|
Who's Online
There currently are 5101 guests and 3 members online.
|
Categories
|
Information
|
Featured Product
|
|
|
|
|
There are currently no product reviews.
;
I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
;
It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
;
Very fast service, best quality of the service manual and the schematics
;
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.
;
Hi, this is a very clear manual, nice copy, not quite up to the standard of the very best available but better than many others. I think the price was especially fair for a hard to find manual and I would certainly use this manual seller again. Recommended.
FLOW CHART NO.20 PLAYBACK MODE TROUBLESHOOTING Although picture playback is possible, colour does not appear in PAL or NTSC Playback picture does not appear (E-E mode is possible).
NO there FM signal (approx. 0.4Vp-p) input line between (79) and (78) Is voltage 5V applied to the chroma power Check peripheral circuit pins (61) of IC201
VC-AH975W VC-AH990A/W VC-AH770A/L/M/Ru
the (78) IC201. terminal at pin (61) of IC201? and Y/C 5V line.
YES
FM 0.4Vp-p) Is there chroma signal (approx. Check line between pins (60) and (46) of output from the pin (79) of IC201? 156mVp-p <PAL mode> or IC201 (C512).
NO NO YES
298mVp-p<NTSC mode> /burst) input in the pin (46) of IC201?
YES (81) IC201? Check whether the pins(73) and (75) of
Is the supply V-H.SW.P signal fed to pin For PAL/MESECAM mode.
NO
IC201 oscillate 4.43MHz. For NTSC mode. Is there chroma signal (approx. whether the pins(73) and (71) of Check V-H.SW.P line. 197mVp-p <PAL mode> or NO IC201 oscillate 3.58NHz. 375mVp-p<NTSC mode>/ burst) input to the pin (58) of IC201? Is there luminance signal (approx. 0.25Vp-p) NO
Check peripheral circuit of pins (13), (14) and (17) of IC201. For PAL/MESECAM mode.
NO input output in the pins (13), (14) and YES (17) of IC201?
Check parts arround of X501. Check parts arround of X502.
YES For NTSC mode.
Is there luminance signal (approx. 0.5Vp-p) NO Check line between pins (18) and (19) of inputted to pin (19) of IC201? IC201 (C206). Is there chroma signal (approx. 300mVp-p <PAL mode> or YES Check line between pins (58) and (35) of IC201 (R505, C515).
NO Check line between pins (21) and (42) of input to the pin (54) of IC201? Is there luminance signal (approx. 0.3Vp-p)
YES 286mVp-p<NTSC mode>/burst)
44
IC201 (C208). inputted to pin (42) of IC201? NO Is there chroma signal output from pin (55) 197mVp-p <PAL mode> or
YES
YES
YES
Is there chroma signal (approx.
Is there luminance signal (approx. 0.5Vp-p) NO Check line between pins (39) and (26) of IC201? 375mVp-p<NTSC mode>/ burst) inputted to (26) IC201 (C212). input in the pin (35) of IC201? Check line between pins (55) and (54) of IC201 (C514).
NO
NO YES
Is there luminance signal (approx. 0.5Vp-p) output from the pin (39) of IC201?
Replace IC201. Is voltage 5V applied to the CCD section power terminal at pin (36) of IC201?
NO
Is CCD control voltage approx. 5V normally to the (37) from pin (57) of IC201? Is clock signal (approx. 8.86MHz<PAL mode> or 7.16MHz<NTSC mode>/0.5Vp-p) for CCD applied normally to the pin (44) from (69) of IC201?
NO
Is there luminance signal (approx. 0.5Vp-p) inputted to pin (23) of IC201? Check line between pins (24) and (23) of IC201 (C210).
YES
Is there video signal (approx. 2.0Vp-p) outputted to pin (52) of IC201?
NO
Replace IC201.
|
|
|
> |
|