Alinco DR-138 Service Manual Download Page 1

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* Specifications

* Circuit Description

* Parts list

* Schematic Diagram

* Block Diagram

* PC Board View

* Mechanical Parts

ALINCO, INC.

DR-138

Service Manual

Downloaded from www.g7syw.com

www.g7syw.com

Summary of Contents for DR-138

Page 1: ... Specifications Circuit Description Parts list Schematic Diagram Block Diagram PC Board View Mechanical Parts ALINCO INC DR 138 Service Manual Downloaded from www g7syw com www g7syw com ...

Page 2: ...kg TRANSMITTER Power Output High 60W Mid 25W Low About 10W Modulation Reactance modulation Maximum frequency deviation Wide 5kHz Narrow 2 5kHz Spurious emission 60dB Adjacent channel power Wide 70dB Narrow 60dB Noise and hum ratio Wide 40dB Narrow 36dB Microphone Impedance 1KΩ RECEIVER Receiver circuitry Double conversion superheterodyne Intermediate Frequency 1st 2nd 38 85MHz 450kHz Sensitivity 1...

Page 3: ...ates the necessary frequencies Fig 1 shows the frequencies Fig 1 Frequency configuration Receiver The receiver is double conversion super heterodyne designed to operate in the frequency range of 136 to 173 9975MHz The frequency configuration is shown in Fig 1 Front end RF amplifier An incoming signal from the antenna is applied to an RF amplifier Q206 after passing through a transmit receive switc...

Page 4: ...ter SW diodes D200 D201 cause CF201 to turn on to receive a Wide signal When the Narrow port is low the ceramic filter SW diodes D200 D201 cause CF200 to turn on to receive a Narrow signal See Fig 3 Fig 3 Wide Narrow Switching Circuit AF Signal System The detection signal from IF IC U200 goes to D A converter U505 for adjusting the gain and is output to AF filter U502 for characterizing the signal...

Page 5: ...lator VCO output signal is buffer amplified by Q210 then divided in U205 by a dualmodule programmable counter The divided signal is compared in phase with the 5 or 6 25kHz reference signal in the phase comparator in U205 The output signal from the phase comparator is filtered through a low pass filter and passed to the VCO to control the oscillator frequency See Fig 6 VCO The operating frequency i...

Page 6: ...ncy directly It FM modulates the carrier signal by means of a varicap diode Power Amplifier Circuit The transmit output signal from the VCO passes through the transmission reception selection diode D203 and amplified by Q220 Q212 and Q214 The amplified signal goes to the final amplifier Q216 through a low pass filter The low pass filter removes unwanted high frequency harmonic components and the r...

Page 7: ... U6 The EEPROM contains adjustment data The CPU U2 controls the EEPROM through two serial data lines See Fig 11 Fig 11 APC Circuit Display Circuit The CPU U2 controls the display LCD and LEDs When power is on the CPU will use the P07 line to control the LCD illumination backlight LEDs The brightness function is controlled by the switch Q6 and Q7 The LCD driver U3 and CPU U2 communicate through the...

Page 8: ...e parts which are higher than 3kHz frequency and the signal attained goes into the D A converter U505 The D A converter U505 adjusts the balance between the MOD and CTCSS DCS levels Signal of CTCSS DCS port is summed with MOD and the resulting signal goes to the VCO This signal is applied to a varicap diode in the VCO for direct FM modulation See Fig 13 Fig 13 Encode circuit Decode DCS CTCSS DTMF ...

Page 9: ...e POWER switch on the display unit is pressed the power port on the display unit which is connected to CPU port 45 POWER goes low then CPU port 23 P20 goes high Q103 turns on SBE SW Q100 turns on and power SBE is supplied to the radio During receiving the CPU port 19 P24 output H level Q101 and Q108 turn on and reception circuit is supplied by 8V power supply 8R When the receiving is at FM the CUP...

