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Roland 715A VCF

Based on the Roland 715A VCF

Category: Other· Filters Wahs and VCFs
Price: see vendor
Tags: Filters Wahs and VCFs

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 86 rows

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Check before you build · 3 values the reader of this schematic was not sure of

Frequency (VR11): taper written 100K(C) on one gang and 100K(6) on the other; could be B
C88: designator could read C83
R84: 4.7M, small handwriting

Ref	Value	Normalized	Type	Notes
Resistors 43
R1	100K	100k		read from the schematic by eye
R2	100K	100k		read from the schematic by eye
R3	100K	100k		read from the schematic by eye
R4	100K	100k		read from the schematic by eye
R5	560	560		1/2W; read from the schematic by eye
R6	560	560		1/2W; read from the schematic by eye
R10	1K	1k		drawn like a coil but labelled R10 1K; read from the schematic by eye
R11	1K	1k		read from the schematic by eye
R12	10K	10k		read from the schematic by eye
R13	10K	10k		read from the schematic by eye
R14	10K	10k		read from the schematic by eye
R15	15K	15k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R17	1K	1k		read from the schematic by eye
R18	1.2K	1.2k		read from the schematic by eye
R19	100K	100k		read from the schematic by eye
R29	100K	100k		read from the schematic by eye
R39	100K	100k		read from the schematic by eye
R49	100K	100k		read from the schematic by eye
R51	330K	330k		read from the schematic by eye
R61	100K	100k		legend R61~R69 100K; read from the schematic by eye
R62	100K	100k		legend R61~R69 100K; read from the schematic by eye
R63	100K	100k		legend R61~R69 100K; read from the schematic by eye
R64	100K	100k		legend R61~R69 100K; read from the schematic by eye
R65	100K	100k		legend R61~R69 100K; read from the schematic by eye
R66	100K	100k		legend R61~R69 100K; read from the schematic by eye
R67	100K	100k		legend R61~R69 100K; read from the schematic by eye
R68	100K	100k		legend R61~R69 100K; read from the schematic by eye
R69	100K	100k		legend R61~R69 100K; read from the schematic by eye
R70	100K	100k		read from the schematic by eye
R71	100K	100k		read from the schematic by eye
R72	560	560		1/2W; read from the schematic by eye
R73	560	560		1/2W; read from the schematic by eye
R81	330K	330k		read from the schematic by eye
R82	1M	1M		read from the schematic by eye
R83	1M	1M		read from the schematic by eye
R84	4.7M	4.7M		1/2W; read from the schematic by eye
R85	100K	100k		read from the schematic by eye
R86	10K	10k		read from the schematic by eye
R87	1M	1M		read from the schematic by eye
R88	2.2K	2.2k		read from the schematic by eye
R89	1K	1k		read from the schematic by eye
R90	100K	100k		read from the schematic by eye
Capacitors 23
C1	1uF	1u		drawn 1/25, 25V electrolytic; read from the schematic by eye
C2	1uF	1u		drawn 1/25, 25V electrolytic; read from the schematic by eye
C3	100uF	100u		drawn 100/16, 16V electrolytic; read from the schematic by eye
C11	.022uF	22n		read from the schematic by eye
C12	.022uF	22n		read from the schematic by eye
C51	.01uF	10n		read from the schematic by eye
C52	.01uF	10n		read from the schematic by eye
C61	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C62	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C63	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C64	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C65	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C66	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C67	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C68	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C69	.1uF	100n		legend C61~C69 .1; read from the schematic by eye
C71	10P	10p		read from the schematic by eye
C72	10P	10p		read from the schematic by eye
C81	.01uF	10n		read from the schematic by eye
C82	.01uF	10n		read from the schematic by eye
C84	.1uF	100n		read from the schematic by eye
C86	.1uF	100n		read from the schematic by eye
C88	1uF	1u		drawn 1/50, 50V electrolytic; designator could be C83; read from the schematic by eye
Diodes 2
D1	Diode	DIODE		no part number given; supply protection; read from the schematic by eye
D2	Diode	DIODE		no part number given; supply protection; read from the schematic by eye
Transistors 3
Q81	2SC945Q	2SC945Q		read from the schematic by eye
Q82	2SC945Q	2SC945Q		read from the schematic by eye
Q83	2SC945Q	2SC945Q		read from the schematic by eye
ICs 5
IC1	RC4558DN	RC4558DN		legend: all ICs RC4558DN or uPC4558 except as noted; read from the schematic by eye
IC11	RC4558DN	RC4558DN		legend: RC4558DN or uPC4558; read from the schematic by eye
IC12	RC4558DN	RC4558DN		legend: RC4558DN or uPC4558; read from the schematic by eye
IC61	TA7136P	TA7136P		single op amp; read from the schematic by eye
IC81	CD4001AE	CD4001AE		quad NOR; read from the schematic by eye
Potentiometers 5
Frequency	C100K	C100k	Potentiometer	VR11 dual gang (A/B); taper letter read as (C); read from the schematic by eye
Resonance	B50K	B50k	Potentiometer	VR12 dual gang (A/B); read from the schematic by eye
Level	A100K	A100k	Potentiometer	VR13; read from the schematic by eye
CH1 Level	A100K	A100k	Potentiometer	VR61; read from the schematic by eye
CH2 Level	A100K	A100k	Potentiometer	VR62; read from the schematic by eye
Switches 1
S11	SP3T	SP3T		LP/BP/HP filter mode selector; read from the schematic by eye
LEDs 4
D51	GL32AR	GL32AR		red; read from the schematic by eye
D52	GL32PG	GL32PG		green; read from the schematic by eye
D81	GL32AR	GL32AR		red; read from the schematic by eye
D82	GL32PG	GL32PG		green; read from the schematic by eye