2017 was our 20th year online!

Welcome to the Piano World Piano Forums
Over 3 million posts about pianos, digital pianos, and all types of keyboard instruments.
Over 100,000 members from around the world.
Join the World's Largest Community of Piano Lovers (it's free)
It's Fun to Play the Piano ... Please Pass It On!

Shop our online store for music lovers
SEARCH
Piano Forums & Piano World
(ad)
Best of Piano Buyer
 Best of Piano Buyer
(ad)
Advanced Piano Tricks
Advanced Piano Tricks
(ad)
Pianoteq
Steinway Spiro Layering
(ad)
Wessell Nickel & Gross
PianoForAll
Who's Online Now
107 members (An Old Square, 36251, AndreaH, blueviewlaguna., AnnaF, Albertan, Animisha, Boylan, beeboss, Andy R, 24 invisible), 1,267 guests, and 421 robots.
Key: Admin, Global Mod, Mod
(ad)
Estonia Pianos
Estonia Pianos
Previous Thread
Next Thread
Print Thread
Hop To
#3174332 12/01/21 12:06 AM
Joined: Nov 2021
Posts: 7
M
Junior Member
OP Offline
Junior Member
M
Joined: Nov 2021
Posts: 7
Hello there!

I just obtained a beautiful keyboard, but it has a pretty serious issue. It powers on, but there is no sound, not from the keys, the metronome or the includes songs. The internal amplifier works as I can plug a guitar into the INPUT jack on the back and the guitar comes out great. The output and headphone jacks produce no sound either. All of the buttons are responsive.m, e.g. lights go on then a different voice is selected.

Does anyone have any ideas where the culprit might be? Thanks.

Joined: Nov 2009
Posts: 4,075
S
4000 Post Club Member
Online Content
4000 Post Club Member
S
Joined: Nov 2009
Posts: 4,075
Open it up, if you're lucky something obvious will be visible, loose or disconnected wire, blown capacitor, charring or other damage such as lifted track or obvious dry joint. Maybe even a battery cell that can be replaced. Otherwise, you need a scope and multimeter and circuit diagram to go with some electronics knowledge to perform troubleshooting. Taking it to a repair shop may cost more than it's worth compared to equivalent new.

Joined: Nov 2004
Posts: 219
P
Full Member
Offline
Full Member
P
Joined: Nov 2004
Posts: 219
Did you check the local on/off switch on the back?


--------------------------------------
Pro-TAC tuning and repair service.
pro-tac.jpn.org/
--------------------------------------

Joined: Nov 2021
Posts: 7
M
Junior Member
OP Offline
Junior Member
M
Joined: Nov 2021
Posts: 7
Yes, that's one of the first things I've checked.

The keyboard is opened up, but I haven't checked everything thoroughly yet

Joined: Nov 2019
Posts: 195
A
Full Member
Offline
Full Member
A
Joined: Nov 2019
Posts: 195
Originally Posted by mettleramiel
Yes, that's one of the first things I've checked.

The keyboard is opened up, but I haven't checked everything thoroughly yet

You might want to have a look at this thread:

https://www.justanswer.com/electron...and-hp-2900g-digital-piano-turns-no.html

Good luck!


Peter
--------------------------------
Yamaha U1 / Kawai CS11 / Kawai MP-11SE / Kawai MP-7SE / Hammond XK-3c / Vox Continental 73
Working on: PCA Beginner Course and
Tim Richards - Improvising Blues Piano
Joined: Nov 2021
Posts: 7
M
Junior Member
OP Offline
Junior Member
M
Joined: Nov 2021
Posts: 7
Thanks! I did actually go over that thread already, that's how I knew to check that the internal amp was workint. Unfortunately, the thread peters out once the person seeking assistance changes what is wrong and no answer is ever provided

Joined: Nov 2019
Posts: 195
A
Full Member
Offline
Full Member
A
Joined: Nov 2019
Posts: 195
Originally Posted by mettleramiel
Thanks! I did actually go over that thread already, that's how I knew to check that the internal amp was workint. Unfortunately, the thread peters out once the person seeking assistance changes what is wrong and no answer is ever provided

