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JM Electronics
Good quality service manual German user manual. German user manual This is a quality scan of a manual in excellent condition and is just as good as having the original manual in hand
The manual for Sony LBT-D505 component stereo system is was excellent , with schematics, parts layout and parts list as well as instructions for adjustments for each component. Print was clear even when enlarged.
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Text excerpt from page 8 (click to view)
Filter Block Since the sound signal from the CPU is a stepped waveform, the filter block is added to smooth the waveform.
CPU MSM6567-15
To mute circuit
Mute Circuit The mute circuit removes noise from the sound signal just before the signal fades away. The circuit detects amplitude of the decaying sound signal by amplifing it by 1000 times, and transistor T6 flows the signal into the ground when the amplitude decays almost zero. +0.5V at the minimum amplitude (no sound) -2.7V at the maximum amplitude Sound signal from filter block
