Technics-SADV280-cs-sm 电路图 维修手册.pdf

《Technics-SADV280-cs-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Technics-SADV280-cs-sm 电路图 维修手册.pdf（77页珍藏版）》请在收音机爱好者资料库上搜索。

1、Table Of Contents COVER 1 Accessories 2 Before Repair and Adjustment 3 About the Protection Circuitry 4 Caution for AC Main Lead 5 Operating Instructions 6 Operation Checks and Component Replacement Procedures 6.1 Checking for the AC IN P.C.B. 6.2 Checking for the operation P.C.B. 6.3 Checking for t

2、he main P.C.B. 6.4 Replacement for the regulator transistor 6.5 Replacement for the power IC 7 Self-Diagnostic Function 7.1 To display the malfunction code 7.2 To return to the normal display 7.3 Display contents 7.3.1 U70 DVD, U70 DECK(displayed automatically) 7.3.2 F61 8 To Supply Power Source 9 S

3、chematic Diagram Notes 9.1 Type Illustration of ICs, Transistors and Diodes 9.2 Schematic Diagram Notes 10 Schematic Diagram 11 Printed Circuit Board Diagram 12 Block Diagram 13 Wiring Connection Diagram 14 Terminal Function of ICs 14.1 IC901 (C2BBFD000317): System ControlFL Drive 15 Replacement Par

4、ts List 16 Cabinet Parts Location 17 Packaging 18 Schematic Diagram for printing with A4 size Service Manual TOP NEXT ORDER NO. AD0202035C2 Tuner/ Amplifier G SA-DV280EG/SA-DV280EB Colour (N).Gold Type System: SC-DV280 Because of unique interconnecting cables, when a compact requires service, send o

5、r bring in the entire system. Specification Amplifier Section Power output (Low frequency side) DIN 100Hz, THD 1%, 8 both channels driven: 2x45W RMS 100Hz, THD 10%, 8 both channels driven: 2x65W Power output (High frequency side) DIN 1kHz, THD 1%, 6 both channels driven: 2x25W RMS 1kHz, THD 10%, 6 b

6、oth channels driven: 2x35W Power output (prologic mode) DIN (front: high frequency) 1kHz, THD 1%, 6 both channels driven: 2x25W (front: low frequency) 100Hz, THD 1%, 8 both channels driven: 2x45W (surround) 1kHz, THD 1%, 8 both channels driven: 2x30W (center) 1kHz, THD 1%, 8: 60W RMS (front: high fr

7、equency) 1kHz, THD 10%, 6 both channels driven: 2x35W (front: low frequency) 100Hz, THD 10%, 8 both channels driven: 2x65W (surround) 1kHz, THD 10%, 8 both channels driven: 2x40W (center) 1kHz, THD 10%, 8: 80W Total harmonic distorition Rated power at 1kHz/ 6: 1% Half power at 1kHz/ 6: 0.1% Load imp

8、edance Front (high frequency): 6 (low frequency): 8 Surround: 8 Center: 8 RadioFans.CN 收音机爱 好者资料库 PV PV PV Digital S.WOOFER Center frequency: 60Hz LEVEL (VOL -20dB): MID+3dB MAX+6dB FM tuner section Frequency range: 87.50-108.00MHz (0.05MHz steps) Sensitivity: 1.8V (IHF usable) S/N 26dB: 1.5V S/N: M

9、ONO 70dB (75dB, IHF) Antenna terminals: 75 (unbalanced) AM tuner section Frequency range: 552-1629kHz (9kHz steps) 520-1630kHz (10kHz steps) Sensitivity (S/N 20dB): 500V/m Timer section Clock: Quartz-lock type Function: Play timer (1 time, daily) Rec timer (1 time, daily) Sleep (120 min., 30min., in

10、tervals) Setting intervals (PLAY/REC) 1 min., -23hours 59 min., (1 min. intervals) General Power consumption 230W STANDBY condition 0.5W Power supply For (EG) area: AC230V,50Hz For (EB) area: AC230-240V,50Hz Dimensions (WxHxD): 293x118.5x345mm Weight: 5.3kg Notes: 1.Design and specifications are sub

