Page 1
Page 2
Page 3
Page 4
7654321
8
D
C
B
A
JK1
PHONE 6. 3 - 1
R20
33K
VR0:1
B100K
R8
CN3-1
4K7
VR6: 1
W50KCC
-VCC
+VCC
CN3-2
CN3-3
CN3-4
CN3-6
CN3-7
47UF
C18
RS4A
10K
RS4B
10K
102
+VCC
R6
1K
+VCC
-VCC
D4
1N41 48
C19
R35
103
-VCC
C5
220
2
3
1K
47UF
PRE
C31
IC2:1
LM833
8 4
Q4
BC560C
RS4C
10K
SW6
+VCC
LD1:1
-VCC
+VCC
CN1B
1
R42
1M
RET
rel2
R59
22K
R58
100K
84
R4
IC1:2
TL072
VR4: 1
W50KCC
C3
47K
7
47UF
100K
C14
223
RS2A
10K
C15
RS2B
10K
1
CHASSIS
3
2
OPT01
R3
MPY 7P
VR1: 1
B100K
VR5: 1
W50KCC
-VCC
R27
1K
Q2
BC560C
334
RS2C
10K
+VCC
C119
104
R135
1M
SW8:1
RS3A
RS3B
10K
C4
47UF
1
IC1:1
R7
TL072
47K
R5
4K7
C16
R31
682
1K
10K
Q3
BC560C
C17
104
RS3C
10K
6
C1
R2
5
10K
R1
100N
1M
C2
100P
VR3:1
W50KCC
R19
100K
C12
683
RS1A
10k
RS1B
10K
C28
47UF
C29
47UF
NO TES: UN LESS O THER WI SE S PEC IF IED
1. ALL RS I STOR S V A LU E AR IN OH M S 1/ 8 W
2.ALL CAPACITIORS VLUE ARE IN UF
THIS SYM B OL ALERTS YO U TO IMPO RTA NT OPERA TIN G
3.
AND M A INTENA NC E I NS TRU CTI ONS IN THE A CC OM PA NY ING LITE RA TUR E.
1 2 3 4 5 6 78
-VCC
R23
1K
Q1
BC560C
C13
474
RS1C
10K
+VCC
84
3
:1
2
-VCC
R9
47K
C20
334
RS5A
10K
RS5B
10K
Q10
BC560C
D1
1N41 48
R11
220K
R12
220K
R14
22K
6
5
R13
4K7
R43
4M7
C22
222
R41
15K
C32
47UF
R64
1K
R65
1K
R66
1K
rel2:2C30
rel2:1
IC3:2
072D
+VCC
R45
2K2
100K
C10
7
47UF
R16
47K
LD2:1
R0
2K2
SW4
2
3
R63
VR2
R15
B10K
2K2
SW2
CONT ON
SW2
R46
100K
IC3:1
LM833
C23
1
47UF
+VCC
8 4
C6
47UF
C8
221
R10
C9
100K
104
C7
473
+VCC
R44
LD2:1
2K2
SW3
-VCC
R39
1K
Q5
BC560C
C21
334
RS5C
10K
+VCC
R62
22K
EF7
BF245
R61
1M
D5
R60
1N41 48
22K
R47
2K2
R48
2K2
JK3
RETURN
PHONE 6. 3 -1
JK4
SEND
PHONE 6. 3 -1
JK5
TUNE OUT
PHONE 6. 3 - 1
JK6
LI NE OUT
D2
1N41 48
C11
47UF
6
5
R75
47K5
R49
33K
R76
22K1
VR7: 1
B100K
BC548C
Q6
R17
2K2
C24
470
IC4:2
LM833
R18
2K2
+VCC
-VCC
7
LD4:2
+VCC
R78
22K
R77
22K
C60
2U2
CN3-5
CN4-2
CN4-3
CN4-4
CN4-5
CN4-1
Q7
BC557C
R79
2K2
+VCC
C25
47UF
6
5
R50
220R
R80
22K
CN1A
IC5:2
TL072
Q8
BC548C
R67
22K
LD-OPT01:2
BC557C
R81
2K2
D3
1N41 48
-VCC
CN2A
R52
220R
R51
47K
R68
7
2
22K
3
Title
Number Re visio nSize
A3
Da t e : 5- Jul - 2 00 5 She e t o f
File: D:\WALK\SCH\FE T51A-SCH.DDB Drawn By:
Q9
R82
22K
R83
22K
LD3
C61
2U2
SW5
MUTE
+15V
-15V
C26
47UF
C33
R69
47UF
22K
C34
1
IC5:1
47UF
TL072
8 4
LD3
R84
2K2
R53
1K
R54
1K
R551KR56
1K
LD6
R57
C27
2K2
47UF
JK7
XLR OUT
R72
3
220R
2
R73
220R
R71
47K
+VCC
SW1
COMP ON
Z1
4V7
A
B
C
D
E
JK2
PHONE 6. 3 - 2
+15V
4V7
1
R70
47K
D
C
B
A
Page 5
F1
87654321
POWER SW:1
POWER SW:1
D
C
T1
115V
0V
115V
0V
115V
0V
115V
0V
B
T1
