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DR-610E
Service Manual
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Alinco DR-610E, DR-61OT Service Manual

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DR- 6 1 OT/ E S er v ic e M a nu a l
CONTENTS
• SPECIFICATIONS
1 ) General...........................................2
2) Transmitter........................................2
3) Receiver...........................................2
• CIRCUIT DESCRIPTION
1 ) Receiver System..............................3 - 8
3) PLL Circuit
4) Front CPU and Peripheral Circuit
5) Sub CPU and Peripheral Circuit
6) CTCSS Tone Encoder Circuit
7) Packet Circuit
8) Front CPU I/O Port (IC501 )................15-16
9) Main CPU I/O Port (IC601)
• SEMICONDUCTOR DATA
1) AN8010M
2) BU4094BF
3) L78LR05D.......................................20
4) LA4445...........................................20
5) M56760FP.......................................21
6) M57788MR
7) MC7808..........................................23
8) NJM4066B
9) NJM2902M (T1).................................23
10) NJM4558
11 ) RH5VA60AA
12) nPC1676G.......................................24
13) S-AV17...........................................25
14) TC4S11F
15) TC4S66F
16) TC4W53F........................................26
17) TC9154AP
18) TC95219F
19) TC35305F (TP1).................................29
20) TK10489M.......................................30
21) TK10930VTL
22) Transistor, Diode and LED Outline Drawings... 32
23) LCD
• EXPLODED VIEW
Dv
A L IN C O E L E C T R O N IC S IN C .
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1 ) Front View
2) LCD View
3) VHF Unit View...................................36
4) UHF Unit View...................................37
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.10-11
11 ~ 12
.12 ~ 13
17 ~ 18
33-34
13 14
19
22
24
26 26
27
31
35
• PARTS LIST VHF MAIN Unit
UHF MAIN Unit
VOL Unit..........................................42
FRONT CPU Unit
SUB CPU Unit
VHF VCO Unit....................................45
VHF PLL Unit
9
• ADJUSTMENT
• PC BOARD VIEW
• BLOCK DIAGRAM
• SCHEMATIC DIAGRAM
UHF VCO Unit....................................46
UHF PLL Unit...............................54 - 46
AIR Unit...........................................46
ENC Unit
SP Unit
FAN Unit
Packet
Mechanical Parts................................ 47
PCB...............................................47
Packing...........................................47
EHM35B..........................................47
EHM39...........................................48
1) Required Test Equipment.......................49
2) Adjustment Points..........................50 — 51
3) UHF RX Adjustment.............................52
4) UHF TX Adjustment.............................53
5) VHF RX Adjustment.............................54
6) VHF TX Adjustment
1) VHF MAIN/AIR Unit Side A
2) VHF MAIN/AIR Unit Side B
3) UHF MAIN/ENC/VOL Unit Side A
4) UHF MAIN/ENC/VOL Unit Side B
5) Front CPU Unit Side A
6) Front CPU Unit Side B
7) SUB CPU Unit Side A
8) SUB CPU Unit Side B
9) VHF VCO Unit
10) VHF PLL Unit....................................62
11) UHF VCO Unit...................................62
12) UHF PLL Unit....................................62
1) Main Block Diagram
2) CPU Block Diagram
3) PLL Block Diagram
1) VHF MAIN UNIT
2) UHF MAIN UNIT
3) FRONT CPU UNIT..............................70
4) SUB CPU Unit
5) VHF VCO, PLL Unit
6) UHF VCO, PLL Unit
7) ENC Unit
8) EHM35B
9) EHM39............................................75
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38-40
40-42
44-43
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66-67 68-69
45
47
47
47
55
56 57 58
59 60 60 61 61
63 64 65
71 72 73 74 75
S P E C I F I C A T I O N S
1) General
Frequency Coverage:
Channel steps: Antenna Impedance: Microphone Impedance: Speaker Impedance: Supply Voltage: Dimensions (Body only): Weight:
(Version T) VHF BAND
UHF BAND
(Version E)
VHF BAND
UHF BAND 144.000 ~ 145.995MHz
5, 10, 12.5, 15, 20, 25, 30, 50kHz steps 50Q unbalanced 2kQ unbalanced 8Q unbalanced
13.8 Volts DC 140mm(W) x 40mm(H) x 162mm(D)
1.1kg (approx.)
108.000 ~ 173.995MHz
420.000 ~ 470.000MHz
144.000 ~ 147.995MHz
138.000- 173.995MHz
420.000 ~ 470.000MHz
438.000 ~ 449.995MHz
144.000 ~ 145.995MHz
430.000 ~ 439.995MHz
430.000 ~ 439.995MHz
(RX) (RX) (TX) (RX) (RX) (TX)
(RX/TX) (RX) (RX) (RX/TX)
2) Transmitter
Output Power:
Emission Mode: Modulation System: Max. Frequency Deviation: Spurious Emission:
VHF BAND UHF BAND
High: 50W / Mid: 10W/Low: 5W (approx.)
High: 35W / Mid: 10W / Low: 5W (approx.) F3E (FM), F2E (F2) Reactance Modulation +/ -5kHz not more than -60dB
3) Receiver
Modulation Mode:
Receiving System: Intermediate Frequency:
Sensitivity (12dB SINAD): Selectivity: AF Output:
Specifications are subject to change without notice or obligation. Specifications guaranteed in the amateur band only.
F3E (FM), A3E (AM) Double Superheterodyne
\ /1 i r n
a k ir\
v n r d m i n u
UHF BAND First: 58.3MHz / Second: 455kHz Main band: -16dBp. or better, Sub band: -13dBji or better
-6dB: 12kHz or more, -60dB: 28kHz or less
2.5W or more (5% distortion)
C I R C U I T D E S C R IP T I O N
1. Receiver System
1) Receiver Signal Circuit
T h e r e c e i v e r s i g n a l f r o m t h e a n t e n n a is p a s s e d t h r o u g h t h e d u p l e x e r , t h e c i r c u i t
c o n s i s t i n g o f V H F : L o w - p a s s f i l t e r a n d U H F : h i g h - p a s s f i lte r , a n d t h e s i g n a l is
d i v i d e d i n t o V H F a n d U H F .
w
FL1
455kHz
D7, D8
UHF
D303, D304 Q310
144M Band Receiver Circuit
06
ANT
VHF
ANT
s w
SW
RF
AMP
_ J RF
* AMP
T h e r e c e i v e r s ig n a l p a s s e d t h r o u g h t h e d u p l e x e r is l e d to t h e a n t e n n a s w i t c h ( D 7 ,
D 8 ) . A f t e r p a s s i n g th r o u g h t h e h i g h - p a s s f i l t e r , t h e s i g n a l is a m p l i f i e d b y R F
a m p l i f i e r , . Q 6 . T h e a m p l if ie d s i g n a l is a m p l i f ie d a g a i n b y R F a m p l i f i e r Q 7 , t h e n t h e
u n w a n t e d s i g n a l w ill b e e l i m i n a t e d b y t h e v a r i c a p t u n e d t r i p l e b a n d - p a s s f i lte r .
S e c o n d l y t h e s ig n a l i s m i x e d w i t h t h e s i g n a l f r o m t h e fir s t lo c a l o s c i l l a t o r in t h e f i r s t
m ix e r Q 8 , t h e n c o n v e r t e d i n t o t h e f i r s t I F . Its u n w a n t e d s i g n a l i s a t t e n u a t e d in t h e
c r y s t a l f i l t e r c i r c u i t . A f t e r a m p l i f i e d b y I F a m p l i f i e r Q 2 5 , t h e s i g n a l is l e d t o IC 2
P i n 2 4 .
T h e s i g n a l is m ix e d w i t h t h e s i g n a i f r o m t h e s e c o n d i o c a i o s c i l l a t o r i n I C 2 , t h e n
c o n v e r t e d in t o t h e s e c o n d I F , a n d o u t p u t f r o m P i n 3 . T h e o u t p u t s i g n a l is i n p u t to
t h e I C 2 P in 7 a g a i n a f t e r u n w a n t e d s i g n a l is a t t e n u a t e d b y t h e c e r a m i c f i l t e r . T h e
s i g n a l i s l e d t o t h e lim i t e r a m p l i f i e r I C 2 , a n d d e m o d u l a t e d b y q u a d r a t u r e c ir c u i t in
I C 2 , t h e n t h e s i g n a l is o u t p u t f r o m P i n 1 2 a s t h e A F s i g n a l .
RF
AMP
AIR Band Receiver Circuit
T h e r e c e i v e r s ig n a l p a s s e d t h r o u g h t h e d u p l e x e r is l e d t o t h e a n t e n n a s w i t c h ( D 7 ,
D 8 ) . A f t e r p a s s i n g t h r o u g h t h e h ig h - p a s s f ilt e r , t h e s i g n a l i s a m p l i f i e d b y R F
a m p l i f i e r Q 6 . T h e a m p l if ie d s i g n a l i s le d t o t h e b a n d - p a s s f ilt e r i n A I R F r o n t U n i t ,
a n d a m p l i f i e d b y R F a m p l i f i e r Q 9 0 1 , t h e n o u t p u t f r o m P in 9 .
