Sony_ICF-SW7600GR 电路图 维修原理图.pdf
ICF-SW7600GR US Model Canadian Model AEP Model Chinese Model E Model Tourist Model SERVICE MANUAL FM STEREO/SW/MW/LW PLL SYNTHESIZED RECEIVER SPECIFICATIONS Ver 1.1 2001. 08 9-873-099-12 2001H1600-1 2001.8 Sony Corporation Personal Audio Company Shinagawa Tec Service Manual Production Group Circuit systemFM:Super heterodyne AM: Dual conversion super heterodyne Frequency rangeFM:76108 MHz 87.50 108 MHz (Saudi Arabia and Malaysia) SW:1 621 29 999 kHz 2 25026 100 kHz (Saudi Arabia and Malaysia) MW: 5301 620 kHz LW: 150529 kHz 150285 kHz (Saudi Arabia and Malaysia) OutputLINE OUT jack (stereo minijack) 1 Recording output level approx. 245 mV, output impedance less than 10 k i (headphones) jack (stereo minijack) 1 16 SpeakerApprox. 77 mm diameter, 8 1 Maximum output380 mW (at 10 % harmonic distortion) Power requirementsDC 6 V, four R6 (size AA) batteries External power source (Except Chinese) DC IN 6V DimensionsApprox. 190 118.8 35.3 mm incl. projecting parts (w/h/d) MassApprox. 536 g Approx. 608 g (incl. four R6 (size AA) batteries) Supplied accessories Carrying case (1) Batteries (4) (Tourist) Stereo headphones (1) (Tourist) Ear pads (2) (Tourist) AC power adaptor (1) (Tourist) AC plug adaptor (1) (Tourist) Compact antenna AN-71 (1) Antenna connector (1) (Tourist) Wave Handbook (1) (Except Saudi Arabia and Malaysia) Short Wave Guide (1) (Saudi Arabia and Malaysia) Design and specifications are subject to change without notice. 2 TABLE OF CONTENTS ICF-SW7600GR 1. GENERAL3 2. DISASSEMBLY 2-1. Cabinet (Rear) 6 3. ELECTRICAL ADJUSTMENTS 6 4. DIAGRAMS 4-1. Block Diagram 9 4-2. Printed Wiring Board Main Board (Conductor Side) 10 4-3. Printed Wiring Board Main Board (Component Side) 11 4-4. Schematic Diagram Main Board (1/2) 12 4-5. Schematic Diagram Main Board (2/2) 13 4-6. Printed Wiring Board KEY Board 14 4-7. Schematic Diagram KEY Board 15 4-8. IC Pin Function Description 16 5.EXPLODED VIEWS 5-1. Cabinet Section 17 5-2. Chassis Section 18 6. ELECTRICAL PARTS LIST 19 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT! LES COMPOSANTS IDENTIFS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PISES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPMENTS PUBLIS PAR SONY. 3 ICF-SW7600GR SECTION 1 GENERALThis section is extracted from instruction manual. 1 AM EXT ANT (AM external antenna) jack (35) 2 ATT (attenuator) control (21) 3 ATT (attenuator) ON/ OFF switch (21) 4 LINE OUT (recording output) jack (33) 5 2 (headphones) jack (17, 33) You can enjoy FM stereo broadcasting by connecting the optional stereo headphones to the unit . When using headphones, sound from the speaker will be muted. 6 DC IN 6V ! (external power input) jack (10) 7 LIGHT button When the display is difficult to see, press this button to light up the display for approximately 10 seconds. Pressing the button again while the light is on will turn off the light. Performing button operations while the light is on will extend the lighting time. 8 Display (7) 9 Controls (6) 0 Speaker FrontRear qa SSB FINE TUNE control (26) qs LSB/USB selector (26, 27) qd AM MODE selector (26, 27) qf TONE selector (33) qg VOLUME control qh Telescopic antenna Always pull out the base of the antenna before use. Furthermore, do not use unnecessary force when storing the antenna. At this time, be sure to push in the base as well. qj Stand qk Battery compartment Base Pull out 4 ICF-SW7600GR Controls 1 SLEEP button (31) 2 HOLD switch (32) 3 DIRECT button (15, 16) 4 FM/AM button (16, 18, 20) 5 STANDBY MEMORY, TIMER STANDBY/ STANDBY TIME SET buttons (28, 30) 6 ENTER, LOCAL TIME SET button (11, 22, 28) 7 