Luxman D-113
A compact disc player known mostly from its service documentation. You learn about this one from the repair manual, not the marketing.
Overview
What survives of the Luxman D-113 is mostly paperwork: a service manual and a parts list. Those tell you how the machine was put together, but not how it sounded or what it cost. The D-113 appears in Luxman's own literature as one of the CD players that could feed the LV-117 integrated amplifier through its digital direct inputs. Those were optical and co-axial links that Luxman described as a company first. The manual groups it with the D-117 and D-109 as source components compatible with that direct digital connection. That puts the D-113 in the same late-'80s Luxman digital family, but it doesn't say where it sat in the lineup.
The service documentation is quite specific about the transport. The adjustment procedures call for a VCO trim set to 4.3218 MHz ±10 kHz, a focus bias adjustment made by peaking an oscilloscope waveform, and a tracking error balance trimmed to 0 ±50 mV. Tracking and focus gain are adjusted with a 1 kHz, 200 mV oscillator feeding a valve voltmeter. So a laser-based optical pickup gets aligned by hand. The D-113 uses a real CD mechanism, and the manual assumes someone with a scope and a steady hand will be keeping it alive decades later. The parts list confirms an optical pickup head among the assemblies, along with a loading motor assembly, a fluorescent display, and a remote-control unit designated the RD-113.
Other details show up in the parts breakdown: a 315 mA, 250 V fuse, a top cover, front frame assemblies, ten-key and logic knobs on the front panel, and a small forest of tactile switches. The packing list names the accessories that shipped in the box - an owner's manual, an output plug, a mini plug cord, the RD-113 remote, and a UM-4MC battery to power it. The records don't give the DAC, the price, or the year.
Notes on Documentation
Anyone chasing a D-113 should know what the record does and doesn't contain. The model is confirmed as a Luxman CD player by the company's own LV-117 literature and its service manual. The manual's adjustment tables and parts lists are detailed enough to support restoration. What's missing is nearly everything a buyer would want first: production years, original price, converter type, output configuration, dimensions, weight, and any contemporary review coverage. Period coverage exists but is limited. A December 1988 High-Fidelity item (p.81) discusses vibration-sensitive equipment such as CD players in the context of isolation accessories. An April 1989 Audio listing (p.146) shows dealers advertising CD-player accessories of the era. Neither gives D-113-specific specifications or pricing. The same December 1988 High-Fidelity issue (p.81) also notes the LaSalle Quartet's announced retirement from professional activity, alongside its coverage of contemporary chamber music recordings. Treat the spec sheet as effectively blank and judge the individual unit - laser condition, capacitor age, and display function - on inspection.
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