Tehkan Phoenix Restoration

Background

This game is the very first game I bought and initiated my interest in video arcade games. I spotted the game at a car boot sale on the outskirts of Ipswich in the mid 1990's. At the time I used to regularly hit the car boot sales in search of old home computers and had acquired a collection of those over the prior few years but this was the first time I'd even realized that old video arcade games were still around. Further, this particular edition was the exact type I'd played growing up and was one of my all-time favorites. I bought the game for around 60 UKP.

At the time I only had red E-reg Nissan Bluebird hatchback and thus no way to transport it but the Bluebird did have a tow bar. I borrowed a friends motorcycle trailer and strapped it onto the back of that get it to Yorkshire from Ipswich.

In the bottom of the cabinet was some paperwork that identified the cabinet as Tehkan Phoenix likely imported by Ruffler & Deith into the UK circa 10th February 1981:

Tehkan Phoenix Dip Switches

It was wholly original and working fine but had seen a lot of play in its life. The original Japanese monitor lost its LOPT and I ended up refitting a standard Hantarex MTC-900 instead of that. From then on it'd been working without issue until it was stored when I moved to the US and it finally joined me in the US as part of The Big Move.

24/06/2012 - Post "The Big Move" power on

Tehkan Phoenix

It's physical condition was pretty good after 10 years of storage and a trip around the world. The game is dedicated 240V so it would stay on that like many of the Europe targeted games.

Neck board replacement Replacement Hantarex MTC-900 chassis

Power on was not a big success. There was arcing from the monitor at the focus pot to deal with first. Swapping over the entire neck board with one from a scrap chassis had no effect. I suspected LOPT or focus bleeder failure. The particular flavour of chassis in this game was somewhat unusual in that it didn't have the usual MTC-900 "brick" LOPT but a more modern styled rounded LOPT. Suggestions in the VAC community have been that this chassis is the MTC-900A. Unlike the common 900, the LOPT on this does not allow the HV lead/bleeder to be easily changed so I decided to change the LOPT. After I'd removed it, however, it was clear that a standard 900 LOPT has a different pin configuration and wouldn't fit in this chassis :( I decided to abandon this chassis and swap it out for a common MTC-900 chassis.

15/07/2012 - Power on #2

Tehkan Phoenix power on
Tehkan Phoenix power on Phoenix board, no boot

With the replacement chassis fitted power on yielded a reasonable picture but no sign of booting from the game PCB. After a few minutes there was a and acrid stench of capacitor electrolyte coming from the chassis :(

24/07/2012 - Monitor chassis repair

Leaking power supply capacitor Leaking capacitor removed

The failed capacitor was clearly identifiable - it was the main DC power regulation capacitor that was leaking electrolyte out of one side. I fitted a suitable replacement.

28/07/2012 - Game board repair

Phoenix game PCB on the bench

The original board had issues on the bench so before spending time on that I went through a box of spare sets to see if I had something closer to working.

Volume pot repair

I found a nice original Taito version of the board that appeared to be working except for a broken volume pot. I sourced a replacement from Bob Roberts that got the Taito game PCB completely working.

29/07/2012 - All fixed

Phoenix all fixed

Refitting the monitor chassis and replacement game PCB back in the cabinet yielded a complete working game, the first of my UK games and one that I'd be gasping for a game of for a long time :)

01/06/2015 - Northwest Pinball & Arcade Show

This game had been in the show the last few years and had been running fine. During pre-show testing this year, however, the monitor lost sync briefly and there was a loud crack followed by nothing. The game played blind but the monitor was dead. There wasn't enough time to fix it before the show so the game ended up sitting this one out :(

28/06/2015 - Monitor chassis repair

Hantarex MTC-900 chassis Replacement TDA2593

Looking at the chassis on the bench, the main power and bootstrap 12V both looked OK. As far as I could tell, the TDA2539 was idle. Replacing the TDA2593 brought the chassis to life and it ran fine for a few hours on the bench.

Hantarex MTC-900 chassis

Putting the chassis back in the cabinet, power on yielded a picture for about five seconds before another loud crack and another dead chassis :(. I suspected the problem was that the HV cup was leaking slightly and arcing across to the chassis, killing it. There was only about half an inch between the HV cup and the chassis due to the CRT orientation. The proposed fix was to rotate the picture tube and flip the yoke connections to match so that the HV cup was on the opposite side away from the chassis.

