Alinco DR-235 Service Manual Download Page 29 | Manualshive

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DR-235 ADJUSTMENT

1 ) A d j u s t m e n t S p o t

Power Supply Voltage 13.8V

Output of SSG is all EMF indication.

If without instruction, WIDE mode.
If without instruction, SSG output is MOD 1 KHz WIDE DEV 3.5KHz/DEV,

NARROW DEV 1.75KHz/DEV.

Standard modulation is also based above.
Speaker load is 8 ohm and output is 50 ~ 100 mV.

All manuals and user guides at all-guides.com

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Summary of Contents for DR-235

Page 1: ...HN E X P LO D E D V IE W 1 LCD Assembly 2 Top and Front View 3 Bottom View PARTS LIST 2 CPU Unit 21 22 2 MAIN Unit 22 25 2 Mechanical Parts 25 Packing Parts 25 ACCESSORIES 25 3 4 ACCESSORIES SCREW SET 25 4 TNC EJ41U 26 5 TNC EJ41U Packing Parts 27 5 6 6 DR 235 ADJUSTMENT 7 9 1 Adjustment Spot 28 2 VCO and RX Adjustment Specification 29 3 TX Adjustment Specification 30 10 4 RX Test Specification 31...

Page 2: ...ansmitter Output power Hi Mid Low 25 W 10 W Approx 5 W Modulation system Variable reactance frequency modulation Maximum Frequency deviation 5kHz Wide mode 2 5kHz Narrow mode Spurious emission 6 0 dB Adjacent channel power 6 0 dB Noise and hum ratio 40 dB Wide mode 34 dB Narrow mode Microphone impedance 2kohm Receiver Sensitivity 14 dBu for 12 dB SINAD Receiver circuit Double conversion super hete...

Page 3: ...amplifies the signal of the selected frequency 3 Demodulation Circuit After the signal is amplified by the first IF amplifier Q105 it is input to pin 16 of the demodulator IC IC108 The second local signal of 30 395 M Hz which is oscillated by the internal oscillation circuit in 1C108 and crystal X104 is input through pin 1 of 1C108 Then these two signals are mixed by the internal mixer in IC108 an...

Page 4: ...l which passes through mic mute control IC109 is adjusted to an appropriate mic volume by means of mic gain adjust VR106 IC114 C and D consists of four operational amplifiers one amplifier pins 12 13 and 14 is composed of pre emphasis and IDC circuits and the other pins 8 9 and 10 is composed of a splatter filter The maximum frequency deviation is obtained by VR107 and input to the signal switch I...

Page 5: ...16 generates a pulse signal which is converted to DC voltage by the PLL loop filter and input to the varicap of the VCO unit for oscillation frequency control 5 VCO Circuit A Colpitts oscillation circuit driven by Q131 directly oscillates the desired frequency The frequency control voltage determined in the CPU IC1 and PLL circuit is input to the varicaps D122 and D123 This change the oscillation ...

Page 6: ...grammed tone frequency code in the CPU The squelch will open when they match During DCS Q108 is ON C419 is working and cut off frequency is lowered 5 P o w e r S u p p ly C ir c u it When power supply is ON there is a L signal being inputted to pin 39 PSW of CPU which enables the CPU to work Then H signal is outputted from the pin 41 C5C of CPU and drives ON the power supply switch control Q8 and ...

Page 7: ...SCLK1 P45 TXD P44 RXD P43 sjS T0UT P42 INT2 P41 INT1 P40 P77 ñ M O o o o o o r o o o o S r i o OO OO C D O 44 s X f O O S E G 13 S E G 14 S E G 15 S E G 16 S E G 17 P30 SEG18 P31 SEG19 P32 SEG20 P33 SEG 21 P34 SEG22 P35 SEG 23 P36 SEG24 P37 SEG25 P00 SEG26 P01 SEG27 P02 SEG 28 P03 SEG 29 P04 SEG 30 P05 SEG 31 P06 SEG 32 PÛ 7 SEG 33 P10 SEG34 P11 SEG35 P12 SEG 36 P13 SEG37 O T I m 5 3 M O O 3 C D O...

