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Instruction Manual
DJ-190
CONTENTS
+SPECIFICATIONS
+CIRCUIT DESCRIPTION
+SEMICONDUCTOR DATA
+EXPLODED VIEW
+PARTS LIST
+ADJUSTMENT
+PCBOARD VIEW
+CIRCUIT DIAGRAM
+BLOCK DIAGRAM
Service Manual
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ALINCO INCORPORATED
TWIN 21 M.I.D. TOWER BUILDING 23F, 1-61, 2-CHOME,
SHIROMI CHUO-KU , OSAKA, 540-8580 JAPAN
Tel (81)6-6946-8150 fax (81)6-6946-8175
e-mail: export@alinco.co.jp
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Summary of Contents for Alinco DJ-190
- Page 1 DJ-190 Service Manual CONTENTS +SPECIFICATIONS +CIRCUIT DESCRIPTION +SEMICONDUCTOR DATA +EXPLODED VIEW +PARTS LIST +ADJUSTMENT +PCBOARD VIEW +CIRCUIT DIAGRAM +BLOCK DIAGRAM ALINCO INCORPORATED TWIN 21 M.I.D. TOWER BUILDING 23F, 1-61, 2-CHOME, SHIROMI CHUO-KU , OSAKA, 540-8580 JAPAN Tel (81)6-6946-8150 fax (81)6-6946-8175...
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Page 2: Specifications
SPECIFICATIONS Frequency Coverage DJ-190T (u.s. Amateur version) 144.000 ~ 147.995MHz 135.000 ~ 173.995MHz DJ-190E (European Amateur version) 144.000 ~ 145.995MHz 144.000 ~ 145.995MHz DJ-190TA1 (commercial version VHFL) 135.000 ~ 155.000MHz 135.000 ~ 173.995MHz DJ-190TA2 (commercial version VHFH) 150.000 ~ 173.995MHz 135.000 ~ 173.995MHz Channel Step: 5, 10, 12.5, 15, 20, 25, 30kHzsteps Memory Channels:... -
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 a450 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 2) Transmitter System The audio signal is converted to an electric signal in either the internal or 1. Modulator Circuit external microphone, and input to the microphone amplifier (IC6). IC6 consists of two operational amplifiers; one amplifier (pins 1, 2, and 3) is composed of pre-emphasis and IDC circuits and the other (pins 5, 6, and 7) is composed of a splatter filter.
- Page 5 5. VCO Circuit A Colpitts oscillation circuit driven by Q301 directly oscillates the desired frequency. The frequency control voltage determined in the CPU (IC5) and PLL circuit is input to the varicaps (D301 and D304). This changes the oscillation frequency, which is amplified by the VCO buffer (Q302) and output from the VCO unit.
- Page 6 5) CPU Terminal Functions: M38267M8L (XA413) Page-6...
- Page 20 ADJUSTMENT 1) Required Test Equipment The following items are required to adjust radio parameters: 1. Regulated power Supply voltage:5 ~ 14 VDC supply Current : 3 A or more 2. Digital multi meter Voltage range : FS = Approx. 20 V Current:10A or more Input resistance : High impedance 3.
- Page 26 R1006 R1013 R1007 LCD1...
- Page 32 SW402 SW404 SW401 SW403...
- Page 34 D801 D804 R802 D803 D802 Q801 D805 R801...
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