Alinco DR-610T User manual

«
DR-61 OT/E Service Manual
CONTENTS
• SPECIFICATIONS
1 ) General...........................................2
2) Transmtter........................................2
3) Recever...........................................2
• CIRCUIT DESCRIPTION
1 ) Recever System..............................3 - 8
2) Transmtter System ............................... 9
3) PLL Crcut ................................. .10-11
4) Front CPU and Perpheral Crcut ........ 11 ~ 12
5) Sub CPU and Perpheral Crcut .......... .12 ~ 13
6) CTCSS Tone Encoder Crcut .................. 13
7) Packet Crcut .................................... 14
8) Front CPU I/O Port (IC501 )................15-16
9) Man CPU I/O Port (IC601) ............... 17 ~ 18
• SEMICONDUCTOR DATA
1) AN8010M ........................................ 19
2) BU4094BF ........................................19
3) L78LR05D.......................................20
4) LA4445...........................................20
5) M56760FP.......................................21
6) M57788MR ...................................... 22
7) MC7808..........................................23
8) NJM4066B .......................................23
9) NJM2902M (T1).................................23
10) NJM4558 ........................................ 24
11 ) RH5VA60AA .....................................24
12) nPC1676G.......................................24
13) S-AV17...........................................25
14) TC4S11F ........................................ 26
15) TC4S66F ........................................ 26
16) TC4W53F........................................26
17) TC9154AP ....................................... 27
18) TC95219F .......................................28
19) TC35305F (TP1).................................29
20) TK10489M.......................................30
21) TK10930VTL .................................... 31
22) Transstor, Dode and LED Outlne Drawngs... 32
23) LCD ....................................... 33-34
• EXPLODED VIEW
1 ) Front Vew .......................................35
2) LCD Vew ........................................ 35
3) VHF Unt Vew...................................36
4) UHF Unt Vew...................................37
Dv A L IN C O E L E C T R O N IC S IN C .
• PARTS LIST
VHF MAIN Unt ............................ 38-40
UHF MAIN Unt ............................. 40-42
VOL Unt..........................................42
FRONT CPU Unt .......................... 44-43
SUB CPU Unt ..............................50- 45
VHF VCO Unt....................................45
VHF PLL Unt .................................... 45
UHF VCO Unt....................................46
UHF PLL Unt...............................54 - 46
AIR Unt...........................................46
ENC Unt ......................................... 47
SP Unt ........................................... 47
FAN Unt ......................................... 47
Packet ............................................47
Mechancal Parts................................ 47
PCB...............................................47
Packng........................................... 47
EHM35B..........................................47
EHM39........................................... 48
• ADJUSTMENT
1) Requred Test Equpment.......................49
2) Adjustment Ponts..........................50 — 51
3) UHF RX Adjustment.............................52
4) UHF TX Adjustment.............................53
5) VHF RX Adjustment.............................54
6) VHF TX Adjustment ............................. 55
• PC BOARD VIEW
1) VHF MAIN/AIR Unt Sde A ..................... 56
2) VHF MAIN/AIR Unt Sde B ..................... 57
3) UHF MAIN/ENC/VOL Unt Sde A .............. 58
4) UHF MAIN/ENC/VOL Unt Sde B .............. 59
5) Front CPU Unt Sde A .......................... 60
6) Front CPU Unt Sde B .......................... 60
7) SUB CPU Unt Sde A ........................... 61
8) SUB CPU Unt Sde B ........................... 61
9) VHF VCO Unt ...................................62
10) VHF PLL Unt....................................62
11) UHF VCO Unt...................................62
12) UHF PLL Unt....................................62
• BLOCK DIAGRAM
1) Man Block Dagram ............................. 63
2) CPU Block Dagram ............................. 64
3) PLL Block Dagram .............................. 65
• SCHEMATIC DIAGRAM
1) VHF MAIN UNIT ........................... 66-67
2) UHF MAIN UNIT ........................... 68-69
3) FRONT CPU UNIT..............................70
4) SUB CPU Unt ................................... 71
5) VHF VCO, PLL Unt ............................. 72
6) UHF VCO, PLL Unt ............................. 73
7) ENC Unt ......................................... 74
8) EHM35B ......................................... 75
9) EHM39................ . ...........................75
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S P E C IF IC A T IO N S
1) General
Frequency Coverage:
Channel steps:
Antenna Impedance:
Microphone Impedance:
Speaker Impedance:
Supply oltage:
Dimensions (Body only):
Weight:
( ersion T)
HF BAND
UHF BAND
( ersion E)
HF BAND
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
UHF BAND 144.000 ~ 145.995MHz
430.000 ~ 439.995MHz
5, 10, 12.5, 15, 20, 25, 30, 50kHz steps
50Q unbalanced
2kQ unbalanced
8Q unbalanced
13.8 olts DC
140mm(W) x 40mm(H) x 162mm(D)
1.1kg (approx.)
(RX)
(RX)
(TX)
(RX)
(RX)
(TX)
(RX/TX)
(RX)
(RX)
(RX/TX)
2) Transm tter
Output Power:
Emission Mode:
Modulation System:
Max. Frequency Deviation:
Spurious Emission:
HF BAND
UHF BAND
F3E (FM), F2E (F2)
Reactance Modulation
+/ -5kHz
not more than -60dB
High: 50W / Mid: 10W/Low: 5W (approx.)
High: 35W / Mid: 10W / Low: 5W (approx.)
3) Rece ver
Modulation Mode:
Receiving System:
Intermediate Frequency:
Sensitivity (12dB SINAD):
Selectivity:
AF Output:
F3E (FM), A3E (AM)
Double Superheterodyne
\ /1 i r n a k r\
v n r d m in 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)
Specifications are subject to change without notice or obligation.
Specifications guaranteed in the amateur band only.
