Question about Technics SC-EH780 CD Shelf System

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How do i adjust balance on ch530 ??

Simple i'm sure!
But i am simpler!


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Hi! i am trying to detect a problem in my sony model HCD-GZR777DA when switch it on, after waiting it display c 31 00. where to start please help

31: DPD offset adjustment error .
Contact any service technician. You can't repair this. The error code list to this set:
The meaning of error code is as below:
01: Communication error (No reply from syscon)
02: Syscon hung up
03: Power OFF request when syscon hung up
19: Thermal shutdown
24: MoveSledHome error
25: Mechanical move error (5 Changer)
26: Mechanical move stack error
30: DC motor adjustment error
31: DPD offset adjustment error
32: TE balance adjustment error
33: TE sensor adjustment error
34: TE loop gain adjustment error
35: FE loop gain adjustment error
36: Bad jitter after adjustment
40: Focus NG
42: Focus layer jump NG
51: Spindle stop error
52: Open kick spindle error
60: Focus on error
61: Seek fail error
62: Read Q data/ID error
70: Lead in data read fail
71: TOC read time out (CD)
80: Can't buffering
81: Unknown media type
Are you confident to do anything with these error displays.
If you wish to get some details; check the site linked here. Pull up older posts.

Aug 15, 2016 | Sony Audio Shelf Systems

1 Answer

No sound for the right channel

Have tried adjusting the balance?

Apr 29, 2016 | Audio Shelf Systems

1 Answer

How do I adjust Left-Right speaker balance on Sony MHC-771 Shelf System? My speakers are mounted the way that I am closer to one of them and I need to compensate for that. Thanks Tom

If you have balance controls for each speaker decrease the vol. to the one closest to you. If you do not have separate balance controls , the one closest to you must be muffled so that the sound will be absorbed and will not sound as loud as the other speaker.

Oct 12, 2014 | Sony MHC-771 Shelf System

1 Answer

I have a BEO Sound 9000 system. When I try to play a CD (in the upright player with space for 6 discs), there are a few clicking noises sometimes a brief rotation and then the machine defaults to...

Are you using the 9000 in the same orientation as before ie vertical then a new cd mech is required, a workshop job only, if you have moved unit then adjustment of the cd mech suspension is required, a simple adjustment shown in the owners handbook.

Jan 09, 2011 | Bang and Olufsen Beocenter 9300 Shelf...

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The sound only comes out of the right speaker. Is there a way to adjust the balance of the speakers, or is it just a bad wire?

I don't believe there is. I think it's hard wired to be balanced in the middle. BUT, I saw a display model at the store that had the same problem.

Let's try the simple ideas first. Turn the unit around and twist and push the plug up in place to make sure it's firmly connected. Might even try unplugging it, then plugging it back in again.

If that doesn't fix it, try running your fingertips slowly over the cord (lightly grasping the cord between thumb and forefinger) and see if there are any damaged places on the cord. This could be caused by shipping damage or manufacturing damage, or even your furry kids. *giggle*

If those ideas don't produce any results, then there's most likely a broken wire in the cord that leads from the speaker to the unit. Try carefully bending the cord back and forth in U shapes and see if the sound appears then disappears. If so, then you have a broken wire. Of course even if the sound doesn't go in and out, that doesn't mean you DON'T have a broken wire... it just might be at one end or other of the cord making it harder to isolate.

If you have a broken wire, you can take it to a local electronics shop and they should be able to fix it easily and, hopefully, fairly cheaply.

Hope that helps. =)

Aug 01, 2009 | GPX HM3817DT Shelf System

1 Answer

Speaker left/right balance control

This Aiwa audio system has no balance control as its already balanced.

May 19, 2009 | Aiwa NSX-AJ20 CD Shelf System

1 Answer


Hi Vat,
Although I live in Canada now, I was born in the former
Czecholsovakia. While I spent a year in the Czech Republic in
2006, I was amazed how advanced their technology was, in
comparison to Canada or the US. If you want modern technology,
Prague is the place to go. Anyway ...

1) As I said before, do NOT adjust the tone-arm weight up
and down. This setting must be set to match the stylus and
the cartridge !!! The wrong setting is very bad.

To get the weight adjusted correctly, do the following.

a) Check the cartridge and stylus (needle) specifications, on
the WEB if necessary.

