Alinco_DJ-195_serv.pdf

DJ-195 Service Manual CONTENTS SPECIFICATIONS 1) GENERAL . 2 2) TRANSMITTER . 2 3) RECEIVER . 2 CIRCUIT DESCRIPTION 1) Receiver System . 3, 4 2) Transmitter System. 4 3) PLL Synthesizer Circuit . 4, 5 4) CPU and Peripheral Circuits . 5, 6 5) M3826M8L*GP (XA0644). 68 SEMICONDUCTOR DATA 1) NMJ2070M T1 (XA210) . 9 2) AT24C16N-10SI-2.7TER (XA0368) . 9 3) M5222FP-600C (XA0385) . 10 4) TK14521MTL (XA0515). 11 5) M64082AGP (XA0543). 12 6) NJM2904V-TE1 (XA0573) . 12 7) NJM2902V-TE1 (XA0596) . 12 8) S-81250SG-QD-T1 (XA0619). 13 9) S-80845ALMP-EA9-T2 (XA0620) . 13 10) Transistor, Diode, and LED Ontline Drawings . 14 11) LCD Connection (EL0044) . 14 EXPLODED VIEW 1) Front View. 15 2) Rear View . 16 PARTS LIST MAIN Unit . 1719 Mechanical Parts . 20 Packing Parts . 20 ADJUSTMENT 1) Required Test Equipment. 21, 22 2) Adjustment Mode . 2326 PC BOARD VIEW MAIN Unit . 27 SCHEMATIC DIAGRAM. 28 BLOCK DIAGRAM. 29 ALINCO,INC. 2 SPECIFICATIONS 1) GENERAL Frequency coverageT: TX 144 147.995MHzRX 135 173.995MHz E: TX 144 145.995MHzRX 144 145.995MHz EAH : TX 135 173.995MHzRX 135 135.995MHz TFH : TX 150 173.995MHzRX 135 173.995MHz TLH : TX 150 173.995MHzRX 135 173.995MHz ModeF3E (FM) Channel steps5,10,12.5,15,20,25, one amplifier (pins 5, 6, and 7) is composed of pre- emphasis and IDC circuits and the other (pins 1, 2, and 3) is composed of a splatter filter. The maximum frequency deviation is obtained by VR202 and input to the cathode of the varicap of the VCO, to change the electric capacity in the oscillation circuit. This produces the frequency modulation. 2. Power Amplifier Circuit The transmitted signal is oscillated by the VCO, amplified by the pre-drive amplifier (Q4) and drive amplifier (Q3), and input to the final amplifier (Q2). The signal is then amplified by the final amplifier (Q2) and led to the antenna switch (D1) and low-pass filter (L5, L4, L3, L2, C16, C15, C14 and C13), where un- wanted high harmonic waves are reduced as needed, and the resulting signal is supplied to the antenna. 3. APC Circuit Part of the transmission power from the low-pass filter is detected by D6, con- verted to DC, and then amplified by a differential amplifier. The output voltage controls the bias voltage from the source of Q2 and Q3 to maintain the trans- mission power constant. 3) PLL Synthesizer Circuit 1. PLL The dividing ratio is obtained by sending data from the CPU (IC9) to pin 2 and sending clock pulses to pin 3 of the PLL IC (IC1). The oscillated signal from the VCO is amplified by the buffer (Q5) and input to pin 6 of IC1. Each program- mable divider in IC1 divides the frequency of the input signal by N according to the frequency data, to generate a comparison frequency of 5 or 6.25kHz. 2. Reference Frequency Circuit The reference frequency appropriate for the channel steps is obtained by divid- ing the 21.25MHz reference oscillation (X1) by 4250 or 3400, according to the data from the CPU (IC9). When the resulting frequency is 5kHz, channel steps of 5, 10, 15, 20, 25, 30, and 50kHz are used. When it is 6.25kHz, the 12.5kHz channel step is used. 5 3. Phase Comparator Circuit The PLL (IC1) uses the reference frequency, 5 or 6.25kHz. The phase com- parator in the IC1 compares the phase of the frequency from the VCO with that of the comparison frequency, 5 or 6.25kHz, which is obtained by the internal divider in IC1. 