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C IR C U I T D E S C R IP T IO N
1. Rece ver System
1) Rece ver S gnal C rcu t
w
D7, D8
HF
T h e r e c e iv e r s ig 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 is t i n g o f H F : L o w - p a s s f il t e r a n d U H F : h i g h - p a s s f ilt e r , a n d t h e s i g n a l is
d iv i d e d i n t o H F a n d U H F .
06
AN T RF
s w AM P
UHF
D303, D304 Q310
FL1
455kHz
AN T _ J RF RF
SW * AM P AM P
144M Band Rece ver C rcu t
T h e r e c e iv e r 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 le x e r is l e d t o t h e a n t e n n a s w it 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 i g h - p a s s f il te r , t h e s i g n a l i s a m p l if ie d b y R F
a m p l if ie r , . Q 6 . T h e a m p l if ie d s ig n a l is a m p lif 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 lim 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 le b a n d - p a s s f il t e r .
S e c o n d l y t h e s ig n a l is m i x e d w i th t h e s ig n a l f r o m t h e f i r s t l o c a l o s c i lla t o r in t h e f ir 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 ir s t I F . It 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 in t h e
c r y s t a l f i lt e r c i r c u i t. A f t e r a m p lif ie d b y I F a m p lif ie r Q 2 5 , t h e s ig n a l i s le 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 it h t h e s ig n a i f r o m t h e s e c o n d io c a i o s c i l l a t o r in 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 IF , 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 in p u t to
t h e I C 2 P i n 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 il t e r . T h e
s i g n a l i s le d t o t h e l im i t e r a m p lif ie r I C 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 c i r c u it in
I C 2 , t h e n t h e s ig n a l is o u t p u t f r o m P in 1 2 a s t h e A F s i g n a l.
AIR Band Rece ver C rcu t
T h e r e c e iv 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 le 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 i g h - p a s s f ilt e r , t h e s i g n a l is a m p lif ie d b y R F
a m p lif ie r Q 6 . T h e a m p l if i e d s ig n a l is l e d t o t h e b a n d - p a s s f ilt e r in A I R F r o n t U n it ,
a n d a m p li f ie d b y R F a m p l if 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 is m ix e d w it h t h e s i g n a l f r o m t h e f ir s t l o c a l o s c i ll a t o r in t h e f ir s t
3
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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 ir s t IF . I t s u n w a n t e d s ig n a l i s a t t e n u a t e d b y t h e
c r y s t a l f i lt e r c ir c u i t. A f t e r a m p lif ie d b y I F a m p l if i e r Q 2 5 , t h e s i g n a l i s l e d to I C 2 ,
P i n 2 4 .
T h e s ig n a l i s m i x e d w it h 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 illa t o r in 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 in 3 . T h e o u t p u t s i g n a l is in 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 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 ic 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 la 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 f r o m P in 1 3 a s
t h e A F s i g n a l.
430M Band Rece ver C rcu t
T h e r e c e iv 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 le x e r i s l e d t o t h e a n t e n n a s w i tc h
( D 3 0 3 , D 3 0 4 ) . T h e s ig n a l i s a m p l if i e d b y R F a m p l if ie r Q 3 0 1 . T h e a m p l if ie d s i g n a l
is a m p lif ie d a g a i n b y R F a m p lif ie 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 i s
e lim i n a t e d b y t h e h e l ic a l f i l te r L 3 2 2 , t h e n a m p lif ie 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 im i n a t in 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 lic a l f il t e r L 3 2 3 , t h e s ig n a l
is m ix e d w i t h t h e s ig n a l f r o m t h e f ir s t lo c a l o s c i ll a t o r in 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 ir s t I F . Its u n w a n t e d s ig n a l is a t t e n u a t e d in t h e c r y s t a l f ilt e r
c ir c u i t. A f t e r a m p lif i e d b y IF a m p lif ie r Q 3 2 6 , t h e s ig n a l is 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 i x e d w i th 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 il l a t o r in I C 3 0 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 4 . T h e o u t p u t s ig n a l is i n p u t to
I C 3 0 2 P i n 6 a g a i n a f t e r u n w a n t e d s ig 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 ic f ilt e r . T h e
s i g n a l is l e d t o t h e l im it e r a m p l if i e r IC 3 G 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 d e t e c 
t io n c i r c u i t , 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 in 1 1 a s t h e A F s ig n a l.
144M Band Sub Rece ver C rcu t
T h e r e c e i v e r s ig n a l f r o m t h e a n t e n n a is l e d t o t h e H F R e c e i v e r . A f t e r a m p li f ie d
b y R F a m p l if i e r Q 6 , t h e s i g n a l is in p u t t o t h e H F S u b R e c e i v e r . P a s s i n g t h r o u g h
t h e h i g h - p a s s f ilt e r t o a t t e n u a t e t h e u n w a n t e d s ig n a l , t h e s i g n a l is a m p l if ie d b y R F
a m p l if ie r Q 3 1 5 . T h e a m p lif ie 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 il t e 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 th t h e o s c illa t i n g f r e q u e n c y f r o m U s u b - C O in
t h e f i r s t m ix e r Q 3 1 6 , a n d c o n v e r t e d t o t h e f ir s t I F o f U H F . T h e f i r s t I F is l e d t o
I C 3 0 2 .
430M Band Sub Rece ver C rcu t
T h e r e c e iv 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 U H F R e c e i v e r . A f t e r a m p lif ie d
b y R F a m p lif ie r Q 3 1 0 , t h e s ig n a l is i n p u t t o t h e U H F S u b R e c e iv e r . T h e s ig n a l is
a m p l if i e d a g a i n b y t h e R F a m p l if ie r I C 1 0 a n d le d t o t h e b a n d - p a s s f ilt e 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 t h e s i g n a l is m i x e d w i th t h e o s c i ll a t in g f r e q u e n c y
f r o m s u b U - 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 ir s t I F o f H F . T h e
f ir s t IF is le d t o I C 2 .
