Technics SH-DV290EG User manual

ORDERNO.AD0303068C8
Sound Processor
SH-DV290EG
Colour
(S)...................SilverType
System:SC-DV290
Because ofuniqueinterconnecting cables,whena
componentrequires servise,send orbring intheentire
system.
Note:Refertotheservice manual forModel No.
SA-DV290E/EG/EB(ORDERNO.AD0303067C2) for
information on “ACCESSORIES”and “PACKAGING”.
SPECIFICATIONS
Specification
1

EQ/SFPsection
MANUAL GEQ
5-Band EQ
Centerfrequency 70/300/1k/3.15 k/10 kHz
Level control ±2.0, 4.0, 6.0dB
EQ/Space mode
4modes HEAVY, CLEAR, SOFT, HALL
SUPER3DAI EQ
3modes AI EQ, SUPER3DAI 1, SUPER3DAI 2
Pre-amplifiersection
Inputsensitivity/impedance
VCR (EXT) 250 mV/15 k
VDP(AUX) 250 mV/15 k
Outputlevel
VCR RECOUT 150 mV/1.5k
DOLBYPROLOGICsection
PROLOGICmode SURROUND
CENTERmode NORMAL
DELAYTIME 20 ms (Fixed)
AVSURROUND section
AVsurround mode
SUPERSURROUND (MUSIC, MOVIE)
DSPCONTROL section
DSPcontrol mode SUPERSOUND EQ
CENTERFOCUS
VIRTUAL REARSURROUND
MULTI REARSURROUND
SEATPOSITION
Spectrumanalyzersection
Displaymode NORMAL, PEAKHOLD, AURORA
General
Dimensions(W×H×D) 293×89×270 mm
Mass 1.5kg
PowerSupply DC±10V/ -25V, AC4.6V
PowerConsumption 7W
Nots 1.Design and specificationsaresubjectto
changewithoutnotice.
2.Dimensionsand weightareapproximate.
3.Total harmonicdistortion ismeasured bythe
digital spectrumanalyzer.
System/SC-DV290
Sound processor:SH-DV290, DVD/ Video CD/ CD
changer:SL-DV290, Tuner/ Amplifier:SA-DV290 ,
CassetteDeck:RS-DV290, Speakers:Front*(SB-
DV290),Center* (SB-PC95),Surround*(SB-PS95)
(*Madein MAES.)
Manufactured underlicense fromDolbyLaboratories. /
“Dolby”,”Pro Logic”and thedouble-Dsymbol are
trademarks ofDolbyLaboratories.
2

1. BeforeRepair
Thisequipment(SH-DV290), whichisthecomponentofthesystem, issuppliedwithpowerfrom
theamplifier(SA-DV290).Whenrepairing thisequipmentor checking operation ofthesystem, be
suretoconnecttheamplifierwithit.
Powersupplyand operation check inthestateofitas asingleequipmenetareimpracticable.
2. Operating Instructions
3. Operation Checks and Component Replacement
Procedures
-Thissection describes procedures forchecking theoperation of
themajorprintedcircuitboardsand replacing themain
components.
-Forreassemblyafteroperation checks orreplacement, reverse the
respectiveprocedures. Special reassemblyprocedures are
describedonlywhenrequired.
3.1. Checking fortheFL P.C.B.
3

-Check theFL P.C.B. as shownbelow.
3.2. Checking forthemainP.C.B.
-Follow the(Step1) -(Step3) ofitem3.1.
4

-Check themainP.C.B. as shownbelow.
5

4. Wiring Connection Diagram
5. Block Diagram
6. ToSupplyPowerSource
Thisunitisdesignedtooperateon powersuppliedfrom system connected.
Whenacomponentrequires service, use thesystem connectionstosupplypowersource.
For system connections. (RefertoFig. 1)
Fig. 1
7. SchematicDiagramNotes
7.1. TypeIllustrationsofIC’s, Transistorsand Diodes
7.2. SchematicDiagramNotes
-Thisschematicdiagrammaybemodifiedat anytimewith
developmentofnew technology.
Notes:
6

