Alinco Dj-180, Dj-1400 Service Manual

DJ-180  
DJ-1400
Service Manual
CONTENTS
SPECIFICATIONS PC BOARD VIEW
   1) General 2    1) VCO Unit 24
   2) Transmitter. 2    2) JACK Unit 24
   3) Receiver 2    3) PTT Unit Side B 24
   4) Functions for Each Version 3    4) PS Unit 25
CIRCUIT DESCRIPTION    5) ROM1 Unit Side B 25
   1) Receiver System 4    6) ROM2 Unit Side B 25
   2) PLL VCO Circuit. 5    7) RF Unit Side A 26
   3) Transmitter System 5    8) RF Unit Side B 27
   4) DTMF Encoder Circuit (option). 6    9) CPU Unit Side A. 28
   5) Tone...

SPECIFICATIONS
DJ-180
1) General
  Frequency Coverage:
RX: 137.000 ~ 173.995MHz (T, TM version)
TX: 144.000 ~ 147.995MHz (T, TM version)
RX: 137.000 ~ 173.995MHz (TA, TB, TA2, TB2 version)
TX: 137.000 ~ 173.995MHz (TA, TB, TA2, TB2 version)
RX/TX: 144.000~145.995MHz(TS, TSA, TZ, E, EA, EB version)
  Frequency Resolution: 5, 10, 12.5, 15, 20, 25kHz steps
  Memory Channels: 10 Channels (standard)
  Antenna Impedance: 50 ohm unbalanced
  Signal Type: F3E(FM)
  Power Supply Requirement
:DC 5.5V~13.8V (Rated...

SPECIFICATIONS
DJ-1400QN / AN (The Narrow Version)
1) General
  Frequency Coverage:
136.000 ~ 155.000MHz (AN version)
150.000 ~ 173.995MHz (QN version)
  Frequency Resolution: 5, 10, 12.5, 15, 20, 25kHz steps
  Memory Channels: 10 Channels (standard)/option 50 and 200ch
  Antenna Impedance: 50 ohm unbalanced
  Signal Type: F3E(FM)
  Power Supply Requirement
:DC 5.5V~13.8V (Rated 7.2V Ni-Cd)
  Dimensions: Approximately 132(H) x 58(W) x 33(D) mm
  Weight : Approximately 350g
2) Transmitter
  Output Power.I...

4) Functions for Each Version
RX
Frequency
RangeTX
Frequency
Range(factoTone
Burst CTCSS DTMF BANDFinal
Operatio
n
DJ-180T 130~174 144~148 x O O R+LA
DJ-180TA 130~174 130~174 x O O R+LA
DJ-180TA2 130~174 130~174 x O O H R+LA
DJ-180TB 130~174 130~174 x O O R+LA
DJ-180TB2 130~174 130~174 x O O H R+LA
DJ-180TM 130~174 144~148 x O O R+LA
DJ-180TS 144~146 144~146 x O O R
DJ-180TSA 144~146 144~146 x O O R
DJ-180TZ 144~146 144~146 x O x
(with16keys)R
DJ-180E 144~146 144~148 O A
(option)OR
DJ-180EA 144~146...

CIRCUIT DESCRIPTION
1) Receiver System
The receiver system is the double superheterodyne.
The first IF is 21.4MHz andthe second IF is 455kHz.
 1. Front End The signal from the antenna is passed through a low-pass fitter and input to
the RF coil L4.
The signal trom L4 is amplified by Q1 and led to the band passtilter (L5, L6,
L7), and led to the first mixer gate of Q2.
 2. First Mixer The amplified signal (fo) by Q1 is mixed with the first local oscillator signal
(fo -21.4MHz) from the PLL circuit by the...

2) PLL, VCO Circuit
Output frequency of PLL circuit is set by the serial data (pin9: clock, pin10:
data, pin11 : toad enable) from microprocessor.
PLL circuit consists of VCO Q201, buffer amplifier Q202 and Q17.
When PLL is locked, pin7 of IC2 goesto high and UNLOCK SW Q19
becomes OFF, then T.MUTE signal goes to low.
The pulse wave output of charge pump is converted to DC voltage by PLL
loop filter circuit, and supplied to D201 , D202 of varicap diode in VCO unit.
The VCO tune voltage is applied to the...

4) DTMF Encoder Circuit (option)
The DTMF signal corresponding to the combination of the column and row is
output from tone output pin17 of IC401 Encoder, producing a frequency-
modulated RF output. The Q401 switches the DTMF Encoder when lC401 is
active during DTMF transmission.
5) Tone Squelch Circuit (option)
 1.Decoder
The second IF signalfrom pin11 of IC1, and input to the tone squelch
decoder lC701.
When the tone squelch decoder IC701 decodes the input tone signal fre-
quency as the programmed...

7) Terminal Function of Microprocesser
Name I/O Description PinNo. PinName H L
TBST O 1750Hz Tone Burst Output 9 P57/PWM3Normal:H(HiZ) Output:Pluse
BEEP O Beep Tone Output 10 P56/PWM2 Normal:H(HiZ) Output:Pluse
R5C O RX5V ON/OFF 11 P55/PWM1 ON OFF
T5C O TX5V ON/OFF 12 P54/PWM0 ON OFF
AFP O AF Power Amplifier ON/OFF 13 P53/SIG ON OFF
AFC O IF Mute Output 14 P52/CNT2 Mute OFF Mute ON
M.MUTE O Microphone Mute Output 15 P5l/CNT1during Tone Burst
Tansmission Normal
RE1 I Rotary Encoder Input 1 16 P50/INT3...