Technics SA-DV250 Service Manual Download

Page: 12 / 16

SCHEMATIC DIAGRAM-6

CN781

Q551
2SA1995RSTA

SIGNAL LEVEL DET.

Q555
2SD2144STA

SIGNAL LEVEL DET.

Q702
2SB1548PQAU

REGULATOR

Q725
2SC5398RSTA

STABILIZER

Q705
2SA1995RSTA

STABILIZER

Q701
2SD2374PQAU

REGULATOR

R556

100K

R557

10K

C721

10V100

D725

MA4082L

R729

220

C723

0.047

C639

1000P

C640

1000P

C641

1000P

C642

1000P

C732

0.022

C647

1000P

D738

MA165T

D730

MA4091HT

R768

100

R724

3.9K

C718

16V100

D723

MA4150HT

R723

5.6K

C719

0.047

R725

C724

0.047

C710

0.047

R546

18K

R551

18K

R552

47K

R555

22K

C550

0.01

D552

MA165TA

D555

MA4100MTA

R547

18K

E602

E601

R749

D739

MA165T

POWER SUPPLY CIRCUIT

4 5 6 7 8 9

W701B

4 5 6 7 8 9

R720

3.9K

C734

50V3.3

D758

MA165T

C722

16V100

C720

0.047

C717

16V33

MAIN CIRCUIT

R765

220

R569

10K

D554

MA165T

C371

6.3V100

Q556
2SC5398RSTA

SWITCHING

R568

100

D553

MA700T

C556

16V10

C555

16V10

Q557
2SA1995RSTA

MOTOR DRIVE

Q553
2SD2144STA

MOTOR DRIVE

R570

2.2M

R560

100K

C559

0.01

D581

RL1N4003N02

R567

FAN MOTOR

JK551

R566

68K

Q554
2SA1995RSTA

SIGNAL LEVEL DET.

R719

3.3K

Q703,704
2SD2137PQTA

REGULATOR

R796

2.2

Q703

Q704

R769

R727

3.9K

C554

10V220

R561
100K

C552

0.01

R559

4.7K

R591

4.7K

C551

50V2.2

D551

MA165T

D583

RL1N4003N02

R721

4.7

R722

2.2

R753

0.47

R754

0.47

Q711,712
2SB1548PQAU

REGULATOR

Q711

R797

2.2

R767

R558

2.2K

D582

RL1N4003N02

Q712

: POSITIVE VOLTAGE LINE
: NEGATIVE VOLTAGE LINE

29.2V

:AUDIO SIGNAL LINE

29.2V

14.7V

15.2V

-30.1V

-11V

-10.4V

-11V

-0.6V

14.1V

13.6V

9.6V

10.2V

10.4V

-10.4V

14.7V

7.6V

0.3V

-10.4V

7.6V

6.8V
FAN ON:1.6V

FAN ON:0V

0.5V

FAN ON:0V

4.7V

0.5V

8.1V

30.1V

7.6V

10.4V

13.6V

10.4V

14.1V

13.6V

Summary of Contents for SA-DV250

Page 1: ...driven 2x35W Power output prologic mode DIN front high frequency 1kHz THD 1 6Ω both channels driven 2x25W front low frequency 100Hz THD 1 8Ω both channels driven 2x45W surround 1kHz THD 1 8Ω both channels driven 2x30W center 1kHz THD 1 8Ω 60W RMS front high frequency 1kHz THD 10 6Ω both channels driven 2x35W front low frequency 100Hz THD 10 8Ω both channels driven 2x65W surround 1kHz THD 10 8Ω bot...

Page 2: ...ion code TOP PREVIOUS NEXT Fig 7 1 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 Refer to Fig 7 1 ...

Page 3: ...button and then switch 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 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 ...

Page 4: ... or DVD Changer cannot be operated by remote control l Correction Procedure 1 To check for correct insertion of the flat cables n Insert each connectors until you hear a click n Insert the flat cables at 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 2 Breakage of the flat cables Check and r...

Page 5: ...http servis manual com SL DV250 IC401 M38504E6227F RS DV250 IC701 M38503M2406F Check these ICs and replace TOP PREVIOUS NEXT ...

Page 6: ...or condition When the power switch is switched on it automatically switches back off making it impossible to switch power on l Correction procedure Faulty Tuner Amplifier SA DV250 output IC IC601 When a DC voltage is applied to speaker terminals TOP PREVIOUS NEXT ...

Page 7: ...2 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 53 54 2 5 7 9 W905 S901 C928 25V22 NOTE The number which noted at the connectors on the schematic diagram as SCHEMATIC DIAGRAM 1 or SCHEMATIC DIAGRAM 2 indicates the schematic diagram serial number located on the left corner in the schematic diagram A OPERATION CIRCUIT C919 25V22 C927 25V22 C396 0 047 C923 0 1 C395 0 047 D974 MA165TA C907 470...

Page 8: ...1 92 93 94 95 96 97 98 99 100 VP P13 P14 P15 P16 P17 P18 P19 P20 P21 P22 P23 P24 P25 P26 P27 P28 P29 P30 P31 P32 VDD4 P33 P34 P35 P36 P37 P38 REGIN0 REGIN1 8G REMOCON RDS DATA RDS CLK HP SW MIC DET VR JOGA VR JOGB NC GND SH REQ KEY KARAOKE KEY TU VDD1 XC OUT XC IN Vss X OUT X IN RESET AC IN SEL TUNER SEL TUNER ST AV 6CH LC72 CK LC72 DI ST LC72 CE LC72 DO CHECK STAND BY TIMER S W LED LOUNGE CHORUS ...