A typical tracking weight is between 0.9 grams to 1.5 grams,
but this very much depends on the needle geometry. To much
weight will damage the needle and the record, but

so will too little, because the needle will not stay on the
surface, skipping or mistracking on loud passages.

Note that the tracking acceleration is proportional to the
the square root of the loudness, multiplied by the frequency
squared. So if the tracking force is too low, the needle will
bounce over high frequencies and damage the record as
well as the needle's tip.

2) Once you know the correct force for your needle, adjust
the rear weight for ZERO force, such that the needle just
floats weightlessly in the air. If your turn-table has an anti-
skating adjustment, set that to zero as well.

3) At this point the tone-arm should be totally weightless,
and should neither touch the plater nor swing up/down
by itself. It should float halfway.

4) A this point, adjust the rear weight's dial (not the weight) to
read zero. Note that the dial will slide, while you hold the
weight still. You have now calibrated the tone-arm's zero

5) Now, adjust the weight (with the dial) to read the desired
tracking force, for example 1.25 grams.

6) Now adjust the anti-skating dial to the same number as
the rear weight. This setting compensates for the radial
(towards the center) component of the friction vector,
caused by the needle riding on the record groove, at some
specific (average) tone-arm angle.

7) Your tone arm is now balanced, and you should not
touch it after this, accept for minor adjustments.

For brand new records, you may lighten the tone-arm
by 10%. For old records, you can make it a little heavier.
Similarly, you can adjust the anti-skating to prevent a
record from skipping, but a bad record should be played
only once (and stored on your computer).

8) For some tone-arms and cartridges, the cartridge pitch
(up/down angle) is also adjustable. This requires a special
jig or gauge, supplied by the cartridge manufacturer.

The pitch can be adjusted either by the use of screws or
wedges, and by lowering / raising the rear gimble. On my
Technics SL 1200, the gimble elevation is adjustable with
a large ring, and my SURE V15 cartridge came with a guage
for adjusting it correctly.

9) It may also be possible to adjust the cartridge's yaw and
radius, but all of these adjustments should only be done
using the correct gauges and by strictly following the
cartridge installation manual.

10) NONE of these adjustments should effect the tone-arm
cueing or return process. There should be plenty of
clearence if the cueing mechanism is working properly,
except, perhaps, for the gimble elevation, if the cartridge
is unusually tall.

11) Is the cuing mechanism (i.e. the tone-arm lifter)
mechanical or hydraulic ?

Is it the lift consistent or does the tone-arm drop down
with time?

Does the tone-arm move parallel to the plater, or does the
stylus height change with tone-arm position (yaw)

You are looking for a mechanical defect in the cuing

12) How much over all lift do you get between the down position
and the up position? This should be at least 8 to 15mm

If the cuing mechanism is worn out, it may not move enough.

If it starts too low, it may move enough but not raise the
needle enough to clear the record.

If the cartridge is tracking too low, you may have to
remove some wedges or spacers between the cartridge
and the head, or lift the rear gimble if it is adjustable, or
get a different tone-arm head, that matches the cartridge

Finally as silly as this sounds, make sure that the
platter is fully dropped and properly engaged. If the
plater is too high, for what ever reason, this would also
cause the needle to drag.

Also make sure that the rubber mat on the plater is the
right one and that it is not too thick.


installation manual.

Jul 02, 2008 | Audio Shelf Systems

1 Answer


you got to much **** hooked up to it

Jan 15, 2008 | Panasonic SC-AK27 Shelf System

1 Answer

CDs keep jumping

The problem is not with the CDs, but with the laser pick up unit of your player. Cleaning the pick up unit is simple but I advise you not to venture that unless you are sure how to do it without damaging it, most probably this will fix the problem, if not you will have to change the pick up unit. If you are a techie, try adjusting the trimpot found on the pick up unit just a bit before changing the pick up unit.

Dec 18, 2007 | Technics SC-EH780 CD Shelf System

1 Answer


you can try a universal remote controller which supports your device. this is an important issue that the universal controller must have the exact remote code of your device (preprogrammed) because your remote controller is out of duty; therefore, a controller with learning capability won't solve the problem you have.

Apr 25, 2007 | Aiwa NSX-MT960 Shelf System

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