7V5
500mW
D53R
7V5
500mW
D52R
30V
500mW
D35R
30V
500mW
D36R
25V 100n
C36
25V 100n
C39
25V 100n
C40
25V 100n
C53
4uH
L1R
220p
C64
220p
C63
220p
C68
220p
C67
82K5
R26R
1K5
R79R
82K5
R23R
82K5
R27R
82K5
R24R
47R
R74R
47R
R75R
390R
R63R
475R
R46R
475R
R50R
10R
R83
1M
R85
10R
R86
1R
R125R
37K90
R32R
3K160
R33R
47R
R30R
4K590
R34R
1K
R29R
1K0_1%
R28R
324R0
R35R
390K
R89
390R
R62R
7K5
R131R
1K54
R90
9K760
R95
1K54
R92
9K760
R94
9K760
R93
9K760
R91
100K
R96R
10K0
R98
10K0
R99
1M
R101
1K54
R102
9K760
R108
1K54
R104
9K760
R106
9K760
R105
9K760
R103
220K
R109
220K
R112
100R
R67R
100K
R96L
82K5
R24L
82K5
R27L
82K5
R23L
82K5
R26L
1R
R129R
15n
C19R
100p
C20R
220p
C66
220p
C65
220p
C70
220p
C69
180p
C18R
27p
C73R
27p
C74R
27p
C74L
27p
C73L
1/2
MC33078
U2AR
6
5
7
1/2
MC33078
U2BR
2
3
1
1/2
MC33078
U2AR
2
3
1
(4=V-,8=V+)
1/2
MC33078P
U6
6
5
7
1/2
MC33078
U2BR
6
5
7
(4=V-,8=V+)
1/2
MC33078P
U8
2
3
1
(4=V-,8=V+)
1/2
MC33078P
U7
6
5
7
(4=V-,8=V+)
1/2
MC33078P
U8
6
5
7
1/2
MC33078
U6
2
3
1
1/2
MC33078
U7
2
3
1
1/2
MC33078
U1L
2
3
1
1/2
MC33078
U1R
6
5
7
47K
R76R
33K
R77
47K
R78R
475R
R38R
5900
R80R
33R
R11R
6190
R45R
6190
R49R
562R
R47R
562R
R48R
2K32
R37R
2K
R31R
5K9
R81R
5K9
R82R
33K
R84
33K
R58R
82K5
R87
47K
R88
7K5
R132R
82K5
R100
5K9
R107R
47K
R111
47K
R117
100K
R115
2K
R31L
43K
R128R
8K2
R127R
6K19
R133R
2K43
R124R
75R
R130R
75R
R126R
4M7
R113
4M7
R110
8K25
R73R
8K25
R71R
2M2
R118
2M2
R116
47K
R114
10R
R135L
10R
R135R
10R
R134R
100K
R136R
10R
R134L
16V/1W
BZX79
D40R
16V/1W
BZX79
D41R
25V
10n
C30R
25V
10n
C29R
100V
47n
C33R
22n
C71
910R
10W
R42R
910R
10W
R39R
25V
33n
C49L
100V
100n
C37R
100V
100n
C38R
16V
100n
C45R
16V
100n
C46R
16V
100n
C47R
16V
100n
C48R
25V
33n
C49R
25V
100n
C50
25V
100n
C51
25V
100n
C52
4148
D46R
4148
D45R
4148
D47R
4148
D49R
VH-
WC1
PS_GND
WC2R
VH+
WC3
ROG
WC4
LOG
WC5
A_OUT
WC6
B_OUT
WC7
PS_GND
WC2L
D28
D33
D32
D44R
D43R
D5
330u
100V
C54R
330u
100V
C55R
2u2
16V
C35
2u2
16V
C34
2N5638
Q29R
