Even a schematic of the area of the optical pickup from the JVC service
manual for the XL-FZ158BK would be helpful. That would at least identify
the pinout of the hologram laser IC.

Thanks.

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Sam Goldwasser writes:

(Part of this was posted Yesterday to sci.electronics.repair only.)

I'm looking for a datasheet with as much detail as possible on the
optical pickup in the JVC XL-FZ158BK. It's either from Philips or
Sony. The type of pickup is called a "hologram laser" by some
manufacturers as it uses a Holographic Optical Element (HOE) to produce
the 3 beams of the "three beam pickup" and to distribute the return
beams to the focusing and tracking photodiodes. It has 10 pins in a
flat package with the hologram part in the clear cover. What I'm
mainly interested in are the details of the optical arrangement to identify
the photodiode locations. While conventional optical pickups using
discrete optics generally have a separate PD array with easily identified
individual photodiodes, these hologram lasers may have the photodiodes
distributed in almost any pattern. And on this one, it's far from obvous
even where they are, let alone the specific function of each.

It has a normal edge-emitting laser diode with its beam reflected by a
really tiny prism. But I can't visually identify either the monitor
photodiode, or the phodiiodes of the focusing/tracking/RF signal PD array.

Here is a poor photo:

http://repairfaq.cis.upenn.edu/Misc/...oto-diodes.jpg

13,14,15,16 are pads for the laser diode.

B is the angled mirror face.

A is the flat top of the prism. It is not known what, if anything,
is below this.

Pointers to any Philips or Sony combined laser/photodiode array optical
pickup datasheets would be desirable if this specific one doesn't ring
a bell.

Any info appreciated.

Thanks!

--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/