Alinco DJ-493 Service Manual
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Alinco DJ-493 Service Manual

Alinco DJ-493 Service Manual

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DJ-493
Service Manual
CONTENTS
1) G E N E R A L ........................................................................2
2) T R A N S M IT TE R ...............................................................2
3) R E C E IV E R .......................................................................2
1) Receiver S y s te m ........................................................3, 4
2) Transmitter S ystem .........................................................4
3) PLL Synthesizer C irc u it............................................ 4, 5
4) CPU and Peripheral C ircu its .......................... ......... 5, 6
5) M38267M8L252GP (X A 0725).................................. 6 -8
1) NMJ2070M T 1 (XA0210) ...............................................9
2) AT24C16N-10SI-2.7TER (X A0368)............................. 9
3) M5222FP-600C (XA0385) .......................................... 10
4) TK14521MTL (X A 0 5 1 5 )............................................... 11
5) M64076AGP (X A 0 3 5 2 )................................................ 12
6) NJM29Q4V-TE1 (XA0573) .......................................... 12
7) NJM2902V-TE1 (XA0596) .......................................... 12
8) S-81350HG-KD-T1 (XA0724) .................................... 13
9) S-80845ALMP-EA9-T2 (XA0620) ............................. 13
10) 2SK2975 (X E 0038)...................................................... 13
12) LCD Connection (E L 0044 )......................................... 14
MUNGO,
.
inc
1) Front V iew .......................................................................15
2) Rear V ie w .......................................................................16
MAIN U n it................................................................17-21
Mechanical P a rts .......................................................... 22
Packing Parts................................................................. 22
MAIN U n it................................................................23-27
Mechanical P a rts .......................................................... 28
Packing Parts................................................................. 28
1) Required Test Equipm ent......................................29, 30
2) Adjustment M o d e ................................................... 31-3 4
MAIN U n it................................................................ 35, 36
.......................................... 37, 38
.....................................................39, 40

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  • Page 1: Table Of Contents

    1) G E N E R A L ................2 2) Rear V ie w ...............16 2) T R A N S M IT TE R ...............2 PARTS LIST (DJ-493) 3) R E C E IV E R ...............2 CIRCUIT DESCRIPTION MAIN U n it..............17-21...

  • Page 2: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS 1) GENERAL DJ-493T : TX 430 ~ 449.995MHz RX 430 ~ 449.995MHz Frequency coverage E : TX 430 - 439.995MHz RX 430 ~ 439.995MHz TA2 : TX 450 ~ 469.995MHz RX 450 ~ 469.995MHz DJ-496T : TX 430 ~ 449.995MHz RX 430 ~ 449.995MHz E : TX 430 ~ 439.995MHz RX 430 ~ 439.995MHz DJ-438TA2 : TX 450 - 469.995MHz RX 450 ~ 469.995MHz...

  • Page 3: Circuit Description

    All manuals and user guides at all-guides.com CIRCUIT DESCRIPTION 1) Receiver System The receiver system is a double superheterodyne system with a 45.1 M H z first IF and a 455kH z second IF. r » i . r r u n i c n u The received signal at any frequency in the 4 3 0 .0 0 - to 4 4 9 .9 9 5 -M H z range is passed through the low-pass filter (L2, L3, L8, C2, C9, C 1 0, C 1 1, and C 62) and high-pass filter (C 56, C 57, C 6 1 , L25 and D 25), and amplified by the RF...

  • Page 4: Transmitter System

    All manuals and user guides at all-guides.com 5. Squelch Circuit The signal except for the noise component in AF signal of IC4 is cut by the active filter inside 1C. The noise component is amplified and rectified, then converted to the DC voltage to output from pin13 of IC4. The voltage is led to pin 2 of CPU and compared with the setting voltage.

  • Page 5: Cpu And Peripheral Circuits

    All manuals and user guides at all-guides.com 3. Phase Comparator Circuit The PLL (IC2) uses the reference frequency, 5 or 6.25kHz. The phase com­ parator in the IC2 compares the phase of the frequency from the VCO with that of the comparison frequency, 5 or 6.25kHz, which is obtained by the inter­ nal divider in IC2.

  • Page 6: M38267M8L252Gp (Xa0725)

    All manuals and user guides at all-guides.com 6. CTCSS Encoder (67.0 to 250.3 Hz) is output from pin 9 of the CPU to the varicap (D4) of the VCO for modulation. 7. DCS Encoder The CPU (IC9) is equipped with an internal DCS code encoder. The code (023 to 754) is output from pin 9 of the CPU to the varicap (D16) of the PLL refer­...
  • Page 7 All manuals and user guides at all-guides.com Pin Name Description Function I/O PU Logic P67/AN7 S-meter input »/ P66/AN6 Noise level input for squelch P65/AN5 Low battery detection input P64/AN4 CTCSS tone input/DSC code input P63/SCLK22/AN3 Band plan 1 6 P62/SCLK21/AN2 Band plan 2 P61/SOUT2/AN1 Activ high...
  • Page 8 All manuals and user guides at all-guides.com No. I Pin Name Function Logic Description P06/SEG32 AF tons control Activ high P05/SEG31 ~ 5 7 ~ 58 " P04/SEG30 59 " P03/SEG29 60 ' P02/SEG28 P01/SEG27 62 ' P00/SEG26 63 ' P37/SEG25 64 "...

