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Technics SH-DV250 Service Manual

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ORDER NO.AD0103077C2
Sound Processor
SH-DV250
Colour
(S) ...................Silver Type
Area
EG .....................Europe.
System: SC-DV250
Because of unique interconnecting cables,when a
component requires servise,send or bring in the entire
system.
Note: Refer to the service manual for Model No.
SA-DV250 (ORDER NO.AD0103076C2) for
information on "ACCESSORIES"and "PACKAGING".
SPECIFICATIONS
Specification
1

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Summary of Contents for Technics SH-DV250

  • Page 1 ORDER NO.AD0103077C2 Sound Processor SH-DV250 Colour (S) ....Silver Type Area EG .....Europe. System: SC-DV250 Because of unique interconnecting cables,when a component requires servise,send or bring in the entire system. Note: Refer to the service manual for Model No. SA-DV250 (ORDER NO.AD0103076C2) for information on “ACCESSORIES”and “PACKAGING”.
  • Page 2 1.Design and specifications are subject to change without notice. 2.Dimensions and weight are approximate. System Sound Processor: SH-DV250, DVD/ Video CD/ CD changer: SL- DV250, Stereo tuner/ amplifier: SA-DV250, Cassette Deck: RS- DV250, Speakers: Front (SB-DV250), Center (SB-PC95), Surround (SB-PS95) (Made in MAES)

  • Page 3: Before Repair

    1. Before Repair This equipment (SH-DV250), which is the component of the system, is supplied with power from the amplifier (SA-DV250).When repairing this equipment or checking operation of the system, be sure to connect the amplifier with it.
  • Page 4 - Check the FL P.C.B. as shown below. / / / 3.2. Checking for the main P.C.B. - Follow the (Step 1) - (Step 3) of item 3.1.
  • Page 5 - Check the main P.C.B. as shown below.

  • Page 6: Schematic Diagram Notes

    4. Wiring Connection Diagram 5. Block Diagram 6. To Supply Power Source This unit is designed to operate on power supplied from system connected. When a component requires service, use the system connections to supply power source. For system connections. (Refer to Fig. 1) Fig.
  • Page 7 - S601: Display mode (DISPLAY MODE) switch. - S602: DOLBY PRO LOGIC ( PRO LOGIC, OFF/ ON) switch. - S603: Super surround (SUPER SURROUND) switch . - S604: Super sound EQ (SUPER SOUND EQ) switch . - S605: Center focus (CENTER FOCUS) switch. - S606: Virtual rear surround (VIRTUAL REAR SURROUND) switch.
  • Page 8 : Positive voltage line : CD Playback signal line : Negative voltage line 8. Schematic Diagram 9. Printed Circuit Board Diagram 10. Terminal Function of IC's 10.1. IC601(C2BBGF000251):System control/FL drive Mark I/O / Function Division KEY1 Operation key1 signal input terminal KEY2 Operation key2 signal input...
  • Page 9 Mark I/O / Function Division DSP DI Data signal input terminal for IC401 JOGA JOG A signal input terminal JOGB JOG B signal input terminal CNVSS Connected to GND through resistor RESET System reset signal input terminal Not used, open Not used, open GND terminal Ceramic oscillator input...
  • Page 10 Mark I/O / Function Division 37 LED SSS LED(SUPER SURROUND)signal output terminal 38 LED DPL LED(DOLBY PRO LOGIC) signal output terminal ORANGE LED (SEAT POSITION) signal output terminal GREEN LED (SEAT POSITION) signal output terminal ORANGE LED (3D ENHANCED SURROUND) signal output terminal GREEN LED (3D ENHANCED SURROUND)

