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1、MICROFILM SERVICE MANUAL FM STEREO/FM-AM TIMER TUNER AEP Model UK Model ST-EX880 E Model Tourist Model ST-MS717 SPECIFICATIONS ST-EX880/MS717 ST-EX880/MS717 are the tuner section in DHC-EX880MD/MD717. Photo: ST-MS717 RadioFans.CN 收音机爱 好者资料库 2 TABLE OF CONTENTS 1.SERVICING NOTES. 2 2.GENERAL. 3 3.DIS
2、ASSEMBLY. 5 4.ELECTRICAL ADJUSTMENTS. 6 5.DIAGRAMS 5-1.Note for Printed Wiring Boards and Scehmatic Diagrams . 7 5-2.Printed Wiring Board MAIN Section (ST-EX880) . 9 5-3.Printed Wiring Board MAIN Section (ST-MS717). 11 5-4.Schematic Diagram MAIN Section (1/2) .13 5-5.Schematic Diagram MAIN Section (
3、2/2) . 15 5-6.Printed Wiring Board PANEL Section . 17 5-7.Schematic Diagram PANEL Section . 19 5-8.Schematic Diagram RDS Section (ST-EX880). 21 5-9.Printed Wiring Board RDS Section (ST-EX880) . 21 5-10. Schematic Diagram POWER Section . 22 5-11. Printed Wiring Boards POWER Section . 23 5-12. IC Pin
4、Function Description . 25 6.EXPLODED VIEWS. 29 7.ELECTRICAL PARTS LIST. 31 SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART
5、NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY. SECTION 1 SERVICING NOTES KEYs FLUORESCENT INDICATOR TUBE/LEDs CHECK MODE (Work a separately) 1.Press POWER button. 2.Press two buttons POWER and SLEEP simultaneously. 3.LEDs are all turned on, the fluorescent indicator tu
6、be displays “KEY/FL/LED”, and the check mode is set. 1 All LED indicators light on mode 2 All Fluorescent indicator tube light on mode 3 ST segment mode 4 RDS segment mode 5 Encoder and key check mode Note: 1)All LED light on mode is kept, when buttons which is pressed to enter all LED light on mode
7、, release same time. When release them separate timing, it is moved to next All Fluores- cent indicator tube light on mode. 2)After all LED light on mode, light on point remove one by one, when any button pressed or MULTICONTROLLER knob turned. 3)Under KEY check mode, every time buttons pressed nume
8、rical value of “KEY=” in FL tube increase. And that time, numerical value of “ECDR=” increase when MULTICONTROLLER button turn to + direction, and it decrease turn to direction. To exit from this mode, disconnect the power cord. TUNER CHECK MODE (Work a separately) 1.Press POWER button. 2.Press two
9、buttons POWER and ENTER/YES simultaneously, and the tuner check mode is set. 3.System power on, set up the tuner function, and test condition inactive. Press two buttons POWER and ENTER/YES simultaneously to exit, and system power off. COLD RESET (Work a complex) The cold reset clears each unit micr
10、ocomputer memory to initial conditions. 1.Press POWER button to turn the set OFF. 2.Press three buttons MENU/NO, PRESET, and POWER simultaneously. 3.A message “COLD SET OK” is displayed on the fluorescent indicator tube two seconds. 4.Press POWER button to turn the set OFF. 5.Remove power cord after
11、 the clock is displayed on the fluo- rescent indicator tube. 6.Connect power cord, press POWER button to turn the set ON, and the set is reset. 4-995-091-1: Hong Kong, Singapore, Malaysia 4-995-091-2: AEP, UK 4-995-091-3: Tourist MODEL IDENTIFICATION Back Panel RadioFans.CN 收音机爱 好者资料库 3 SECTION 2 GE
12、NERAL This section is extracted from instruction manual. LOCATION OF CONTROLS Front Panel Rear Panel 1 I/u (POWER) button 2 REMOTE CONTROL receiver 3 ONCE, DAILY, REC, SLEEP indicator 4 REC button 5 DAILY button 6 ONCE button 7 CLOCK/TIMER SET button 8 STEREO/MONO button 9 SLEEP button ! MULTI CONTR
