Yorkville Sound YCV50, YS1003 service manual Red

1

2

A B C D E F G H I J K L M N O P Q R S T U V

		K2:B		R58				1
		C34
		4N7	250V	1/4W
RED				220K
				.
W20	+249Vdc	R56		R57
		1/4W		1/4W
		47K		220K
				.
			50V	+249Vdc		T	R S	FOOTSWITCH
								J2
R1	1/4W 113K		C37 1N5
					K1:C	Gold	Gold .	2

3

4

J1

RING

YELLOWYELLOW

W2 W3

BLACK BLACK

W1 W4

	+158Vdc	C16
		47N	250V
		PRE-AMP
R4		12AX7A
		V1:A
1/4W
47K		2X_TRIODE_HCT
		{Body}
+1.2Vdc
R2 1/4W 1M	R3 1/4W 1K5	C1 1U 63V
		R5	1/4W 220K
			MINI

C33
1N	400V

R15 1/4W 47K		100K
		1B
	P8:A	TREBLE
	M
C23
47N	100V
		500K
		15A
	M	P7:A
		BASS
C22
47N	100V
		20K

CLEAN VOLUME

C35

220P 100V

500K 15A

M P9:A

R21

1/4W

100K

BRIGHT

R18 1/4W 113K
C24
22N	400V
+162Vdc
V2:B
PRE-AMP
12AX7A
+1.2Vdc

R112	C71
1/4W	470P	100V
27K
	R22
	1/4W
	100K
R19 1/4W 470K	R20 1/4W 100K

R23 1/4W 100K

R88 1.0W 1K Mini

Q11

MPSA06

5103

TO92

			4K7 1/4W R99
			R28 1/4W 10K
			5908 GRN	LD5 CHNL2
D2	4148			C45
	Q3			100N	50V
	MPSA06
		R111	Q6
		1/4W	BC550C
		1K			R31
	TO92	50V		1/4W
	5103				10K
			TO92
		C70 22U	5101

R29 1/2W 2K
R85 1/4W 47R		R84 1/4W 100R
R30 1/4W 2K2	5907 YEL	LD3 CHNL1

										R61
										1/4W
										620R
										50V
			R36 1/4W 100K							C56 22U
								R60 1/4W 620R		3
						U2:A
CHANNEL						50V	22U
		100V					C2	T	R	S J4
						NE5532N
UP
	UP					R109		-	-	-
S5:A	S5:B	C68 100N				1/4W
						100K				4
DOWN	DOWN		C4 22U 50V	R37 1/4W	100K	C66		PRE-AMP-OUT
						220P 100V
								R108
								1/4W
								10K

5

K2:A

15A

M P6:A

MID

UP	UP
DOWN	DOWN
S6:B	S6:A

						C15	22U 50V
R16	1/4W	1M	R17	1/4W	1K5

R26 1/2W 2K

K2:C

63V
C67 470N						-AMP-IN	5
	22U	C6	T	R	S
	50V					PWR

6

7

K1:A
C80 1N 400V		R6 1/4W			+249Vdc
			.
			249K	400V
		116Vdc	C81	1N
				C17		C18	R114
		V1:B		2N2	400V	1N5 200V	1/4W
	500K						100K
	15A		PRE-AMP

R11 1/4W

159Vdc

PRE-AMP 12AX7A V2:A

113K		1000V
	C82	470P

+249Vdc

		C32
		470P	100V
			100K
			1B	R14
C19	R13 1/4W	33K
				100K
		.	M P2:A	1/4W
100N	250V			RAD
			TREBLE
		C20
		47N	100V
			500K
			15A

K1:B

D1	4148	R25 1/4W 10K
		C46
		1N	50V
	MPSA06		R82 1/4W 47R	R83 1/4W 100R
	Q2
		Q7
		BC550C
	5103		R32
			1/4W
	TO92	C69 63V2U2	10K	LD4 BOOST
	R34 1/4W 2K2		R27 1/4W 2K2 5906 RED
		TO92
		5101

BOOST

UP	UP
S4:A	S4:B
DOWN	DOWN

					Gold .	.
			R38 1/4W 100K			J3
					R107	6
			R59 1/4W	MINI	1/4W
					10K
				10K
	U1:A
C3
22U	50V
	NE5532N
	R40					7
	1/4W				C14 22U 50V
	27K		R39 1/4W 100K
	C65
	470P	100V

