SONYicb_u655 电路图 维修原理图.pdf

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1、MICROFILM SERVICE MANUAL FRS TWO-WAY RADIO US Model SPECIFICATIONS ICB-U655 Photo: Yellow model Ver 1.22000. 07 With SUPPLEMENT-1 (9-926-965-81) RadioFans.CN 2 TABLE OF CONTENTS 1.SERVICING NOTES.3 2.GENERAL Before You Begin .4 Features .4 Precautions .4 Power Sources.5 Operation .5 Other features .

2、5 3.DISASSEMBLY.6 4.ELECTRICAL ADJUSTMENTS.7 5.DIAGRAMS 5-1.Block Diagram .9 5-2.Printed Wiring Boards . 12 5-3.Schematic Diagram . 15 5-4.IC Pin Function Description . 22 6.EXPLODED VIEWS. 24 7.ELECTRICAL PARTS LIST. 26 Flexible Circuit Board Repairing Keep the temperature of the soldering iron aro

3、und 270 C dur- ing repairing. Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). Be careful not to apply force on the conductor when soldering or unsoldering. Notes on chip component replacement Never reuse a disconnected chip component. Notice that the minu

4、s side of a tantalum capacitor may be dam- aged by heat. RadioFans.CN 3 SECTION 1 SERVICING NOTES About special screws Special screws are used for this machine not to be remodeled the inside by any users. Therefore, repair should be done with the driver described below. 7-721-052-08special driver Dr

5、ip-proof treatment Always perform the following treatment when the Cabinet was removed, or the Contact Board (ANT) Assembly was removed during repair. 1.Apply SONY Grease SGL-505 (7-662-010-04) to entire sur- face of Cabinet Rear Assembly marked with using a swab. (See Fig. A) 2.Apply Sealant TSE-39

6、2W (7-432-950-03) to entire surface of Cabinet Rear Assembly marked with using a swab. (See Fig. A) 3.Apply SONY Grease SGL-505 (7-662-010-04) to entire sur- face of Cabinet Rear Assembly marked with using a swab. (See Fig. B) cabinet (front) assycabinet (rear) assy Apply grease (SGL-505). Apply gre

7、ase (SGL-505). contact plate (ANT) assy cabinet (rear) assy Apply sealant (TSE-392W). (FIg. A) (FIg. B) RadioFans.CN 4 SECTION 2 GENERAL This section is extracted from instruction manual. RadioFans.CN 5 RadioFans.CN 6 CABINET (FRONT) ASSY Note: Follow the disassembly procedure in the numerical order

8、 given. SECTION 3 DISASSEMBLY 8cabinet (front) assy 2Open the lock (battery). 5four special screws (2 6) 4special screw (2 8) 1clip 3lid battery case 7cover (guard) 6two screws (1.7 5) 3Open the packing (MIC/SP). 2Remove the solder of two battery leads. 1Remove the solder of two speaker leads. 3flex

9、ible board 5RF board 1knob (VOL) 2packing (jack) micro computer board 4two screws (P1.7 2.5) MICRO COMPUTER BOARD RF BOARD RadioFans.CN 7 0 dBm=0.775 V Carrier Frequency of each channel (Frequency intervals are 25 kHz at each channel, but the interval between 7ch and 8ch is 4.85 MHz) 1ch : 462.5625

10、MHz8ch : 467.5625 MHz 2ch : 462.5875 MHz9ch : 467.5875 MHz 3ch : 462.6125 MHz10ch : 467.6125 MHz 4ch : 462.6375 MHz11ch : 467.6375 MHz 5ch : 462.6625 MHz12ch : 467.6625 MHz 6ch : 462.6875 MHz13ch : 467.6875 MHz 7ch : 462.7125 MHz14ch : 467.7125 MHz PLL Reference Frequency Adjustment Setting: Procedu

11、re: 1.Turn the power ON, and set to 8ch. 2.Set to receive state. 3.Adjust C53 on the RF board so that the frequency counter read- ing become 467.5625 MHz Specification Values: 467.56235 to 467.56265 MHz Adjustment Location: RF board (See page 8) TX Power Adjustment Setting: Procedure: 1.Turn the pow

