Insignia NS-LCD32 Service Manual Download Page 21 | Manualshive

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Wiring diagram

782.22HA37-0500

782.26HA37-

690A

782.L20S21-0900

782.26HA37-2900

XB02

VIDEO-

O

U

T

XP3

KEY

XP2

IR

XB03

RS232

X41

LVDS

XP5

XP1

XV2

RF

NB9

SP/DIF

XA21

HDMI

-1

XA22

HDMI

-2

XB5

X1

VGA

X102

Y

P

B

P

R

-1

/2

XB01

VIDEO-

IN

XB7

S

X109

XB3

XB1

XB2

XV1

X509

X508

X505

X506

X501
220V

Backlight

power

Power

board

Logic

board

Household

Power

Speaker

T

uner

Main

board

Port

Port

Port

Port

Earphone

-T

erminal

Magnet

ring

Main

board

power

Amplifier

power

Backlight

power

Backlight

control

Backlight

control

Main

board

power

Amplifier

power

Amplifier

output

Interface board

Key board

IR board

AC power

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Summary of Contents for NS-LCD32

Page 1: ...LCD TELEVISION C u s t o m e r N S L C D 3 2 F a c t o r y L C 3 2 H A 3 7 ...

Page 2: ...g Working principle analysis of the unit Block diagram IC block diagram Wiring diagram Identification criteria for the bright spot and dark spot of the LCD screen Troubleshooting guide Schematic diagram APPENDIX A Assembly list APPENDIX B Exploded View 1 3 8 10 11 12 19 20 21 26 ...

Page 3: ... will result 2 5 If any foreign substance such as water liquid metal slices or other matters happens to fall into the module be sure to cut the power off immediately and do not move anything on the module lest it should cause fire or electric shock due to contact with the high voltage or short circuit 2 6 Should there be smoke abnormal smell or sound from the module please shut the power off at on...

Page 4: ...0 85 Scope for storage 10 90 2 13 Display of a fixed picture for a long time may result in appearance of picture residue on the screen as commonly called ghost shadow The extent of the residual picture varies with the maker of LCD screen This phenomenon doesn t represent failure This ghost shadow may remain in the picture for a period of time several minutes But when operating it please avoid disp...

Page 5: ... and CH to select adjustment page then press OK to access Press CH and CH to move cursor up and down when the cursor stays on a certain adjustment item press Check DDC and FLASH To produce signal board on the line All testing Auto correction Connect with central signal source then check each function of TV such as station missing analog control etc check the output of headphone and speaker Input A...

Page 6: ...al to the central signal source enter the setup menuĺ auto search check if there is station skipping the output of earphone and speaker the picture are normal The signal should include NTSC and ATSC 4 2 AV S VIDEO terminal Input AV S signal check if the picture and sound are normal 4 3 YPbPr YCbCr terminal Input YUV signal VG 849 signal generator separate input YUV format signal of table 1 and che...

Page 7: ...lor Temperature Cool 3D Y C On 4 Audio menu Sound Mode News Balance 31 Earphone Vo1 31 Digital Audio Output AC 3 MTS Mono 5 Setup menu Tuning Band Air 6 Feature menu Sleep Timer Off Menu Language English Note Except for Color Temperature of Cool the Advanced Video Menu of YPBPR YCBCR and VGA channels sets according to the adjustment of factory Trouble shooting Before servicing please check to find...

Page 8: ...al TV set is correct Deterioration of color phase or color tone z Check if all the picture setups have been corrected Screen position or size is not proper z Check is the screen position and size is correctly set up Picture is twisted and deformed z Check to see if the picture frame ratio is properly set up Picture color changed or colorless z Check the Component or RGB settings of the liquid crys...

Page 9: ...f it has received the video signal correctly Blur picture z Check if the antenna cable is correctly connected z Of if it has received the right video signal No sound z Check if the mute audio frequency setting is selected z Check if the sound volume is set to minimum z Make sure the earphone is not connected z Check if the cable connection is loose When playing VHS picture search tape there are li...

Page 10: ...65 D0002 645 2 Open iDev exe 3 Click enter the setting interface Set Serial Port to the current COM port set the Baud Rate to 1152000 Image Path to the path of the new software If the new software renews Bootcode pitch on Update boot sector option and then click OK 4 Click to enter the interface below ...

Page 11: ...e software begins to be written 6 After the software written Press the power key local keypad and holding for several second to force power off TV set 7 Turn on the TV again and enter the factory menu initialization setting ...

Page 12: ...information source decoding in the format of standard serial TS stream HD video signal via decoding to A D conversion and OSD superposition at last send to LVDS drive level for LCD panel HD audio signal via decoder built in ZR39760 resumed to multi channel sound of Dolby AC 3 at the same time output data stream of I2S format and S PDIF data stream Audio data of I2S format is fed to audio D A conve...

Page 13: ...02 AV1 AV2 YPBPR2 RS232 AV Audio Out S Video PLC915 IR KEY AV Out MAX3232C CAT99 83 ATSC DIF ATSC DIF NTSC CVBS Y C I2C I2C LVDS M52797SP CS5340 CS4345 R2S15903 I2S I2S HDMI1 FSHDMI04 PI5V330 P15V 330 YPbPr Audio2 YPbPr Audio1 CD4052 PC AUDIO earphone socket with switch PANEL Block diagram 11 ...