  • Page 9: Semiconductor Data

    All manuals and user guides at all-guides.com SEMICONDUCTOR DATA 1) NMJ2070MT1 (XA0210) Low Voltage Power Amplifier Equivalent Circuit Param eter Condition Symbol Mln. Typ. Max. Unit Supply voltage Idle current O utput voltage 2 .7 Input bias current 2 0 0 T H D = 1 0 % , f=1kH z V + = 6 V , R L=4 V + = 4 .5 V , R U 4...

  • Page 10: M5222Fp-600C (Xa0385)

    All manuals and user guides at all-guides.com 3) M5222FP-600C (XA0385) Electronic Volume ! - ----------------------------------------------------------------------------------------n...

  • Page 11: Tk14521Mtl (Xa0515)

    All manuals and user guides at all-guides.com 4) TK14521MTL (XA0515) IF System *o ' < < HÉ]— É) Ta = 25°C, Vcc = 3V, fin = 10.7MHz, fm = 1kHz, Mod = ±3kHz Ratings Parameter Symbol Unit Condition Typical Supply Current No signal Mixer + IF part Limiting Sensitivity...

  • Page 12: M64076Agp (Xa0352)

    All manuals and user guides at all-guides.com 5) M64076AGP (XA0352) 20 GND XBo 1 19 Xin SI 2 18 Xout CPS 3 17 OP2 r s t 16 OP1 Vcc f5 "si Fin 1 [IT 15 Fin2 > 14 Lock.2 Lockl [_7_ 13 PD2 PD1 |~8_...

  • Page 13: S-81350Hg-Kd-T1 (Xa0724)

    All manuals and user guides at all-guides.com 8) S-81350HG-KD-T1 (XA0724) Top View 2 GND 9) S-80845ALMP-EA9-T2 (XA0620) Voltage Regulator Vin=18V lout= 100mA E A 9 * * Lot n u m b e r — V in V o u t 10) 2SK2975 OCE0038Î...

  • Page 14: Transistor, Diode, And Led Ontline D Raw Ings

    All manuals and user guides at all-guides.com 11) Transistor, D iode, and LED O n tlin e D raw ings Top View 1 O\ i o n î/sn /p i L.WU UUI II ICUUUM ^LLUUHHj o «-< co co t í ” i n <x> r*- co a> o ^ ^ co ^ m co 00 00 CO co ^ i n co r - cd cd <...

  • Page 15: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW Front View KZ0108(DJ-493) KZ0098(DJ-496) DJ-493 only...

  • Page 16: Rear V Ie W

    All manuals and user guides at all-guides.com 2> R e * r V i e w S t0063...

  • Page 17: Parts List (Dj-493)

    All manuals and user guides at all-guides.com PARTS LIST (DJ-493) DJ-493 Main Unit R e f No. P a rts No. P a rts Name Ver. R e f No. P a rts No. P a rts Nam e Ver.
  • Page 18 All manuals and user guides at all-guides.com DJ-493 Main Unit V er. R e f No. P a rts No. P a rts Name R e f No. P a rts No. P a rts Name Ver. D J - 4 9 3 M ain U n it D J —...
  • Page 19 All manuals and user guides at all-guides.com DJ-493 Main Unit R e f No. P a rts No. P a rts Name Ver. R e f No. P a rts No. P a rts Name Ver. D J -4 9 3...
  • Page 20 All manuals and user guides at all-guides.com DJ-493 Main Unit R e f No. P a rts No. P a rts Name V er. P a rts Name V er. R ef No. P a rts No. D J -4 9 3...
  • Page 21 All manuals and user guides at all-guides.com DJ-493 Main Unit Ver. R e f No. P a rts No. P a rts Name Ver. R ef No. P a rts No. P a rts Name ¡j— M ain U n it D J —...

  • Page 22: Mechanical P A Rts

    All manuals and user guides at all-guides.com DJ-493 Mechanical and Packing Parts V er. R e f No. P a rts No. P a rts Name P a rts No. P a rts Nam e V er. R e f No.

