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

2) Transmitter System

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

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

(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

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

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

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

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

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

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

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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

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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

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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

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Po - P i Po - V c c 1

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Output Power Po (W)

CO

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Output terminal

Final DC supply

terminal

2nd stage DC supply terminal

1st stage DC

supply terminal

Input terminal

Fin(Ground)

c n

GO

C D

I 1

—k

a

(400mW)

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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

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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 ..............................................

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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

dBm

13) S-AV17 (XA0185)

144 ~148MHz 60W

RF Power Module

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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

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4 m it y

5

4

4 CONT

OUT X

Q I—

Q =>

C 1

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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

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c n CO T |

4

8

/

chO

6

ch1

5