Service manual

August 30, 2002 99R85452E01-O
7-8
VHF Band Information
: Block Diagrams
7.4 Block Diagrams
7.4.1 Complete
Figure 7-2.
SAVE 5V
RX 5V
5V
DAC
RX
Key Pad
Power Input
TX 5V
BATTERY
5V DAC RX DAC TX
35
DTMF IN
RC
NETWORK
9
RC
NETWORK
3
MIC
M101
CN701CN101
27 31
4
15 16 22 25 25
22 15 16
3 4
31
9
35 27
DAC
TX
+ SW B
Ripple
Filter
Q330
5V
SPK
SP701 (1/2)
DTMF
IN
Detect
Detect1313
ANT
Hamonics Filter
C440-445
L415,L416
ANT
Switch
Q409,410
Matching
Network
C446-448,
451,452
L418,419
2-Pole
Band Pass
Filter
Q401
RF
AMP
Q404
2-Pole
Band Pass
Filter
Q405
Mixer
Q407
Coupler
R445
Local
Buffer
Q416
2-Pole
Crystal
Filter
F402
Buffer
AMP
Q414
Pre Driver
Q413
REG
Q206 Q207
Power
Control
Q419
Power
SW
SW201
5V
REG
Q204
SAVE
SW
Q210
TX
REG/SW
Q201 Q202
Over
Voltage Protect
Q707-710
TX/RX
SW
Q208 Q209
VCO
Buffer
Q308
RX
VCO
Q311 Q324
TX
VCO
Q325 Q326
TX/RX
SW
Q309 Q310
Audio
Modulator
Q329
Loop
Filter
Q314-316
Pin 15 16
CN701 Pin37 38 39
Pin 11
Pin 8
10 9
Pin 1
2
TCXO
14.4MHz
X301 Q320 Q322
Sub Audio Modulator
Q322
6 Pole
Ceramic
Filter
F501
IF
AMP
Q408
De-emphasis
Q502A
Sub Audio
LPF
Q505
HPF
Q502
Audio Power
AMP
Q702
EXT Audio
Jack J701
6 Pole
Ceramic
Filter
F502
PLL
Q323
EEPROM
Q114
CPU
Q101
PTT
S102
Mon
S101
LCD
LC101
Shift
Q102
X,tal
8.38MHz
X101
Divide
by 2 Q122
DTMF
Decode
Q120
Reset
Q105
DA
Converter
Q121
CPU
Pin87
DIODE
Q126
CPU
Pin21
CPU Pin22
CPU Pin36
LPF
(DTMF)
Q610A
Limitter
AMP
Q602A
MIC
AMP
Q602B
VOX
AMP
Q610D
ATT
Q608 Q609
LPF
(Sub Audio)
Q610B
N/W
SW
Q601
LPF
Q602C,D
Deviation
Adj
RV601
EXT MIC
Jack
J701(1/2)
DC
AMP
Q125
IF IC Q506
(2nd Mix,2nd Local,IF AMP,DISC,Noise AMP)
2nd Local 44.654MHz
X501
RX SW
Q211
DC/DC
Converter
Q301
Volume
SW201
(VR)
Final
AMP
Q411
PA
Q412