S (S gnal) Meter C rcu t
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 IC 2 P in 1 6 is p a s s e d t h r o u g h v a r i a b l e r e g is t e r
R 5 . A f t e r a d d e d t o I C 6 0 1 P in 3 4 , t h e s i g n a l is d i g i t iz e d b y A D c o n v e r t e r a n d
in d ic 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 lt a g e o f IC 3 0 2 P in 1 2 is 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
R 3 0 4 . A f t e r a d d e d t o IC 6 0 1 P i n 3 1 , t h e s ig n a l is d i g it iz e d b y A D c o n v e r t e r a n d
in d ic a t e d o n L C D a s t h e S m e t e r .
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RF Attenuator Circuit
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 is t e r IC 7 P in 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 le x e r , L o w - p a s s f i lt e r a n d A n t e n n a s w it 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 i n p u t to Q 6 t o d e c r e a s e th 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 " is o u t p u t f r o m t h e S h if t R e g i s t e r I C 3 0 5 P in 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 in 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 t h e D u p le x e r , L o w - p a s s f il t e r
a n d A n t e n n a s w it 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 i n p u t t o
Q 3 1 0 t o d e c r e a s e th e in t e r f e r e n c e .
AGC (Auto Ga n Control) C rcu t
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 le 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 in 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 lim b o f t h e D C v o lt a g e f r o m
I C 2 P in 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 )
2) Squelch C rcu t
VHF:
T h e A F s ig n a l o u t p u t fr o m I C 2 P i n 1 2 is i n p u t to P in 1 9 . O n l y t h e n o i s e is a m p l if ie d
b y t h e a c t iv e f ilt e r in ! C 2 , a n d o u t p u t f r o m P in 2 Q , t h e n a m p l if ie d b y t h e N o is e
a m p l if ie r Q 2 7 . T h e a m p l if i e d n o is e i s r e c t i f ie d t o D C v o lt a g e b y D 2 0 a n d i n p u t to
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 in e d b y t h e a n a l o 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 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 lc h R i s s e t t o M I N , a ll o f t h e a n a lo 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 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 lt a g e s a r e
c o m p a r e d in I C 2 . T h e s q u e l c h s ig n a l ( S D ) f r o m P in 2 1 b e c o m e s " L " a n d t h e
s q u e lc h o p e n s .
In c a s e t h a t S q u e lc h R is s e t t o 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 in IC 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 in 2 1 in 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 in I C 2 , t h e S q u e l c h s i g n a l ( S D ) f r o m P in 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
HF:
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 is in p u t to P in 1 3 . O n ly t h e n o is e is a m p li
f ie d b y t h e a c t i v e f ilt 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 lif ie d b y t h e N o i s e
a m p lif ie r Q 3 2 5 . T h e a m p lif ie d n o is e i s r e c t if i e d t o D C v o lt a g e b y D 3 1 5 a n d i n p u t t o
P in 1 5 . T h e v o lt a g e is d e t e r m in e d b y t h e a n a l o g u e s w i tc h I C 3 0 3 d e p e n d i n g o n t h e
p o s it io n o f t h e S q u e l c h R .
In c a s e t h a t S q u e l c h R is s e t to M I N , a ll o f t h e a n a lo g u e s w i tc 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 lt a g e s a r e c o m p a r e d in I C 2 .
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T h e S q u e lc h s ig n a l ( S D ) f r 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 lc h o p e n s .
In c a s e t h a t S q u e l c h R is 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 in I C 9 a r e
t u r n e d O F F , a n d t h e v o lt 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 ta g e a r e c o m 
p a r e d in I C 2 , t h e S q u e lc h s i g n a l ( S D ) f r o m P in 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
Q5 Q6 Q7 Q8
3) Power Supply C rcu t
VHF Power Supply Sw tch C rcu t and Unlock C rcu t
In t h e r e c e iv i n g m o d e , " H " is o u t p u t f r o m P in 4 o f S h i f t R e g is t e r I C 8 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 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 is a d d e d t o
8 R l in e .
In t h e t r a n s m i tt in g m o d e , ju s t s a m e a s r e c e iv in g , " H " i s o u t p u t f r o m P in 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 , t h e n 8 is a d d e d to 8 T li n e .
W h e n P L L is u n l o c k e d , t h e u n lo c k s w i tc h Q 3 8 i s t u r n e d O N b e c a u s e " H " is o u t p u t
f r o m P L L - C O u n i t U L t e r m i n a l . T h e n 8 T s w i t c h 0 3 2 is 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 tin g i s e n a b l e 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 l in e
d o e s n o t w o r k .
UHF Power Supply Sw tch C rcu t and Unlock C rcu t
In t h e r e c e i v in g m o d e , " H " is o u t p u t f r o m P in 4 o f S h i f t R e g is t e r I C 3 0 4 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 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 i s a d d e d t o
8 R l in e .
W h e n t r a n s m i t t in g t h e s i g n a l , j u s t s a m e a s r e c e i v i n g , " H " is o u t p u t f r o m P in 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 is a d d e d t o 8 T li n e .
T h e U n lo c k S w it c h 0 3 3 4 is t u r n e d O N w h e n P L L is u n l o c k e d , b e c a u s e " H " is
o u t p u t f r o m P L L - C O u n i t U L t e r m i n a l, a n d 8 T S w i t c h 0 3 3 3 is t u r n e d O F F .
A c c o r d i n g ly t h e t r a n s m i tt in g is e n a b l e w h e n P L L is u n lo c k e d b e c a u s e 8 T lin e
d o e s n o t w o r k .
