|
|
|
Who's Online
There currently are 5731 guests online. |
|
Categories
|
|
Information
|
|
Featured Product
|
|
|
 |
|
|
There are currently no product reviews.
 ;
Even if the PDF is a scan, I can read the information I need.
The price is affordable and the service (mail sending) is very fast.
Thanks ! Regards. William (Fan of Kenwood)
;
Very good quality original datasheet!I like this amazing website!!!!!!
 ;
Excellent just what I needed to replace the electrolytic caps and make this old gem a beauty again. Was as scan of the original photocopied service manual.
;
It was helpful to get schematic with waveforms in important points and lot of service information. Manual is good quality, fast delivered. Of course it is hardcopy of paper one with all its disadvantages.
;
I want to give you a real heads-up for your desire to enable such people as I to acquire the information I need to maintain the older types of equipment such as this Akai HXA351W. You do a swell job with all the processes you have to perform so I can have a legible, thus usable
document which does not send me crazy trying to figure out the blurry text of a bad copy.
Very well done, Thomas.
Horizontal Drive /B+ Drive circuit
H/B+ Drive signal (square pulse) is generated from ICH01 pin 8/6. The H Drive signal is switching QH05. and H-drive trans amplify QH06�s base drive current. B+ Drive signal is amplified by push pull (QH02, QH03) amplifier, this amprified signal the switching B+ voltage is supplied horizontal deflection coil though coil(TH02)
* Refer to the Schemathics in the Page 65 (Schematic Diagram 4-4)
Brightness Blanking Reset Control CRT
* Refer to the Schemathics in the Page 65 (Schematic Diagram 4-4)
Change the Brightness level by controlling the G1.
1) In normal working condition, the G1 waveform is synchronized with the vertical sync. Since the purpose is to blank the vertical flyback scanning line when vertical is flyback, so the Clamp/Blanking pulse of ICH1 pin16 through QF07 is used to control it. 2) Brightness control is via the control at pin35 of ICM01(WT62P1) and through the control at QF04 and QF05 to control the DC level of G1
Focus CRT
* Refer to the Schemathics in the Page 65 (Schematic Diagram 4-4)
Dynamic Focus is used to get perfect focusing of each dot on the screen. There are H-Focus and V-Focus:
ICH01 Pin 32 outputs a parabolic waveform (H+V Focus). QF08,QF09,QF13 amplify this focus signal.
Vertical Deflection CRT
* Refer to the Schemathics in the Page 62 (Schematic Diagram 4-1)
Vertical deflection Saw-tooth waveform is provided by ICH01 pin12, 13 (VOUT1, 2) and Vout1, Vout2 is input to Vertical Amplified IC(KA2142) Pin 1,10 This Signal is Amplified by ICV01(KA2142) and output via out pin6 of KA2142
--13--
|
|
|
> |
|