Page 8: ...TXD UTX 0 UART data transmission output 20 P44 RXD RTX I UART data reception output 21 P43 n TOUT BEEP I O Beep tone Band plan 3 22 P42 INT2 SEC I Security voltage input 23 P41 INT1 RE1 I Rotary encoder input 24 P40 DSQ I Digital squelch input 25 P77 PTT I PTT input 26 P76 SSTB 0 Strobe signal to scramble IC Security mode 27 P75 W N 0 Wide Narrow SW 28 P74 T5 0 TX power ON OFF output 29 P73 R5 0 R...

Page 9: ...P31 SEG19 S19 0 70 P30 SEG18 S18 0 71 72 SEG17 SEG16 S17 S16 0 0 LCD segment signal 73 SEG15 S15 0 74 SEG14 S14 0 75 SEG13 S13 0 76 SEG12 S12 0 77 SEG11 S11 0 78 SEG10 S10 0 79 SEG9 S9 0 80 SEG8 S8 0 81 SEG7 S7 0 82 SEG6 S6 0 83 SEG5 S5 0 84 SEG4 S4 0 85 SEG3 S3 0 86 SEG2 S2 0 87 SEG1 S1 0 88 SEGO SO 0 89 VCC VDD CPU power terminal 90 VREF Vref AD converter power supply 91 AVSS Avss AD converter G...

Page 10: ...n IN OUT L Disconnect Hi Z H Connect 290ohm typ 3 A N 8 0 1 0 M X A 0 1 1 9 10V 50mA Voltage Regulator Vin c 1 OUTPUT i L 1 K C _ 3 2 COMMON 1 S u u Ü 3 INPUT S 1 2 3 S h a r ic ir c u it p r o to lo r 3 Vaut T 0 G N D 4 T C 4 W 5 3 F U X A 0 3 4 8 Multiplexer De multiplexer 8 7 6 5 n p 1 COMMON 2 INH 3 VEE 4 VSS 5 A 6 ch 1 7 ch 0 8 VDD Control input ON channel INH A L L ch 0 L H ch 1 H NONE Don t...

Page 11: ...5W Audio Power Amplifier 1 Input 2 Small signal GND 3 Large signal GND 4 Output 5 Vcc X LA4425 WILJIIUi Test Circuit 1 2 3 4 5 7 B R 2 4 L 3 2 F J X A 0 6 0 4 Z 32K Bit EEPROM 8 7 6 5 R R R R 1 AO 2 A1 3 A2 4 Vss 5 SDA 6 SCL 7 WP 8 Vcc Name Function A0 A2 Vss SDA SCL WP Vcc User Configurable Chip Select Ground Serial Address Data I O Serial Clock Write Protect Input 2 5 6 0V Power Supply All manua...

Page 12: ...ional Amplifiers 8 7 6 5 C D cn C V J o 1 12 3 4 1 Output A 2 Inverting Input A 3 Non inverting Input A 4 GND 5 Non inverting Input B 6 Inverting Input B 7 Output B 8 Vcc 1 1 L M 2 9 0 2 P W R X A 1 1 0 6 Quad Operational Amplifiers 2 3 4 5 6 7 1 Output A 2 Inverting Input A 3 Non Inverting Input A 4 Vcc 5 Non inverting Input B 6 Inverting Input B 7 Output B 8 Output C 9 Inverting Input C 10 Non i...

Page 13: ...h 11 bit latch B inaly 7 bit sw a llo w co u n ter B inary 11 bit p ro g ra m m a b le counter ÍP fr P h a s e co m p a rato r L o c k dctcctor LD fr fp selector C h a rg e p u m p LD fout V p D o V C C G N D Vcc 2 7 to 5 0V Ta 40 C to 85oC Parameter Symbo I Condition Min Typ Max Unit Power supply voltage Vcc 2 7 3 75 5 0 V Power supply current icc 2500MHz Vcc Vp 3 75V 8 0 mA LPF supply voltage Vp...

