SEE LAYOUT DIAGRAM
PRODUCTION NOTES
1. BEND THE SUPPORT LEADS ON THE FOUR
POWER TUBE SOCKETS AFTER INSERTION.
2. USE SOLDER JIG FOR WAVESOLDERING.
3. WHEN REQUIRED, A #6956 SPEAKON WILL FITIN THE SPACE OF J7.
4. ENSURE R56 IS #4704 WIREWOUND.
5. MOVE SILPAD TO BE UNDER #6871 INSTEAD #6872
I
O
G
78XX
TO-220
G
O
I
79XX
TO-220
E
C
B
TO-92
MPSA56
P
1
4
G2
8
5
NC
H
H
3
K
6
G1
2
NC
7
G3
6550WE
C
E
B
TO-92
BC550C
KNOB
PART#
FUNCTION
REF
MODEL(S):-
P32
N
N
N
N
8430
K
K
K
K
4425
P
P
P
P
RESONANCE
F
F
F
F
P8
R
R
R
R
YBA200
M648
P1
P2
P3
P4
P5
P6
P7
GAIN
SCOOP
MID
BASS
TREBLE
RANGE
VOLUME
4425
4424
4424
4425
4423
4425
4425
8430
8430
8430
8430
8430
8430
8430
TYPE
P32
P32
P32
P32
P32
P32
P32
"STYLE_P32"
2G
2K
1
9
1K
1G
4
H
6
2
3
H
8
7
2P
5
HT
1P
12AX7A
13
12
11
10
9
DESCRIPTION OF CHANGE
5
4
3
2
1
#
VER#
DATE
MODEL(S):-
8
7
6
D
D
V
V
V
V
D
D
N
N
N
N
YBA200
M648 DRILL HISTORY
25-FEB-04
V01
30-MAR-2004 V02
Extra breakaways added
20-APR-2004 V03
C31 moved, some eyelets chg. to tabs, header added to W19
.
5 May, 2004
.
V3.01 Update octal sockets to ensure routed hole is sectioned.
Added copper pours to octal socket pads.
.
.
Added route slots to provide high-voltage clearance.
25-MAY-2004 V04
Sockets now have slots
10-JUN-2004 V06
PC#6692 AND PC#6693 SEE PCB HISTORY BOX
27-OCT-2005
PC#6894,6897 AND 6937 SEE PCB HISTORY TABLE
V07
4
1
6
5
3
#
2
MODEL(S):-
PC#
*PLACE IMPLEMENTED CHANGES INTO BOARD HISTORY
PENDING CHANGE
X
X
X
X
X
PC
PC
PC
PC
PC
M648 PENDING CHANGES
YBA200
PC
X
13
12
11
10
9
DESCRIPTION OF CHANGE
5
4
3
2
1
#
VER#
DATE
MODEL(S):-
8
7
6
19-APR-2004 V3.00 PC#6680 Add header to ribbon & tabs to ease wiring and allow
for double insulated wire on STDBY and HV from power board
to preamp. Modified STDBY switching.
YBA200
22 Sept, 2003 1.00p1 2nd Proto
9 Jan, 2004
v1.00
fixed heatsink and made value changes
M648 PCB HISTORY
10-MAR-2004 V2.00 CHNGD SKRN - EYELET # SAME ON BOTH SIDE OF WIRES
.
.
CHNGD SKRN - TUBES NOW HAVE 'V' DESIGNATION
16-MAR-2004
.
.
V2.00 PC#6672 - Change D20 from 20V0 to 27V0 zener (6426)
PC#6672 - Corrected colour labels on LD1 & LD2
22-MAR-2004 V2.00 PC#6672 - Apply masking to mount pins of S7
30-MAR-2004 V2.00 PC#6673 R120 CHANGED 470R-->470K (#4821-->4843)
.
.
Added extra breakaways
4 May, 2004
v3.01
Updated net classes and class to class rules for hi-voltage.
.
.
.
.
3796 on this
device only.
PCB
2 of 8741
Z352
2 of 3850
2 of 8701
2 of 8832
- to hold z352 in place
12
9
6
3
13
11
10
5
4
8
7
2
1
07-JUN-2004 V4.10
ETCH GUIDE. PC#6693 - Added RTV holes to
PC#6688 - Replaced 100R 5W R56 with
D
10-JUN-2004
V
V4.11
N
PC#6692 - Moved VCD hole 1.5" to left and bottom left
33R 5W #4704 wirewound
all large capacitors (C32-C33, C24-C27, C52-53,
C38, C72, C58, C61-C62 and AC Caps C22-C23)
25-MAY-2004 V4.00 PC#6687 Replace D5-8 IN5408->UF5408 (HER508)
Removed copper pours on sockets and force updated
20-OCT-2004 .
.
.
.
.
.
.
.
.
.
.
Updated z352 - new mounting hole sizes
27-OCT-2005 V5.00 AH, PC#6894, 6897 AND 6937
23-JUN-2006 V5.10 AH, PC#7118, REMOVE ROUTE CAUSE CUTTING R68
.
.
PC#7108, MOVE SILPAD UNDER 7915 INSTEAD 7815