4. PLL Loop Filter Circuit If a phase difference is found in the phase comparison between the reference frequency and VCO output frequency, the charge pump output (pin 8) of IC1 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 Q1 directly oscillates the desired fre- quency. The frequency control voltage determined in the CPU (IC9) and PLL circuit is input to the varicaps (D32 and D34). This change the oscillation fre- quency, which is amplified by the VCO buffer (Q5) and output from the VCO unit. 4) CPU and Peripheral Circuits 1. LCD Display Circuit The CPU turns ON the LCD via segment and common terminals with 1/4 the duty and 1/3 the bias, at the frame frequency is 112.5Hz. 2. Display Lamp Circuit When the LAMP key is pressed, “H” is output form pin 50 of CPU (IC9) to the bases of Q12. Q12 then turn ON and the LEDs (D12 and D17) light. 3. Reset and Backup When the power form the DC jack or external battery increases from Circuits 0 V to 2.5 or more, “H” level reset signal is output form the reset IC (IC11) to pin 33 of the CPU (IC9), causing the CPU to reset. The reset signal, however, waits at 100, and does not enter the CPU untilthe CPU clock (X2) has stabi- lized. 4. S(Signal) Meter Circuit The DC potential of pin 8 of IC5 is input to pin 1 of the CPU (IC9), converted from an analog to a digital signal, and displayed as the S-meter signal on the LCD. 5. DTMF Encoder The CPU (IC9) is equipped with an internal DTMF encoder. The DTMF signal is output from pin 10, through R102 and R158 (for level adjust-ment), and then through the microphone amplifier (IC7), and is sent to the varicap of the VCO for modulation. At the same time, the monitor-ing tone passes through the AF circuit and is output form the speaker.6. CTCSS Encoder The CPU (IC9) is equipped with an internal tone encoder. The tone signal (67.0 to 250.3 Hz) is output form pin 9 of the CPU to the varicap (D3) of the VCO for modulation. 6 6. Tone Encoder The CPU (IC9) is equipped with an internal tone encoder.The tone signal (67.0 to 250.3Hz) is output from pin 9 of the CPU to the varicap (D3) of the VCO for modulation. 7. DCS Encoder The CPU (IC9) is equipped with an internal DCS code encoder. The code (023 to 754) is output from pin 9 of the CPU to the varicap (D3) of the PLL reference oscillator. When DCS is ON, DCS MUTE circuit (Q15-ON, Q18-ON, Q16-OFF) works. The modulation activates in X1 side only. 8. CTCSS, DCS Decoder The voice band of the AF output signal from pin 10 of IC5 is cut by sharp active filter IC8 (VCVS) and amplified, then led to pin 4 of CPU. The input signal is compared with the programmed tone frequency code in the CPU. The squelch will open when they match. 9. Clock Shift In the unlikely event that CPU clock noise is present on a particular operating frequency programmed into the radio, you can shift the CPU clock frequency to avoid the CPU clock-noise. The output signal from pin 31 of the CPU turns on Q30. Then the oscillation frequency of X2 will be shifted about 300 ppm. 5) M3826M8L*GP (XA0644) CPU Terminal Connection (TOP VIEW) 7 No.Pin Name Function I/O PULogicDescription 1P67/AN7SMTI-A/DS-meter input 2P66/AN6SQLI-A/DNoise level input for squelch 3P65/AN5BATI-A/DLow battery detection input 4P64/AN4TINI-A/DCTCSS tone input/DSC code input 5P63/SCLK22/AN3BP1I-A/DBand