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Technics SA-DA8

AV Control Stereo Receiver (2000)

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Technics SA-DA8


Tuning range: FM, MW

Power output: 100 watts per channel into 6Ω (stereo)

Surround output: 100W (front), 100W (center), 100W (rear)

Frequency response: 10Hz to 70kHz

Total harmonic distortion: 1%

Input sensitivity: 3mV (MM), 200mV (line)

Signal to noise ratio: 80dB (MM), 100dB (line)

Channel separation: 55dB (line)

Output: 200mV (line)

Speaker load impedance: 4Ω to 16Ω

Digital inputs: coaxial, optical

Video Connections: composite, SVHS

Dimensions: 430 x 180 x 370mm

Weight: 11.7kg

Accessories: remote control


instruction/owners manual   English - abyser

schematics   English - jcgonsales

instruction/owners manual (alt scan)  English - Hi-FiDelity

instruction/owners manual   Francais - Hi-FiDelity

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re: SA-DA8

I'm getting an "F70" error message soon after switching on the receiver. The only way to reset it is cycling power, but the message keeps appearing.
The user manual is vague in this regard. It only says:

“F70” appears on the display: Turn off the unit and then turn it on again, or disconnect the AC mains lead and then connect it to your household mains socket
(If “F70” remains on the display, consult an authorized service center or your dealer.)

Do anybody know what the reason for this message may be? it doesn't seem to mean "overload". There is a separate message for this. I suspect that it's related to some malfunction in one of the several microcontrollers inside, but I'm clueless on which one may be affected.

re: SA-DA8

Something has caused the internal control bus to malfunction!

It could be a blown fuse and thus a lack of power to one section but it is more likely to be a large number of cold solder joints on the main board. Be certain to check solder joints in the fan control circuit, board to board interface plugs (on both sides, main board and daughter cards!) and everything mounted to the central heatsink. Bad solder joints are very common at the hybrid ICs and voltage regulators.

If the solder is good and you blow one of the 8A fuses, you've got a bad output module or a power supply failure. Bad output modules are fairly uncommon as they're MOS devices and not subject to secondary breakdown. Solder joints on these units are terrible however, as they are on most Technics receivers made from the mid 1990s to 2000s.

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