S e c o n d l y t h e s i g n a l i s m i x e d w i t h t h e s i g n a l fr o m t h e fir s t lo c a l o s c i l l a t o r in t h e f i r s t
3
430M Band Receiver Circuit
m ix e r Q 8 , t h e n c o n v e r t e d i n t o th e f i r s t IF . I t s u n w a n t e d s i g n a l is a t t e n u a t e d b y t h e
c r y s t a l f ilte r c i r c u i t . A f t e r a m p l if ie d b y I F a m p l i f i e r Q 2 5 , t h e s i g n a l i s l e d t o I C 2 ,
P i n 2 4 .
T h e s i g n a l i s m i x e d w ith t h e s i g n a l f r o m t h e s e c o n d lo c a l o s c i l l a t o r i n I C 2 , t h e n
c o n v e r t e d i n t o t h e s e c o n d I F , a n d o u t p u t f r o m P i n 3 . T h e o u t p u t s ig n a l is i n p u t t o
t h e i C 2 P i n 5 a g a i n a f t e r u n w a n t e d s ig n a l is a t t e n u a t e d b y t h e c e r a m i c f ilt e r . T h e n
t h e s e c o n d I F i s d e m o d u l a t e d b y A M d e t e c t o r o f I C 2 , a n d i s o u t p u t fr o m P i n 1 3 a s
t h e A F s ig n a l .
T h e r e c e i v e r s ig n a l p a s s e d t h r o u g h t h e d u p l e x e r i s le d t o t h e a n t e n n a s w itc h
( D 3 0 3 , D 3 0 4 ) . T h e s ig n a l i s a m p l if ie d b y R F a m p l i f i e r Q 3 0 1 . T h e a m p lifie d s i g n a l
is a m p l i f i e d a g a i n b y R F a m p l i f i e r Q 3 1 1 a n d t h e u n w a n t e d f r e q u e n c y b a n d is
e l i m i n a t e d b y t h e h e l ic a l f ilte r L 3 2 2 , t h e n a m p l i f i e d b y t h e R F a m p l if i e r Q 3 1 2 , a n d
a f t e r e l i m i n a t i n g t h e u n w a n t e d f r e q u e n c y b a n d b y t h e h e l i c a l f i l t e r L 3 2 3 , t h e s i g n a l
is m i x e d w it h t h e s ig n a l fr o m t h e fir s t l o c a l o s c i l l a t o r i n t h e f i r s t m i x e r Q 3 1 3 , t h e n
c o n v e r t e d i n t o t h e f i r s t IF . I t s u n w a n t e d s i g n a l is a t t e n u a t e d i n t h e c r y s t a l f i l t e r
c ir c u i t . A f t e r a m p l if ie d b y I F a m p l i f i e r Q 3 2 6 , t h e s ig n a l i s le d t o I C 3 0 2 P i n 2 0 .
T h e s i g n a l i s m ix e d w i t h t h e s ig n a l f r o m t h e s e c o n d l o c a l o s c i l l a t o r in I C 3 0 2 , t h e n
c o n v e r t e d i n t o t h e s e c o n d I F , a n d o u t p u t f r o m P i n 4 . T h e o u t p u t s i g n a l is i n p u t t o
I C 3 0 2 P i n 6 a g a in a f t e r u n w a n t e d s i g n a l i s a t t e n u a t e d b y t h e c e r a m i c filt e r . T h e
s i g n a l i s l e d to t h e l i m i t e r a m p l i f i e r IC 3 G 2 , a n d d e m o d u la t e d b y q u a d r a t u r e d e t e c
t i o n c ir c u i t , t h e n t h e s i g n a l i s o u t p u t f r o m P i n 1 1 a s t h e A F s i g n a l .
144M Band Sub Receiver Circuit
430M Band Sub Receiver Circuit
S (Signal) Meter Circuit
T h e r e c e i v e r s i g n a l f r o m t h e a n t e n n a is le d t o t h e V H F R e c e i v e r . A f t e r a m p l i f i e d
b y R F a m p l i f i e r Q 6 , t h e s ig n a l is i n p u t t o t h e V H F S u b R e c e i v e r . P a s s i n g th r o u g h
t h e h i g h - p a s s f ilte r t o a t t e n u a t e t h e u n w a n t e d s i g n a l , t h e s ig n a l i s a m p l i f i e d b y R F
a m p l i f i e r Q 3 1 5 . T h e a m p l i f i e d s ig n a l i s l e d t o t h e b a n d - p a s s f ilte r t o a t t e n u a t e t h e
u n w a n t e d s i g n a l , t h e n m i x e d w i t h t h e o s c i lla t i n g f r e q u e n c y f r o m U s u b V - V C O in
t h e f i r s t m i x e r Q 3 1 6 , a n d c o n v e r t e d t o th e f i r s t I F o f U H F . T h e f i r s t I F i s le d t o
I C 3 0 2 .
T h e r e c e i v e r s i g n a l f r o m t h e a n t e n n a i s l e d t o t h e U H F R e c e i v e r . A f t e r a m p l i f i e d
b y R F a m p l i f i e r Q 3 1 0 , t h e s ig n a l i s i n p u t t o t h e U H F S u b R e c e i v e r . T h e s i g n a l i s
a m p l i f i e d a g a i n b y t h e R F a m p l i f i e r IC 1 0 a n d le d t o t h e b a n d - p a s s f ilte r to a t t e n u
a t e t h e u n w a n t e d s i g n a l . T h e n t h e s i g n a l i s m i x e d w i t h t h e o s c i lla t i n g f r e q u e n c y
f r o m V s u b U - V C O in t h e f ir s t m i x e r Q 1 0 , a n d c o n v e r t e d t o t h e f i r s t I F o f V H F . T h e
f i r s t IF i s le d t o I C 2 .
VHF:
T h e S m e t e r s ig n a l , D C v o l t a g e o f I C 2 P in 1 6 i s p a s s e d t h r o u g h v a r i a b l e r e g i s t e r
V R 5 . A f t e r a d d e d t o I C 6 0 1 P i n 3 4 , t h e s ig n a l is d i g i t i z e d b y A D c o n v e r t e r a n d
in d i c a t e d o n L C D a s t h e S m e t e r .
UHF:
T h e S m e t e r s i g n a l , D C v o l t a g e o f I C 3 0 2 P in 1 2 i s p a s s e d t h r o u g h v a r ia b l e r e g i s t e r
V R 3 0 4 . A f t e r a d d e d t o I C 6 0 1 P i n 3 1 , t h e s i g n a l i s d i g i t i z e d b y A D c o n v e r t e r a n d
in d i c a t e d o n L C D a s t h e S m e t e r .
RF Attenuator Circuit
AGC (Auto Gain Control) Circuit
2) Squelch Circuit
VHF:
W h e n t h e A T T k e y is p u s h e d , " H " is o u t p u t f r o m t h e S h i f t R e g i s t e r IC 7 P i n 1 4 , t h e n
Q 1 6 is t u r n e d O N t o w o r k t h e R F A t t e n u a t o r C i r c u i t c o n s i s t i n g o f D 2 , D 3 a n d D 4 .
T h e i n p u t s i g n a l p a s s e d t h r o u g h t h e D u p l e x e r , L o w - p a s s f ilt e r a n d A n t e n n a s w i t c h ,
is a t t e n u a t e d a b o u t 1 5 d B b y R F a t t e n u a t o r b e f o r e in p u t to Q 6 t o d e c r e a s e t h e
in t e r f e r e n c e .
UHF:
W h e n t h e A T T k e y is p u s h e d , " H " i s o u t p u t f r o m t h e S h i f t R e g i s t e r I C 3 0 5 P i n 1 1 ,
t h e n Q 3 2 1 a n d Q 3 1 8 a r e t u r n e d O N t o w o r k t h e R F A t t e n u a t o r C i r c u i t c o n s i s t i n g o f
D 3 0 3 a n d D 3 1 3 . T h e i n p u t s i g n a l p a s s e d t h r o u g h th e D u p l e x e r , L o w - p a s s f ilt e r
a n d A n t e n n a s w i t c h , is a t t e n u a t e d a b o u t 1 5 d B b y R F a t t e n u a t o r b e f o r e in p u t t o
Q 3 1 0 t o d e c r e a s e t h e in t e r f e r e n c e .
W h e n t h e in p u t s i g n a l is i n c r e a s e d w h i l e r e c e i v i n g A M , t h e A G C c i r c u i t c o n s i s t i n g
o f Q 2 4 i n c r e a s e s t h e b i a s c u r r e n t a c c o r d i n g t o t h e c l i m b o f t h e D C v o l t a g e fr o m
I C 2 P i n 1 6 t o d e c r e a s e t h e p o w e r g a i n . ( F o r w a r d A G C )
VHF:
T h e A F s ig n a l o u t p u t f r o m I C 2 P i n 1 2 is i n p u t t o P i n 1 9 . O n l y t h e n o i s e i s a m p l i f i e d
b y t h e a c t i v e f i l t e r in ! C 2 , a n d o u t p u t f r o m P i n 2 Q , t h e n a m p l i f i e d b y t h e N o is e
a m p l i f i e r Q 2 7 . T h e a m p l i f i e d n o i s e i s r e c t i f i e d t o D C v o l t a g e b y D 2 0 a n d in p u t t o
P i n 2 1 . T h e in p u t v o l t a g e is d e t e r m i n e d b y t h e a n a lo g u e s w i t c h I C 9 d e p e n d i n g o n
t h e p o s i t i o n o f t h e S q u e l c h v 'R .
