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CASIO CTK680
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of CASIO CTK680 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 14 (click to view)
LED DRIVING
LVDD

La ~ Lg, Lp

LD0 ~ LD7 CPU

IC301 BA612 LED Driver LC1 LC8

Q15 ~ Q18 LED Driver IC17 UPD65611GB-019-3BA P40 KO0 ~ KO3, KO5 P41

LSI14 HD6433294A33F

LG

Gate array

RESET CIRCUIT
When batteries are set or an AC adapter is connected, the reset IC provides a low pulse to the CPU. The CPU then initializes its internal circuit. When the power switch is pressed, the CPU receives a low pulse of POWER signal. The CPU provides APO signal to the power supply circuit and raises RESET signal to +5 V to reset the DSP, the key controller and the gate array.

Battery set VDD RESET Reset IC IC13 RH5VL36AA POWER From power switch APO To power supply circuit -NMI P42

VDD

DVDD Gate Array LSI17 UPD65611GB-019-3BA

DVDD DSP LSI11 HG51B155FD-1

CPU LSI14 HD6433294A33F

-RESET VDD Working Storage RAM LSI15 TC55257DFL-70L DVDD Key Controller LSI16 HG52E35P

â 14 â

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