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A
B
C
1
.
J6
18AWG
BLK
+267V
W26
PRE2
2
R40
1/4W
47K
.
.
J1
C70
100N
100V
3
R3
1M
.
10P
C2
R4
100V
1/4W
47K
.
16AWG
GND
GRN
W30
4
GND
+15V
.
BC550C
J4
Q3
5
5101
R97
C17
TO92
1/4W
50V
22U
10K
.
R27
4K7
.
-15V
6
M648 PCB HISTORY
MODEL(S):-
YBA200
#
DATE
VER#
DESCRIPTION OF CHANGE
7
1
22 Sept, 2003
1.00p1
2nd Proto
2
9 Jan, 2004
v1.00
fixed heatsink and made value changes
3
10-MAR-2004
V2.00
CHNGD SKRN - EYELET # SAME ON BOTH SIDE OF WIRES
4
CHNGD SKRN - TUBES NOW HAVE 'V' DESIGNATION
5
16-MAR-2004
V2.00
PC#6672 - Change D20 from 20V0 to 27V0 zener (6426)
6
PC#6672 - Corrected colour labels on LD1 & LD2
7
22-MAR-2004
V2.00
PC#6672 - Apply masking to mount pins of S7
8
30-MAR-2004
V2.00
PC#6673 R120 CHANGED 470R-->470K (#4821-->4843)
9
.
.
Added extra breakaways
10
19-APR-2004 V3.00 PC#6680 Add header to ribbon & tabs to ease wiring and allow
8
11
for double insulated wire on STDBY and HV from power board
12
to preamp. Modified STDBY switching.
13
4 May, 2004
v3.01
Updated net classes and class to class rules for hi-voltage.
1
25-MAY-2004
V4.00
PC#6687 Replace D5-8 IN5408->UF5408 (HER508)
2
.
.
Removed copper pours on sockets and force updated
3
07-JUN-2004
V4.10
PC#6688 - Replaced 100R 5W R56 with
4
.
.
33R 5W #4704 wirewound
5
10-JUN-2004
V4.11
PC#6692 - Moved VCD hole 1.5" to left and bottom left
6
.
.
ETCH GUIDE. PC#6693 - Added RTV holes to
7
.
.
all large capacitors (C32-C33, C24-C27, C52-53,
9
8
.
.
C38, C72, C58, C61-C62 and AC Caps C22-C23)
9
20-OCT-2004
.
Updated z352 - new mounting hole sizes
10
27-OCT-2005 V5.00 AH, PC#6894, 6897 AND 6937
11
23-JUN-2006
V5.10
AH, PC#7118, REMOVE ROUTE CAUSE CUTTING R68
12
.
.
PC#7108, MOVE SILPAD UNDER 7915 INSTEAD 7815
13
28-AUG-2007
V6.00
PC#7262; cleared overriden DRC errors
1
18-SEP-2007
V6.10
FORCE UPDATED FOR NEW PADS, CHANGED TO MOLEX
2
.
.
CONNECTOR FOR FAN, MODIFIED INSERTION FILES
3
17-JUL-2008
V7.00
PC#7628, ADD #4056 FAN SOCKET AND REMOVE MOLEX
10
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
11
A
B
C
All manuals and user guides at all-guides.com
D
E
F
C66
+267V
10N
100V
R111
1/4W
100V
1M
C68
1N
R7
.
113K
680P
C55
R1
.
500K
400V
113K
15A
.
4425
R5
C3
1/4W
P1:A
C5
10N
250V
47K
M
GAIN
100N
50V
PreAmp
.
PreAmp
Val
C64
Val
100N
V1:A
V1:B
2X_TRIODE_HCT
2X_TRIODE_HCT
R114
{Body}
10K
{Body}
.
4U7
R2
220N
1K54
C1
150N
R109
R6
R112
1M
750R
C4
.
63V
68K
C69
.
.
63V
.
63V
+15V
R110
2K
R117
.
1/4W
2M2
.
MUTE
100N
LD3
C16
RED
100V
5906
BRIGHT
Alternate
Alternate
S8:A
R25
2M2
TUNER MUTE
Alternate
Alternate
TUNER MUTE
3522
.
S2:A
S2:B
3522
3522
R26
47K
.
+380V
+15V
R120
470K
.
1N5262B
D21
51V0
0W5
BC550C
Q10
5101
R118
TO92
3K3
.
MPSA56
E
B C
TO-92
79XX
SPOTP32_DRW
G
I
O
"STYLE_P32"
TO-220
D
E
F
G
H
I
J
C8
R16
10N
250V
1/4W
220K
.
6N8
500K
C35
15A
100V
4425
R12
P2:A
47K
M
SCOOP
.
6N8
C34
100V
R11
R50
C7
1/4W
470K
250V
1N
400V
62K
.
.
R10
120K
.
R8
R51
1/4W
22M
82K
R9
.
.
1/4W
Alternate
SCOOP
SCOOP
Alternate
100K
S1:A
.
S1:B
15N
R17
3522
3522
C6
120K
100V
.
R113
100K
BRIGHT
.
S8:B
3522
16V
100U
C65
R55
R96
500K
470R
470R
15A
.
