Casio CTK-520L - Technical Reference; Troubleshooting Common Issues; Keyboard Specifications

Item Code No. Parts Name Specification Q R
Main PCB
1 6925 1290 Main PCB ass'y M240438*1 1 B
LSI1 2012 3430 LSI, CPU MSM6755B-07 1 A
LSI2 2012 3843 LSI, ROM MX23C1010MC-12CA45 1 A
IC1 2105 5922 IC RH5VL40AA-T1 1 A
IC2 2105 4452 IC HD74HC174FPTR 1 A
IC3 2105 5796 IC HD74HC4511FPTR 1 A
Q1 - Q4 2259 2555 Transistor, Chip, Digital UMW1NTL 4 A
Q5 - Q8 2259 2562 Transistor, Chip, Digital UMS1NTL 4 A
Q9 2259 2646 Transistor, Chip, Digital UMH3NTN 1 A
Q10 2259 2548 Transistor, Chip, Digital DTC143EUAT106 1 A
Q11 2252 1239 Transistor, Chip 2SC4081-T106Q 1 A
D1 2390 2576 Diode, Chip, Schottky RB501V-40TE-17
1
B
D3 2390 1820 Diode, Chip 1SS355TE-17
1
B
X1 2590 1526 Oscillator, Ceramic EFO-EN2005C4 1 B
LED1 2370 1141 LED, 7-seg. SL-9352-60 1 B
Sub PCB
2
6925 1300 Sub PCB ass'y M140411*1
1
B
IC301 2114 2891 IC, Power amp. LA4598 1 A
Q301 2251 0469
Transistor
2SB1237Q,R-TV6-T 1 A
Q302, Q305,
2220 1387 Transistor 2SC1740SQ-TP-T
3
A
Q306
Q304 2253 0455 Transistor 2SD1762E,F 1 A
Q307 2200 2449
Transistor
2SA933SQ-TP-T 1 A
D301, D302, 2390 1344 Diode 1SS133T-77-T 30 B
D305~D330,
D332, D335
D304 2360 1729 Diode, Zener MTZJ5.1A-T77-T
1B
D331, D333 2390 2408 Diode 1FWJ43N(TPA3) 2 B
D334, D336
2360 2002 Diode MTZJ5.6B-T77-T
2
B
LED301
2370 1106 LED MPR3338S-B99
1
C
J301
3501 7049 Jack HEC2305-01-330
1
B
J302
3612 0665 Jack YKB21-5006
1
B
LED PCBs
3 6925 1320 LED PCB ass'y LD1M M240426*1 1 C
4 6925 1330 LED PCB ass'y LD2M M240427*1 1 C
5 6925 1340 LED PCB ass'y LD3M M240428*1 1 C
6 6925 1350 LED PCB ass'y LD4M M240429*1 1 C
7 6925 1360 LED PCB ass'y LD5M M240430*1 1 C
2370 1330 LED KR3302X-J345K 61 B
Keyboard PCB
8 6925 1310 Keyboard PCB ass'y M140402*2 1 B
D701~D725, 2301 0101 Diode 1S2473-T-77-T 61 C
D731~D766
Mechanical Parts
9 6925 1640 Rubber button M240413-1
1B
10 6925 1650 Rubber button M240414-1
1
B
11 6925 1660 Rubber button M240374-1
1
B
12 6909 5890 Slide contact CSB-12D
1
B
13 3831 1043 Speaker S10JA13B
2
B
14 6921 5030 Slide knob M311859-1
1
B
15 6925 1550 Display plate M340415-1
1
C
16 6925 1700 White key set, LSK-CB M340489*1 4
A
17 6925 1710
White key set, LSK-CS M340489*2 1
A
18 6925 1720 Black key set, LSK-10P M140369-1 2
A
Notes: Q – Quantity used per unit
R – Rank
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