12、er ON, and set to 8ch. 2.Press the TALK button (S107) on the MICRO COMPUTER board continuously and set to transmit state. 3.Adjust RV107 on the MICRO COMPUTER board so that the power meter reading become 475 mW. Specification Values: 450 to 500 mW Adjustment Location: MICRO COMPUTER board (See page

13、8) SECTION 4 ELECTRICAL ADJUSTMENTS + frequency counter 50 RF board coaxial cable TP (ANT2) TP (GND) RF board coaxial cable TP (ANT2) TP (GND) power meter (impedance: 50 ) + Tone Modulation and Modulation Sensitivity Adjustments Setting: Procedure: Tone Modulation Adjustment 1.Turn the power ON. 2.P

14、ress the MODE button (S105) to set the GROUP talk mode. 3.Press the +/ button to set GROUP1. 4.Turn the PTT switch ON to set transmit state in no modulate condition. (AF oscillator: OFF) 5.Adjust RV104 on the MICRO COMPUTER board so that the modulation meter reading become 0.3 kHz deviation. Specifi

15、cation Values: 0.27 to 0.33 kHz deviation Modulation Sensitivity Adjustment 6.Turn the AF oscillator and PTT switch ON to apply 1 kHz/0 dBm signal. 7.Adjust RV103 on the MICRO COMPUTER board so that the modulation meter reading become 2.4 kHz deviation. Specification Values: 2.3 to 2.5 kHz deviation

16、 8.Turn the AF oscillator OFF. 9.Repeat step 5 to 8 several times. 10. Set the AF oscillator level to 33 dBm, and confirm that the modulation meter reading is 1.75 kHz deviation. Specification Values: 1.6 to 1.9 kHz deviation Note: Any channel is available. Set the L. P. F, H. P. F and etc. on the m

17、odulation meter OFF. Adjustment Location: MICRO COMPUTER board (See page 8) 10 F 1000 pF level meter + AF oscillator resistor network PTT switch + 1.6 k 600 coaxial cable RF board TP (GND) MIC jack (J102) RF board TP (ANT2) Set modulation meter (impedance: 50 ) + + + oscilloscope ON:Transmit OFF: Re

18、ceive RadioFans.CN 8 Squelch Adjustment Setting: Carrier frequency: 467.5625 MHz (8ch) Procedure: 1.Turn the power ON, and set to 8ch. 2.Press the MODE button (S105) on the MICRO COMPUTER board to set the basic mode. (Goes off “GROUP” and “SEARCH” indication) 3.Set to the modulation is 1.5 kHz and s

19、et to the modulation frequency is 1 kHz of the FM RF SSG. 4.Set to the output level is 15 dBV of the FM RF SSG, and turn the RV102 on the MICRO COMPUTER board in the clockwise to open the squelch. (Recognized by sound) 5.Turn the RV102 on the MICRO COMPUTER board in the counterclockwise until the sq

20、uelch closes. (Recognized by sound stopped) 6.Set to the output level is 12 dBV of the FM RF SSG, and confirm that the squelch opens. 7.Set to the output level is 15 dBV of the FM RF SSG, and confirm that the squelch closes. Adjustment Location: MICRO COMPUTER board RF board FM RF SSG TP (ANT2) TP (

21、GND) Adjustment Location: RF BOARD (Side A) J102 RV102 Squelch Adjustment RV107 TX Power Adjustment RV104 Tone Modulation Adjustment RV103 Modulation Sensitivity Adjustment MICRO COMPUTER BOARD (Side A) TP (GND)TP (ANT2) C53 PLL Reference Frequency Adjustment RadioFans.CN ICB-U655 9 10 11 5-1.BLOCK