Page 9: ...K R943 100 C917 0 01 C155 1000P C153 1000P C160 1000P C159 6 3V47 R152 1K R151 1K C154 560P C158 6 3V47 C151 16V10 D907 MA165TA M B C R946 1K C909 1000P C918 6 3V100 D E A R941 1K L153 1 H R155 120 D151 MA4051MTA L151 100 H L152 100 H C156 47P C157 47P A B C D E F G H I J K L N O Q S T A OPERATION CIRCUIT R942 2 2K R974 1K C931 16V10 R965 3 9K R966 3 9K D961 MA4075MTA R975 22K D906 MA165TA U N 1 2...

Page 10: ... 9 10 11 12 13 14 1 20 2 1 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 K L M I J E F C D E F G E F G A B C D A B G H C601 16V10 R598 2 2K R597 2 2K R205 100K H G R202 100K B C D E F C509 0 01 C510 0 01 R693 1K R692 1K C664 16V10 C725 16V47 A C R696 47K Q609 610 2SD2144STA MUTING Q609 Q610 Q612 UN411FTA MUTING CONT B C R694 22K R511 47 R509 47 R512 47 R510 47 W501 D719 RL1N4003N02 D720 RL1N4003N02 ...

Page 11: ...602 3 3K R618 4 7K Q601 602 2SC5398RSTA PROTECTOR D607 1SS291TA L K D658 MA165TA D657 MA165TA B A R685 1K R686 1K Q607 608 2SD2144STA MUTING Q607 Q608 C705 0 01 G R776 10K Q709 2SD2144STA SWITCHING POWER R738 3 9K R739 47K C622 10V100 D659 MA165TA D751 1N5402BM21 D703 1N5402BM21 D753 RL1N4003N02 D761 RL1N4003N02 D755 RL1N4003N02 D752 1N5402BM21 D702 1N5402BM21 D704 1N5402BM21 G F E D A B C D558 MA...

Page 12: ... CIRCUIT B G R765 220 N R569 10K D554 MA165TA C371 6 3V100 Q556 2SC5398RSTA SWITCHING R568 100 D553 MA700TA C556 16V10 C555 16V10 Q557 2SA1995RSTA MOTOR DRIVE Q553 2SD2144STA MOTOR DRIVE R570 2 2M R560 100K C559 0 01 D581 RL1N4003N02 R567 22 FAN MOTOR JK551 R566 68K Q554 2SA1995RSTA SIGNAL LEVEL DET M R719 3 3K Q703 704 2SD2137PQTA REGULATOR R796 2 2 Q703 Q704 R769 27 R727 3 9K C554 10V220 R561 10...

Page 13: ...642 10 C620 0 1 C630 0 1 R640 10 L602 C637 0 047 C636 0 047 R652 10 C626 0 1 C628 0 1 R650 10 L606 C632 0 047 SPEAKERS GND GND C OUT C OUT GND GND GND GND SUR L OUT SUR L OUT SUR R OUT SUR R OUT ECO SH SYNC SA SYNC D GND BU5V RS13V B NC To POWER TRANSFORMER A CIRCUIT W722B on SCHEMATIC DIAGRAM 8 W722A W721A 2 1 3 4 5 6 7 8 9 10 2 1 3 4 E F H D C G F E D E To POWER TRANSFORMER A CIRCUIT W721B on SC...

Page 14: ...03 D AC IN CIRCUIT 2 1 3 4 5 6 7 8 9 10 11 12 2 1 3 4 5 6 7 8 R777 1K R774 18 D711 RL1N4003N02 R773 18 R712 2 2K A B C A C B R795 3 9K D743 RL1N4003N02 D741 RL1N4003N02 D742 RL1N4003N02 D744 RL1N4003N02 R771 2 2K D740 MA165TA POWER TRANSFORMER B CIRCUIT F POWER TRANSFORMER A CIRCUIT E W722B W721B 10 2 1 3 4 5 6 7 8 9 CN713 CN712 CN711 W1 W3 W2 2 1 3 4 R772 22K A B C D R792 RSFMB50KT L SPEAKERS To ...

Page 15: ... D E F LC72131M PLL FREQUENCY SYNTHESIZER AM ANT EXT LOOP FM ANT 75 SCHEMATIC DIAGRAM 9 100 0 01 100 2SC2413 BUFFER AMP 2SK360 FM OSC 2SK360 RF AMP 22P 15P 22P 0 022 2 7K 47P 33K 100K 2P 8P 10K 10K 33K 33K 100K 0 022 100 27P 2P 4P 10K 220 0 022 0 022 150 5P 18P 27P 2SC2059 FM MIXER 0 47 H 0 47 H 10P 33P 330P 580P 1P 5P 680 2 2K 0 220 1 H 820K 2 2M 0 022 680 1000P 330 1P 5P 6P 10P 6 220 5P 5P 12P 0...

Page 16: ...0 01 150P 68K 0 1 10 22K 4 7 4 7 47K 1000P 3 3 A D B C 10K 0 01 330 1000P LA1833MN FM AM IF AMP DET AM OSC MIX FM MPX A B B A D A 2SC2712 SWITCHING 3 3K 2SC2413 FM IF AMP 2SC2413 FM IF AMP 330 SCHEMATIC DIAGRAM 10 11 1 3 2 4 5 6 7 8 9 10 1K 10K 470 4 7K 22K 0 022 0 1 DTA114 POWER SUPPLY FM ON 1K 10K 100P 1000P 0 01 0 068 10K 100K 1K 10K 270 680 270K 680K 10P 39P 270K 680K CL DO DI Lch OUT CE Rch O...

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