Motorola PRO Elite Serie Manual De Servicio página 101

Tarjeta de circuito de UHF banda 1, esquemas eléctricos y lista de partes
LI_ION
Vdda
R5 Vdda
LVZIF_SEL LVZIF_SEL
DACRx DACRX
DATA DATA
CLK CLK
RECEIVER
DEMOD DEMOD
RSSI RSSI
16.8MHz 16.8MHz
RX_IN RX_INJ
5V
SWB+
R5 5V Vdda SWB+
CSX CSX
MODIN MODIN
DATA
FGU
CLK
LOCK LOCK
16.8MHz
RX_INJ 4V_3.3V TX_INJ
4V_3.3V
UNSWB+ 5V
UNSWB+ 5V
CSX
DATA
TRANSMITTER
CLK
RESET
RESET
RX_IN TX_INJ
UNSWB+
BATT_CODE
F501
S502 24V
SWITCH
1
MECH_SWB+
4 5
B503
1
B504 C502 CR501
VR439
0.47uF 10V
2
3 2 1
R507
0
VOL
C505
6.8V
VR501 100pF
Vdda
PB501
SWITCH
2 1
SB1
VR440
C521
6.8V
.01uF
PB502
SWITCH
2 1
SB2
VR441
C522
6.8V
.01uF
PB503
SWITCH
2 1
SB3
VR442
C523
6.8V
.01uF
PB504
SWITCH
2 1
PTT EMER
VR444
6.8V
Vdda
SWB+
R505
Q502
IMX1 10K
4 1
2 5
RED_LED
Q505
3 6
R501 R502
680 180
CR503
1 3
2 4
S501
SWITCH
RTA3
1 PC0
RTA0
2
PC1
4 8
PC2
PC3
RTA1
C0
C0
C1 C1
RTA2
GND GND1
7 9
C511 C512 C513 C514
100pF 100pF 100pF 100pF
Figura 7-3. Diagrama esquemático de controles y conmutadores (UHF)
B501
L505
BATTERY_CONTACT
390nH
RADIO_CODE
2 DATA
1 NEG
BATT +
3 POS
CONN_J
BATT —
2
VR506
C503
6.8V
100pF
PB505
SWITCH
2 1
C520
VR443
.01uF
6.8V
R506
47K
GREEN_LED
7-3