11、ject to change without notice. 2.Dimensions and weight are approximate. 3.Total harmonic distortion is measured by the digital spectrum analyzer. System/SC-DV280: Sound processor: SH-DV280, DVD/ Video CD/ CD changer: SL-DV280, Tuner/ Amplifier: SE-DV280 , Cassette Deck: RS-DV280, Speakers: Front* (S

12、B- DV280), Center* (SB-PC95),Surround* (SB-PS95) (*Made in MAES.) 2002 Matsushita Electric Industrial Co., Ltd. /All rights reserved. Unauthorized copying and distribution is a violation of law. TOP NEXT RadioFans.CN 收音机爱 好者资料库 1 Accessories TOP PREVIOUS NEXT TOP PREVIOUS NEXT RadioFans.CN 收音机爱 好者资料

13、库 2 Before Repair and Adjustment TOP PREVIOUS NEXT 1. Turn off the power supply. Using a 10 , 10W resistor, connect both ends of power supply capacitors (C701-704) in order to discharge the voltage. 2. Before turning the power supply on, after completion of repair, slowly apply the primary voltage b

14、y 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 respectto supply voltage 230 V/240 V. Areas(EG)(EB) Power supply voltageAC 230VAC 230-240V Consumed current 50 Hz 130-380 mA 50 Hz 130-380 mA TOP PREVIOUS NEXT 3 Abo

15、ut the Protection Circuitry TOP PREVIOUS NEXT The protection circuitry may have operated if either of the following conditions is noticed: *No sound is heard when the power is supplied. *Sound stops during a performance. The functions of this circuitry is to prevent circuitry damage, for example, th

16、e positive and negative speaker connection wires are “shorted”, or if speaker systems with an impedande less than the indicated rated impedance of thisunit are used. If this occurs, follow the procedure outlined below: 1. Press the STANDBY /ON button, switch to STANDBY mode. 2. Determine the cause o

17、f the problem and correct it. 3. Press the STANDBY /ON button once again, supply the power. Note: When the protection circuitry functions, the unit will not operate unless the STANDBY /ON button is first switched STANDBY and then ON again. TOP PREVIOUS NEXT 4 Caution for AC Main Lead TOP PREVIOUS NE

18、XT TOP PREVIOUS NEXT 5 Operating Instructions TOP PREVIOUS NEXT TOP PREVIOUS NEXT 6 Operation Checks and Component Replacement Procedures TOP PREVIOUS NEXT G This section describes procedures for checking the operation of the major printed circuit boards and replacing the main components. G For reas

19、sembly after operation checks or replacement, reverse the respective procedures. Special reassembly procedures are described only when required. 6.1 Checking for the AC IN P.C.B. 6.2 Checking for the operation P.C.B. 6.3 Checking for the main P.C.B. 6.4 Replacement for the regulator transistor 6.5 R

20、eplacement for the power IC TOP PREVIOUS NEXT 6.1 Checking for the AC IN P.C.B. TOP PREVIOUS NEXT G Check the AC IN P.C.B. as shown below. TOP PREVIOUS NEXT 6.2 Checking for the operation P.C.B. TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. G Check the operation P.C.B. as shown bel

21、ow. 6.3 Checking for the main P.C.B. TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. G Follow the (Step 1) - (Step 6) of item 6.2. G Check the main P.C.B. as shown below. TOP PREVIOUS NEXT 6.4 Replacement for the regulator transistor TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3)

22、 of item 6.1. 6.5 Replacement for the power IC TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6.1. G Follow the (Step 1) - (Step 6) of item 6.2. G Follow the (Step 1) - (Step 12) of item 6.3. TOP PREVIOUS NEXT 7 Self-Diagnostic Function TOP PREVIOUS NEXT This unit equipped with a self-di

23、agnostic function which, in the event of a malfunction, automatically displays a code indicating the nature of the malfunction. Use this self-diagnostic function when servicing the unit. 7.1 To display the malfunction code 7.2 To return to the normal display 7.3 Display contents 7.3.1 U70 DVD, U70 D

24、ECK(displayed automatically) 7.3.2 F61 TOP PREVIOUS NEXT 7.1 To display the malfunction code TOP PREVIOUS NEXT U70 DVD: Automatically displays on the U70 DECK: tuner/amplifier when a malfunction occurs. Refer to Fig. 7-1. F61: Automatically displays on the tuner/amplifier when a malfunction occurs.

