Superstar_4900B_serv.pdf

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1、 Super Star 4900B Service Manual This is a on going project to document the Superstar 4900B. I started working on this manual Dec 2000. You can display and print it but publication on the web and commercial use are not allowed. If you have test equipment and a 4900B or can help in technical writing

2、and/or research and would like to help on this project go to the CBTricks Message Board and look for the Superstar documentation Discussion Group. This manual is by no way complete. Rev. History Rev. # 1.0 (a) Put up on the site Rev. # 1.1 (a) Worked on the Alignment hook-up diagrams. (b) Put the pa

3、rts lists with the board layouts (c) Made a change to alignment layout (d) Put a picture of the radio on first page. (e) Schematic of the ASC PCB. Rev. #1.2 (a) Schematic of MIC PCB (b) Board Layouts MIC PCB (c) AMC Mod Information Next I need to work on the following sections. Alignment Procedure E

4、xport Frequency Modification Parts List Circuit descriptions Semiconductor Information Index page and index all the pages www.CBT SPECIFICATIONS GENERAL FREQUENCY COVERAGE 28.000 TO 29.690 MHz (10 METER BAND) 23.000 TO 29.600MHz (10 METER EXPENDED.) 26.965 TO 27.405MHz (CITIZEN BAND) 23.815 TO 30.55

5、5MHZ (600CHANEL CB BAND) FREQUENCY GENERATION BY MEANS OF PLL SYNTHESIZER FREQUENCY STABILITY 0.001% OPERATING TEMPERATURE -10C TO +55C POWER SOURCE REQUIREMENTS AC 120V/5OHz or DC 16V ANTENNA IMPEDANCE 50 ohm Unbalanced MIC IMPEDANCE 2000 OHM RECEIVER SECTION CIRCUIT TYPE DUAL CONVERSION SUPERHETER

6、ODYNE IF FREQUENCY 1st IF: 10.695MHz, 2nd IF : 455KHz SENSITIVITY FM: 0.5uV FOR 20dB SINAD, With CCITT FILTER AM: 0.7uV FOR 10dB NQ SSB:0.15uV FOR 10dB NQ SPURIOUS Mode: Receive Volume: Optional Squelch : Optional CH Selector: 1 FM ANT1 Frequency counter to output pin 3, 4 of IC-7. (Figure-1) 4MHZ 1

7、00Hz 2 CPU Voltage Check; Mode: Receive Volume: Optional Squelch : Optional CH Selector: Optional FM ANT1 Connect DC volt. meter to PIN 3 of IC-10. (Figure-2) Indication on DC voltmeter must be 5.0 - 6volt. 2) Transmitter Section STEP SETTING CONNECTION ADJUST ADJUST FOR 1 RF Driver Stage; Mode : Tr

8、ansmit Volume: Optional Squelch : Optional CH Selector:19 AM ANT1 Without modulation Connect oscilloscope probe to base of Q72 (Figure-3) T216 T217 T218 T219 T220 Adjust for Maximum waveform on the oscilloscope. 2 RF Power Stage; ANT1 Mode : Transmit ANT 1 selected Volume: Optional Squelch : Optiona

9、l CH Selector:19 AM Without modulation Connect dummy load and RF power meter to the external ANT1 Jack on the set (Figure-4) L21 Power volume max. Adjust for max. Indication on the power meter. 3 RF Power Stage; ANT2 Mode : Transmit ANT 2 selected Volume: Optional Squelch : Optional CH Selector:19 A

10、M Without modulation Connect dummy load and RF power meter to the external ANT2 Jack on the set (Figure-4) Check for the same output as in step 2 4 Second harmonic Check; Mode: Transmit ANT 1 selected Volume: Optional Squelch : Optional CH Selector: 19 AM Without modulation Connect RF power meter wi

11、th dummy load to spectrum analyzer through coupler/-40dB atten. to EXT-ANT 1 Jack on the set (Figure-5). At no modulation, Compare the level of fundamental freq- spectrum to the level of harmonic freq- spectrum. Suppression of the 2nd harmonic Freq. level must be lower than -60dB. Check for the othe

12、r channels 5 Frequency Check; Mode : Transmit ANT 1 selected Volume: Optional Squelch : Optional CH Selector: 19 FM ANT1 Connect dummy load and frequency counter through coupler to RF power meter. Also connect power meter to ANT1 jack on the set. (Figure-6) RV3 T214 Make sure that the Indication of

