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Roadstar CLT-700 Service Manual
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Roadstar CLT-700 Service Manual

Roadstar CLT-700 Service Manual

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CLT-700

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Summary of Contents for Roadstar CLT-700

  • Page 1 CLT-700...
  • Page 2 1. DESCRIPTION OF EQUIPMENT 1. TYPE OF THE CIRCUIT A. BASE UNIT RECEIVER ; Double conversion superheterodyne receiver B. HANDSET RECEIVER ; Double conversion superheterodyne receiver 2. FREQUENCY AND CHANNELS A. BASE UNIT CT1+ 959.0125 – 959.9875MHz 930.0125MHz – 931.9875MHz 914.0125 –...
  • Page 3 2. CIRCUIT DESCRIPTION A. BASE UNIT 1. Power supply circuit The DC 9V from the AC adaptor is supplied to JP3 (DC modular jack). This input voltage is supplied to the main circuit through D8 (diode) and supplied to the charge circuit.
  • Page 4 Speech network adjusts a transmit signal gain and sends it to the telephone line through switching transistor Q3, bridge diode (D1, D2, D3 and D4) and modular jack JP1. 5. Sending and Receiving of data signal The sending MSK data comes out from TX_DATA of CPU (pin 43), and enters into pin 4 of U10 (compander).
  • Page 5 During the pulse comes out, the CPU makes the Q5 on by maintaining PPD_CON (pin 25 of CPU) high, in this time the switching board will acknowledge the dial clearly by the occurance of the low impedance. 10. EEPROM U6 is the EEPROM. This stores the identification code which are inherent to pair of base unit and handset to safe guard against interference.
  • Page 6 B. Base RF Section Frequencies [ CT1 ] RX VCO Base unit : f = (f - 21.7MHz) / 2 = 446.39375MHz (20CH) Handset = (f + 21.7MHz) / 2 = 490.59375MHz (20CH) LOCA L Base unit - 21.7MHz = 892.7875MHz (20CH) LOCAL Handset + 21.7MHz = 981.1875MHz (20CH)
  • Page 7 1. RX VCO circuit RX VCO circuit is configured by Q305, Q306, D302 (varicap diode), L301 (air coil), and some additional passive parts. The control voltage from pin 14 (charge pump out) of the U302 (PLL IC) is supplied to the D302 cathode through passive loop filter (C336, C337, C338, R329, R330, R331) to control the oscillation frequency.
  • Page 8 Carrier frequency is adjusted correctly by CV301. 4. Receiver RF section Modulated RF carrier from the antenna is filtered by F306 and amplified by Q304. Amplified signal is filtered again by F307. RF carrier and RX local oscillator output from Q305 are mixed at Q303 (1st mixer), then the signal is converted into the 21.7MHz (1st IF frequency).
  • Page 9 C. Handset 1. Power control circuit 3.6V DC power is supplied from the battery through JP2. U4 has 3 regulated outputs (VREG0, 1, 2) controlled by BS0, BS1 and BS2 respectively. In receiving mode, the BS0 (pin 23 of U5) becomes low, then the receiver part of RF block is supplied with the power of 3.2V from VREG0 (pin 15 of U4).
  • Page 10 5. Sending and Receiving of data signal The sending MSK data comes out from TX_DATA of CPU (pin 49), and enters into pin 4 of U2(compandor). It is modulated at RF block through the same path as audio signal. The received MSK data which is demodulated at RF block with the same manner as audio signal is going to the low path filter composed of U3B, C32, C33, C34, R30, R31 and R32.
  • Page 11 D. Handy RF Block Section The RF part of handset is same as base unit.
  • Page 12 Q308 BFQ67 BFQ67 BFQ67 VCC_VCO VCC_AMP BRF_4_2 BRF_4_3 C366 100P C371 C374 C809,C810 L301,L302 0.35*1.55*1.0+3.0R/NA 0.35*1.45*1.0+3.0R/NA Q306 2SC5620 2SC4226 FOR M/P ROADSTAR CLT-700 Title CT1 BASE UNIT RF Size Document Number CT1_VISION_BRF_ 4_3 Custom Date: Thursday, February 22, 2001 Sheet...
  • Page 13 R102 R103 680R VCC_AMP CHARGE VCC_VCO RSSI_H/L RSSI_DETECT TCET1103K TX_DATA PLL_STB CHG-1 PLL_DATA PLL_CLK DEMOD_AUDIO DBL324V MOD_AUDIO PCB1 MOD_AUDIO TX_BIAS CTR37 & CTR38 FOR_M/P_ROADSTAR_2001-2 ROADSTAR CLT-700 Title BASE MAIN Size Document Number ita_vision_b4_2 R Date: Sheet Friday, March 23, 2001...
  • Page 14 RSSI_H/L PLL_STB PLL_DATA VREG2 10U/10V(T) 10U/10V(T) 100P PLL_CLK PGM/CALL TRANS DEMOD_AUDIO MOD_AUDIO (CT1) CT1/+ REDIAL (CT1+) (ENABLE) (DISABLE) CTR37 & CTR38 FOR_M/P_ROADSTAR_2001_02 ROADSTAR CLT-700 Title HANDSET MAIN - CT Size Document Number ct1_vision_h 4_2R Date: Sheet Friday, March 23, 2001...
  • Page 15 C368 C372 Q309 Q310 Q308 BFQ67 BFQ67 2SC4226 VREG1 VCC_AMP HRF_4_1 HRF_4_2 220N(10%) C337 470N(10%) C340 C372 C809,C810 R329 L301,L302 0.35*1.55*1.0+3.0R/NA 0.35*1.45*1.0+3.0R/NA FOR M/P ROADSTAR CLT-700 Title CT1 HANDSET RF Size Document Number CT1_VISION_HRF_4_2 Date: Thursday, February 22, 2001 Sheet...

