Figure 7-11. Vhf (136-162 Mhz) Audio Circuitry Schematic Diagram (8486769Z02-A) - Motorola CP150 Service Manual

VHF (136-162 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486769Z02-A)
R511
100K
DEMOD
5V_A
C511
220pF
VHF UHF
R518
220K
R513 Not Placed 100k
R515 Not Placed 0
R516 Not Placed Not Placed
R519 C519
100K 1uF
R517 0 Not Placed
6880309N62-C
150 mV RMS (25 kHz) (Rx)
75 mv RMS (12.5 kHz) (Rx)
R516
NU
C512 C514
6.8pF 16pF
R512 R514
150K 100K
5V_A
2 8
R513
1 6 8
R515
C518
3 7
0.1uF
4
5
4 C460
0.1uF
U510-1
LM2904
U510-2
C513 LM2904
220pF R521
2.3 V
R517
VS_AUDIO_SEL
VS_GAIN_SEL
PWR_SET
VOX
3V_A
C452
C451 0.1uF
0.1uF
C453 5V_A
4.7uF
C454
0.1uF
C455
.022uF
BW_SEL
CH_ACT
13
GCB2 MICEXT
14
GCB1 GNDRC
15
SQ_DET GCB0 MICINT
16
CHACT VDDRC
17
SQDET TXSND
18
LSIO LSIO 30C53 RXRTN
19
U451
HSIO AUXTN
20
CSX AUDIO
21
HSIO CLK MOD
22
DATA RXSND
23
GNDSYN GCB5
24
ASFIC_CS LCAP GCB4
SPI_CLK
SPI_DATA_OUT
NC
C456 C457
0.1uF 0.1uF
C458
0.1uF
R451
3V 3V_A
47K
114 mV (RF)
3V
E451
BK1005HM471
C459
0.1uF
5V_B
5V 5V_A
E452
BK1005HM471
5V
E453
BK1005HM471
C497
0.1uF
R523
10K
R522
100K 4
2
3
Q520-2
IMX1
1
5
6
Q520-1
IMX1
OPT_RX_AUD_SEND_DETECTOR
OPT_RX_AUD_RETURN
R520
100K
OPT_RX_AUD_SEND_UNMUTED
OPT_TX_AUD_FLAT_RETURN
OPT_TX_AUD_SEND
OPT_TX_AUD_RETURN
1.5 V
3V_A
C461
4.7uF
3V
R460
24K
C462 C463
0.1uF 0.1uF
C467
1200pF R474
R462 330
24K
R464 R463
30K 24K
C464 C465
C471
3V_A 0.1uF
1000pF 2.2uF
48
NC
47
R476
46
100K
45
44
C472
43
0.1uF
42
200 mV RMS
41
40
MOD_OUT
39
A_MOD_OUT
38
NC
37
C466
NU
16_8_MHZ SW_B+
F1200
145 mV RMS
uP_CLK 1.5 V
C499
5V_B
R487
82pF
0
5V_B
R481
R482
C483
2 8
0.1uF R491 R492
C481
1
.01uF
Not_Placed:NU 3
U480-1 R484 0 24K
4
2.2K
C482 Not_Placed:NU
2 3
C484
.033uF R490
Q481 Not_Placed:NU 2.2K
R485
Not_Placed:NU
Not_Placed:NU 3
1
1
R483
R486
2
Q482
1 6
5V_B
2
3 4 1 6
Q490
R488 UMG5
330K 2
3 4
R495
C490 5.6K
470pF
U511
UMG5
C498
1uF
3 V (UNSQ)

Figure 7-11. VHF (136-162 MHz) Audio Circuitry Schematic Diagram (8486769Z02-A)

R470
2.2K
VR471
NC 3V_A
R480
0
R473
R472
1 4
680 680
2 5
D471 R471
C470
2.2K
0.1uF VR472
3
6 Q472
NC
1 6
5V
2
C477
0.1uF
R255
3.9K
3 4
1%
BATT_CHARGE Q471
1
4 D470
R475 L471
180K 390nH
10 mV RMS (Tx)
2 5
R477
2.2K
VR473
NC
MMBZ5250B
6 3 Q470 SCI
C474 C473 20V
150pF 150pF
VR474
NC
VR475 MMBZ5250B
NC
MMBZ5245B 20V
15V
C475
.022uF
1
R478
0 V (Rx)
2.2K
EXT_MIC_PTT 2
3 V (Tx)
C476 C478
.022uF 150pF
J470-1
MICROPHONE CONNECTOR
R479
100K
7.5 V
C493 R494
C494
1000pF 330K
2.2uF
3.5V (UNSQ)
DC Level 0.3 - 0.4 V low
C488
Supply = 7.42
470pF
1/2 Supply = 3.22
6 C480 R469
R493
0.1uF 10
330K 1
MODE
3 5
3.5V (UNSQ)
INPOS OUTNEG
2 8
SVR OUTPOS
4
INNEG
C479
7
C489
U490
470pF
TDA8541
150pF
C492
10uF R497 R496
10K
Not_Placed:NU 5V_B
8 6
R499
C496
7
1uF
5
R498
4
D491
U480-2
C495
NC
1uF R489
0.15 V (UNSQ)
7-13
RESET
BOOT_ENA
OPT_MIC
S2
4
S4
5
S3
6
S1
7
M2
2
M3
3
M1
1
J471
ACCESSORY CONNECTOR
1
2
J491-1
INTERNAL SPEAKER
3 J491-3
4 J491-4
3.46 V RMS (Rx)(0.5 W@24 OHMS
June, 2005