In c a s e t h a t S q u e l c h V R i s s e t to M I N , a l l o f t h e a n a l o g u e s w i t c h e s in I C 9 a r e
t u r n e d O N , a n d t h e v o l t a g e o f P in 2 1 d e c r e a s e s . S e c o n d l y t h e v o l t a g e s a r e
c o m p a r e d i n I C 2 . T h e s q u e l c h s i g n a l ( S D V ) f r o m P i n 2 1 b e c o m e s " L " a n d t h e
s q u e l c h o p e n s .
In c a s e t h a t S q u e l c h V R i s s e t t o M A X , a ll o f t h e a n a l o g u e s w it c h e s i n I C 9 a r e
t u r n e d O F F , a n d t h e v o l t a g e o f P i n 2 1 i n c r e a s e s . S e c o n d ly t h e v o l t a g e s a r e
c o m p a r e d i n I C 2 , t h e S q u e l c h s i g n a l ( S D V ) f r o m P i n 2 1 b e c o m e s " H " , a n d t h e
s q u e l c h c l o s e s . IC 8
Q 5 Q 6 Q 7 Q 8
T h e A F s ig n a l o u t p u t f r o m I C 3 0 2 P i n 1 1 i s in p u t t o P i n 1 3 . O n l y t h e n o i s e is a m p li
f i e d b y t h e a c t i v e f i l t e r in I C 2 , a n d o u t p u t f r o m P in 1 4 , t h e n a m p l i f i e d b y t h e N o i s e
a m p l i f i e r Q 3 2 5 . T h e a m p l i f i e d n o i s e i s r e c t i f i e d t o D C v o l t a g e b y D 3 1 5 a n d i n p u t t o
P i n 1 5 . T h e v o l t a g e i s d e t e r m in e d b y t h e a n a l o g u e s w it c h I C 3 0 3 d e p e n d in g o n t h e
p o s it io n o f t h e S q u e l c h V R .
In c a s e t h a t S q u e l c h V R i s s e t t o M I N , a l l o f t h e a n a l o g u e s w i t c h e s a r e t u r n e d O N ,
a n d t h e v o l t a g e o f P i n 1 5 d e c r e a s e s . S e c o n d l y t h e v o l t a g e s a r e c o m p a r e d in I C 2 .
5
T h e S q u e l c h s i g n a l ( S D V ) fr o m P i n 1 6 b e c o m e s " L " a n d t h e s q u e l c h o p e n s .
In c a s e t h a t S q u e l c h V R i s s e t to M A X , a l l o f t h e a n a l o g u e s w i t c h e s i n I C 9 a r e
t u r n e d O F F , a n d t h e v o l t a g e o f P i n 1 5 in c r e a s e s . S e c o n d l y t h e v o l t a g e a r e c o m
p a r e d i n I C 2 , t h e S q u e l c h s i g n a l ( S D V ) f r o m P i n 2 1 b e c o m e s " H " , a n d t h e s q u e l c h
c l o s e s . IC 3 0 4
3) Power Supply Circuit
VHF Power Supply Switch Circuit and Unlock Circuit
In t h e r e c e i v i n g m o d e , " H " i s o u t p u t f r o m P i n 4 o f S h i f t R e g i s t e r I C 8 a c c o r d i n g to
t h e s e r i a l d a t a f r o m C P U , a n d Q 3 0 a n d Q 2 9 a r e t u r n e d O N , t h e n 8 V i s a d d e d t o
8 R V l i n e .
In t h e t r a n s m ittin g m o d e , j u s t s a m e a s r e c e i v i n g , " H " i s o u t p u t f r o m P i n 5 o f I C 8 ,
a n d Q 3 2 a n d Q 3 1 a r e t u r n e d O N , th e n 8 V is a d d e d t o 8 T V l in e .
W h e n P L L i s u n l o c k e d , t h e u n l o c k s w i t c h Q 3 8 i s t u r n e d O N b e c a u s e " H " i s o u t p u t
f r o m P L L - V C O u n i t U L t e r m i n a l . T h e n 8 T V s w itc h 0 3 2 i s t u r n e d O F F .
A c c o r d i n g l y t h e t r a n s m itt in g i s e n a b le w h e n P L L i s u n l o c k e d b e c a u s e 8 T V l i n e
d o e s n o t w o r k .
Q5 Q6 Q7 Q8
UHF Power Supply Switch Circuit and Unlock Circuit
In t h e r e c e i v i n g m o d e , " H " i s o u t p u t f r o m P i n 4 o f S h i f t R e g i s t e r IC 3 0 4 a c c o r d i n g t o
t h e s e r i a l d a t a f r o m C P U , a n d 0 3 3 2 a n d 0 3 3 0 a r e t u r n e d O N , t h e n 8 V is a d d e d to
8 R V l i n e .
W h e n t r a n s m itt in g t h e s ig n a l , j u s t s a m e a s r e c e i v i n g , " H " i s o u t p u t fr o m P i n 5 o f
I C 3 0 4 , a n d 0 3 3 3 a n d 0 3 3 1 a r e t u r n e d O N , t h e n 8 V is a d d e d t o 8 T V l i n e .
T h e U n l o c k S w i t c h 0 3 3 4 is t u r n e d O N w h e n P L L i s u n l o c k e d , b e c a u s e " H " i s
o u t p u t f r o m P L L - V C O u n i t U L t e r m in a l , a n d 8 T V S w i t c h 0 3 3 3 i s t u r n e d O F F .
A c c o r d i n g l y t h e t r a n s m i t t i n g i s e n a b le w h e n P L L is u n l o c k e d b e c a u s e 8 T V l in e
d o e s n o t w o r k .
A F S ig n a l C ir c u it
VHF FM:
T h e A F s i g n a l o u t p u t f r o m I F u n i t I C 2 P i n 1 2 is m a d e t h e A F f r e q u e n c y c h a r a c t e r i s
t i c s 3 k H z o r b e l o w b y t h e d e - e m p h a s i s c ir c u i t ( c o n s i s t i n g o f R 1 1 2 , C 1 6 5 , R 1 2 8 ,
C 1 7 0 , R 1 7 1 a n d C 1 7 1 ) , t h e n a m p l if ie d b y A F p r e a m p l i f i e r Q 3 5 .
T h e a m p l i f i e d s ig n a l is m a d e t h e A F f r e q u e n c y c h a r a c t e r is t i c s 3 0 0 H z o r m o r e b y
t h e d e - e m p h a s i s c i r c u i t ( c o n s i s t in g o f Q 3 7 , R 1 3 8 , C 1 7 4 , R 1 3 9 a n d C 1 7 5 ) .
T h e d e - e m p h a s i z e d A F s i g n a l R O V is m u t e d i n t h e s u b c o n t r o l u n i t , a n d a f t e r t h e
s i g n a l is a d j u s t e d b y e l e c t r o n i c v o l u m e 1 C 6 0 5 , a d d e d t o A F p o w e r a m p l i f i e r I C 3
P i n 2 a s A O V t o d r i v e t h e s p e a k e r , t h e n t h e s i g n a l i s a m p l i f i e d .
VHF AM:
T h e A F s i g n a l o u t p u t f r o m I F u n i t I C 3 0 2 , P in 1 3 i s m a d e t h e A F f r e q u e n c y c h a r a c
t e r is t i c s 3 k H z o r b e l o w b y t h e d e - e m p h a s i s c i r c u i t ( c o n s i s t i n g o f R 1 1 0 , C 1 6 3 ,
R 1 1 1 , C 2 2 9 a n d C 1 6 4 ) , a n d a m p l i f i e d b y th e A M a m p l i f i e r Q 3 4 .
T h e n t h e s i g n a l i s p r o c e s s e d ju s t s a m e a s t h e F M .
UHF:
T h e A F s i g n a l o u t p u t f r o m I F u n i t I C 3 0 2 , P i n 1 1 is m a d e t h e A F f r e q u e n c y c h a r a c
t e r i s t i c s 3 k H z o r b e lo w b y t h e d e - e m p h a s i s c i r c u i t ( c o n s i s t i n g o f R 3 9 2 , C 4 3 3 ,
R 4 0 6 , C 4 4 9 , R 4 1 3 a n d C 4 4 8 ) , t h e n a m p l if ie d b y A F p r e a m p l i f i e r Q 3 2 8 .
T h e a m p l if ie d s i g n a l is m a d e t h e A F f r e q u e n c y c h a r a c t e r is t i c s 3 0 0 H z o r m o r e b y
t h e d e - e m p h a s i s c i r c u i t ( c o n s i s t i n g o f Q 3 2 9 , R 4 0 9 , C 4 5 1 , R 4 1 2 a n d C 4 5 2 ) .
T h e d e - e m p h a s i z e d A F s i g n a l R O U i s m u t e d b y t h e s u b c o n t r o l u n i t , a n d a f t e r t h e
s i g n a l is a d j u s t e d b y e l e c t r o n i c v o l u m e I C 6 0 5 , a d d e d t o A F p o w e r a m p l i f i e r I C 3
P i n 5 a s A O U t o d r iv e t h e s p e a k e r , t h e n t h e s i g n a l i s a m p l i f i e d .
AF Mute Circuit
Electronic Volume Circuit
VHF:
W h e n t h e s q u e l c h i s c l o s e d d u r in g n o s ig n a l , t w o m u t e s w i t c h e s Q 6 1 3 a n d Q 6 1 6
a r e t u r n e d O N b y t h e s i g n a l f r o m I C 6 0 1 P i n 5 0 , t h e n t h e v o i c e o u t p u t i s m u t e d .