13、the Transmitter freq. Is 27.965 Mhz 300Hz on the frequency counter. 6 MAX Deviation Check; Mode : Transmit ANT 1 selected Volume: Optional Squelch : Optional CH Selector: 19 ANT1 Change: FM OR AM Connect dummy load and modulation meter through coupler to RF power meter. Also connect power meter to E

14、XT-ANT 1 Jack on the set. (Figure-7) VR401 RV7 RV5 VR850 Adjust RV7so that the indication of the modulation analyzer is 90% with 5% tolerance at high power mode. Adjust RV5 so that the indication of the deviation analyzer is 2.0KHz 0.2KHz tolerance at high power mode 3) Receiver Section STEP SETTING

15、 CONNECTION ADJUST ADJUST FOR 1 RX Sensitivity; Mode: Receiver Volume: Fully clockwise Squelch: Turn to counterclockwise CH Selector:19 SSG : 27.185MHz,1KHz, 1uV(-107dBm) (AM) 60% MOD (FM) 1.2kHz 0EV Connect RF signal generator to external ANT. Jack. Connect SSVM, Sinadder, Oscilloscope and distorti

16、on meter across EXT-Speaker out jack with 8 dummy load (Figure-8) (FM) T201 T202 T203 T204 T205 (AM) T206 T207 T208 Adjust the parts of tuning circuitry with observing ADM(Automatic Distortion Meter) indicates 20dB SINAD in AM mode, and adjust output level of RF-SSG until speaker out level reaches a

17、bout 500 miliwatt (2.0Volt) Adjust for Maximum indication on SSVM 2 Squelch Adjustment; Mode: Receiver Volume: 500mW (2.0V) Squelch : TIGHT CH Selector:19 SSG: 27.185MHz, 1KHz 1 mV(-47dBm) (AM) 60% MOD (FM) 1.2kHz_DEV Connect RF signal generator to external ANT. Jack. Connect RF power meter and dist

18、ortion meter Across EXT-Speaker out jack with 8 dummy load (Figure-8) RV2 At each mode, Adjust the point until the audio output appeared on oscilloscope. 3 Signal Meter Adjustment; Mode: Receiver Volume: 500mW (2.0V) Squelch: Turn to counterclockwise CH Selector: 19 SSG : 27.185MHz, 1KHz, 1.2KHz DEV

19、 100uV (-67dBm) Connect RF signal generator to external ANT. Jack. Connect RF power meter and distortion meter across EXT-Speaker out jack with 8 dummy load (Figure-8) RV1 Adjust so that the 9th LCD Bar display on the LCD 4 ASC Adjustment; Mode: Receiver Volume: 500mW (2.0V) Squelch: Turn to counter

20、clockwise CH Selector:19 SSG : 27.185MHz, 1KHz, 1.2KHz DEV. 0.5 V (-113dBm) Connect RF signal generator to external ANT. Jack. Connect SSVM, Sinadder, Oscilloscope and distortion meter across EXT-Speaker out jack with 8 dummy load (Figure-8) Inside on the ASC BD At each mode, Adjust the point until

21、the audio output appeared on oscilloscope. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 SS4900 AMC Limiter Modification To open the AMC (Automatic Modulation Control) circuit, locate Q43 (SMD) in grid location G1 on the main PCB. Carefully unsolder and lift the center pin

22、up from the PCB, or remove the part entirely. Export Frequency Modification Microphone Wiring Information: Original Microphone Wiring Diagram: Pin # Description (1) Mic Audio (White) (2) Receive (Black) (3) Transmit (Red) (4) Ch Down/Ch Up (Blue) (5) Ground (Shield) (6) + 13.8 VDC (Green) (See Note

23、Below) Warning: When wiring alternative microphones to this unit, Do Not short pin 6 to any other pins on the connector or damage to the unit may occur. Many service techs often short these pins to determine the mic wiring config. Shorting the 13.8VDC on pin 6 to other pins such as pin 4 may result

24、in damage to the Microprocessor or Power Supply in the unit. Astatic TUG9D104 Wiring: Pin # Description (1) White (2) Black (3) Red (4) N/C (5) Blue & Shield (6) N/C Yellow N/C Cobra CA-72 Power Desk Mic Wiring: Pin # Description (1) Red (2) Blue (3) White (4) N/C (5) Black & Shield (6) N/C Sure 526