ERASE, DST (Daylight Saving Time) button (11, 13, 30) 8 AM BAND, WORLD TIME button (13, 18, 20) 9 POWER ON/OFF button 0 Number buttons (15, 16, 22, 23, 24) qa DISPLAY, EXE button (13, 15, 16) Press to switch to clock display while operating the radio. Press again to return to the previous display. If you do not press the button, the display will return to the previous condition in about 10 seconds. qs SCAN button (24) qd PAGE button (22, 24) qf MANUAL TUNE/SCAN START/STOP, STANDBY TIME SET/TIME SET buttons (11, 13, 18, 20, 28) Display 1 TUNE indicator (16, 18) Appears when a station is tuned in. 2 Battery indicator (9) 3 HOLD indicator (32) Appears when HOLD is in effect. All buttons will be inoperative. 4 (Daylight Saving Time) indicator (12) Appears when the time display is adjusted to the Daylight Saving Time. 5 Preset number/time difference display (11, 22, 23) 6 SYNCLOCK (synchronous detection lock) indicator (27) Appears when synchronous detection is in effect. 7 SLEEP indicator (31) Appears when the sleep timer is in effect. 8 STANDBY, STANDBY indicators (28, 29, 30) Light up when the standby timer is set. 9 PAGE number display Appears constantly when the radio is on. 0 Time/frequency display 5 ICF-SW7600GR Setting the Current Time “0:00” flashes in the display when installing the batteries for the first time or when the unit has been reset. Set the clock to the current time. This unit can display local time, which is the time for your time zone, as well as world time, which is the time for any other area in the world. For the calculation of the time in other areas of the world, the time difference* between the local time and the UTC (Universal Time Coordinated) is used (see page 14, “Time difference with UTC for each area”). To find out the correct time, set the correct time and time difference of the area you are in. * This unit uses time zones to pinpoint specific areas. 1If the radio is turned on, press POWER ON/OFF to turn it off. Note You cannot set the clock when the radio is turned on. 2Hold down LOCAL TIME SET and press K or +k to choose the time difference between your local time and the UTC. TIME ZONE indicator will appear. Each time you press K or +k, the time difference (UTC + or ) and the “hour” of the clock will increase or decrease accordingly. Two short beeps will be heard when adjusting the time difference to 0. When you release LOCAL TIME SET, the TIME ZONE indicator will disappear and the time difference with UTC will be determined. 1 2 4 3 2, 4, 5 3To set the daylight saving time, press DST to display the indicator. If daylight saving time is not used in your area, daylight saving time is not currently in effect, or is already displayed, proceed to Step 4. 4Hold down LOCAL TIME SET and press ?K or k?+ to set the local time. Each time you press ?K or k?+, the current time will decrease or increase by a minute. To change the digits rapidly, hold down ?K or k?+. Two short beeps will be heard when adjusting the time to “0:00”. 5Release LOCAL TIME SET. “ : ” starts flashing and the clock starts running. To switch to clock display while the radio is turned on Press EXE. The display returns to the previous condition automatically after about 10 seconds or when EXE is pressed again. The time display period is extended when the WORLD TIME button is pressed during clock display, or when K or +k is pressed during world time display. During clock display, radio operations such as changing frequencies are not possible. The clock will not be displayed during auto scan (page 20) or memory scan (page 24). For areas adopting the daylight saving time (summer time) Press DST to display the indicator if you are now in the summer time period. When the summer time period has ended, press DST to clear the indicator. The time display will be adjusted automatically. Tips The clock is displayed in the 24 hour system. Press LOCAL TIME SET to stop the flashing of “0:00”. To adjust the time to the second, release LOCAL TIME SET at the time of the tone. 6 ICF-SW7600GR SECTION 2 DISASSEMBLY Note :Follow the disassembly procedure in the numerical order given. 