-S601:Displaymode(DISPLAYMODE)switch.
-S602:DOLBYPRO LOGIC( PRO LOGIC, OFF/ ON)switch.
-S603:Supersurround (SUPERSURROUND)switch.
-S604:Supersound EQ (SUPERSOUND EQ)switch.
-S605:Centerfocus(CENTERFOCUS)switch.
-S606:Virtual rearsurround (VIRTUALREARSURROUND)switch.
-S607:Multi rearsurround (MULTI REARSURROUND)switch.
-S608:Jog control ( )switch.
-S609:Jog control ( )switch.
-S610:Jog control ( )switch.
-S611:Jog control ( )switch.
-S612:Super3DAI EQ (SUPER3DAI EQ)switch.
-S613:Seat position (SEATPOSITION)switch.
-S614:Joystick (MULTI JOG)switch.
-Indicatedvoltagevalues arethestandardvalues fortheunit
measuredbytheDC electroniccircuittester(high-impedance) with
thechassistakenas standard. Therefore, theremayexist some
errorsinthevoltagevalues, depending on theinternalimpedanceof
theDC circuittester. /
Nomark:Poweron
Importantsafetynotice:
Componentsidentifiedbymarkhave special characteristics impotantfor safety.
Furthermore, special partswhichhave purpose offire-retardant(resistors), high-qualitysound
(capacitors), low-noise (resistors), etc. areused. Whenreplacing anyofcomponents, besureto
use onlymanufacture’sspecifiedpartsshowninthepartslist.
Caution!
-ICand LSI aresensitivetostaticelectricity.
-Secondarytroublecanbepreventedbytaking careduring repair.
-Covertheparts boxes madeofplastics withaluminumfoil.
-Ground thesoldering iron.
-Putaconductivemat on theworktable.
-DonottouchthelegsofICorLSI withthefingersdirectly.
Voltageand signal line
7

:Positive voltageline
:CD Playback signal line
:Negative voltageline
8. SchematicDiagram
9. Printed Circuit BoardDiagram
10. Terminal Function of IC's
10.1. IC601(C2BBGF000425):Systemcontrol/FL drive
Pin
No. Mark I/O/ Division Function
1KEY1 I Operation key1 signal input
terminal
2KEY2 I Operation key2 signal input
terminal
3SP IN I A/Dsignal inputterminal
from IC602
4SP A O Band selectsignal output
terminal for IC602
5SP B O Band selectsignal output
terminal for IC602
6SP C O Band selectsignal output
terminal for IC602
7SACS I Chipselectsignal input
terminal
8DSP RST O Resetsignal outputterminal
for IC401
9DSP CS O Chipselectsignal output
terminal for IC401
10 DSP SNS I Sense signal inputterminal
from IC401
11 DSP
ACK IAcknowledgesignal input terminal from IC401
12 DSP CK O Clock signal outputterminal
for IC401
8

Pin
No. Mark I/O/ Division Function
13 DSP DO O Datasignal outputterminal
for IC401
14 DSP DI I Datasignal inputterminal
for IC401
15 JOGA I JOG Asignal inputterminal
16 JOGB I JOG Bsignal inputterminal
17 CNVSS I ConnectedtoGND through
resistor
18 RESET I System resetsignal input
terminal
19 NC - Notused, open
20 NC - Notused, open
21 VSS - GND terminal
22 XIN I Ceramicoscillator input
terminal (f=4MHz)
23 XOUT O Ceramicoscillator output
terminal (f=4MHz)
24 VCC I Powersupplyinputterminal
25 NC - Notused, open
26 NC - Notused, open
27 LEDCFO O ORANGE LED(CENTER
FOCUS)signal output
terminal
28 LEDCFG O GREENLED(CENTER
FOCUS)signal output
terminal
29 BR93
DATA IDatasignal inputterminal from EEPROM
30 BR93 CS - Notused, open
31 BR93 CK - Notused, open
32 SYNC I Powerfailuredetectsignal
inputterminal
33 SAREQ O Requestsignal output
terminal for Tuner/Amplifier
34 SACK O Serial communication
signal outputterminal for
Tuner/Amplifier
35 SADO O Serial communication
signal outputterminal for
Tuner/Amplifier
36 SADI I Serial communication
signal inputterminal from
Tuner/Amplifier
9

Pin
No. Mark I/O/ Division Function
37 LEDSSS O LED(SUPER
SURROUND)signal output
terminal
38 LEDDPL O LED(DOLBYPROLOGIC)
signal outputterminal
39 LED
SPO O ORANGE LED(SEAT POSITION) signal output
terminal
40 LEDSPG O GREENLED(SEAT
POSITION) signal output
terminal
41 LED3DO O ORANGE LED(3D
ENHANCEDSURROUND)
signal outputterminal
42 LED3DG O GREENLED(3D
ENHANCEDSURROUND)
signal outputterminal
43 LED
MRO OORANGE LED(MULTIREAR SURROUND) signal output
terminal
44 LED
MRG OGREENLED(MULTIREAR SURROUND) signal output
terminal
45 LED
VRO OORANGE LED(VIRTUAL REARSURROUND) signal
outputterminal
46 LED
VRG OGREENLED(VIRTUAL REARSURROUND) signal
outputterminal
47-
80 P1-P34 O Segmentsignal output terminal
81 --- - Notused, open
82-
88 7G-1G O Gridsignal outputterminal
89 VEE I Powersupplyinputterminal
90 CD&
DECK DI I Datasignal inputterminal (DVDand deck machanism)
91 CD&
DECK
DO
O Datasignal outputterminal
(DVDand deck machanism)
92 CD&
DECK
CK
I Clock signal inputterminal
(DVDand deck machanism)
93 NC - Notused, open
10