Alinco DR-138 Service Manual
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Alinco DR-138 Service Manual

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DR-138
Service Manual
* Block Diagram
* PC Board View
Downloaded from www.g7syw.com
ALINCO, INC.
www.g7syw.com

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  • Page 1 Downloaded from www.g7syw.com DR-138 Service Manual * Specifications * Circuit Description * Parts list * Schematic Diagram * Block Diagram * PC Board View * Mechanical Parts ALINCO, INC. www.g7syw.com...
  • Page 2 Downloaded from www.g7syw.com DR138 SPECIFICATIONS General Frequency Range 136~174MHz 136~174MHz Number of channels Operation mode 16KφF3E (Wide) 11KφF3E (Narrow) PLL Stepping 2.5, 5, 6.25, 8.33, 10, 12.5, 20, 25, 30, 50KHz Antenna Impedance 50Ω Working temperature –20℃~+60℃ Power Supply 13.8V DC±15% (11.7~15.8V) Grounding Method Negative ground Less than 300mA on standby...
  • Page 3 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION Frequency configuration The receiver utilizes double conversion. The first IF is 38.850 MHz and the second IF is 450kHz. The first local oscillator signal is supplied from the PLL circuit. The PLL circuit in the transmitter generates the necessary frequencies. Fig. 1 shows the frequencies. 450KHz ANT SW IF SYSTEM...
  • Page 4 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION  First Mixer The signal from the RF amplifier is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (Q205) to create a 38.850MHz first intermediate frequency (1st IF) signal.
  • Page 5 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION Squelch Circuit  The detection output from the FM IF IC (U200) passes through a noise amplifier (U202 B/2) to detect noise. A voltage is applied to the CPU (U2). The CPU controls squelch according to the voltage (SQIN) level.
  • Page 6 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION high and Q104 turns on. Q102 turns on and a voltage is applied to (8T). The CPU in the control unit monitors the PLL (U205) LD signal directly. When the PLL is unlocked during transmission, the PLL LD signal goes low. The CPU detects this signal and makes the TXC signal low.
  • Page 7 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION at the antenna end and to stabilize transmission output at voltage and temperature variations. (See Fig. Q220 Q212 Q214 Q216 D210,D211 RF AMP DRIVE STAGE D203 DRIVE AMP FINAL AMP ANT SW POWER D230,D231 U204 VR200 U505...
  • Page 8 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION P8 5 COM0~COM3 SEG0 ~SEG3 9 driver P8 6 P0 7 Q6,Q7 Fig. 12 Display circuit Encode  CTCSS, DCS data of the P31 Line is output from pin 42 of the CPU. The signal passes through a low-pass CR filter and goes to the D/A converter (U505).
  • Page 9 Downloaded from www.g7syw.com DR138 CIRCUIT DESCRIPTION D/A Converter  The D/A converter (U505) is used to adjust MO modulation, AF volume, TV voltage, FC reference voltage, and PC POWER CONTROL voltage level. Adjustment values are sent from the CPU as serial data. The D/A converter has a resolution of 256 and the following relationship is valid.
  • Page 10 Downloaded from www.g7syw.com DR138 P PARTS LIST DISPLAY UNIT Ref. No Parts No. Description of item Size (LxW)(mm) Specification C1-C2 SMT CAPACITOR 0603 104±10% 50V SMT CAPACITOR 0603 102±10% 50V SMT CAPACITOR 0603 104±10% 50V SMT CAPACITOR 0603 102±10% 50V SMT CAPACITOR 0603 104±10% 50V...
  • Page 11 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification SMT CAPACITOR 0603 100P±5% 50V SMT CAPACITOR 0603 225±10% 50V SMT CAPACITOR 0603 104±10% 50V SMT CAPACITOR 0603 8P±0.1P 50V SMT CAPACITOR 0603 103±10% 50V SMT CAPACITOR 0603 102±10% 50V...
  • Page 12 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R23-R26 SMT RESISTOR 0603 10K±5% SMT RESISTOR 0603 100K±5% R28-R34 SMT RESISTOR 0603 10K±5% SMT CAPACITOR 0603 183±10% 50V SMT RESISTOR 0603 220K±5% R37-R39 SMT RESISTOR 0603 47K±5%...
  • Page 13 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification SMT RESISTOR 0603 10K±5% SMT RESISTOR 0603 39K±5% SMT RESISTOR 0603 560R±5% SMT RESISTOR 0603 10K±5% RESISTOR 100R/1W±5% SMT RESISTOR 0603 0R±5% SMT RESISTOR 0603 NO USE SMT RESISTOR...
  • Page 14 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification SMT TRANSISTOR SOT-89 2SD1664 SMT DIGITAL TRANSISTOR EMT3 DTC144TE Q9-Q10 SMT DUAL DIGITAL TRANSISTOR SC-88A NO USE SMT IC TO-92 HT7550-1 SMT IC SQFP-64 R5F212A8SNFP SMT IC SQFP-64...
