Technics SADV-250 Schematic

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Service Manual
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ORDER NO. AD0103076C2
Stereo tuner/ amplifier
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SA-DV250
(S).......................Silver Type
Areas
EB.......................Great Britain.
EG.......................Europe.
System: SC-DV250
Because of unique interconnecting cables, when a
compact requires service, send or bring in the entire
system.
Specification
•Amplifier Section (Low frequency side)
Power output
DIN 100Hz, THD 1%, 8Ω both channels driven:
RMS 100Hz, THD 10%, 8Ω both channels driven:
•Amplifier Section (High frequency side)
Power output
DIN 1kHz, THD 1%, 6Ω both channels driven:
RMS 1kHz, THD 10%, 6Ω both channels driven:
Power output (prologic mode)
DIN (front: high frequency) 1kHz, THD 1%, 6Ω both channels driven:
(front: low frequency) 100Hz, THD 1%, 8Ω both channels driven:
(surround) 1kHz, THD 1%, 8Ω both channels driven:
(center) 1kHz, THD 1%, 8Ω: 60W
RMS (front: high frequency) 1kHz, THD 10%, 6Ω both channels driven:
(front: low frequency) 100Hz, THD 10%, 8Ω both channels driven:
(surround) 1kHz, THD 10%, 8Ω both channels driven:
(center) 1kHz, THD 10%, 8Ω: 80W
Total harmonic distorition
Rated power at 1kHz/ 6Ω: 1%
Half power at 1kHz/ 6Ω: 0.1%
Load impedance
(high frequency): 6Ω
Front
(low frequency): 8Ω
Surround: 8Ω
Center: 8Ω
FM tuner section
Frequency range: 87.50-108.00MHz
Sensitivity (S/N 26dB): 1.5μV
S/N: MONO 70dB
Antenna terminals: 75Ω (unbalance)
AM tuner section
2x45W
2x65W
2x25W
2x35W
2x25W
2x45W
2x30W
2x35W
2x65W
2x40W
(0.05MHz steps)
(75dB, IHF)
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7.1 To display the malfunction code
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U70 DVD:
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.
Automatically displays on the
Fig. 7-1
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7.2 To return to the normal display
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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 re-displayed, and then after 3
seconds the clock will be displayed and the power will automatically switch off.
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7.3.1 U70 DVD, U70 DECK/(displayed automatically)
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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.
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Correction Procedure
1.To check for correct insertion of the flat cables.
n Insert each connectors until you hear a click.
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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 replace.)
3.If the problem is not corrected by items 1 and 2 above, this indicates a faulty IC.
SA-DV250:
IC901 (C2BBFD000317)
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SL-DV250:
IC401 (M38504E6227F)
RS-DV250:
IC701 (M38503M2406F)
Check these ICs and replace.
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