Page 10: ...0V C25 C27 SMT CAPACITOR 0603 3 103 10 50V C28 SMT CAPACITOR 0603 1 102 10 50V C29 SMT CAPACITOR 0603 1 104 10 50V C30 SMT CAPACITOR 0603 1 103 10 50V C31 SMT CAPACITOR 0603 1 NO USE C32 SMT CAPACITOR 0603 1 105 10 50V C33 C34 SMT CAPACITOR 0603 2 473 10 50V C35 C36 SMT CAPACITOR 0603 2 273 10 50V C37 SMT CAPACITOR 0603 1 225 10 50V C38 SMT CAPACITOR 0603 1 103 10 50V C39 SMT CAPACITOR 0603 1 102 ...

Page 11: ...T TANTALUM CAPACITOR A type 1 22uF 20 10V E4 ELECTRO 4 8 1 22uF 10V E5 SMT TANTALUM CAPACITOR A type 1 22uF 20 10V E1000 E1003 SMT TANTALUM CAPACITOR A type 3 NO USE R1 SMT RESISTOR 0603 1 10K 5 R2 SMT RESISTOR 0603 1 22K 5 R3 R7 SMT RESISTOR 0603 4 1K 5 R8 SMT RESISTOR 0603 1 10K 5 R9 R10 SMT RESISTOR 0603 2 1K 5 R11 SMT RESISTOR 0603 1 10K 5 R12 SMT RESISTOR 0603 1 1K 5 R13 SMT RESISTOR 0603 1 1...

Page 12: ...K 5 R46 SMT RESISTOR 0603 1 100R 5 R47 SMT RESISTOR 0603 1 12K 5 R49 SMT RESISTOR 0603 1 1 2K 5 R50 SMT RESISTOR 0603 1 180K 5 R51 SMT RESISTOR 0603 1 750R 5 R52 SMT RESISTOR 0603 1 560R 5 R53 SMT RESISTOR 0805 1 68R 5 R54 SMT RESISTOR 0603 1 100R 5 R55 SMT RESISTOR 0603 1 470R 5 R56 SMT RESISTOR 0603 1 4 7K 5 R57 SMT RESISTOR 0603 1 2 2K 5 R58 SMT RESISTOR 0603 1 4 7K 5 R59 SMT RESISTOR 0603 1 47...

Page 13: ... ZENER DIODE 0805 2 5 6V D3 SMT LIGHTED DIODE 0603 1 ORANGE D4 SMT ZENER DIODE 0805 1 5 6V D5 LIGHTED DIODE DIP 1 BLUE AND ORANGE D6 SMT DIODE SC 70 1 1SS372 D7 SMT DIODE 0603 1 HSC277 D8 SMT LIGHTED DIODE 0603 1 ORANGE D9 SMT LIGHTED DIODE 0603 1 RED D10 D13 SMT DIODE SOT 323 4 DA221 D14 D16 SMT LIGHTED DIODE 0603 3 ORANGE D17 SMT LIGHTED DIODE 0603 1 ORANGE DS1 LCD 1 LCD Q1 SMT DIGITAL TRANSISTO...

Page 14: ...L1001 SMT FERRITE BEAD BLACK 0603 2 NO USE J1 FLAT CABLE CONNECTOR Erection type SIPM32 1 0 5S 1 32PB J2 JACK 1 NO USE J3 Mic Connector SKY8 1 HAND MIC INTERFACE J4 J5 SMT RESISTOR 0603 2 NO USE J6 SMT CONNECTOR BLUETOOTH SIP1 25M4H 1 NO USE S1 SWITCH 6 3 5 4 5 1 POWER S2 SWITCH 6 3 5 4 5 1 FUNC S3 DIAL 1 ENCODER S4 SWITCH 6 3 5 4 5 1 V M S5 SWITCH 6 3 5 4 5 1 MHz S6 SWITCH 6 3 5 4 5 1 TSQ S7 SWIT...

Page 15: ... SMT CAPACITOR 0603 6 104 10 50V C238 SMT CAPACITOR 0805 1 104 10 50V C240 C242 SMT CAPACITOR 0603 3 104 10 50V C243 SMT CAPACITOR 0603 1 471 10 50V C244 SMT CAPACITOR 0603 1 103 10 50V C245 C248 SMT CAPACITOR 0603 4 104 5 50V C249 C250 SMT CAPACITOR 0603 2 102 10 50V C251 SMT CAPACITOR 0603 1 33P 5 50V C252 C265 SMT CAPACITOR 0603 13 102 10 50V C267 C268 SMT CAPACITOR 1206 2 102 10 50V C269 SMT C...

