Motorola CP040 Detailed Service Manual page 183

VHF2 PCB 8486342Z13-C Schematic Diagrams
C512
6.8pF
R512
150K
R511
100K
2 8
DEMOD
1
3
4
5V_A
U510-1
LM2904
C511
220pF
VHF UHF
R518
2.3 V
220K
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
150 mV RMS (25 kHz) (Rx)
75 mv RMS (12.5 kHz) (Rx)
R516
NU
C514
16pF
R514
100K
5V_A
R513
6 8
R515 C518
7
0.1uF
5
4 C460
0.1uF
U510-2
C513 LM2904
R521
220pF
NU
R517
3V_A
C452
C451 0.1uF
0.1uF
C453 5V_A
4.7uF
C454
0.1uF
C455
.022uF
13
GCB2 MICEXT
14
GCB1 GNDRC
15
GCB0 MICINT
16
CHACT VDDRC
17
SQDET TXSND
18
LSIO 30C53 RXRTN
19
U451
HSIO AUXTN
20
CSX AUDIO
21
CLK MOD
22
DAT A RXSND
23
GNDSYN GCB5
24
LCAP GCB4
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
3V_A
C461
1000pF
R460
24K
C462 C463
0.1uF 0.1uF
C467
1200pF
R462
24K
R464 R463
30K 24K
C464 C465
C471
3V_A
0.1uF 1000pF
2.2uF
48
NC
47
46
45
44
43
42
200 mV RMS
41
40
MOD_OUT
39
A_MOD_OUT
38
NC
37
C466
NU
16_8_MHZ
F1200
145 mV RMS
uP_CLK 1.5 V
5V_B R487
0
5V_B
R481
R482
C483
2 8
0.22uF
C481
1
3
4 U480-1 R484
C482
2 3
C484
Q481
R485
3
1
1
R483
R486
2
Q482
1 6
5V_B 2
3 4 1
Q490
R488 UMG5
2
330K
3
C490
470pF
U511
UMG5
3 V (UNSQ)
R470
2.2K
VR471
NC
R472
680
1.5 V
D471 R471
C470
2.2K
0.1uF VR472
NC
3V
5V
R474 R255
330 3.9K
1%
BATT_CHARGE
1 4
D470
R475 L471
180K 390nH
2 5
R476 R477
100K 2.2K
VR473
NC
MMBZ5250B
6 3
Q470
C472 C474 C473 20V
0.1uF 150pF 150pF
VR475
NC
MMBZ5245B
15V
C475
.022uF
R478
0 V (Rx)
2.2K
EXT_MIC_PTT
3 V (Tx)
C476
.022uF
R479
100K
7.5 V
SW_B+
C493 R494
C494
1000pF 330K
2.2uF
DC Level 0.3 - 0.4 V low
C499
C488
39pF Supply = 7.42
470pF
1/2 Supply = 3.22 C480
6
R493
0.1uF
330K 1
MODE
3 5
INPOS OUTNEG
2 8
R491 R492 SVR OUTPOS
4
INNEG
0 24K
C479
7
C489
U490
470pF
150pF TDA8541
R490
C492
10uF R497
8
7
R498
4
D491
U480-2
C495
6 NC
1uF
4
R495
5.6K
0.15 V (UNSQ)
C498
1uF
VHF2 (146-174 MHz) Audio Circuitry Schematic Diagram
3-15
3V_A
R480
0
R473
1 4
680
2 5
3
6 Q472
RESET
1 6
2
C477
0.1uF
BOOT_ENA
3 4
Q471
OPT_MIC
10 mV RMS (Tx)
S2
4
S4
5
SCI
S3
6
S1
VR474 7
NC
MMBZ5250B
M2
20V
2
M3
3
M1
1
1 J471
ACCESSORY CONNECTOR
2
C478
150pF
J470-1
MICROPHONE CONNECTOR
1
2
J491-1
INTERNAL SPEAKER
3 J491-3
4 J491-4
3.5V (UNSQ)
R469
10 3.46 V RMS (Rx)(0.5 W@24 OHMS
3.5V (UNSQ)
R496
5V_B
6
R499
C496
1uF
5
R489