2N5638
Q29L
U10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
4K7
0.5W
R36R
7R5
0.5W
R70R
7R5
0.5W
R69R
442R
0.5W
R41R
442R
0.5W
R44R
S
R
T
LIN_PH
NO_GOLD
JB3 1
2
3
4
5
6
S
R
T
RIN_PH
NO_GOLD
JB4 1
2
3
4
5
6
BAV21
D21R
BAV21
D13R
D10R
D9R
D11R
D16R
4148
D29
4148
D30
BAT85
D12R
BAT85
D15R
D42R
BAT85
D50R
D51R
10K
R119
10K
R120
0R1
5W
R121R
0R1
5W
R54R
0R1
5W
R52R
0R1
5W
R122R
0R1
5W
R51R
0R1
5W
R123R
MJL21193
Q15R
MJL1302A
Q10R
MJL21193
Q13R
MJL21193
Q23R
BC560
Q9R
BC560
Q33R
BC550
Q20
BC550
Q8R
BC550
Q7R
BC550
Q32R
BC550
Q34R
MJL21194
Q21R
MJL21194
Q14R
MJL3281A
Q22R
MJL21194
Q12R
4V7
1N750A
ZD9R
4V7
IN5257A
ZD8R
A63
Q24R
A13
Q25R
470u
25V
C25R
470u
25V
C26R
CW
LIN
100R
RT1R
OUT
IN
SW3
4
5
6
OUT
IN
GND_LIFT
SW3
1
2
3
OUT
IN
LIMITER
SW1
4
5
6
MT1
MT2
G
MAC15A6FP
Q18R
1R8
5W
R57R
DIAC
MBS4991
8V
Q19R
MC1
1
2
3
4
5
6
7
8
WC8
WC9
16v
10u
C57R
2V5
NJM431
D27R
1
23
16v 330n
C59
16v 330n
C60
16v 330n
C61
16v 330n
C62
OPTOLED
U3R
1
2
OPTOLED
U4R
1
2
BC560
Q30R
X1
X2
X3
X4
M
COM
L
R
MONO-STEREO-BRIDGE
S3
13
14
15
16
M
COM
L
R
S3
5
6
7
8
M
COM
L
R
S3
1
2
3
4
MJL21193
MJL21194
E
C
B
MJL1302A
MJL3281A
E
C
B
500mW
16v
D34
NUTRIX
LIN_XLR
JB5
1
3
2
NUTRIX
RIN_XLR
JB6
1
3
2
33n
16v
C41
33n
16v
C42
33n
16v
C43
33n
16v
C44
33u
16V
C56
33u
16V
C58
33U
16V
C17R
33u
16V
C72L
33u
16V
C72R
TP1
TP2
TP3
TP4R
TP5R
TP6
TP7
MR854
D20R
MR854
D19R
1N4004
D38R
1N4004
D39R
BC550
Q31R
-
-
+
+
2
1
BRIDGE
SPEAKON JB1
1
2
3
4
-
-
+
+
2
1
B_OUT
SPEAKON
JB2
1
2
3
4
4N35
U3R
6
5
4
4N35
U3L
6
5
4
4N35
U4R
6
5
4
OUT
IN
OUT
IN
475R
R140R
475R
R137R
475R
R139R 475R
R138R
D56R
D57R
D55R
D54R
MPSA13
E B C
MPSA63
PCB#:
YORKVILLE
NAME:
MODELS:
SCH ISSUE:
TITLE:
DATE:
2.50
INPUT/PWR_AMP
MAY/28/2003
M1088.SCH
AP_800
_
M1088
-
BC550C
C B E
BC560C
MPS4991
NC MT1
MT2
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
#
DESCRIPTION OF CHANGE
VER#
DATE
MODEL(S):-
D
AUG/14/96
.
.
.
.
.
JUN/26/95
JUN/21/95
MAY/30/95
2.50
V
2.10
.
.
.
.
.
