Alinco DJ-S40T/E Service Manual

DJ-S40T / E
Service Manual
CONTENTS
SPECIFICATIONS
1) GENERAL................................................................ 2
2) TRANSMITTER........................................................ 2
3) RECEIVER............................................................... 2
CIRCUIT DESCRIPTION
1) Receiver system ....................................................... 3
2) Terminalmitter system............................................... 4
3) PLL, VCO...

2
SPECIFICATIONS
1) GENERAL
Frequency coverage T : TX 430 ~ 449.995MHz  RX 410 ~ 470MHz
E : TX 430 ~ 439.995MHz  RX 430 ~ 439.995MHz
TA : TX 410 ~ 470MHz  RX 410 ~ 470MHz
Mode F3E (FM)
Channel steps 5, 10, 12.5, 15, 20, 25, 30 & 50kHz
Memory channels 99 channels+1 CALL channel
Antenna connector SMA (50Ω unbalanced)
Frequency stability ±5 ppm
Microphone impedance 2kΩ nominal
Power supply 4.5 ~ 16.0V DC (EXT.termonai)
3.6 ~ 16.0V DC (BATT terminal)
Current 600mA (typical) Transmit high at 1W
150mA...

3
CIRCUIT DESCRIPTION
1) Receiver System
     The receiver system is a double superheterodyne system with a 21.7MHz first IF and
     a 450kHz second IF.
1. Front End
     The signal from the anntena is pssed through low-pass filter and input to RF coil L24
     and L17(band pass filter).
     The signal from L24 and L17 is amplified by Q9,Q10 and led to the band pass filter,
     and let to the first mixer base of Q11.
2. First Mixer
     The amplified signal (f0) by Q9,Q10 is mixed eith the first local...

4
2)Transmitter System
  1.Microphone Amplifier
       The input signal from built-in or external microphone is led to the microphone mute
       circuit Q15,pre-emphasis circuit ,IDC circuit IC4,the signal is input to the maximum
       deviation adjustment volume VR2.Then mixed at the add VR2 with the CTCSS tone
       signal which is generated by CPU,Then it is input to VCO as the modulation signal.
  2.Power Amplifier
      The signal from VCO is amplified by IC1 and then passed through the low-pass...

5
4) M38224M6M
CPU
Terminal Connection
(TOP VIEW) 

6
Terminal function of CPU
No. Pin Name Function I/O LogicDescriptionNo. Pin Name Function I/O LogicDescription1 P67 SQL I A/DNoise level input for squelch2 P66 KEY I A/DKey input ( , ,V/M)3 P65 VOX O Activ highPower cont.4 P64 EXTDC I A/DExt voltage input 5 P63 BP1 I A/DBand plan 16 P62 TIN I A/DCTCSS tone input7 P61 SMT I A/DS-meter input8 P60 BATT I A/DBatt voltage input9 P57 AFP O Activ lowAudio Amp ON/OFF10 P56 BEEP I/O PulseBeep sound out11 P55 AFS O Activ highAudio signal ON/OFF12 CNTR0 TBST I/O...

7
SEMICONDUCTOR DATA
1) M64082AGP (XA0543)
DUAL PLL FREQUENCY SYNTHESIZER
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
M64082AGP
SIXin
Xout
GND
CONT
Fin2 Vcc
PD1 RST CPS
Lock
XBo
Vss
PD2 Vc1
Fin1
1121413
9
10
8
7
15
16
11
6
2
3
45
Vcc Fin1CONT
Xin XoutXBo
SI
RST CPS
Fin2GND Vc1
PD2
Vss Lock
PD1
Programmable divider
for local oscillator 1
Data latch (17 bits)
latch
Phase
comparator
21 pulse counter OSC
1/2 divider1/4 divider
through
2-modulus
prescaler
(1/128, 1/129)
2-modulus
prescaler
(1/128, 1/129)
Shift...

8
2) NJM2070MT1 (XA210)
Low Voltage  Power  Amplifier
Equivalent Circuit
3) NJM2904V-TE1 (XA0573) 

9
4) NJM2902V-TE1 (XA0596)
Quad Single Supply Operational Amplifier
5) TA31136FN (XA0404)
Low Power FM IF 

10
6) UPC2771T(XA0545)
Terminal Connection
(Top View)
C2H
3
2
14
5
61: INPUT
2: GND
3: GND
4: OUTPUT
5: GND
6: Vcc
7) CAT24WC16JITE13 (XA0855)
A0
A1
A2
Vss SDASCL WP VccName
Function
VssGround A0..A2User Configurable Chip Selects
SDASerial Address/Data I/O
SCLSerial Clock
WP Write Protect Input
Vcc
2.5V~6.0V Power Supply
PDIP
8) S-816A30AMC (XA0848)
41
3
25
OUT
R 
= 0.3Ω IN
CL EXT
INV
ON/OFFOUTV
SSV
S-816A
~SOT-23-5
Top view
1 54
23
 MC