8

9

10

11

12

13

14

15

16

17

R9 1/4W 120K

M	P1:A	12AX7A	R8 1/4W 120K
	DRIVE
	0.8Vdc			C31 1N 50V
	R7 1/4W 1K5	C26 330N 63V	R10 1/4W 120K

				1.2Vdc
	63V	R12	1/4W	1K5
C27	470N

M BASSP3:A

C21
47N	100V

20K 15A

M P4:AMID

		250V
C83		4N7
R33
	1/4W		47K
			RAD

500K 15A

R24

1/4W

MP5:A 47K

MASTER

22U C7		R64
		1/4W
50V		47K
			8
4148	D17 D16	4148	V- V+

U2:B

U2:C

NE5532N

16V 100U

C9

VOLUME

20K

C36		R62
		1/4W
2N2	400V
		270K

R51

1/4W

470K

+170Vdc

PRE-AMP 12AX7A

	-50Vdc
				R74	4007		C52
				1/4W	D11	250V	100N
				2K2
1M 1/4W R73	D14 0W5	51V0 1N5262B	C13 63V 100U	C44 63V 10U	36K 1/4W R75	36K 1/4W R113

6467 10K NTC R63	Q9
	BC550C
	TO92
	5101
	20V0	1N5250B
.	D24	0W5
R53 1/4W 2K7

R54 1.0W	1K Mini
6399 YEL	LD1
6398 RED	LD2

R52

1/4W

2K2

			4	R67
	R55 1/4W			1/4W
		4K7		10K
				C64
STANDBY		R97
				4N7	250V
		1/4W
	UP	10K	C8	100U16V
		R65 1/4W 47K
S3:B	S3:A
		R66
	DOWN	1/4W
		47R

R70 1/4W 18K

REVERB SEND

J8

R119 1/4W 18K	J7
	REVERB RTN

MASTER M

20K

15A

P11:A M

15A

P10:A

REVERB

C47
10N	100V
			V3:A
	R45 1/4W	1M	+28Vdc
R48			R47
1/4W
10K			1/4W
			470R
	R46 1/4W	1M	PRE-AMP
			12AX7A
C48
100N	100V

	C49
	22N	400V
R43 1/4W 82K		R41 1/4W 220K
		MINI
	+249V
R44 1/4W 100K		R42 1/4W 220K
V3:B		MINI
	C50
	22N	400V

+415Vdc

Transformer

3682

3682

3682

3

W26

SPST Switch

W9

W8

RED

3682

1

W28

F1

S7

BLK

+33Vdc

Q1

RED

7824

IN

OUT

T2A

4

3682

D3

GND

275V

W13

6731

T2

5

4007

TO220

GRY

D4

C53 22N

1324

4007

IEC_RECT

YEL

3682

4007

GRY

W12

D5

63V

BLK

6

4007

7

2

C38

470U

250V

GRN

D6

3682

3682

GRN

3682

W11

W10

W16

8

C54 4N7

3682

W27

100V C75

R71 1/4W

10K

82N 100V

D7

4007

R98	1/4W	.
		330K
			R103
				1/4W	470K

C11 100N	8	U1:B
	V+
		U1:C

50V 22U

R49

1/4W

4K7

R35 1/4W 1K5

+168Vdc

	D8
+24Vdc	4007
	4007
	D9
	4007
	D10
100V

6880

14N35

2

U3:A

6	D12	4007
5
4		250V
U3:B
	C28	220N

R50 1/4W	.
	330K
	R102
	1/4W
	470R
R81 1/4W 2M2	1N5240BRL 0W5 D13
Q12
BC550C

Q8 IRF830

	D
G	R104 2.0W
	S

10V0

	R68 1/4W 120K
150K	10MM	50V
		C10 22U

R69

1/4W

120K

V-	NE5532N
4
	R72
	1/4W
	1M
C63
47P	100V

C12

	25V
C57 100N	C5 100U	450V
		C55 82U

R110 2.0W 220K 10MM

250V

C84 220N

		R101
5101		1/4W
		2K2			RED
TO92						10K
					3682
4148	D15	R100	2.0W	3R9	W19	{T}
					.	4520
					+410Vdc	P12
4148	D23					M BIAS

NA: BIAS 350 mV ACROSS R91 AND 350mV ACROSS R92 CE: BIAS 300 mV ACROSS R91 AND 300mV ACROSS R92

3Vac	3Vac		12AX7A	Val
	R96 1/8W 100R0	R95 1/8W	V3:C	V5:B	V4:B
			100R0
	FLMP		FLMP
			{Voltage}
			{Body}

