Sennheiser EM 100 G2 Service Manual Page 21

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EM 100 G2, EM 300 G2, EM 500 G2
21/32 08/2004
3-10p
C5
*
VSS
VIN
VOUT
AS440NM-4.5
U2
1
2
3
M24C64
U620
*
A0
1
A1
2
A2
3
GND
4
SDA
5
SCL
6
WP
7
VDD
8
SN75176
U3
*
RO
1
RE
2
DE
3
DI
4
GND
5
A
6
B
7
VCC
8
MC68HC908LJ24
U1
*
BP3/FP0
1
PTD5/KBI5/T2CLK
2
FP1
3
FP2
4
FP3
5
FP4
6
FP5
7
FP6
8
FP7
9
FP8
10
PTD6/KBI6/SCL
11
PTD7/KBI7/SDA
12
FP9
13
FP10
14
PTE0/FP11
15
PTE1/FP12
16
PTD3/SPSCK/CALOUT
17
PTE2/FP13
18
PTE3/FP14
19
PTE4/FP15
20
PTE5/FP16
21
PTE6/FP17
22
PTE7/FP18
23
PTC0/FP19
24
PTD2/MOSI
25
PTD1/MISO
26
PTC1/FP20
27
PTC2/FP21
28
PTC3/FP22
29
PTC4/FP23
30
IRQ
31
RST
32
PTD0/SS/CALIN
33
PTC5/FP24
34
PTC6/FP25
35
PTC7/FP26
36
PTA0/KBI0
37
PTA1/KBI1
38
PTA2/KBI2
39
PTA3/KBI3
40
PTA4/ADC0
41
PTA5/ADC1
42
PTA6/ADC2
43
PTA7/ADC3
44
PTB6/ADC4
45
PTB7/ADC5
46
VREFH
47
VREFL
48
VDDA
49
VDD
50
VSS
51
OSC1
52
OSC2
53
CGMXFC
54
PTB0/TxD
55
PTB1/RxD
56
PTB2/T1CH0
57
PTB3/T1CH1
58
PTB4/T2CH0
59
PTB5/T2CH1
60
BP0
61
BP1
62
BP2
63
PTD4/KBI4/T1CLK
64
27pJ
C4
1.0uK
C20
*
TS102
L1
MCK
100pJ
C6
100pJ
C1
10uM
C8
10uM
C7
1.0nK
C12
1.0nK
C13
1.0nK
C14
1.0nK
C15
470RJ
R31
10RJ
R35
0.0R
R22
R12
R17
R15
22KJ
R94
22KJ
R92
47KJ
R93
0.0R
R69
1.0MJ
R71
R10
47RJ
R126
47RJ
R127
330KF
R995
*
165KF
R996
*
82.5KF
R997
*
41.2KF
R998
*
10MJ
R38
4MHZ
Y1
*
*
Y3
27pJ
C2
100KJ
R21
10KJ
R72
*
0.0R
R73
0.0R
R74
*
1.0MJ
R70
47KJ
R999
*
RSSI2_LEV
RSSI1_LEV
DEV_L
TXD_EN
VOL_2
VOL_1
/SET
/UP
/DOWN
LCD_D7
/ON-OFF
LCD_D6
LCD_D5
VOL_0
LCD_D3
LCD_D4
LCD_D2
LCD_D1
PLL_CS
LCD_D0
PWR_ON
VOL_/LOW
LCD_/CS1
HI_BOOST
LCD_/CS2
LOW_CUT
LCD_LIGHT
LCD_RS
LCD_RW
LCD_E
BUS_CLK
BUS_DAT
PILOT
ANT_1
/PWR_MUTE
/AF_ON
/MUTE
TX_BATT
RXD
TXD
/RST
/NOISE
/RST
+DATA
-DATA
TXD
RXD
TXD_EN
LCD_CONTRAST
EE_/WP
BUS_CLK
BUS_DAT
/SET
+5VCC
+5VDD
+5VCC
+5VCC +5VSW
+5VCC
+5VCC
1
R1
4
R1
2
R1
3
R1
2
R2
4
R2
1
R2
3
R2
3
R4
4
R3
1
R4
2
R4
2
R3
3
R3
1
R3
4
R7
2
R8
3
R8
1
R8
2
R5
4
R5
3
R5
1
R6
4
R6
2
R6
3
R6
1
R7
3
R7
2
R7
4
R9
1
R9
2
R9
3
R9
3
R11
1
R11
4
R11
2
R11
BZA856A
D40
1
2
3
45
100KJ
R45
100KJ
R46
100KJ
R47
100KJ
R23
100KJ
R20
100KJ
R19
100KJ
R18
4MHz
Y2
*
TP1
TP4
TP5
TP6
TP7
TP2
TP3
TP10
TP12
TP13
TP642
TP643
TP15
TP14
TP16
TP18
TP19
TP21
TP22
TP17
TP23
TP24
TP25
TP30
TP31
TP32
TP33
10KJ
R13
33nK
C10
10nK
C3
12
4
8
U3
EM100/300 = SN75176
EM500 = SP485
*
nm
nm
nm nm
nm
m = mounted
EM500
EM100
VARIANTEN
nm = not mounted
EM300
U1(87224)
nm
mnm
nm
MC68HC908LJ24
MC68HC908LJ24
MC68HC908LJ24
*
U620
R74R72
nmnm
R995 R996 R997 R998
m
m
mnm
nm
nm
Y1 Y2
87187
nm
nm
nm
nm
R999
C20
m
m
nm
m
nm
m
C5
nm
nm
nm
72339
nm
nm
nmm
m
m
Mainboard, circuit diagram, part 2/3
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