Page 16: ... SMT CAPACITOR 0603 1 1 5P 0 1P 50V C299 SMT CAPACITOR 0603 1 4P 0 1P 50V C300 C302 SMT CAPACITOR 0603 3 10P 0 25P 50V C303 SMT CAPACITOR 0603 1 6P 0 1P 50V C304 C305 SMT CAPACITOR 0603 2 10P 0 25P 50V C306 SMT CAPACITOR 0603 1 10P 0 25P 50V C307 SMT CAPACITOR 0603 1 2P 0 1P 50V C308 C309 SMT CAPACITOR 0603 2 NO USE C310 C311 SMT CAPACITOR 1210 2 NO USE C312 C313 SMT CAPACITOR 1206 2 NO USE C314 S...

Page 17: ...0603 1 NO USE C349 C350 SMT CAPACITOR 1210 2 27P 5 50V C351 SMT CAPACITOR 0603 1 22P 5 50V C352 SMT CAPACITOR 0603 1 27P 5 50V C353 SMT CAPACITOR 0805 1 22P 5 50V C354 SMT CAPACITOR 0805 1 NO USE C355 C356 SMT CAPACITOR 0603 2 6P 0 1P 50V C357 SMT CAPACITOR 0603 1 33P 5 50V C358 SMT CAPACITOR 0603 1 12P 5 50V C359 SMT CAPACITOR 0603 1 39P 5 50V C360 SMT CAPACITOR 0603 1 9P 0 25P 50V C361 SMT CAPAC...

Page 18: ...6 2 12P 5 50V C386 SMT CAPACITOR 0603 1 15P 5 50V C387 SMT CAPACITOR 1210 1 120P 5 50V C388 C392 SMT CAPACITOR 0603 5 NO USE C393 SMT CAPACITOR 1206 1 1P 0 1P 50V C394 SMT CAPACITOR 0603 1 5P 0 1P 50V C395 SMT CAPACITOR 0603 1 NO USE C396 SMT CAPACITOR 0603 1 9P 0 25P 50V C397 SMT CAPACITOR 0603 1 15P 5 50V C398 C401 SMT CAPACITOR 0603 4 0 5P 0 1P 50V C402 SMT CAPACITOR 0603 1 12P 5 50V C403 SMT C...

Page 19: ...CITOR 0805 1 474 10 50V C535 SMT CAPACITOR 0805 1 474 5 50V C536 C537 SMT CAPACITOR 0603 2 390P 10 50V C538 SMT CAPACITOR 0603 1 273 5 50V C539 SMT CAPACITOR 0603 1 224 5 50V C540 SMT CAPACITOR 0603 1 182 5 50V C541 SMT CAPACITOR 0603 1 393 5 50V C542 C551 SMT CAPACITOR 0603 10 103 5 50V C552 SMT CAPACITOR 0603 1 104 5 50V C553 SMT CAPACITOR 0603 1 473 5 50V C554 SMT CAPACITOR 0603 1 272 5 50V C55...

Page 20: ... SMT TANTALUM CAPACITOR A type 1 0 22uF 20 35V E210 SMT TANTALUM CAPACITOR A type 1 NO USE E211 SMT TANTALUM CAPACITOR A type 1 6 8uF 20 16V E212 SMT TANTALUM CAPACITOR A type 1 0 68uF 20 35V E500 E509 SMT TANTALUM CAPACITOR A type 10 1uF 20 16V E510 E513 SMT TANTALUM CAPACITOR A type 4 10uF 20 10V E514 SMT TANTALUM CAPACITOR A type 1 NO USE E515 SMT TANTALUM CAPACITOR A type 1 10uF 20 10V E516 SM...

Page 21: ...T RESISTOR 0603 7 10K 5 R211 SMT RESISTOR 0603 1 270K 5 R212 SMT RESISTOR 0603 1 27K 5 R213 SMT RESISTOR 0603 1 10K 5 R214 SMT RESISTOR 0603 1 15K 5 R215 R216 SMT RESISTOR 0603 2 10K 5 R217 SMT RESISTOR 0603 1 100K 5 R218 SMT RESISTOR 0603 1 47K 5 R219 R220 SMT RESISTOR 0603 2 10K 5 R221 SMT RESISTOR 0603 1 1K 5 R222 SMT RESISTOR 0603 1 NO USE R223 R224 SMT RESISTOR 0603 2 22K 5 R225 SMT RESISTOR ...