UHF:
W h e n t h e s q u e l c h i s c l o s e d d u r i n g n o s i g n a l t w o m u t e s w i t c h e s Q 6 1 4 a n d Q 6 1 7
a r e t u r n e d O N b y t h e s i g n a l fr o m I C 6 0 1 P i n 4 9 , t h e n t h e v o i c e o u t p u t i s m u t e d .
VHF:
T h e m u t e d A F s i g n a l R O V i s a d d e d t o t h e e l e c t r o n i c v o l u m e I C 6 0 5 P i n 3 . T h e
a d d e d s i g n a l i s a t t e n u a t e d i n l O d B s t e p s f r o m 0 t o - 6 0 d B . T h e r e a r e 7 s t e p s f r o m 0
t o - 6 0 u B t o a t t e n u a t e t h e s i g n a l . T h e s ig n a i is o u t p u t f r o m P in 2 . T h e o u t p u t s ig n a l
is a m p l i f i e d b y t h e a m p l i f i e r Q 6 0 1 a n d a d d e d t o I C 6 0 5 P i n 5 a g a i n . T h e s ig n a l is
a t t e n u a t e d i n 2 d B s t e p s . T h e r e a r e 5 s t e p s f r o m 0 t o 8 d B t o a t t e n u a t e t h e s i g n a l .
T h e s i g n a l i s o u t p u t f r o m P i n 6 .
T h e a t t e n u a t i o n l e v e l is c o n t r o l l e d b y t h e s e r i a l d a t a f r o m C P U I C 6 0 1 a f t e r t h e
V R 5 0 2 r e g i s t e r v a l u e is c h a n g e d t o t h e v o l t a g e a n d c o n v e r t e d t o A / D .
UHF:
T h e m u t e d A F s i g n a l R O U i s a d d e d t o t h e e le c t r o n i c v o l u m e I C 6 0 5 P i n 1 4 . T h e
a d d e d s i g n a l i s a t t e n u a t e d i n 1 O d B s t e p s f r o m 0 t o - 6 0 d B . T h e r e a r e 7 s t e p s fr o m 0
t o - 6 0 d B t o a t t e n u a t e t h e s i g n a l . T h e s ig n a l is o u t p u t f r o m P i n 1 5 . T h e o u t p u t
s ig n a l i s a m p lifie d b y t h e a m p l i f i e r Q 6 0 2 a n d a d d e d t o I C 6 0 5 P i n 1 2 a g a i n . T h e
s ig n a l i s a t t e n u a t e d i n 2 d B s t e p s . T h e r e a r e 5 s t e p s f r o m 0 t o 8 d B t o a t t e n u a t e t h e
s ig n a l . T h e s ig n a l i s o u t p u t f r o m P i n 1 1 .
T h e a t t e n u a t i o n l e v e l is c o n t r o l l e d b y t h e s e r i a l d a t a fr o m C P U I C 6 0 1 a f t e r t h e
v a l u e o f V R 5 0 1 r e g i s t e r i s c h a n g e d t o t h e v o lt a g e a n d c o n v e r te d t o A / D .
Speaker Output Switching Circuit
T h e A F s i g n a l s , A O V ( V H F ) a n d A O U ( U H F ) a r e p a s s e d t h r o u g h t h e a n a l o g u e
s w i t c h I C 5 , a n d m i x e d . T h e s i g n a l i s a d d e d t o t h e a u d i o p o w e r a m p l i f i e r IC 3 P i n 5 ,
t h e n a m p l i f i e d . I n t h i s t im e , t h e v o i c e s o f V H F a n d U H F b a n d s a r e o u t p u t f r o m t h e
s p e a k e r s i m u l t a n e o u s l y .
2. Transmitter System
1) Modulator Circuit VHF/UHF
A f t e r t h e v o i c e i s c o n v e r t e d in t o t h e e l e c t r i c s i g n a l b y t h e m i c r o p h o n e , t h e s ig n a l i s
le d t o t h e m ic r o p h o n e a m p l i f i e r IC 5 0 4 . I C 5 0 4 c o n s i s t s o f t w o o p e r a t i o n a l a m p l if i
e r s i n c l u d i n g t h e p r e - e m p h a s i s c i r c u i t .
T h e a m p l i f i e d v o i c e s i g n a l is a d d e d t o t h e I D C c i r c u i t o f o p e r a t i o n a l a m p l i f i e r .
T h e f r e q u e n c y d e v i a t i o n c a n b e a d j u s t e d i n V R 3 ( V H F ) , o r V R 3 0 5 ( U H F ) . T h e
s ig n a l i s a d d e d t o V C O v a r i c a p f o r r e a c t a n c e m o d u la t i o n o f V H F / U H F .
2) Drive/PA Amplifier Circuit
VHF
T h e t r a n s m i t t i n g s ig n a l f r o m V C O o f V H F b a n d i s ’ a m p l i f i e d b y t h e y o u n g e r a m p l i f i
e r s Q 1 a n d Q 2 , th e n in p u t t o t h e p o w e r m o d u l e I C 1 . T h e t r a n s m i t t in g s i g n a l
a m p l i f i e d t o t h e d e s i r e d l e v e l in I C 1 , i s p a s s e d t h r o u g h t h e l o w - p a s s f i l t e r , a n t e n n a
s w i t c h , a n d h i g h - p a s s f i l t e r i n t h e d u p l e x e r t o a t t e n u a t e t h e s e c o n d a n d t h i r d
h a r m o n i c s e n o u g h , t h e n s u p p l i e d t o t h e a n t e n n a .
UHF:
T h e t r a n s m i t t i n g s i g n a l fr o m V C O o f U H F b a n d i s a m p l i f i e d b y th e y o u n g e r a m p l i f i
e r s Q 3 0 1 , Q 3 0 2 a n d Q 3 0 3 , t h e n i n p u t t o t h e p o w e r m o d u l e I C 3 0 1 . T h e t r a n s m i t
t i n g s ig n a l a m p lifie d t o t h e d e s i r e d l e v e l in I C 3 0 1 i s p a s s e d t h r o u g h t h e l o w - p a s s
f ilte r , a n t e n n a s w i t c h , a n d h i g h - p a s s f i lt e r i n t h e d u p l e x e r t o a t t e n u a t e t h e s e c o n d
a n d th i r d h a r m o n i c s e n o u g h , t h e n s u p p l i e d to t h e a n t e n n a .
3) APC Circuit
VHF:
A p a r t o f t r a n s m i t t in g p o w e r f r o m l o w - p a s s f ilte r i s d e t e c t e d b y D i o d e s D 1 a n d D 2 ,
I ts d e t e c t i o n v o l t a g e is p a s s e d t h r o u g h t h e A P C c i r c u i t o f U H F ( Q 3 0 7 , Q 3 0 8 a n d
Q 3 0 9 ) a n d c o n t r o l s t h e A P C v o l t a g e s u p p l i e d to t h e y o u n g e r a m p l if ie r Q 1 o f V H F
a n d t h e p o w e r m o d u l e I C 1 t o fix t h e o u t p u t p o w e r .
UHF:
A p a r t o f t r a n s m i t t i n g p o w e r f r o m l o w - p a s s f i l t e r i s d e t e c t e d b y D io d e D 3 0 1 a n d
D 3 0 2 . I t s d e t e c t i o n v o l t a g e is p a s s e d t h r o u g h t h e A P C c ir c u it o f U H F ( Q 3 0 7 ,
Q 3 0 8 a n d Q 3 0 9 ) a n d c o n t r o l s t h e A P C v o l t a g e s u p p l ie d t o th e y o u n g e r a m p l if ie r
Q 3 0 1 o f V H F a n d t h e p o w e r m o d u l e I C 3 0 1 t o f ix t h e o u t p u t p o w e r .
4) Air-Cooled Fun Power Control Circuit
T h e a i r - c o o l e d f u n i s b u ilt- i n t o c o o l t h e h e a t s i n k . W h e n t h e P T T i s t u r n e d O N ,
Q 3 3 5 is a l s o t u r n e d O N s i m u l t a n e o u s l y . T h e n t h e f u n t u r n s a t a h ig h s p e e d .
W h e n t h e P T T is t u r n e d O F F , " H " is o u t p u t fr o m I C 3 0 4 P i n 7 , Q 3 3 5 i s t u r n e d O N ,
t h e n t h e f u n t u r n s a t a l o w s p e e d .
T h e t e m p e r a t u r e s w i t c h T S 1 i s in s t a l le d . W h e n t h e t e m p e r a t u r e in t h e u n it g o e s
u p o v e r 9 5 ° C , t h e t h e r m a l r e l a y o p e n s , a n d Q 4 0 i s t u r n e d O N . A l s o Q 4 ( V H F ) a n d
Q 3 0 5 ( U H F ) a r e tu r n e d O F F , a n d t h e u n i t is s e t t o l o w - p o w e r e v e n w h i l e tr a n s m i t
t in g a t H I o r M I D p o w e r .
3 . P L L C ir c u it
1) PLL Synthesizer Circuit
V H F a n d U H F b a n d s h a v e t h e i r o w n u n i t s i s o l a t e d l y . T h e s u b u n i t h a s t h e d u a l
c o n s t r u c t i o n c o n s i s t i n g o f V C O in t h e u p p e r p l a c e a n d P L L i n t h e l o w e r p la c e .
