white balance. Adjust offset_R, offset_G and offset_B to let color coordinate of the second level be 285 and 290 and its brightness be about

2.3nit. Fixate gain_B to 128, adjust gain_R, gain_G to let color coordinate of the seventh level be

285 and 290. Adjust offset_R, offset_G, offset_B, gain_R and gain_G, repeatedly using the same method until the value of the two levels gray-scale be the specified value.

4.4 white balance adjustment YPbPr channel

Input YPbPr signal of K-7253 to YPbPr terminal, input TIME380 (480i) PATTERN471 8 level gray-scale signal, Enter adjustment menu of white balance, adjust the second level using white balancer. Adjust offset_R, offset_G and offset_B, to let color coordinate of the second level be 285 and 290 and its brightness be about 2.3nit. Input 8 level gray-scale signal of TIME392 (480p), TIME394 (720p) and TIME396 (1080i) separately, repeat the above operations to let color coordinate of the second level be 285 and 290 and its brightness be about 2.3nit.

5 Performance check

5.1 TV function

Enter searching menu → auto search, connect RF-TV terminal with central signal source and check if there are channels be skipped

5.2 AV/S, YPbPr terminals

Input AV/S, HD signal, check if it is normal.

5.3 VGA terminal

Insert VGA terminal, input VGA format signal of 640 X 480@60 Hz, check if the display is normal. If interference exists, press the auto adjusts button on remote control again and check if it is normal.

5.4 check sound channel

Check the speaker and headphone of each channel.

5.5 presetting before ex-factory

Item Setting Item Setting Item Setting

Picture mode NATURE OSD language English BALANCE 50

Sound mode NEWS VGA color

N/R WEAK SPEAKER ON CCD OFF

SCREEN 16:9 HEAD PHONE ON Turn off TV

9300 SRS OFF

temperature

Method of software upgrading

Steps of software upgrading are as follows:

1. Select a serial connection wire and a VGA connection wire and then connect them by means of a

patch panel;

2. Use a serial wire to connect the PC to the patch panel and set TV set to off state;

Open the software upgrade file holder and double click

FlashUpgraderNT (use under window 2000/XP/NT)

FlashUpgrader (use under window 98),

The following interfaces will show up after running the program:

Based on the computer features, set up the serial port (COM Port). Select corresponding serial port (if it’s unable to FLASH WRITE, change to another port). Baud is selected to be 115200. Then select Reset Target After Download. Click FLASH pushbutton, it’s ready to run. For other settings, please refer to the Fig. Above (already defaulted by the system, normally no need to change). Switch on TV set the FLASH write program begins to run;

After FLASH write is over, push button “cancel” will become flash. Then shut the main power supply

and its OK just switch it on again.

Note: Do not shut the power off or turn the TV set on during the FLASH write. Otherwise it may lead to no way for flash to rewrite.

Working principle analysis

RF signal produces composite color television signal (TV-V) and second intermediate frequency SIF through TUNA01. The signal together with AV/SVHS (SVHS priority) and VIDEO etc. are sent to U29 VPC3230. After the above three video signals being selected, one is output as AV OUT; one is sent to CCD decoder Z86229 (NA09) to get RGB and FB signals, then send them back to U29; the last one is sent to do color decoding and then is sent to FLI2310 (U13) with the format of 8 bit

ITU-R656 to do line-by-line process.

YPRPB signal is firstly sent to U30 MST9883 to do the A/D conversion. After this, the signal will be converted into YUV signal of 24BIT, send it to FLI2310 also. After a series of procedure such as matrix, chrominance and tint etc. in FL12310, the above two ways signal will be converted into RGB of 24bit, then send it to the main processing chip U12 JAG-ASM. There are another two signals sent to U12 also: RGB signal of computer VGA, RGB signal of 24BIT produced by DV1 through U15 TFP403/501. The three ways of signal will be selected and do the picture format process in U12, including items of OSD, GAMMA correction, brightness and contrast etc., and then they will be converted into 1024*768 format in the form of 24BIT RGB signal. Send it to LVDS converter U31 DS90C383, then it will be converted into 4 low-voltage difference signals which can be accepted by PDP panel, then send it to PDP panel to do the picture display. Send left and right channel audio R/L of VGA/DVI to MSP3420 (NA04) after selection by HEF4052 (NA03); send AV, SVHS and R/L of YPBPR to NA04; send SIF of tuner to NA04 also. SIF of the second sound IF will be demodulated as audio signal in NA04, the signal together with other 4 ways of audio signals will do the conversion selection, finally volume control and sound effect processing will be done. Output left-right sound channel signal R/L. one will be sent to SRS sound field processor NA06 M62494 to do SRS processing and finally amplified by NA07 and NA08 TPA3001 to drive the speaker. The power panel attached to PDP panel can supply with power, and it can be switched to all kinds of power needed.