Page 14: ...plexer Y O T if V D D I Y2 T Y2 V O X2 15 X 2 Y C O M M O N T Y IN OUT XI J4 XI Y3 7 vs X U IN OUT 35 X C O M M O N Y 1 T Y 1 xo 3U X O INHIBIT T IN H X3 W X3 VEE T VEE B A To A VSS T I T B INHIBIT A B COMMON ON SWITCH L L L X Y XO YO L H L X1 Y1 L L H X2 Y2 L H H X3 Y3 H NONE Don t care All manuals and user guides at all guides com ...

Page 15: ...er 30 W Tease OP Operation Case Temperature 30 to 100 C Tstg Storage Temprature 40 to 110 C ELECTRICAL CHARACTERISTICS Tc 25 C unless otherwise noted Symbol Parameter Conditions Ratings Unit Min Typ Max f Frequency Range 220 246 MHz Pout Output Power VDD 12 5V VGG 5V Pin 50mW 30 W VT Total Efficiency 40 2fo 2n a Harmonic 25 dBc Pin Input VSWR 3 0 IGG Gate Current 1 mA Stability VDD 10 5 16 5V VGG ...

Page 16: ...Í 2SK880G R XËÔÔ2Î 3SK293 XÉd053 2SK2539 XËÔ066 i Œ 4 M X G G 2 G l B ___Q U F b n D S AK FA1111C XLÖÖ69 FA1111C XLÔ Ô 77 2SA1036K x fö iiö 2SC4245Y xfdÍ25 2SB766A m m 2SC4915 xfÖ Í 78 2SB1386 xf0190 c n H Q H B BOR u u u B C E Q O B H Q U U ü B C E 2SC5551 xf0194 2SD2620J xf0208 2SC6026M FV xfÖ2l Ö XP1215 XÙ0178 RN1104 XÙÔ 195 E M D 6 X Û Ô 2Ô 9 RN1107FV XÜ02Í0 U U U B C E RN2107FV XÚ02ÍÍ c __ __...

Page 17: ...V All manuals and user guides at all guides com ...

Page 18: ...Íez f e e i O O CO M 3 COM2 C0M 1 COMO 17 LCD C o n n e c t io n T T R 3 6 2 6 U P F D H N All manuals and user guides at all guides com ...

Page 19: ...FF0017 EXPLODED VIEW 1 LCD Assembly ST0064 All manuals and user guides at all guides com ...

Page 20: ...2 Top and Front View AA0050 DP0185 NK0072 KZ01D5 NK0073 All manuals and user guides at all guides com ...

Page 21: ...3 B o tto m V ie w AA0050 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 22: ...103X 1 R7 RK0025 Chip R ERJ6GEYJ331V 1 R8 RK0025 Chip R ERJ6GEYJ331V 1 R9 RK3538 Chip R ERJ2GEJ102X 1 R10 RK3032 Chip R MCRÛ3EZPJ331 1 R11 RK3546 Chip R ERJ2GEJ472X 1 R14 RK3548 Chip R ERJ2GEJ682X 1 R16 RK3001 Chip R MCR03EZPJ0Û0 1 R19 RK3562 Chip R ERJ2GEJ104X 1 R20 RK3542 Chip R ERJ2GEJ222X 1 R21 RK3030 Chip R MCR03EZPJ221 1 Ref No Part No Description Parts Name Qty R22 RK3538 Chip R ERJ2GEJ102X...

Page 23: ...008 Chip C GRM31M2C2H7R0DV01L 1 C205 CU3035 Chip C C1608JB1H102KT NS 1 C206 CE0339 Electrolytic C 16ME1 OSWB TS ALC 1 C207 CU3002 Chip C C1608CH1H010CT NS 1 C20B CU3002 Chip C C1608CH1H010CT NS 1 C209 CU3035 Chip C 01608JB1H102KT NS 1 C210 CU3008 Chip C LMK212BJ105KG T 1 C211 CU3008 Chip C LMK212BJ105KG T 1 C212 CEO364 Electrolytic C 16ME47SWB TS 1 C213 CU3035 Chip C C1608JB1H102KT NS 1 C215 CU401...

