Instruction/ maintenance manual of the product CTK-220L Casio
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ELECTRONIC KEYBOARD CTK-220L CTK-220L 25 RHYTHMS POWER/MODE FINGERED CASIO CHORD NORMAL VOLUME SYNCHRO/ FILL-IN START/ STOP TEMPO TONE SONG BANK STEP 1 STEP 2 STEP 3 MULTI FUNCTION DISPLAY DE.
CONTENTS Page Specifications ................................................................................................................................... 1 Block Diagram ..........................................................................
— 1 — SPECIFICA TIONS GENERAL Number of keys: 49 Polyphonic: 12-note Preset tones: 100 Transpose: F# ~ C ~ F: half-note Auto-rhythms: 25, Tempo: Adjustable, 216 steps (40 ~ 255), initial value: 12.
— 2 — BLOCK DIAGRAM Buttons Illuminant Keyboard 7 seg. LED LED Latch IC2, IC3 Q5 ~ Q8 Q1 ~ Q4 PG X1, Q11 Reset IC IC1 Power Supply Circuit Q301 ~ Q304 D334, D336 Amp.
— 3 — LX0 LX1 LX2 LX3 LX4 LX5 LX6 LX7 LY1 D4 D3 C3 C2 G#2 F#2 D#2 C#2 LY2 C4 E3 B2 D2 A#2 C#3 D#3 F#3 LY3 B3 F3 A2 E2 D#4 C#4 A#3 G#3 LY4 A3 G3 G2 F2 C#5 A#4 G#4 F#4 LY5 E4 C5 D5 B5 D#5 F#5 G#5 A#.
— 4 — Pin No. Terminal In/Out Function 1 MA14 — Not used. 2 MWEB Out Clock for LED latches 3 ~ 5 — — Not used. 6 MA0 Out 7-seg. LED drive signal 7 ~ 19 MA1 ~ MA11 — Not used. 20 ~ 27 MD0 ~ MD7 Out 7-seg. LED drive signal 28, 29 NC1, NC2 — Not used.
— 5 — LG LVDD CPU LSI1 MSM6755B-13 LX0 ~ LX7 LY1 ~ LY7 Q1 ~ Q4 Q5 ~ Q8 Q2 ~ Q4 La ~ Lg (Common) (Segment) MWEB LED Latch IC3 7-segment LED Keyboard LEDs LED Latch IC2 MD0 ~ MD3 MD4 ~ MD7 MA0 Amp.
— 6 — 1 2 4 3 5 6 1 APO signal MSM6755B-13 pin 39 2 Reset signal RH5VL40AA pin 1 4 Sound signal JH connector pin 2 5 LED drive signal LX0 MSM6755B-13 pin 88 3 Clock MSM6755B-13 pin .
— 7 — 2 4 1 3 5 6 PRINTED CIRCUIT BOARDS Sub PCB KDM445-MA2M Top view Main PCB JCM446-MA1M Bottom view Top view GR 0 R 5 5 E R309 R324 VC JA3 5 5 D329 R354 Q305 C363 R353 R352 R342 5 5 125 5 5 75 .
— 8 — Connected to KDM4910K-KY2M Connected to KDM445-LD2M Note: KI signals are renamed. (e.g. KI0 on the keyboard PCB ⇒ KI1 on the main PCB) NO USE FOR CTK-330 NO USE FOR CTK-330 NO USE FOR CTK-.
— 9 — Sub PCBs KDM445-MA2M/MA3M.
— 10 — Keyboard PCBs KDM4910K-KY1M/KY2M.
— 11 — LED PCB KDM446-LD1M.
— 12 — PCB NAME LED PCB KDM445-LD2M.
— 13 — PCB NAME PCB NAME LED PCB KDM446-LD3M LED PCB KDM445-LD4M.
11 10 3 4 R-3 R-4 1 14 13 12 2 18 19 15 16 5 6 17 9 7 8 R-2 R-1 EXPLODED VIEW — 14 —.
Notes: This parts list does not include the cosmetic parts, which parts are marked with item No. "R-X" in the exploded view. Contact our spare parts department if you need these parts for refurbish. 1. Prices and specifications are subject to change with- out prior notice.
Item Code No. Parts Name Specification Q R Main PCB 1 6925 6160 Main PCB ass'y (MA1M) M240438*3 1 B LSI1 2012 4690 LSI, CPU MSM6755B-13 1 A IC1 2105 5922 IC RH5VL40AA-T1 1 A IC2 2105 4452 IC HD74.
MA1100761A Nov, 1996.
An important point after buying a device Casio CTK-220L (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Casio CTK-220L yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Casio CTK-220L - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Casio CTK-220L you will learn all the available features of the product, as well as information on its operation. The information that you get Casio CTK-220L will certainly help you make a decision on the purchase.
If you already are a holder of Casio CTK-220L, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Casio CTK-220L.
However, one of the most important roles played by the user manual is to help in solving problems with Casio CTK-220L. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Casio CTK-220L along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