Page 22: ... 2010 1 100R 5 R246 SMT RESISTOR 0603 1 220R 5 R247 R249 SMT RESISTOR 0603 3 100K 5 R250 SMT RESISTOR 0603 1 39K 5 R251 R256 SMT RESISTOR 0603 6 100K 5 R257 SMT RESISTOR 0603 1 300K 5 R258 R260 SMT RESISTOR 0603 3 100K 5 R261 SMT RESISTOR 0603 1 680R 5 R262 SMT RESISTOR 0603 1 560R 5 R263 R265 SMT RESISTOR 0603 3 1 K 5 R266 SMT RESISTOR 0603 1 NO USE R267 SMT RESISTOR 0603 1 560R 5 R268 R270 SMT R...

Page 23: ...T RESISTOR 0603 1 180K 5 R297 R299 SMT RESISTOR 0603 3 NO USE R300 SMT RESISTOR 0603 1 2 2K 5 R301 SMT RESISTOR 0603 1 2K 5 R302 SMT RESISTOR 0603 1 2 2K 5 R303 R304 SMT RESISTOR 0603 2 47K 5 R305 SMT RESISTOR 0603 1 4 7K 5 R306 SMT RESISTOR 0603 1 47K 5 R307 SMT RESISTOR 0603 1 470R 5 R308 SMT RESISTOR 0603 1 68K 5 R309 R310 SMT RESISTOR 0603 2 47K 5 R311 R312 SMT RESISTOR 0603 2 270R 5 R313 SMT ...

Page 24: ...1 SMT RESISTOR 0603 1 100K 5 R332 SMT RESISTOR 0603 1 10R 5 R333 SMT RESISTOR 0603 1 100R 5 R334 SMT RESISTOR 0603 1 100K 5 R335 SMT RESISTOR 0603 1 4 7K 5 R336 SMT RESISTOR 0603 1 2 2K 5 R337 SMT RESISTOR 1206 1 33R 5 R338 SMT RESISTOR 0603 1 330R 5 R339 SMT RESISTOR 0603 1 220K 5 R340 SMT RESISTOR 0603 1 270K 5 R341 SMT RESISTOR 0603 1 15K 5 R342 SMT RESISTOR 0603 1 0R R343 SMT RESISTOR 0603 1 2...

Page 25: ...OR 0603 1 1 5K 5 R524 SMT RESISTOR 0603 1 100R 5 R525 SMT RESISTOR 0603 1 100K 5 R526 SMT RESISTOR 0603 1 180K 5 R527 R528 SMT RESISTOR 0603 2 100K 5 R529 SMT RESISTOR 0603 1 24K 5 R530 R539 SMT RESISTOR 0603 10 100K 5 R540 SMT RESISTOR 0603 1 NO USE R541 SMT RESISTOR 0603 1 1K 5 R542 R544 SMT RESISTOR 0603 3 NO USE R545 SMT RESISTOR 0603 1 12K 5 R546 SMT CAPACITOR 0603 1 473 10 50V R547 SMT RESIS...

Page 26: ...ESISTOR 0603 1 25 5K 1 R572 SMT RESISTOR 0603 1 5 11K 1 R573 SMT RESISTOR 0603 1 634K 1 R574 SMT RESISTOR 0603 1 15 8K 1 R575 SMT RESISTOR 0603 1 29 4K 1 R576 SMT RESISTOR 0603 1 11 5K 1 R577 SMT RESISTOR 0603 1 150K 1 R578 SMT RESISTOR 0603 1 4 22K 1 R579 SMT RESISTOR 0603 1 715K 1 R580 SMT RESISTOR 0603 1 18K 5 R581 SMT RESISTOR 0603 1 39K 5 R582 SMT RESISTOR 0603 1 680K 5 R583 SMT RESISTOR 0603...