plan 1 6P62/SCLK21/AN2BP2I-A/DBand plan 2 7P61/SOUT2/AN1DCSWO-Activ highDCS signal mute 8P60/SIN2/AN0F/M/KEYI-A/DFunction/Moniter key input 9P57/ADT/DA2CTOUTO-D/ACTCSS tone output/DCS tone output/Tuning voltage out 10P56/DA1DTOUTO-D/ADTMF output/EVR control output 11P55/CNTR1SCLO-PulseSerial clock for EEPROM 12P54/CNTR0TBSTI/OPulse/Activ low Tone burst output/UP input while trunking 13P53/RTP1BP4I- - Band plan 4 14P52/RTP0MUTEI/O-Activ highMicrophone mute/Bank change input while trunking 15P51/PWM3CLKO-PulseSerial clock output for PLL,CTCSS,and trunking board 16P50/PWM0DATAI/O-PulseSerial data output for PLL,CTCSS, and trunking board/PLL unlock signal input 17P47/SROY1STBTI/O-Activ low/PulseTrunking board detedtion(when PSW is on)/Storobe signal to trunking board 18P46/SCLK1STBPO-PulseStrobe for PLL IC 19P45/TXDUTXO-PulseUART data transmission output 20P44/RXDRTXI-PulseUART data reception output 21P43/TOUTBEEPI/O-Pulse/Activ low Beep tone/Band plan 3(when PSW is on) 22P42I/NT2RE2IAvtiv low 23P41/INT1RE1IAvtiv low Rotary encoder input 24P40SDO-Avtiv lowSignal detection output 25P77PTTI-Activ highPTT input 26P76SDTIActiv highTrunking signal detection input 27P75P5CO-Activ lowPLL power ON/OFF output 28P74T5CO-Activ lowTX power ON/OFF output 29P73R5CO-Activ lowRX power ON/OFF output 30P72AFPO-Activ lowAF AMP power ON/OFF output 31P71CLSFTO-Activ highCLOCK frequency shift 32P70/INTOBUI-Activ lowBackup signal detection input 33RESETRESETI-Activ lowReset input 34XcinXcin- 35XcoutXcout- 36XinXin-Main clock input 37XoutXout-Main clock output 38VssGND-CPU GND 39P27PSWI-Avtiv lowPower switch input 40P26SDAO-PulseSerial data for EEPROM 41P25C5CO-Activ highC5V power ON/OFF output 42P24LAMPO-Activ highLamp ON/OFF 43P23KI0IAvtiv low 44P22KI1IAvtiv low 45P21KI2IAvtiv low 46P20KI3IAvtiv low Key matrix input 47P17KO3O-Avtiv low 48P16KO2O-Avtiv low 49P15/SEG39KO1O-Avtiv low 50P14/SEG38KO0O-Avtiv low Key matrix output 51P13/SEG37H/LO-Tx power H/L 52P12/SEG36DA2O-DA converter for output power 53P11/SEG35DA1O-DA converter for output power 54P10/SEG34DA0O-DA converter for output power 55P07/SEG33SCRI-SCR input 8 No.Pin NameFunction I/O PULogicDescription 56P06/SEG32AFCO-Activ highAF tone control 57P05/SEG31S31O- 58P04/SEG30S30O- 59P03/SEG29S29O- 60P02/SEG28S28O- 61P01/SEG27S27O- 62P00/SEG26S26O- 63P37/SEG25S25O- 64P36/SEG24S24O- 65P35/SEG23S23O- 66P34/SEG22S22O- 67P33/SEG21S21O- 68P32/SEG20S20O- 69P31/SEG19S19O- 70P30/SEG18S18O- 71SEG17S17O- 72SEG16S16O- 73SEG15S15O- 74SEG14S14O- 75SEG13S13O- 76SEG12S12O- 77SEG11S11O- 78SEG10S10O- 79SEG9S9O- 80SEG8S8O- 81SEG7S7O- 82SEG6S6O- 83SEG5S5O- 84SEG4S4O- 85SEG3S3O- 86SEG2S2O- 87SEG1S1O- 88SEG0S0O- LCD segment signal 89VccVDD-CPU power terminal 90VrefVref-AD converter power supply 91AvssAvss-AD converter GND 92COM3COM3O-LCD COM3 output 93COM2COM2O-LCD COM2 output 94COM1COM1O-LCD COM1 output 95COM0COM0O-LCD COM0 output 96VL3VL3- 97VL2VL2- LCD power supply 98C2I- 99C1C1- 100VL1VL1I-A/DLCD power supply 9 SEMICONDUCTOR DATA 1) NMJ2070M T1 (XA210) Low Voltage Power Amplifier Equivalent Circuit 2) AT24C16N-10SI-2.7TER (XA0368) 16K bits CMOS Serial EEPROM 10 3) M5222FP-600C (XA0385) Electronic Volume 11 4) TK14521MTL (XA0515) IF System 12 5) M64082AGP (XA0543) 6) NJM2904V-TE1 (XA0573) Dual Single Supply Operational Amplifier 7) NJM2902V-TE1 (XA0596) Quad Single