Technics-SADV250-cs-sm 电路图 维修手册.pdf

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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 Rad

3、ioFans.CN 收音机爱 好者资料库 9 Schematic 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 Control/FL

4、 Drive 15 Replacement Parts List 16 Cabinet Parts Location 17 Packaging RadioFans.CN 收音机爱 好者资料库 Service Manual TOP NEXT ORDER NO. AD0103076C2 Stereo tuner/ amplifier G SA-DV250 Colour (S).Silver Type Areas EB.Great Britain. EG.Europe. System: SC-DV250 Because of unique interconnecting cables, when a

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

6、 both channels driven: 2x25W RadioFans.CN 收音机爱 好者资料库 RMS 1kHz, THD 10%, 6 both 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 bo

7、th channels driven: 2x30W (center) 1kHz, THD 1%, 8: 60W RMS (front: high frequency) 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

8、distorition Rated power at 1kHz/ 6: 1% Half power at 1kHz/ 6: 0.1% Load impedance Front (high frequency): 6 (low frequency): 8 Surround: 8 Center: 8 FM tuner section Frequency range: 87.50-108.00MHz (0.05MHz steps) Sensitivity (S/N 26dB): 1.5V S/N: MONO 70dB (75dB, IHF) Antenna terminals: 75 (unbala

9、nce) 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., intervals) Setting intervals (PLAY/REC) 1 min., -23ho

10、urs 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): 293x118.5x343mm Weight: 5.3kg Notes: 1.Design and specifications are subject to change without notice. 2.Dimensions and wei

11、ght are approximate. 3.Total harmonic distortion is measured by the digital spectrum analyzer. System/SC-DV250: Sound processor: SH-DV250, DVD/ Video CD/ CD changer: SL-DV250, Stereo tuner/ amplifier: SE-DV250 , Cassette Deck: RS-DV250, Speakers: Front (SB-DV250), Center(SB-PC95), Surround (SB-PS95)

12、 (Made in MAES.) 2001 Matsushita Electric Industrial Co., Ltd. /All rights reserved. Unauthorized copying and distribution is a violation of law. TOP NEXT 1 Accessories TOP PREVIOUS NEXT TOP PREVIOUS NEXT 2 Before Repair and Adjustment TOP PREVIOUS NEXT 1. Turn off the power supply. Using a 10 , 10W

13、 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 by using a power supply voltage controller to make sure that the consumed current at 50 Hz in NO S

14、IGNAL 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 About the Protection Circuitry TOP PREVIOUS NEXT The protection circuitry may have operated if eithe

15、r 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, the positive and negative speaker connection wires are “shorted”, or if speaker systems with an imp

16、edande 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 of the problem and correct it. 3. Press the STANDBY /ON button once again, supply the power. Note:

17、 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 NEXT TOP PREVIOUS NEXT 5 Operating Instructions TOP PREVIOUS NEXT TOP PREVIOUS NEXT 6 Operation Che

18、cks 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 reassembly after operation checks or replacement, reverse the respective procedures. Special reassemb

19、ly 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 Replacement for the power IC TOP PREVIOUS NEXT 6.1 Checking for the AC IN P.C.B. TOP PREVIOUS NEXT

20、 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 below. 6.3 Checking for the main P.C.B. TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3) of item 6

21、.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) of item 6.1. 6.5 Replacement for the power IC TOP PREVIOUS NEXT G Follow the (Step 1) - (Step 3)

22、 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-diagnostic function which, in the event of a malfunction, automatically displays a code indicating

23、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 DECK(displayed automatically) 7.3.2 F61 TOP PREVIOUS NEXT 7.1 To display the malfunction code TOP

24、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. Refer to Fig. 7-1. Fig. 7-1 TOP PREVIOUS NEXT 7.2 To return to the normal display TOP PREVIOUS NE

25、XT 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 If F61 is displayed, the power will automatically be switched off and the standby indicator will

26、 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 displayed and the power will automatically switch off. TOP PREVIOUS NEXT 7.3 Display contents TO

27、P 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 communications error has occurred as a result of the flat cables being inserted incorrectly, thus prevent

28、ing 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 insertion of the flat cables. I Insert each connectors until you hear a click. I Insert the flat cables a

29、t the 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. 7-2. Fig. 7-3. G Breakage of the flat cables. (Check and replace.) G If the problem is not corrected by items 1 and 2 above, this indicates a fault

30、y IC. SA-DV250: IC901 (C2BBFD000317) SL-DV250: IC401 (M38504E6227F) RS-DV250: IC701 (M38503M2406F) Check these ICs and replace. TOP PREVIOUS NEXT 7.3.2 F61 TOP PREVIOUS NEXT G Problem or condition When the power switch is switched on, it automatically switches back off, making it impossible to switc

31、h power on. G Correction procedure Faulty Tuner/Amplifier (SA-DV250) output IC (IC601). (When a DC voltage is applied to speaker terminals.) TOP PREVIOUS NEXT 8 To Supply Power Source TOP PREVIOUS NEXT This unit SA-DV170 is designed to operate on power supplied form system connected. For system conn

32、ection, refer to Fig. 8-1. Fig. 8-1. When the unit SA-DV170 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. 8-2.) 2. Connect this unit to an AC power supply cord. (This unit come to stand-by m

33、ode.) 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 Schematic Diagram Notes TOP PREVIOUS NEXT 9.1 Type Illustration of ICs, Transistors and Diodes 9.2 Sc

34、hematic 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 be modified at any time with the development of new technology. Notes: G S901: Power Standby/on

35、( ) 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 MODE) switch. G S907: Set (SET) switch. G S908: Source input (INPUT SELECTOR) switch. G S910: Tuni

36、ng ( ,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-PTY) switches. G VR901: Main volume V.R. G Indicated voltage values are the standard values for t

37、he 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 of the DC circuit tester. No mark: Power ON G Important safety notice: Components identified by ma

38、rk 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 sure to use only manufactures specified parts shown in the p

39、arts 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 Ground the soldering iron. G Put a conductive mat on the work table. G Do not touch the legs of IC o

40、r 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 : AM OSC signal line TOP PREVIOUS NEXT 10 Schematic Diagram TOP PREVIOUS NEXT TOP PREVIOUS NEXT 11

41、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 Function of ICs TOP PREVIOUS NEXT 14.1 IC901 (C2BBFD000317): System Control/FL Drive TOP PREVIOUS NEXT 1

42、4.1 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 enable signal output for tuner unit (Z101) 4LC72 DI/STIIF count data/stereo detect signal input from

43、 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 INIPower failure detect signal input 12RESETIReset signal input 13X INIOscillator connected terminal (

44、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 21SH REQIRequest signal input from Sound Processor 22NC(GND)- Not used, connected to GND 23VR JOGBI

45、Volume 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 28RDS DATAIRDS data signal input 29REMOCONIRemote control signal input 30-378G-1GOGrid signal outpu

46、t 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 73-78P33-P38OSegment signal output 79REGIN0- Not used, connected to GND 80REGIN1 81STANDBYOLED (S

47、TANDBY) 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- LED (CHORUS) drive signal output (Not used, connected to VDD) 86MUTEOMuting signal output 87NC- N

48、ot 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 DETIUnusual condition detect signal