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Alinco DJ-493 Service Manual

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DJ-493
DJ-496/438
Service Manual
CONTENTS
1) G E N E R A L .............................................................................2
2) T R A N S M IT T E R ................................................................... 2
3) R E C E IV E R ............................................................................2
1) R eceiver S y s te m ............................................................3, 4
2) T ransm itter S y s te m ............................................................. 4
3) PLL S ynth esize r C ir c u it............................................... 4, 5
4) CPU and Peripheral C irc u its ............................ .......... 5,
5) M 38267M 8L252G P (X A 0 7 2 5 ).....................................
1) N M J2070M T 1 (X A 0210) .................................................. 9
2) A T 24 C 16 N -10S I-2.7TE R (X A 0 3 6 8 )................................9
3) M 5222FP -600C (XA0385) ............................................. 10
4) T K 14 521 M T L (X A 0 5 1 5 ).................................................. 11
5) M 64076AG P (X A 0 3 5 2 )................................................... 12
) NJM 2904V-TE1 (XA0573) ............................................. 12
6
7) NJM2902V-TE1 (XA0596) ............................................. 12
) S -81 35 0H G -K D -T 1 (XA0724) ....................................... 13
8
9) S -80845A LM P -E A 9-T 2 (XA0620) ................................ 13
10) 2S K 2975 (X E 0 0 3 8 )........................................................... 13
12) LC D C onnection (E L 0 0 4 4 )............................................ 14
SNCO,
6
6 - 8
.
in c
1) Front V ie w ............................................................................15
2) R e a rV ie w ............................................................................16
MAIN U n it .................................................................... 17-21
Mechanical P a r ts .............................................................. 22
Packing P a rts ......................................................................22
MAIN U n it.....................................................................2 3 -2 7
Mechanical P a r ts ...............................................................28
Packing P a rts ......................................................................28
1) Required Test E q u ip m e n t........................................ 29, 30
2) A djustm ent M o d e ....................................................... 3 1 -3 4
MAIN U n it.....................................................................35, 36
............................................. 37, 38
........................................................ 39, 40

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  • Page 1: Table Of Contents

    1) Front V ie w ................15 2) T R A N S M IT T E R ..............2 2) R e a rV ie w ................16 PARTS LIST (DJ-493) 3) R E C E IV E R ................2 CIRCUIT DESCRIPTION MAIN U n it ..............

  • Page 2: Specifications

    All manuals and user guides at all-guides.com SPECIFICATIONS 1) G EN ER AL Frequency coverage DJ-493T TX 430 ~ 449.995MHz RX 430 ~ 449.995MHz TX 430 - 439.995MHz RX 430 ~ 439.995MHz TX 450 ~ 469.995MHz RX 450 ~ 469.995MHz DJ-496T TX 430 ~ 449.995MHz RX 430 ~ 449.995MHz TX 430 ~ 439.995MHz RX 430 ~ 439.995MHz...

  • 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 MHz first IF and a 455kHz second IF. 1. Front End The received signal at any frequency in the 430.00- to 449.995-MHz range is passed through the low-pass filter (L2, L3, L8, C2, C9, C10, C11, and C62) and high-pass filter (C56, C57, C61, L25 and D25), and amplified by the RF amplifier (Q9).

  • Page 4: Transm Itter System

    All manuals and user guides at all-guides.com 5. Squelch Circuit The signal except for the noise component in AF signal of 104 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: M 38267M 8L252G P (Xa0725)

    All manuals and user guides at all-guides.com 6. CTCSS Encoder The CPU (IC9) is equipped with an internal tone encoder. The tone signal (67.0 to 250.3 Hz) is output from pin 9 of the CPU to the varicap (D4) of the 7.

  • Page 7: Main U N

    All manuals and user guides at all-guides.com 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 CTGSS tone input/DSG code input 5 P63/SCLK22/AN3 Band plan 1 6 P62/SCLK21/AN2 Band plan 2 P61/SOUT2/AN1 DCSW...
  • Page 8 All manuals and user guides at all-guides.com Pin Name Function Logic Description P06/SEG32 Activ high AF tone control l i e T 57 ' P05/SEG31 58 " P04/SEG30 59 " P03/SEG29 P02/SEG28 P01/SEG27 62 ' P00/S EG26 P37/SEG25 64 " P36/SEG24 65 “...

  • Page 9: Semiconductor Data

    All manuals and user guides at all-guides.com SEMICONDUCTOR DATA NM J2070M T1 (XA0210) Low Voltage Power Amplifier Equivalent Circuit V + = V, T a = 2 5 ± 2 ‘C Parameter Condition Min. Typ. Max. Symbol Unit Supply voltage Idle current O utput voltage Input bias current...