BLOCK DIAGRAM

VGA

DVI

Y/AV2

AV1

AV-V OUT

YPrPb

TUNA01

SIF

VPC3230

R G B FB

NA09

CCD

Z86229

U30

ADC

MST9883

RECEIVER

TFP501

TV-v

VIDEO DECODER

ITU-R656

U29

RGB

U15 DVI

24bit YUV

8bit

U13

DEINTER

LACER

FLI2310

U14

SDRAM

I C BUS

EEPROM

RGB 24bit

U12

SCALER

JAG-ASM

U19

SDRAM

U20

SDRAM

MICRO-CONTRLER

TSC80251G2D

RGB 24bit

U31

LVDS

DRIVER

DS90C385MTD

KEY BOARD

FLASHMEMORY

PANEL

SIF

VGA

DVI

YPrPb

AV1

S/AV2

AV-MONO OUT

HEF4052

NA03

MONO

NA04

AUDIO

PROCESSOR

MSP3420

R/L

NA06

SRS 3D STEREO

CONTROLLER

M62494

R/L

NA07

NA08

AUDIO

AMPLIFIER

TAP3001

R/L

SPEAKER

IC block diagram

1.AD9883

Pins description: 54,48,43 PIN: Input of YPRPB 2-9 PIN: Output of Y 12-19 PIN: Output of U 70-77 PIN: Output of V 56,57 PIN: SCL, SDA applied for control the operation of IC 66 PIN: Output of horizontal synchronizing 64 PIN: Output of field synchronizing 65 PIN: Output of DE 67 PIN: Output of CLK 11,26,34 PIN: 3.3V power supply

2.VPC3230

Pins description:

70 PIN: Video of AV OUT 71 PIN: Input C 72 PIN: Input Video of Y or AV2. 73 PIN: Input Video of AV1. 74 PIN: Input Video of TV 31-34, 37-40 PIN: Output format signal of. ITU-R656 27 PIN: Output of CLK 13,14 PIN: SCL, SDA applied for control the operation of IC 10,29,45,52 PIN: 3,3V_VPC power supply. 59,69,76 PIN: 5V power supply.

3.FLI2310-Simplified Internal Block Diagram

Pins description:

196,199-205 PIN: Input of format signal of ITU-R656 11-15,18-20 PIN: Input of U 21-28 PIN: Input of V 29,32-35,38-40 PIN: Input of Y 1 PIN: Input of YPRPB horizontal synchronizing 2 PIN: Input of YPRPB field synchronizing 4 PIN: Input of YPRPB-CLK 5 PIN: Input of YPRPB-DE 195 PIN: Input of AV/TV-CLK 114 PIN: Input of SDRAM-CLK 136,137,140-145 PIN: Output of R 148-155 PIN: Output of G 126,127,130-135 PIN: Output of B 125 PIN: Output of CLK 111 PIN: Output of SDRAM-CLK 118 PIN: Output of horizontal synchronizing 119 PIN: Output of field synchronizing 120 PIN: Output of enable 45,46 PIN: SCL, SDA applied for control the operation of IC 8,62,112,193,171,187 PIN: 3.3V power supply 155,168,16,68,123,197 PIN: 1.8V power supply

4.JAG-ASM

Pins description:

A12, A13: Input of VGA-R A16, A17: Input of VGA-G A20, A21: Input of VGA-B P1, P2, N2, N3, M1-M4: Input of DVI-B

L1-L4, K2-K4, J1: Input of DVI-R J2-J4, H1-H3, G1, G2: Input of DVI-G

AA2, AA3, Y1-Y3, N1-N3: Input of AV/TV/YPRPB-B N4, V1-V4, U1-U3: Input of AV/TV/YPRPB-G U4, T1-T4, R1-R3: Input of AV/TV/YPRPB-R AB3: Input of DVI horizontal synchronizing AB1: Input of DVI field synchronizing G4: Input of DVI-CLK F1: Input of DVI-DE D6: Input of VGA horizontal synchronizing P3: Input of VGA field synchronizing F2: Input of AV/TV/YPRPB horizontal synchronizing G3: Input of AV/TV/YPRPB field synchronizing P4, AA4, AF12: Input of A V/TV/YPRPB-CLK G6: Input of AV/TV/YPRPB-DE AD13-15, AE13-15, AF14, and AC15: Output of R AF15, AC16, AD16, AE16, AD17, AE17, AF17, AC18: Output of G AD18, AE18, AF18, AC19, AD19, AE19, AD20, AE20: Output of B AE21: Output of horizontal synchronizing AC21: Output of field synchronizing AC13: Output of CLK AF20: Output of EN AD21: Output of EN VDD(power switch) AF22: Output of EN BKL(back light switch) B1: Output of PWW(back light adjustment) F3, F4: SCL, SDA applied for control the operation of IC B22,C22,D20,C21;H4;D21;AC8: 2.5V D7;A5;A26;AF10: 3.3V C10,D10-D19: JA2.5V1 C8,D8,D9: JA2.5V2

