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DRAWING NO.
23425
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ECO No. DESCRIPTION OF CHANGE
J:\ECO_wip\01_1101 A85 RANGE PCB FUSES AND DC OFFSET\L911_1.1.DDB - Documents\L911C1_1.1.PRJ
A & R Cambridge Ltd.
Pembroke Avenue
Denny Industrial Centre
Waterbeach
Cambridge CB5 9PB
AP85 third channel - top level
Circuit Diagram
L911C1
J Reckless
4-Jun-2001
INITIALS
Date Printed
1 2Sheet of
Notes:
+
1
~
2
-
4
~
3
BR100
BRGBU8D
0V_PSU
+49V
-49V
TH100
PTH90DEG
+5V_D
0V_D
1011
IC100E
74HC14D
5 6
IC100C
74HC14D
89
IC100D
74HC14D
14
7
IC100G
74HC14D
C100
100N SM
C101
100N SM
R100
1K0 SM
POWER AMP SUPPLY
TP100
TP101
+
C106
10,000u 63V
+
C107
10,000u 63V
C108
100N PC
C109
100N PC
D100
1N4003F
D101
1N4003F
SPKR1 ON
SPKR2 ON
TR100
BD179
TR101
BD179
R105
100R SM
R106
100R SM
R103
220R SM
R104
220R SM
Top+
Top-
SK102A
Bot+
Bot-
SK102B
INPUT
0V_SIG
VIPROT
DCPROT
OUTPUT0V_LS
0V_HF
VPOS
VNEG
L911C2_1
L911C2_1.1.SCH
EMC
1
N
F
SK101
PHONO2G
C105
1N0 SM
0V_SIG
+49V
-49V
0V_HF
0V_LS
0V_LS
RLY101A
RLY SPST SPKR
RLY101B
RLY SPST SPKR
RLY100A
RLY SPST SPKR
RLY100B
RLY SPST SPKR
0V_D
1 2
IC100A
74HC14D
3 4
IC100B
74HC14D
C103
10N SM
C104
10N SM
R101
1K0 SM
R102
1K0 SM
1
2
3
4
SK103
MOLEXPWR4
THERMPROT
VIPROT1
DCPROT1
+49V
0V_D
1213
IC100F
74HC14D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SK100
FFC 14W 2.54MM VER
+5V_D
0V_D
SPKR1 ON
SPKR2 ON
THERMPROT
VIPROT1
DCPROT1
0V_D
+5V_D
+
C102
100U EL
SP100
STAR POINT 8
0V_PSU
0V_SIG
0V_LS 0V_HF
0V_D
PIN 1 TO THE LEFT AS YOU LOOK FROM THE FRONT
R107
2R2 SM
TP102
TP103
TP104
TP105
TP106
TP107
TP108
TP109
TP110
TP114
TP115
TP111
TP112 TP113
TP116
JR 30/1/01 PRODUCTION ISSUE 1.0
PCB
PB
L911PB_1
01_1018
01_1101 JR 4/6/01 DC OFFSET CHANGES 1.1