Question about Akai LCT2662 Television

2 Answers

LCT2662 - No power

Hello. I was just wondering if you have came across any of this units that have no power as a result of short on the A/D Board? I have had two of these units now. I sucessfully rebuild the power supplies only to run in to the short on the 5VDC standby. With the power supply switch on, it will only read 1.8 to 2VDC. If I unplug the connector to the main board, it will give the expected 5VDC. I have tried to trace the short down with no luck. Any help would be greatly appreciated. Thanks in advance.

Retrohack

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  • Jerry Coleman
    Jerry Coleman Apr 03, 2008

    I know the supplies that I rebuilt are good...I tried them in another LCT2662 I have that is working. I was guessing it was one of the voltage reg. ics on the main board, but no luck so far. Just thought someone else might have ran across this problem. Thanks for the quick response....



    Retro

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If it is a "low ohm" VCC to GND short. Measure caps looking for the lowest reading...may be just a little difference, but the closer you are to the short the lower the reading will be. You can also try hooking up your meter, one with 5 digit readout works best, to VCC and GND. Try to do it somewhere away from your lowest reading, and use a can of freeze spray to spray individual components. If you "hit" the shorted part the reading will fluctuate. You can test this by spraying the leads. Then you can also try the same set-up with hot air.
Good Luck,
Sam

Posted on Apr 04, 2008

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I have not seen a supply problem that after replacing the caps found something loading down the 5v line. Guess it's time to get out the scope and trace. :)
Good Luck
Bill

Posted on Apr 03, 2008

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1 Answer

No power on unit/Remote Controller


try leaving the remote unplugged and unplug the unit for 10 seconds and plug only the unit back in. If you get hot water without the remote connected but nothing after doing the same thing with the remote connected then your remote may have shorted out. Otherwise your circuit board may have had a short. In which case, call Noritz for a replacement.

Nov 21, 2013 | Noritz Water Heaters

1 Answer

Hi.. please help me.. my minolta dialta 183 is not working.. there's a code CO5 in the screen.. please help me to fix it.. thanks


C0500: Warm-up failure

Step 1
Check:
Fusing Heater Lamp (H1) turns
ON.

Step 2
Check:
Fusing Heater Lamp (H1) is open-circuited.
<Check Procedure>
Check the resistance across both
ends of the Fusing Heater Lamp
(H1).
The Fusing Heater Lamp is open-circuited
if the resistance is infinity.

Result: YES
Action: Change Fusing Heater Lamp (H1).

Step 3
Check: Thermoswitch 1 (TS1) is operational.
<Check Procedure>
Check the resistance across both
ends of the Thermoswitch 1 (TS1).
The Thermoswitch 1 is open-circuited
if the resistance is infinity.

Result: NO
Action: Change Thermoswitch 1 (TS1).

Step 4
Check: Fusing Unit Interlock Switch (S2) is
operational.
<Check Procedure>
Check continuity across terminals
when the Fusing Unit Interlock
Switch (S2) is turned ON.
• Across S2-1A and S2-1B
• Across S2-2A and S2-2B

Result: NO
Action: Change Fusing Unit Interlock
Switch (S2).

Result : YES
Action: Change DC Power Supply (PU1).

Step 5
Check: Thermistor (TH1) is open-circuited.
<Check Procedure>
Check the resistance across CN15-2
and CN15-3 on the Fusing Unit side
with CN15 disconnected.
The Thermistor is open-circuited if
the resistance is infinity.

Result: YES
Action: Change Thermistor (TH1).

Step 6
Check: The following voltages are supplied
from the Master Board (copier: PWBA).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ10A-7 and GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON
• Voltage across PJ10A-10 and
GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON

Result: NO
Action: Change Master Board (copier:
PWB-A).

Oct 05, 2011 | Konica Minolta DiALTA Di200 Copier

1 Answer

Minolta dialta 183 help me... theres a code in the screen CO5 .. and automatically turn off.


C0500: Warm-up failure

Step 1
Check:
Fusing Heater Lamp (H1) turns
ON.