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A F S ig n a l C irc u it
VHF FM:
T h e A F s ig n a l o u t p u t f r o m I F u n i t I C 2 P in 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 ic 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 is c i r c u i t ( c o n s i s t in 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 lif i e d b y A F p r e a m p lif ie r Q 3 5 .
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 i s t ic 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 is c i r c u it ( c o n s is 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 is m u t e d in 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 ju s t e d b y e l e c t r o n ic v o l u m e 1C 6 0 5 , a d d e d t o A F p o w e r a m p l if i e r I C 3
P i n 2 a s A O 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 is a m p l if ie d .
VHF AM:
T h e A F s ig 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 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 ic 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 is t in 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 if ie d b y t h e A M a m p lif ie r Q 3 4 .
T h e n t h e s i g n a l is 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 ig n a l o u t p u t f r o m I F u n it 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 ic 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 in 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 lif i e d b y A F p r e a m p l i fi e r Q 3 2 8 .
T h e a m p l if ie d s i g n a l 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 i s 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 is t in 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 is m u t e d b y t h e s u b c o n t r o l u n it , a n d a f t e r th e
s i g n a l is a d j u s t e d b y e le c t r o n ic v o l u m e IC 6 0 5 , a d d e d t o A F p o w e r a m p lif ie r IC 3
P i n 5 a s A O U 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 is a m p l if i e d .
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AF Mute Circuit
W h e n t h e s q u e l c h is c lo s e d d u r in g n o s ig n a l , t w o m u t e s w it 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 ig 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 is m u t e d .
UHF:
W h e n t h e s q u e l c h is 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 tu r n e d O N b y t h e s ig n a l f r o m IC 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 is m u t e d .
Electron c Volume C rcu t
VHF:
T h e m u t e d A F s i g n a l R O i s a d d e d t o t h e e le c t r o n i c v o lu m e I C 6 0 5 P in 3 . T h e
a d d e d s i g n a l is 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 i g n a i i s o u t p u t f r o m P i n 2 . T h e o u t p u t s i g n a l
is a m p l if i e d b y t h e a m p lif ie r Q 6 0 1 a n d a d d e d t o I C 6 0 5 P in 5 a g a i n . T h e s i g 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 ig n a l.
T h e s ig n a l is o u t p u t f r o m P in 6 .
T h e a t t e n u a t i o n l e v e l i s c o n t r o l le d b y t h e s e r ia 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
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 is a d d e d t o t h e e l e c t r o n ic 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 is a t t e n u a t e d in 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 f r o m 0
t o - 6 0 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 i g n a l is o u t p u t f r o m P in 1 5 . T h e o u t p u t
s ig n a l is a m p l if ie d b y t h e a m p l if 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 is a t t e n u a t e d in 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 i g n a l is 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 io n le v e l i s c o n t r o l le 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 a l u e o f 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 l t a g e a n d c o n v e r t e d t o A / D .
Speaker Output Sw tch ng C rcu t
T h e A F s ig n a l s , A O ( 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 tc h I C 5 , a n d m ix e d . T h e s i g n a l is a d d e d t o t h e a u d io p o w e r a m p lif ie r I C 3 P in 5 ,
t h e n a m p lif ie d . In t h i s t im e , t h e v o i c e s o f 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 im u l t a n e o u s l y .
HF:
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2. Transm tter System
1) Modulator C rcu t VHF/UHF
A f t e r t h e v o i c e is c o n v e r t e d in t o t h e e l e c t r ic s i g n a l b y t h e m ic r o p h o n e , t h e s i g n a l is
le d t o t h e m ic r o p h o n e a m p lif ie r I C 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 in g t h e p r e - e m p h a s is c ir c u i t.
T h e a m p l if ie d v o i c e s ig n a l i s 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 lif ie r .
T h e f r e q u e n c y d e v ia t i o n c a n b e a d j u s t e d in R 3 ( H F ) , o r R 3 0 5 ( U H F ) . T h e
s ig n a l is a d d e d t o 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 l a t io n o f H F / U H F .
2) Dr ve/PA Ampl f er C rcu t
VHF
T h e t r a n s m i t t in g s ig n a l f r o m C O o f H F b a n d i s ’ a m p l if i e d b y t h e y o u n g e r a m p l if i 
e r s Q 1 a n d Q 2 , 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 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 if i e d t o t h e d e s ir e d le v e l in I C 1 , is p a s s e d t h r o u g h t h e l o w - p a s s f ilt e r , a n t e n n a
s w it c h , a n d h ig h - p a s s f i lt e r in 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 ir 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 ie d t o t h e a n t e n n a .
UHF:
T h e t r a n s m it t in g s ig n a l f r o m C O o f U H F b a n d is a m p l if ie d b y t h e y o u n g e r a m p l i fi
e r s Q 3 0 1 , Q 3 0 2 a n d Q 3 0 3 , t h e n in 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 in g s i g n a l a m p lif ie d t o t h e d e s i r e d le v e l in IC 3 0 1 is p a s s e d t h r o u g h t h e lo w - p a s s
f il te 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 in 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 ir d h a r m o n i c s e n o u g h , t h e n s u p p lie d t o t h e a n t e n n a .
3) APC C rcu t
VHF:
A p a r t o f t r a n s m i t tin g p o w e r f r o m l o w - p a s s f ilt e 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 io n v o lt 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 lie d t o t h e y o u n g e r a m p l if ie r Q 1 o f H F
a n d t h e p o w e r m o d u l e IC 1 to 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 tt in g p o w e r f r o m l o w - p a s s f i lt e r is 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 . Its 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 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 ls t h e A P C v o lt a g e s u p p li e d t o t h e y o u n g e r a m p l if ie r
Q 3 0 1 o f 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) A r-Cooled Fun Power Control C rcu t
T h e a i r - c o o l e d f u n is 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 is t u r n e d O N ,
Q 3 3 5 is a ls o t u r n e d O N s im 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 i g 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 f r o m I C 3 0 4 P in 7 , Q 3 3 5 is 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 lo w s p e e d .
