Vizio VX37L - 37" LCD TV Service Manual Download Page 17

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CONFIDENTIAL

DO NOT COPY

Page 9

File No. SG-0205

TROUBLE OF DC-DC CONVERTER

Start

J7 PIN 2,3,4

The voltage is about + 12V
while power switch on
1.J7 connection good
2.Check J7 Pin1 is up to 3V?
3.Check power board

The voltage is about + 5V
1.Check power board
2.Check power cable
connection J7

U1 pin 5 6 7 8

The voltage is about +5V
while power switch on
1.J1 connection good
2. Check U11 GPIO_7 Pin

U4 pin2

The voltage is about +3.3V
1.J1 to connection good?
2.Check U4

U6 pin 2

The voltage is about +3.3V
1.J1 to connection good?
2.Check U6

U8 pin2

The voltage is about    +3.3V
while power switch on
1.Check J1 Connect
2.Check U8

U5 pin2

The voltage is about +1.8V
while power switch on
1.Check U5

END

U7&U8&U10

The voltage is about +1.8V
while power switch on
1.Check J1 Connect
2.Check U7&U8&U10

Summary of Contents for VX37L - 37" LCD TV

Page 1: ...Service Manual V Inc 320A Kalmus Drive Costa Mesa CA 92626 TEL 714 668 0588 FAX 714 668 9099 Top Confidential Model VIZIO VX37L HDTV ...

Page 2: ...4 Factory Preset Timings 4 1 5 Pin Assignment 5 1 6 Main Board I O Connections 6 1 7 Theory of Circuit Operation 7 1 8 Waveforms 8 1 9 Trouble Shooting 9 1 10 Block Diagram 10 1 11 Spare parts list 11 1 12 Complete Parts List 12 1 Appendix 1 Main Board Circuit Diagram 2 Main Board PCB Layout 3 Assembly Explosion Drawing Block Diagram ...

Page 3: ...io communications However there is no guarantee that the interference will not occur in a particular installation If this equipment does cause unacceptable interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures reorient or relocate the receiving ante...

Page 4: ...just function for automatic adjument of screen display 6 Smoothing function enables display of smooth texts and graphics even if image withresolution lower than 1366x768 is magnified 7 Picture In Picture PIP funtion to show TV or VCR images 8 Power saving to reduce consumption power too less than 3W 9 On Screen Display user can define display mode i e color brightness contrast sharpness backlight ...

Page 5: ... WITH AI 2000 Typ Luminance White 500 cd m2 Typ Display Operating Mode normally Black Surface Treatment Hard Coating 3H Anti glare treatment of the front polarizer 2 OPTICAL CHARACTERISTICS Viewing Angle CR 10 Left 89 typ Right 89 typ Top 89 typ Bottom 89 typ 3 SIGNAL Refer to the Timing Chart Sync Signal 1 Type TMDS 2 Input Voltage Level 90 240 Vac 50 60 Hz 4 Input Connectors RJ11 D SUB15PIN MINI...

Page 6: ...trength so that external force is not transmitted directly to the module 3 Please attach the surface transparent protective plate to the surface in order to protect the polarizer Transparent protective plate should have sufficient strength in order to the resist external force 4 You should adopt radiation structure to satisfy the temperature specification 5 Acetic acid type and chlorine type mater...

Page 7: ... operation of circuits It should be lower than following voltage V 200mV Over and under shoot voltage 2 Response time depends on the temperature In lower temperature it becomes longer 3 Brightness depends on the temperature In lower temperature it becomes lower And in lower temperature response time required time that brightness is stable after turned on becomes longer 4 Be careful for condensatio...

Page 8: ...efully by people who are electrically grounded and with well ion blown equipment or in such a condition etc 2 When the module with protection film attached is stored for a long time sometimes there remains a very small amount of glue still on the bezel after the protection film is peeled off 3 You can remove the glue easily When the glue remains on the bezel surface or its vestige is recognized pl...

Page 9: ...100 e Color saturation 0 100 f Tint hue 0 100 g Sharpness 0 7 h Color Temperature Cool Normal Warm Custom B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treble 0 100 d Balance 0 100 e Surround ON OFF f Speakers ON OFF C Special Featuresř a Language English Français EspaĖol b Sleep Timer OFF 30Min 60Min 90Min 120Min c Analog CC OFF CC1 4 TT1 4 d Digital CC OFF CC1 4 Service1 6 e Digital CC Style f P...

