Figure 12-35. Uhf (438-470 Mhz) Audio Circuitry Schematic Diagram (8486348Z13-C) - Motorola CP150 Service Manual

UHF (438-470 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486348Z13-C)
C512
6.8pF
R512
150K
R511
100K
2 8
DEMOD
1
3
4
5V_A
U510-1
LM2904
C511
220pF
VHF UHF
R518
220K
2.3 V
R513 Not Placed 100k
R515 Not Placed 0
R516 Not Placed Not Placed
R519 C519
100K 1uF
R517 0 Not Placed
VS_AUDIO_SEL
VS_GAIN_SEL
PWR_SET
VOX
BW_SEL
CH_ACT
SQ_DET
LSIO
HSIO
ASFIC_CS
SPI_CLK
SPI_DATA_OUT
6880309N62-C
150 mV RMS (25 KHz) (Rx)
75 mV RMS (25 KHz) (Rx)
R516
NU
C514
16pF
R514
100K
5V_A
1
5
6
Q520-1
R513
6 8
R515 IMX1
C518
7
0.1uF
5
4
C460
0.1uF
U510-2
C513
LM2904
220pF R521 R520
100K
NU
R517
3V_A
C452
C451
0.1uF
0.1uF
C453
5V_A
4.7uF
C454
0.1uF
C455
.022uF
13 48
GCB2 MICEXT NC
14 47
GCB1 GNDRC
15 46
GCB0 MICINT
16 45
CHACT VDDRC
17 44
SQDET TXSND
18 43
LSIO 30C53 RXRTN
19 42
HSIO U451 AUXTN
20 41
CSX AUDIO
21 40
CLK MOD
22 39
DATA RXSND
23 38
GNDSYN GCB5 NC
24 37
LCAP GCB4
NC
C456 C457
0.1uF 0.1uF
C458
0.1uF
R451
3V 3V_A
47K
114 mV
3V 16_8_MHZ
E451
BK1005HM471
F1200
C459
0.1uF
uP_CLK
5V_B
5V 5V_A
E452
BK1005HM471
5V
E453
BK1005HM471
C497
0.1uF
R523
10K
R522
100K 4
2
3
Q520-2
IMX1
OPT_RX_AUD_SEND_DETECTOR
OPT_RX_AUD_RETURN
OPT_RX_AUD_SEND_UNMUTED
OPT_TX_AUD_FLAT_RETURN
OPT_TX_AUD_SEND
OPT_TX_AUD_RETURN
3V_A
C461
1000pF
3V
R460
24K
C462 C463
0.1uF 0.1uF
C467
R474
1200pF
330
R462
24K
R464 R463
30K 24K
C464
C465 C471
3V_A
0.1uF 1000pF
2.2uF
R476
100K
C472
0.1uF
200 mV RMS
MOD_OUT
A_MOD_OUT
C466
NU
SW_B+
145 mV RMS
15 V
5V_B C499
R487
39pF
0
5V_B
R481
R482
C483
2 8
C481 0.22uF R491 R492
1
.01uF
Not_Placed:NU
3
U480-1 0 24K
4 R484
2.2K
C482
Not_Placed:NU
2 3
C484
.033uF R490
2.2K
Q481 Not_Placed:NU
R485
Not_Placed:NU
Not_Placed:NU 1 3
1
R483
R486
2
Q482
1 6
5V_B 2
3 4 1 6
Q490
R488 UMG5
330K 2
0.15 V (UNSQ)
3 4
R495
C490 5.6K
470pF
U511
UMG5
C498
1uF

Figure 12-35. UHF (438-470 MHz) Audio Circuitry Schematic Diagram (8486348Z13-C)

R470
2.2K
VR471
NC 3V_A
R480
0
R473
R472
1
4 680
680
2 5
D471 R471
C470
0.1uF 2.2K
VR472
3
6 Q472
NC
1
5V
2
C477
0.1uF
R255
3.9K
3
1%
BATT_CHARGE
1 4
D470
R475 L471
180K 390nH
10 mV RMS (Tx)
2 5
R477
2.2K
VR473
NC
MMBZ5250B
6 3
Q470 20V SCI
C474 C473
150pF 150pF
VR474
MMBZ5250B
VR475
NC
MMBZ5245B 20V
15V
C475
.022uF
1
0 V (RX)
R478
2.2K
3 V (TX)
EXT_MIC_PTT 2
C476 C478
.022uF
150pF
J470-1
MICROPHONE CONNECTOR
R479
100K
7.5 V
C493 R494
C494
1000pF 330K
2.2uF
3.5 V (UNSQ)
DC Level 0.3 - 0.4 V low
C488
Supply = 7.42
470pF
1/2 Supply = 3.22
C480 R469
R493 6
0.1uF
10
330K 1
MODE
3 5
INPOS OUTNEG 3.5 V (UNSQ)
2 8
SVR OUTPOS
4
INNEG
C479
7
C489
U490
470pF
150pF TDA8541
C492
R497 R496
10uF
10K
Not_Placed:NU 5V_B
8 6
R499
C496
7
1uF
5
R498 4
D491
U480-2
C495
NC
1uF R489
12-45
RESET
6
BOOT_ENA
4
Q471
OPT_MIC
S2
4
S4
5
S3
6
S1
7
NC
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)(0.5W @ 24 OHMS)
June, 2005