T h e t e m p e r a t u r e s w it c h T S 1 i s i n 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 i t 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 la y o p e n s , a n d Q 4 0 is t u r n e d O N . A ls o Q 4 ( H F ) a n d
Q 3 0 5 ( U H F ) a r e t u r n e d O F F , a n d t h e u n i t is s e t t o lo w - p o w e r e v e n w h i l e t r a n s m it 
t in g a t H I o r M I D p o w e r .
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1) PLL Synthes zer C rcu t
H F a n d U H F b a n d s h a v e t h e ir o w n u n it s is o l a t e d ly . T h e s u b u n it h a s t h e d u a l
c o n s t r u c t io n c o n s is t i n g o f C O in t h e u p p e r p l a c e a n d P L L in t h e l o w e r p la c e .
B o t h o f t h e s u b u n it s a r e p a c k e d in a h a r d s h ie ld c a s e s o a s n o t to b e in f lu e n c e d
b y t h e c ir 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 is o s c i lla t e d in I C 7 5 1 ( H F ) , t h e o u t p u t i s 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 il l a t i n g f r e q u e n c y i s d i v i d e d in I C 7 5 1 a n d I C 8 5 1 t o g e t t h e
r e f e r e n c e f r 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 i s o n f r e q u e n c y is d i v id e d b y t h e P L L o f p u l s e s w a l lo 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 C O o u t p u t is a m p lif ie d in Q 7 0 3 ( H F ) a n d Q 8 0 3 ( U H F ) . T h e
r e f e r e n c e f r 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 iv id in g X 1 .
3 . P L L C ir c u it
osc BUFF
144MHz PLL-VCO
B ockD agram
Q 7 5 5
THK3-
TXJ
RX
SC
2SK508K52
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2SC4215Y
UN5211 2SC4081
LNT SHIFT
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2SC3324B 2SK880 M56760FP ■*- 2SC4215Y
2SC4081 LNT*2 R R
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B U F F
0 8 5 6
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HKh 2SK508K52 2SC4215Y F UT
UN511L
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430MHz PLL-VCO
B ockD agram
S H IF T
REG IS TE R
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2) - C O C irc u it
S W Q 7 0 4 is 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 il la t e d d i r e c t l y in C o lp it t s
o s c i lla t in g c i r c u i t c o n s i s t in g o f F E T Q 7 5 7 . C O c o n t r o l v o lt 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 la t in g f r e q u e n c y is t u n e d .
S W 2 b e c o m e s " H " w h i le r e c e iv in 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 if t t h e
o s c il la t i n g f r e q u e n c y .
3) V Sub U-VCO C rcu t
S W Q 7 5 5 is 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 il la t e d d i r e c t l y in C o lp i t t s
o s c illa t in g c i r c u i t c o n s is t i n g o f F E T 7 5 7 . 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 i c a p s D 7 5 1 a n d D 7 5 2 , a n d t h e o s c i ll a t i n g f r e q u e n c y is t u n e d .
( Q 7 0 4 is t u 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 illa t i o n i s s t o p p e d . )
4) U-VCO C rcu t
S W Q 8 0 4 is 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 i s o s c illa t e d d ir e c t l y in C o l p i t t s
o s c illa t in g c i r c u it c o n s i s t in g o f F E T Q 8 0 2 . 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 8 0 2 a n d D 8 0 3 , a n d t h e o s c i ll a t in g f r e q u e n c y is t u 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 in 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 it c h
t h e o s c illa t in g f r e q u e n c y .
5) U Sub V-VCO C rcu t
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 ll a t e d d i r e c t ly in C o lp it t s
o s c iiia t in g c i r c u it c o n s i s t in g o f F E T Q 8 5 7 . 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 ll a t in 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 in 4 3 0 M H z b a n d , a n d t h e o s c il la t io n is s t o p p e d . )
6) Sh ft SW (SW1) C rcu t
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 ly , a n d t h e s w it c h
Q 7 5 9 ( H F ) o r Q 8 5 9 ( U H F ) is t u r n e d O N .
T h e c o n s t a n t o f L P F is 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 iv i n g t o t r a n s m i t tin g
is s h o r t e n .
4. Front CPU and Per pheral C rcu t
1) Reset C rcu 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 N , " L " p u l s e o f a b o u t 4 0 m s is o u t p u t f r o m I C 5 0 3
w it h R e s e t F u n c t io n P i n 4 , a n d C P U IC 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 is t u r n e d O F F , t h e d e c r e a s in g o f 5 l in 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 " le v e l .
2) M crophone Key Input C rcu t
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 is t u r n e d O N , " L " le v e l is
in p u t to C P U I C 5 0 1 s i m u l t a n e o u s l y .
3) LCD D splay C rcu t
L C D d is p la y c ir c u it c o n s i s t s o f L C D d r i v e r I C 5 0 2 , i ts p e r i p h e r a l c ir c u i t a n d L C D .
T h e li g h t in g m o d e is d y n a m i c lig h t i n g o f 1 / 3 d u t y a n d 1 /3 b i a s , a n d t h e s e r ia 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 1 ~ 5 o f I C 5 0 1 .
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4) L ght ng and D mmer C rcu t
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 fr 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 lig 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
li g h t in g ( g r e e n ) a r e lit.
W h e n t h e F k e y is 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 ) is
t u r n e d O F F , t h e n " H " is 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 in g
( o r a n g e ) is 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 is 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 it 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 ile
t r a n s m i t 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 tc h is t u r n e d O N , C P U I C 5 0 1 P in 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 lly , 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 is
c o n t r o l le d t o d im t h e L E D D 5 0 1 - D 5 0 8 .
