Alinco DR-235 TMk III Service Manual
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Alinco DR-235 TMk III Service Manual

Alinco DR-235 TMk III Service Manual

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D R -
2
S e r v i c e M a n u a l
C O N T E N T S
GENERAL.........................................................
TRANSMITTER................................................
RECEIVER........................................................
1) Receiver System DR-235................................
2) Transmitter System DR-235............................
3) PLL Synthesizer Circuit DR-235......................
4) CPU and Peripheral Circuit..............................
5) Power Supply Circuit.......................................
6) M38268MCA075GP (XA1130).........................
1) NJM7808FA (XA0102).....................................
2) TC4S66F (XA0115)..........................................
3) AN8010M (XA0119).........................................
4) TC4W53FU(XA0348)......................................
5) TA31136FN (XA0404)......................................
6) LA4425A (XA0410 )..........................................
7) BR24L32FJ (XA0604Z)................... ................
8) L88MS05TLL (XA0675)....................................
9) S-816A50AMC (XA0925).................................
10) LM2904PWR (XA1103)...................................
11) LM2902PWR (XA1106)...................................
12) MB15E07SR (XA1107).....................................
13) S-80845CLNB (XA1120).................................
14) BU4052BCFV (XA1229).................................
15) S-AV40 (XA1230).............................................
16) Transistor, Diode and LED Outline Drawing...
17) LCD Connection (TTR3626UPFDHN)............
1) LCD Assembly..................................................
2) Top and Front View..........................................
3) Bottom View......................................................
T M
3
5
k I I I
2
CPU Unit................................................... 21,22
2
MAIN Unit................................................ 22-25
2
Mechanical Parts.....................................
Packing Parts...........................................
ACCESSORIES......................................
3,4
4
TNC (EJ41U)............................................
5
TNC (EJ41U) Packing Parts...................
5 6
6
7-9
1) Adjustment Spot.....................................
10
4) RX Test Specification.............................
10
5) TX Test Specification.............................
10
10
11
11
12
12
5) TNC Unit Side A (UP0402) (option)......
12
6) TNC Unit Side B (UP0402) (option).....
12

SCHEMATIC DIAGRAM

13
14
1) CPU Unit DR-235...................................
14
2) MAIN Unit DR-235..................................
15
3) TNC Unit (option)....................................
16

BLOCK DIAGRAM

17
1) DR-235....................................................
18
19
20
A U
25
25
25
25
26
27
^
28
29
30
31
32
33
33
34
34
35
35
36
37
38
39
N
C
O
,
I N C

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Summary of Contents for Alinco DR-235 TMk III

  • Page 1: Table Of Contents

    D R - k I I I S e r v i c e M a n u a l C O N T E N T S PARTS LIST S P E C IF IC A T IO N S GENERAL............

  • Page 2: Specifications

    SPECIFICATIONS ■ General Frequency coverage DR-235 216.000 ~ 279.995MHz ( RX ) TMklll 222.000 - 224.995MHz ( TX ) Operating mode FM 16K0F3E ( Wide mode ) 8K50F3E ( Narrow mode ) Frequency resolution 5 , 8.33 , 10 , 12.5 , 15 , 20 , 25 , 30 , 50 kHz Number of memory Channels Antenna impedance...

  • Page 3: Circuit Description

    CIRCUIT DESCRIPTION 1 ) R e c e i v e r S y s t e m D R - 2 3 5 The receiver system is a double superheterodyne system with a 30.85 MHz first IF and a 455 kHz second IF.
  • Page 4 5. Squelch Circuit The detected output which is outputted from the pin 9 of IC108 is inputted to pin 8 of IC108 after it was been amplified by 10120:A and it is outputted from pin 14 after the noise component was been eliminated from the composed band pass filter in the built in amplifier of the IC.

  • Page 5: Pll Synthesizer Circuit Dr-235

    3) PLL Synthesizer Circuit DR- 235 1. PLL The dividing ratio is obtained by sending data from the CPU (IC1) to pin 10 and sending clock pulses to pin 9 of the PLL IC (IC116). The oscillated signal from the VCO is amplified by the buffer (Q134 and Q135) and input to pin 8 of IC116.

