Circuit Diagram (Panel) - Roland Boss RC-20XL Service Notes

Sep.2004

CIRCUIT DIAGRAM (PANEL)

L-34GDSL L-34YDSL
LED5 LED6
OVER
1 2 1 2
PLAY
DUB
L-34HDSL L-34HDSL
LED2 LED3
ONE REC
1 2 1 2
SHOT
L-34HDSL L-34HDSL
LED13 LED14
1 2 CENTER 1 2 FLAT_AMP
CANCEL SIM
L-312LRD L-312LRD
LED9 LED10
EXIT AUTO
1 2 1 2
START
AVcc
R2
330
POWER LED17
L-113GDT
02DZ5.1-Y N.I.U.
D9 D10
A
C10
AVcc
M5218AFP
IC1C 10/16
AVcc
R9
47k
-
C11 C15
10/16 N.I.U
+
R10
47k
D A A
C16 C12
N.I.U 10/16
22
(green)
LED1 L-34GDSL
GL3ED8 LED7 LOOP
TAP
1 2 1 2
PHRASE
3
TEMPO
L-34HDSL
(red) LED4 LOOP
1 2
QUANTIZE
L-34HDSL L-34HDSL
LED12 LED15
1 2 INST 1 2 NORMAL
MIC
L-312LRD L-312LRD
LED8 LED11
REVERSE WRITE
1 2 1 2
L-34HDSL
2SC4116GR
1 2
Q1 R3
R1 LED16 10k
C5
1.2k PEAK 1
R4 1/50
Q2 1 100k
2SC4116GR
C6
1/50
A
RD901-40-125F-AF5-00D (250KA) RD901-40-125F-AF5-00D (250KA)
VR4
INST
1 3
MIC
C13N.I.U
C7
10/16
R5 1M R6
1k
C9
R8
27k
10/16
2 IC1B
-
1
3 M5218AFP
+
IC1A
M5218AFP
SW7
D7 SKQKAB
MODE
2 1 2 1
D8
1SS352 2
SW5
D5 SKQKAB 1SS352
EXIT 2 1 2 1
D6
1SS352
2
SW3
D3 SKQKAB 1SS352
TAP
2 1 2 1
TEMPO D4
1SS352 2
SW1
D1 SKQKAH 1SS352
2 1 2 1
PEDAL_L
D2
1SS352
2
1SS352
VR1 RD901-40-125F-B54-11D (50KB 11clicks)
VR_VDD VR2
PHRASE
SELECT
C1 2
0.1
C2
N.I.U
VR5
1 3
C14N.I.U
C8
10/16
R7 1M
6
-
7
5
+
SW8
SKQKAH
1 1 2
PEDAL_R
SW6
SKQKAB
AUTO
1 1 2
START
SW4
SKQKAB
1 1 2
WRITE
SW2
SKQKAB
REVERSE
1 1 2
CN1
SW6 14
14
SW5 13
13
SW4 12
12
11
SW3
11
SW2 10
10
SW1 9
9
8 TO CN1 ON
LED_S4
8
LED_S3 7
JACK
7
LED_S2 6
6
BOARD
LED_S1 5
5
LED_S7 4
4
LED_S8 3
3
LED_S5 2
2
LED_S6 1
1
WIRING 14P
RD901-40-125F-B54-00D (50KB)
VR3 RD901-40-125F-B54-00D (50KB)
GUIDE LEVEL
2 2
C3 C4
N.I.U N.I.U
VR_VDD
CN2
14
14
VR1 13
13
12
VR2
12
VR3 11
11
AVcc
10
10
TO CN3 ON
9
9
PEAK_LED 8
JACK
8
POWER_LED 7
7
BOARD
MIC_IN 6
6
MIC_OUT 5
5
4
4
3
3
INST_OUT 2
2
INST_IN 1
1
WIRING 14P
A
RC-20XL
23