5. Sub CPU and Per pheral C rcu t
1) Reset and Backup C rcu 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 N , " L " p u ls e o f a b o u t 2 0 m s is o u t p u t f r o m IC 6 1 2
( e q u i p p e d w i th R e s e t F u n c t io n ) P i n 4 , a n d C P U IC 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 tu r n e d O F F , t h e d e c r e a s in g o f 5 l in 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 " .
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 is w r it t e n o n E 2 P R O M I C 6 1 0 in t h e B a c k u p M o d e .
2) Beep Sound Output C rcu t
T h e s q u a r e p u l s e is 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 in t h e s i n e w a v e .
3) DTMF Decoder C rcu t
VHF:
A p a r t o f A F s i g n a l ( R A ) f r o m I C 2 P i n 1 2 is c o n t r o l le 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 in 7 .
T h e in p u t s ig n a l i s j u d g e d w h e t h e r a v a i la b l e o r n o t b y t h e s ig n a l j u d g e c ir c u it in
I C 6 0 4 . T h e n t h e ju d g e d s i g n a l is c o n v e r t e d t o 4 - b it 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 is c o n t r o lle d b y C P U I C 6 0 1 t o in p u t t o
r\Tfc jr- - - _ /~*cr\A r\:_~7
u i iv ir u ttu u u w i iv-/u u h r n i / .
T h e i n p u t s ig n a l is ju d g e d w h e t h e r a v a ila b l e o r n o t b y t h e s ig n a l j u d g e c ir c u i t in
I C 6 0 4 . T h e n t h e ju 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 .
4) M crophone Remote Control C rcu t
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 in 7 .
T h e i n p u t s i g n a l is j u d g e d w h e t h e r a v a il 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 ir c u it in
I C 6 0 4 . T h e n t h e ju 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 .
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5) DTMF Encoder C rcu t
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 i n 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 ic h i s a p p li e d f o r t h e D T M F d i a l in 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 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 le r e g i s t e r R 6 0 2 , a m p l i
f ie d b y I C 6 0 8 . T h e a m p l if i e d s i g n a l i s a d d e d t o e a c h v a r ic a p o f C O f o r m o d u la 
t io 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 ir 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 C rcu t
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 it is t u r n e d
O F F , a n d t h e A F s i g n a l i s c o n n e c t e d t o t h e M o d u l a t io n C ir c u i t.
W h e n t h e s q u e lc h o f H F is o p e n e d , t h e A F s ig n a l R O ( H F ) is 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 ig 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 is t e r R 6 0 3 , it is a m p lif ie d b y
I C 6 0 8 . T h e a m p lif ie d m o d u l a t io 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 fo r t h e m o d u la t i o n
o f U H F C O , t h e n U H F e n t e r s in t o t h e t r a n s m i t t 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 ) is 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 ig 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 R 6 0 3 , it is a m p l if ie d b y
I C 6 0 8 . T h e a m p l if ie d m o d u la t io n s i g n a l is 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 la t i o n
o f H F C O , t h e n H F e n t e r s in t o t h e t r a n s m i tt in g m o d e .
7) Tone Burst Output C rcu t
W h i le p r e s s in 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 ls e is o u t p u t f r o m C P U I C 6 0 1 ,
P in 2 7 ( 1 7 5 0 ) , t h e n t h e w a v e is in t e g r a t e d b y C R t o o b t a in 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 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 R 6 0 1 . T h e s ig n a l is
a m p l if 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 i c a p f o r m o d u l a t io n o f C O .
6. CTCSS Tone Encoder C rcu t
1) Reset C rcu t
T h e C P U i s in it i a l iz 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 illa t i o n o f t h e C P U is u n s t a b le ju s t a f t e r t h e p o w e r i s O N .
2) Tone Generat ng C rcu t
T h e m i m ic s i n e w a v e is 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 l a 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 it h in 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 t o T O U T t e r m i n a l .
13
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7 . P a c k e t C ir c u it
1 2 0 0 b p s m o d e i s t h e n o r m a l p a c k e t e q u ip p e d w it h t h e s q u e l c h c o n t r o l .
T h e m o d u la t io 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 if ie d b y
m i c r o p h o n e a m p lif ie r o f I C 5 0 4 , a n d le d t o I D C c ir c u i t, t h e n C O is 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 lc h c o n t r o lle d A F s i g n a l is 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 is 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 io n .
T h e m o d u la t io n s i g n a l is i n 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 is l im it e d in D 5 0 4 ,
Q 6 2 1 , t h e C O is m o d u la t e d d i r e c t ly w i t h o u t p a s s i n g t h e I D C c i r c u i t .
A s f o r t h e r e c e i v in 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 is in p u t t o t h e / 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 / U s e l e c t o r is c o n t r o l le d b y t h e c o n t r o l s ig 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 ip u i io icu iu ur\ i .
1200bps 9600bps
Input level 10mVp-p 2Vp-p
Devaton 3.5+/-0.5kHz 2+/-0.5kHz
Output level 0~5Vrms/8Q
Varable 300mvp-p/47k0
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8) Front CPU I/O Port (IC501)