2-1.CABINET (REAR) SECTION 3 ELECTRICAL ADJUSTMENTS Put the lead-wire antenna close to the set. AM RF signal generator 30% amplitude modulation by 400Hz signal output level: as low as possible i headphones jack (J202) level meter set 16 AM Section FM Section (1) AM / FM VCO Check and Adjustment Setting: ATT switch: OFF TONE switch: MUSIC AM MODE switch : NORM Procedure: 1.Connect digital voltmeter to the TP VT. 2.Tune the set to AM 150kHz. 3.Confirm that the reading on the digital voltmeter becomes in more than 2.2V. 4.Tune the set to AM 29999kHz. 5.Confirm that the reading on the digital voltmeter becomes in less than 13V. 6.Tune the set to FM 108.00MHz. 7.Confirm that the reading on the digital voltmeter becomes in less than 13V. 8.IF the value is more than 13V, adjust T202 so that the reading on the digital voltmeter becomes in 12.5V. Adjustment Location: MAIN board (See page 8) (2) 1st IF Adjustment Setting : ATT switch: OFF TONE switch: MUSIC AM MODE switch : NORM Procedure: 1.Set the frequencies of the AM RF signal generator and the frequency display of the set to AM 150kHz. 2.Adjust T104 and T105 so that the reading on level meter becomes in maximum. Adjustment Location: MAIN board (See page 8) FM RF signal generator FM RF IN 22.5kHz frequency deviation by 400Hz signal output level: as low as possible set 1 Three screws (+BTP 3 25) 2 Two screws (+BTP 3 25) 4 Cabinet (rear) 3 Four claws 7 ICF-SW7600GR NG Center NG NG OK (3) 2nd Local Adjustment Setting: ATT switch: OFF TONE switch: MUSIC AM MODE switch : NORM Procedure: 1.Connect frequency counter to the TP OSC2 through the high input impedance amplifier. 2.Tune the set to AM 150kHz. 3.Adjust CT202 so that the reading on the frequency counter becomes in 53.39000MHz30Hz.(55.38997 to 55.39003MHz) Adjustment Location: MAIN board (See page 8) (4) FM Tracking Adjustment Setting: ATT switch: OFF TONE switch : MUSIC Procedure: 1.Set the frequency of the FM RF signal generator and the frequency display of the set to FM 108.00MHz. 2.Adjust CT101 and CT102 so that the reading on level meter becomes in maximum. 3.Set the frequency of the FM RF and the frequency display of the set to FM 76.00MHz. 4.Adjust T101 and T102 so that the reading on level meter becomes in maximum. 5.Repeat the above steps 1 to 4 several times. Adjustment Location: MAIN board (See page 8) (5) 76kHz (MPX) Adjustment Setting: ATT switch: OFF TONE switch : MUSIC Procedure: 1.Insert Headphones plug into headphones jack (J202) (for VCO operation). 2.Connect a capacitor (10F) between IC202 pin1 and GND. 3.Connect frequency counter to the TP 76K (VCO) through the high input impedance amplifier. 4.Tune the set to FM 108.00MHz. 5.Adjust RV203 so that the reading on the frequency counter becomes in 76kHz300Hz. 6.Remove the headphones plug. Adjustment Location: MAIN board (See page 8) (6) Just Tune Adjustment Setting : ATT switch: OFF TONE switch : MUSIC (FM RF signal generator) Frequency: 93.025MHz Moduration: 22.5kHz Output level: 54dB Procedure: 1.Connect an oscilloscope to the TP SD. 2.Tune the set to FM 93.00MHz. 3.Adjust RV202 so that the waveform on the oscilloscope satisfy as shown the figure. Adjustment Location: MAIN board (See page 8) (7) SSB 0 Beat Adjustment Setting : ATT switch: OFF TONE switch : MUSIC (AM RF signal generator) Frequency: AM 150kHz Moduration: None Output level: 44dB Procedure: 1.Connect an oscilloscope to the TP DET. 2.Tune the set to AM 150kHz. 3.Set the AM MODE switch to SYNC. 4.Set the SYNC switch to USB. 5.Adjust CT201 so that the waveform on the oscilloscope is minimized. 