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

How to troubleshoot No Power fault with Sony LCD digital TVs – RB2G chassis

Applicable to
Sony KDL-50W700B Chassis RB2G HE-L
KDL-32W700B; 
KDL-42W700B, KDL-42W800B, KDL-42W805B; 
KDL-50W700B, KDL-50W790B, KDL-50W800B, KDL-50W805B, KDL-50W807B; 
KDL-55W700B, KDL-55W790B, KDL -55W800B, KDL-55W805B, KDL-55W807B.

No power – General troubleshoot

No power – AC adapter

No power – DC/Dc converter

No power - AYU2 control

No power – G board

No power – DC/DC converter check

No power – AYU2L control

No power – AYU2/AYU2L failure

No power – AYU2/ AYU2L replacement

How to replace the Mother board – Canon PowerShot SX520 Digital Camera

Canon PowerShot SX520 HS Motherboard Replacement procedure

If your camera is physically damaged, it's possible that the motherboard was affected as well. This page is a step-by-step guide on how to remove and replace the motherboard.
Battery
Using your fingers, slide the battery compartment door to the right until it unlocks.
Rotate the door along hinges to open.
Take out the battery with your fingers.

Back face
Remove Two 3.4 mm screws that secure the back panel using a Phillips #000 screwdriver.
Remove Four 4 mm screws on the left and right sides of the camera using a Phillips #000 screwdriver.
Remove Two 4 mm screws that secure the bottom of the camera using a Phillips #000 screwdriver.

Pull back the rubber facing to access the A/V and HDMI output compartment.

Remove One 3.4mm screw inside the compartment using a Phillips #000 screwdriver

Once all screws are removed, pull the back facing off with your fingers.

LCD screen

Remove Three 4.4 mm screws that secure the small metal plate using a Phillips #000 screwdriver.

Carefully pop out the LCD screen with your fingers.

Metal plate & Lens

Remove Six 4.4 mm screws that secure the metal cover using a Phillips #000 screwdriver.
Remove Two 2.5 mm screws that secure the back panel using a Phillips #000 screwdriver.
After all 8 screws are removed, pull the metal plate out with your fingers.

Unlcip the large cable by pulling up on the metal part with your finger.

Slide out the 2 smaller cables with your fingers.

Lift up the lens by grabbing the sides with your fingers.

Remove One 2.5 mm screw using a Phillips #000 screwdriver.

Disconnect the two orange serial cables at the top of the motherboard using your fingers

Gently remove the motherboard using your fingers.  [Too much force will break the motherboard.]

To reassemble your device, follow these instructions in reverse order.

Telefunken TKL2297S LCD TV SMPS Schematic

Sony STR-DG820 – AV receiver - schematic

Used ICs: uPC2581V-S – BD3471KS2 – SN74LV4052APWR – CXB1444R-T6 – SH9135CTU – SII9134CTU – TC74VHC541FT(EL) – M30620FCPGP U5C – D790E002BZDH300 – M12L64322A-6TG – LC89057W-VF4A-E – PCM1609APT – MB91F467RAPMC-GE1 – NJM2586AM

Digital audio

Display

DSP

HDMI

Micom

Video

Main