B o t h o f th e s u b u n i t s a r e p a c k e d i n a h a r d s h i e l d c a s e s o a s n o t to b e i n f l u e n c e d
b y t h e c i r c u m s t a n c e s .
T h e c r y s t a l X 1 o f 1 2 . 8 M H z i s o s c i lla t e d i n I C 7 5 1 ( V H F ) , t h e o u t p u t is l e d t o Q 2 2 ,
a n d t h e o u t p u t o f Q 2 2 is a d d e d t o I C 8 5 1 ( U H F ) .
T h e r e f e r e n c e o s c i l l a t i n g f r e q u e n c y is d i v i d e d i n I C 7 5 1 a n d I C 8 5 1 t o g e t th e
r e f e r e n c e fr e q u e n c y o f 5 k H z o r 6 . 2 5 k H z .
T h e c o m p a r is o n f r e q u e n c y i s d i v i d e d b y t h e P L L o f p u l s e s w a l l o w s y s t e m , I C 7 5 1
a n d I C 8 5 1 a f t e r t h e V C O o u t p u t i s a m p l i f i e d in Q 7 0 3 ( V H F ) a n d Q 8 0 3 ( U H F ) . T h e
r e f e r e n c e fr e q u e n c y o f 5 , 1 0 , 1 2 . 5 , 1 5 , 2 0 , 2 5 , 3 0 , 5 0 k H z s t e p s c a n b e o b t a i n e d
b y d i v i d i n g X 1 .
T
HK3-
TXJ RX
2SK508K52
UN5211
osc
Q 7 5 5
OSC
A 0802 n
2SC4081
LNT
BU FF
2SC4215Y
SH IFT
' R EGI STE R
144MHz PLL-VCO BiockDiagram
2SC3324B
2SC4081 LNT*2
0 8 5 1 . Q 8 5 2 , Q 8 5 3
HKh
T
!
2SK880
R R
M56760FP
IC 8 5 1 I $
B U F F
2SK508K52 2SC4215Y
UN511L
Q855
S H I F T
REG IST E R
■*-
2SC4215Y
0 8 5 6
FO U T
430MHz PLL-VCO BiockDiagram
2) V -V C O C irc u it
3) V Sub U-VCO Circuit
4) U-VCO Circuit
5) U Sub V-VCO Circuit
S W Q 7 0 4 i s t u r n e d O N , a n d t h e d e s i r e d f r e q u e n c y i s o s c illa t e d d i r e c t l y in C o l p i t t s
o s c i lla t i n g c i r c u i t c o n s i s t i n g o f F E T Q 7 5 7 . V C O c o n t r o l v o l t a g e is a d d e d t o t h e
v a r i c a p s D 7 0 2 a n d D 7 0 3 , a n d t h e o s c i l l a t in g f r e q u e n c y i s t u n e d .
S W 2 b e c o m e s " H " w h i l e r e c e i v i n g , a n d Q 7 0 1 a n d D 7 0 1 a r e t u r n e d O N t o s h i f t th e
o s c i l l a t i n g f r e q u e n c y .
S W Q 7 5 5 i s t u r n e d O N , a n d t h e d e s i r e d f r e q u e n c y i s o s c illa t e d d i r e c t l y i n C o l p it t s
o s c illa t i n g c i r c u i t c o n s i s t i n g o f F E T 7 5 7 . V C O c o n t r o l v o l t a g e i s a d d e d t o t h e
v a r ic a p s D 7 5 1 a n d D 7 5 2 , a n d t h e o s c i l l a t i n g f r e q u e n c y is tu n e d .
( Q 7 0 4 is tu r n e d O F F in 1 4 4 M H z b a n d , a n d t h e o s c i l la t i o n is s t o p p e d . )
S W Q 8 0 4 i s t u r n e d O N , a n d t h e d e s ir e d f r e q u e n c y is o s c i l l a t e d d i r e c t l y i n C o l p i t t s
o s c illa t i n g c ir c u i t c o n s i s t i n g o f F E T Q 8 0 2 . V C O c o n t r o l v o l t a g e Is a d d e d t o t h e
v a r ic a p s D 8 0 2 a n d D 8 0 3 , a n d t h e o s c i l l a t i n g f r e q u e n c y is tu n e d .
S W 2 b e c o m e s " L " w h i l e r e c e i v i n g , a n d Q 8 0 1 a n d D 8 0 1 a r e t u r n e d O F F t o s w i t c h
t h e o s c i l la t i n g f r e q u e n c y .
S W Q 8 5 5 is t u r n e d O N , a n d t h e d e s i r e d f r e q u e n c y is o s c i l l a t e d d i r e c t l y in C o l p i t t s
o s c iiia t i n g c ir c u i t c o n s i s t i n g o f F E T Q 8 5 7 . V C O c o n t r o l v o l t a g e is a d d e d t o t h e
v a r ic a p s D 8 5 1 a n d D 8 5 2 , a n d t h e o s c i l l a t i n g f r e q u e n c y is t u n e d .
( Q 8 0 4 is t u r n e d O F F i n 4 3 0 M H z b a n d , a n d t h e o s c i l la t i o n is s t o p p e d . )
6) Shift SW (SW1) Circuit
W h e n P T T is t u r n e d O N , S W 1 o f P L L I C b e c o m e s " H " m o m e n t a r i l y , a n d t h e s w i t c h
Q 7 5 9 ( V H F ) o r Q 8 5 9 ( U H F ) i s t u r n e d O N .
T h e c o n s t a n t o f L P F i s c h a n g e d a n d t h e lo c k u p t im e f r o m r e c e i v i n g t o t r a n s m it t in g
is s h o r t e n .
4. Front CPU and Peripheral Circuit
1) Reset Circuit
W h e n B p o w e r s u p p l y i s t u r n e d O N , " L " p u l s e o f a b o u t 4 0 m s i s o u t p u t f r o m I C 5 0 3
w i t h R e s e t F u n c t i o n P i n 4 , a n d C P U I C 5 0 1 is r e s e t .
W h e n B p o w e r s u p p l y i s t u r n e d O F F , t h e d e c r e a s i n g o f 5 V l i n e is d e t e c t e d in
I C 5 0 3 . T h e o u t p u t is s h if t e d f r o m " H " t o " L " l e v e l .
2) Microphone Key Input Circuit
W h e n t h e s w i t c h ( P T T , U P o r D O W N ) o n t h e m i c r o p h o n e i s t u r n e d O N , " L " l e v e l is
in p u t t o C P U I C 5 0 1 s i m u l t a n e o u s l y .
3) LCD Display Circuit
L C D d i s p l a y c i r c u i t c o n s i s t s o f L C D d r iv e r I C 5 0 2 , i t s p e r ip h e r a l c i r c u i t a n d L C D .
T h e lig h t i n g m o d e is d y n a m i c l i g h t in g o f 1 / 3 d u t y a n d 1 / 3 b ia s , a n d t h e s e r i a l d a t a
o f t h e c o n t e n t i s t r a n s m i t t e d t o t h e L C D d r i v e r f r o m V 1 ~ V 5 o f I C 5 0 1 .
4) Lighting and Dimmer Circuit
S o o n a f t e r t h e p o w e r is t u r n e d O N , " H " is o u t p u t f r o m I C 5 0 1 P i n 8 5 ( P S W O ) a n d
P 2 5 ( L E D 1 ) , a n d t h e L E D f o r k e y l i g h t i n g ( g r e e n ) a n d t h e L E D f o r L C D b a c k
lig h t i n g ( g r e e n ) a r e lit .
W h e n t h e F k e y i s p u s h e d , " L " is o u t p u t f r o m I C 5 0 1 P i n 2 5 , a n d t h e L E D ( g r e e n ) i s
t u r n e d O F F , t h e n " H " i s o u t p u t f r o m P i n 2 6 ( L E D 2 ) a n d t h e L E D f o r k e y lig h t i n g
( o r a n g e ) i s t u r n e d O N . A l s o w h e n t h e B a n d s w i t c h i s p u s h e d , t h e L E D o f t h e b a n d
w h i c h c a n b e t r a n s m i t t e d is l i t g r e e n . T h e L E D c h a n g e s f r o m g r e e n t o r e d w h i l e
t r a n s m it t in g ( d u a l c o l o r e d L E D ) .
W h e n t h e D i m m e r S w i t c h i s t u r n e d O N , C P U I C 5 0 1 P i n 8 1 ( D I M ) c h a n g e s f r o m " H "
t o " L " n o r m a l ly , a n d Q 5 0 7 a n d Q 5 0 8 a r e t u r n e d O F F . A c c o r d i n g l y t h e c u r r e n t i s
c o n t r o l l e d t o d i m t h e L E D D 5 0 1 - D 5 0 8 .
5. Sub CPU and Peripheral Circuit
1) Reset and Backup Circuit
W h e n B p o w e r s u p p l y i s t u r n e d O N , " L " p u l s e o f a b o u t 2 0 m s is o u t p u t f r o m I C 6 1 2
( e q u i p p e d w i t h R e s e t F u n c t i o n ) P i n 4 , a n d C P U I C 6 0 1 is r e s e t .
W h e n B p o w e r s u p p l y is t u r n e d O F F , t h e d e c r e a s i n g o f 5 V l i n e is d e t e c t e d in
I C 5 0 3 . T h e o u t p u t is s h i f t e d f r o m " H " t o " L " .