Page 10: ...Picture Adjustř a Auto Adjust b Backlight 0 100 c Contrast 0 100 d Brightness 0 100 e Color Temperature 9300 6300 Custom f Tint 0 100 g H Size 0 255 h Horizontal Shift 0 63 i Fine Tune 0 31 B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treble 0 100 d Balance 0 100 e Surround ON OFF f Speakers ON OFF C Special Featuresř a Language English Français EspaĖol b Sleep Timer OFF 30Min 60Min 90Min 120Min ...

Page 11: ...Temperature Cool Normal Warm Custom B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treble 0 100 d Balance 0 100 e Surround ON OFF f Speakers ON OFF C Special Featuresř a Language English Français EspaĖol b Sleep Timer OFF 30Min 60Min 90Min 120Min c Analog CC OFF CC1 4 TT1 4 d PIP Position TL TC TR ML MR BL BC BR e Rest All Setting D Parental Controlř a Parental Lock Enable ON OFF b TV Rating c Move...

Page 12: ... 100 e Color saturation 0 100 f Tint hue 0 100 g Sharpness 0 7 h Color Temperature Cool Normal Warm Custom B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treble 0 100 d Balance 0 100 e Surround ON OFF f Speakers ON OFF C Special Featuresř a Language English Français EspaĖol b Sleep Timer OFF 30Min 60Min 90Min 120Min c PIP Position TL TC TR ML MR BL BC BR d Rest All Setting ...

Page 13: ...tor good 3 Is DC DC OK 4 Is U6 U4 3 3V working ok LED is lighting It is in power saving 1 Check video cable 2 Is the timing supported 3 Check sync input 4 Check VGASOG rout if analog SOG Is backlight on 1 Check J7 PIN 14 2 Is inverter ok 3 Is Power Board ok U11 no data out It means data to LVDS 1 Is J5 connecting OK 2 Check J7 5V 12V 3 Is panel ok 4 Check P3 D sub Input correct 5 Check analog inpu...

Page 14: ...o 2 Check DVD player U11 input 1 Check P2 P12 signal 2 Check signal between P2 and U11 IF AV1 AV2 mode 3 Check Tuner U11 IF TV mode 4 Check P12 IF S Video 5 Check U11 POWER 3 3V 6 Check Y1 is OK LVDS output 1 Check signal between U20 and U9 1 Chcak J5 Connect is good 2 Is panel working ok END U11 output 1 Check LVDS LINE 2 Check U11 clock 27MHz 3 Check U11 power ...

Page 15: ...ISPLAY CORRECTLY Start Input signal 1 Check video 2 Check host s setting P4 input 1 Check signal between P4 2 Check power 12V 5v U11 input 1 Check signal between U11 P4 2 Check U11 Clock 27MHZ LVDS output 1 Check U11 2 Check U11 power 3 3V 1 25v 1 8v 1 Is J5 connected good 2 Is panel working ok END ...

Page 16: ...T DISPLAY CORRECTLY Input signal Start 1 Check video 2 Check host s setting U31 input 1 Check p10 p11 connect 2 Check signal between U31 and U19 U11 no data 1 Check U11 power 2 Check between signal U19 and U11 3 Check U19 clock 27MHZ 1 Is J6 connected good 2 Is panel working ok END ...

Page 17: ... cable connection J7 U1 pin 5 6 7 8 The voltage is about 5V while power switch on 1 J1 connection good 2 Check U11 GPIO_7 Pin U4 pin2 The voltage is about 3 3V 1 J1 to connection good 2 Check U4 U6 pin 2 The voltage is about 3 3V 1 J1 to connection good 2 Check U6 U8 pin2 The voltage is about 3 3V while power switch on 1 Check J1 Connect 2 Check U8 U5 pin2 The voltage is about 1 8V while power swi...

Page 18: ... TROUBLE OF DDC READING Start Analog DDC Support DDC1 2B 1 Analog cable ok 2 Check signal U20 to P3 3 Check U20 Voltage 4 Is compliant protocol HDMIDDC Support DDC1 2B 1 Analog cable ok 2 Check signal U32 to P10 3 Check signal U34 to P11 4 Is compliant protocol END ...

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