  • Page 6: Power Supply Circuit

    4. S (Signal) Meter Circuit The DC potential of pin 12 of iC108 is input to pin 1 of the CPU (IC1), converted from an analog to a digital signal, and displayed as the S-meter signal on the LCD. 5. DTMF Encoder The CPU (IC1) is equipped with an internal DTMF encoder.
  • Page 7 < GO <SÎ C/O o o o o > < c ^ c ^ c o c o c / 5 c < o < / > o o c ^ o o m m m < < c < o o < Z 5 0 < ^ 3 < m m rn m rn m m rn m m c r> o o v~^ c~ ¿...
  • Page 8 Terminal Signal Description P67/AN7 S-meter input P66/AN6 Noise level input for squelch P65/AN5 Battery voltage input P64/AN4 CTCSS tone input / DCS code input P63/SCLK22/AN3 Band plan 1 P62/SCLK21/AN2 Band plan 2 P61/SOUT2/AN1 DCSW DCS signal mute P60/SIN2/AN0 Rotary encoder input P57/ADT/DA2 TOUT CTCSS tone output / DCS tone output...
  • Page 9 Term inal Signal Description P13/SEG37 DOWN Mic down input P12/SEG36 Digital unit detect P11/SEG35 Scramble IC ready signal / PTT input for 9600bps P10/SEG34 Mic up input P07/SEG33 P06/SEG32 P05/SEG31 P04/SEG30 P03/SEG29 P02/SEG28 P01/SEG27 P00/S EG26 P37/SEG25 P36/SEG24 P35/SEG23 P34/SEG22 P33/SEG21 P32/SEG20 P31/SEG19...

  • Page 10: Semiconductor Data

    SEMICONDUCTOR DATA 1 ) N J M 7 8 0 8 F A ( X A 0 1 0 2 ) 8V (1A) Voltage Regulator 1. INPUT 7808A J R C ****** 2. COMMON 3. OUTPUT 1 2 3 2 ) T C 4 S 6 6 F ( X A 0 1 1 5 ) Bilateral Switch _____ a 1.

  • Page 11: Ta31136Fn (Xa0404)

    5) TA31136FN (XA0404) Narrow Band FM IF IC 1. OSCIN It 1 5 1 4 1 3 1 2 1 1 1 0 9 2. OSC OUT 3. MIX OUT 4. Vcc 5. IF IN 6. DEC 1136 7. FILOUT 8.

  • Page 12: L88Ms05Tll (Xa0675)

    8) L88MS05TLL (XA0675) 5V (500mA) Voltage Regulator with On/Off Function I------------ 1 1. Vin 2. STB 3. GND 4. Cn 5. Vout 1 2 3 4 5 G N D 9 ) S - 8 1 6 A 5 0 A M C ( X A 0 9 2 5 ) External Transistor Type 5V Voltage Regulator with On/Off Function 1.

  • Page 13: Mb15E07Sr (Xa1107)

    12) MB15E07SR (XA1107) PLL Synthesizer 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 1. OSC IN 9. Clock 2. N. C. 10. Data 3. Vp 11. LE 4. Vcc 12. PS 5. Do 13.N .C .

  • Page 14: S-80845Clnb (Xa1120)

    13) S-80845CLNB (XA1120) 4.5V Voltage Detector 1. Vout 2. Vin 3. NC 4. GND 1 4 ) B U 4 0 5 2 B F V ( X A 1 2 2 9 ) Analog Multiplexer / De-multiplexer Y O (T if] V D D Y2 [T - Y2 INHIBIT...

  • Page 15: S-Av40 (Xa1230)

    15) S-AV40 (XA1230) 222 ~ 225MHz 30W RF Power Module B LO C K DIAG RAM G H b ® R F Input (Pin) (D Gate Voltage (VGG), Power Control ® Drain Voltage (VDD), Battery (D R F Output (Pout) ©...
  • Page 16 1 6 ) T r a n s i s t o r , D i o d e a n d L E D O u t l i n e D r a w i n g Top View M I 407 R N 731V M A2S728...
  • Page 18 Í C O M 3 C O M 2 C 0 M 1 COMO...

  • Page 19: Exploded View

    EXPLODED VIEW 1) LCD Assembly FF0017 ST0064...

  • Page 20: Top And Front View

    2) Top and Front View A A 0 0 5 0 DP0185 ‘ NK0072 KZ01D5 NK0073...

  • Page 21: Bottom View

    3 ) B o t t o m V i e w AA0050...

  • Page 22: Parts List

    PARTS LIST CPU Unit Ref No Part No. Description Parts Name Qty. Ref No. Part No. Description Parts Name Qty. GRM155B11A104KA01D RK3538 Chip R. ERJ2GEJ102X CU3554 Chip C. Chip R. ERJ2GEJ103X CU3554 Chip C. GRM155B11A104KA01D RK3550 CU3549 Chip C. GRM155B11C153KA01D RK3550 Chip R.
  • Page 23 Qty. Ref No. Part No. Description Parts Name Ref No Part No. Description Parts Name Qtv. 020 4 CU4008 Chip C. GRM31M2C2H7R0DV01L FP0034 MIC SPACER DR110 MIC SPACER A DR 135 C205 CU3035 Chip C. C1608JB1H102KT-NS FP0234 ST0064 LCD HOLDER DR135 C206 CE0339 Electrolytic C.
  • Page 24 Parts Name Qty. Ref No. Part No. Description Parts Name Qty. Ref No. Part No. Description TA31136FNG(EL) C304 CU3535 Chip C. GRM155B11H102KA01D IC108 XA0404 TC4S66F{TE85R,F) GRM155B11C103KA01D IC109 XA0115 C305 CU3547 Chip C. S-AV40(ALI,Q) 200MHZ CU3554 GRM155B11A104KA01D IC110 XA1230 C306 Chip C. GRM155B11C103KA01D BU4052BCFV-E2 C307...
  • Page 25 Parts Name Qty. Description Parts Name Qty. R ef No. Part No. Description Ref No Part No. ERJ2GEJ152X R229 RK3555 Chip R. ERJ2GEJ273X R114 RK3540 Chip R. ERJ2GEJ472X R115 RK3549 Chip R. ERJ2GEJ822X R230 RK3546 Chip R. MCR03EZPJ1D3 RK3534 Chip R. ERJ2GEJ471X R231 RK3050...