IRF830

MJE340

MPSA06

G D S E C B E B C C B E

"STYLE_P32" TO-220 TO-126 TO-92 TO-92

V1:CV2:C

2X_TRIODE_HCT 2X_TRIODE_HCT

	+400Vdc	W21
		3682
R93	R94	R94B
5.0W
1K	8K2	8K2
	1/2W	1/2W
	R106
	1/4W
	100K
450V	450V	450V
C39 10U	C40 10U	C60 10U

	Q10
	MJE340
1N5262B	D22
0W5	51V0
1N5262B	D21
0W5	51V0
1N5262B	D20
0W5	51V0
1N5262B	D19
0W5	51V0
1N5262B	D18
0W5	51V0

+249Vdc

C41 10U 450V

R79

1/4W

47K

-37Vdc

	63V
C29	220N
	50V
C61	22U

R78 1/4W	16K
	.
Q4	Q5
MPSA56	MPSA56
5104	5104
TO92	TO92	C30
R76 1/4W 27K	R77 1/4W 27K	C62

22U 50V220N 63V

R80 1/4W 47K

-38Vdc

3700_DRW

R105	1/4W	1K
		C25
		100N	100V
			8

		3682	OUTPUT	XFMR					9
		W17
	Val							OUTPUT
	V4:A				T	R	S
			5					J5
		R89
			BLU
R87		1.0W			-	-	-
1/4W	-36 to	220R		2
820R		FLMP
	-38Vdc			GRN	3682			3682	10
			RED		W15			W14
-37Vdc	R91	10R 1.0W FLMP
			4
			T1
			1324M	1

-38Vdc		R92	10R 1.0W FLMP		BLK
					3
					BRN				EXTENSION
	-36 to
						T	R	S	J6	11
R86	-38Vdc
1/4W				R90		-	-	-
820R				1.0W
				220R
				FLMP
	V5:A		OUTPUT
	Val			3682
			W18
										12
										13
					M613 REVISION HISTORY
		MODEL(S):-		YCV50
		#	DATE	VER#	DESCRIPTION OF CHANGE
		1	SEPT-23-2004	1.00	GT:DERIVED FROM M581 V11.00
		2	OCT-15-2004	2.00	GT: PC#6748 R101 -> 2K2 (4847), R55 -> 4K7 (4827), D24 ->
		3 .		.	20V0 (6465), ADD R104: 150K/2W (4790)					14
		4 .		.	Increased route cutaway on preamp board
		5 .		.	R53->3K9 (4850), R62->270K (4879), C19->100N (5865)
		6	DEC-02-2004	.	GT:PC#6776 MOVED TOP MULTIPLE TO ADD ZIPPER
		7	MAR-04-2005	2.10	GT:PC#6836:R78 27K #4833 --> 18K7 #5021 for bias
		8	APR-26-2005	2.20	GT:PC#6865:STDBY FIX, ADDED #4599 x 3 AND #5299 x 1
		9 .		.	GT:PC#6889: X61 #4599 --> 1K #4823 RESISTOR
		10 MAY-27-2005		3.00	GT:PC#6886:ADD #4520 TRIMPOT 10K, R78->#4876 16R
		11 .		.	AH: Moved some parts, Autoinsert needs more space
		12 .		.	PC#6937, MODIFY TUBE SOCKET ROUTING AND DRILLING
		13 .		.	PC#6965, MOVE ARC TRACE AWAY FROM TUBES					15
		1 .		.	PC#6967, INCREASE CLEARANCS NEAR OUTPUT TUBES
		2	NOV-25-2005	.	PC#7041:GT:UPDATED BIAS NOTE FOR R91&R92
		3	DEC-14-2005	3.01	PC#7053:GT:R53 4850 3K9->4864 2K7, NEW BIAS FOR CE
		4 .		4.00	BALVINDER CORRECTED TESTNODE PADS
		5 .		.	SPACED W8 TRACE 6MM FROM SCREW HOLE
		6 .		.	UPDATED K1,K2 FOR CLINCH
		7	MAY-17-2006	.	PC#7125:GT:CHANGE #3914 RCA JACK TO #6541.
		8 .		.	PC#7091:ENLARGE HOLE SIZE FOR #3522 KINK LEADS (S3
		9 .		.	TO S6)
		10	D	V	N					16
		11	D	V	N
		12	D	V	N
		13	D	V	N
					Product YCV50
					TUBE GUITAR AMP	PCB# M613			Sheet 1 of 2	17
					Date: Mon Sep 11, 2006			Rev:4V00
					Filename: M613-4V00sch.sch2002

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