Alesis VX 49, Service Manual

Page: 16 / 30

1
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D D
C C
B B
A A
Size: A
Title: lqvhtlu_top_level.sch
Sheet 1 of 2
Date: 2019/5/22
Reviewed: Reviewed
Project State: ProjectState
Revision: PCBRev
ProjectCode
Purpose: MainFunction
Location: PCBLocationInSystem
Place Test Points Strategically
LED_OE#
SR_CLK
SR_STROBE
LED_DI
SW_DI
SW_DO
LED_DO
FOOTSWITCH
U_led_button_scan
lqvhtlu_led_button_scan.Sch
+3V3
GND
C312
225
TO MN
GND
+3V3 TP304TP305TP306TP307 TP300TP301TP302TP303
SR_CLK
SR_STROBE
LED_OE#
LED_DI
+3V3_POT
GND_POT
PAD_SEL
TO MN
Isolated Pass-through to From MN to TLU
TO TLL
LED_DO
SW_DI
+3V3
GND
GND
C311
225
SW_DO
SR_CLK_TLL
SR_STROBE_TLL
GND
TO TLL
FOOTSWITCH
PAD_BANK0
PAD_BANK1
PAD_BANK2
PAD_BANK3
3
5
7
9
11
13
15
17
19
18
20
2
4
6
8
10
12
14
16
1
J303
FH28E-20S-0.5SH(05)
3
5
7
9
11
13
15
17
19
18
20
2
4
6
8
10
12
14
16
1
J300
FH28E-20S-0.5SH(05)
3
5
7
9
11
13
15
17
19
18
20
2
4
6
8
10
12
14
16
1
J301
FH28E-20S-0.5SH(05)
3
5
7
9
11
13
15
17
19
18
20
2
4
6
8
10
12
14
16
1
J302
FH28E-20S-0.5SH(05)
BOLT301
BOLT
BOLT302
BOLT
BOLT303
BOLT
BOLT300
BOLT
BOLT305
BOLT
BOLT306
BOLT
BOLT307
BOLT
BOLT308
BOLT
BOLT309
BOLT
BOLT310
BOLT
BOLT311
BOLT
C313
No Stuff C314
No Stuff C315
No Stuff C316
No Stuff C317
No Stuff C318
No Stuff C319
No Stuff C320
No Stuff
GND
C321
No Stuff C322
No Stuff
GND