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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
DX-V888W
� Press the ON/STAND-BY button. Is FL displayed ? Yes Is the SHARP logo screen displayed ? No Yes "The SHARP logo is not displayed." "FL is not displayed."
No
Is "ERROR" displayed ? No Can the tray be open or closed, and can the disc be changed ? Yes Is No Disc displayed ? No Can a Video CD be played ? Yes Can the Audio signal be heard ?
Yes
"ERROR is displayed."
No
"The changer mechanism is malfunctioning."
"No Disc is displayed." Yes
No
"The Video CD cannot be played normally."
"No sound is heard." No
Yes Is an audio signal being output from the microphone ? No Yes The microphone signal is not being output.
End
� The SHARP logo is not displayed.
Is the voltage on pin 52 (VREF) on IC14 (ES3883F) about 1.3 V ? Yes Is a 13.5 MHz clock signal available at pin 79 (PCLK) on IC14 ?
No
Check C173.
Check the soldering on IC14 and the voltage at each pin. No
Yes Is the signal shown in waveform drawing 8, 9 and 10 being supplied to pin 82 (HSYNC), pin 84 (VSYNC) and pin 86 (YUV7) on IC14 ? Yes Is a video signal available at pin 64 (VDAC) on IC14 ? Yes Check the terminal PWB connector and each transistor. No Check the soldering at pin 64 on IC14, and at R191 and R199. If there is no problem, IC14 is defective. Check the soldering on IC15 (ES4108F) and IC18 (16M S DRAM) and the voltage at each pin.
No
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