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adding toslink to receiver
adding toslink to receiver
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Old 3rd February 2011, 04:25 PM   #1
mizzl3 is offline mizzl3
diyAudio Member
Join Date: Feb 2011
Default adding toslink to receiver


I have a DAV-HDZ235, more specifically for the receiver HCD-HDZ235. It works great but has no optical inputs and my new tv only has one output, optical toslink.

I started taking it apart and sure enough theres a place on the io-s-o printed wiring board for optical toslink. Heres a pic:


and heres the whole service manual pdf if needed:


Through limited various research it seems very feasible to solder in a new torx147L, which is what is used on the closest model to mine with optical input, the HCD-HDZ273. On that model the optical input is on the main board, so I couldn't just look at it and see whats different, because on my HDZ235 the optical input is on the io-s-o board.

Any help on things to consider for this mod would be greatly appreciated. I've read about the following things that might come into play:

providing 5v power

If it worked would I just use the tv/video setting that the analog RCA input is on to hear the sound?

Nick Mahl
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Old 4th February 2011, 01:58 AM   #2
dangus is offline dangus  Canada
diyAudio Member
Join Date: May 2004
Location: Vancouver Island
adding toslink to receiver
Firmware is the big question. It's quite possible that even if the Toslink receiver is installed, the firmware won't allow access to it. Unless, of course, it automatically overrides the analog input. Best not to drill any holes in the case until you can confirm this.

Is there a coax digital input you could use instead? If so, wire up the TORX as an outboard optical to coax converter. (From viewing the Sony support site, maybe not.) (It strikes me as completely brain-dead to produce a digital surround processor/amp that doesn't allow for external digital audio inputs. DVD isn't the only source of digital audio: cable and satellite tuner boxes, computers, Minidisc, DAT, Laserdisc, Blu-ray, HD-DVD, media players, game consoles. I won't say anything about the customers who buy such a system without considering the lack of inputs.)
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Old 7th August 2015, 02:50 AM   #3
astudillojr is offline astudillojr  Venezuela
diyAudio Member
Join Date: Aug 2015
Thumbs up let's give it a shoot

Hi sir, well first of all, which is the model of your tv?, some of them have the audio outs in the main board but not always for rca but for 3.5mm jack, like the headphones one. (samsung new led models are like these)

second, I was trying to download your service manual but the link doesn't work anymore... other important thing to consider is, for adding the toslink input, the receiver must have a digital reception circuit, in order to transform the signal and make it pass to the amplification circuit and then to the outlines. I hope your circuit has it.
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