Technics SA-DV290EE, SA-DV290GN Service Manual
ORDER NO. AD0305100C8
Tuner/ Amplifier
SA-DV290EE / SA-DV290GN
Colour
(S).......................Silver Type
System: SC-DV290
Because of unique interconnecting cables, when a
compact requires service, send or bring in the entire
system.
SPECIFICATIONS
Specification
1
Amplifier section
Power output (L/R both channel driven)
Stereo Mode
DIN
1 kHz THD 1%/6 (High)
100 Hz THD 1%/8 (Low)
RMS
1 kHz THD 10%/6 (High)
100 Hz THD 10%/8 (Low)
PRO LOGIC mode
DIN FRONT
1 kHz THD 1%/6 (High)
100 Hz THD 1%/8 (Low)
SURROUND 1 kHz THD 1%/8
CENTER 1 kHz THD 1%/8
RMS FRONT
1 kHz THD 10%/6 (High)
100 Hz THD 10%/8 (Low)
SURROUND 1 kHz THD 10%/8
CENTER 1 kHz THD 10%/8
PMPO 1 kHz/High 6 , Low 8 ,
CENT. 8 , SURR. 8
Total harmonic distortion
Rated power at 1 kHz
Half power at 1 kHz
Load impedance
FRONT (High)
FRONT (Low)
SURROUND
CENTER
DIGITAL S. WOOFER
Center frequency 60 Hz
LEVEL (VOL -20 db) MID +3 db
FM tuner section
Frequency range 87.50—108.00 MHz
(0.05 MHz steps)
Sensitivity
S/N 26 db
S/N
MONO 70 db (75 db, IHF)
Antenna terminal(s)
AM tuner section
Frequency range 522—1629 kHz (9 kHz steps)
Sensitivity (S/N 20 db)
Timer section
Clock Quartz-lock type
Function Play timer (1 time, daily),
1.8 V (IHF usable)
75 (unbalanced)
520—1630 (10 kHz steps)
2×25 W
2×45 W
2×35 W
2×65 W
2×25 W
2×45 W
2×30 W
60 W
2×35 W
2×65 W
2×40 W
80 W
3000 W
1% (6 )
0.1% (6 )
6
8
8
8
MAX +6 db
1.5 V
500 V/m
2
Function
Play
timer
(1 time,
daily),
Rec timer (1 time, daily)
Sleep (120 min, 30 min intervals)
Setting intervals (Play/Rec) 1 minute—23 hours 59 minutes
(1 min intervals)
General
Power supply
(For (GN) area) AC 230—240V 50Hz
(For (EE) area) AC 230V 50Hz
Power consumption 230 W
Standby 0.5 W
Dimensions (W×H×D) 293×118.5×345 mm
Mass 5.3 kg
Nots 1.Design and specifications are subject to
change without notice.
2.Dimensions and weight are approximate.
3.Total harmonic distortion is measured by the
digital spectrum analyzer.
System/SC-DV290
Sound processor: SH-DV290, DVD/ Video CD/ CD
changer: SL-DV290, Tuner/ Amplifier: SA-DV290 ,
Cassette Deck: RS-DV290, Speakers: Front* (SBDV290),Center* (SB-PC95),Surround* (SB-PS95)
(*Madein MESA.)
1. Accessories
- AC mains lead for (EE) areas
(RJA0019-2X)....................1 pc.
- AC mains lead for (GN) area
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(RJA0035-2X)....................1 pc.
- Remote control for (EE) area
(EUR7702290)....................1 pc.
- Remote control for (GN) area
(EUR7702300)....................1 pc.
- Remote control batteries
(R6/LR6,”AA”,UM-3)....................1 pc.
Note: These are available on sales route.
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- FM indoor antenna for (EE) area
(N1EAYY000002)....................1 pc.
- FM indoor antenna for (GN) area
(N1EAYY000001)....................1 pc.
- AM loop antenna set
(N1DAEYA00008)....................1 pc.
- Speaker leads
(REE1234-1)....................2 pc.
(Red/Black)
(REE1233-1)....................2 pc.
(Gray/Blue)
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- Video cord
(K2JA2A000018)....................1 pc.
- RCAJ adaptor for (EE) area
(K1JZ24D00002)....................1 pc.
2. Before Repair and Adjustment
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 by 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
supplyvoltage230 V/240 V.
Areas (EE) (GN)
Power supply voltage AC 230V AC 230-240V
Consumed current 50 Hz 130-380 mA 50 Hz 130-380 mA
3. About the Protection Circuitry
The protection circuitry may have operated if either of the following conditions is noticed:
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*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 impedande less
than the indicated rated impedance of thisunitareused.
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:
When the protection circuitry functions, the unit will not operate unless the STANDBY /ON
button is first switched STANDBY and then ON again.
4. Operating Instructions
5. Operation Checks and Component Replacement
Procedures
- This section describes procedures for checking the operation of
the major printed circuit boards and replacing the main
components.
- For reassembly after operation checks or replacement, reverse the
respective procedures. Special reassembly procedures are
described only when required.
5.1. Checking for the AC IN P.C.B.
- Check the AC IN P.C.B. as shown below.
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5.2. Checking for the operation P.C.B.
- Follow the (Step 1) - (Step 3) of item 5.1.
