Alinco DJ-493 Service Manual
Hide thumbs
Also See for DJ-493:
- Service manual (41 pages) ,
- Instruction manual (19 pages) ,
- Service manual (40 pages)
Table of Contents
Advertisement
Quick Links
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 64076A G 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
11) Transistor, Diode, and LED O ntline D ra w in g s ...........14
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 r V 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
Advertisement
Table of Contents
Related Manuals for Alinco DJ-493
Summary of Contents for Alinco DJ-493
-
Page 1: Table Of Contents
1) G E N E R A L ................2 2) T R A N S M IT T E R ..............2 2) R e a r V 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
SPECIFICATIONS 1) G EN ER AL DJ-493T Frequency coverage 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 DJ-438TA2 TX 450 ~ 469.995MHz RX 450 ~ 469.995MHz... -
Page 3: Circuit Description
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
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
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)
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. 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 CTGSS tone input/DSG code input 5 P63/SCLK22/AN3 Band plan 1 6 P62/SCLK21/AN2 Band plan 2 P61/SOUT2/AN1 DCSW Activ high DCS signal mute P60/SIN2/ANO F/M/KEY...
- Page 8 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 “ P35/SEG23 P34/SEG22 67 ' P33/SEG21 P32/SEG20 69 "...
-
Page 9: Semiconductor Data
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 THD=10% , f= 1 kHz V+=6V, RL=4 V + -4 .5 V , R L -4... -
Page 10: M 5222Fp-600C (Xa0385)
3) M 5222FP-600C (XA0385) Electronic Volume f c - 0 O — ----V W —(e> 7 ^ - ° l=W HI... -
Page 11: Tk 14521M Tl (Xa0515)
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 Symbol Unit Typical No signal Supply Current... -
Page 12: M 64076Agp (Xa0352)
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 Fin 1 6 15 Fin2 > 14 Lock2 Lockl 13 PD2 12 VT2 11 GND VF [10 6) NJM2904V-TE1 (XA0573) Dual Single Supply Operational Amplifier... -
Page 13: 35 0H G -K D -T 1 (Xa0724)
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 Drain Ratings Value Symbol Unit... -
Page 14: Transistor, Diode, And Led Ontline Drawings
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 < x > r- co en o T-t oo n -c io co r*- cn ©... -
Page 15: Exploded View
EXPLODED VIEW 1) Front View KZ0108(DJ-493) \ KZ0098(DJ-496) DJ-493 only... -
Page 16: Rear View
2) Rear View ST0063... -
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 Nam e Ver. R e f No. P a rts No. P a rts Name V er. D J -4 9 3 Main U n it... - Page 18 D J-493 M ain Unit P a rts No. P a rts Name V er. R e f No. P a rts No. P a rts Name V er. R e f No. D J - 4 9 3 M ain U n it D J -4 9 3 M ain U n it C E 0350...
- Page 19 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 V er. D J -4 9 3 M ain U n it D J -4 9 3 Main U n it X C 0072...
- Page 20 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 M ain U n it RK3050...
- Page 21 D J-493 M ain Unit R e f No. Ver. R e f No. P a rts No. P a rts Name 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 R142...
-
Page 22: Mechanical P A R Ts
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. D J -4 9 3 M e c h a n ic a l P a rts D J - 4 9 3 P a ckin g P a rts... -
Page 23: Parts List (Dj-496)
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 M ain U n it CU3031... - Page 24 D J-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 C109...
- Page 25 DJ-496 Main Unit P a rts No. P a rts Name Ver. R ef No. Ver. R e f No. 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 2 S B 7 6 6 A -T X X C 0072...
-
Page 26: Main U N
D J-496 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 6 Main U n it D J -4 9 6 Main U n it RK3050... - Page 27 D J-496 M ain U nit R ef No. P a rts No. P a rts Nam e V e r. R e f No. P a rts Name V er. P a rts No. D J - 4 9 6 M ain U n it D J -4 9 6 M ain U n it...
-
Page 28: Mechanical P A R Ts
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 c h a n ic a l P a rts D J -4 9 6 P acking P a rts... -
Page 29: Adjustment
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: High impedance 3. - Page 30 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 ■ Use an RF cable (3D2W:1m) for test equipment. ■...
-
Page 31: A Djustm Ent M O D
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 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 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 ( PTT) key. An 1750Hz tone burst is automatically sent. 3.
-
Page 35: Pc Board View
PC BOARD VIEW (DJ-493/DJ-496) - Page 36 MAIN SIDE B...
-
Page 39: Block Diagram
M \ r 45.555WH? '.pf AN7 «r* M PF M IXER If AWP Ar AMP 3w C V R Rr AMP 9 pr 5 C5 ------ O-.S i_____ 5'2.13.’.4 <Ji» 1C 4 TKM 52''« -------- i> ---------> “ 1SV3Ö7 tSVJir ’... - Page 40 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 □...