  • Page 15 Downloaded from www.g7syw.com DR138 PARTS LIST MAIN UNIT Ref. No Parts No. Description of item Size (LxW)(mm) Specification C100-C104 SMT CAPACITOR 0603 103±10% 50V C105-C109 SMT CAPACITOR 0603 102±10% 50V C110-C111 SMT CAPACITOR 0603 104±10% 50V C112-C113 SMT CAPACITOR 0805 104±10% 50V C200-C213 SMT CAPACITOR...
  • Page 16 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification C285 SMT CAPACITOR 0603 102±10% 50V C286 SMT CAPACITOR 0603 104±10% 50V C287-C288 SMT CAPACITOR 0603 102±10% 50V C289 SMT CAPACITOR 0603 82P±5% 50V C290 SMT CAPACITOR 0603...
  • Page 17 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification C324 SMT CAPACITOR 0603 5P±0.1P 50V C325 SMT CAPACITOR 0603 13P±5% 50V C326-C338 SMT CAPACITOR 0603 471±10% 50V C339 SMT CAPACITOR 0603 682±10% 50V C340 SMT CAPACITOR 0603...
  • Page 18 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification C369-C370 SMT CAPACITOR 1210 NO USE C371 SMT CAPACITOR 0603 100P±5% 50V C372-C373 SMT CAPACITOR 0603 180P±5% 50V C374 SMT CAPACITOR 1206 100P±5% 50V C375-C377 SMT CAPACITOR 0603...
  • Page 19 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification C410-C411 SMT CAPACITOR 0603 47P±5% 50V C500-C509 SMT CAPACITOR 0603 103±10% 50V C510-C515 SMT CAPACITOR 0603 102±10% 50V C516-C519 SMT CAPACITOR 0603 104±10% 50V C520-C526 SMT CAPACITOR 0603...
  • Page 20 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification C562 SMT CAPACITOR 0603 333±5% 50V C564-C565 SMT CAPACITOR 0603 104±5% 50V C800-C807 SMT CAPACITOR 0603 NO USE E100-E101 ELECTRO 10×15 470uF25V E102-E105 ELECTRO 4×8 47uF25V E200...
  • Page 21 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R100 SMT RESISTOR 2010 470R±5% R101 SMT RESISTOR 0603 4.7K±5% R102 SMT RESISTOR 0603 10K±5% R103 SMT RESISTOR 0603 3.3K±5% R104-R105 SMT RESISTOR 0603 47K±5% R106 SMT RESISTOR...
  • Page 22 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R232 SMT RESISTOR 0603 NO USE R233-R235 SMT RESISTOR 0603 470R±5% R236 SMT RESISTOR 0603 100R±5% R237 SMT RESISTOR 0603 10R±5% R238 SMT RESISTOR 0603 150R±5% R239...
  • Page 23 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R278 SMT RESISTOR 0603 47K±5% R279-R284 SMT RESISTOR 0603 NO USE R285 SMT RESISTOR 0603 100R±5% R286 SMT RESISTOR 0603 100K±5% R287-R289 SMT RESISTOR 0603 NO USE R290...
  • Page 24 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R320 SMT RESISTOR 0805 15R±5% R321-R322 SMT RESISTOR 0603 R323 SMT RESISTOR 0603 8.2K±5% R324 SMT RESISTOR 0805 330R±5% R325 SMT RESISTOR 1206 330R±5% R326 SMT RESISTOR 0603...
  • Page 25 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R502-R506 SMT RESISTOR 0603 10K±5% R507 SMT RESISTOR 0603 3.3K±5% R508-R510 SMT RESISTOR 0603 47K±5% R510 SMT RESISTOR 0603 22K±5% R511-R517 SMT RESISTOR 0603 1K±5% R518 SMT RESISTOR...
  • Page 26 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R561 SMT RESISTOR 0603 120K±5% R562 SMT RESISTOR 0603 33K±5% R563 SMT RESISTOR 0603 470K±5% R564 SMT RESISTOR 0603 390K±5% R565 SMT RESISTOR 0603 33K±5% R566 SMT RESISTOR...
  • Page 27 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification R800-R807 SMT RESISTOR 0603 NO USE RT200 SMT RESISTOR ARRAY 0603 100K D100 SURGE ABSORBER ZSA5A27 D200-D201 SMT DIODE SOT-416 DAN235E D202 SMT CAPACITOR 0603 390P±5% 50V D203...
  • Page 28 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification D502 SMT DIODE SOT-416 DAN222 Q100 SMT TRANSISTOR SC-62 2SB1386 Q101 SMT TRANSISTOR SOT-23 2SB624 Q102 SMT TRANSISTOR SC-62 2SB1132 Q103-Q104 SMT DIGITAL TRANSISTOR SC70 DTC114EU Q105...
