I have an amplifier DSP A 1000. When I turn it on it always working for a while, sometimes 1 hour sometimes just 15 minutes then turned off by it self. which circuit I should check?

Check the output transistors for leak.

https://www.samswebsite.com/en/photofact/details/index/id/228080

Open following link to identify TM311 timer:
http://www.amazon.com/Intermatic-TN311C-Heavy-Grounded-Timer/dp/B00002N5FO

1) First of all, you would need more turquoise 107TN222 ON and red 107TN221 OFF trippers.

2) BUT big problem is that TN311 time dial is divided into half-hour segments, so minimum on-off is probably 1 hour since it takes 2 trippers for on-off cycle, and width of 2 trippers is same width as 1 hour.

3) Open following link for plug-in timers with 15 minute segments shows Woods 49664 & Stanley 31192 & Sylvania SA110
http://waterheatertimer.org/Woods-timers-and-manuals.html#49664

4) Notice the 49664 dial, that each hour is represented by 4 segments. This says timer on-off period is 15 minutes.

To set this timer, you would pull up all segments around the dial, and then push down 1 segment for each hour that you want timer to turn on for 15 minutes.

5) TN311 has 3 prong grounded outlet, Woods 49664 has 2-prong outlet.

6) Stanley 31192 timer and Sylvania SA110 have 3-prong grounded outlets and 15 minute intervals.

7) You cannot accomplish 15 minutes intervals for 12 periods a day with programmable digital timer.
Most digital timers allow 1 minute program times, but are limited to 6 or 7 programs, and not the 12 separate on-off periods needed for your project.

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The manual is available to download on the Yahama site (usa.yamaha.com). Click on the "support" tab.

Display Selector (DSP)
This unit can display either the clock time or
radio frequency/CD player functions. Ordinarily,
the radio frequency or CD player track
indication is displayed, but the unit will display
the time when the DSP button (18) is pressed.
The time will display for approximately 5
seconds then return to the radio or CD player
function display. The correct time-of-day can be
set by pressing and holding the DSP button.
Setting the Clock
To set the clock, perform the following steps:
1. Turn the vehicle ignition and radio on.
2. Press and hold the DSP button (18) until
the time display flashes.
3. Within 5 seconds, turn the MULTI/JOG
control (3) clockwise to adjust the minutes
to the desired setting.
4. Turn the MULTI/JOG control counterclockwise
to adjust the hour and the “AM”/

to reset the pas-loc turn the to on position 10 to 15 min.then turn the key off for a few seconds,then start the car/if your security light is on do this like i said for 10 to 15 minutes.the light should go off,then turn the key off and wait a moment then start it,you dont have to wait the 1/2 hour out

It sounds like a power supply problem. If you can find the power supply board, look for bad solder joints, look for caps that might be bulging on the top, could be a leaky cap. I'm not sure of your power button, but it could be faulty.

These issues can only be fixed by an audio-tech.

Do a websearch around your area for a repair person

Hi...
Is the first set "stereo" settings and the 2nd set "surround" settings?
If so that may mean that the surround speakers arent all connected right.

If you see smoke, it's virtually always the power supply transistors. There are several things that can cause it but sometimes, they simply fail. I will generally work with people who want to repair their own amplifiers but the this JL amplifier is complex and not always an easy amplifier to repair.

If you can't find a local repair shop to repair it, you'll have to go through an authorized JL retailer to have it repaired by JL.

Let me know if you have any other questions.