  • Page 10: M 5222Fp-600C (Xa0385)

    All manuals and user guides at all-guides.com 3) M 5222FP-600C (XA0385) Electronic Volume f c - 0 O — ----V W —(e> 7 ^ - ° l=W HI...

  • Page 11: Tk 14521M Tl (Xa0515)

    All manuals and user guides at all-guides.com 4) TK 14521M TL (XA0515) IF System ¿ 5 c o x > « < < Û Ô ç > Ta = 25°C, Vcc = 3V, fin = 10.7MHz, fm = 1kHz, Mod = ±3kHz Ratings Condition Parameter...

  • Page 12: M 64076Agp (Xa0352)

    All manuals and user guides at all-guides.com 5) M 64076AGP (XA0352) XBo 1 20 GND SI 2 19 Xin CPS 3 18 Xout RST 4 17 OP2 a> Vcc b 16 OP1 15 Fin2 Fin 1 6 > 14 Lock2 Lockl 13 PD2 12 VT2...

  • Page 13: 35 0H G -K D -T 1 (Xa0724)

    All manuals and user guides at all-guides.com 8) S-81350H G -K D -T1 (XA0724) Top View VOUT m z r u 9) S-80845ALM P-EA9-T2 (XA0620) Voltage Regulator Vin=18V lout= 100mA E A 9 * * Lot number o u t 10) 2SK2975 OCE0038) Maximum ratings Value...

  • Page 14: Transistor, Diode, And Led Ontline Drawings

    All manuals and user guides at all-guides.com 11) Transistor, Diode, and LED Ontline Drawings Top View 1 o\ / C i r \ n LCD Connection ' <-) ^ L L U U 4 4 j o ^ c\i co <...

  • Page 15: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW 1) Front View KZ0108(DJ-493) \ KZ0098(DJ-496) DJ-493 only...

  • Page 16: Rear View

    All manuals and user guides at all-guides.com 2) Rear View ST0063...

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

  • Page 22: Mechanical P A R Ts

    All manuals and user guides at all-guides.com D J-4 93 M echanical and Packing Parts 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 Nam e V er.

  • Page 23: Parts List (Dj-496)

    All manuals and user guides at all-guides.com PARTS LIST (DJ-496) DJ-496 Main Unit R e f 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 -4 9 6 M ain U n it D J -4 9 6...
  • Page 24 All manuals and user guides at all-guides.com D J-496 Main Unit P a rts No. P a rts Name R e f No. Ver. 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. Ver. R e f No. P a rts No. P a rts Name P a rts No. P a rts Name D J -4 9 6 Main U n it D J -4 9 6 Main U n it...
  • Page 26 All manuals and user guides at all-guides.com D J-496 M ain 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 Main U n it D J -4 9 6 Main U n it...
  • Page 27 All manuals and user guides at all-guides.com D J-496 M ain U nit R ef No. P a rts Nam e P a rts No. V e r. R e f No. P a rts No. P a rts Name V er.

  • Page 28: Mechanical P A R Ts

    All manuals and user guides at all-guides.com D J-4 96 M echanical and Packing Parts R e f No. P a rts No. P a rts Name V er. R e f No. Ver. 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...

  • Page 29: Adjustment

    All manuals and user guides at all-guides.com ADJUSTMENT 1) Required Test Equipm ent The following items are required to adjust radio parameters: 1. Regulated power supply Supply voltage: 5-14V DC Current: 3A or more 2. Digital multimeter Voltage range: FS= Approx. 20V Current: 10A or more Input resistance:...
  • Page 30 All manuals and user guides at all-guides.com 12.Linear detector Measurable frequency: Up to 500MHz Characteristics: Flat 60dB or more Note ■ Standard modulation: 1kHz +/-3.5kHz/DEV ■ Reference sensitivity: 12dB SINAD ■ Specified audio output leve: 200mW at 8Q ■ Standard audio output level: 50mW at 8ft ■...

  • Page 31: A Djustm Ent M O D

    All manuals and user guides at all-guides.com 2) Adjustment Mode 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 ( PTT ) 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 ( PTT) 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)
  • Page 36 All manuals and user guides at all-guides.com MAIN SIDE B...

  • Page 37: Schematic Diagram

    All manuals and user guides at all-guides.com...
  • Page 38 All manuals and user guides at all-guides.com...

  • Page 39: Block Diagram

    All manuals and user guides at all-guides.com M \ r 45.555WH? '.pf AN7 «r* M PF M IXER If AWP Ar AMP 3w C VR Rr AMP 9 pr 5 C5 ------ O-.S i _ ____ 5'2.13.’.4 <Ji» 1C 4 TKM 52''« -------- i>...
  • Page 40 All manuals and user guides at all-guides.com A N T □ □ □ R E C E I V E 0 0 0 □ T R A N S M I T 0 0 0 □ R E C E I V E / T R A N S M I T □...

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Dj-496Dj-438

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