Page 27: ...03 1 NO USE D216 SMT VARIABLE CAPACITANCE DIODE 0805 1 NO USE D217 SMT VARIABLE CAPACITANCE DIODE 0805 1 1SV324 V8 D218 SMT VARIABLE CAPACITANCE DIODE 0805 1 NO USE D219 D220 SMT VARIABLE CAPACITANCE DIODE 0805 2 1SV324 V8 D221 SMT VARIABLE CAPACITANCE DIODE 0805 1 NO USE D222 SMT VARIABLE CAPACITANCE DIODE 0805 1 1SV324 V8 D223 SMT VARIABLE CAPACITANCE DIODE 0805 1 NO USE D224 D225 SMT DIODE 0805...

Page 28: ...O USE Q203 SMT DIGITAL TRANSISTOR EMT3 1 DTA114YE Q204 SMT TRANSISTOR SC 70 1 2SC4215 Q205 Q206 SMT FET SOT 143 2 3SK318 Q207 SMT TRANSISTOR SC 70 1 2SC4226 Q208 SMT TRANSISTOR SC 70 1 NO USE Q209 Q210 SMT TRANSISTOR SC 70 2 2SC4226 Q211 SMT TRANSISTOR SC 70 1 2SC4215 Q212 SMT FET SOT 89 1 2SK3078A Q213 SMT DIGITAL TRANSISTOR EMT3 1 DTA114EE Q214 SMT FET PLD 1 RD07 Q216 SMT FET TO500 1 RFM70U12D Q...

Page 29: ...1 LA4600 U800 SMT IC SSOP16 1 NO USE L200 SMT SMALL FIXED INDUCTOR 0603 1 68NH L201 SMT WIRE WOUND INDUCTOR 0805 1 560NH L202 SMT WIRE WOUND INDUCTOR 0805 1 330NH L203 SMT SMALL FIXED INDUCTOR 0603 1 NO USE L204 L207 SMT AIR CORE COIL 4 8T L208 SMT RESISTOR 0805 1 0R L209 SMT RESISTOR 0603 1 0R L210 SMT SMALL FIXED INDUCTOR 0603 1 82NH L211 SMT SMALL FIXED INDUCTOR 0603 1 100NH L212 SMT WIRE WOUND...

Page 30: ...5 1 33NH L236 SMT WIRE WOUND INDUCTOR 0603 1 100NH L237 L238 SMT SMALL FIXED INDUCTOR 0603 2 10uH L239 SMT WIRE WOUND INDUCTOR 0603 1 220NH L240 L241 SMT FERRITE BEAD BLACK 0603 2 271T L242 SMT RESISTOR 0603 1 4 7K 5 L243 SMT FERRITE BEAD BLACK 0603 1 271T L244 SMT SMALL FIXED INDUCTOR BLOVE 2520 1 10uH L245 L246 AIR CORE COIL 2 9 5T L247 SMT WIRE WOUND INDUCTOR 0805 1 47NH L248 SMT SMALL FIXED IN...

Page 31: ...5A 1 PHONE DC J502 JACK 1 SP JACK J503 JACK SIP 6 1 5mm 1 CON6 J504 JACK SIP 2 2 0mm 1 CON2 LS500 SPEAKER 1 SPK 8R 56 VR200 SMT VARIOUS RESISTOR VER3 3 1 47K 5 VR500 SMT VARIOUS RESISTOR VER3 3 1 47K 5 F100 SMT RESISTOR 1206 1 0R X200 SMT TCXO 1 19 200MHz XF200 XF201 SMT CRYSTAL FILTER 2 38 5MHz Y200 CRYSTAL 1 NO USE Y800 CRYSTAL 1 NO USE Z 10 ZU 10 ZU 10 ZU 10 ZU 10 1 Downloaded from www g7syw co...

Page 32: ... 5M XOUT XIN D7 HSC277 5M XOUT XIN P05 P03 P00 P01 P04 5M P66 P67 Q8 DTC144TE 1 1 2 2 3 3 D6 1SS372 RXD TXD UART 3 1 4 5 2 U2008 TA75S01F P02 P32 SUBB P20 P21 P61 P62 P25 P63 P51 P36 P50 SUB P52 P53 P06 P24 P26 P27 P60 P23 P54 P43 P10 P11 P64 P65 P43 P37 1 2 J5 10K R11 10K P30 P33 P30 P33 P63 P85 P86 R18 10K C3 102P C5 102P C20 102P C28 102P C41 102P R19 10K R23 10K R24 10K C45 102P R25 10K R26 10...

