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Alinco DJ-191 Service Manual
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Alinco DJ-191 Service Manual

Alinco DJ-191 Service Manual

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Download this manual See also: Instruction Manual
Service M anual
•SPECIFICATIONS.......................................................2
•C IR C U IT DESCRIPTION............................................3
•SEMICONDUCTOR DATA........................................9
•EXPLO DED VIEW.......................................................15
•A D JU S TM E N T...........................................................21
• P C BOARD VIEW.......................................................26
•C IR C U IT DIAGRAM................................................... 41
• BLOCK DIAGRAM................................................... 45
ALINCO, INC
CONTENTS

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Summary of Contents for Alinco DJ-191

  • Page 1: Table Of Contents

    •C IR C U IT DESCRIPTION..........3 •SEMICONDUCTOR DATA........9 •EXPLO DED VIEW............15 •P A R T S LIS T.............. 18 •A D JU S TM E N T............21 • P C BOARD VIEW............26 •C IR C U IT DIAGRAM........... 41 • BLOCK DIAGRAM........... 45 ALINCO, INC...

  • Page 2: Specifications

    SPECIFICATIONS Frequency Coverage ( u .S . 144.000 ~ 147.995MHz 135.000 ~ 173.995MHz DJ-191T Amateur version) DJ-191E 144.000 ~ 145.995MHz 144.000 ~ 145.995MHz (European Amateur version) 135.000 ~ 155.000MHz 135.000 ~ 173.995MHz D J -191T A 1 (Commercial version VHFL) DJ-191TA2 150.000 ~ 173.995MHz 135.000 ~ 173.995MHz (Commercial version VHFH)

  • Page 3: Circuit Description

    CIRCUIT DESCRIPTION 1) Receiver System The receiver system is a double superheterodyne system with a 21.7 MHz first IF and a 450 kHz second IF. 1. Front End The received signal at any frequency in the 130.00- to 173.995-MHz range is passed through the low-pass filter (L102, L103, L104, C113, C107, C116, and C114) and tuning circuit (L112 and D107), and amplified by the RF amplifier (Q107).
  • Page 4 5. Squelch Circuit Part of the audio signal from pin 9 of IC104 is amplified by the noise filter amplifier consisting of R176, R186, R177, C179, C183, C191, and C194, and the internal noise amplifier in IC104. The desired noise of the signal is output through pin 11 of IC104, to be further amplified by the noise amplifier (Q115).
  • Page 5 Phase Comparator The PLL (IC102) uses the reference frequency, 5 or 6.25 kHz. The phase Circuit comparator in the IC102 compares the phase of the frequency from the VCO with that of the comparison frequency, 5 or 6.25 kHz, which is obtained by the internal divider in IC102.
  • Page 6 4. S(Signal)Meter Circuit The DC potential of pin 13 of IC104 is input to pin 3 of the CPU (IC5), converted from an analog to a digital signal, and displayed as the S-meter signal on the LCD. 5. DTMF Encoder The CPU (IC5) is equipped with an internal DTMF encoder.
  • Page 7 Description Pin Name Signal I/O I Logic LCD power supply P 67/A N 7 S M T S -m e te r input P 66/A N 6 SQ L Noise level input for squelch Low battery detection input P 65/A N 5 P 64/A N 4 Band plan 5 P63/CLK22/AN3...
  • Page 8 Signal I/O Logic Description Pin Name P 15 /S E G 3 9 F/K EY Active low Function key input P 14 /S E G 3 8 P 13/S EG 37 Key matrix input P 12/S EG 36 P 11 /S E G 3 5 P 10 /S E G 3 4 P 07 /S E G 3 3 S F T...

  • Page 9: Semiconductor Data

    SEMICONDUCTOR DATA 1) 24LC16BT-I/SN (XA0351) EEPROM Pin A ssignm ent Block Diagram □ Vss 24LC01B □ 24LC02B 24LC04B □ A 2 C n At r 'r t O D t i L ^ U O D 24LC16B J S D A V s sC 2) LC73881M-TLM (XA0344) DTMF Receiver...
  • Page 10 Block Diagram ■ t O utput signal Bias generating circuit PD Q control circuit High group Frequency detection band pass filter circuit □ INPUT O -------Anti-aliasing Alter Dial tone Alter -<> a c k rtr=*= O ü Shift Low group Frequency detection Timing Ö...
  • Page 11 4) M64076GP (XA0352) PLL Pin Assignment XBo □ 20 □ GND 19 □ Xln CPS n 18 □ Xout RST c 17 □ OP2 16 □ OP1 Vcc c Fin 1 c 15 □ Fin2 Lockl c 14 □ Lock2 13 □...
  • Page 12 7) MC3372VM-EL (XA0343) Narrow Band FM IF IC Block Diagram 8) NJM2070M T1 (XA0210) Audio Power Amplifier (TOP View)
  • Page 13 9) NJM2100M T1 (XA0209) Operational Amplifier Pin A ssignm ent Block Diagram A OUTPUT C 8 □ V* 7 □ B OUTPUT A - INPUT C 2 A +INPUT C 3 6 □ B - INPUT 5 □ B +INPUT (TOP VIEW) 10) Transistor, Diode, and LED Ontline Drawings l op View...
  • Page 15 > <D o ’ > > ro co — co >...

  • Page 16: Exploded View

    EXPLODED VIEW 1) Front View 1...
  • Page 17 FG0173 0P12O3H M B C K O Z A A FG 0185...
  • Page 18 3) Rear View A F0020...

