CASIO CTK50 Repair Manual

$7.99

CASIO CTK50 - It's a complete service manual, and it's in PDF format. It contains circuit diagrams ( schemas ) etc. It also usually contains parts catalog. After placing order we'll send You download instructions on Your email address. See below for delivery information

The manual is available only in language(s): English

Link to manual will be sent on Your email address after You place order.

This product was added to our catalog on Monday 07 May, 2007.

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Paul Brady - 01/03/2007

Talk about a lifesaver!!!!!!!!!!!! This schematic will also work for the Radio Shack DX-392. This is the full blown service manual complete with alignment instructions, schematics, and parts lists.

Francisco Dorfman - 06/13/2007

I was thinking I will never find this manual. User-Manuals had saved my Teac V-7010 which is full of specific functions. Superfast service, excellent document. Thank you very much!

Adam Solitro - 12/24/2007

Hi guys, Thank you for the fast and reliable service that your company offers. Great Work :)

John Craig - 07/31/2006

Very nice site and the manual is great. A life-saver. Thank you so much!

Fabian Castle - 08/01/2006

Thanks for the excellent service. The manual arrived quickly and in excellent condition. Quality A+++!

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Click to see text excerpt from the manual

CPU (LSI201: MSM6387-13)
The CPU contains a sound data ROM and a DAC (Digital to Analog Convertor), and it provides a sound
waveform in accordance with the pressed key and the selected tone.
The following table shows the pin functions of LSI201.
Pin No.TerminalIn/ OutFunction
1, 2TEST1, TEST2Not used. Connected to ground.
Power ON reset terminal. When the power switch is
3RESETInturned on, the terminal receives a low level signal and
the internal circuits of the LSI are initialized.
4AVDDIn+5 V sorce for the built-in DAC
5OUTOutSound waveform output
6AGNDInGround (0 V) source for the built-in DAC
7GNDInGround (0 V) source
8COSIIn21.725 MHz clock pulse input
9COSONot used.
10VDDIn+5 V source
11 ~ 18KI0 ~ KI7InInput terminals from keys and switches
19, 20KO11, KO10Not used.
21 ~ 30KO9 ~ KO0OutKey and switch scan signal outputs
FILTER BLOCK
Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the
waveform.
AVDD
Q201
2SC1740SQ
R203R204
From CPU
C203
C201
To main volume
C202
R202
AGAG
N 5 N