22、DIAGRAM SECTION 5 DIAGRAMS 1st MIX, 1st IF AMP IC1 05 SIGNAL PATH : RF (RX) : RF (TX) : AF (RX) : AF (TX) BATT B+ 7 6 5 1 3 2 CPU B+ SYSTEM CONTROLLER (IC101) B+ POWER AMP (IC102) B+ PLL B+ CTCSS ENCODER/ DECODER (IC109) B+ TX SYSTEM B+ TX SYSTEM B+ AUDIO CIRCUIT B+ RX SYSTEM B+ AUDIO CIRCUIT B+ BAT

23、T B+ Q120 LED DRIVE D106 (LCD BACK LIGHT) D104 2.9V B+ (2.9V) CPU B+ LCD1 LCD17LCD18, LCD19 SP101 (SPEAKER) PLL B+ X103 1MHz D102 RX AUDIO OUT TX AUDIO IN TONE DECODE OUT RX AUDIO IN TX AUDIO OUT TONE IN TX TONE OUT RV104 RF IN LO IN IF OUT LOW PASS FILTER SWITCH D1 3 RF AMP Q1 TX POWER AMP Q6 RF AM

24、P Q4, 5 BUFFER Q3 VCO BUFFER Q901 LIQUID CRYSTAL DISPLAY LCD101 BUFFER IC106 (1/2) AF AMP IC106 (2/2) TX MUTE SWITCH Q117 VOLTAGE DETECT IC105 COMPARATOR IC103 (2/2) COMPARATOR IC103 (1/2) BATTERY CHECK Q114 +3V REGULATOR IC110 +2.9V REGULATOR IC111 +2.9V REGULATOR IC107 B+ SWITCH Q113 B+ SWITCH Q12

25、1 B+ SWITCH Q122 B+ SWITCH Q123 125 B+ SWITCH Q126 RESET SIGNAL GENERATOR IC104 B+ SWITCH Q119 MIC AMP Q118 MUTING CONTROL SWITCH Q112 MUTING Q108, 110 AF POWER AMP IC102 WAVE SHAPER Q102, 103 TONE DETECT AMP Q101 TONE OUT DETECT SWITCH Q115, 116 L.P.F. RIPPLE FILTER Q7 B.P.F. BPF1 2nd IF AMP Q2 RV1

26、02 SQUELCH RV104 TONE MODULATION RV103 MODULATION SENSITIVITY RV107 TX POWER 1st MIX LOCAL OSC 1st IF AMP ANT1 (ANTENNA) 462.5625MHz to 467.7125MHz 462MHz to 468MHz XF1 21.7MHz LED V2-DET SEGMENT COMMON X1 X2 XT1 XT2 POWER TONE DET D3/SERIAL DATA D2/SERIAL CLK DECODE COM IN QUAD 67 V1-IN 66 V1-OUT 3

27、7 RESET 68 AF POWER 34 TX/RX 32 POWER SAVE 31 MAIN +B 53 CARIA 63 29 38 64 P10 42 PTT 39 1kHz OUT 52 TX MUTE 36 MUTE 35 BEEP 51 7 XTAL/CLK 2 XTAL 3 X101 4.194304MHz 5859 X102 32.768kHz 5556 8413 15 14 19 22 23 20 24 16 10 1 3113 6 2nd MIX, 3rd IF AMP, DET IC2 CTCSS ENCODER/DECODER IC109 SYSTEM CONTR

28、OLLER IC101 MIX IN OSC IN N-DET MIX OUT IF IN2nd MIX LOCAL OSC 3rd IF AMP L.P.F. AUDIO FILTER TONE IN/ DECODE FILTER TONE DECODE LOGIC TONE OUT FILTER CLOCK GENERATOR DIGITAL INTERFACE FILTER/ NOISE AMP NOISE DET QUADRATURE DET 163 AF OUT 9 FIL IN 8 5 CF1 450kHz CF2 450kHz RX TONE DET OUT LOAD/LATCH