Page 33: ... 6 LD 8 OSCOUT 3 BISW 16 FOUT 17 PMPp 18 PMPr 20 NC 2 NC 9 NC 12 VP 4 VC C 5 GND 7 U205 LMX1511TM 20 L209 R0 C362 10P C C256 102P 8C C352 27P D 3 G 2 S 1 Q217 2SK1875 C386 15P C402 12P C398 0P5 B C403 0P75 B C394 5P B C290 15P C356 6P B C224 103P B1 2 E1 1 C1 5 C2 4 E2 3 Q201 UMC4N L233 10uH L235 33NH X L211 100NH 1 1 2 2 L236 100NH 1 1 2 2 L 237 10uH R326 560R R316 22R R322 R0 R308 68K R244 220R ...

Page 34: ... 103P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 J500 MAIN INTER FACE 0 5S 1 32PB W N RSSI AIR RX TX CLK DAT STB PLD M ICI M ICI SQL RSSI M ICM RXC AFM DTM F DET SPM STB CLK DAT ELD PLD AIR RX TX W N TXC DTM F SUBO SUBB 8RX CONTROL 8TX CONTROL AM FM CONTROL SUB RXC AIR TXC C551 103P J C530 NOUSE R522 22K C515 102P SPLATTER FILTER AGC MIC MUTE MIC AMP IDC...

Page 35: ...ENABLE PLL LD LINE DET SQUELCHDET M OD AUDIO AM SW PC TV M OD SUB WIDE NARROW RSSI RX TX FREQ CONT AF SQ TEM P 138VHF RF 138VHF RF Sch PLL CLOCK LINE PLL DATA LINE PLL STB ENABLE PLL LD LINE DET SQUELCHDET M OD AUDIO AM SW PC TV M OD SUB WIDE NARROW RSSI RX TX FREQ CONT AF SQ TEM P DET SQUELCH DET M OD AUDIO M OD SUB FREQ CONT AM SW WIDE NARROW RSSI RX TX PLL CLOCK LINE PLL DATA LINE PLL STB ENABL...

Page 36: ...R TUNE RF BPF TUNE D207 D208 HVC376 D205 D206 HVC376 D A PROTECTION SW DC AMP 8R U202 CONV P13 TEMPERATURE t 8T Q225 DTC144EE PC TV 8T MCF XF200 XF201 38 85MHz IF AMP Q204 2SC4215 DEMODULATOR NARROW CF200 SW WIDE SW SW 8R D201 DAN235E D200 DAN235E P60 Q200 UMC4N WIDE CF201 NARROW SW Q203 DTA114YE IF VIF U200 TA31136FN Q211 2SC4215 AF SQ BUFFER AMP U501 LM2902 D 4 D A CONV NOISE Q213 CHARGE DTA114E...

Page 37: ...PC board views DR138 37 Downloaded from www g7syw com www g7syw com ...

Page 38: ...PC board views DR138 38 Downloaded from www g7syw com www g7syw com ...

Page 39: ...PC board views DR138 39 Downloaded from www g7syw com www g7syw com ...

Page 40: ...PC board views DR138 40 Downloaded from www g7syw com www g7syw com ...

Page 41: ... Washer ZAZ1001 Fuse ZEF1000 S washer ZAZ1000 Tapping Screws ZAJ1000 Encoder knob ZNK1004 VR Ring ZNK1005 7key Rubber ZFG1006 LCD Display ZEL1001 LCD Panel Val LCD Unit Val Dial Nut ZAN1001 Front Case ZKM1005 Speaker ZES1002 Case Screws ZAA1004 16key Rubber ZFG1007 EMS74 Front Case ZKM1006 EMS74 Front Switch ZFP1004 ANT CN ZUE1000 Main Cable ZUA1003 Main Unit Val Main Unit ZUP1021 Mic ZEY1000 UpDo...

Page 42: ...dg 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 Copyright Alinco Inc Osaka Japan PM0119 FNEH NI Dealer Distributor Downloaded from www g7syw com www g7syw com ...

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