Guide lamp problems

[anothermineral]

I own a 207 purchased recently from the Keyboard Centre in Canada. I recently noticed that a block of guide lamps (basically the entire octave below middle C) are not functioning. I find it hard to believe that all the lights blew simultaneously. Has anyone experienced anything like this and if so what was the resolve? It seems to me that either the board controlling the guide lamps is hosed up or maybe the guide lamps are wired via a harness and maybe there's a short or a loose connection on the group in question.

On a separate note, does anyone know how to purchase the service manual for the CVPs?

Thanks,

Tony in NY

[jjm542]

Can't help with the guide lamp problem, but I've been trying to get a service manual for my new 900. Yamaha product support says (a) there is no manual for my piano yet (new model); (b) the new manuals are on CD-ROM; and (c) they will no longer sell them to owners, just licensed servicepeople. My dealer is going to try to get one for me when they're available, and that may be your best route too.

A thought about guide lamps - I've noticed that with some midi files, guide lamps in the lower parts of the keyboard don't light. Could there be a setting that just lights one channel, above the split point, or ??? There are so many options and I haven't learned them all yet - perhaps old hands could comment on this.

[cowpast]

Last November, I ordered and received a service manual for my CVP207. The manual is for both the 207 and 209 models. The price was about $35 plus shipping.
I can't remember whether I ordered it via the Service or Parts department. The receipt was from the Music Customer Service Division.
Try calling the Service dept at...(800) 854-1569

The part number is SM CVP207/CVP209


RANT....
A major disappointment if Yamaha has decided against selling the manuals and/or parts to owners. I think many of us are capable and willing to attempt minor repairs, especially after the warranty has expired. Why pay for a service tech to fix a minor problem with keys or a floppy drive if you can do it yourself.
I also think some of us like to have the manuals just to satisfy the curiosity factor. I know I do. Better yet when it can answer a question or save a few bucks.
I have obtained and used service manuals for my cars and many major appliances with no trouble.
If you own it you should be able to decide what you want to do with it and whether you do or don't do any of this, it's nice to have the choice.
Some of these hardheaded policy decisions sure can tick you off.
Phil

[ragvand]

When I turn on my 209 I notice that one of the first things the Clavinova does is quickly light up the guide lights from lowest to highest key. It looks like a power up internal test of some kind. When you turn on your 207 do all you guide lights light up starting from the lowest to highest key? This could help you diagnose the problem a bit more.

[anothermineral]

I first noticed several lights were not working while using the guide lamp functionality. I then did as you suggested and noticed that almost an entire octave of adjacent lights were inactive a both start-up and during use.

[cowpast]

There are 3 circuit boards that hold the Guide Lights (GLL, GLC and GLR). Each has it's own wiring harness and plug assembly. My guess is that your problem is with the GLC board or connector.
On the circuit board the lamps are "wired" in groups of 10. Each group of 10 has a common lead and pin on the connector associated with that board.
The 3 connectors go to a PNL board, which is the button panel on the left. If you have 10 lamps not working, that connection or circuit may be the problem.
It's a warranty job if you are covered by a Yamaha America warranty. If not it MAY be something you could check yourself, if you could latch onto a Service Manual.
The manual states that the estimated service time for removal of these boards is about 25 minutes. Probably 3 hours and many cold sweats if you check it yourself. Let us know how you make out.
Phil

[anothermineral]

Phil,

Thanks for the info, I'll let you know how it turns out.