5. TFP501

functional block diagram

3.3 V

Internal 50-

Termination



3.3 V

1.8 V

Regulator

3.3 V

Rx2+

Rx2-

Rx1+

Rx1-

Rx0+

Rx0-

RxC+

RxC-

RED(0-7)

CTL3 CTL2

GRN(0-7)

CTL1

BLUE(0-7)

VSYNC HSYNC

Panel

Interface

Latch

PLL

Channel 2

Channel 1

Channel 0

Data Re co ver y

and

Synchronization

+ _

CH2(0-9)

CH1(0-9)

CH0(0-9)

TMDS

Decoder

QE(0-23) QO(0-23 )

ODCK DE SCDT

CTL2 CTL1 VSYNC HSYNC

Terminal Functions

TERMINAL

NAME NO.

AGND 79 GND A nalog ground? Ground reference and current return for analog circuitry AV

82,85,88,91V

CAP 67 V

CTL[2:1] 41,40 DO General-purpose control signals? Used for user defined control. In normal mode CTL1 is not powered down

DE 46 DO Out put data enable? Used to indicate time of active video display versus nonactive display or bl ank time.

DFO 1 DI Ou tput cl ock data forma t? Contro ls the o utput c lock ( ODCK) f ormat for eith er TFT o r DSTN panel su pport . For

DGND 5,39,68 GND Digital ground? Ground reference a nd current return for digital core DV

6,38 V HSYNC 48 DO Hor i z ontal sync output OCK_INV 100 DI ODCK polarity? Selects ODCK edge on which pixel data (QE[23:0] an d QO[23:0]) and control signals

I/O DESCRIPTION

I/O

Analog VDD? Power supply for analog circuitry. Nominally 3.3 V

Bypa ss c apa ci t or? 4.7F tantalum and 0.01 F ceramic conn ected to gro und. This ca paci tor is o ptiona l for

the TFP403, but is required for the TFP501.

via PDO

DESCRIPTION

During blank, on ly HSYNC, VSYNC, and CTL1-2 are tr ansmitted. During tim es of active display , or nonbla nk, only pixel data, QE[23:0] and QO[23:0], is transmitted.

High : Active display time Low: Blank time

TFT support ODCK clock runs cont inuously . For DST N support OD CK only clock s when DE is high; ot herwise ODCK is held low when DE is low .

High : DSTN support/ODCK held low when DE = low Low: TFT support/ODCK runs continuously.

Digital VDD? Power supply for digital core. Nominally 3.3 V

(HSYNC, VSYNC, DE, CTL1-2 ) are latched Normal mode:

High : Latches output data on rising ODCK edge Low : Latches output data on falling ODCK edge

80,81,83,84,86,87,89,90: Input of four DVI different signal 92: DDC-SCL 93: DDC-SDA 95: PROM-SCL 96: PROM-SDA 2: Input of POWER DOWN

9: Input of OUTPUT DRIVE POWER DOWN 8: Output of synchronization check 10-17: Output of B 20-27: Output of G 30-37: Output of R 44: Output of CLK 46: Output of data enabling 47: Output of field synchronizing 48: Output of horizontal synchronizing 6,38,82,91,18,29,57,78,97: 3.3V power supply

6. DS90C385

51,52,54-56,3,50,2: Input of R 4,6,7,11,12,14,8,10: Input of G 15,19,20,22-24,16,18: Input of B 27: Input of horizontal synchronizing 28: Input of field synchronizing 30: Input of data enabling 31: Input of CLK 32: Input of power enabling 37,38,41,42,45,46,47,48: Output of 4different signal 39, 40: Output of 1 CLK signal 1, 9, 26, 34, and 44: 3.3V power supply