Page 14: ...12 IC block diagram 1 ZR39760 ...

Page 15: ...s Pixel Clock Synthesizer The triple ADC support 12 110 MHz Sampling Rate It integrated 5 bit pixel clock phase adjustment for precise sample timing control Its Output support 4 2 2 Format Mode and it can Pin Compatible with AD9883A Block diagram of MST9883 is flow ...

Page 16: ...14 ...

Page 17: ...8 External Clamp Input 30 Horizontal SYNC Input 31 Vertical SYNC Input 29 Hold PLL Frequency do not track HSYNC 56 Serial Interface clock 57 Serial Interface data pin 55 Serial interface address pin 70 77 Red output data 2 9 Green output data 12 19 Blue output data 67 Output data clock 66 HSYNC output 64 VSYNC output 39 42 45 46 51 52 59 62 Analog Power ...

Page 18: ...25 28 32 36 40 41 44 47 50 53 60 61 63 68 80 Ground 3 R2S15903SP R2S15903SP is an audio signal processor It has MUTE and Volume Tone control It can support 5 input selector Pin descriptions of R2S15903SP 5 28 AV OUT INPUT L R 2 31 other channels 17 18 I2C SDA SCL 32 Power Supply ...

Page 19: ...plifier The output power can reach 20W 10 THD N with 8 ȍ speakers 18V power supply eliminating the need for heat sinks Pin description 1 audio out left audio output 15 audio out right audio output 11 audio in left audio input 5 audio in right audio input 14 mute1 ...

Page 20: ...witch with I2C bus control Pin description 1 VCC 9V 17 VIDEO OUT 2 4 AV2 L R IN 19 21 L R OUT 2 AV2 VIDEO IN 20 AV CVBS OUT 6 TV CVBS IN 23 TUNER_IN 5 7 Y Pr Pb1 L R IN 22 24 TV L R IN 8 10 Y Pr Pb2 L R IN 11 12 SCL SDA ...

Page 21: ...02 Y P B P R 1 2 XB01 VIDEO IN XB7 S X109 XB3 XB1 XB2 XV1 X509 X508 X505 X506 X501 220V Backlight power Power board Logic board Household Power Speaker Tuner Main board Port Port Port Port Earphone Terminal Magnet ring Main board power Amplifier power Backlight power Backlight control Backlight control Main board power Amplifier power Amplifier output Interface board Key board IR board AC power ...

Page 22: ...m 10mm 5mm Total defected point 8 7 5 4 Notes 1 Definition of defected point bright spot dark spot It is identified as a defected point if its area exceeds 1 2 of a single picture element R G B 2 Definition of bright spot It is identified as a bright spot if it is bright in the state of dark field and its bright size remains unchanged 3 Definition of dark spot It is identified as a dark spot if it...

Page 23: ...re abnormal in all channels Begin Turn on the TV Check if XP1 9 on the main board is 3 3V if it s 0V check the power supply of the power board A green indicator lights Check if the pin3 of XP1 on the main board is high level 5V if not check the power board and NP2 No No Display picture No Check if the power supply of main board is normal Then check the power supply of each IC if the crystal starts...

Page 24: ...eck the power board No sound No picture Power board problem Refer to 3 checking procedure Refer to 4 checking procedure No Yes Check the power board With picture but no sound Check if the voltage of sound amplifier of XV2 in main board is normal No Yes Check if RV12 RV13 inputs signals Check NV1 and its peripheral circuit Check NV3 NV2 NB12 and their peripheral circuit Yes No ...

Page 25: ...eral circuit Refer to 6 7 8 9 10 11 12 checking procedure Check if CB106 and CB49 input signals AV IN Check if LB7 LB8 input signals S Video Yes No Yes No Check if pin20 of NB8 outputs signals Check N105 N106 and the circuit from AV terminal to N104 Check N100 CB153 and their periphery circuit Check NB8 and its periphery circuit Check the power supply of N100 on the image processing board Check th...

Page 26: ...ATSC channel please check N228 emphatically Check if pin4 of TUN1 output signals Yes No Yes Check if CB154 outputs signals Check TUN1 power supply and the peripheral circuit Check N100 and its periphery circuit Check if pin20 21 of TUN1 output signals Yes No Yes No Check if the crystal is normal If output signal Check TUN1 power supply and the peripheral circuit Check socket N100 and the periphery...

Page 27: ...V DC of N503 pin12 Check N503 or peripheral circuit Supplementary power supply N502 has problem N N N Y Y Y No DC voltage output Check if DC voltage of C550 is 3 3V 5V Check if DC voltage of V505 B is 24V Check if DC voltage of C541 is 12V Problem exits in FU502 or there is shortage on the main board Check N503 T501 or D516 Main board has problem or It didn t send out high level control signal Che...

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Page 39: ...odel Part name No LC 32HA37 Key board 667 26HA37 05 IR receiver board 667 26HA37 09 Interface board 667 26HA37 29 Digital processing board 667 26HA37 69 Power board 667 32HA37 20 Remote control 301 D26HA37 12A Panel 335 32017 00 ...

Page 40: ...603 L32HA37 10 Ver 1 0 ...

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