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 yste m .........................................................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 0 0 4 4 )......................................... 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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Summary of Contents for Alinco DJ-493

  • 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

    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 Mode...

  • Page 3: Circuit Description

    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 amplifier (Q 9).

  • Page 4: Transmitter System

    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

    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)

    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 Pin Name Function I/O PU Logic Description 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 DCSW DCS signal mute P60/SIN2/AN0...
  • Page 8 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 " P36/SEG24 65 " P35/SEG23 P33/SEG21 P32/SEG20 69 "...

  • Page 9: Semiconductor Data

    SEMICONDUCTOR DATA 1) NMJ2070MT1 (XA0210) Low Voltage Power Amplifier Equivalent Circuit Param eter Mln. Typ. Max. Unit Condition Symbol 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 0 .3 2...

  • Page 10: M5222Fp-600C (Xa0385)

    3) M5222FP-600C (XA0385) Electronic Volume ! - ----------------------------------------------------------------------------------------n...

  • Page 11: Tk14521Mtl (Xa0515)

    4) TK14521MTL (XA0515) IF System *o ' < < HÉ]— É) Ta = 25°C, Vcc = 3V, fin = 10.7MHz, fm = 1kHz, Mod = ±3kHz Ratings Parameter Symbol Condition Unit Typical Supply Current No signal Mixer + IF part Limiting Sensitivity Limit -100...

  • Page 12: M64076Agp (Xa0352)

    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 15 Fin2 Fin 1 [IT > 14 Lock.2 Lockl [_7_ 13 PD2 PD1 |~8_ VT1 [IT 12 VT2 11 GND VF 10...

  • Page 13: S-81350Hg-Kd-T1 (Xa0724)

    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 Maximum ratines Drain Value Ratings Symbol...

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

    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

    EXPLODED VIEW Front View KZ0108(DJ-493) KZ0098(DJ-496) DJ-493 only...

  • Page 16: Rear V Ie W

    2> R e * r V i e w S t0063...

  • Page 17: Parts List (Dj-493)

    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. D J 493 Mam U n it...
  • Page 18 DJ-493 Main Unit P a rts No. P a rts Name V er. R e f No. R e f No. P a rts No. P a rts Name V er. D J - 4 9 3 M ain U n it D J —...
  • Page 19 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 M ain U n it U J -4 9 3...

  • Page 20: Main U N It

    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 M ain U n it...
  • Page 21 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 — 493 M ain U n it...

  • Page 22: Mechanical P A Rts

    DJ-493 Mechanical and Packing Parts R e f No. P a rts No. P a rts Name V er. P a rts No. P a rts Nam e V er. R e f No. M e c h a n ic a l P a rts D J -4 9 3 D J —...

  • Page 23: Parts List (Dj-496)

    PARTS LIST (DJ-496) DJ-496 Main Unit R ef No. P a rts Name Ver. P a rts No. P a rts Name V er. R e f No. P a rts No. D J — 496 M ain U n it D J - 4 9 6 M ain U n it 6M C M 156 M A T E R...
  • Page 24 DJ-496 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 V er. D J -4 9 6 M ain U n it D J -4 9 6 M ain U n it C E0350...
  • Page 25 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 IVIGIII 'KJ -TyJ\J...

  • Page 26: Main U N It

    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 — 496 Main U n it R K 3050 M C R 0 3 E Z H J 1 03...
  • Page 27 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 . 1 Z Q f i 1 I m t i _ v i n c i i ^ ;...

  • Page 28: Mechanical P A Rts

    DJ-496 Mechanical and Packing Parts Ver. R e f 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 -4 9 6 M e ch a n ica l P a rts D J -4 9 6 P acking P arts A F 0012...

  • Page 29: Adjustment

    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----- ------- — r r • / Supply voltage: 5-14V DC Current:...
  • Page 30 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. Attach a fuse to the RF test equipment.
  • Page 31 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 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 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. Press the F key. The transceiver beeps indicating the new setting has been stored successfully.
  • Page 34 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

    PC BOARD VIEW (DJ-493/DJ-496) MAIN SIDE A O?0: . . D2.1...
  • Page 36 MAIN SIDE B C 5 ! • U ._ U ftl9 3 0 3 4 ( 0 - 0 ] ■ y - - - 0 2 6 ■ .,{Js " o er , » 1 6 9 « Riee -n C I4 8 ;...

  • Page 38: Schematic Diagram

    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

    BLOCK DIAGRAM (DJ-493)
  • Page 40 A N T L O O P F I L T E R 2SC5966 SV31 1 1 0 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 ' ---1 >...
  • Page 41 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 . «1 B U C L O C K S m r 0 3 5 R N ? 1 1 1 ---- 1...

This manual is also suitable for:

Dj-496Dj-438

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