25、Refer to Fig. 7-1. Fig. 7-1 TOP PREVIOUS NEXT 7.2 To return to the normal display TOP PREVIOUS NEXT 1. For U70 DVD/U70 DECK H Press an any operation button on the tuner/amplifier. H To re-display the code, switch the power off (POWER STANDBY button), and then switch power back on again. 2. For F61 H

26、 If F61 is displayed, the power will automatically be switched off and the standby indicator will light up. H F61 will be displayed for 3 seconds, and then the clock will be displayed. H To re-display the code, switch the power on. F61 will be re-displayed, and then after 3 seconds the clock will be

27、 displayed and the power will automatically switch off. TOP PREVIOUS NEXT 7.3 Display contents TOP PREVIOUS NEXT 7.3.1 U70 DVD, U70 DECK(displayed automatically) 7.3.2 F61 TOP PREVIOUS NEXT 7.3.1 U70 DVD, U70 DECK/(displayed automatically) TOP PREVIOUS NEXT G Problem or condition A bus-line communic

28、ations error has occurred as a result of the flat cables being inserted incorrectly, thus preventing the system from operating. H If U70 is displayed on the tuner/amplifier, the Cassette deck or DVD Changer cannot be operated by remote control. G Correction Procedure 1. To check for correct insertio

29、n of the flat cables. I Insert each connectors until you hear a click. I Insert the flat cables at the back of the unit in the order indicated. Refer to Fig. 7- 2. Make sure the white side of the cables is on your right side. Refer to Fig. 7-3. Fig. 7-2. Fig. 7-3. G Breakage of the flat cables. (Che

30、ck and replace.) G If the problem is not corrected by items 1 and 2 above, this indicates a faulty IC. SA-DV280: IC901 (C2BBFD000317) SL-DV280: IC401 (C2BBFD000307) RS-DV280: IC701 (M38503M2406F) Check these ICs and replace. TOP PREVIOUS NEXT 7.3.2 F61 TOP PREVIOUS NEXT G Problem or condition When t

31、he power switch is switched on, it automatically switches back off, making it impossible to switch power on. G Correction procedure Faulty Tuner/Amplifier (SA-DV280) output IC (IC601). (When a DC voltage is applied to speaker terminals.) TOP PREVIOUS NEXT 8 To Supply Power Source TOP PREVIOUS NEXT T

32、his unit SA-DV280 is designed to operate on power supplied form system connected. For system connection, refer to Fig. 8-1. Fig. 8-1. When the unit SA-DV280 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). (R

33、efer to Fig. 8-2.) 2. Connect this unit to an AC power supply cord. (This unit come to stand-by mode.) 3. Turn the unit ON. Fig. 8-2. Notes: Use only this method when checking the voltage etc. In case of checking operations, use the system connections to supply power source. TOP PREVIOUS NEXT 9 Sche

34、matic Diagram Notes TOP PREVIOUS NEXT 9.1 Type Illustration of ICs, Transistors and Diodes 9.2 Schematic Diagram Notes TOP PREVIOUS NEXT 9.1 Type Illustration of ICs, Transistors and Diodes TOP PREVIOUS NEXT TOP PREVIOUS NEXT 9.2 Schematic Diagram Notes TOP PREVIOUS NEXT G This schematic diagram may

35、 be modified at any time with the development of new technology. Notes: G S901: Power Standby/on ( ) switch. G S902: Echo (ECHO) switch. G S903: Clock/timer (CLOCK/TIMER) switch. G S904: Play timer/record timer ( PLAY/ REC) switch. G S905: FM mode (FM AUTO/MONO) switch. G S906: Tuning mode (TUNING M

36、ODE) switch. G S907: Set (SET) switch. G S908: Source input (INPUT SELECTOR) switch. G S910: Tuning ( ,TUNING) switch. G S911: Tuning ( ,TUNING) switch. G S912: Tuner/band (TUNER/BAND) switch. G S913: Digital super woofer (DIGITAL S. WOOFER) switch. G S914, 915: RDS display mode (RDS, PS-DISP, MODE-

37、PTY) switches. G VR901: Main volume V.R. G Indicated 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 the internalimpedance o

38、f the DC circuit tester. No mark: Power ON G 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.

