Alinco DR-235 TMk III 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.

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Summary of Contents for DR-235 TMk III

Page 1: ...wing 17 LCD Connection TTR3626UPFDHN 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 ACCESS...

Page 2: ...eight Approx 1 0 Kg Transmitter 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 Spu...

Page 3: ...F amplifier Q105 then 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 IC1...

Page 4: ...ier Q6 Amplified signal 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...

Page 5: ...mp output pin 5 of IC116 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 Col...

Page 6: ...ut signal is compared with the programmed 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...

Page 7: ...P46 SCLK1 P45 TXD P44 RXD P43 sjS T0UT P42 INT2 P41 INT1 P40 P77 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 P3...

Page 8: ...obe for PLL IC 19 P45 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 I...

Page 9: ...68 P32 SEG20 S20 0 69 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 S...

Page 10: ...t j 1 2 3 CONT Function 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 3 INPUT S 1 2 3 S h a r ic i...

Page 11: ...IX IN 6 L A 4 4 2 5 A X A 0 4 1 0 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 B...

Page 12: ...A 1 1 0 3 Dual Operational 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...

Page 13: ...ift register 7 bit latch 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 P 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...

Page 14: ...g Multiplexer De multiplexer 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...

Page 15: ...100 mW Pout Output Power 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...

Page 16: ...0 XD 414 R B521S XD04 8 015AZ3 0 XD045 2SK880G R X 2 3SK293 X d053 2SK2539 X 066 i 4 M X G G 2 G l B ___Q U F b n D S AK FA1111C XL 69 FA1111C XL 77 2SA1036K x f ii 2SC4245Y xfd 25 2SB766A m m 2SC4915...

Page 17: ...V...

Page 18: ...ez 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...

Page 19: ...FF0017 EXPLODED VIEW 1 LCD Assembly ST0064...

Page 20: ...2 Top and Front View AA0050 DP0185 NK0072 KZ01D5 NK0073...

Page 21: ...3 B o tto m V ie w AA0050...

Page 22: ...6 RK3550 Chip R ERJ2GEJ103X 1 R7 RK0025 Chip R ERJ6GEYJ331V 1 R8 RK0025 Chip R ERJ6GEYJ331V 1 R9 RK3538 Chip R ERJ2GEJ102X 1 R10 RK3032 Chip R MCR 3EZPJ331 1 R11 RK3546 Chip R ERJ2GEJ472X 1 R14 RK3548...

Page 23: ...Parts Name Qtv 0204 CU4008 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 C...

Page 24: ...c Filter ALFYM450G K 1 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 XA...

Page 25: ...R226 RK3038 Chip R MCR03EZPJ102 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 ERJ2G...

Page 26: ...233 Trimmer R RH02B1C15X 100K OHM 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...

Page 27: ...Chip R MCR03EZPJ104 1 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...

Page 28: ...4 VELCRO VELCRO B 1 FG0040 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...

Page 29: ...Voltage 13 8V Output 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...

Page 30: ...cate 01 MAIN VR102 Adjust 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 VR1...

Page 31: ...pen SSG Output 1 OdBu Squelch Close 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...

Page 32: ...ion Levei 223 50MHz WIDE 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 Mo...

Page 33: ...1 DR 235 d e n jt BLOCK DIAGRAM...

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...

Page 35: ...3 MAIN Unit Side A DR 235 UP0579...

Page 36: ...4 MAIN Unit Side B DR 235 UP0579...

Page 37: ...D C D C D 3 C D S R 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...

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...

Page 39: ...2 MAIN Unit DR 235...

Page 40: ...TNC Unit OPTION Unit EJ41U GPS P IT DATA CONECT...

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