25、T Base Mic Wiring: Pin # Description (1) White (2) Black (3) Red (4) N/C (5) Blue & Shield (6) N/C Yellow N/C Semiconductor Lead Identification And Internal Diagrams ICs ASC PCB IC-1 NJM324 M Main PCB IC-1 MC3361 (SMD) Main PCB IC-2 KIA324F Main PCB IC-4 Main PCB IC-5 Main PCB IC-6 KT3170 1 IN + Non

26、 inverting input of the op amp. 2 IN - Inverting input of the op amp. 3 GS Gain Select. 4 VREF Reference Voltage output 5 IIN Input inhibit 6 PDN Control input for the stand-by power down mode. 7, 8 OSC1 OSC2 Clock input/output. 9 GND Ground pin. 10 OE Output Enable input. 11 - 14 Q1 - Q4 Three stat

27、e data output. 15 DSO Delayed Steering Output 16 ESO Early Steering Outputs 17 SI / GTO Steering Input/Guard Time Output 18 VDD Power Supply Main PCB IC-7 TMP87CM21DF CPU Pin Assignment NO. PIN NAME REMARK DESCRIPTION ACTIVE 1 VSS GROUND 2 XOUT 4.0MHz HIGH FREQUENCY CLOCK OUT 3 XIN 4.0MHz HIGH FREQU

28、ENCY CLOCK IN 4 RESET RESET INPUT HIGH 5 P22 (XOUT) OPEN DRAIN DIMMER OUT1 6 P21 (XTIN) OPEN DRAIN DIMMER OUT2 7 TEST FOXED TO LOW (GROUND) 8 P20 (INT5/STOP) OPEN DRAIN MODE IN (IN) 9 P40 (INT3/TC3) TRI STATE N.C 10 P41 (PWM/PDO) TRI STATE BEEP TONE OUT FOR 1750HZ(OUT) 11 P42 (SCK1) TRI STATE SQ OUT

29、 (OUT) HIGH: SQ ON 12 P43 (S11) TRI STATE ASC CONTROL (OUT) HIGH: ASC ON 13 P44 (S01) TRI STATE ANL CONTROL (OUT) ACTIVE “H” 14 P45 (SCK2) TRI STATE NB CONTROL (OUT) ACTIVE “H” 15 P46 (S12) TRI STATE MODE IN (IN) 16 P47 (S02) TRI STATE DTMF ENCODER ENABLE (OUT) 17 P10 (INT0) TRI STATE ROTARY CHANNEL

30、 UP (IN) ACTIVE “L” 18 P11 (INT1) TRI STATE ROTARY CHANNEL DN (IN) ACTIVE “L” 19 P12 (INT2/TC1) TRI STATE DTMF ENCODER ENABLE (OUT) 20 P13 (DVO) TRI STATE TX OUT (OUT) ACTIVE “H” 21 P14 (PPG) TRI STATE LC7152 DI (OUT) 22 P15 (TC2) TRI STATE LC162 CLK (OUT) 23 P16 TRI STATE LC7152 ENABLE (OUT) 24 P17

31、 TRI STATE LC7152 LDA (OUT) 25 P30 OPEN DRAIN EEPROM DATA 26 P31 OPEN DRAIN EEPROM CLOCK 27 P32 OPEN DRAIN FREQUENCY SHIFT 0.5KHz (OUT) ACTIVE “H” 28 P33 OPEN DRAIN FREQUENCY SHIFT 1KHz (OUT) ACTIVE “H” 29 P34 OPEN DRAIN FREQUENCY SHIFT 2KHz (OUT) ACTIVE “H” 30 P50 (AIN0) TRI STATE MODULATION LEVEL

32、IN (A/D) (IN) 31 P51 (AIN1) TRI STATE SIGNAL LEVEL IN (A/D) (IN) ACTIVE “H” 32 P52 (AIN2) TRI STATE SWR LEVEL IN (A/D) (IN) 33 P53 (AIN3) TRI STATE AC LEVEL IN (IN) 34 P54 (AIN4) TRI STATE N.C 35 P55 (AIN5) TRI STATE MIC (PTT, UP, DN) (A/D) (IN) 36 P56 (AIN6) TRI STATE MIC (MON,P1, P2, P3) (IN) TABL

