Figure 12-23. Uhf (438-470 Mhz) Audio Circuitry Schematic Diagram (8486348Z09-A) - Motorola CP150 Service Manual

UHF (438-470 MHz) Schematic Diagrams, Overlays, and Parts Lists (8486348Z09-A)
C512
6.8pF
R512
150K
R511
100K
2 8
DEMOD
3
4
5V_A
U510-1
LM2904
C511
220pF
R518
220K
2.3 V
R519 C519
100K 1uF
VS_AUDIO_SEL
VS_RAC
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 (12.5 kHz) (RX)
R516
NU
C514
16pF
R514
100K
5V_A
3
R513
1 6 8
1
R515
C518 2
7 Q520
100k 0.1uF
5
0
4
C460
U510-2
C513 LM2904 0.1uF
220pF
R521
100K
R517
NU
3V_A
C452
C451 0.1uF
0.1uF
C453
5V_A
0.1uF
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
24 37
LCAP GCB4
NC
C456 C457
0.1uF 0.1uF
C458
0.1uF
R451
3V 3V_A
47K
114 mV (RF)
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
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
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
VS_GAIN_SEL
C466
NU
SW_B+
1.5 V
145 mV RMS
5V_B
R487
0
5V_B C499
R481
100K 82pF
R482
180K
C483
2 8
C481 0.1uF R491 R492
1
.01uF
Not_Placed:NU
3
U480-1 0 24K
4 R484
LM2904 2.2K
C482 Not_Placed:NU
2 .01uF
3
R490
2.2K
R483
C484
Not_Placed:NU
Q481 180K .033uF
Not_Placed:NU 1 Not_Placed:NU
R486
100K
3
1
R485
2
100K
Q482
1
2
3 V (UNSQ)
3
Q490

Figure 12-23. UHF (438-470 MHz) Audio Circuitry Schematic Diagram (8486348Z09-A)

R470
2.2K
VR471
NC 3V_A
R480
0
R472 R473
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 Q471
1
4 D470
R475 L471
180K 390nH
10 mV RMS (TX)
2 5
R477
2.2K
VR473
MMBZ5250B NC
6 3 Q470 SCI
C474 C473 20V
150pF 150pF
VR474
VR475 MMBZ5250B
NC
MMBZ5245B 20V
15V
C475
.022uF
0 V (RX)
1
3 V (TX)
R478
2.2K
EXT_MIC_PTT
2
C476
.022uF
J470-1
MICROPHONE CONNECTOR
R479
100K
7.5 V
C493 R494 C494
1000pF 330K
2.2uF
3.5 V (UNSQ)
C488
6 470pF
1
MODE 3.5 V (UNSQ)
R493 3 5
INPOS OUTNEG
330K 2 8
SVR OUTPOS
4
INNEG
C489
7 470pF
R496
U490 R497
C492
TDA8541 1MEG 10K
2.2uF
Not_Placed:NU 5V_B
8 6
R499
C496
7 270K
1uF
5
R498 4
47K D491
6 U480-2
C495 NC
NC LM2904
1uF
D492
0.15 V (UNSQ)
4
R495
5.6K
C498
1uF
12-29
RESET
6
BOOT_ENA
4
OPT_MIC
S2
4
S4
5
S3
6
S1
7
NC
M2
2
M3
3
M1
1
J471
ACCESSORY CONNECTOR
1
2
J491-2
INTERNAL SPEAKER
3.46 V RMS (RX) (0.5 W @ 24 OHMS)
June, 2005