A
R134
R98
121R
R99
15K4
Q14
BF871
IC6:2
TL074
1M
R104
43K
R149
47K5
RV1
R103
U1
7812
3
7815
1
2
R148
47K5
6V8
Z4
6V8
Q18
A13
RS6D
10K
D15
1N4007
rel 1
Q19
A13
D17
1N41 48
CN2B
C59
47U
IRFP240
R105
EF8
332R
R106
332R
Z3
R107
332R
D9
1N41 48
D10
1N4148
R108
332R
R109
332R
C55
470
R110
332R
R111
332R
R112
332R
R113
330R2R
EF10
IRFP240
EF9
IRFP240
R115
R22
R155
R47
EF1
IRF9640
EF2
IRF9640
EF3
IRF9640
EF4
IRF9640
EF5
IRF9640
EF6
IRF9640
RS6C
1
10K
D16
RS6B
1N4148
10K
Q17
BC558
C31
102
R101
120R
Q16
BF872
C71
470
R102
1K
4K75
RR1
1K
NTC10K
Q15
BF871
R100
121R
C54
100U
R116
R22
R156
R47
1N40 07
D20
FAN
R139
47R5
R140
47R5
R141
47R5
-15V+15V
+15V
411
TL074
C70
47U
R117
R22/5W
R157
R158
R159
R47
R47
R47
5W5W5W
IC7:1
R160
R47
5W5W5W
-15V
D11
1N40 07
D12
1N40 07
D18
1N40 07
D19
1N40 07
C69
47U
R150
475R
R151
475R
BR1
DF06M
R162
4R7
C46
104
R152
R1
R153
R1
R154
R1
F3
T630mA
F4
T630mA
U2
7915
2
1
U3
7815
1
2
18V~ 63 0m A
C66
104
C67
104
18V ~ 63 0m A
-15V
3
C63
10U/25V
+15V
3
C62
10U/25V
MAINS
PLUG AC
T6.3AL/125V
200- 240V ~
SHUNT
REL1:1
SPEAKER
500 VA 4O HM
MAINS
PL UG AC
F1
T13AL/125V
100- 12 0V ~
NOTES: U NLESS OTH ER WI SE SPEC IFI ED
1. ALL RS IS TO R S VALU E AR IN OH MS 1/8 W
2. ALL CA PAC ITI OR S V LU E A RE IN U F
THIS S YMB O L ALER TS YO U TO IM PO RTA NT O PER A TIN G
3.
AND MAINTENANCE INSTRUCTIONS IN THE ACCOMPANYING LITERATURE.
Title
Numbe r Re vi sionSize
A3
Date: 9-Jul-2005 Sheet o f
Fi l e : D: \ W AL K \ SC H\ F E T 51 B - SCH. DD B Dra wn B y :
9
10
R144
14
PA IN
T8AL/125V
C48
R88
10K
C50
6800U/100V
1K
F1
R91
1K
C40
221
+15
IC6:4
TL074
D22
1N41 48
D21
1N41 48
1N41 48
D7
1N4148
F2
T8AL/125V
RS8A
100K
RS8B
100K
D6
R92
22K1
R145
8
10K
NTC100 K
1U
D14
1N41 48
9
10
Q11
SA92
R118
3K
C65
R131
100K
8
2
3
103/200V
C41
10U
C44
470
IC6:3
TL074
LD1:1
C43
R97
10K
1N4148
C42
470
10U
2
3
RS6A
7
10K
R147
1K
ROP
D8
R130
R129
10K
27K4
RR2
C53
R132
10K
6
5
R133
6K8
R146
10K
IC7:4
TL074
IC7:2
TL074
1
R93
910R
Q12
SA92
RV2
100R
R96
Q13
475R
SA92
R95
R94
4K75
4K75
U4
C58
101
6800U/100V
C49
RS8C
100K
13
12
C47
CLIP-
CLIP+
PA IN
GND
RS7D
100K
RS8D
100K
+15V
LTV824
RS7A
100K
RS7C
100K
C68
101
R90 10K
R89
10K
C45
10U
R143
1M
IC7:5
TL074
6800U/100V
R120
100R
SHUNT
R121
D
C64
103
C
CLIP-
CLIP+
B
56V ~ 5A
GND
56V ~ 5A
A
1 2 3 4 5 6 78
10K
C51
220U/25V
13
12
R123
1M
RS7B
100K
104/250V
C36
104/250V
C56
4U7
C57
4U7
C35
IC6:5
TL074
BR2
KBPC2508
14
D13
1N41 48
C52
47U
R142
1M
C37
104/250V
104/250V
6800U/100V
+15V
C38
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