33、E 37 P57 (AIN7) TRI STATE EMG SELECTOR (IN) “H”: EMG 19 “L”: EMG 9 38 VASS ANALOG INPUT MODEL SELECTOR 3 IN (IN) 39 VAREF ANALOG INPUT AD REFERENCE HIGH VILTAGE 40 VDD ANALOG INPUT VDD 41 P70 (SEG31) OPEN DRAIN LC7584 DATA OUT (OUT) 42 P71 (SEG30) OPEN DRAIN LC7584 DATA IN (OUT) 43 P72 (SEG29) OPEN

34、DRAIN LC7584 CLOCK (OUT) 44 P73 (SEG28) OPEN DRAIN LC7584 CHIP ENABLE (OUT) 45 P74 (SEG27) OPEN DRAIN MODE IN TABLE 46 P75 (SEG26) OPEN DRAIN MODE IN TABLE 47 P76 (SEG25) OPEN DRAIN MODE IN TABLE 48 P77 (SEG24) OPEN DRAIN MODE IN TABLE 49 SEG23 (P60) DTMF IN/OUT 50 SEG22 (P61) DTMF IN/OUT 51 SEG21 (

35、P62) DTMF IN/OUT 52 SEG20 (P63) DTMF IN/OUT 53 SEG19 (P64) ANT SELECTOR (OUT) “L” ANT 1 “H” ANT2 54 SEG18 (P65) MOD OUT (OUT) ACTIVE “H” 55 SEG17 (P66) N.C 56 SEG16 (P67) N.C 57 SEG15 (P90) HI-CUT OUTOUT (1) (OUT) 58 SEG14 (P91) HI-CUT OUTOUT (2) (OUT) 59 SEG13 (P92) HI-CUT OUTOUT (4) (OUT) 60 SEG12

36、 (P93) HI-CUT OUTOUT (8) (OUT) 61 SEG11 N.C 62 SEG10 N.C 63 SEG9 N.C 64 SEG8 N.C 65 SEG7 N.C 67 SEG5 N.C 68 SEG4 N.C 69 SEG3 N.C 70 SEG2 N.C 71 SEG1 N.C 72 SEG0 N.C 73 COM 3 N.C 74 COM 2 N.C 75 COM 1 N.C 76 COM 0 N.C 77 VLC N.C 78 N.C N.C 79 N.C N.C 80 N.C N.C Main PCB IC-8 X24C02 PIN DESCRIPTION A0

37、 A1 A2 Address Inputs SDA Serial Data SCL Serial Clock WC Write Control VSS Ground VCC Supply Voltage Main PCB IC-9 LC7152M Symbol PIN Function Symbol PIN Function PIB 16 Side-B oscillator signal input PDB2 23 Sub charge pump XIN 1 Crystal oscillator PDB1 22 Main charge pump XOUT 24 AIB 21 PIA 14 Si

38、de-A oscillator signal output AOB 20 Low-pass filter transistors VDD 17 Power supply OUTB 19 General-purpose output port VSS 15 Ground LDA 6 Side-A unlock detection CE 2 Chip enable PDA2 9 Sub charge pump CL 3 Clock PDA1 10 Main charge pump DI 4 Serial data input Data AIA 11 TEST 8 IC Test AOA 12 Lo

39、w-pass filter transistors NC 7, 18 No connections OUTA 13 General-purpose output port LDB 5 Side-B unlock detection Main PCB IC-10 78L05 (SOT-89) Main PCB IC-11 KIA7217AP Main PCB IC-12 TDA6130-5 Main PCB IC-13 KIA7045F Main PCB IC-14 KIA7810 (TO-220) Front PCB IC-401 LC75854W Semiconductor Lead Ide

40、ntification And Internal Diagrams Transistors SMT Transistors (SOT23) NPN PNP KRC107 KRA102S KRC110S KRA104 KTC3878 KTA1504S KTC3879 KTC3880S Device Mark PNP KRA102S PB KRA104 PD KTA1504S AS NPN KRC107 NH KRC110S NK KTC3878 F KTC3879 R KTC3880S AQ Transistors KTA1940 2SC 1969(CH) 2SC 2166 Semiconduc

41、tor Lead Identification And Internal Diagrams Diodes SS4900 Main PCB Component Layout SS4900 Main PCB Top Pattern SS4900 Main PCB Bottom Pattern MAIN PCB 8022902S ASSY MAIN BD 1 80229028 ASSY MAIN SMD 1 REF. LOC DESCRIPTION SPECIFICATION CODE NO. IC-1 D5 IC MC3361 (SMD) 11610044 IC-2 C4 IC KIA324F (