  • Page 23: Parts List (Dj-496)

    All manuals and user guides at all-guides.com PARTS LIST (DJ-496) DJ-496 Main Unit Ver. R ef No. P a rts No. P a rts Name V er. R e f No. P a rts No. P a rts Name D J — 496 M ain U n it D J - 4 9 6 M ain U n it...
  • Page 24 All manuals and user guides at all-guides.com DJ-496 Main Unit P a rts No. P a rts Name Ver. R e f No. R e f No. P a rts No. P a rts Name Ver. D J -4 9 6 M ain U n it D J -4 9 6 M ain U n it...
  • Page 25 All manuals and user guides at all-guides.com DJ-496 Main Unit Ver. R ef No. P a rts Name Ver. R e f No. P a rts No. P a rts Name P a rts No. n u /to fi M r » ; « 11r-.;+ D J ~ 49 M 3 ! n U n...
  • Page 26 All manuals and user guides at all-guides.com DJ-496 Main Unit V er. R e f No. P a rts No. P a rts Name Ver. R e f No. P a rts No. P a rts Name D J 496 Main U n it D J —...
  • Page 27 All manuals and user guides at all-guides.com DJ-496 Main Unit R ef No. P a rts No. P a rts Name V er. R e f No. P a rts No. P a rts Name Ver. L J K J H .

  • Page 28: Mechanical P A Rts

    All manuals and user guides at all-guides.com DJ-496 Mechanical and Packing Parts Ver. Ver. P a rts No. P a rts Name R e f No. P a rts No. P a rts Name R e f No. D J -4 9 6 P acking P arts D J -4 9 6 M e ch a n ica l P a rts...

  • Page 29: Adjustment

    All manuals and user guides at all-guides.com ADJUSTMENT 1) Required Test Equipment The following items are required to adjust radio parameters: . R e a u la to H n o w e r s u n n iv ■ ■ ---- a ------------ i----- ------- —...
  • Page 30 All manuals and user guides at all-guides.com 12.Linear detector Measurable frequency: Up to 500MHz Flat Characteristics: 60dB or more Note ■ Standard modulation: 1kHz +/-3.5kHz/DEV ■ Reference sensitivity: 12aB SiNAD Specified audio output leve: 200mW at 8Q Standard audio output level: 50mW at 8D Use an RF cable (3D2W:1 m) for test equipment.
  • Page 31 All manuals and user guides at all-guides.com The DJ-493/496 does not require a serviceperson to manipulate the compo­ nents on the printed-circuit board, except the trimmer when adjusting reference frequency and deviation.Most of the adjustments for the transceiver are made by using the keys on it while the unit is in the adjustment mode.Because the adjust­...
  • Page 32 All manuals and user guides at all-guides.com Reference Frequency Adjustment 1. In the adjustment mode, select channel 1 by rotating the main tuning dial. 2. Press the ( p f T ) key to start transmission. 3. Rotate TC1 on the Main board until the value on the frequency counter matches the one displayed on the LCD.
  • Page 33 All manuals and user guides at all-guides.com S-meter (1) Adjustment 1. In the adjustment mode, select channel 7 by rotating the main tuning dial. The S-meter will show a single circle ( § ) 2. Enter “0”dBu(EMF) with the transceiver tester (SSG). 3.
  • Page 34 All manuals and user guides at all-guides.com Tone Burst Test This function is only for checking the tone burst, not adjusting it. 1. In the adjustment mode, select channel 16 by rotating the main tuning dial. 2. Press the ( P T T ) key. An 1750Hz tone burst is automatically sent. 3.

  • Page 35: Pc Board View

    All manuals and user guides at all-guides.com PC BOARD VIEW (DJ-493/DJ-496) MAIN SIDE A O?0: . . D2.1...
  • Page 36 All manuals and user guides at all-guides.com MAIN SIDE B C 5 ! • U ._ U ftl9 3 0 3 4 ( 0 - 0 ] ■ y - - - 0 2 6 ■ .,{Js " o er , »...
  • Page 37 All manuals and user guides at all-guides.com...

  • Page 38: Schematic Diagram

    All manuals and user guides at all-guides.com SCHEMATIC DIAGRAM (DJ-496) ! 9 tr P 0 i/i [ ¡ j - --“ 3 ,s c it ,j S K ? 0 ( ; 1 L *2 H _ _ ^ b c s p 1 C X 2 U --- A K N 4 9 ;a is is...

  • Page 39: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM (DJ-493)
  • Page 40 All manuals and user guides at all-guides.com A N T L O O P F I L T E R 2SC5966 SV31 1 10 4 *j_BW107_ R O T A Ä V C N C O O E P 0 19 i /? 2S B 7 -T - B R P C 12P '...
  • Page 41 All manuals and user guides at all-guides.com f” > > "Y ™ 012.10 R N l'07 M IC R O C O M P U T E R iv R E G U L A t Q P M 38267M 8L 252GP .

This manual is also suitable for:

Dj-496Dj-438

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