Roland KC-550 - KC-550 Circuit Diagram (2;4)

37
Aug.2005 KC-550 KC-350
36
KC-350 CIRCUIT DIAGRAM (2/4) fig.kc350sch2
MIDDLELOW HIGH
VOLUME
TONE CONTROL
SHAPE
SHAPE ON
SHAPE OFF
MIDDLELOW
SHAPE OFF
SHAPE ON
HIGH
+10.0dBu
PRE BOARD
from PS BOARD CN12 W7
to AMP BOARD CN9 W5
HIGH_1LOW M IDDL E HI GH _2
PS1 BOARD(EQ Sect.)
MAIN R
MUTE FET
MUTE FET MUTE TR
MUTE TR
SUB_OUT
MUTE FET MUTE TR
MUTE TR MUTE FET
MUTE TR
A
AA
A
A
A
-15
+
15
+
15
-15
-15
A
+
15
A
A
A
AAA
-15
+
15
+
15
-15
AA A
+
15
-15
A
+
15
-15
A
+
15
A
-15
+
15
A A
A
+
15
A
A
A
-15
+
15
+
15
+
15
-15-15
-15
A
A
A
AAA
A A
A
A
A
+
15
-15
A
+
15
-15
-15 +
15
AA
-15 +
15
R209 6.8k C145 C-220p
R308 3.9k
C250 F-0.12 C246 F-0.47
C247 F-0.082 C251 F-0.0082 C254
F-0.022
R316 820
R312 220
R320 39k
R324 3.9k
R319 68k
R323
3.9k
VR7A
RK11K112 20kBcc
VR8A RK11K112 20kBcc
C245 C-1000p
C148 E-10/16
VR9A
RK11K112 10kB
C143 C-47p
R343 47k
C149 E-10/16
R307 1.8kVR6A
RK11K112 20kBcc
R344
8.2 k
R315 820
R20 47k
Q33
2SC2240GR
Q34
2SC2240GR
+ -
IC11A M5218AL
2 3
1
+ -
IC10A M5218AL
2 3
1
+ -
IC10B M5218AL
6 5
7
C257 C-0.1
C256 C-0.1
C244 C-470p
R317 6.8k
R226 47k
R230 47k
R305 3.3k
R304 15k
R311 18k
R310 4.7kC151
E-10/16
R306 15k
C249 F-0.047 C253 F-0.0082
+ -
IC11B M5218AL
6 5
7
R224 47k
R309 18k C150
E-10/16
R303 1k
PSW1B
SPUP128100
R221 47k
C255 F-0.0033
PSW1A
SPUP128100
R318 2.2k
R314 220
R223 47k
R322 68k
R313 10k
Q36
2SC2240GRR326
3.9k
C252 F-0.12
R321 33k
C248 F-0.47
R325 3.9k
Q35
2SC2240GR
LED1 L-934MBD
R3 2.2k
CN13
B9B-PH-K
1 2 3 4 5 6 7 8 9
R364 3.9k
CN17
B10B-PH-K
1 2 3 4 5 6 7 8 9 10
C305 C-0.1
C306 C-0.1
C307 C-0.1 C310 C-0.1
R256 47k
R328 5.6k R332 15k
C269 F-0.0039
C265 F-0.47 C267 F-0.12
R338 2.2k
R337 5.6k
R331 47k
Q38
2SC2240GR
C264 C-100p
R341 3.9k
R339 27k
C266 F-0.18
Q37
2SC2240GR
R336 1.5k
R342 3.9k
R340 68k
C268 F-0.015
R329 22k R333 2.2k
R330 220 R334 22k
R335 10k
C271 NIU
C270 NIU
R327 JW
C293 C-0.1C294
F-0.12 R351 2.2k
R347 18k R349 2.2k
R355 22k R352 4.7k
R353 4.7k
C295 C-47p
CN4
B4B-PH-K
1 2 3 4
+ -
IC12C M5218AL
84
C216 C-0.1 C222 C-0.1
R263 1M
D48 1SS133
R258
47k
Q29
2SK30ATM-GR
C296 E-10/16
+ -
IC12B M5218AL
6 5
7
+ -
IC12A M5218AL
2 3
1
WP23
W12
1 2 3 4 5 6 7 8 9
10
R195 220 R345 6.8k
Q28
2SC2878A
C297 NIU
C300 NIU
C299 NIU C298 NIU
C166 E-10/16
C308 E-220/35 C309 E-220/35
+ -
IC10C M5218AL
84
+ -
IC11C M5218AL
84
C215 C-0.1
C220 C-0.1 C214 C-0.1
C221 C-0.1
-4.5dBu / 462mV
+10.0dBu / 2.45V
+10.0dBu / 2.45V
+10.0dBu / 2.45V
+10.5dBu / 2.60V
+1.5dBu / 920mV