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Search: Posts Made By: coojoe_213
Forum: Troubleshooting Audio Equipment 08-02-2018, 10:30 AM
Replies: 0
Views: 328
Posted By coojoe_213
Pioneer VSX-1020 won't start /relay click /

Hi. Yesterday receiver ''stuck/freeze'' on ''POWER ON''. Today no display, no blink, only main relay click. All compination enter+power button etc.... doesmt work.
Amp section is perfect.
On IC581...
Forum: Troubleshooting Audio Equipment 03-13-2018, 08:20 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

I remove IC1206 to check voltages without this chip. When i remove IC1206 relay901 close contacts????
Voltages on IC1206 without IC1206:
1. - 0V
2. - 1.67V
3. - 9.07
4. - GND
5 - 9.36V
6. -...
Forum: Troubleshooting Audio Equipment 03-12-2018, 12:51 PM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

I check before 5 days c1218 and R1279, they are fine.
C1223/C1225/C1222/C1224 are SMD elements, and i can't check with my esr meter.
Forum: Troubleshooting Audio Equipment 03-09-2018, 05:01 PM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

2SD1733 is a NPN silicon transistor, not darlingon. You can see your web link / https://industrial.panasonic.com/content/data/SC/ds/ds4/2SD1773_J_discon.pdf / is wrong. 2sd1733 is not hot, absolutly...
Forum: Troubleshooting Audio Equipment 03-09-2018, 01:12 PM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

Q1205 is NOT Darlington
Forum: Troubleshooting Audio Equipment 03-09-2018, 11:31 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

IC1206 Voltages:
1 - 1.33V
2 - 0.25V
3 - 1.28V
4 - GND
5 - 16.5V
6 - 2.79V
7 - 1.26V
8 - 0.85V /When i press Power button, the voltages on pin 8 are again 0.85v/
Forum: Troubleshooting Audio Equipment 03-09-2018, 09:46 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

I don't have any voltages on +3.3V IC1203 , +5V IC1204 , +5V IC1208 , +5V IC1207. On service manual i will have this voltages when main transofrmer work. Main transformer will work when relay RY901...
Forum: Troubleshooting Audio Equipment 03-07-2018, 09:45 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

I replace q1205, but all is the same.
Forum: Troubleshooting Audio Equipment 03-07-2018, 02:56 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Re: Sony Str-Db 840 Completely Dead

I don't think Q1205 is bad. If i have 5v on pin8 ic1206 decided all is normal in proccessor, after that IC1206 switch 6.8v on pin 3
Forum: Troubleshooting Audio Equipment 03-06-2018, 11:57 AM
Replies: 20
Views: 1,121
Posted By coojoe_213
Sony Str-Db 840 Completely Dead

Hi everyone. My amp is dead, no std by, no relay click. All fuses is perfect, primary on main transf. is excellent.

On the AC Board, after diode on pin 2 (12V) i have 16v, pin 3 (P_OFF) i have 12...
Forum: Troubleshooting Audio Equipment 02-03-2018, 03:30 AM
Replies: 1
Views: 479
Posted By coojoe_213
Denon AVR-1705 no sound

Hi. I have Denon AVR1705, without sound on output terminas and no sound on headphone. I check all voltages and they are normal. +1.2V and +3.3V also normal.
This amp is with Sound Processor build...
Forum: Troubleshooting Audio Equipment 08-16-2017, 07:41 AM
Replies: 7
Views: 1,213
Posted By coojoe_213
Re: Tangent Amp - problem with display

This is my display. I thing this is perfect to replace. But i don't know where is the problem..., on backlight or some circuit...
Forum: Troubleshooting Audio Equipment 08-16-2017, 06:05 AM
Replies: 7
Views: 1,213
Posted By coojoe_213
Re: Tangent Amp - problem with display

Yes, i know this link, but the person who mod his amp, doesn't have my problem. I have another question. If bulb on display is blow, can i change or no?
Forum: Troubleshooting Audio Equipment 08-15-2017, 01:37 PM
Replies: 7
Views: 1,213
Posted By coojoe_213
Tangent Amp - problem with display

Hi. I have AMP-50 which work perfect put there is no light on display. There is three regulators for voltage 7805, 7808,7908. On 7805 i have 7.1, on 7808 i have 11.71v, on 7908 i have -12.04v . I see...
Forum: Troubleshooting Audio Equipment 07-20-2017, 01:45 PM
Replies: 17
Views: 1,320
Posted By coojoe_213
Re: Luxman L-111a - Bad sound on left channel

If i remove fuses from right chanell, left chanell i 90% perfect??? May zener diod make a problem?
http://www.audiokarma.org/forums/index.php?threads%2Fluxman-l-114a-overheating.413182%2Fpage-2
Forum: Troubleshooting TVs and Video Sources 07-19-2017, 11:18 AM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

TV work now. Problem: inverter , open F5, short IC.
Forum: Troubleshooting Audio Equipment 07-19-2017, 11:15 AM
Replies: 17
Views: 1,320
Posted By coojoe_213
Re: Luxman L-111a - Bad sound on left channel

Yes, i have mono switch, if i push the button mono/stereo situation is same.



I try this one yesterday but no result, same. This amp is without relay.
Forum: Troubleshooting Audio Equipment 07-19-2017, 04:50 AM
Replies: 17
Views: 1,320
Posted By coojoe_213
Re: Luxman L-111a - Bad sound on left channel

I replace all caps, the problem is same. I replace also volume potentiometer, same.
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 03:30 PM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

Ok, i remove mc33269-5.0, and when i measure output on 78m09, the situation is the same 1.3v :/.
With ohm meter you can see my pics between gnd and two ceramics caps /100nf/ which connect 78m09...
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 02:40 PM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

If i remove mc33269-5.0 is it problem, only for test?
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 01:50 PM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

55oma /in Bulgarian language=ohms/, sorry.
How to get correct voltage? I have pefect 12 volts on input 7809 (replace with new) and is the same..., may be the problem is on mc33269 ... or do you...
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 12:27 PM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

I write the two IC EEPROM with original soft at same time, but 8 time blinks.
What about PWM/ADIM? I don't have any voltages at this poing..., is it mean there is a problem?

EDIT: 458 ohm...
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 11:21 AM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

I put black probe on GND 78M09, red probe on Output 78M09. 78M09 is on the mainboard. 78M09 is brand new. How many ohm must have?
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 10:53 AM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

58.6 Ohm /78m09/
458 ohm /mc33269/
Is it normal resist.?

Question: If i have blow/bad CCFL lamp what is the simptomps?
Forum: Troubleshooting TVs and Video Sources 07-14-2017, 07:43 AM
Replies: 36
Views: 2,235
Posted By coojoe_213
Re: Samsung LCD TV 8 times blink red diode /wont turn on/

I change 78m09 with brand new, now voltage to output is 1.30v, the problem is a same, 8 blinks, no backlights. Why i have 1.30v on output?
Showing results 1 to 25 of 82

 
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