A l s o w h e n p o w e r s u p p l y B is t u r n e d O F F , I C 6 0 1 P i n 8 0 ( B U ) b e c o m e s " L " , a n d t h e
u n i t e n t e r s I n t o t h e B a c k u p M o d e .
T h e c o n t e n t s o f t h e m e m o r y i s w r i t t e n o n E 2 P R O M I C 6 1 0 i n t h e B a c k u p M o d e .
2) Beep Sound Output Circuit
T h e s q u a r e p u l s e i s o u t p u t f r o m C P U I C 6 0 1 , P i n 4 0 ( B E P 1 ) , a n d P i n 4 3 ( B E P 2 ) ,
t h e n t h e s i g n a l is i n t e g r a t e d b y C R t o o b t a i n t h e s i n e w a v e .
3) DTMF Decoder Circuit
VHF:
A p a r t o f A F s i g n a l ( R A V ) f r o m I C 2 P i n 1 2 is c o n t r o l l e d b y C P U I C 6 0 1 , a n d i n p u t t o
D T M F d e c o d e r I C 6 0 4 P i n 7 .
T h e i n p u t s i g n a l is ju d g e d w h e t h e r a v a i l a b l e o r n o t b y t h e s i g n a l j u d g e c i r c u i t in
I C 6 0 4 . T h e n t h e ju d g e d s ig n a l is c o n v e r t e d t o 4 - b i t c o d e , a n d s e n t t o I C 6 0 1 .
UHF:
A p a r t o f A F s i g n a l ( R A U ) f r o m I C 3 0 2 P i n 1 1 i s c o n t r o l le d b y C P U I C 6 0 1 t o i n p u t t o
r\Tfc jr- -i-i_i/~*cr\ A r\:_~7
u i i v i r u ttu u u w i iv- /u u h r n i / .
T h e i n p u t s i g n a l i s ju d g e d w h e t h e r a v a i l a b l e o r n o t b y t h e s i g n a l j u d g e c i r c u i t in
I C 6 0 4 . T h e n t h e j u d g e d s i g n a l i s c o n v e r te d t o 4 - b i t c o d e , a n d s e n t t o I C 6 0 1 .
4) Microphone Remote Control Circuit
T h e D T M F s ig n a l f r o m t h e m i c r o p h o n e ( M R ) is i n p u t t o D T M F d e c o d e r I C 6 0 3 P i n 7 .
T h e in p u t s ig n a l is ju d g e d w h e t h e r a v a i l a b l e o r n o t b y t h e s ig n a l ju d g e c i r c u i t in
I C 6 0 4 . T h e n t h e j u d g e d s i g n a l is c o n v e r t e d t o 4 - b i t c o d e , a n d s e n t t o I C 6 0 1 .
5) DTMF Encoder Circuit
D T M F e n c o d e r I C 6 0 2 g e n e r a t e s t h e a u d i o s in e w a v e ( b a s e d o n t h e 4 - b i t d a t a f r o m
I C 6 0 1 ) , a n d s y n t h e s i z e s t h e s i g n a l w h i c h is a p p l i e d f o r t h e D T M F d i a l i n g a n d
o u t p u t s t h e s ig n a l f r o m P i n 1 4 .
A f t e r t h e l e v e l o f D T M F s ig n a l i s a d j u s t e d b y t h e v a r ia b l e r e g i s t e r V R 6 0 2 , a m p l i
f i e d b y I C 6 0 8 . T h e a m p l i f i e d s i g n a l is a d d e d t o e a c h v a r ic a p o f V C O f o r m o d u l a
t i o n . A t t h e s a m e t i m e t h e m o n i t o r s o u n d is p a s s e d t h r o u g h t h e A F c i r c u i t , a n d
o u t p u t f r o m t h e s p e a k e r .
6) Cross Band Repeater Circuit
In t h e C r o s s B a n d R e p e a t e r M o d e , Q 6 Q 3 in C r o s s B a n d M u t e C i r c u i t is t u r n e d
O F F , a n d th e A F s i g n a l i s c o n n e c t e d to t h e M o d u l a t i o n C ir c u i t .
W h e n t h e s q u e l c h o f V H F is o p e n e d , t h e A F s i g n a l R O V ( V H F ) i s u n m u t e d . T h e n
a f t e r t h e le v e l o f s i g n a l is a d j u s t e d b y t h e v a r i a b l e r e g i s t e r V R 6 0 3 , i t i s a m p l i f i e d b y
I C 6 0 8 . T h e a m p lifie d m o d u l a t i o n s ig n a l i s a d d e d t o t h e v a r i c a p f o r t h e m o d u l a t io n
o f U H F V C O , t h e n U H F e n t e r s i n t o th e t r a n s m itt in g m o d e .
W h e n t h e s q u e l c h o f U H F is o p e n e d , t h e A F s i g n a l R O U ( U H F ) i s u n m u t e d . T h e n
a f t e r t h e l e v e l o f s i g n a l i s a d j u s t e d b y t h e v a r i a b l e r e g i s t e r V R 6 0 3 , i t is a m p l i f i e d b y
I C 6 0 8 . T h e a m p l if ie d m o d u l a t i o n s i g n a l i s a d d e d t o t h e v a r i c a p f o r t h e m o d u l a t i o n
o f V H F V C O , t h e n V H F e n t e r s in t o t h e t r a n s m i t t i n g m o d e .
7) Tone Burst Output Circuit
W h i l e p r e s s i n g t h e T o n e B u r s t k e y , t h e s q u a r e p u l s e i s o u t p u t f r o m C P U I C 6 0 1 ,
P i n 2 7 ( 1 7 5 0 ) , t h e n t h e w a v e is i n t e g r a t e d b y C R to o b t a i n t h e s i n e w a v e . A f t e r t h e
le v e l o f t h e s ig n a l i s a d j u s t e d b y t h e v a r ia b l e r e g i s t e r V R 6 0 1 . T h e s i g n a l i s
a m p l i f i e d b y I C 6 0 8 . T h e n i t is a d d e d t o e a c h v a r ic a p f o r m o d u l a t i o n o f V C O .
6. CTCSS Tone Encoder Circuit
1) Reset Circuit
T h e C P U is i n i t i a l i z e d b y s e t t in g t h e R E S t e r m i n a l t o " L " f o r 1 0 m s e c o r m o r e
b e c a u s e t h e o s c i lla t i o n o f th e C P U is u n s t a b l e j u s t a f t e r t h e p o w e r is O N .
2) Tone Generating Circuit
T h e m i m i c s i n e w a v e i s o u t p u t f r o m I C 9 8 1 P i n 1 0 ~ 1 3 , a n d c o n v e r t e d t o t h e a n a
l o g u e w a v e b y t h e la d d e r r e g i s t e r t o g e t 5 0 w a v e s w i t h i n 6 7 . 5 - 2 5 4 , 1 .
A f t e r a m p l if ie d b y Q 9 8 1 , t h e t o n e s i g n a l is o u t p u t to T O U T t e r m i n a l.
13
7 . P a c k e t C i r c u i t
1 2 0 0 b p s m o d e is t h e n o r m a l p a c k e t e q u i p p e d w ith t h e s q u e l c h c o n t r o l .
T h e m o d u l a t i o n s i g n a l I n p u t f r o m t h e f r o n t M I C c o n n e c t o r C N 5 0 4 i s a m p l i f i e d b y
m i c r o p h o n e a m p l i f i e r o f I C 5 0 4 , a n d l e d t o I D C c ir c u i t , t h e n V C O i s m o d u l a t e d .
A s f o r t h e r e c e i v in g s i g n a l, s q u e l c h c o n t r o l l e d A F s i g n a l i s o u t p u t f r o m S P O U T .
9 6 0 0 b p s m o d e i s u s e d f o r 9 6 0 0 b p s G M S K / G 3 R U H P a c k e t c o m m u n i c a t i o n .
T h e m o d u l a t i o n s i g n a l i s in p u t f r o m r e a r j a c k , a n d t h e s i g n a l i s l i m i t e d i n D 5 0 4 ,
Q 6 2 1 , t h e V C O is m o d u l a t e d d i r e c t l y w i t h o u t p a s s i n g t h e ID C c i r c u i t .
A s f o r t h e r e c e i v i n g s i g n a l , F M d e m o d u l a t e d s ig n a l o u t p u t i s i n p u t t o t h e V / U
s e l e c t o r o f I C 1 1 p a s s i n g t h r o u g h t h e b u f f e r o f Q 1 2 a n d Q 3 3 4 .
T h e V / U s e l e c t o r is c o n t r o l l e d b y t h e c o n t r o l s i g n a l o f C P U s o t h a t t h e d e t e c t i o n
,*N..+rN..+ :,•> 1 11/ -1
u u ipu i io ic u iu ur\ i .