6.Set the LSB/USB switch to LSB. 7.Adjust CT201 so that the waveform on the oscilloscope is minimized. 8.Repeat the above steps 4 to 7 several times. 9.Set the AM MODE switch to SSB. 10. Confirm that the beat sound is changed by turning the SSB FINE TUNE control. Adjustment Location: MAIN board (See page 8) 8 ICF-SW7600GR Adjustment Location : MAIN BOARD Component Side MAIN BOARD Conductor Side T104T105 1st IF Adjustment T202 FM VCO Adjustment IC201 RV202 JUST TUNE Adjustment CT101CT102 FM TRACKING Adjustment (108MHz) T101T102 FM TRACKING Adjustment (76MHz) CT202 2nd LOCAL Adjustment CT201 SSB 0 BEAT Adjustment RV203 76kHz (MPX) Adjustment RV204 VOLUME RV203 C231 C272 C262 C1 C135 C221 C259 C209 CF205 CT201 CF204 CF203 C267 C253 C261 C260 RV202 X201 CT202 C152 CT102 T102 T202 CT101 T107 CF20115 1 18 916 16 30 1 17 18 2 CN201 IC203 IC201 T101 T103 2C2E 2C 2C 1E 1B 1B 2E E 2B 2B 1C 1C 2C 1B E 2B 1C AK KA C B E C B E C B E 1 1 45 8 5 S D G S S D D G G B B B E E E C C C B E C K K A A K A A A K K C E B A E C VT AM/FM VCO Adjustment OSC2 2nd LOCAL Adjustment SD JUST TUNE Adjustment 76K (VCO) MPX Adjustment DET SSB 0 BEAT Adjustment 99 ICF-SW7600GR SECTION 4 DIAGRAMS 4-1. BLOCK DIAGRAM 20 19 15 1613 145 119 2223 19 10 8 1 16 7 10 9 4 13 14 4 2476827 26 1 29 2 30 + 2 1 53 14 56 55 5 6 8 501 511 233 2 72 2 2 25 24 52 19 20 54 21 16 17 15 Q112,113 ATT Q105 ATT Q205 BAND SWITCH Q209 FM HIGH CUT Q210 AM HIGH CUT Q202 SWITCH Q203 MUTING Q211 MUTING Q214 LINE AMP Q213 LINE AMP Q215 MUTING Q224 B+ SWITCH Q222,225 B+ SWITCH Q202 SWITCH Q223 SWITCH Q201 SWITCH Q201 SWITCH Q208 SWITCH Q210 SWITCH Q101 MUTING CONTROL Q101 MUTING CONTROL Q120 ATT Q106 ATT Q114,115 AGC Q302 CURRENT REG Q303,306 PLL LPF Q301 LED DRIVE Q108,121 AGC Q109,110 AM MIX Q111 1ST IF AMP Q116 LW/MW RF AMP Q107 SW RF AMP Q104 FM RF AMP Q119 1ST OSC AMP Q117 AM VCO AMP Q304 FM VCO AMP Q206 FM VCO BUFFER Q207 AM/FM SWITCH Q212 STEREO CONTROL Q220 AM/FM B+ SWITCH Q219 AM/FM B+ SWITCH Q216 DC/DC CONVERTER Q221 AM/FM B+ SWITCH Q217 AM/FM B+ SWITCH Q218 AM/FM B+ SWITCH Q305 AM/FM B+ SWITCH Q118 1ST OSC VT VT VT BPF VT REG 35 49 9 3 13 10 31 34 KEY MATRIX BATT IC204 +3V REG REG REG VT ANT101 J101 AM EXT ANT (EXCEPT CH) ROD B BAR B TO Q112-116 REG S101 RV101 ATT ANT102 (FERRITE-ROD) AGC AGC (TELESCOPIC) T101 FM ANT CT101 FM TRACKINGFM TRACKING T102 FM RF CT102 MUTING VCOL VCOH AM REG AM REG T104 AM MIX2 XF101 55.845MHz T105 AM IFT1 1ST IF AM REG T202 FM VCO X201 AM OSC2 55.390MHz CT202 2ND LOCAL CT201 SSB 0 BEAT RV201 SSB FINE TUNE S201 AM MODE MUTING MUTING FMRF AMIN BAND FMOSC AMOSC-I AMOSC-O CERALOCK SYNC/SSB VCO ENV/PSN DET METER SD-OUT SD-CTRL/AGC U/L FEOUTFMIFOUTFMIFIN AMIFIN FMLIMIN DISCRI CF202 10.7MHz CF201 455kHz CF203 10.7MHz CF205 DISCRI 10.7MHz METER SD AGC RV202 JUST TUNE S202 SYNC MUTING FM REG AM REG RV203 76k(MPX) IN VCO IN2 L IN1 R NF2 NF1 VOL L R STOP IC202 PLL FM MPX IC203 PRE/POWER AMP OUT2 OUT1 VCC S203 TONE RV204 VOLUMEw J201 LINE OUT SP201 (SPEAKER) J202 (HEADPHONES) J203 BEEP MUTING IC302 DIGITAL TUNING SYSTEM CONTROL X301 75kHz S301 - 323 S325 - 328 S329 HOLD . BATT IC303 IC304 IC305 3.5V DET 3.1V DET 3.0V REG IC301 EEPROM VDD VDD SDA SCK XIN XOUT KS0-6 KR0-3 HOLD SI/SO SCK VDET CE