  • Page 20: Electrical Parts List

    6. ELECTRICAL PARTS LIST VISION BASE MAIN - ITALY Revised: Friday, March 23, 2001 Item Part Quantity Reference SA41-403-3B ADAPTOR1 RF1,L1,CHG-1,CHG+1,TP2, SW2,SG2,TP3,LD3,J3,TP4, J4,DZ4,TP5,J5,TP6,LD6, TP7,LD7,TP8,J8,TP9,J9, TP10,TP11,C16,C21,R25, R27,R35,R40,C73,R80,J302, R630,C816,TP839 470N/250V(ME) 0R(2012) J1,J2,C2,J6,J7 1N/100V(PE) C5,C6 100N C9,C35,C51,C57,C58,C60, C61,C67,C77 C10,C27,C34,C46,C50,C72, C75,C80,C81,C82 220N(10%) C13,C11 100N(10%) C12,C18 C14,C28,C47 220P...
  • Page 21 AR-623PC-4 AR-623PC-DEC-4 LT344002Fe4 LT184002Fe4 LT134002Fe4 LAL04TB270K L2,L3,L4,L5 PCB-BASE PCB1 KRC106S MMBTA42 Q2,Q4,Q314 KTA1277Y KTC3876Y KRA105S Q9,Q8 KTA1505Y Q10,Q11,Q12 KTC4374Y Q313 HR93 DC09H TMC3KJB50KTR RV3,RV1 TMC3KJB500TR 22K(AXIAL) 15K(AXIAL) 20K(AXIAL) R4,R99 R6,R9,R12,R30,R31,R36, R39,R61,R62,R87,R90,R92, R93,R94,R95,R98,R101, R623 470K R7,R63,R68 220R R11,R10 120K 150R 560R R16,R17,R97,R628,R629 390R R23,R22...
  • Page 22 R59,R74 220K R70,R71 68R(3225) R100 680R R102 R103 8R2(3216) R104 R632 R633 R638 ERZV07D331 TM114B STIT1+2M+US4/6 TEL-LINE1 DBL5021V TCET1103K U2,U11 HT9200A-8DIP/SOP TMP87C807U-3A92 CSI93C46S 100 DBL324V 101 KIA7805P 102 DBL5015V 103 3M579545 HC-49/U...
  • Page 23 CT1 BASE UNIT RF Revised: Thursday, February 22, 2001 Item Part Quantity Reference TP301,BASE MAIN301, ANT301,TP302,C319,C322, C323,C327,C348,C366,C378, C379 ECRJA010A11X CV301 C301,C320,C355 C302,C314,C326,C812 100N C303,C304,C312 C305 560P C310,C813 C344,C311 470N C313 10U/10V(T) C318,C315 C316,C339,C349,C350,C360, C368 100P C317,C325,C346,C352,C357, C365,C369,C373 C321,C338 C324,C342,C377 C328,C329,C330,C331,C356 C332,C351,C370,C375 C334,C333 C335...
  • Page 24 BFQ67 Q303,Q304,Q307,Q308,Q309, Q310 2SC5620 Q305 2SC4226 Q306 KTC4075Y Q312 R301 R302,R310,R321 R306 470K R311,R307 TMC3KJB100KTR R308 R309,R324,R341,R343,R344 R312,R325 220K R313,R625 680R R314 R315,R317,R337 R318 R319 R320 R322 R323,R335,R345 R326,R327,R328 R338,R329 R330,R339 390K R331,R340 R332 910R R333 R334 100R R336 300R R342 220R R346...