Input level
Deviation
Output level
1200bps
10mVp-p
9600bps
2Vp-p
3.5+/-0.5kHz 2+/-0.5kHz 0~5Vrms/8Q
Variable
300mvp-p/47k0
8) Front CPU I/O Port (IC501)
No.
| Pin Ñame
1
PC3/AN11
2
AVSS GND
3
TEST
4
X2
5
X1 6 VSS 7 OSC1 8
OSC2 OSC2 o System clock 9 RES RES
10
MDO MDO I
11
P20/IRQ4/ADTRG FUP I Active Low
12 P21/UD FDN I Active Low 13 P22 PTT I Active Low PTT key input 14 P23
P24
15 16 P25 17
P26
18 P27 TSQ I Active Low
19 P30/SCK1 RPT I 20 P31/SI1 REV I Active Low REV key input 21 P32/S01 CALL
P33/SCK2 MHZ I Active Low
22 23 P34/SI2 MR I 24
P35/S02 25 P36/STRB LED1 26 P37/CS LED2 l
27 VSS 28 V3 V3 I 29 V2 V2 30
V1 31 VCC 32 PA3/COM4 33 PA2/COM3 34 PA1/COM2 35
PAO/COM 1 36
P50/WKP0/SEG1 37
P51/WKP1/SEG2 38
P52/WKP2/SEG3
P53/WKP3/SEG4 NC
39
40
P54/WKP4/SEG5 41
P55/WKP5/SEG6
42
P56/WKP6/SEG7
43
r57/VvKP7/3EG8
44
P60/SEG9
P61/SEG10
45 46 P62/SEG11
47 P63/SEG12
P64/SEG13
48
P65/SEG14
49
P66/SEG15 NC
50
Function I I/O
- -
-
-
- GND OSC1 I System clock
FUNC I Active Low Function key input LM I Active Low LM key input SRCH
SCAN
VFO
-
V1
-
NC
COM3 COM2 COM1 o
NC NC NC
NC NC NC NC NC
NC NC
NC NC NC
I Logic | Description
I I
0
I
I
I
I
Active Low Search key input
I Active Low Scan key input
Active Low RPT key input
I
Active Low CALL key input
Active Low
l Active Low VFO key input I Active High
Active High
I
I
I I I
o o
-
- -
-
- - -
- - -
-
-
-
-
- - -
- - -
-
-
- -
- - -
-
-
-
-
-
- -
-
-
-
-
-
-
- -
- -
-
-
-
-
-
-
-
-
CPU reset (Mode terminal) Microphone up key input Microphone down key input
TSQ key input
MHz key input MR key input
Key illumination LED ON Key illumination while FUNC key is pressed.
- LCD power supply
LCD power supply LCD power supply
-
LCD common output 3 LCD common output 2
LCD common output 1
-
-
-
-
-
-
-
-
| Pin Name
No.
P67/SEG16
51 52 P70/SEG17
53 P71/SEG18 54
P72/SEG19
55
P73/SEG20
56 P74/SEG21
57 P75/SEG22
P76/SEG23
58
P77/SEG24
59
P80/SEG25
60
P81/SEG26
61
62 P82/SEG27
63 P83/SEG28
64 P84/SEG29
P85/SEG30
65
P86/SEG31
66 67 P87/SEG32
P90/SEG33
68
P91/SEG34
69 70 P92/SEG35
P93/SEG36
71
P94/SEG37/M
72
P95/SEG38/DO
73
74
P96/SEG39/CL2 CL2
P97/SEG40/CL1
75 76
VCC
77 p io/tm o w
P11/TMOFL
78 79
P12/TM0FH VTX
80 P13/TMIG
P14/PWM
81
P15/IRQ1/TMIB PSW
82 83 P16/IRQ2/TMIC ENC1 I 84
P17/IRQ3/TMIP ENC2 P40/SCK3
85 86 P41/RXD
P42/TXD
87 88 P43/IRQ0 NC I 89
AVCC GND I
PBO/ANO
90
PB1/AN1
91 92 PB2/AN2
PB3/AN3 VSQ
93
PB4/AN4
94 95 PB5/AN5
| Function
| I/O
NC - - - NC
NC NC NC NC NC NC NC NC
NC NC NC NC NC NC NC NC
NC NC NC
M
DO O
CL1
- UPT o
UTX
VPT 0 DIM
PSWO Active High RXD I
TXD
VHF I UHF I VVOL
UVOL I USQ
96 PB6/AN6 UP/DN I 97 PB7/AN7
98 PC0/AN8 BP1
PC1/AN9
99
100 PC2/AN10
NC I
BP2 BP3 I A/D Band pian 3
I Logic
-
-
- - -
- - -
-
-
-
-
-
- - -
-
-
-
- - -
- - -
- - -
-
-
- - -
-
O
o
0
I
0 Active High TX lamp output 0 Active High TX lamp output
- -
- -
- -
- -
- -
-
- -
- -
-
-
- -
-
- -
-
-
-
-
- -
Active High TX band display
Active High
| Description
-
-
-
-
LCD driver AC signal LCD shift resistor output LCD shift resistor shift signal
LCD data latch signal
TX band display
o Active High La m p d im m e r c ontrol
I
Positive edge
Active Low Rotary encoder Up input
I
Active Low
Pulse Pulse
- -
- Active Low Active Low
I I
I
I
I
A/D VHF volume A/D A/D UHF volume A/D UHF squelch A/D Relay microphone control input UP/DN
- -
A/D A/D
Power switch input
Rotary encoder Down input Front unit 5V power switch Serial communication receiving data Serial communication transmitting data
A/D power supply VHF key UHF key
VHF squelch
Band plan 1 (destination) Band plan 2
9 ) M a in C P U I/O P o r t ( IC 6 0 1 )
No.
1
2 XTAL
3 EXATL 4
5 MD2
c
u 7 8 VCC VCC
n
J7
10 11 P50/TXD0 12 VSS 13 P97/WAIT 14 P96/
15 16 17 P93/RD 18 P92/IRQ0 19 P91/IRQ1 CKE
20 21 22 23 24
25 P64/FTIC STPV o Active High VHF side PLL strobe
26 P65/FTID STBV 27 28 P67/IRQ7 29 AVCC 30 31 P71/AN1 32 P72/AN2 ULU 33 P73/AN3 34 P74/AN4 SMV A/D
35 P75/AN5 36 P76/AN6/DA0 PTTS 37
38 39 40 41 42 43 44 P45/TMRI1 BMUU
45 P46/PW0 46 47 VCC 48 P27/A15
49 P26/A14 MUTU o Active High
50
Pin Name
RES
MD1
NMi
STBY
nco/cpi/n
r >jiiyov-/r\u P51/RXD0 RXD I
P95/AS P94/WR STBE
P90/ADTRG/IRQ2
P60/FTCI STPU o Active High UHF side PLL strobe P61/FTOA STBU o Active High UHF side 4094 strobe
P62/FTIA P63/FTIB DATU
P66/FTOB/IRQ6
P70/AN0 SDU
P77/AN7/DA1 AVSS P40/TMCI0 P41/TMOO
P42/TMRI0 DTMU P43/TMC11 P44/TM01
P47/PW1 SQUD o Active High
P25/A13
Function
RES OSC1
OSC2 O
-
-
-
-
S5v O Active Low
TXD
- - - - SCL1
- - - SDA
DATE o
-
DATV o
CKU o
I/O Logic Description
I - - I
-
-
I Active High I
Active High Single chip mode i I
- - -
o
o
I/O Pulse
o
I
o
n
- -
- -
-
-
Pulse
-
-
-
-
-
-
-
o Active High VHF side 4094 strobe
1750
CKV o
- - - -
SMU
SDV A/D
ULV
- - - -
- DTMV O BEP1
n
A/D A/D A/D
A/D A/D
- -
o o
BMUV
BEP2
o o o
SQVD
- - - -
XMUT o
MUTV 0
o
Pulse
-
-
-
-
-
-
-
-
Active High
Pulse 1 side beep sound output Active High Active High VHF side DTMF ENC monitor mute signal
Pulse Active High Active High VHF side squelch signal output
Active Low
Active High
CPU clock 9.8304MHz CPU clock 9.8304MHz Single chip mode
5v power switch output Serial communication receiving data Serial communication transmitting data
E2PROM clock
- E2PROM data
Electronic volume strobe Electronic volume data Power ON interrupt Electronic volume/CTCSS clock VHF side data (PLL, 4094)
UHF side clock (PLL, 4094) I II—IET eiHii /Dl 1 ylHQ/IV
II JIUU UUIU L-l_,
1750Hz Tone burst signal output VHF side clock (PLL, 4094)
UHF side squelch signal UHF side S meter signal UHF side PLL unlock signal
VHF side squelch signal
VHF side S meter signal
VHF side PLL unlock signal
PTT input terminal for the packet
- DSQ VHF side DEC signal (4066 control A)
DSQ UHF side DEC signal (4066 control B)
2 side beep sound output UHF side DTMF ENC monitor mute signal
UHF side squelch signal output
Mute signal for cross band repeater UHF side AF mute signal (4066 control C) VHF side AF mute signal (4066 control C)
No.