  • Page 11: Replacement Parts List

    Mark I/O / Function Division CD REQ Serial data request signal output terminal for DVD DECK Serial data request signal output terminal for deck machanism CD& Chip select signal input DECK terminal (DVD and deck machanism) AVSS GND terminal VREF Reference voltage input terminal REG IN0...
  • Page 12 Ref. No. Part No. Part Name & Description Remarks RKA0105-K RUBBER RKA0106-N FOOT RING RYP1034-S FRONT PANEL ASS’Y RGB0025-A TECHNICS BADGE RKW0576A-1V FL WINDOW RGK1242-S JOG RING ORNAMENT RGW0344-S1 JOG KNOB RGW0345-S JOY KNOB RMB0594 JOY SPRING RMQ0882 JOY LEVER...
  • Page 13 Ref. No. Part No. Part Name & Description Remarks C347,48 ECBT1H220J5 50V 22P F1D1H220A006 C349,50 ECA1CAK100XB 16V 10U C351,52 ECBT1C103MS5 16V 0.01U F1D1C103A004 C354 ECA1CAK100XB 16V 10U C356 ECA1CAK100XB 16V 10U C401 ECUVNE223KBV 25V 0.022U F1H1E223A050 C402,03 ECUVNH103KBV 25V 0.01U F1H1H103A748 C404 ECA0JAK470XH...
  • Page 14 Ref. No. Part No. Part Name & Description Remarks C806,07 ECUV1H222KBV 50V 2200P C808-10 ECUVNH103KBV 25V 0.01U F1H1H103A748 C811 ECUVNE223KBV 25V 0.022U F1H1E223A050 C812 ECUVNC104KBV 16V 0.1U C813 ECUVNH103KBV 25V 0.01U F1H1H103A748 C814 ECUVNJ105KBV 63V 1U F1H0J105A002 C815 ECUVNE223KBV 25V 0.022U F1H1E223A050 C816 ECUVNC104KBV...
  • Page 15 Ref. No. Part No. Part Name & Description Remarks D304,05 MA719TA DIODE MA2C71900A D601-04 1SS291TA DIODE D605-08 MA165 DIODE MA2C165 D609,10 MA165 DIODE MA2C165 D611,12 LNJ301MPUJAD D613-17 SML79455C D653 MA165 DIODE MA2C165 D761 MA4082LTA DIODE MAZ40820LF D762 RL1N4003N02 DIODE D763-66 MA165 DIODE MA2C165...
  • Page 16 Ref. No. Part No. Part Name & Description Remarks Q307-10 2SC3327A TRANSISTOR Q313-16 2SC3327A TRANSISTOR Q501,02 UN411FTA TRANSISTOR UNR411F00A Q503-05 2SC3327A TRANSISTOR Q506 UN411FTA TRANSISTOR UNR411F00A Q507 2SC3327A TRANSISTOR Q601 UN4211 TRANSISTOR UNR4211 Q602-04 2SC3311ATA TRANSISTOR 2SC3311A0A Q605,06 UN5211TX TRANSISTOR UNR521100L Q761,62 2SD2137PQTA...
  • Page 17 Ref. No. Part No. Part Name & Description Remarks R297,98 ERDS2FJ471 1/4W 470 R303,04 ERDS2FJ223 1/4W 22K R305-08 ERDS2FJ102 1/4W 1K R309,10 ERDS2FJ561 1/4W 560 R311 ERDS2FJ223 1/4W 22K R312 ERDS2FJ182 1/4W 1.8K R313,14 ERDS2FJ392 1/4W 3.9K R315,16 ERDS2FJ274 1/4W 270K R317 ERDS2FJ223 1/4W 22K...
  • Page 18 Ref. No. Part No. Part Name & Description Remarks R502 ERDS2FJ102 1/4W 1K R503 ERDS2FJ122 1/4W 1.2K R504 ERDS2FJ124 1/4W 120K R505 ERDS2FJ102 1/4W 1K R506 ERDS2FJ272 1/4W 2.7K R507 ERDS2FJ105 1/4W 1M R508 ERDS2FJ104 1/4W 100K R509 ERDS2FJ222 1/4W 2.2K R510 ERDS2FJ104 1/4W 100K...
  • Page 19 Ref. No. Part No. Part Name & Description Remarks R661 ERDS2FJ223 1/4W 22K R662 ERDS2FJ102 1/4W 1K R663,64 ERDS2FJ331 1/4W 330 R665-67 ERDS2FJ473 1/4W 47K R668 ERDS2FJ222 1/4W 2.2K R671-80 ERJ6GEYJ104V 1/10W 100K R681 ERJ3GEYJ222V 1/16W 2.2K R682 ERJ3GEY0R00V 1/16W 0 R686 ERJ3GEY0R00V 1/16W 0...