Page 24: ... 10101 XA0675 IC L88MS05TL TL E 1 10104 XA1106 IC LM2902PWR 1 Ref No Part No Description Parts Name Qty IC108 XA0404 IC TA31136FNG EL 1 IC109 XA0115 IC TC4S66F TE85R F 1 IC110 XA1230 IC S AV40 ALI Q 200MHZ 1 IC111 XA1229 IC BU4052BCFV E2 1 ÎC112 XA0119 IC AN8010M E1 1 IC113 XA0348 IC TC4W53FU TE12L F 1 10114 XA1106 IC LM2902PWR 1 IC115 XA0102 IC NJM7808FA ZZZ B 1 IC116 XA1107 IC MB15E07SRPFTGBNDEF...

Page 25: ...R03EZPJ102 1 R227 RK35Q1 Chip R ERJ2GEOROOX 1 R228 RK3538 Chip R ERJ2GEJ102X 1 Ref No Part No Description Parts Name Qty R229 RK3555 Chip R ERJ2GEJ273X 1 R230 RK3546 Chip R ERJ2GEJ472X 1 R231 RK3050 Chip R MCR03EZPJ1D3 1 R232 RK3526 Chip R ERJ2GEJ101X 1 R233 RK3550 Chip R ERJ2GEJ103X 1 R234 RK3556 Chip R ERJ2GEJ333X 1 R235 RK3562 Chip R ERJ2GEJ104X 1 R236 RK3551 Chip R ERJ2GEJ123X 1 R237 RK3526 Ch...

Page 26: ...1 VR109 RH0229 Trimmer R RH02B1 CJ4X 22K OHM 1 VR110 RH0233 Trimmer R RHD2B1C15X 100K OHM 1 X101 XK0002 Discriminator CDBLB455KCAY07 B0 1 X102 XQ0194 VCTCXO NT3225SA 12 800MHZ 1 X104 XQ0058A Xtal UM5 30 395M 1 XF101 XF0014Z Xtal Filter UM1 30 85MHZ 1 FGÛ320 SP Cushion SP CUSHION DR135 1 SDÛ034 Spring GND SPRING DR130 2 TZ0049 Dumper SILICON DUMPER 3 UP0579 P C BOARD DR235MK3 INTEGRATED 1 Mechanica...

Page 27: ...R5 RK3D34 Chip R MCR03EZPJ471 1 R6 RK3034 Chip R MCR03E2PJ471 1 R7 RK3034 Chip R MCR03EZPJ471 1 R8 RK3032 Chip R MCR03E2PJ331 1 R9 RK3038 Chip R MCR03EZPJ102 1 R10 RK3050 Chip R MCR03EZPJ103 1 R11 RK3066 Chip R MCR03E2PJ224 1 R12 RK3038 Chip R MCR03EZPJ102 1 R13 RK3D38 Chip R MCR03E2PJ102 1 R14 RK3038 Chip R MCR03EZPJ102 1 R15 RK3038 Chip R MCR03EZPJ102 1 R16 RK3038 Chip R MCR03E2PJ102 1 R17 RK305...

Page 28: ...0040 Cushion SPEAKER CUSHION DR41 1 HK0487 Package ITEM CARTON EJ41U 1 HP0029 Plastic bag E BAG 5X100X100 1 HP0040 Plastic bag 8X130X200 1 PF0061 SHEET SHEET EJ41U 1 PR0449 Label EJ41U LABEL 1 PS0354 Manual INSTRUCTION EJ41U 1 PS0355 Manual INST DISC EJ41U 1 UZ0030 Plug MP 013LC 1 All manuals and user guides at all guides com ...