51 P24/A12
52 53 P22/A10 54
55 P20/A8 TDV 56 57 58 59 60 61 P13/A3 62 P12/A2 63 P11/A1 64
65 66 67 68 P33/D3 PDM
69
70 P35/D5 71 P36/D6 DAT3
72 P37/D7 73
74
75 P81 76 77 78 79 80
Pin Name Function
P23/A11
P21/A9
VSS
P17/A7 DD4 P16/A6 P15/A5 P14/A4
P10/A0 P30/D0 DVD I
P31/D1 PDD P32/D2
P34/D4
VSS
P80 DEE 0 Active High DTMF ENC output enable
P82 MPSW
P83 PKT P84/TXD1/IRQ3 P85/RXD1/IRQ4 P86/SCK1/IRQ5 BU I Active Low Back up signal
STB2 0 Active High UHF side CTCSS strobe signal STB1
TID I TDU I Active Low
-
DD3 DD2 I DD1 DM4 DM3 I DM2 I DM1
DVM
DAT1 o
DAT2 0
DAT4 o
- - -
MMUT
-
-
I/O Logic Description
0 Active High VHF side CTCSS strobe signal
Active Low CTCSS unit detection
UHF side CTCSS tone detection signal
I Active Low VHF side CTCSS tone detection signal
- -
I I
-
-
-
I I
-
-
-
-
I
0 Active High VHF/UHF DTMF DEC enable
I
0 Active High DTMF DEC enable for remote control microphone
-
Active High
Active High DTMF DEC detection for remote control microphone
-
-
0
-
-
VHF/UHF DTMF DEC data VHF/UHF DTMF DEC data VHF/UHF DTMF DEC data VHF/UHF DTMF DEC data DTMF DEC data for remote control microphone DTMF DEC data for remote control microphone DTMF DEC data for remote control microphone
DTMF DEC data for remote control microphone
VHF/UHF DTMF DEC detection
DTMF ENC data DTMF ENC data DTMF ENC data DTMF ENC data
-
o Active High Microphone mute signal
0 Active High Main power switch output 0 Active High
9600BPS packet mode
- - -
- - -
S E M I C O N D U C T O R D A T A
1) AN8010M (XA0119)
Voltage Regulator
Test Circuit Block Diagram
m □ u
Output Common Input
AN8010M
2) BU4094BF (XA0246)
8-Stage Shift Register
Function Table
^—
Output enable
L L
H
H H L L Qn-1 H H
Clock
Strobe Data
X X X X L X
H H H X X
Vdd
Enable
Parallel outputs
Q1
Z Z
No Chg. No Chg.
No Chg.
Qn Qs
Z Q7 No Chg. Z Nc Chg.
Qn-1
No Chg. No Chg.
Block Diagram
Serial outputs
Q7 Q7
Q7
No Chg. No Chg.
No Chg.
Q's
Qs
Qs
Z=High Impedance X=Don't Care
19
Q1
PARALLEL OUTPUT
Q8
3 ) L 7 8 L R 0 5 D ( X A 0 2 8 5 )
Voltage Regulator
Block Diagram
7 8 L R 0 5
Parameter
Symbol Ratings Unit
Input voltage Vin 7.5-20 V Output current
lout 1-150
Output voltage Vout 5.0
4) LA4445 (XA0116)
Audio Power Amplifiers
o z o
fp Oj Oj H- O I— T— i
2 o 5 J l l c o 2 o = > c o o
Q.Q?zmO>OmcL
o
CL
E
mA
V
3 03
(0 Q. (0 O
>>
CD
O
- (n )B S 1
9 )V C C
Î2)P o w e r A mp GN D
8 )O U T 2
Parameter
Symbol
Condition Ratings
!d!e current !cco 75 Voltage gain VG Output power Po Total harmonics distortion THD
Input resistance Ri Output noise voltage VNo Ripple rejection ratio
Channel separation
Rr ch sep
THD=10% 5.5
"Ö
0 II1
Rg=0
Rg=10k£2
Rg=0, Vr=200mV, fR = 100Hz 46
Rg=10kiî, Vo=0dBm 55
51.5
0.15 30
0.6
BS2
Unit
ma dB
W %
kfl
mV
1 mV
dB dB
20
5 ) M 5 6 7 6 0 F P (X A 0 2 3 5 )
540MHz Frequency Synthesizer
Serial data input terminal
Clock input terminal
Reset input terminal Reference Bias
input terminal Local Oscillator input
terminal fmax =540MHz Output portl terminal
Output port2 terminal
Ground terminal
Function Table
P/N input
High or Low
High High
Phase
Locked
Lead Lag
SI n=
CPS d
RST HZ REF zz
FIN CZ
1
2
3
2 O l
4
o >
-si o >
5
o
"n
T 3
SW1 izz
SW2 CZ 7 10
GND I Z Z
PD output
Hi-Z High
Low
6
8
11
16
WCC terminal
Power supply 3 ~ 5.5V 14mA
15
1XIN 1XOUT Reference oscillator
14
___
13
1 LOCK terminal
Reference oscillator input terminal
output terminal
Phase detector output
when locked Low
, pp Phase detector output
12
terminal
I lpi Low pass filter input
terminal
I LFO L°w pass filter
output terminal
p/N Phase switch input terminal
9
of phase comparator
Low Low
Lead Lag
Low
High
21
LFI LFO
Output Power Po (W)
0.2 0.3 0.5 1.0 2.0 3.0 4 6 8 10 12
Input Power (W) 1st Stage Supply Voltage Vcc1 (V)
N < "H H
1 S3«
TT " 11 K
Ul y t* O CO O
X N
\
\
\
Po - P i Po - V c c 1
\
Output Power Po (W)
CO
0
-J^
0 1
o
X
N Tl
00
cn
JJ
Tl
T 3
O £
CD
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cn
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0 0
oo
2
J3
X
>
o
CO
C£
O
■o
o
Ct>
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3
CO
Ct>
ctT
B
■o Ct>
3 c cB
Ü1
<
N
CO
II
N
II
(Ji
o
10
0
1
O
Output terminal
Final DC supply
terminal
2nd stage DC supply terminal
1st stage DC
supply terminal
Input terminal
Fin(Ground)
c n
c n
GO
C D
C D
I 1
—k
a
(400mW)
o
A
Fin(Ground)
O O
O Q.
Output Power Po (W)
CD
410 420 430 440 450 460
Frequency (MHz)
7 ) M C 7 8 0 8 ( X A 0 0 8 2 )
8V Voltage Regulator
8) NJM4066B (XA0095)
Bilateral Switch
SIG.A
IN/OUT [jT
OUT/IN \T_
----------------1 b W A
J ^ L
14 VDD
H ] CONT.A
SIG.B
9) NJM2902M (T1) (XA0265)
Operational Amplifiers
m i t/i m nr
IN/OUT
CONT.B
CONT.C
VSS
I r
swc
121 CONT.D
11
IN/OUT
OUT/IN
1 0
OUT/IN
~8~| IN/OUT
SIG.D
SIG.C
23
1 0 ) N J M 4 5 5 8 ( X A 0 0 9 7 )
Operational Amplifiers
11) R H 5 V A 6 0 A A (X A 0315 )
C-MOS Voltage Detector
Equivalent Circuit
VDD ..............................................
(4>
|vref|
■ o
OUT
:vss
A Output [ A-Input [ A +lnput [
1 A
2
3 6 4
u u u
OUT VDD VSS
RH5VA60AA
A 7
A
PZ]V+
8
5
B Output B -Input
12) ]iP C 1 67 6 G (X A 0 1 5 1 )
RF Amplifier
Block Diagram
Parameter Symbol
Max. supply voltage Vcc Power dissipation Ptot Idle current Icc
Power gain Noise figure Upper frequency fu Isolation Input return loss RLin
Output return loss
Max. output power Po
Output GND
Condition Ratings Unit
6 V
200 mW
no signal 19
GP NF f=500MHz 4.5 dB
ISL
RLout
f=500MHz
3dB down
f=500MHz f=500MHz f=500MHz 9 d3 f=500MHz
22
1200 MHz
28 dB
12
5.5
mA
dB
dB
dBm
13) S-AV17 (XA0185)
144 ~148MHz 60W
RF Power Module
o
6
3
C_ AW- f 7
U 'P l V 1 f
<=
o
<5
1 2 3 4
_
_
ra c
I ? ~ p
3 o
Q.O c
> in $
O
c\i
Q
<u CT>
^ ra r-\ ro
^ c
iS
Q.F
Q. C 5 £ LL 3
=) CM CO -i—
LJ c
s 'g
13 C
t l o s
o CD
Ratings Symbol Ratings
Supply voltage
Vcc 16 Control voltage Vcon 16 V Current IT
Input power
Pi
Output power Po
14 A
600 mvv
65 W
Operation case temperature Tc(opr) -30-+100
Storage temperature Tstg -40-+110
12.5V<Vcc<16V, Vcon <12.5V, Pi=400mW, Zg=ZI=50Q
Unit
V
°C °C
P o , n - F r e q u e n c y
Vcc = Vcon « 12.5V Pi = 400mW Tc - 25°C
Po
60
1
145 147
Frequency(MHz)
0.1 0.2 0.3 0.4 0.5 0.6 Input Power (W)
Po , t7 - Vcon
50
Vcon (V)
25
14) TC4S11F (XA0126)
NAND Gate
IN Ao-
X=A • B
,
________
IN B c
IN B IN A
V S S
y
1
2
3
1
15) TC4S66F (XA0115)
Bilateral Switch
IN/OUT
OUT/IN VSS 3
1
HE
A
5 VDD
u
4 m it y
5
4
4 CONT
OUT X
Q I—
Q =>
C 1
< c o
m
i= >
r i
co
16) TC4W53F (XA0319)
Multiplexer/Demultiplexer
Function Table
Control input
INH A
L L L
H
r Don't Care
L / I V V / I \ L / l U V j l U I I I
H
*
ON channel
ch 0 ch 1
NONE
INH VEE VSS
•
K
2
3
:>
c n CO T |
4
8
/
chO
6
ch1
5
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