29、 PLL FREQUENCY SYNTHESIZER IC3 XIN DO LD FIN LE 11 CLK 9 DATA LE LD SQL STRB CLOCK DATA 10 60434561 62 13 2 XOUT 1 5 14 8 CHARGE PUMP LOCK DET PHASE COMPARATOR OSC CIRCUIT PROGRAMMABLE DIVIDER/COUNTER SHIFT REGISTER & LATCH C53 PLL REFERENCE FREQUENCY X1 21.25MHz D901 RV106 VOL MIC101 MIC S107 TALK

30、S101 POWER S102 (CH/GROUP) J102 MIC J101 SP + PRESCALER 76 80, 1 1221, 22 LBL 44 S103 LIGHT/BATT H CH (+) 46 S104 + CH () 50 S106 T/C 40 MODE 47 S105 MODE CH GROUP DRY BATTERY SIZE “AA” (IEC DESIGNATION R6) 3PCS. 4.5V J103 DC IN 4.5V + + RadioFans.CN RadioFans.CN ICB-U655 15 16 17 18 5-3.SCHEMATIC D

31、IAGRAM See page 19 for Waveforms. See page 20 for IC Block Diagrams. RadioFans.CN 19 20 21 22 Waveforms RF Board 1 IC2 1 (OSC IN) (TX mode) 500 mV/DIV, 20 ns/DIV 2 IC3 1 (OSC IN) (TX mode) 500 mV/DIV, 20 ns/DIV 4 IC101 % (XT1) (RX/TX mode) 1 V/DIV, 10 s/DIV 5 IC101 % (X1) (RX/TX mode) 1 V/DIV, 100 n

32、s/DIV MICRO COMPUTER Board 3 IC109 2 (XTAL) (TX mode) 1 V/DIV, 500 ns/DIV 940 mVp-p 47.1 ns 1.6 Vp-p 47.1 ns 2.7 Vp-p 1 s 2.5 Vp-p 30.5 s 2.3 Vp-p 238 ns IC Block Diagrams RF Board IC1PC2757T-E3 IF OUT VCC POWER SAVE RF IN GND LO IN 6 5 4 1 2 3 IC3MB15E03LPFV1-G-BND-ER LOCAL OSCILLATION RSSI QUADRAT

33、URE DETECTION 12345678 910161514131211 NOISE AMP FILTER AMP IF AMP BUFFER MIXER DETECTOR NOISE COMPARATOR MIX IN GND N-REC N-DET RSSI IF OUT QUAD AF OUT OSC IN OSC OUT MIX OUT VCC IF IN DEC FIL OUT FIL IN L.P.F fr fp VP VCC DO R P SUPER CHARGER CONTROL 1 BIT POWER SAVE CIRCUIT PHASE COMPARATOR DIGIT

34、AL LOCK DETECT CIRCUIT SELECT CIRCUIT PRESCALER 64/65 128/129 CRYSTAL OSCILLATOR CIRCUIT 5 OSC OUT2 4 3 OSC IN1 XFIN7 GND6 FIN8 16 15 LD/FOUT14 LE11 DATA10 CLOCK9 PS12 ZC13 14 BIT LATCH BINARY 14 BIT REFERENCE COUNTER 3 BIT LATCH SW FCLDS 11 BIT LATCH7 BIT LATCH BINARY 7 BIT SWALLOW COUNTER BINARY 1

35、1 BIT PROGRAMMABLE COUNTER 19 BIT SHIFT REGISTER CNT IC2TA31136FN MICRO COMPUTER Board IC102NJM2070M NC +IN IN GND NC VCC OUTPUT POWER GND 2 3 4 1 6 5 7 8 BIAS + IC109MX165CDW-TR CLK/XTAL CLK/XTAL CLK CLK TONE IN VREF D0 D10 A0 A5 VDD XTAL/CLK XTAL D5/SERIAL EN 1 D4/SERIAL EN 2 D3/SERIAL DATA D1/DAT