- Check the operation P.C.B. as shown below.
5.3. Checking for the main P.C.B.
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- Follow the (Step 1) - (Step 3) of item 5.1.
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- Check the main P.C.B. as shown below.
5.4. Replacement for the regulator transistor
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- Follow the (Step 1) - (Step 3) of item 5.1.
5.5. Replacement for the power IC
- Follow the (Step 1) - (Step 3) of item 5.1.
- Follow the (Step 1) - (Step 6) of item 5.2.
- Follow the (Step 1) - (Step 10) of item 5.3.
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6. Self-Diagnostic Function
This unit equipped with a self-diagnostic 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.
6.1. To display the malfunction code
U70 DVD: Automatically displays on the
U70 DECK:tuner/amplifier when a
malfunction occurs. Refer to
Fig. 6-1.
F61: Automatically displays on the
tuner/amplifier when a
malfunction occurs. Refer to
Fig. 6-1.
Fig. 6-1
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6.2. To return to the normal display
1. For U70 DVD/U70 DECK
- Press an any operation button on the tuner/amplifier.
- To re-display the code, switch the power off (POWER
STANDBY 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 redisplayed, and then after 3 seconds the clock will be displayed
and the power will automatically switch off.
6.3. Display contents
6.3.1. U70 DVD, U70 DECK / (displayed automatically)
- Problem or condition
A bus-line communications error has occurred as a result of the
flat cables being inserted incorrectly, thus preventing the system
from operating.
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- If U70 is displayed on the tuner/amplifier, the Cassette deck or DVD
Changer cannot be operated by remote control.
- Correction Procedure
1. To check for correct insertion of the flat cables.
- Insert each connectors until you hear a click.
- Insert the flat cables at the back of the unit in the order
indicated. Refer to Fig. 6-2.
Make sure the white side of the cables is on your right side.
Refer to Fig. 6-3.
Fig. 6-2.
Fig. 6-3.
2. Breakage of the flat cables. (Check and replace.)
3. If the problem is not corrected by items 1 and 2 above, this
indicates a faulty IC.
SA-DV290:
IC901 (C2BBFD000404)
SL-DV290:
IC401 (C2BBFD000402)
RS-DV290:
IC701 (M38503M2406F)
Check these ICs and replace.
6.3.2. F61
- Problem or condition
When the power switch is switched on, it automatically switches
back off, making it impossible to switch power on.
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- Correction procedure
Faulty Tuner/Amplifier (SA-DV290) output IC (IC601).
(When a DC voltage is applied to speaker terminals.)
7. To Supply Power Source
This unit SA-DV290 is designed to operate on power supplied form system connected.
For system connection, refer to Fig. 7-1.
Fig. 7-1.
When the unit SA-DV290 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. 7-2.)
2. Connect this unit to an AC power supply cord.
(This unit come to stand-by mode.)
3. Turn the unit ON.
Fig. 7-2.
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Notes:
Use only this method when checking the voltage etc..
In case of checking operations, use the system connections to supply power source.
8. Schematic Diagram Notes
8.1. Type Illustration of IC's, Transistors and Diodes
8.2. Schematic Diagram Notes
- This schematic diagram may be modified at any time with the
development of new technology.
Notes:
- S901: Power Standby/on ( ) switch.
- S902: Clock/timer (CLOCK/TIMER) switch.
- S903: Demo (-DEMO) switch.
- S904: Play timer/record timer ( PLAY/ REC) switch.
- S905: FM mode (FM AUTO/MONO) switch.
- S906: Tuning mode (TUNING MODE) switch.
- S907: Set (SET) switch.
- S908: Source input (INPUT SELECTOR) switch.
- S909: Echo (ECHO) switch. For [GN] area.
- S910: Tuning (TUNING, ) switch. For [EE] area.
S910: Tuning (TUNING, , ) switch. For [GN] area.
- S911: Tuning (TUNING, ) switch. For [EE] area.
S911: Tuning (TUNING, , ) switch. For [GN] area.
- S912: Tuner/band (TUNER/BAND) switch.
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- S913: Digital super woofer (DIGITAL S. WOOFER) switch.
- S914, 915: RDS display mode (RDS, PS-DISP, MODE-PTY) switches.
For [EE] area.
S914, 915: KARAOKE, Voice mute (KARAOKE, V.MUTE) switch.
For [GN] area.
- S916: Key control (KEY CON) switch. For [GN] area.
- S917: MIC effect (MIC EFFECT, LOUNGE) switch. For [GN] area.
- S918: MIC effect (MIC EFFECT, CHORUS) switch. For [GN] area.
- VR901: Main volume V.R..
- 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
internalimpedanceofthe DC circuit tester.
No mark: Power ON
- 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.
When replacing any of components, be sure to use only
manufacture's specified parts shown in the parts list.
Caution!
- Secondary trouble can be prevented by taking care during repair.
- IC and LSI are sensitive to static electricity.
- Cover the parts boxes made of plastics with aluminum foil.
- Ground the soldering iron.
- Put a conductive mat on the work table.
- Do not touch the legs of IC or LSI with the fingers directly.
- Voltage and signal lines
: Positive voltage line
: Negative voltage line
: Audio signal line
: Tuner signal line
: MIC signal line
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