Page 29: ...of SSG is all EMF indication If without instruction WIDE mode If without instruction SSG output is MOD 1KHz WIDE DEV 3 5KHz DEV NARROW DEV 1 75KHz DEV Standard modulation is also based above Speaker load is 8 ohm and output is 50 100 mV All manuals and user guides at all guides com ...

Page 30: ...ust so that all the indicator appears 3 T X A d ju s t m e n t S p e c ific a t io n ITEM CONDITION UNIT ADJ SPOT ADJUSTING MRTHOD HI POWER Adjustment 223 50MHz HI POWER MAIN VR103 Adjust to 25 0 1 0W MID POWER Adjustment 223 50MHz MID POWER MAIN VR104 Adjust to 10 0 1 0W LOW POWER Confirmation 223 50MHz LOW POWER MAIN Confirm if it becomes 4 5 1 0W Maximum Deviation Adjustment 223 50MHz MOD 1KHz ...

Page 31: ...e Squelch Close SSG Output OFF S Meter 223 50MHz 1KHz 3 5KHz DEV All appears at 20dBu All appears at 25dBu Decrease SSG level and decrease S Meter level AF Output 223 50MHz More than 2W More than 2W SSG Output 30dBu CTCSS Sensitivity 223 50MHz WIDE Open at 500Hz DEV Open at 500Hz DEV SSG Output OdBu 88 5Hz 223 50MHz NARROW Open at 250Hz DEV Open at 250Hz DEV DCS Sensitivity 223 50MHz WIDE Opens wh...

Page 32: ...DE 3 0 0 1KHz DEV 4 5 0 1KHz DEV 3 0 0 2KHz DEV 4 5 0 2KHZ DEV MIC in 1KHz 4mVemf MIC in 1KHz 40mVemf 223 50MHz NARROW 2 2 0 1 KHz DEV 2 2 0 2KHz DEV MIC in 1KHz 40mVemf CTCSS Modulation Level 223 50MHz WIDE 800 200Hz DEV 800 200Hz DEV 88 5Hz 3KHzLPF ON DCS Modulation Level 223 50MHz WIDE 800 50HZ DEV 800 200HZ DEV 255 Code 3KHzLPF ON 223 50MHz NARROW 600 200HZ DEV 600 300Hz DEV 1750Hz Modulation ...

Page 33: ...1 DR 235 d e n jt BLOCK DIAGRAM All manuals and user guides at all guides com ...

Page 34: ...PC BOARD VIEW 1 C P U U n it S ID E A D R 2 3 5 U P 0 5 7 9 2 C P U U n it S ID E B D R 2 3 5 U P 0 5 7 9 Bonding All manuals and user guides at all guides com ...

Page 35: ...3 MAIN Unit Side A DR 235 UP0579 All manuals and user guides at all guides com ...

Page 36: ...4 MAIN Unit Side B DR 235 UP0579 All manuals and user guides at all guides com a l l g u i d e s c o m ...

Page 37: ...0 C R TS 0 C TXD 0 N C 3 C D TR 0 N C 0 N C 0 n K F N Q L lirMul 0 o 0 m c _ C FF0 0 3 3 VELCRO A Y Z 0 1 3 1 o D H O m c_ u c Y Z 0 1 3 1 5 TNC U nit Side A U P 0 4 0 2 6 TNC U n it Side B U P 0 4 0 2 All manuals and user guides at all guides com ...

Page 38: ... sS g3fi 23 g Sg O O O O O O O O O O O O O O O O jl IO O O O O O O O O O O O Q O O O i 5 0 U c c 5 I D 73 1 ro 03 Ot SCHEMATIC DIAGRAM All manuals and user guides at all guides com ...

Page 39: ...2 MAIN Unit DR 235 All manuals and user guides at all guides com ...

Page 40: ...TNC Unit OPTION Unit EJ41U GPS P IT DATA CONECT All manuals and user guides at all guides com ...

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