7. MSP3420

47: Input of VGA/DVI-L 48: Input of VGA/DVI-R 50: Input of YPRPB -L 51: Input of YPRPB -R 53: Input of AV2/S -L 54: Input of AV2/S -R 56: Input of AV1-L 57: Input of AV1-R 67: Input of SIF 25: Input of earphone -L 24: Input of earphone -R 27: Output of R 28: Output of L 36: Output of AV-R 37: Output of AV-L 2: SCL 3: SDA 11,12,13; 39; 65,66: +5V—MSP

8. Z86229

AddrB us

Row

6 4 15 14 1613

VDD

+5V

I2CSEL

SDO SDA SCK

Serial

SEN SMS

VIN/

Intro

Data Line

Sliced

Data CLK

Data

Buffer

Status Reg

Control Port

Data Bus

FEW

Recovery

Slicer

Lock

SIG

Processor

Command

TestReg

II Lock

Digital

Slicer

SYNC

MUX

Address

Row

Latch

Display

DOT CLK

DEC

ADDR

RAM

DIV

CHAR CLK

VLock

COMP SYNC

ADDR

Decoder

RED GREEN

POR

V/I

CKT

Ref

Line & Fld

BLUE BOX

17 3 2 18

Z86229 only

RREF

Decodes

Vss(A)

Loop

Filter

LPF

Logic

Character

Generator

Latch

Display

FLD

CIR

CHAR

MSGR

OSCO/S

Output

SS CTR

Field

Line &

Control

SLS

SFLD

FLD

Control

&MUX

IDrive

Dual

Clamp

Slice Level

Video

CSYNC

CG Lines

Logic

PH1

MSYNC

PH2

Figure 1. Z86229 Block Diagram

HIN

Wiring diagram

SPEAKER ASSY

POWER SUPPLY

FILTER BOARD

667-PSIK8U-40

AV PROCESSING BOARD

POWER SUPPLY BOARD

PANEL

CPU BOARD

LOGIC BOARD

667-PSIK8U-56

BUTTON BOARD

Main assembly

NAME NO. MAIN COMPONENT AND NO.

AV processing board 667-PSIK8U-40 NA04

NA06 NA07 NA08 NA09

CPU board 667-PSIK8U-56 U12

U13 U15 U29 U30 U31 U2 U4 U15

Keypad board 667-PS42K8-05 Power supply filter board 667-PS42D8-51 Panel (S42SD-YB03) 335-42003-00

MSP3420 (353-34200-10) M62494FP (353-62494-20)

TPA3001 (353-30010-10) Z86229 (353-86229-10)

JAG-ASM (353-0JAG0-00) FLI2310 (353-23100-00) TFP403PZP (353-04030-10) VPC3230D (353-32300-80) MST9883B (353-98830-10) DS90C385 (353-03830-70) TSC80251G2D (353-80251-10) AT49F002NT (352-49002-70) TFP501 (353-05010-00)

Trouble shooting

Before servicing please check to find the possible causes of the troubles according to the table below.

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

2.TV set:

Symptoms Possible cause Unable to switch the power on  Check to see if the power plug has been inserted

No picture and sound  Check to see if the power supply of TV has been

Deterioration of color phase or color tone Screen position or size is not proper  Check is the screen position and size is correctly set

Picture is twisted and deformed  Check to see if the picture-frame ratio is properly set

Picture color changed or colorless  Check the “Component” or “ RG B” set t ings of the TV

 Possibly due to interference from automobile, train, hig h

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.

properly into the socket.

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

source and TV set is correct.

 Check if all the picture setups have been corrected.

up.

set and make proper adjustment accor ding to the

signal types. Picture too bright and there is distortion in the brightest ar ea

 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 signal in a certain position of the system. Picture is whitish or too bright in the darkest area of the pictur e

 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.

 Check if the cable is disconnected.  Check if it’s connected to the proper terminal or if the

input mode is correct. There appears an indication - “outside the receivable scope)

 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 pictur e sear ch 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 cr ystal 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

Troubleshooting charts

1.No raster, no picture and no sound:

Check if power indication is light? yes no

normal

Short circuit the pin 8 (PS-ON) of P2 to the ground, then check the supply power.

U24 abnormal

Normal abnormal

Note: Power supply for PDP i s pr ovided with over current and over voltage protection functions. If there is over current or over voltage, this protection will function and no output.

