SERVICE MANUAL CHANGE NOTICE
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+9V<br />
R101<br />
10K<br />
N1<br />
R102<br />
4.99K<br />
R103<br />
100K<br />
N2<br />
+ C101 + C102<br />
47 X 47 X<br />
10V 10V<br />
+5V<br />
C103<br />
+ R105<br />
R106<br />
AUDIO OUT TO RF<br />
PIN 9 OF U101<br />
1.0 X 100K<br />
49.9K<br />
R104<br />
16V<br />
+9V<br />
100K<br />
I9<br />
MC33179DR2<br />
AUDIO IN I4 R107<br />
N9<br />
24.9K<br />
C104 + C107<br />
P101<br />
P102<br />
C105<br />
4 N5 R110<br />
N14<br />
12<br />
4<br />
C130<br />
+<br />
5<br />
1.0 X<br />
4<br />
N3<br />
N6<br />
150pF<br />
16V<br />
N8<br />
P102 N4<br />
.1 499<br />
C131 C113<br />
U102 C 7<br />
+ C106 U102 A 14<br />
4.7 X16V<br />
P101 150pF 150pF<br />
188A49<br />
1.0 X 188A49<br />
16V R109 10<br />
R111<br />
13<br />
11<br />
249<br />
1<br />
6<br />
N24 402K U102 B 8<br />
P101<br />
+9V TO MIC<br />
+9V N55 N16 R112 N12<br />
N7 C108<br />
188A49<br />
R142 C110<br />
N13 R113 R114<br />
11<br />
P101<br />
+<br />
3 16.5K R115<br />
N15 12 4.7 X<br />
N23 1.0 X16V C111<br />
–<br />
16V 10K 7.5K 9<br />
N10<br />
2.0K<br />
10 + C109<br />
C112<br />
P101<br />
2.0K<br />
N17<br />
R116<br />
R117<br />
2 + 4.7 X<br />
1K<br />
SHIELD I19<br />
CW .0039<br />
24.9K<br />
16V<br />
188A01<br />
330pF<br />
N19<br />
3<br />
R125<br />
1<br />
N18 R118<br />
P102<br />
1 R119<br />
20K LOG TAPER 14<br />
G<br />
N21<br />
10K<br />
P102<br />
+ C116<br />
1K<br />
GAIN<br />
C115<br />
+ C117<br />
4.7 X<br />
N20<br />
U101 A<br />
C118<br />
.0015<br />
C119<br />
1.0 X<br />
P102<br />
16V<br />
+<br />
3<br />
C121<br />
16V 4.7 X 16V +<br />
4.7 X 16V +<br />
C120<br />
15<br />
P102<br />
4.7 X16V<br />
* N25<br />
N26<br />
R122<br />
+5V<br />
R123<br />
R124<br />
R140<br />
N28<br />
75K<br />
1K<br />
1K N27<br />
0<br />
N29<br />
16<br />
9<br />
N51 R126 N30<br />
C123<br />
+9V TO RF I33<br />
+<br />
R127 R128<br />
183A01<br />
1.0 X16V<br />
60.4K<br />
C124<br />
Q103<br />
Q104<br />
P102<br />
2 N33 150pF 183A01<br />
N32<br />
1.5K 1.5K<br />
N54<br />
P102<br />
R129 N34 CW<br />
R141<br />
N35<br />
+9V 10K<br />
20K 10K<br />
183A07<br />
+9V R130<br />
N38<br />
AUDIO<br />
Q105<br />
+5V<br />
+ C125<br />
1.0 X<br />
2 3<br />
1 S101<br />
L101 C126<br />
+<br />
C127<br />
16V<br />
6 55A178 N36<br />
162A03<br />
N39 4.7 X .001<br />
5 4<br />
16V<br />
+9V<br />
L102<br />
R131<br />
N40<br />
4.02K<br />
R132<br />
J101<br />
1.8uH<br />
FUNCTIONAL TEST POINTS:<br />
N41<br />
+ 3.01K<br />
N42<br />
N43 R133<br />
+5V<br />
I47<br />
GREEN<br />
N44<br />
6<br />
+5V TO RF<br />
I4 = AUDIO INPUT<br />
I40<br />
R134<br />
R135<br />
I9 = AUDIO OUT TO RF BOARD<br />
R136 D101<br />
RED<br />
5<br />
13.3K<br />
R137<br />
L103<br />
3.01K<br />
6.19K 49.9K<br />
7<br />
N46<br />
N47 P101<br />
2<br />
I19 = Vcc TO MICROPHONE<br />
D102<br />
N49 100 I33 = Vcc TO RF BOARD<br />
J102<br />
L104<br />
N50<br />
+5V I47 = +5V DC TO RF BOARD<br />
N45 1.8uH<br />
188A01<br />
N52<br />
N53<br />
+9V<br />
I40 = Vcc INPUT (+9V DC)<br />
Q106<br />
Q107<br />
C128<br />
I45<br />
3 I45 = GROUND<br />
183A02<br />
183A02<br />
G<br />
150pF<br />
R138<br />
13<br />
681<br />
R139<br />
U101 B<br />
C129<br />
1K<br />
150pF<br />
4 2<br />
GND<br />
AUDIO<br />
GROUND<br />
1<br />
2<br />
S102<br />
55A178<br />
6<br />
5<br />
3<br />
4<br />
1999, Shure Brothers Inc.<br />
27B1018 (SB)<br />
1<br />
8<br />
T2 Earlier Version Audio Board
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