Supply Operational Amplifier 13 8) S-81250SG-QD-T1 (XA0619) Top View 9) S-80845ALMP-EA9-T2 (XA0620) Voltage Regulator 14 10) Transistor, Diode, and LED Ontline Drawings Top View RSL135 TE11 XD0066 S3DG7 XD0261 MA2S111-TX XD0323 HSU277TRF XD331 RB706F-40-T106 XD0332 DA204U T106 XD0130 1SV214 TPH4 XD0131 MA729-TX XD0291 U2FWJ44N (TE12R) XD0294 MA741WA TX XD0251 MA741WK XD0252 MA2S30400L XD0312 MRF9745T1 XE0034 2SK2975-T11-A XE0038 2SK882-GR-TE85L XE0040 SML-310MTT86 XL0036 BRPG1201W TR XL0028 2SC4081 T106R XT0095 2SB766A-TX XT0170 2SC4808-TX. AR XT0171 2SA1036K T146Q XT110 2SD2216R-TX XT0135 2SC2915 XT0178 2SC4618 XT0172 UN9216-R-TX XU0099 XP1114 (TX) XU0161 XP1501-TX XU0172 RN2107 TE85L XU0192 RN1107 TE85L XU0193 RN1104 TE85L XU0195 RN2111 TE85L XU0194 11) LCD Connection (EL0044) SEG0 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 15 EXPLODED VIEW 1) Front View 16 2) Rear View 17 PARTS LIST Ref.Ref. C1CU3035Chip CC1608JB1H102KT-AS C2CU3035Chip CC1608JB1H102KT-AS C3CS0404Chip Tantal6MCM106MATER C4CU3012Chip CC1608CH1H120JT-AS C5CU3012Chip CC1608CH1H120JT-AS C6CU3035Chip CC1608JB1H102KT-AS C7CU3035Chip CC1608JB1H102KT-AS C8CU3035Chip CC1608JB1H102KT-AS C9CU3035Chip CC1608JB1H102KT-AS C10CU3035Chip CC1608JB1H102KT-AS C11CU3019Chip CC1608CH1H470JT-AS C12CU3015Chip CC1608CH1H220JT-AS C13CU3011Chip CC1608CH1H100DT-AS C14CU3014Chip CC1608CH1H180JT-AS C15CU3016Chip CC1608CH1H270JT-AS C16CU3085Chip CC1608CH1H300JT-AS C17CU3004Chip CC1608CH1H030CT-AS C18CU3001Chip CC1608CH1H0R5CT-AS C19CU3020Chip CC1608CH1H560JT-AS C20CU3016Chip CC1608CH1H270JT-AS C21CU3003Chip CC1608CH1H020CT-AS C22CU3035Chip CC1608JB1H102KT-AS C23CU3004Chip CC1608CH1H030CT-AS C24CU3002Chip CC1608CH1H010CT-AS C25CU3012Chip CC1608CH1H120JT-AS C26CU3015Chip CC1608CH1H220JT-AS C27CU3002Chip CC1608CH1H010CT-AS C28CU3002Chip CC1608CH1H010CT-AS C29CU3035Chip CC1608JB1H102KT-AS C30CU0108Chip CLMK212BJ105KG C31CU3047Chip CC1608JB1H103KT-N C32CU3035Chip CC1608JB1H102KT-AS C33CU3047Chip CC1608JB1H103KT-N C34CU3035Chip CC1608JB1H102KT-AS C35CU3035Chip CC1608JB1H102KT-AS C36CU0108Chip CLMK212BJ105KG C37CU3035Chip CC1608JB1H102KT-AS C38CU3027Chip CC1608CH1H221JT-AS C39CU3035Chip CC1608JB1H102KT-AS C40CU3002Chip CC1608CH1H010CT-AS C41CU3002Chip CC1608CH1H010CT-AS C42NC C43CU3035Chip CC1608JB1H102KT-AS C44CU3035Chip CC1608JB1H102KT-AS C45CU3035Chip CC1608JB1H102KT-AS C46CU0108Chip CLMK212BJ105KG C47CU3035Chip CC1608JB1H102KT-AS C48CU3035Chip CC1608JB1H102KT-AS C49CU3047Chip CC1608JB1H103KT-N C50CU3035Chip CC1608JB1H102KT-AS C51CU3047Chip CC1608JB1H103KT-N C52CS0404Chip Tantal6MCM106MATER C53CU3014Chip CC1608CH1H180JT-AS C54CU3047Chip CC1608JB1H103KT-N C55CU3035Chip CC1608JB1H102KT-AS C56CU3002Chip CC1608CH1H010CT-AS C57CU3002Chip CC1608CH1H010CT-AS C58CU3015Chip CC1608CH1H220JT-AS C59CU3007Chip CC1608CH1H060CT-A C61CU3047Chip CC1608JB1H103KT-N C62CU3111Chip CC1608JB1C104KT-N C63CS0407Chip Tantal35MC104MATER C64CU3011Chip CC1608CH1H100DT-AS C65CU3011Chip CC1608CH1H100DT-AS C66CU3035Chip CC1608JB1H102KT-AS C67CU3012Chip CC1608CH1H120JT-AS C68CU3047Chip CC1608JB1H103KT-N C69CU3057Chip CC1608CH1H130JT-AS C70CU3016Chip CC1608CH1H270JT-AS C71CU3035Chip CC1608JB1H102KT-AS C72CS0406Chip Tantal35MCM105MATER C73CU3017Chip CC1608CH1H330JT-AST.E.EAH C73CU3085Chip CC1608CH1H300JT-ASTFH.TLH C74CU3019Chip CC1608CH1H470JT-AS C75CU3018Chip CC1608CH1H3