DV-500K - NTSC/PAL Karaoke Combi
Korean manufacturer, Samsung is proposing to introduce a PAL/NTSC combi in the
UK, the first time this company has supported the product here. Samsung was
showing a couple of combi players at the last Berlin Funkausstellung but advised
us no PAL model was anticipated. Since then, obviously, matters have moved on.
However, the Samsung player will not be with us till 1993, not later in 1992 as
the DV-500K is already being promoted in Far Eastern territories, Samsung UK is
delaying introduction in order to offer full PAL capability. As presently
manufactured the DV-500K only offers NTSC replay or transcoded NTSC for replay
via a PAL TV. It will not play PAL discs.
the DV-500K looks very similar to the Pioneer
CLD-1450 but with the addition of a couple of microphone inputs and echo,
volume and balance controls on the front panel. Video specs are given of 425
lines of horizontal resolution with a 47dB s/n figure. For the audio there are
dual 18 bit 8x oversampling D/A converters giving a 95dB s/n ratio and a 96dB
dynamic range. Dimensions arc 420 x 132 x 410mm (w x h x d) and the weight
10kgs. Power consumption is given as 40 watts. A remote control is supplied
and full CAV functions are offered. Programming for up to 32 tracks is possible.
The preliminary spec sheet also provides an unusual additional statistic:
of the stuffing quantity. Apparently it is possibly to get 720 DV-500Ks into a
40ft-shipping container. Only a few people know that.
As well as its DV-500K product number the player also bears the legend ‘Video Orchestra’, and a reference to the machine's karaoke capabilities.
Dolby Digital Upgrade:
Circuit schematicThe transistor BC547 is used to buffer the AFM RF signal and the transistor BC557 is used for the MUTE function. The AFM RF signal is picked up in the laserdisc player before the two bandpass filters at 2.3 MHz and 2.8 MHz. These filters are found close to the FM demodulator and CX decoder circuit HA12127ANT. R1 and R2 are chosen so that a suitable threshold voltage is obtained. The MUTE signal is active high (significantly less than 5V in the DV500K). The RCA output jack should be mounted so that it is isolated from the rear panel (i.e. chassi ground). Be careful not to get any metal dust into the player when you drill the hole for the RCA (see also fig. 2). The DC part of the output voltage should be about 4.5V during play and 0V when the output is muted.
WARNING! Do not attempt to do this yourself unless you are absolutely sure what you are doing. You could seriously injure yourself or destroy your laserdisc player.