18/07/2015 - Monitor disassembly

Monitor bezel & control panel removed Monitor bezel on the bench

The monitor bezel and control panel are assembled into a single unit on this cabinet. The control panel/bezel combination is attached with clips accessible from the coin door. When unclipped the whole assembly slides forward an inch or so to allow the top of the bezel to slide out from underneath the back of the cabinet and then the whole assembly lifts out. It's a little awkward because the bezel is Perspex and the control panel heavy steel so there is a risk of splitting the bezel if the control panel isn't supported (the one on this cabinet was already cracked). The control panel wiring unplugs from the main cabinet.

Joystick assembly Button assembly Control panel, stripped
Control panel wiring loom Controls removed Bezel removed

Since I was removing the control panel anyway I decided to do a little bit of restoration work on it. The control panel metal plate was rusting and since the bezel rests directly on it the bezel artwork was starting to wear. The plan was to strip down the control panel and respray it. Some minor repairs were also needed on the joystick to replace a micro switch.

Monitor Monitor surround removed Monitor surround

As can be seen from the pictures of the screen burn, the replacement monitor had seen a lot of use running Gun Smoke. The burn is not too noticeable behind the smoked Plexiglas. The monitor surround is a simple cardboard cut-out in two pieces taped together and taped to the CRT.

CRT removed CRT on the bench

The monitor chassis was already out leaving only the four corner screws to remove to release the CRT.

Invert picture Normal picture CRT refitted

In order to flip the picture to be the right way round both the horizontal and vertical yoke wires needed to be crossed. With that done the CRT could be refitted back into the frame.

Monitor chassis refitted Running OK

Refitting the chassis, reconnecting everything (with the HV cup now on the far side away from the chassis) and powering on yielded no issues. The game ran fine this time.

21/07/2015 - Artwork scanning

Tehkan Phoenix monitor glass scan - top left Tehkan Phoenix monitor glass scan - top right
Tehkan Phoenix monitor glass scan - bottom left Tehkan Phoenix monitor glass scan - bottom right
Tehkan Phoenix instruction card scan

Scanned in the Tehkan Phoenix monitor glass.
300 DPI Tehkan Phoenix monitor glass scan (36.7MB).

01/08/2015 - Joystick repair

Joystick Joystick repaired

The joystick had a large micro switch hacked into it where there should have been a small lever switch. In a stroke of luck I found some of the right type of switch reclaimed from something that I could use to restore it back to original.

Fire button Fire button disassembled

I also inspected the fire button that was very loose. At first I thought that the button was the wrong type for the holder since the rim & shaft seemed far too small for the socket but on comparing with the other buttons it looked like this button was just very very worn, to such a degree that the socket & button now had a large gap between them. I thought about replacing it but decided to clean it an leave it as is as a testimony to how much play this game has seen in its life.

02/08/2015 - Control panel respray

Control panel assembly

The control panel itself comprises the large flat panel for the controls and a stainless steel trim piece & wood strip spacer bolted to it with a couple of bolts.

Sanded ready for paint Control panel painted

After sanding to remove the surface rust I sprayed the panel with a primer coat. The control panel clips on the back I masked off with masking tape. Since the control panel was fully covered by the monitor bezel & trim piece no top coat was needed and the gray was a reasonable approximation for the prior galvanized colour.

15/08/2015 - Monitor surround repair

Monitor surround Monitor surround, repaired Velcro & double-sided tape

Previously the monitor surround had been joined with tape and taped to the CRT. The old tape I removed and then cleaned & flattened the surround for a few days before patching the surround with cardboard & paper glue to make a permanent long lasting join. To attach the surround to the CRT I used Velcro secured to the CRT & surround with double sided foam tape. This would allow the surround to be removed in future without tearing it up again. Since the foam tape was white I used a Sharpie to blacken the edges so that they wouldn't be visible under the smoked Plexiglas.

15/08/2015 - Smoked Plexiglas

Smoked Plexiglas drilled Smoked Plexiglas screwed Smoked Plexiglas screw covered

The smoked Plexiglas was not attached to anything and simply sat in the frame. The problem with this that I've seen before in other cabinets is that when the cabinet is moved the Plexiglas tends to slide around, scratching itself and the bezel and sometimes sliding out of place entirely. The fix for this design error is a couple of screws that hold the bezel in place, covered over to protect the bezel on top.

15/08/2015 - Control panel reassembly

Control panel reassembled

I reassembled the control panel and refitted it back onto the bezel ready to fit back on the cabinet.

15/08/2015 - All done

Tehkan Phoenix upright

After putting it all back together the game was ready for show time once again.




prswan@gmail.com