  • Page 20: Cabinet Parts Location

    Ref. No. Part No. Part Name & Description Remarks R877,78 ERJ3GEYJ223V 1/16W 22K D0GB223JA002 R879,80 ERJ3GEYJ222V 1/16W 2.2K R881 ERJ3GEYJ101V 1/16W 100 R882 ERJ3GEYJ105V 1/16W 1M R888,89 ERJ3GEYJ331V 1/16W 330 R890 ERJ3GEYJ103Z 1/16W 10K R891,92 ERJ3GEYJ222V 1/16W 2.2K R898 ERJ3GEY0R00V 1/16W 0 R900 ERJ3GEY0R00V...
  • Page 21 H010400000KA/HH...
  • Page 22 FL P.C.B. FW602B R616 S601 D604 R668 DISPLAY MODE D603 C624 Q601 R667 R647 C627 B C E C615 R643 C605 R644 D605 C616 R618 C625 R610 R664 D609 R617 C612 C614 C610 D610 S602 R663 L601 DOLBY FL601 PRO LOGIC OFF/ON Q605 R674...
  • Page 23 MAIN P.C.B. E101 FW602A L814 R827 C838 L807 IC281 C802 C839 C819 C284 C801 R802 C833 C288 C829 X801 C806 C818 R835 IC203 C772 R298 C820 C816 R804 R803 Q766 C832 R820 C285 C804 R290 R805 B C E C805 R818 C286 R291...