42、SMD) 1161004S IC-3 E5 IC UPC1037AH 11610050 IC-4 F1 IC OP-AMP KIA4558F 11610003 IC-5 G3 IC K558015 11610041 IC-6 G4 IC KT3170 11610042 IC-7 G5 IC TMP87CM21DF 11610046 IC-8 G5 IC- EEPROM X24C02F 2KBIT SMD 11620002 IC-9 G6 IC LC7152M 11610047 IC-10 F4 IC- REGULATOR 78L05,SOT-89 11710002 IC-11 D1 IC-AU

43、DIO KIA7217P 11720002 IC-12 D7 IC TDA6130-5 11610043 IC-13 H5 IC RESET KIA704SF 11610005 IC-14 E1 IC KIA7810 (TO-220) 11610049 REF. LOC DESCRIPTION SPECIFICATION CODE NO. Q1 C5 TR-PNP KRA102S 13010005 Q2 C4 TR-NPN KRC102S 13210006 Q3 C5 TRASISTOR KTC3878 13210044 Q4 C5 TRASISTOR KTC3878 13210044 Q5

44、C5 TR-FET KTK211GR 13410001 Q6 C5 TR-PNP KTA1504S 13010004 Q7 D6 TR-NPN KTC3880S 13210002 Q14 D3 TR-NPN KRC102S 13210006 Q16 D4 TR-NPN KRC102S 13210006 Q17 F3 TR-NPN KTC3875S 13210009 Q18 B4 TR-NPN KTC3880S 13210002 Q19 B5 TR-NPN KTC3880S 13210002 Q21 B5 TR-NPN KRC112S 13210011 Q22 C6 TR-NPN KTC3880

45、S 13210002 Q23 D6 TR-NPN KTC3880S 13210002 Q24 E5 TRASISTOR KTC3878 13210044 Q25 E5 TRASISTOR KTC3878 13210044 Q26 E4 TRASISTOR KTC3878 13210044 Q27 E4 TRASISTOR KTC3878 13210044 Q28 E4 TRASISTOR KTC3878 13210044 Q29 E3 TR-NPN KRC110S 13210001 Q31 D3 TR-NPN KRC112S 13210011 Q32 G6 TR-NPN KTC3880S 13

46、210002 Q36 F6 TR-NPN KTC3880S 13210002 Q37 F6 TR-NPN KTC3880S 13210002 Q38 F6 TR-NPN KTC3880S 13210002 Q39 F1 TR-NPN KRC102S 13210006 Q41A F5 TR-NPN KRC110S 13210001 Q42 B4 TRASISTOR KTC3878 13210044 Q43 G1 TR-PNP KTA1504S 13010004 Q44 G1 TR-NPN KTC3875S 13210009 Q45 H5 TR-NPN KRC102S 13210006 Q46 H

47、5 TR-NPN KRC102S 13210006 Q47 H4 TR-NPN KRC102S 13210006 Q48 H4 TR-NPN KRC102S 13210006 Q50 F1 TR-PNP KRA102S 13010005 Q53 E5 TR-NPN KTC3880S 13210002 Q55 E2 TRANSISTOR KTC200, TO-92 13210046 Q57 E2 TR-NPN KRC112S 13210011 Q58 E1 TRANSISTOR KTA200, TO-92 13210047 Q59 C3 TR-NPN KRC110S 13210001 Q60 G

48、4 TR-NPN KRC102S 13210006 Q61 E1 TRANSISTOR KTC3205, TO-92L 13210048 Q62 D2 TR-NPN KRC110S 13210001 Q63 D1 TR-NPN KTC3875S 13210009 Q64 B3 TR-NPN KTC3875S 13210009 Q65 A2 TRANSISTOR KTA1940 13220014 Q66 A2 TRANSISTOR KTA200, TO-92 13210047 Q67 A2 TRANSISTOR KTC200, TO-92 13210046 Q68 B2 TR-NPN KTC3875S 13210009 Q69 B7 TRANSISTOR KTC3879 13210050 Q71 B7 TRNPN 2SC2314 13220003 Q72 A7 TRANSISTOR 25C2166(C) 13220013