8404077G01 - Motorola GP344 Detailed Service Manual

UHF1 Circuit Board and Schematic Diagram
Vdda
R5 Vdda
LVZIF_SEL
DACRx
DATA
CLK
RECEIVER
DEMOD
RSSI
16.8MHz
RX_IN RX_INJ
5V
R5 5V Vdda SWB+
CSX
MODIN
DATA
FGU
CLK
LOCK
16.8MHz
RX_INJ 4V_3.3V TX_INJ
4V_3.3V
UNSWB+ 5V
UNSWB+ 5V
CSX
DATA
TRANSMITTER
CLK
RESET
RX_IN TX_INJ
UNSWB+
BATT_CODE
F501
S502 24V
SWITCH
1
MECH_SWB+
4 5
LI_ION B503
1
B504 C502
CR501 VR439
0.47uF 10V
2
3 2 1
R507
0
VOL
C505
6.8V
VR501 100pF
Vdda
LVZIF_SEL
DACRX
PB501
SWITCH
DATA
2 1
SB1
CLK
VR440
C521
DEMOD .01uF 6.8V
PB502
RSSI
SWITCH
2 1
SB2
VR441
16.8MHz C522
6.8V
.01uF
PB503
SWITCH
2 1
SB3
VR442
C523
6.8V
.01uF
PB504
SWB+
SWITCH
2 1
PTT EMER
VR444
CSX
6.8V
MODIN
Vdda
SWB+
LOCK
R505
Q502
IMX1 10K
4 1
2 5
RED_LED
Q505
3 6
R501 R502
680 180
CR503
1 3
2 4
RESET
S501
SWITCH
RTA3
1 PC0
RTA0
2 PC1
8
4 PC2
RTA1 PC3
C0
C0
C1
C1
RTA2
GND GND1
7 9
C511 C512 C513 C514
100pF 100pF 100pF 100pF
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
UHF1 (403-470MHz) Controls And Switches Schematic Diagram
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8404077G01