No. | Pin Ñame Function I I/O I Logic | Description
1PC3/AN11 - -
2A SS GND I-
3TEST -I-
4X2 -0-
5X1 -I-
6 SS GND I-
7 OSC1 OSC1 ISystem clock
8OSC2 OSC2 o System clock
9 RES RES ICPU reset
10 MDO MDO I (Mode terminal)
11 P20/IRQ4/ADTRG FUP IActive Low Microphone up key input
12 P21/UD FDN I Active Low Microphone down key input
13 P22 PTT IActive Low PTT key input
14 P23 FUNC IActive Low Function key input
15 P24 LM IActive Low LM key input
16 P25 SRCH IActive Low Search key input
17 P26 SCAN I Active Low Scan key input
18 P27 TSQ I Active Low TSQ key input
19 P30/SCK1 RPT IActive Low RPT key input
20 P31/SI1 RE I Active Low RE key input
21 P32/S01 CALL IActive Low CALL key input
22 P33/SCK2 MHZ I Active Low MHz key input
23 P34/SI2 MR IActive Low MR key input
24 P35/S02 FO l Active Low FO key input
25 P36/STRB LED1 I Active High Key illumination LED ON
26 P37/CS LED2 l Active High Key illumination while FUNC key is pressed.
27 SS -I--
28 3 3 I-LCD power supply
29 2 2 I-LCD power supply
30 1 1 I-LCD power supply
31 CC -I--
32 PA3/COM4 NC I- -
33 PA2/COM3 COM3 o-LCD common output 3
34 PA1/COM2 COM2 o-LCD common output 2
35 PAO/COM 1 COM1 o -LCD common output 1
36 P50/WKP0/SEG1 NC ---
37 P51/WKP1/SEG2 NC - - -
38 P52/WKP2/SEG3 NC ---
39 P53/WKP3/SEG4 NC - - -
40 P54/WKP4/SEG5 NC - - -
41 P55/WKP5/SEG6 NC ---
42 P56/WKP6/SEG7 NC -- -
43 r57/ vKP7/3EG8 NC -- -
44 P60/SEG9 NC ---
45 P61/SEG10 NC - - -
46 P62/SEG11 NC - - -
47 P63/SEG12 NC ---
48 P64/SEG13 NC ---
49 P65/SEG14 NC - - -
50 P66/SEG15 NC - - -
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No. | Pin Name | Function | I/O I Logic | Description
51 P67/SEG16 NC - - -
52 P70/SEG17 NC -- -
53 P71/SEG18 NC -- -
54 P72/SEG19 NC - - -
55 P73/SEG20 NC - - -
56 P74/SEG21 NC -- -
57 P75/SEG22 NC -- -
58 P76/SEG23 NC -- -
59 P77/SEG24 NC ---
60 P80/SEG25 NC -- -
61 P81/SEG26 NC - - -
62 P82/SEG27 NC -- -
63 P83/SEG28 NC ---
64 P84/SEG29 NC ---
65 P85/SEG30 NC - - -
66 P86/SEG31 NC - - -
67 P87/SEG32 NC - - -
68 P90/SEG33 NC -- -
69 P91/SEG34 NC ---
70 P92/SEG35 NC - - -
71 P93/SEG36 NC -- -
72 P94/SEG37/M MO-LCD driver AC signal
73 P95/SEG38/DO DO O -LCD shift resistor output
74 P96/SEG39/CL2 CL2 o-LCD shift resistor shift signal
75 P97/SEG40/CL1 CL1 0-LCD data latch signal
76 CC -I- -
77 p io /tm ow UPT oActive High TX band display
78 P11/TMOFL UTX 0 Active High TX lamp output
79 P12/TM0FH TX 0 Active High TX lamp output
80 P13/TMIG PT 0 Active High TX band display
81 P14/PWM DIM oActive High L am p d im m er co n trol
82 P15/IRQ1/TMIB PSW IPositive edge Power switch input
83 P16/IRQ2/TMIC ENC1 I Active Low Rotary encoder Up input
84 P17/IRQ3/TMIP ENC2 IActive Low Rotary encoder Down input
85 P40/SCK3 PSWO Active High Front unit 5 power switch
86 P41/RXD RXD I Pulse Serial communication receiving data
87 P42/TXD TXD Pulse Serial communication transmitting data
88 P43/IRQ0 NC I - -
89 A CC GND I -A/D power supply
90 PBO/ANO HF I Active Low HF key
91 PB1/AN1 UHF I Active Low UHF key
92 PB2/AN2 OL IA/D HF volume
93 PB3/AN3 SQ IA/D HF squelch
94 PB4/AN4 U OL I A/D UHF volume
95 PB5/AN5 USQ IA/D UHF squelch
96 PB6/AN6 UP/DN I A/D Relay microphone control input UP/DN
97 PB7/AN7 NC I --
98 PC0/AN8 BP1 IA/D Band plan 1 (destination)
99 PC1/AN9 BP2 IA/D Band plan 2
100 PC2/AN10 BP3 I A/D Band pian 3
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9 ) M a in C P U I/O P o r t (IC 6 0 1 )
No. Pin Name Function I/O Logic Description
1RES RES I - -
2 XTAL OSC1 I-CPU clock 9.8304MHz
3 EXATL OSC2 O -CPU clock 9.8304MHz
4MD1 -I Active High Single chip mode
5 MD2 -IActive High Single chip mode
c
uNMi -i- -
7STBY -I- -
8 CC CC - - -
n
J7 nco/cpi/n
r >jiiyov-/r\u S5v O Active Low 5v power switch output
10 P51/RXD0 RXD I -Serial communication receiving data
11 P50/TXD0 TXD o-Serial communication transmitting data
12 SS - - - -
13 P97/WAIT SCL1 oPulse E2PROM clock
14 P96/ - - - -
15 P95/AS SDA I/O Pulse E2PROM data
16 P94/WR STBE o-Electronic volume strobe
17 P93/RD DATE o-Electronic volume data
18 P92/IRQ0 -I-Power ON interrupt
19 P91/IRQ1 CKE o-Electronic volume/CTCSS clock
20 P90/ADTRG/IRQ2 DAT o-HF side data (PLL, 4094)
21 P60/FTCI STPU oActive High UHF side PLL strobe
22 P61/FTOA STBU oActive High UHF side 4094 strobe