36、A IN 1 D0/DATA IN 0 D2/SERIAL CLK VSS DECODE COMPARATOR REF. DIGITAL INTERFACE & CLOCK GENERATOR TONE ROM TONE DECODE FILTER TONE IN PULSE AUDIO FILTER TONE OUT FILTER TONE DECODE LOGIC 24 RX AUDIO IN23 TX AUDIO IN22 BIAS21 TX AUDIO OUT20 RX AUDIO OUT19 PTL18 TX TONE OUT16 RX TONE OUT15 17 1 2 4 5 6

37、 7 8 9 10 11 12 3 + + LOAD/LATCH RX/TX 13RX TONE DET OUT 14 DECODE COMPARATOR IN MICRO COMPUTER BOARD IC101 PD753012AGC-F00-3B9 (SYSTEM CONTROLLER) Pin No.Pin NameI/ODescription 1 to 12LCD6 to LCD17OSegment drive signal output to the liquid crystal display (LCD101) 13STRBOSerial data latch pulse out

38、put to the CTCSS encoder/decoder (IC109) 14 to 20Not used (open) 21, 22LCD18, LCD19OCommon drive signal output to the liquid crystal display (LCD101) 23, 24Not used (open) 25BIASOLiquid crystal display drive bias control output terminal 26 to 28VLC0 to VLC2Terminal for doubler circuit capacitor conn

39、ection to develop liquid crystal display drive voltage 29LEDOLED drive signal output for the LCD back light on/off control “L”: LED on 30Not used (open) 31POWER SAVEO Power save control signal output terminal “L”: power on, “H”: power off (when receive, squelch on mode) 32TX/RXO Power supply control

40、 signal output for the transmit/receive selection “L”: receive, “H”: transmit 33VSSGround terminal 34AF POWEROPower supply on/off control signal output of the power amplifier (IC102) “L”: power on 35MUTEOMuting on/off control signal output for the receiver system “L”: muting on 36TX MUTEOMuting on/o

41、ff control signal output for the transmit system “H”: muting on 37V1-OUTOControl signal output for the battery detection circuit 38POWERIPOWER switch (S101) input terminal “L” is input when key pushing 39PTTITransmit detection signal input terminal 40T/CICH/GROUP switch (S102) input terminal “L”: CH

42、, “H”: GROUP 41Not used (open) 42P10ITone detection signal input terminal 43LDISynthesizer unlock detection signal input from the PLL frequency synthesizer (IC3) 44LBLI LIGHT/BATT H switch (S103) input terminal “H” is input when key pushing 45SQLISquelch detection signal input from the TA31136FN (IC

43、2) AF signal mute when “L” input 46CH (+)ICH (+) switch (S104) input terminal “L” is input when key pushing 47MODEIMODE switch (S105) input terminal “L” is input when key pushing 48MONITORINot used (open) 49Not used (open) 50CH ()ICH () switch (S106) input terminal “L” is input when key pushing 51BE

44、EPOBeep sound signal output to the power amplifier (IC102) 521kHz OUTO1 kHz signal output for the search mode 53MAIN +BO Main system power supply (+2.9V) on/off control signal output terminal “L”: power off, “H”: power on 54VDDPower supply terminal (+3V) 55XT1ISub system clock input terminal (32.768

45、 kHz) 56XT2OSub system clock output terminal (32.768 kHz) 57ICInternal connection terminal (connected to power supply (+3V) 58X1IMain system clock input terminal (4.194304 MHz) 59X2OMain system clock output terminal (4.194304 MHz) 60LEOSerial data latch pulse output to the PLL frequency synthesizer

46、(IC3) 61DATAOSerial data output to the CTCSS encoder/decoder (IC109) and PLL frequency synthesizer (IC3) 62CLOCKO Serial data transfer clock signal output to the CTCSS encoder/decoder (IC109) and PLL frequency synthesizer (IC3) 63CARIAOTransmit system power supply on/off control signal output terminal “H” active 5-4.IC PIN FUNCTION DESCRIPTION RadioFans.CN 23 Pin No.Pin NameI/ODescription 64TONE DETITone detection signal input from the CTCSS encoder/decoder (IC109) 65TESTINot used (open) 66V1-INIBattery detection signal input terminal 67V2-DETIVoltage detection signal i