Step 2
Check:
Fusing Heater Lamp (H1) is open-circuited.
<Check Procedure>
Check the resistance across both
ends of the Fusing Heater Lamp
(H1).
The Fusing Heater Lamp is open-circuited
if the resistance is infinity.

Result: YES
Action: Change Fusing Heater Lamp (H1).

Step 3
Check: Thermoswitch 1 (TS1) is operational.
<Check Procedure>
Check the resistance across both
ends of the Thermoswitch 1 (TS1).
The Thermoswitch 1 is open-circuited
if the resistance is infinity.

Result: NO
Action: Change Thermoswitch 1 (TS1).

Step 4
Check: Fusing Unit Interlock Switch (S2) is
operational.
<Check Procedure>
Check continuity across terminals
when the Fusing Unit Interlock
Switch (S2) is turned ON.
• Across S2-1A and S2-1B
• Across S2-2A and S2-2B

Result: NO
Action: Change Fusing Unit Interlock
Switch (S2).

Result : YES
Action: Change DC Power Supply (PU1).

Step 5
Check: Thermistor (TH1) is open-circuited.
<Check Procedure>
Check the resistance across CN15-2
and CN15-3 on the Fusing Unit side
with CN15 disconnected.
The Thermistor is open-circuited if
the resistance is infinity.

Result: YES
Action: Change Thermistor (TH1).

Step 6
Check: The following voltages are supplied
from the Master Board (copier: PWBA).
<Check Procedure>
Check voltage across a Master Board
(copier: PWB-A) pin and GND when
the Power Switch is turned ON.
• Voltage across PJ10A-7 and GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON
• Voltage across PJ10A-10 and
GND
DC24 V when Fusing Heater Lamp
(H1) is OFF
DC0 V when Fusing Heater Lamp
(H1) is ON

Result: NO
Action: Change Master Board (copier:
PWB-A).

Oct 05, 2011 | Minolta DiALTA Di183 Copier

1 Answer

I need to know the amp size of fuse to replace on AKAI LCT2662. thanks


If you have the original fuse, it's the number stamped on one of the end caps after the three letters denoting the fuse type. Most manufacturers also print the fuse rating on the power supply circuit board ("Caution: replace fuse only with...")

I have one of these sets in the shop now, but I haven't opened it yet. Post a reply if you can't find the fuse type and rating, and I'll let you know what my project uses.

I assume you already know fuses in TV sets don't blow by themselves, but indicate another part is shorted. Check the diodes, transistors and power ICs in the power supply before plugging the set in. If you see any bad capacitors, fix those also.

Sep 28, 2010 | Akai LCT2662 Television

2 Answers

Akai LCT2662 won't turn on, indicator solid orange


Any luck getting this fixed?Please let me know.Thank You very much!
Tyler

Jul 13, 2010 | Akai LCT2662 Television

2 Answers

LCT2662 turns on, no picture


Mine is the 5volt regutator. It works fine untill I put a load on it then it craps out. Need to know what the 5v regulator part # is.

Dec 22, 2008 | Akai LCT2662 Television

1 Answer

Akai


have akai lct2662 screen is bad power supply and board ar good tom.schulty@gmail.com

May 09, 2008 | Akai LCT2662 Television

1 Answer

No standby LED and no power when turned on


If the caps are bulged out on the top, then they are bad. I usually replace all nine of them just to be on the safe side. Also, you might want to check your 5vdc standby voltage while it is still hooked to the main board. I have ran across a few with no standby light that is caused from a short (which I can't seem to find) on the main board. The voltage always reads 2.8vdc instead of 5vdc on these. Hope this helps.

Feb 28, 2008 | Akai LCT2662 Television

1 Answer

OFF AFTER 10-15 MINUTES


This is usually caused by damaged capacitors (Akai uses very cheap components) on the power supply board. There are nine large electrolytic caps that have to be replaced. Hope this helps you out.

Feb 05, 2008 | Akai LCT2662 Television

3 Answers

No power problem.


I just got done fixing an Akai LCT2660 that had four bad capacitors on the power board.Works perfect now.Hope this helps.Thank You very much!

Tyler

Oct 19, 2007 | Akai LCT2660 26 in. HD-Ready LCD...

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