23 P62/FTIA CKU o-UHF side clock (PLL, 4094)
24 P63/FTIB DATU n-I II—IET eiHii /Dl 1 ylHQ/I
II JIUU UUIU L-l_,
25 P64/FTIC STP oActive High HF side PLL strobe
26 P65/FTID STB oActive High HF side 4094 strobe
27 P66/FTOB/IRQ6 1750 nPulse 1750Hz Tone burst signal output
28 P67/IRQ7 CK o-HF side clock (PLL, 4094)
29 A CC - - - -
30 P70/AN0 SDU A/D -UHF side squelch signal
31 P71/AN1 SMU A/D -UHF side S meter signal
32 P72/AN2 ULU A/D -UHF side PLL unlock signal
33 P73/AN3 SD A/D -HF side squelch signal
34 P74/AN4 SM A/D -HF side S meter signal
35 P75/AN5 UL A/D -HF side PLL unlock signal
36 P76/AN6/DA0 PTTS A/D -PTT input terminal for the packet
37 P77/AN7/DA1 - - - -
38 A SS -- - -
39 P40/TMCI0 DTM O Active High DSQ HF side DEC signal (4066 control A)
40 P41/TMOO BEP1
o Pulse 1 side beep sound output
41 P42/TMRI0 DTMU
o Active High DSQ UHF side DEC signal (4066 control B)
42 P43/TMC11 BMU o Active High HF side DTMF ENC monitor mute signal
43 P44/TM01 BEP2 o Pulse 2 side beep sound output
44 P45/TMRI1 BMUU o Active High UHF side DTMF ENC monitor mute signal
45 P46/PW0 SQ D
o Active High HF side squelch signal output
46 P47/PW1 SQUD oActive High UHF side squelch signal output
47 CC - - --
48 P27/A15 XMUT oActive Low Mute signal for cross band repeater
49 P26/A14 MUTU oActive High UHF side AF mute signal (4066 control C)
50 P25/A13 MUT 0 Active High HF side AF mute signal (4066 control C)
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No. Pin Name Function I/O Logic Description
51 P24/A12 STB2 0 Active High UHF side CTCSS strobe signal
52 P23/A11 STB1 0 Active High HF side CTCSS strobe signal
53 P22/A10 TID I Active Low CTCSS unit detection
54 P21/A9 TDU I Active Low UHF side CTCSS tone detection signal
55 P20/A8 TD I Active Low HF side CTCSS tone detection signal
56 SS -- -
57 P17/A7 DD4 I-HF/UHF DTMF DEC data
58 P16/A6 DD3 I-HF/UHF DTMF DEC data
59 P15/A5 DD2 I -HF/UHF DTMF DEC data
60 P14/A4 DD1 I-HF/UHF DTMF DEC data
61 P13/A3 DM4 I-DTMF DEC data for remote control microphone
62 P12/A2 DM3 I -DTMF DEC data for remote control microphone
63 P11/A1 DM2 I -DTMF DEC data for remote control microphone
64 P10/A0 DM1 I-DTMF DEC data for remote control microphone
65 P30/D0 D D I Active High HF/UHF DTMF DEC detection
66 P31/D1 PDD 0 Active High HF/UHF DTMF DEC enable
67 P32/D2 D M IActive High DTMF DEC detection for remote control microphone
68 P33/D3 PDM 0 Active High DTMF DEC enable for remote control microphone
69 P34/D4 DAT1 o-DTMF ENC data
70 P35/D5 DAT2 0 -DTMF ENC data
71 P36/D6 DAT3 0-DTMF ENC data
72 P37/D7 DAT4 o-DTMF ENC data
73 SS - - - -
74 P80 DEE 0 Active High DTMF ENC output enable
75 P81 MMUT oActive High Microphone mute signal
76 P82 MPSW 0 Active High Main power switch output
77 P83 PKT 0 Active High 9600BPS packet mode
78 P84/TXD1/IRQ3 -- - -
79 P85/RXD1/IRQ4 -- - -
80 P86/SCK1/IRQ5 BU I Active Low Back up signal
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S E M I C O N D U C T O R D A T A
1) AN8010M (XA0119)
oltage Regulator
Test C rcu t Block D agram
m □ u
Output Common Input
AN8010M
2) BU4094BF (XA0246)
8-Stage Shift Register
Funct on Table
Clock Output
enable Strobe Data
Parallel outputs Seral outputs
Q1 Qn Qs Q's
LX X ZZ Q7 No Chg.
LX X ZZ Nc Chg. Qs
HL X No Chg. No Chg. Q7 No Chg.
H H L L Qn-1 Q7 No Chg.
HH H H Qn-1 Q7 No Chg.
^—HX X No Chg. No Chg. No Chg. Qs Z=Hgh Impedance
X=Don't Care
Vdd
Enable
Block D agram
Q1 PARALLEL
OUTPUT Q8
19
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3 ) L 7 8 L R 0 5 D ( X A 0 2 8 5 )
oltage Regulator
Block D agram 7 8 L R 0 5
Parameter Symbol Ratngs Unt
Input voltage Vn 7.5-20 V
Output current lout 1-150 mA
Output voltage Vout 5.0 V
(0
Q.
(0
O
>>
3 03
CD
O
4) LA4445 (XA0116)
Audio Power Amplifiers
o
z
o
o
CL
E
fp Oj Oj H- O I— T— i
2o5 J l l c o 2o=>c o o
Q.Q?zmO>OmcL
- (n )B S 1
9 )V C C
Î2 )P ow er Am p GND
8 ) U T 2
BS2
Parameter Symbol Condton Ratngs Unt
!d!e current !cco 75 ma
Voltage gan VG 51.5 dB
Output power Po THD=10% 5.5 W
Total harmoncs dstorton THD
"Ö 0
II
1
0.15 %
Input resstance R 30 kfl
Output nose voltage VNo Rg=0 0.6 mV
Rg=10k£2 1mV
Rpple rejecton rato Rr Rg=0, Vr=200mV, fR = 100Hz 46 dB
Channel separaton ch sep Rg=10kî, Vo=0dBm 55 dB
20
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