  • Page 24: Schematic Diagram

    NOTE: SCHEMATIC DIAGRAM-1 :POSITIVE VOLTAGE LINE The number which noted at the connectors on the schematic diagram as :NEGATIVE VOLTAGE LINE "SCHEMATIC DIAGRAM-1" or "SCHEMATIC DIAGRAM-2" FL CIRCUIT indicates the schematic diagram serial number located on the left corner in the schematic diagram. FL601(A2BD00000041) FL DISPLAY 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43...
  • Page 25 SCHEMATIC DIAGRAM-2 :POSITIVE VOLTAGE LINE R668 2.2K D607 MA165TA FW601B 2.7V 1.2V CD REQ 0.4V 0.5V R612 Q602 Q603 S CLK S DATA DECK REQ Q604 MAIN R658 0.5V SYNC 4.7K CIRCUIT(FW601A) on SCHEMATIC Q602-604 DIAGRAM-9 2SC3311ATA SA DATA INTERFACE SA CLK CS/ REQ D.GND...
  • Page 26 SCHEMATIC DIAGRAM-3 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE E101 A B C R259 R131 R257 8.2K R103 R211 JK102 2.2K -10.4V R104 VCR(EXT) IC201 R105 JK102 NJU7313AMT2 SIGNAL SELECTOR DATA 9.4V R296 R106 R113 JK101 R256 4.7K...
  • Page 27 SCHEMATIC DIAGRAM-4 :POSITIVE VOLTAGE LINE FL CIRCUIT(FW602B) :NEGATIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE on SCHEMATIC DIAGRAM-2 IC281,282 NJM4558MTE1 BUFFER AMP R292 FW602A C287 C281 R293 R298 C289 R291 R288 R285 R286 16V10 C B A 9.4V 9.4V IC282 IC281 -10.4V -10.4V R297...
  • Page 28 SCHEMATIC DIAGRAM-5 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE 5.1V R812 R811 4.7K 5.1V R814 L801 100K C828 R816 50V4.7 C829 R817 50V4.7 2.5V 2.5V C811 LIN4 ELRI/ O 0.022 2.5V LIN3 SYNC C831 R819 2.5V C812 LIN2 GND R 50V4.7 5.1V...
  • Page 29 SCHEMATIC DIAGRAM-6 :POSITIVE VOLTAGE LINE R861 100K R890 L806 5.1V L814 R856 CK01 TST0 CK00 TST1 R858 TST2 TP12 TST3 TP11 C864 5.1V TP10 6.3V47 C862 2.5V VRM1 470P R859 2.5V IC802 M IN 2.5V C2HBZC000008 M OUT C863 6.3V47 4.3V DIGITAL SIGNAL VRM2...
  • Page 30 SCHEMATIC DIAGRAM-7 MAIN CIRCUIT :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE C301 R313 C303 C307 L301 50V4.7 3.9K 50V4.7 C305 R315 100P 270K R305 R307 0.6V 0.6V Q301 Q303 -10.4V R311 IC301 Q301,302 Q303,304 M5218AP 2SD2144STA 2SD2144STA BUFFER AMP MUTING ATTENUATOR...
  • Page 31 SCHEMATIC DIAGRAM-8 :POSITIVE VOLTAGE LINE :NEGATIVE VOLTAGE LINE 5.1V D762 R761 Q761 RL1N4003N02 7.2V 10.2V Q764 Q766 2SB621ARSTA R765 R764 2SA1309ATA 7.8V REGULATOR REGULATOR 5.1V 5.1V D761 Q765,767 MA4082LTA R762 Q762 2SC3311ATA 5.4V 5.4V C765 C767 7.2V 10.2V STABILIZER 0.01 0.01 Q761,762 R773...
  • Page 32 SCHEMATIC DIAGRAM-9 :POSITIVE VOLTAGE LINE :CD PLAYBACK SIGNAL LINE MAIN CIRCUIT :NEGATIVE VOLTAGE LINE R763 E201 0.33 CN202 SYNC CD REQ CT.GND +B(10V) D.GND SCLK DATA DECK REQ R236 V.GND To DVD CHANGER(SL-DV250) & TAPE Rch IN CASSETTE DECK(RS-DV250) R235 TAPE Lch IN R234 RS A.GND...
  • Page 33 M5218AP 2SD2137PQTA BU4053BCFE2 16PIN C2BBGF000251 100PIN M62457AFPE1 16PIN C2HBZC000010 80PIN NJU7313AMT2 30PIN C2HBZC000008 100PIN . . . C2BBFD000246 42PIN ... . NJM4558MTE1 8PIN ..
  • Page 34 SUBWOOFER To DVD CHANGER& To TUNER/ (EXT) (AUX) CASSETTE DECK AMPLIFIER MAIN P.C.B. FW602A FW601A 1 ..8 1 ... 13 1 ..8 1 .
  • Page 36 CN202 SYNC CD REQ CT.GND +B(10V) D.GND Q602 SCLK INTERFACE Q603, DATA INTERFACE DECK To DVD CHANGER (SL-DV250) V.GND &CASSETTE DECK (RS-DV250) TAPE Rch IN BLOCK DIAGRAM TAPE Lch IN A.GND TAPE Rch OUT TAPE Lch OUT CD Rch IN NJM4558MTE1 NJM4558MTE1 IC282...
  • Page 37 NJU7313AMT2 IC201 SIGNAL SELECTOR (29) (28) (27) (25) (26) NJM4558MTE1 (AUX) IC202 BU4053BCFE2 (24) (22) BUFFER IC203 SIGNAL SELECTOR (23) (EXT) (20) (21) (19) LEVEL SHIFT LATCH CIRCUIT SHIFT REGISTER SW CONT. DATA X601 S614 KEY SWITCH (4MHz) (MULTI (S601~613) JOG) C2BBGF000251 IC601...
  • Page 38 C2HBZC000010 IC801 DIGITAL SIGNAL PROCESSOR LIN4 (69) (RIN4) LIN3 (70) MICU I/F AUDIO SERIAL INTERFACE (RIN3) TAPE LIN2 (71) (RIN2) VDA12 LIN1 DELAY RAM (72) (RIN1) (I/O INTERFACE) VRAL GNDX OUTL (80) (OUTR) VRAL (79) TST0 (VRAR) [CH1/2] [CH3] [CH4] TST1 VRAL VDAL...

  • Page 39: Digital Signal

    C2HBZC000008 IC802 DIGITAL SIGNAL PROCESSOR 79 78 82~85 TST0~3 SELF MICOM D-IN/OUT TIMING GENERATOR BOOT VRM1 DELAY RAM (4kword x 16bit) (AUDIO DIGITAL SIGNAL PROCESSOR) (MIC) MOUT GNDX VRM2 POLYGONAL LINE CANCELLATION INTER- GNDM DECIMATION POLATION FILTER FILTER RUNNING (26) GNDASL AVERAGE (GNDASR)
  • Page 40 CN201 TU LIC TUNER Lch/C R ch TUNER Rch M5218APC IC301 A.GND BUFFER Lch OUT Q301,305 R ch Rch OUT (Q302) Q303 MUT F MUTING NJM4558MTE1 (Q304) IC303 +B(10V) SUR L1 BUFFER SUR L NJM4558MTE1 R ch SUR R Q315 IC302 (2/2) (Q316)