  • Page 29 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification Q502 SMT TRANSISTOR SC-70 2SC4181 U100 SMT IC TO-220 MC7808 U101 SMT IC TO-92 MC78L05 U200 SMT IC SSOP16 TA31136F U201 SMT IC TO-92 MC78L05 U202 SMT IC...
  • Page 30 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification L219 SMT SMALL FIXED INDUCTOR 0603 22NH L220 SMT AIR-CORE COIL L221 SMT AIR-CORE COIL L222 AIR-CORE COIL 9.5T L223 SMT WIRE WOUND INDUCTOR 0805 NO USE L224...
  • Page 31 Downloaded from www.g7syw.com DR138 PARTS LIST Ref. No Parts No. Description of item Size (LxW)(mm) Specification CV201 SMT CAPACITOR 1206 6P±0.25P 50V ZU 10 J500 FLAT CABLE CONNECTOR (Erection type) SIPM32 0.5S-1-32PB ZU 10 J501 MIC SOCKET 3.5mm SD-3.5A PHONE-DC ZU 10 J502 JACK...
  • Page 32 Downloaded from www.g7syw.com DR138 SCHEMATIC DIAGRAM POWER(ORANGE(HT19-2101UYOC/E9) POWERLED HT7550-1 DR138LCD NOUSE Vout 100R/1W 150R DISPLAY 104P 22uF/25V 47uF/10V 103P 102P 271T 271T 271T 103P 22uF/10V UMC4N DTC144EE NOUSE 100K 102P 104P 220K MICG MICI 103P UMC4N PASS DCSWITCH MICM MODE DTC114EE CTCSS/DCS AT24C128RM(8)
  • Page 33 Downloaded from www.g7syw.com DR138 SCHEMATIC DIAGRAM R210 R272 R284 L200 R200 AM/FM DEMODULATION NOUSE 68NH 220R C321 TP204 C206 C410 C228 103P Q203 104P D201 R209 R285 C295 C204 C251 DTA114YE DAN235E C378 C372 FM RF AMP R296 R275 100R R205 R207 NOUSE...
  • Page 34 Downloaded from www.g7syw.com DR138 SCHEMATIC DIAGRAM R511 RX-IN C510 R541 102P DTM F-DET RX-OUT BUFFER AMP C520 D500 R543 R540 R501 104P(J) NOUSE R508 NOUSE AUDIO/HPF C501 R573 C503 R526 103P R542 C529 634K-1% 103P R575 C564 FILTER R586 180K* NOUSE NOUSE U501B...
  • Page 35 Downloaded from www.g7syw.com DR138 SCHEMATIC DIAGRAM P100 2SB1386 M C7808 M C78L05 F100 Vout C105 C106 M AIN+DC13.8V C100 C101 102P 102P R101 103P D100 E100 E101 103P E102 C102 E103 E104 C103 ZSA5A27 470uF/25V-10*16 C107 C109 470uF/25V-10*16 C110 47uF/25V 103P 47uF/25V C111...
  • Page 36 Downloaded from www.g7syw.com DR138 BLOCK DIAGRAM Q210 2SC4226 1 36 ~1 73.9975MHz Q214 D2 10,D211 Q217 Q209 Q2 07 D203 Q220 Q2 12 Q216 RD07 2SK187 5 2SC4226 2SC4226 DAN235E 2SC335 7 2SK3078 RFM 70U12D M I40 7 P RE DRIVE FINAL BUFF...
  • Page 37 Downloaded from www.g7syw.com DR138 PC board views www.g7syw.com...
  • Page 38 Downloaded from www.g7syw.com DR138 PC board views www.g7syw.com...
  • Page 39 Downloaded from www.g7syw.com DR138 PC board views www.g7syw.com...
  • Page 40 Downloaded from www.g7syw.com DR138 PC board views www.g7syw.com...
  • Page 41 Downloaded from www.g7syw.com DR-138/438 series Mechanical Parts Model Instruction Manual LCD Panel Main Unit LCD Unit DR-138 PS0665 / PS0665A ZDP1008 ZADM138 ZADL138 DR-438 PS0665A ZDP1012 ZADM438 ZADL438 UpDown Key Connect Cable ZFP1006 ZUA1004 Hook Screw Hook ZAA1005 ZFM1002 ZEY1000...
  • Page 42 Downloaded from www.g7syw.com ALINCO, INC. Yodoyabashi Dai-bldg 13F 4-4-9 Koraibashi, Chuo-ku, Osaka 541-0043, Japan Phone: +81-6-7636-2362 Fax: +81-6-6208-3802 E-mail: export@alinco.co.jp Dealer / Distributor Copyright Alinco, Inc. Osaka Japan PM0119 FNEH-NI www.g7syw.com...

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