.
4425
P8:A
OPERATE
M
RESONANCE
STANDBY
LD1
LD2
47N
RED
YEL
C73
6398
6399
100V
R119
1/4W
BC550C
47K
.
R88
Q9
1M
5101
.
R95
TO92
R87
10K
1/4W
.
8K2
R86
.
1/4W
R89
1K2
1M
.
GND
.
C49
BC550C
100N
100V
C50
100N
100V
C
B E
TO-92
GND
R90
78XX
4K7
.
GND
I G
O
TO-220
6882_PC
G
H
I
J
K
L
M
C12
2N2
400V
+267V
100K
100K
1B
1B
PREAMP OUT
4424
4424
C13
Val
22N
P6:A
P5:A
V2:A
M
RANGE
M
TREBLE
2X_TRIODE_HCT
{Body}
R18
C10
1/4W
220N
63V
4K7
.
500K
15A
4425
R15
R13
220K
1K5
P4:A
.
.
M
BASS
C67
4N7
250V
20K
15A
4423
C9
C11
220N
250V
33N
100V
P3:A
MID
M
R14
113K
.
R29
PRE/POST
1/4W
3436
11K
C18
S5:B
.
47P
100V
R30
R32
1/4W
1/4W
470K
100K
.
.
TL072
S5:A
3436
U1:A
PRE/POST
R33
1/4W
18AWG
470K
YEL
.
W31
R91
SPKR+
1/4W
22K
.
C44
+DRIVE
22N
400V
C45
XF_S2
22N
400V
R74
+560V
820R
.
OUTPUT
OUTPUT
TP3
Val
V5:A
R59
R60
5.0W
5.0W
Splitter
1K8
1K8
N111
.
.
Val
R84
R85
{Body}
{Body}
V3:A
113K
113K
PENTODE
PENTODE
R63
R65
.
.
2.0W
2.0W
2X_TRIODE_HCT
-78V
R78
2R
2R
249K
.
{Body}
.
+380V
18AWG
WHT
W27
-BIAS
220P
PRE1
C48
100V
GND
{Body}
2X_TRIODE_HCT
V3:B
R81
R64
Val
R82
R83
249K
2.0W
Splitter
200K
200K
.
2R
.
.
.
PENTODE
PENTODE
{Body}
{Body}
N105
R61
R62
5.0W
5.0W
TP4
V6:A
1K8
1K8
.
.
R77
Val
820R
OUTPUT
OUTPUT
.
TP5
+560V
C46
22N
400V
C47
18AWG
-DRIVE
22N
400V
.
W32
.
*Testpoints Set P9 for 75mV +/- 10mV TP1 - 4 to TP5
K
L
M
N
O
P
NET00037
-
T
400V
+267V
NET00037
.
113K
R22
C14
10N
250V
Gold Gold Gold
R24
C15
PREAMP OUT
1/4W
T
100N
100V
Val
100K
R21
.
V2:B
47K
500K
.
2X_TRIODE_HCT
15A
{Body}
4425
R23
470K
P7:A
R98
.
M
VOLUME
10N
470K
R19
R20
150N
C71
.
1M
1K
C54
100V
.
.
63V
-20dB PAD
R35
3436
1/4W
S4:A
10K
+15V
.
R31
1/4W
TL072
10K
R36
C20
-20dB PAD
.
U1:C
1/8W
22U
50V
3436
249R
S4:B
FLMP
U1:B
-15V
R37
C21
1/8W
R38
22U
50V
R28
R34
249R
100K
1/4W
1/4W
FLMP
.
11K
100K
.
.
C19
47P
100V
R75
S7:B
820R
4/8 Ohm
.
18AWG
3424
YEL
W31.
Val
TP2
V4:A
SPKR+
N112
3682
PLT
BLUE
W13
R79
249K
3
.
3682
8ohm
.
YEL
W15
4
PWR1
Part#
3682
B+
3682
4ohm
RED
W12
GRN
W16
2
C39
5
160V
10U
{Description}
{Hz}
6
1
R66
R80
2.0W
249K
2R
.
.
3682
PLT
3682
0V
BRN
W14
BLK
W17
18AWG
TP1
V7:A
BLK
W32.
Val
R76
820R
SPKR-
.
Product
Product
YBA200-2
YBA200-2
.
.
PCB#
PCB#
M648
M648
Date:
Date:
Fri May 07, 2010
Fri May 07, 2010
Rev:
Rev:
Filename:
Filename:
M648V08sch.sch2002
M648V08sch.sch2002
N
O
P
Q
-
-
R
S
J2
PREAM
AMP IN
GND
R
S
J3
GND
GND LIFT
3436
S3:B
S3:A
3436
GND LIFT
DI OUT
J5
3923
R39
100K
.
16AWG
GRN
W30.
GND
S7:A
4/8 O
3424
XF_PCT
J7_:A
FUNCTIO
SPEAKON 4
6956
1+
2
1_
2+
SPEAKON 4
FUNCTIO
J7_:B
OU
T
R
S
J8
-
-
-
OU
T
R
S
J7
-
-
-
Sheet
Sheet
1
1
V08
V08
Q
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