Circuitos De Cc Y De Audio Vhf2 (146-174 Mhz) (Hoja 2 De 2) - Motorola EM200 Serie Manual De Servicio

Esquema eléctrico de la tarjeta de circuito impreso 8488977U01 del radio VHF 1-25 W banda 2 (rev. P8)
C5054
100n
DETECTOR_AUDIO_SEND_OPT_BRD
DNP
UNMUTED_RX_AUDIO_SEND_OPT_BRD
RX_AUDIO_RETURN_OPT_BRD
TX_AUDIO_SEND_OPT_BRD
DNP
R5042
C5051
24.K
100n
TX_AUDIO_RETURN_OPT_BRD
C5050
100n
PA_BIAS
PA_CURRENT
PWR_SET
VOX
C5046
100n
3V
R5084
C5103
0.
100n
USE NLAS4599
DNP IN MARLIN
MAX4599EXT
U515
4 NC
5
COM
6
NO IN 1
DNP
POST_LIMITER_FLAT_TX_AUDIO_RETURN_OPT_BRD
R5024
DNP
C5056
C5101 100.K
100.n
1.n
AUDIO
R5023
100.K
FLAT_TX_AUDIO_INPUT_ACCESS_CONN
C5055
3V 3V
1.u
R5025
100.K
DNP
DNP
R5044 R5063 R5064
24.K 8.2K 8.2K
DNP
C5053
100n
R5040
R5043
24.K 30.K
C5052
100n
3V
C5022
100n
1 36
VDDA TXRTN
2 35
DISC GCB3
3 34
GNDA CLK168
4 33
DACU VDDD
5 32
DACR VDDCP
U504
6 31
DACG GNDD
30C53
7 30
VOX GNDDO
8 29
PLCAP F1200
9 28
SQIN SYN
10 27
UIO VDDSYN
11 26
3V
VDDDAC NC
12 25
SQCAP PLCAP2
DNP
C5028 C5013
C5014 C5023
2.2u 100n 100n 1u
C5059
C5020
22n
100n
DC_POWER_ON
BW_SEL
CH_ACT
SQ_DET
C5024
LSIO
100n
HSIO
ASFIC_CS
SPI_CLK
SPI_MOSI
F1200
C5091 R5026
uP_CLK
82.p
33.K
R5027
U507
270.K
LM2904 8 6
7
5
R5014 4
0.
C5077
1.n
DNP
DNP
9V
C5090
R5068
R5046
82.p
6.2K
24.K
R5045
33.K
U506
LM2904 8 2
C5081 C5033
1
1.n 100n
3
4
3V
C5078
1.n
3V
R5009
DNP
0.
R5067
R5080 C5057
U509
10. 6.2K
100n
MC14053B
R5034 36K 12
X0
C5012
R5032 56.K 13
X1
4.7u 2
Y0
1
Y1
5
Z0
3
Z1
FLAT_OR_DEEMPH_RX_AUD_SEL
3V 3V 5V
9V
R5010
C5075
0.
1n
DNP DNP
3V
R5011
R5088
0. R5059
0. C5031
10.K
DNP
100n
C5034
100n
DNP
C5026 C5029
U507
100n 100n
R5058
LM2904
10.K
DNP 2 8
DNP
1
C5058 3
R5013
4
100n
0.
3V
R5060
10.K
C5025
100n
C5036 R5061
100.n 10.K
R5033
3V
47.K
R5008
0.
R5072
4.7K
C5089 3V
82.p
R5022
100.K
U506 R5056
LM2904 8 6
10.K
7
5
4
9V
R5057
C5032
C5088
10.K 100n
82.p
C5027
100n
100.K
R5021
6
EN
U505
14 6 8
LM2904
X
11 7
A
5
C5044
VAG
4
15 1u C5003
Y
10 R5065
47u
B
6.2K
4
Z
9
C
C5087 120p
R5019 200K
C5048 R5055
100n 10.K
U505
2 8 LM2904
1
3
4
VAG
R5066
1K
C5082
C5076
1.n
1.n
B+
C5049
100n
DNP C5080
U502 C5021
100.n 1.n
R5016 7 TDA1519C
1.M VCC
9 4
INV OUT1
1
NINV
3
FILT_SW_B+
RR
8 6
M_SS OUT2
R5041 C5072 C5073
24.K 1n 1n
C5002
C5097
47u
220.p
R5051
12.K
Q501

Circuitos de CC y de audio VHF2 (146-174 MHz) (hoja 2 de 2)

4-15
C5030 C5079
100n 1.n
RX_AUDIO_OUTPUT_ACCESS_CONN
R5086
560.
R5087
100.K
16.8MHz
MOD_OUT
HANDSET_RX_AUDIO_CH
L501
1019447
SPKR+
SPKR-
L502
1019447
C5098 C5099 C5100
220.p 220.p 220.p
73D02968C63-0
SHEET 7 OF 8