2.00
1.20
1.10
PC#6609_C54R/C55R_220u->330u
N
PC#5189_C65,C66,C69,C70_27P-->220P
Q23_TO_THE_BASE_OF_Q9
Q21_TO_THE_BASE_OF_Q8_ALSO_FOR_Q15,
D16L/R_ADD_475R_FROM_EMITTER_Q14,
DIODE_IN_SERIES_WITH_D11L/R_AND
C29L/R_C30L/R__47N-->10N--ADD_4148
PC#4848_R50L/R_R46L/R_158R-->475R
DC_VOLTAGES_ADDED_TO_SCHEMATIC
PC#4806__R126R/R130R__47R-->75R
AP-800
M1088.SCH_DATABASE_HISTORY
BT139
G
MT2
MT1
V+
V+
V+
V+
V+
V+
V+
V+
V+
V+
V+
V+
FET_CNTL
FET_CNTL
FET_CNTL
LPOST
PS_GND
PS_GND
A_OUT
RGT_THRM
RSPRE
RSPRE
LCLP
LCLP
LCLP
LFT_THRM
RSIG
RSIG
RSIG
VH+
VH+
VH+
V-
V-
V-
V-
V-
V-
V-
V-
V-
VH-
VH-
VH-
LSPOST
LSPOST
LSPOST
LIMABLE
LIMABLE
KILL
LSPRE
LSPRE
RCLP
RCLP
LVGND
LVGND
LVGND
LVGND
LVGND
LVGND
LVGND
LVGND
LVGND
LVGND
RSPOST
RSPOST
CHASSIS
-BAT
-BAT
-BAT
LREF
LREF
LREF
LREF
LREF
LREF
LREF
LREF
LREF
LREF
+BAT
+BAT
+BAT
+BAT
RREF
RREF
RREF
RREF
RREF
RREF
RREF
RREF
RREF
AMPOUT
AMPOUT
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
ROG
LOG
LOG
LOG
LOG
LOG
LOG
LAST J = J109
LAST U = U10
LAST Q = Q34
LAST D = D57
LAST C = C74
LAST R = R140
RIGHT = B CHANNEL
LEFT = A CHANNEL
V- = ~-16VDC
V+ = ~+16VDC
TEST POINT
ALL UNMARKED DIODES ARE IN4148
NOTES:
NOTES:
ADJUST RT1R FOR
AT 120VAC
IN 4 OHM MODE
WHILE AMP IS
TP4 @ TP5
10mV BETWEEN
M1091
TO
SENSE
CLIP
CHAN AMP
TO LEFT
CIRCUIT
LIMIT SENSING
LONG TERM CURRENT
AMPLIFIER SHUTDOWN CIRCUIT
M1090
12Db/Oct
12Db/Oct
-1dB 6Hz
-1dB 40Hz
-1dB 6Hz
OF U1R
TO PIN 8
OF U1R
TO PIN 4
TO PIN 4 OF U2R
TO PIN 8 OF U2R
TO POWER SUPPLY BOARD
BINDING POSTS
OUTPUT
SPEAKER
-
+
ONLY!
ONLY!
2%
2%
STEREO,MONO: RSIG = RSPOST
LVGND AT THE INPUT JACKS
ISOTHERMAL TO RIGHT HEATSINK
ISOTHERMAL TO LEFT HEATSINK
BOARD
VOLUME CONTROL
BRIDGED: RSIG =
LSPOST
-1dB 40Hz
BALANCED INPUT
FILTER
FILTER SWITCH
FILTER SWITCH
FOURTEEN
1
TO PIN 4 OF MC33078
TO PIN 4 OF MC33078
NOTE:
NOTE:
CABLE HEADER
RREF AND LREF CONNECT TO
CABLE
RIBBON
CONDUCTOR
RIGHT CHAN
LEFT CHAN
BYPASS CAPS
PIN 1
MEASURED @ 120VAC IN 4 OHM MODE
WITH REFERENCE TO GROUND
ALL DC VOLTAGES MEASURED
-15V
-19V
+16V
+0.4V
-16V
+16V
-+< 500mV
+16V
+16V
+16V
+71V
+33V
+1.1V
+0.55V
-0.55V
-1.1V
-33V
+16V
0V
-71V
U:\M1088V25.PRN
