Question about Pioneer IS-21MD CD Shelf System

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Problems changing line 2 to line 1 on the hifi

Hi hello well my system was working fine as i had a pair of cjd working though line one then one day i went to play some music but cant seem to change line 2 to line 1 on the aux line could anyone please help as i have lost my manual thanks

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Have a tech look at your set your switching chip it defected.good luck.

Posted on Jun 04, 2007


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Posted on Jan 02, 2017


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Can you fill in something about the speakers and how you have them attached? Since this is a stereo amplifier one wonders how you have anything but the front speakers powered unless you're using THIS amp for just the one pair and driving it from an AV receiver pre-out.

What else is missing from this problem description?

Feb 02, 2011 | Technics SUV500 2-Channel Amplifier


How to repair keypad problem in China Mobile

First we need to know china phone keypad connected with PCB how way
(A) Direct on PCB
(B) Flex System (flex cable direct soldering pcb to keypad panel)
© Flex and socket system include (flex one side soldering with key panel other side connect to pcb with socket)
(D) only Socket System (here have 2 socket, 1 with key panel others with pcb)
Keypad problem have various type
1. All key not work.
2. some key work and some other not work.
3. sometimes work and sometimes not work.
1. All key not work
china phone all key not work for this type of problem
(A) though its touch screen phone, first try to disconnect touch panel line from phone pcb or display flex (4 line)
(B) though not solve and keypad direct on pcb first you try to good clean full pcb with cleaner.
© though not solve now you try to format/flash your phone because some time key problem come from software problem.
(D) though still not solve now you check must be CPU. 95% china phone keypad directly going in cpu. and other 5% first going to resistor or capacitor near the cpu or keypad than going to cpu. so now first check them than you can try to re-hot, re-soldering or changing cpu.
(E) though its flex or socket system, first check GND connection continuslay pcb to key panel. next check full flex or socket all line going continuously pcb to key panel or not. also sometimes flex or socket shorted with other line or gnd so check also them.
(F) Also you can check all key anyone is short 2 line.
(G) sometimes keypad line broken from cpu pin on pcb to key panel, so check them.
2. Some key work and some other not work
Some key work and some other is not work for this type of problem
(A) maximum time this problem we face for flex or socket system keypad. so check flex cable and socket all line any line is broken or not and though need change them. and check all key connection on key panel.
(B) though its direact on pcb, some of key line broken internaly. and maximum china phone have alternative test point near every key or with other key on keypad. so check them with multimeter and though need connect to not work key with near testpoint or other working key.
© common problem is keypad metal ball (which is short 2 line on key when we press) sometimes its damage for phone water damage or over key voltage, so clean them or change.
(D) also try to check line continuously from cpu to not working key.

3. sometimes work and sometimes not work
this problem come from this defect
(A) flex or socket system keypad any line is bad soldering or do lose contact. check them and
re-soldering or keep there line join with extra ware.
(B) for cpu bad soldering or cpu pin is broken. so re-hot or re-ball cpu.

on Jan 06, 2010 | Cell Phones

1 Answer

No sound coming from my blurparrott b250-xt, but it's paired to my jblackberry 9700 no voice dail was working fine.


"no voice dial was working fine."

I cant understand this line.What are you trying to say please be explain more.

Have you tried to reset the device?Just try and let me know.
1 switch phone on and pair with headset.
2 when paired (blue light flashing) put the charger on the headset for exactly 10 seconds.
3 Remove the charger.
4 The lights alternates between red and blue(Resetting)
5 When light stops, it is resetted.

If still the problem persist it is hardware problem so let me know so i can help you more.

post a comment for further assistance.
Thank you for using fixya have a nice day:-)

Sep 27, 2010 | VXI Corporation Blueparrott B250-XT...

2 Answers

Hello! I have Sony MDR-RF800R wireless stereo hea...

Hi there. I had the same problem after a while of having them packed and unused! Try this: Hard clean the batteries connectors with alcohol or some other cleaning fluid (I don't remember which one I've used). It solved my problem and now they charge fine and even with the expiration date of the batteries expired they are still working but I mean working very very well. Hope this helped though somewhat late reply... Might help other users too!

May 20, 2010 | Computers & Internet

1 Answer

TEAC CD player jammed

I had the same problem in 2007: I removed the cover and manually encouraged the cd drawer to open. It has been working ever since.

Jun 12, 2009 | Teac PD-H500 CD Player

1 Answer


First switch the speakers over to make certain it is not the amp that is the problem.
If the speaker is still playing up on the other channel, then I would look around at a new set of speakers. They can be any that you like the look of as long as they have a power ratting at 40 watts or above each. The amp says it can take 6 to 16 ohm speakers. I would go for 8 ohms as they are more common.

Jul 03, 2017 | Kenwood NV-600 CD Shelf System

1 Answer

Problem with my MX Gt 88!!

use the speakers it came with it works fine for me i have mine hooked up to a 300w inverter anything less i dont get the best sound you cant turn the volume up too loud on the reciever it will draw too much power and shut it off or blow the fuse in you car unless the inverter you are using has an external fuse on it my inverter warns me that i am drawing to much power so when i hear the beep i turn it down a notch and works fine but ya try using the speakers th system came with

Nov 02, 2007 | JVC MX-GT88 CD Shelf System

2 Answers

Mhc-gnz88d (sony hifi DVD System)

5e592bd0-46d6-403f-ab4a-21969e3345d5.jpegI have a SONY MHC-GNZ88D Mini Hifi System. Everytime problem while play a CD or a DVD. The problem display "DESK ERROR". CD & DVD working but Next, Fwd, Stop etc buttons are not working.please help me.
My cont number - +91-9031257594 Nazish

May 21, 2007 | Sony Multi-System Mini Hifi Systems / DVD...

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