Block Diagram - Puxing PX-666 Service Manual

1
D
PLL U401
C
LMX2332ATM
SW921
B
TX232
U901
+5V
EM44
PTT
MONI
A
1
2

Block diagram

VCO
D302
T321 T322 T341
D301
+5VC
MOD
D303
T311 +5VR
RET
TCXO
vccn
12.8MHZ
VR421
FL240 CR240
2nd lo
T431
RSSI
AN SQL
FM U240
IF
N/W
TA31136F
+5VR
TX I
+5VT
RX O TX D
RX I AFC
APC DQT
AT X BEEP/QT N/W
ARX N/W
BATT Test
U911
24CO8
+5VT
+5VR
+5VC
POWER
+5V
SB
2
3
AMP AMP DRIVE AMP
T101 T102 T105
+5VT +5VT
BATT
U170
APC
T181
NJM2904V
+5VT T171
T230 FL231 T202 T201
38.850MHZ
+5VR
U601B
T631 T621
T601
+5VT
T641
MIC MUTE
3
FAML AMP
ANT SW LPF
T107
D101
D201
D202
P TX
+5V +5VC
PTT/RXD
+5VR
PTT
U601A
U641
TXD
T811
P AMP BATT
T812
ARX/BEEP
4
D
ANT
C
JK621
MIC
B
SP
JK601
VR641
A
4