DATA Power Supply (Dragon's Lair)

sshaft

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Recently purchased a Piece-Mailed Dragon's Lair...
Found most of the components and fired it up to no avail...The Flourescent light lit up and the cooling fan powered up. The speakers gave a loud hum and that was it..(No LED scoreboard/No playing of the Disc).

Under closer examination i noticed a resistor was blown on the power board(DATA)
(see image "resistor" R-7 is blown)

Question 1:
"What effect would the blown resistor have on the powering of the game? Could this stop the main board from starting the laserdisc player thus the game???(both monitor/disc and laserplayer are functional...I booted the player w. paper clips)

Question 2:
"Is it possible to blow an EMI FILTER??? mine "popped" and released a slight burn smell..?"

Question 3:
Would a 1981 DATA power work in place of the 1983 version???(see attached)


thanks
 

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Last edited:
Under closer examination i noticed a resistor was blown on the power board(DATA)
(see image "resistor" R-7 is blown)

It would appear from your pic, that more than just R7 is blown. It looks like to me that the 723 regulator blew and smoked R24? R7 is disconnected without a doubt, but doesn't look bad.

Question 1:
"What effect would the blown resistor have on the powering of the game?

In most cases very little effect. R7 is in the "Spot Kill" circuit, and will probably not allow the game to come up.

Could this stop the main board from starting the laserdisc player thus the game???

Yes

(both monitor/disc and laserplayer are functional...I booted the player w. paper clips)

Question 2:
"Is it possible to blow an EMI FILTER???

Yes

mine "popped" and released a slight burn smell..?"

It can probably be removed without any problems after the power supply has been repaired.

Question 3:
Would a 1981 DATA power work in place of the 1983 version???(see attached)

It appears that there were 3 different power supplies used, and I don't see anything saying that it won't work. I would still check the scat to make sure that all of the voltages match up correctly with the pinout.

thanks

See above red text.
 
Ended up i blew the Power Line Filter(was a stock AEROVOX A0gen2d21)....
replaced it w. a CORCOM #3eea1)...

Also replaced the Motorola 723 regulator and a couple of the resistors...

Plugged everything back in fired it up and bam...

Worked like a charm..

Nothing more exciting then firing back up for the first time..kinda like mechanical cpr.


thanks for the help

Now working through the various rom versions that are avail to utilize more of the scenes on the disk that weren't programmed into the original game.
 
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