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Search: Posts Made By: notallbad
Forum: Troubleshooting TVs and Video Sources 05-26-2019, 08:11 AM
Replies: 5
Views: 119
Posted By notallbad
Re: Luxor Lux0143002/01 tab bond issue?

Tracks damaged at the panel on the underside, think the picture speaks for itself!
Forum: Troubleshooting TVs and Video Sources 05-26-2019, 03:58 AM
Replies: 5
Views: 119
Posted By notallbad
Re: Luxor Lux0143002/01 tab bond issue?

On closer inspection it looks like burnt tracks on tabs at panel side
Forum: Troubleshooting TVs and Video Sources 05-25-2019, 06:35 PM
Replies: 5
Views: 119
Posted By notallbad
Re: Luxor Lux0143002/01 tab bond issue?

brown sticky goo on some of the tabs
Forum: Troubleshooting TVs and Video Sources 05-24-2019, 03:28 PM
Replies: 32
Views: 898
Posted By notallbad
Re: Philips 50PUT6400/12 no backlight

Update :

Thanks, just what was needed.

Highly recommended!

TV now working again.
Forum: Troubleshooting TVs and Video Sources 05-24-2019, 03:22 PM
Replies: 5
Views: 119
Posted By notallbad
Re: Luxor Lux0143002/01 tab bond issue?

Last 2 photos showing results of having t-con ribbon cables removed one at a time.
Forum: Troubleshooting TVs and Video Sources 05-24-2019, 01:46 PM
Replies: 5
Views: 119
Posted By notallbad
Forum: Troubleshooting Audio Equipment 04-14-2019, 05:56 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

So swapped out the Radioscape RS220 with a known working one and still no change so the fault is definately on the power/amp board.

Also changed out the control/button keypad and the headphone...
Forum: Troubleshooting Audio Equipment 04-11-2019, 04:59 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Not quite sure how to progress with this now so have bought another identical working unit to swap the Radioscape DSP over to prove thats the fault which I highly suspected from the start.
Shall...
Forum: Troubleshooting Audio Equipment 04-06-2019, 07:48 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Ok, so getting audio through the LM324 via the caps on the PCM1742 VoutL and VoutR traces.
Forum: Troubleshooting Audio Equipment 04-06-2019, 06:54 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

It may well come to that but currently don't own a scope so for now shall continue troubleshooting back to the dac where possible. Fun learning on the way!

If it is the dac it'll be going in the...
Forum: Troubleshooting Audio Equipment 04-06-2019, 02:35 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Hope this close up photo shows enough detail.
Forum: Troubleshooting Audio Equipment 04-05-2019, 03:42 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

How do I inject audio through the LM324?

Same as before with the mp3 player headphone 'fly' lead via the traces on the PCM1742KE, pin 9 AGnd, pin 7 VoutL and pin 8 VoutR??? Of course isolating...
Forum: Troubleshooting Audio Equipment 04-05-2019, 07:48 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

PCM1742KE - Audio digital to analog converter

Pin 5 - digital vss - 3.2v
Pin 6 - analog vss - 4.95v
Forum: Troubleshooting Audio Equipment 04-05-2019, 06:52 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

The TA8227 inputs are fed from LM324 quad op amp which is powered by a KA7805 Volt Reg.

KA7805 volt reg :
Input - 13v
Output - 4.95v
Forum: Troubleshooting Audio Equipment 04-05-2019, 06:26 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Typo above on Post #14, should read 'Traced back TA8227', NOT TA8226!

Yep, that done it!

Audio coming through the TA8227 on both channels/outputs ok.
Forum: Troubleshooting Audio Equipment 04-05-2019, 04:45 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Where would I inject the audio output from this mp3 player via the headphone left, right and gnd wires?

Do I need to connect the headphone gnd wire to the gnd pin 4 Pre gnd on the TA8227?
...
Forum: Troubleshooting Audio Equipment 04-05-2019, 04:10 AM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

OK thanks.

Voltages on the TA8227PG
pin 1 vcc2 = STBY 0.5v - ON 12v

pin 12 vcc1 = STBY 13v - ON 13v
Forum: Troubleshooting Audio Equipment 04-04-2019, 06:21 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Power / Amp board

component side :

TA8227PG - low freq power amp

HEF4013BP - Dual D-type flip flop

solder side :
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:40 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Mains supply in / transformer / speakers
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:34 PM
Replies: 24
Views: 259
Posted By notallbad
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:23 PM
Replies: 24
Views: 259
Posted By notallbad
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:21 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Tuner / DSP board - Radioscape RS220
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:19 PM
Replies: 24
Views: 259
Posted By notallbad
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:17 PM
Replies: 24
Views: 259
Posted By notallbad
Forum: Troubleshooting Audio Equipment 04-04-2019, 05:02 PM
Replies: 24
Views: 259
Posted By notallbad
Re: Technika 206 DAB radio NO AUDIO

Re-capped the KSC caps, the 4 bigger main ones on the power distribution/amp board.
Showing results 1 to 25 of 500

 
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