Sennheiser EM 100 G2 Service Manual Page 19

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EM 100 G2, EM 300 G2, EM 500 G2
19/32 08/2004
6 Circuit diagrams
ON/OFF
SELECT
DOWN
UP
+5V
+5Vsw
+6Vsw
+10-15V/50mA
DATA/CLK
100mw max
+10dBu max
-
+
-22...+18dBu
LEVEL_MON
AF-ON
HDX
EXP
TX_BATT
DETECTOR
25KHz
30Hz
5Hz
MUTEDIVERSITY
LP_100KHz
DISCR.LIM.AMP
LIM.AMP
10.7MHz10.7MHzMIXER241MHzMIXER
BPF
230.3MHz
LP_100KHzDISCR.
LIM.AMPLIM.AMP 10.7MHz10.7MHz
230.3MHz
f_IN 241MHz
MIXER241MHzMIXERBPF
EE-EPROM
10.5-16VDC IN
AF-2
AF-1
AF-1
RF-2
RF-1
MONITOR-MODUL
EM500 ONLY
AF-OUT BALANCED
LCD
SUPPLY
UNIT
MAIN
uC
-
+
-
+
-
+
300903Prl1530
PLLVCO
MCK
4MHz
MCK = Main clock
MCK
4MHz
PILOT
DETECTOR
32.768kHz
-6Vsw
-7Vsw
MAIN-BOARD
AF-2
FRONTMODUL
-AF
+AF
+8Vsw
DATA
U100 Y100 U300 Y302 Q304
Q504 Q506 U500
U200 Y200 U400 Y402 Q404 Y404 U400 U400
U700
R460 U402
R360 U302
RF-BOARD
Y304 Q300
U300
U75
U75 U76
U100R79U52
U60 U60
U50 U51
U95 U96
U225
U210
U226
U227
U1
U101
U76 U175 U176
R1
U2
(EM550
from Splitter 1)
(EM550
from Splitter 2)
Block diagram
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