13、OLLER knob ! ENTER/YES button ! MENU/NO button ! BAND button ! RESET button ! Fluorescent indicator tube ! AUTO/n button ! MANUAL/N button ! DISPLAY button ! TUNER OUT terminal FM/AM ANTENNA terminal AU BUS terminal SYSTEM CONTROL terminal AC OUTLET (for TA-MS717) POWER cord RadioFans.CN 收音机爱 好者资料库
14、4 5 MAIN BOARD Note: Follow the disassembly procedure in the numerical order given. SECTION 3 DISASSEMBLY 3case 0three screws (BVTP3 10) 1two screws (case3 TP2) 4flat type wire (19 core) (CN102) !claw 7two claws 6two screws (BVTT3 6) 7claw 8front panel assy 5connector (CN104) !claw !MAIN board 9two
15、screws (BVTP3 8) 1two screws (case3 TP2) 2screw (BVTT3 6) 6 0 dB=1 V Note: As a front-end (FE1) is difficult to repair if faulty, replace it with new one. AM Section Adjustment Setting: AM Tuned Level Adjustment Band: AM or MW Procedure: 1.Set the output of SSG so that the input level of the set be-
16、 comes 55 dB/m. 2.Tune the set to 999 kHz or 1,000 kHz. 3.Adjust RV1 to the point (moment) when the TUNED indica- tor will change from going off to going on. Adjustment Location : MAIN board FM Section Adjustment Note: This adjustment should be performed after the AM Tuned Level Adjustment due to th
17、e same adjustment element. Setting: FM Tuned Level Adjustment Band: FM Procedure: 1.Supply a 26 dB 98 MHz signal from the ANTENNA termi- nal. 2.Tune the set to 98 MHz. 3.If the TUNED indicator does not light, adjust RV2 to the point (moment) when the TUNED indicator will change from going off to goi
18、ng on. Adjustment Location: MAIN board SECTION 4 ELECTRICAL ADJUSTMENTS AM RF SSG loop antenna set loop antenna (Supplied accessories) 60 cm AM ANTENNA terminal 30% amplitude modulation by 400 Hz signal Carrier frequency: 999 kHz (at 9 k step) 1,000 kHz (at 10 k step) Output level: 25 dBField streng
19、th dB (V/m) =SSG output level dB (V/m) 26 dB. Carrier frequency: 98 MHz Modulation: AUDIO 1 kH, 75 kHz deviation (100%) Output level: 26 dB (17.8 V) FM ANTENNA terminal (75 open) 75 coaxial set FM RF stereo signal generator RV1 IC1 FE1 RV2 Adjustment Location: MAIN BOARD (Component Side) ST-EX880/MS
20、717 7 8 SECTION 5 DIAGRAMS 5-1.NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specif
21、ied. : internal component. 2 : nonflammable resistor. C : panel designation. Note on Printed Wiring Boards: X : parts extracted from the component side. : internal component. Indication of transistor. Abbreviation: HK: Hong Kong JE: Tourist MY: Malaysia SP: Singapore U : B+ Line. V : B Line. H : adj
22、ustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM () : AM (MW) : STAND BY : MUTING ON Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal produc- tion tolerances. Waveforms are t
23、aken with a oscilloscope. Voltage variations may be noted due to normal produc- tion tolerances. Circled numbers refer to waveforms. Signal path. F: FM f: AM (MW) Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. B
24、These are omitted. CE Q Circuit Boards Location Waveforms MAIN Section 1 IC51 1 (XIN) 2 IC201 $ (X2) 3 IC201 $ (XT2) 2.9Vp-p 4.5 MHz PANEL Section 4 IC901 (XOUT) 5 IC901 (XIN) 4.4Vp-p 10 MHz 4.8Vp-p 32.768 kHz 5.2Vp-p 513 kHz 880 mVp-p 504 kHz AC OUTLET board (Tourist model) TRANSFORMER board PANEL