Short circuit in a power line

Check the supply

power D3.3V

abnormal

abnormal normal

Pull out P2 check power

Power board problem

No raster, no picture and no sound

Check U2 an U4

Check 5V-STBY

Pull out P2 check 5V-STB

Short circuit U24 and other circui of side.

abnormal normal

Power board problem

2.With sound but no picture:

yes no

no yes

Check if the white

alance of the factory

menu is normal?

normal

abnormal

Check all signal for

Normal abnormal

this circuit

Normal abnormal

Note:

Setting for the self check of the screen:

 For 42”HD screen (S42AX-XB01):Push down 2 and 4, push up 3 of SW2001on the logic board;  For 50”HD screen (S50HW-XD02):Push down 1 and 4, push up 2, 3, 5, 6 of SW2001on the logic

board; Please make sure resume it to the original status when the check is over.

Check if no image for all

other channels

check program

yes no

Reset the EEPROM

With sound but no picture

Display LOGO?

Check if the P4 is signal wave?

Check input signal of U31 and power supply

U31 damaged

Check U12 and the circuit of output part

Unfix P4 and P2, short circuit the PIN8 of the P2 to END, testing signal itseft of the logic board set the on, then check if display white of the panel.

Screen damaged

3.With picture but no sound.

With picture but no soun

If there is output from XA01of sound power amplification board No

Yes

Check if input signal in pin 2 of sound

power amplification

Sound box damaged

yes no

Sound power amp. or other peripheral circuit have problem. Check power supply, if SHUTDOWN pin control is normal and if output short circuited or othe problems that cause protection to work.

Measure if the sound input of the present channel corresponding to

yes

MSP3440 or other peripheral

circuit have problem

Check different levels of circuit following input audio signal

4.A certain channel is abnormal

1) AV/YCRCB no picture

Check if pin 72(S-VIDEO), pin73(VIDEO), pin75/pin5(YCRCB) of U29 has signal input

yes no

Check if pin27, pin31-34, pin37-40 of U29 has loc signal output and ITU-R 656 is normal?

There is problem from A socket to U29 channel

U29 or other peripheral circuit have problem

Check PR3~PR9 resister to see if U13 out

ut is normal

U13 or other peripheral circui have problem

U12 or other peripheral circuit have

roblem

2) No picture in YPrPb

Check if pin48 and pin49 of U30 have input signal.

Check U30 and other peripheral circuit

Check PR36-RP41 and RP141 resiste to see the U30 output is normal?

Check D4 socket to U30 signal.

Check PR3-RP9 resister to see the U13 output is normal?

Check U13 and other peripheral circuit

Check U12 and other peripheral circuit

3) TV no picture

Check if pin27, pin31-34, pin37-40 of U29 has loc signal output and ITU-R 656 is normal?

Check U29 and othe peripheral circuit

Check if PIN74 of U29 have input signal?

es no

Check PR3~PR9 resiste to see if U13 output is normal?

Check U13 and other peripheral circuit

esno

Check U12 and other peripheral

Check power supply of TUNA01 and other peripheral circuit

)

yesy

4) VGA No Picture

Check U12 and other

Check the input H/V synch. signal of pin8 and pin10 of U17

es no

Check the input

peripheral circuit

check U17 and other peripheral circuit

H/V synch. signal of pin3 and pin5 of U17

check interface circuit

Display input signal?

If the mode of VGA (lower right corner of screen OSD

Check the input signal of PIN(A13, A17, A21) of U12

es no

check interface

circuit

Reset EEPROM

identifiable

Check white balance of factor

Check U12

5.Abnormal picture:

 Peculiar color, which may be caused by the following phenomena:  A certain differential wire pair of LVDS(RX0+/-, RX1+/-, RX2+/-, RX3+/-)of P4 is abnormal, which

may lead to lack of color ( it’s not a complete loss of color);  Failure with resistor rows RP28~RP33, w hi c h may lead to loss of correspond ing color from the gray degree corresponding to the picture of all channels and OSD.  Failure with resistor rows RP36~RP41, w hi c h may lead to loss of correspond ing color from the gray degree corresponding to the picture of channels D4.  Failure with resistor rows RP3~RP8, which may lead to loss of corresponding color from the gray degree corresponding to the picture of channel D4, TV, AV and Y CRCB.

 Abnormal picture vertically or horiz ont ally (bar l ike): Abnormal in complete line extend ing a ll t he way from up downward on the screen of stand definition TV set; abnormal vertically on half screen of high definition TV set. They may be caused by the damage of the address BUFFER module that directly corresponds to its position, or may be caused by the damage of the connection wire that directly corresponds to the position of the screen. The horizontal bar like abnormality is also related to the Y driving circuit that corr esponds directly to its p osition . To judge these phenomena, It’s poss ible to chec k it by setting the screen to the status of self check as explained above

 No brightness in the square block area: Normally it’s caused by the damage of the address

+ 79 hidden pages

Xoceco PS-42K9D Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual