Panasonic-SAEH790E-rec-sm 电路图 维修手册.pdf

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1、ORDER NO.AD0303004C2 Tuner/Amplifier SA-EH790E / SA-EH790EB / SA-EH790EG / SA-EH790EP Colour (S).Silver Type System: SC-EH790 Because of unique interconnecting cables, when a compact requires service, send or bring in the entire system. SPECIFICATIONS Specification 1 RadioFans.CN 收音机爱 好者资料库 Amplifie

2、r section Power output (L/R both channel driven) Stereo Mode DIN1 kHz THD 1%/6 (High)225 W 100 Hz THD 1%/8 (Low)245 W RMS1 kHz THD 10%/6 (High)235 W 100 Hz THD 10%/8 (Low)265 W PRO LOGIC mode DINFRONT 1 kHz THD 1%/6 (High)225 W 100 Hz THD 1%/8 (Low)245 W SURROUND 1 kHz THD 1%/8 230 W CENTER 1 kHz TH

3、D 1%/8 60 W RMSFRONT 1 kHz THD 10%/6 (High)235 W 100 Hz THD 10%/8 (Low)265 W SURROUND 1 kHz THD 10%/8 240 W CENTER 1 kHz THD 10%/8 80 W PMPO 1 kHz/High 6 , Low 8 , CENT. 8 , SURR. 8 3000 W Total harmonic distortion Rated power at 1 kHz1% (6 ) Half power at 1 kHz0.1% (6 ) Load impedance FRONT (High)6

4、 FRONT (Low)8 SURROUND8 CENTER8 DIGITAL S. WOOFER Center frequency60 Hz LEVEL (VOL -20 db)MID +3 db MAX +6 db FM tuner section Frequency range87.50108.00 MHz (0.05 MHz steps) Sensitivity 1.8 V (IHF usable) S/N 26 db 1.5 V S/N MONO70 db (75 db, IHF) Antenna terminal(s)75 (unbalanced) AM tuner section

5、 Frequency range5221629 kHz (9 kHz steps) 5201630 (10 kHz steps) Sensitivity (S/N 20 db) 500 V/m Timer section ClockQuartz-lock type FunctionPlay timer (1 time, daily), Rec timer (1 time, daily) 2 RadioFans.CN 收音机爱 好者资料库 Sleep (120 min, 30 min intervals) Setting intervals (Play/Rec)1 minute23 hours

6、59 minutes (1 min intervals) General Power supply (For (E) ,(EG),(EP)areas)AC 230V 50Hz (For (EB) area)AC 230240V 50Hz Power consumption190 W Standby0.5 W Dimensions (WHD)293118.5345 mm Mass5.2 kg Nots1.Design and specifications are subject to change without notice. 2.Dimensions and mass are approxi

7、mate. 3.Total harmonic distortion is measured by the digital spectrum analyzer. System/SC-EH790 Sound processor: SH-EH790, CD changer: SL- EH790, Tuner/ Amplifier: SA-EH790 , Cassette Deck: RS-DV290, Speakers: Front* (SB-DV290), Center* (SB-PC95),Surround* (SB-PS95)(*Made in MAES.) 2003 Matsushita E

8、lectric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law. 1. Before Repairs 1. Turn off the power supply. Using a 10 , 10 W resistor, connect both ends of power supply capacitors (C701, C703 and C702, C704) in order to discharge the voltage. 2. Be

9、fore turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage controller to make sure that the consumed current at 50 Hz in NO SIGNAL mode should be shown below with respecttosupply voltage 230/240 V. 3 RadioFans.CN 收音机爱 好者资料库 Power su

10、pply voltage AC 230 VAC 240 V Consumed current 50 Hz 100 - 350 mA 2. Protection Circuitry The protection circuitry may have operated if either of the following conditions is noticed: - No sound is heard when the power is switched ON. - Sound stops during a performance. The functions of this circuitr

11、y is to prevent circuitry damage if, for example, the positive and negative speaker connection wires are shorted, or if speaker systems with an impedance less than the indicated rated impedance of this unit are used. If this occurs, follow the procedures outlined below. 1. Switch OFF the power. 2. D

12、etermine the cause of the problem and correct it. 3. Switch ON the power once again. Note: When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again. 3. Accessories - AC mains lead for (E),(EG) and (EP) areas (RJA0019-2X).1 pc. - AC m

13、ains lead for (EB) area (RJA0053-3X).1 pc. 4 - Remote control (EUR7702270).1 pc. - Remote control batteries (R6/LR6,”AA”,UM-3).1 pc. Note: These are available on sales route. - FM indoor antenna (RSA0007).1 pc. - AM loop antenna set (RSA0022-L).1 pc. - Speaker leads 5 (REE1234-1).2 pc. (Red/Black) (

14、REE1233-1).2 pc. (Gray/Blue) - Antenna plug adaptor for (EB) area (SJP9009).1 pc. 4. Caution for AC Mains Lead 6 5. Location of Controls 6. Operation Checks and Component Replacement / Procedures - This section describes procedures for checking the operation of the major printed circuit boards and r

15、eplacing the main components. - For reassembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are 7 described only when required. 6.1. Checking for the AC IN P.C.B. - Check the AC IN P.C.B. as shown below. 6.2. Checking for the operation P.C.B

16、. - Follow the (Step 1) - (Step 3) of item 6.1. 8 - Check the operation P.C.B. as shown below. 6.3. Checking for the main P.C.B. - Follow the (Step 1) - (Step 3) of item 6.1. 9 10 - Check the main P.C.B. as shown below. 6.4. Replacement for the regulator transistor - Follow the (Step 1) - (Step 3) o

17、f item 6.1. 11 6.5. Replacement for the power IC - Follow the (Step 1) - (Step 3) of item 6.1. - Follow the (Step 1) - (Step 6) of item 6.2. - Follow the (Step 1) - (Step 10) of item 6.3. 7. To Supply Power Source This unit is designed to operate on power supplied from system connected. / For system

18、 connection, refer to Fig. 7-1. Fig. 7-1. 12 When the unit has to test and service alone, use the following method to supply power source. 1. Short the section between W902A Pin 3 and C740 (-) (GND). (Refer to Fig. 7-2. ) 2. Connect this unit to an AC power supply cord. / (This unit come to stand-by

19、 mode.) 3. Turn the unit ON. Fig. 7-2. Notes: Use only this method when checking the voltage etc. / In case of checking the operations, use the system connections to supply power source. 8. Self-Diagnostic Function This unit is equipped with a self-diagnostic function which, in the event of a malfun

20、ction, 13 automatically displays a code indicating the nature of the malfunction. Use this self-diagnostic function when servicing the unit. 8.1. To display the malfunction code U70 CD: / U70 DECK: Automatically displays on the tuner/amplifier when a malfunction occurs. Refer to Fig. 8-1. F61: Autom

21、atically displays on the tuner/amplifier when a malfunction occurs. Refer to Fig. 8-1. Fig. 8-1. 8.2. To return to the normal display 1. For U70 CD/U70 DECK - Press an any operation button on the tuner/amplifier. - To re-display the code, switch the power off (POWER STANDBY button), and then switch

22、power back on again. 2. For F61 - If F61 is displayed, the power will automatically be switched off and the standby indicator will light up. - F61 will be displayed for 3 seconds, and then the clock will be displayed. 14 - To re-display the code, switch the power on. F61 will be re- displayed, and t

23、hen after 3 seconds the clock will be displayed and the power will automatically switch off. 8.3. Display contents 8.3.1. U70 CD/U70 DECK / (displayed automatically) - Problem or condition A bus-line communications error has occurred as a result of the flat cables being inserted incorrectly, thus pr

24、eventing the system from operating. - If U70 is displayed on the tuner/amplifier, the tape deck or CD Changer cannot be operated by remote control. - Correction Procedure 1. To check for correct insertion of flat cables. - Insert each connectors until you hear a click. - Insert the flat cables at th

25、e back of the unit in the order indicated. Refer to Fig. 8-2. Make sure the white side of the cables is on your right side. Refer to Fig. 8-3. Fig. 8-2. Fig. 8-3. 2. Breakage of flat cables. (Check and replace.) 3. If the problem is not corrected by items 1 and 2 above, this indicates a faulty IC. S

26、A-EH790: IC901 (C2BBFD000404) 15 SL-EH790: IC451 (C2BBGF000433) RS-DV290: IC701 (M38503M2406F) Check these ICs and replace. 8.3.2. F61 - Problem or condition When the power switch is switched on, it automatically switches back off, making it impossible to switch power on. - Correction procedure Faul

27、ty Tuner/Amplifier (SA-EH790) output IC (IC601). (When a DC voltage is applied to speaker terminals.) 9. Schematic Diagram Notes - This schematic diagram may be modified at any time with the development of new technology. Notes: S901: Power standby/on switch () S902: Clock/timer switch (CLOCK/TIMER)

28、 S903: Demo switch (DEMO) S904: Play timer/record timer switch / (PLAY/REC) S905: FM mode switch / (FM AUTO/MONO) S906: Tuning mode switch / (TUNING MODE) S907: Set switch (SET) S908: Source input switch / (INPUT SELECTOR) 16 S909: 6 ch discrete input switch / (6 CH DISCRETE INIPUT) S910: Tuning dow

29、n switch (TUNING, ) S911: Tuning up switch (TUNING, ) S912: Tuner/band switch (TUNER/BAND) S913: Digital super woofer switch / (DIGITAL S.WOOFER) S914: RDS display mode PS switch / (RDS DISP MODE-PS) S915: RDS display mode PTY switch / (RDS DISP MODE-PTY) VR901: Volume control VR (VOLUME) - Indicate

30、d voltage values are the standard values for the unit measured by the DC electronic circuit tester (high-impedance) with the chassis taken as standard. Therefore, there may exist some errors in the voltage values, depending on theinternalimpedance of the DC circuit tester. No mark : Power ON (FM or

31、AM) - Important safety notice: Components identified by mark have special characteristics important for safety. Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. When replacing any of components, be su

32、re to use only manufacturers specified parts shown in the parts list. - The supply part number is described alone in the replacement 17 parts list. - Voltage and signal line : Positive voltage line : Negative voltage line : Audio signal line : Tuner signal line Caution! IC and LSI are sensitive to s

33、tatic electricity. Secondary trouble can be prevented by taking care during repair. Cover the parts boxes made of plastics with aluminum foil. Ground the soldering iron. Put a conductive mat on the work table. Do not touch the legs of IC or LSI with the fingers directly. 10. Schematic Diagram 11. Pr

34、inted Circuit Board Diagram 12. Type Illustration of ICs, Transistors and Diodes 13. Wiring Connection Diagram 14. Block Diagram 15. Terminal Function of ICs 15.1. IC901 (C2BBFD000404): / System Control/FL Drive 18 Pin No. Terminal Name I/OFunction 1CHECKIClock check signal input 2LC72 DOOPLL data s

35、ignal output for tuner unit (Z120) 3LC72 CEOChip enable signal output for tuner unit (Z120) 4LC72 DI/ ST IIF count data/stereo detect signal input from tuner unit (Z120) 5LC72 CKOClock signal output for tuner unit (Z120) 6 ST/AV. / 6CH OSignal select output 7NC-Not used, open 8 9SEL TUNER -Not used,

36、 open 10SEL/ TUNER -Not used, connected to GND 11AC INIPower failure detect signal input 12RESETIReset signal input 13X INIOscillator connected terminal (32.7 kHz)14X OUTO 15 VSS -GND terminal 16XC INIOscillator connected terminal (6 MHz)17 XC OUTO 18 VDD 1 IPower supply terminal 19KEY TUIOperation

37、key signal input 20KEY KARAOKE IOperation key signal input 21 SH REQIRequest signal input from Sound Processor 22 NC(GND)-Not used, connected to GND 23 VR JOGBIVolume control signal input 24 VR JOGA 25 MIC DETI Microphone connecting detect signal input (Not used, connected to VDD ) 26HP SWI Headphon

38、e connecting detect signal input 27 RDS CLKIRDS clock signal input 28RDS DATA IRDS data signal input 29REMO / CON IRemote control signal input 19 Pin No. Terminal Name I/OFunction 30 | 37 8G | 1G O Grid signal output 38 | 45 P1 | P8 O Segment signal output 46 VDD 3 IPower supply terminal 47 | 50 P9

39、| P12 O Segment signal output 51-VPIPower supply terminal (Negative) 52 | 71 P13 | P32 O Segment signal output 72 VDD 4 IPower supply terminal 73 | 78 P33 | P38 O Segment signal output 79 REGIN0-Not used, connected to GND 80 REGIN1 81STANDBYOLED (STANDBY) drive signal output 82TIMEROLED (TIMER) driv

40、e signal output 83 S.W.LEDOLED (DIGITAL S.WOOFER) drive signal output 84 LOUNGE- LED (LOUNGE) drive signal output (Not used, connected to GND) 85 CHORUS- LED (CHORUS) drive signal output (Not used, connected to VDD ) 86MUTEOMuting signal output 87NC-Not used, open 88 POWEROPower control signal outpu

41、t 89 VSS 2 -GND terminal 90 VDD 2 IPower supply terminal 91MUTE2OMuting signal output 92NC-Not used, open 20 Pin No. Terminal Name I/OFunction 93MUTE3OMuting signal output 94SH CSI/O Chip select signal input/output for Sound Processor 95SH DOOSerial communication signal to Sound Processor (Data sign

42、al output) 96SH DIISerial communication signal to Sound Processor (Data signal input) 97SH CKISerial communication signal to Sound Processor (Clock signal input) 98E DETIUnusual condition detect signal input 99CR TIMER -Not used, open 100 SDIStation detector signal input from tuner unit (Z120) 16. R

43、eplacement Parts List Notes: * Important safety notice: Components identified by mark have special characteristics important for safety. / Furthermore, special parts which have purposes of fire-retardant (resistors), high-quality sound (capacitors), low-noise (resistors), etc. are used. / Whenreplac

44、ingany of components, be sure to use only manufactures specified parts shown in the parts list. * The parenthesized indications in the Remarks columns specify the areas. / Parts without these indications can be used for all areas. * Remote Control Assy: Supply period for three years from terminal of

45、 production. * Capacity values are in microfarads (uF) unless specified otherwise, P=Pico-farads(pF), F=Farads (F) * Resistance values are in ohms, unless specified otherwise, 1K= 1,000 (OHM), 1M=1,000K (OHM) *The markings (RTL) indicate that the retention time is limited for these items. After the

46、discontinuation of these assemblies in production, it will no longer be available. 21 *All parts are supplied by SPC. Ref. No.Part No.Part Name & DescriptionPcsRemarks 1RKM0395G-2SCABINET1 2RHD30007-1SSCREW4 3XTBS3+10JFZ1SCREW1 4REX0967SYSTEM CONNECT.ASSY(20P)1 5RMQ1018GASKET1 6RGW0386-SKNOB,VOLUME1

47、 7RHN90001NUT1 8RKA0106-NFOOT RING4 9RKF0606AC-K1BACK COVER1 10RKW0581-1VFL WINDOW1 11RMN0427ACABLE HOLDER1 12RYP1167-SFRONT PANEL ASSY1 12-1RGB0025-ATECHNICS BADGE1 13SHG1654RUBBER4 14XTB3+10JFZSCREW12 15XTB3+8JFZSCREW11 16XTW3+15TSCREW2 17XTBS3+8JFZ1SCREW2 18RLBT4001-NFERRITE CORE1J0KD00000028 19R

48、MN0582HOLDER1 20XTB3+12FFZSCREW1 21XTB3+20JFZSCREW1 22REM0115FAN1 23RGN2394-KNAME PLATE1(EB) 23RGN2396-KNAME PLATE1(EP) 24RMN0526FL HOLDER1 25REZ1300WIRE ASSY1 26RMN0744FAN SUPPORTER1 27RMN0745FAN SUPPORTER1 A1EUR7702270REMOTE CONTROLLER1 A1-1UR64EC2337EBATTERY COVER1 A2REE1233-1SPEAKER LEADS(GRAY/B

49、LUE)1 A3REE1234-1SPEAKER LEADS(RED/BLACK)1 A4SJP9009ANTENNA PLUG ADAPTOR1K1YZ02000013 (EB) A5RJA0019-2XAC POWER SUPPLY CORD1 (E)(EG)(EP) A5RJA0053-3XAC POWER SUPPLY CORD1 (EB) A6RQCA0801DEMO GUIDE1 A8RQT6897-EOPERATING INSTRUCTIONS1(E) Spanish A8RQT6865-DOPERATING INSTRUCTIONS1(EG) Germany Italian French Netherlands Danish Swedish