Relamping a Marantz 2235B

Begin by mixing one large beverage of choice, my choice today is a very large 7 and 7.

Unplugging the unit, never work inside of a unit with the power hooked up.

Remove the 2 philips screws on each side of the unit. Carefully remove the cover.

Place all small parts in a dish or something so you will not drop them or somehow lose them.


There are two philips screws that hold the meter lamps in place and 2 philips screws that hold the dial and indicator lamps in place. You do not need to remove them, loosen them enough to be able to slide the housings back gently to gain access to the lamps.


The fuse lamps are 8v 200ma lamps, if one is bad it is advisable to replace them all. The indicator lamps are 8v 40ma pin type lamps that will require soldering to install them.


They will solder in from behind.


The meter lamps are also 8v 200 ma and should also be replaced with the dial lamps.

Replace the lamp holders after installing the new lamps, be sure to tighten the 4 screws.

I like to clean the inside of the face plate while I am doing this, dust and such does get behind the face plate and your unit will look much nicer if you take the time to clean this.


Remove the knobs and slide buton by firmly pulling them off. I usually soak these while I am removing the face plate. Remove the 4 5/16 bolts and soak these also.


Remove the brass retaining ring and the face plate is free to remove and clean. Be careful not to leave any streaks or lint while cleaning the face plate.

While in here there is marginal access to the pots and some switches, you can do some good here but there are better vantage points for switch and pot cleaning.


Carefully clean the inside of the dial area before reassembly.

Without smudging the glass reassemble the face plate in reverse of taking it apart.

Replace the cover, plug in the unit and check your handy work.



Here is a great source for lamps. Replacement lamp Guru

Jim

This post has been edited by Jim Eck on July 17, 2007 06:28 am

nice job Jim, she's a beauty.

Nice job! That's a sweet looking unit.

For us eager to learn - those gizmos that look like fuses are actually lamps? I can't say as I've ever seen them before.

No idea what a 7 and 7 is, but it must be pretty good, seeing that you had most of it while taking those shots.

Great, great post Jim. You gotta do it more often, so that, as Larry says, we can learn from you.

Jorge

I'm probably not the right guy to learn from, but I think more information on how to do is a good thing, we might think something is simple but a new member may find us while try to find something out.

I can teach cocktail drinking!
A 7 and 7 is a blended bourbon with 7 up (lemon lime soda), that was the third one.

Jim

A work of patience and skill. Congrats. Very nice work and very nice pix.
Tanx for sharing.
BTW, the receiver looks awesome.

Nice thread Jim. I'd like to add that on several Marantz models, the lamp housing has a white paper-like backing which reflects the light, giving the Marantz blue light off. If the backing has become darkened by age and use, You'll end up with a green result. The paper can be replaced with a piece of drafting vellum, or white baker's paper. Should result in the greenish display being returned to blue. I was also going to add that after the bulb replacement you describe, a second 7&7 is usually mandatory, because you're going to want to listen to some tunes. However, I noticed you were actually already on your third 7&7, so disregard my advice on this point. Nice job.

Thanks.

There are also little blue condoms availible to put on the lamps to enhance the blue for Marantz.

One other important thing is on the Stereo light Marantz insists that you use the 12v 40ma bi-pin lamps not any lesser values, there claim is that the lesser draws can damage the IC in the FM section Marantz makes this a big RED WARNING. The other function lamps can be either 6, 6.3v, or 8v 40ma bi-pins, they shoud be marked if not a service manual may be required.

Jim