25、board RDS board (ST-EX880) MAIN board ST-EX880/MS717 D1F-1 D2E-2 D103G-7 D104E-7 D105E-6 D125B-5 D143D-6 D161D-7 D191D-2 D272G-8 D281H-4 D282G-4 IC1E-4 IC51C-2 IC111C-7 IC171I-6 IC201G-6 Q1C-4 Q2C-4 Q9C-4 Q10C-5 Q11A-3 Q12A-4 Q13A-4 Q14B-4 Q15B-4 Q55E-2 Q121B-5 Q122B-5 Q123C-5 Q141D-6 Q142D-6 Q201F-
26、6 Q202B-6 Q203B-7 Q273G-8 Q274G-8 Q281H-4 9 10 5-2.PRINTED WIRING BOARD MAIN Section (ST-EX880) See page 7 for Circuit Boards Location. Semiconductor Location Ref. No.Location (Page 21) (Page 20) (Page 24) ST-EX880/MS717 11 12 5-3.PRINTED WIRING BOARD MAIN Section (ST-MS717) See page 7 for Circuit B
27、oards Location. D1F-1 D2E-2 D103G-7 D104E-7 D105E-6 D125B-5 D143D-6 D161D-7 D191D-2 D272G-8 D281H-4 D282G-4 IC1E-4 IC51C-2 IC111C-7 IC171I-6 IC201G-6 Q1C-4 Q2C-4 Q9C-4 Q10C-5 Q55E-2 Q121B-5 Q122B-5 Q123C-5 Q141D-6 Q142D-6 Q201F-6 Q202B-6 Q203B-7 Q273G-8 Q274G-8 Q281H-4 Semiconductor Location Ref. No
28、.Location (Page 24) (Page 20) ST-EX880/MS717 13 14 5-4.SCHEMATIC DIAGRAM MAIN Section (1/2) See page 8 for Waveforms. The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. (Page 15) ST-EX880/MS717 15 16 5-5.SCHEMATIC DIAGRAM
29、MAIN Section (2/2) See page 8 for Waveforms. (Page 21) (Page 20) (Page 14) (Page 22) ST-EX880/MS717 17 18 5-6.PRINTED WIRING BOARD PANEL Section See page 7 for Circuit Boards Location. (Page 10, 12) ST-EX880/MS717 19 20 5-7.SCHEMATIC DIAGRAM PANEL Section See page 8 for Waveforms. (Page 16) ST-EX880
30、/MS717 21 22 5-8.SCHEMATIC DIAGRAM RDS Section (ST-EX880) 5-9.PRINTED WIRING BOARD RDS Section (ST-EX880) See page 7 for Circuit Boards Location. 5-10.SCHEMATIC DIAGRAM POWER Section The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number
31、 specified. (Page 15) (Page 9) (Page 15) ST-EX880/MS717 23 24 5-11.PRINTED WIRING BOARDS POWER Section See page 7 for Circuit Boards Location. (Page 10, 12) ST-EX880/MS717 25 26 5-12.IC PIN FUNCTION DESCRIPTION MAIN BOARD IC201 PD78016FGC-544-AB8 (SYSTEM CONTROLLER) Pin No.Pin NameI/OFunction 1 to 4
32、 DATA 0 to DATA 3 I/OTwo-way data bus with the system control bus 5IF+50IFixed at “L” in this set 6IF50OFixed at “L” in this set 7, 8GNDGround terminal 9VSSGround terminal 10POWERO Power on/off control signal output for the +10V and +5V power supply “L”: power on, “H”: standby 11MUTEOTuner muting on
33、/off control signal output terminal “L”: muting on 12AC RELAYORelay drive signal output for the AC on/off control “L”: standby, “H”: power on 13, 14NCONot used (open) 15AM MONOOAM forced monaural control signal output terminal “H”: forced monaural Not used (open) 16AM/FMOFM/AM selection signal outpu
34、t terminal Not used (open) 17IFNGO Intermediate frequency count effect signal output terminal “L”: NG, “H”: OK Not used (open) 18STEREOIStereo detection signal input from the LA1835 (IC1) “L”: stereo 19SIGNALIFM/AM frequency detection signal input from the LA1835 (IC1) “L”: tuned, “H”: detuned 20DAT
35、A INIPLL serial data input from the FM/AM PLL (IC51) 21DATA OUTOPLL serial data output to the FM/AM PLL (IC51) 22CLOCKOPLL serial data transfer clock signal output to the FM/AM PLL (IC51) 23CEOPLL serial chip enable signal output to the FM/AM PLL (IC51) 24VSSGround terminal 25SIRCS INISircs remote c
36、ontrol signal input from the remote control receiver (IC902) 26STAND BYOLED drive signal output for the STANDBY indicator Not used (open) 27ONCEOLED drive signal output for the ONCE indicator (D905) “L”: LED on 28DAILYOLED drive signal output for the DAILY indicator (D904) “L”: LED on 29RECOLED driv