  • Page 25 HANDSET MAIN - CT 1 Revised: Friday, March 23, 2001 Item Part Quantity Reference 3/CP300H MSG1216 TP1,SW1,RF1,K1,CHG-1, CHG+1,TP2,P2,K2,TP3,K3, TP4,K4,TP5,K5,TP6,K6,TP7, K7,K8,K9,K10,K11,K12,K13, K14,K15,K16,K17,K18,K19, R53,R56,R61,R62,R63,H83, R353,R354,C811 C1,C4,C8,C12,C24,C25,C26, C38,C41 100P C2,C40,C48 100N C3,C7,C17,C23,C30,C37, C39,C44,C45,C50,C51 C5,C6,C16,C29,C31,C35, C49,C808 C9,C10,C11 180P C15,C33,C34 150P 0R(2012) 10U/10V(T) C36,C42,C43 C47,C46 LS4148 D1,D2 53014-0210...
  • Page 26 100K R1,R4,R28,R44,R45,R46, R6,R19,R23,R38,R48,R50, R54,R55,R64 R7,R8,R12,R13,R35,R36, R9,R14 220K R10,R27,R33 R20,R25 R21,R352,R627 R29,R30,R31,R32 R39,R42 R40,R43 U2815032 NJM2113M,(E) DBL5015V DBL324V TA31086F TMP87CH20F-3A91 CSI93C46S 3M579545ATS-49/U...
  • Page 27 CT1 HANDSET RF Revised: Thursday, February 22, 2001 Item Part Quantity Reference TP301,HANDSET MAIN301, ANT301,TP302,C327,C348, C356,C371,C374,C378,C379 ECRJA010A11X CV301 C301,C338,C355,C812 C302,C314,C326,C373 100N C303,C304,C312 C305 560P C310 C344,C311 470N C313 10U/10V(T) C318,C315 C316,C339,C341,C349,C350, C358,C360,C367 100P C317,C325,C346,C352,C357, C365,C366,C369 C319,C340,C359,C361,C377 C320 C321,C336,C353 C322,C347,C368,C809,C810 C323 C324,C345,C363,C364 C328,C329,C330,C331 C332,C351,C370,C375...
  • Page 28 KTC4075Y Q312 R301 R302 R312,R306 470K R311,R307 TMC3KJB100KTR R308 R309,R324,R332,R341,R343 R310 220K R313 330R R314 R315,R317,R335,R337 R318,R320 R319,R323 R349,R321 R322 R325,R626,R631 R326,R327,R328 R329 R330,R339 390K R331,R340 R333 R334 100R R336,R346 R338 300R R342 R344 R345 R347,R351 R348 R350 R624 560K R625 5DL-C5001S T301...
  • Page 29 7. MECHANICAL PARTS LIST DATE : 2001.3.3 MODEL: CLT-700 BRAND:ROADSTAR COUNTRY:ITALY HANDSET NAME SPEC Drawn NO. Q'ty REMARK FRONT COVER,REMOTE ABS94HB VS-R01(RD) SILK FELT Ø27 VS-R02 ASS'Y, RECEIVER VS-R03 RECEIVER CABLE ASS'Y VS-R25 CUSHION,RECEIVER 17x11x1.5t VS-R04 KEYPAD SILICONE VS-R05 PCB, REMOTE FR-4(t=1.2)
  • Page 30 BASE UNIT NAME SPEC Drawn NO. Q'ty REMARK TOP COVER, BASE ABS94HB VS-B30(RD) SILK LED LENS ACYLE VS-B31 BASE COVER,BASE ABS94HB VS-B32(RD) SILK PAGING KNOB ABS94HB VS-B33(RD) PCB, BASE FR-4(t=1.6) VS-B34 ANTENNA TUBE URETHANE VS-R07 ANT. COIL, BASE PBSW VS-B36 NIKEL-P SHIELD CASE, BOTT.