  • Page 19: Parts List

    PARTS LIST Rel. RôÎ- D o ric IJi-i Ref. P a ris No. D e s c rip tio n P a rts N am e Ver. P a rts No. D e s c rip tio n P a rts Name V er.
  • Page 20 CPU U nit/C H A R G E U n it/M e c h a n ica l Parts Ref. R e f. Parts No. D e s c rip tio n P a rts M am e Ver. P a r ts N o. D e s c r ip t io n P a r ts N a m e V e r.
  • Page 21 M echanical P a rts /P T T U n it/J A C K U n it/V C O U n it/S W U nit Ret. Ret. Parts No. Description Parts Name Ver. Parts No. Description Parts Name Ver. FGÜ177 V C O U nit V/U Key DJG5 FG0182...
  • Page 22 R P " Unit Ret. Parts No. Description Ref. Parts Name Ver. Parts No. Description Parts Name Ver. Unit C165 CU3Û21 Ch P C1G08CI11IIG80JTA C101 C16G CU3059 Ch P CU3035 Chip C Cl 608 JB1II10 2KTA C1608JF1E1C4ZTA CIB7 C102 Chip C CU3016 Ch P CU3035...
  • Page 23 R I? U í Bet. Ref. P a rts No. D e sc rip tio n P a r t s N a m e Ver. P a rts No. D e s c rip tio n P a r t s N a m e N o.
  • Page 24 RF U N IT/E J-28U Ref. Parts No. Ref. Description Parts Name Ver. Parts No. Description Parts Name Ver. R205 RK3030 Chip R ERJ3GSYJ221V EJ-28U R20S RK3059 C hip R ERJ3GSYJ563V CU 3015 C701 C 1 6 0 8 C H 1 H 2 2 0 JT A R209 RK3026 C hip R...

  • Page 25: Adjustment

    ADJUSTMENT 1) Required Test Equipment The following items are required to adjust radio parameters: 1. Regulated power Supply voltage: 5 - 1 4 VDC Current: 3 A or more supply 2. Digital multimeter Voltage range: FS = Approx. 20 V Current: 10A or more Input resistance:...
  • Page 26 The D J- 191 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.
  • Page 27 In the adjustment mode, select channel 1 by rotating the main tuning Reference Frequency dial. Adjustment Press the ( PTT ) key to start transmission. Rotate TC101 on the RF circuit board until the value on the frequency counter matches the one displayed on the LCD. On 145.05MHz measure TP near the VCO and adjust L301 to obtain 1.1V ±...
  • Page 28 S-meter (1) Adjustment In the adjustment mode, select channel 7 by rotating the main tuning dial. The S-meter will show a single star ( ★ ) . Enter “0" dB (EMF) with the transceiver tester. Press the key. The transceiver beeps indicating the new (DO W N) setting has been stored successfully.
  • Page 29 Tone 250.3 Hz Test In the adjustment mode, select channel 14 by rotating the main tuning dial. Press the ( ) key. A 250.3 Hz tone is automatically sent. P T T Check the deviation with the transceiver tester. Tone Burst Test This function is only for checking the tone burst, not adjusting it.

  • Page 30: Pc Board View

    PC BOARD VIEW CPU Unit Side A (VALUE)
  • Page 32 CPU Unit Side B C TO U R 0 0 1 8 (VALUE) ^ L - T Û ^ P â 'c , • HUB y i j p . n « u " " J 7 " R 7 9 R 84 R 1 0 0 8 JPMPER...
  • Page 33 ( / )
  • Page 34 RF Unit Side A (VALUE/REFERENCE)
  • Page 36 (REFERENCE)
  • Page 37 SW Unit Side A (REFERENCE) (VALUE) S i} 5 0 2 SW Unit Side B (REFERENCE) (VALUE) 6B E 7 B -0 3 Z 0 0 3 -*...
  • Page 38 PTT Unit Side A (VALUE) (REFERENCE) PTT Unit Side B (VALUE) (REFERENCE)
  • Page 39 VCO Unit Side A (VALUE) (REFERENCE) . I '1 0 0 3 0 U T 0 0 3 0 \ C 3 0 8 3E 2Ï 5 P [ [ o I I 4 7 / 4 V I '.U3>0¡< sa_.
  • Page 40 JACK Unit Side A (VALUE) (REFERENCE) JACK Unit Side B (VALUE) (REFERENCE) b 1 ack...
  • Page 41 T P 0 0 17PB02 TPB03 7P808 CHARGE Unit Side A (VALUE / REFERENCE) :® Q ) :■ " » p f c ] T T T .D 8 0 2 : . i l ju2FVJ4 4N CHARG E Unit Side B (V A L U E /R E F E R E N C E ) TSQ UNIT Side A (REFERENCE)

  • Page 42: Circuit Diagram

    CIRCUIT DIAGRAM PTT UNIT SW402 SO P-112HST VCO UNIT...
  • Page 43 SW UNIT SW501 ------- — 0 ° --------- 03 2003 SO P-112HST K I4 K 0 1 K 0 3 SW502 — n _ --------------- 0 o--------- SO P -112H ST SP-JAC K UNIT JK901 HSJ1 493—01 - L902 — L901 -'T'- 1u CN901...
  • Page 44 ^ ■ ■ i i t n v U H M M b t U IM II JK801 HEC2781 -0 1 0 0 2 0 13.8V TSQ UNIT X 701 3 .6 8 6 4 M H z ;— i — ^ □...
  • Page 45 RF UNIT R X : 1 4 5 M H z O F F V O L L E V E L 1 T X : 1 4 5 M H z L O W P O W E R ( BlSTXSf TO CPU BOARD...
  • Page 46 < S > <S>...
  • Page 47 I"" 4 5 0 K H ’ üh AF PQWER AMP AMT SW < - -r> -r> — f> -r> -r> -r> -r> D193 0 1 0 1 .1 3 2 0 1 * 7 0 1 0 7 0 1 0 4 ,1 0 5 .1 0 5 0 1 0 5 0 1 0 5 IC T 04...