  • Page 26: Mechanical Parts

    Description Qty. Ref No. Part No. Parts Name Qtv. Ref No. Part No. Description Parts Name LCD PANEL DR235MK3 R330 RK3562 Chip R. ERJ2GEJ104X DP0185 LCD Panel ERJ2GEJ102X BLIND CLOTH DR110 R331 RK3538 Chip R. FF0015 Cloth ERJ2GEJ223X Rubber ON AIR KEY RUBBER R332 RK3554 Chip R.

  • Page 27: Tnc (Ej41U)

    TNC (EJ41U) Part No. Description Parts Name Qty. Part No. Description Parts Name Ref No. Ref No. Qtv. RK3038 Chip R. MCR03EZPJ102 ED0006 Battery BR2032-1F2 BAT1 Chip R. MCR03EZPJ102 CS 0210 Chip tantalum TMCMB0J156MTRF RK3038 CS0210 Chip tantalum TMCMB0J156MTRF RK3053 Chip R.

  • Page 28: Tnc (Ej41U) Packing Parts

    TNC (EJ41U) Packing Parts Ref No. Part No. Description Parts Name Qty. FDD001 Floppy-Disc FLOPPY-DISC FF0034 VELCRO VELCRO B FG0040 Cushion SPEAKER CUSHION DR41 HK0487 Package ITEM CARTON EJ41U HP0029 Plastic bag E.BAG 5X100X100 HP0040 Plastic bag 8X130X200 SHEET EJ41U PF0061 SHEET PR0449...

  • Page 29: Dr-235 Adjustment

    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.

  • Page 30: Vco And Rx Adjustment Specification

    2) VCO and RX Adjustment Specification CONDITION UNIT ADJ. SPOT ITEM ADJUSTING MRTHOD Adjustment 223.50MHz MAIN VR110 Adjust so that Tx Frequency becomes within 223.50MHz+/- 100Hz Frequency 224.99MHz MAIN L123 Adjust so that PD voltage becomes 2.2V Adjustment 224.99MHz MAIN Confirm if PD voltage becomes less than Confirmation 6.2V...

  • Page 31: Rx Test Specification

    4) RX Test Specification TEST ITEM CONDITION ADJ. STANDARD TEST STANDARD NOTE RX Signal 216.05MHz Less than -7dBu Less than -6dBu 12dB SINAD Sensitivity 223.50MHz Less than -8dBu Less than -7dBu 250.05MHz Less than -3dBu Less than -2dBu 223.50MHz Less than -8dBu Less than -7dBu NARROW 223.55MHz...

  • Page 32: Tx Test Specification

    5) TX Test Specification NOTE TEST ITEM CONDITION ADJ. STANDARD TEST STANDARD Tx Output 222.00MHz 25 +/- 3W Hl POWER 223.50MHz 25 +/- 1W 25 +/- 3W 224.95MHz 25 +/- 3W Tx Output 223.50MHz 10+/- 1W 10 +/- 2W MID POWER Tx Output 223.50MHz 3 ~ 6W...
  • Page 33 1) DR-235 « n j t «...

  • Page 34: Pc Board View

    PC BOARD VIEW 1 ) C P U U n i t S I D E A D R - 2 3 5 ( U P 0 5 7 9 ) 2 ) C P U U n i t S I D E B D R - 2 3 5 ( U P 0 5 7 9 ) Bonding...

  • Page 35: Main Unit Side A Dr-235 (Up0579)

    3) MAIN Unit Side A DR-235 (UP0579)

  • Page 36: Main Unit Side B Dr-235 (Up0579)

    4) MAIN Unit Side B DR-235 (UP0579)
  • Page 37 “0 G N D é C C TS C R X D C D C D C D S R C R TS C TXD C D TR ' K F N — lirMul- 0 "D VELCRO A 0 0 3 3 •u Y Z 0 1 3 1 □...
  • Page 38 ¡sS,g3fi*23|g§|||Sg O O O O O O O O O O O O O O O O j l I O O O O O O O O O O O O Q O O O | i 5 I“*»...

  • Page 39: Main Unit Dr-235

    2) MAIN Unit DR-235...

  • Page 40: Tnc Unit (Option)

    TNC Unit OPTION Unit (EJ41U) P IT DATA CONECT...

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