37、e signal output for the REC indicator (D903) “L”: LED on 30SLEEPOLED drive signal output for the SLEEP indicator (D902) “L”: LED on 31ENCORDER IN AIJog dial pulse (A) input from the rotary encoder (S915) (for MULTI CONTROLLER) 32ENCORDER IN BIJog dial pulse (B) input from the rotary encoder (S915) (
38、for MULTI CONTROLLER) 33AUBUS INISircs remote control signal input for the audio bus 34AUBUS OUTOSircs remote control signal output for the audio bus 35RESETI System reset signal input from the reset signal generator circuit “L”: reset For several hundreds msec. after the power supply rises, “L” is
39、input, then it changes to “H” 36RDS CLKI Serial data transfer clock signal input from the RDS decoder (IC302) Used for the ST-EX880 (ST-MS717: fixed at “L”) 37CLOCKI/OBus data transfer/reading clock signal in/out terminal for the system control bus 38BUSYI/OBusy signal in/out terminal for the system
40、 control bus 39AC OFFIAC off detection signal input terminal “L”: AC off 40VDDPower supply terminal (+5V) 41X2OMain system clock output terminal (10 MHz) 42X1IMain system clock input terminal (10 MHz) 43GND IC (VPP)Ground terminal 44XT2OSub system clock output terminal (32.768 kHz) 45XT1ISub system
41、clock input terminal (32.768 kHz) 46AVSSGround terminal (for A/D converter) Pin No.Pin NameI/OFunction 47KEY IN 1I Key input terminal (A/D input) (S907 to S913) ONCE, DAILY, REC, SLEEP, CLOCK/TIMER SET, ENTER/YES, MENU/NO keys input 48KEY IN 2I Key input terminal (A/D input) (S901 to S906) STEREO/MO
42、NO, BAND, PRESET, MANUAL, AUTO, DISPLAY keys input 49KEY IN 3I Key input terminal (A/D input) (S914) I/u (power) key input 50RDS DATAI Serial data input from the RDS decoder (IC302) Used for the ST-EX880 (ST-MS717: fixed at “L”) 51DESTINATIONI Input terminal for the destination setting (Tourist mode
43、l: fixed at “L”, Except Tourist model: open) 52DESTINATIONIInput terminal for the destination setting (fixed at “L”) 53DESTINATIONI Input terminal for the destination setting (Tourist model: open, Except Tourist model: fixed at “L”) 54DESTINATIONIInput terminal for the destination setting (ST-EX880:
44、 open, ST-MS717: fixed at “L”) 55AVDDPower supply terminal (+5V) (for A/D converter) 56AVREFIReference voltage (+5V) input terminal (for A/D converter) 57GNDGround terminal 58SDATAOSerial data output to the fluorescent indicator tube driver (IC901) 59SCKOSerial data transfer clock signal output to t
45、he fluorescent indicator tube driver (IC901) 60CSOChip select signal output to the fluorescent indicator tube driver (IC901) “L” active 61RESETOReset signal output to the fluorescent indicator tube driver (IC901) “L”: reset 62ERRORSOOutput terminal of the error monitor Not used (open) 63CORRECTIONOO
46、utput terminal of the correction monitor Not used (open) 64RECEIVEDOOutput terminal of the receive monitor Not used (open) 27 IC Block Diagrams MAIN Board IC1LA1835 IC51LC72130 ALC BUFF AM OSC AM MIX AM RF. AMP AGC S METER LEVEL DET FM IF AM DET S-CURVE AM/FM IF BUFF REG TUNING DRIVE COMP GND AM/FM SW VCC PHASE DET PILOT DET VCO FF STEREO DRIVE TRIG STEREO SW MUTE FFFF FM IF FM DET DECODER ANTI BIRDIE 12345678910 2019181716 1514131211 21222324252627282930 FM-SD AM-OSC FM-AFC
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