Ok. Didn't check it all the way... :/(


Peter
--------------------------------
Yamaha U1 / Kawai CS11 / Kawai MP-11SE / Kawai MP-7SE / Hammond XK-3c / Vox Continental 73
Working on: PCA Beginner Course and
Tim Richards - Improvising Blues Piano
Joined: Nov 2004
Posts: 219
P
Full Member
Offline
Full Member
P
Joined: Nov 2004
Posts: 219
I don't have a 2900 service manual, but I have HP2700 manual .The master volume control is controlled by VCA circuit , so it may be broken or there may be a problem with the volume fader. If the output of the DAC is normal, I guess it's a VCA circuit.


--------------------------------------
Pro-TAC tuning and repair service.
pro-tac.jpn.org/
--------------------------------------

Joined: Nov 2021
Posts: 7
M
Junior Member
OP Offline
Junior Member
M
Joined: Nov 2021
Posts: 7
The volume slider seems to work. With the shielding removed from the mainboard, there is a slight buzzing which is affected by the volume slider

Joined: Nov 2004
Posts: 219
P
Full Member
Offline
Full Member
P
Joined: Nov 2004
Posts: 219
If there is no rhythm or metronome sound, then the main volume VCA instead of the DAC Is suspicious.There may be a sound if you bypass the main volume


--------------------------------------
Pro-TAC tuning and repair service.
pro-tac.jpn.org/
--------------------------------------

Joined: Nov 2021
Posts: 7
M
Junior Member
OP Offline
Junior Member
M
Joined: Nov 2021
Posts: 7
Is your repair manual a physical or digital copy?

Joined: Nov 2004
Posts: 219
P
Full Member
Offline
Full Member
P
Joined: Nov 2004
Posts: 219
The service manual is following URL.
https://www.synthxl.com/hp-2700/

Good luck.( ^ω^ )


--------------------------------------
Pro-TAC tuning and repair service.
pro-tac.jpn.org/
--------------------------------------


Moderated by  Piano World 

Link Copied to Clipboard
(ad)
Faust Harrison Pianos
Faust Harrison 100+ Steinway pianos
(ad)
PianoDisc

PianoDisc
(ad)
Piano Life Saver - Dampp Chaser
Dampp Chaser Piano Life Saver
(ad)
Mason & Hamlin Pianos
New Topics - Multiple Forums
Pleyel 1846 advice on purchase please!
by AnnaF - 01/27/22 09:33 AM
How do I find current selling price for my piano?
by AndreaH - 01/27/22 09:11 AM
An Interesting day recording . .
by peterws - 01/27/22 08:46 AM
High pitch ringing on mi3
by elmarmarmar - 01/27/22 08:41 AM
ARSM pieces
by Chrisandellie - 01/27/22 08:25 AM
Download Sheet Music
Virtual Sheet Music - Classical Sheet Music Downloads
Forum Statistics
Forums42
Topics211,380
Posts3,164,395
Members104,184
Most Online15,252
Mar 21st, 2010
Please Support Our Advertisers

Faust Harrison 100+ Steinways

Dampp Chaser Piano Life Saver

 Best of Piano Buyer

PianoTeq Bechstein
Visit our online store for gifts for music lovers

Virtual Sheet Music - Classical Sheet Music Downloads



 
Help keep the forums up and running with a donation, any amount is appreciated!
Or by becoming a Subscribing member! Thank-you.
Donate   Subscribe
 
Our Piano Related Classified Ads
| Dealers | Tuners | Lessons | Movers | Restorations | Pianos For Sale | Sell Your Piano |

Advertise on Piano World
| Subscribe | Piano World | PianoSupplies.com | Advertise on Piano World |
| |Contact | Privacy | Legal | About Us | Site Map | Free Newsletter | MapleStreetMusicShop.com - Our store in Cornish Maine


© copyright 1997 - 2022 Piano World ® all rights reserved
No part of this site may be reproduced without prior written permission
Powered by UBB.threads™ PHP Forum Software 7.7.5