REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Thursday, 28 February 2019

CASIO CTK-650 ELECTRONIC KEYBOARD – CIRCUIT DIAGRAM

Casio CTK-650 ELECTRONIC KEYBOARD – circuit diagram

Used ICs: A4598 – UPD6376CX – HD6433298A 16P – MN4464-08L-1 – HG52E35P – HG51B155FD – BA612 – LB-603VP1(Display)
Number of keys: 61
Polyphony: 32-note(max.)
Preset tones: 128
Magical preset: BREAK BEAT 16 MELODYCOMP 8
SHADOW DRUM 4 FREE SESSION 32
TONE STACK 40 KEY SPLIT 12
HYPERACTIVE 16
Auto-accompaniment: Rhythm patterns 128
Tempo Adjustable(40 - 255)
Chords Three system: CASIO CHORD, FINGERD,
FULL-RANGE CHORD
Other Variation pattern, fill-in pattern, intro/ending pattern for each rhythm.
Song memory: song:one
System:Real-time recording
Memory capacity:Up to 1,300 notes
Registration memory: 4 setups
Sound control pads: Phrases 10
Drums 10
SE/Percussion 10
Controller 2
Digital effects: REVERB 1, REVERB 2, REVERB 3, CHORUS, TREMOLO, PHASE SHIFTER, ORGAN SP, ENHANCER, FLANGER, EQLOUNDNESS
DEMO tunes: 3 tunes
Other functions: Transpose (F# ~ C ~ F : half-note)
Tuning adjustable A4 = 440KHz 50 cents increments
Volume control (Main /Accompaniment)
Speakers: 12cm diameter X 2 (Output:2W+2W)
I/O terminals: Power supply 9V DC jack
Headphones Stereo mini jack
Output impedance:100 ohm
Output voltage:4.5V(RMS. max)
Assignable jack Standard jack
MIDI IN, OUT
Power supply: 3-way AC/DC power sources;
Batteries Six D-size
Battery life Approximately 5 hours on R20P(SUM-1)
AC Required optional AD-5 AC adaptor
Car battery Required optional CA-5 car adaptor
Auto power off: Approximately 6 minutes after the last operation
Power consumption: 7.7W
Dimensions: 942 X 367 X 135 mm(HWD)
31 7/16" X 14 1/2" X 4 3/8" inches(HWD)
Weight: 5.2kg(11.7lbs) excluding batteries
Accessory: Score stand
Exploded view [Click on the pictures to magnify]
Circuit diagram
Circuit details

Posted By: FRANK at 03:48
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