Yorkville Sound YCV50, YS1003 service manual Production Notes

M613 REVISION HISTORY

MODEL(S):- YCV50

# DATE VER# DESCRIPTION OF CHANGE

1SEPT-23-2004 1.00 GT:DERIVED FROM M581 V11.00

2OCT-15-2004 2.00 GT: PC#6748 R101 -> 2K2 (4847), R55 -> 4K7 (4827), D24 ->

3 .		.	20V0 (6465), ADD R104: 150K/2W (4790)
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
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)

SEE LAYOUT DIAGRAM

			M581 DRILL HISTORY
MODEL(S):-		YCV50
#	DATE	VER#	DESCRIPTION OF CHANGE
1	D	V	N
2	D	V	N
3	D	V	N
4	D	V	N
5	D	V	N
6	D	V	N
			M581 PENDING CHANGES
MODEL(S):-		YCV50
#	PC#	PENDING CHANGE
1	PC	X
2	PC	X
3	PC	X
4	PC	X
5	PC	X
6	PC	X
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY

PRODUCTION NOTES

1. RTV MUST BE ADDED TO THE FOLLOWING CAPS	5. R63 #6467: APPLY THERMAL
C1,C16,C19,C17,C70 BETWEEN C84,C28,C60,C15	COMPOUND GENEROUSLY
BETWEEN C49,C50, ADDED TO C15,C7,C8,C3,C9	BETWEEN PART AND HEATSINK
C56,C14,C6,C10,C4,C2 AND C12	6. NA: BIAS 350mV ACROSS R91
2. C53 IS 22N FOR BOTH NORTH AMERICA AND CE	AND 350mV ACROSS R92
3. C3,C7,C6 MUST BE LOW PROFILE PT#5631	CE: BIAS 300mV ACROSS R91
4. C8,C9 MUST BE LOW PROFILE PT#5879	AND 300mV ACROSS R92

10 D		V	N
11 D		V	N
12 D		V	N
13 D		V	N
1	D	V	N
2	D	V	N
3	D	V	N
4	D	V	N
5	D	V	N
6	D	V	N
7	D	V	N
8	D	V	N
9	D	V	N
10	D	V	N
11	D	V	N
12	D	V	N
13	D	V	N

		M613 POT LIST
MODEL(S):-		YCV50 TUBE AMP
REF	FUNCTION		PART#	KNOB	AS OF
P1	DRIVE		#4425	#8430	11/00
P2	TREBLE		#4424	#8430	11/00
P3	BASS		#4425	#8430	11/00
P4	MID		#4423	#8430	11/00
P5	MASTER		#4425	#8430	11/00
P6	MID		#4423	#8430	11/00
P7	BASS		#4425	#8430	11/00
P8	TREBLE		#4424	#8430	11/00
P9	CLEAN VOLUME		#4425	#8430	11/00
P10	MASTER VOLUME		#4423	#8430	23/04
P11	REVERB		#4424	#8430	11/00
.	.		.	.	.

"STYLE_P32"

3796 on this device only.

Z352

LEAD/PIN REFERENCE

IRF830

MJE340

MPSA56		COM1 COM2
MPSA06	BC550C	NC1	NC2
		NO1	NO2

					4N35			NE5532N
			C B E	G2	G1		H		H	3700_DRW
G D S	E C B	E B C							5	1P
				4	5			4		6
TO-220	TO-126	TO-92	TO-92	P 3	6	NC	2K 3			7 1G
				H 2	7	H	2G 2			8 1K
				1	8 K		2P	1		9
				NC	G3					HT

Lots of goop	2 of 8701
on the thermistor.	2 of 3850

2 of 8829

-to hold z352 in place

PCB

2 of 8741