39、When replacing any of components, be sure to use only manufactures specified parts shown in the parts list. Caution! G Secondary trouble can be prevented by taking care during repair. G IC and LSI are sensitive to static electricity. G Cover the parts boxes made of plastics with aluminum foil. G Gro

40、und the soldering iron. G Put a conductive mat on the work table. G Do not touch the legs of IC or LSI with the fingers directly. G Voltage and signal lines : Positive voltage line : Negative voltage line : FM signal line : AM signal line : Mic signal line : Audio signal line : FM OSC signal line :

41、AM OSC signal line TOP PREVIOUS NEXT 10 Schematic Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 11 Printed Circuit Board Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 12 Block Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 13 Wiring Connection Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 14 Terminal Functio

42、n of ICs TOP PREVIOUS NEXT 14.1 IC901 (C2BBFD000317): System Control/FL Drive TOP PREVIOUS NEXT 14.1 IC901 (C2BBFD000317): System Control/FL Drive TOP PREVIOUS NEXT Pin No.Terminal NameI/OFunction 1CHECKIClock check signal input 2LC72 DIOPLL data signal output for tuner unit (Z101) 3LC72 CEOChip ena

43、ble signal output for tuner unit (Z101) 4LC72 DI/STIIF count data/stereo detect signal input from tuner unit (Z101) 5LC72 CKOClock signal output for tuner unit (Z101) 6ST/AV.6CHOSignal select output 7NC- Not used, open 8 9SEL TUNER- Not used, open 10SEL/ TUNER - Not used, connected to GND 11AC INIPo

44、wer failure detect signal input 12RESETIReset signal input 13X INIOscillator connected terminal (32.7kHz) 14X OUTO 15VSS- GND terminal 16XC INIOscillator connected terminal (6 MHz) 17XC OUTO 18VDD 1IPower supply terminal 19KEY TUIOperation key signal input 20KEY KARAOKEIOperation key signal input 21

45、SH REQIRequest signal input from Sound Processor 22NC(GND)- Not used, connected to GND 23VR JOGBIVolume control signal input 24VR JOGA 25MIC DETIMicrophone connecting detect signal input (Not used, connected to VDD) 26HP SWIHeadphone connecting detect signal input 27RDS CLKIRDS clock signal input 28

46、RDS DATAIRDS data signal input 29REMOCONIRemote control signal input 30-378G-1GOGrid signal output 38-45P1-P8OSegment signal output 46VDD 3IPower supply terminal 47-50P9-P12OSegment signal output 51-VPIPower supply terminal (Negative) 52-71P13-P32OSegment signal output 72VDD 4IPower supply terminal

47、73-78P33-P38OSegment signal output 79REGIN0- Not used, connected to GND 80REGIN1 81STANDBYOLED (STANDBY) drive signal output 82TIMEROLED (TIMER) drive signal output 83S.W.LEDOLED (DIGITAL S.WOOFER) drive signal output 84LOUNGE- LED (LOUNGE) drive signal output (Not used, connected to GND) 85CHORUS-

48、LED (CHORUS) drive signal output (Not used, connected to VDD) 86MUTEOMuting signal output 87NC- Not used, oppen 88POWEROPower control signal output 89VSS 2- GND terminal 90VDD 2IPower supply terminal 91MUTE2OMuting signal output 92NC- Not used, open 93MUTE3OMuting signal output 94SH CSOChip select signal output for Sound Processor 95SH DOOSerial communication signal to Sound Processor (Data signal output) 96SH DIISerial communication signal to Sound Proccessor (Data signal input) 97SH CKISerial communication signal to Sound Processor (Clock signal input) 98E DETIUnusua