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Vizio Gallevia GV42L, Service Manual

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Vizio Gallevia GV42L Service Manual Download Page 18

CONFIDENTIAL – DO NOT COPY

Page 9-

5

File No. SG-0198

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TROUBLE OF DC-DC CONVERTER

Start 

J7 PIN10,11,12 

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 Pi

n

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 pin2 

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

 U7&U8&U10

Summary of Contents for Gallevia GV42L

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 L42HDTV10A VIZIO GV42L HDTV ...

Page 2: ... 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 1 Complete Parts List L42 HDTV10A _LG 12 1 12 2 Complete Parts List GV42L HDTV_LG 12 2 Appendix 1 Main Board Circuit Diagram 2 Main Board PCB Layout 3 Assembly Explosion Drawing Block Diagram ...

Page 3: ...ence to radio 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 rec...

Page 4: ...ust 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 s...

Page 5: ...ITH AI 1100 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 3...

Page 6: ...o that uneven force ex Twisted stress is not applied to the module And the case on which a module is mounted should have sufficient strength 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 exte...

Page 7: ...ading 9 Do not open the case because inside circuits do not have sufficient strength 9 2 OPERATING PRECAUTIONS 1 The spike noise causes the mis 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 l...

Page 8: ...fully 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 ple...

Page 9: ...ture Adjustř a Picture Mode Standard Movie Game Custom b Backlight 0 100 c Contrast 0 100 d Brightness 0 100 e Color saturation 0 100 f Tint hue 0 100 g Sharpness 0 7 h Color Temperature Cool Normal Warm Custom i Advanced Picture Adjust 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 ...

Page 10: ...ner Setupř a Tuner Mode Cable Air b Auto Search c Skip Channel d Digital Audio Out PCM Dolby Digital e Time Zone Eastern Indiana Central Mountain Arizona Pacific Alaska Hawaii E Parental Controlř a Parental Lock Enable ON OFF b TV Rating c Move Rating d Block Unrated TV NO Yes e Access Code Edit RGB Mode A Picture Adjustř a Auto Adjust b Backlight 0 100 c Contrast 0 100 d Brightness 0 100 e Color ...

Page 11: ...Min 90Min 120Min c PIP Position TL TC TR ML MR BL BC BR d Rest All Setting AV COMPONENT MODE A Picture Adjustř a Picture Mode Standard Movie Game Custom b Backlight 0 100 c Contrast 0 100 d Brightness 0 100 e Color saturation 0 100 f Tint hue 0 100 g Sharpness 0 7 h Color Temperature Cool Normal Warm Custom i Advanced Picture Adjust B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treble 0 100 d Bala...

Page 12: ...rental Lock Enable ON OFF b TV Rating c Move Rating d Block Unrated TV NO Yes e Access Code Edit HDMI MODEř A Picture Adjustř a Picture Mode Standard Movie Game Custom b Backlight 0 100 c Contrast 0 100 d Brightness 0 100 e Color saturation 0 100 f Tint hue 0 100 g Sharpness 0 7 h Color Temperature Cool Normal Warm Custom i Advanced Picture Adjust B Audio Adjustř a Volume 0 100 b Bass 0 100 c Treb...

Page 13: ...NFIDENTIAL DO NOT COPY Page 3 5 File No SG 0198 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 14: ...r 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 input ...

Page 15: ... DVD player U11 input correct 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 correct 1 Check signal between U20 and U9 1 Chcak J5 Connect is good 2 Is panel working ok END U11 output correct 1 Check LVDS LINE 2 Check U11 clock 27MHz 3 Check U11 power ...

Page 16: ...LY Start Input signal good 1 Check video 2 Check host s setting P4 input correct 1 Check signal between P4 2 Check power 12V 5v U11 input correct 1 Check signal between U11 P4 2 Check U11 Clock 27MHZ LVDS output correct 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 17: ...Y CORRECTLY Input signal good Start 1 Check video 2 Check host s setting U31 input correct 1 Check p10 p11 connect 2 Check signal between U31 and U19 U11 no data out 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 18: ...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 powe...

Page 19: ...OUBLE OF DDC READING Start Analog DDC OK Support DDC1 2B 1 Analog cable ok 2 Check signal U20 to P3 3 Check U20 Voltage 4 Is compliant protocol HDMIDDC OK 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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