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Search: Posts Made By: petehall347
Forum: Troubleshooting Game Consoles & Other Weird Devices Today, 05:38 PM
Replies: 2
Views: 27
Posted By petehall347
Forum: Troubleshooting TVs and Video Sources Today, 05:33 PM
Replies: 7
Views: 39
Posted By petehall347
Re: Panasonic TH-50AS700 - Can I rely on LED tester results?

i have only just got one of those testers and it works like i said . say i test one 3v led it reads 3v .. if i test a string of 20 it reads 60v ..if i test a string of 20 with 3 shorted ones it reads...
Forum: Troubleshooting TVs and Video Sources Today, 04:48 PM
Replies: 7
Views: 39
Posted By petehall347
Re: Panasonic TH-50AS700 - Can I rely on LED tester results?

yes if the voltages equate to the amount of lamps times each ones normal running voltage
example 20 lamps at 3v running voltage =60v . might not be dead on accurate reading on your tester .
Forum: Troubleshooting TVs and Video Sources Yesterday, 05:50 PM
Replies: 9
Views: 243
Posted By petehall347
Re: digihome ptdr24hds3 backlight only no picture

righto i might have time to look at this again .if anyone sees this post i would like to know the test points to start with . i find it hard when the schematics are not in one .
Forum: Troubleshooting TVs and Video Sources Yesterday, 05:46 PM
Replies: 17
Views: 388
Posted By petehall347
Re: 40/233f bush tv powers on no backlight

well its still working for the owner
Forum: Troubleshooting TVs and Video Sources Yesterday, 04:19 PM
Replies: 31
Views: 249
Posted By petehall347
Re: haier 65uf2505 help with T-con problem diagnosis

insulate your probes so tip only showing
Forum: Troubleshooting Audio Equipment 08-11-2020, 06:58 PM
Replies: 56
Views: 618
Posted By petehall347
Re: Help diagnosing Pyle Receiver PTA66BT with burned resistors

yes resistors can be like fuses .but fuses are to protect against fire not further damage .
Forum: Troubleshooting Audio Equipment 08-11-2020, 06:55 PM
Replies: 41
Views: 315
Posted By petehall347
Forum: Troubleshooting Audio Equipment 08-11-2020, 06:54 PM
Replies: 41
Views: 315
Posted By petehall347
Forum: Troubleshooting Audio Equipment 08-11-2020, 05:21 PM
Replies: 41
Views: 315
Posted By petehall347
Forum: Troubleshooting Audio Equipment 08-11-2020, 04:58 PM
Replies: 41
Views: 315
Posted By petehall347
Re: Strange malfunctioning LED audio peak level meter problem

check the soldering around both ic chips
Forum: Troubleshooting Audio Equipment 08-11-2020, 01:39 PM
Replies: 14
Views: 162
Posted By petehall347
Forum: Troubleshooting Audio Equipment 08-11-2020, 10:01 AM
Replies: 14
Views: 162
Posted By petehall347
Re: C-Audio RA500 troubleshooting

is it a shared power supply ?
Forum: Troubleshooting Audio Equipment 08-11-2020, 09:16 AM
Replies: 14
Views: 162
Posted By petehall347
Re: C-Audio RA500 troubleshooting

might be in protect .. are there lights on the front to say ?
am guessing its class D ?
Forum: Troubleshooting Audio Equipment 08-07-2020, 06:18 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

there are separate amplifiers all sharing the same power supply .
Forum: Troubleshooting Audio Equipment 08-07-2020, 05:43 PM
Replies: 56
Views: 618
Posted By petehall347
Re: Help diagnosing Pyle Receiver PTA66BT with burned resistors

good part is those transistors should be easy to find by the bagful .. and cost pennies . to test remove them all to test as circuit is parallel transistors ..... you will need 3 matched ones or...
Forum: Troubleshooting Audio Equipment 08-07-2020, 03:56 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

and that -14v i mentioned . or was it minus 24v ? anyway it connects to all the differential amps that control dc offset . i got a bit lost with that as it has a strange circuit .i thought maybe a...
Forum: Troubleshooting Audio Equipment 08-07-2020, 02:49 PM
Replies: 1
Views: 44
Posted By petehall347
Re: Grundig cl2300 radio unlock

look here ... https://instant-radio-code.com/grundig-challenge-cl-2300-vw-radio-unlock-code
Forum: Troubleshooting Audio Equipment 08-07-2020, 01:53 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

maybe different length screws
Forum: Troubleshooting Audio Equipment 08-07-2020, 08:17 AM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

i only used Q1002 as an example .. its fairly straightforward looking at the schematic .
from what i read offsets are only high when channel is active . and not just one channel . 400mv offset . ...
Forum: Troubleshooting Laptops, Portable, and Mobile Devices 08-07-2020, 02:01 AM
Replies: 14
Views: 322
Posted By petehall347
Re: What is this part??

measure ohms across the good one .
Forum: Troubleshooting Audio Equipment 08-07-2020, 01:53 AM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

what does it measure when that channel inactive ? like not selected .
Forum: Troubleshooting Audio Equipment 08-06-2020, 05:09 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

also measure at for example Q1002 base .should be 0v ..i ask this because offsets are high when active . might be stray voltage getting in here .
i have a feeling the fault might be the input...
Forum: Troubleshooting Audio Equipment 08-06-2020, 05:03 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

yes .if you look at the input to the amps on the schematic its there .
Forum: Troubleshooting Audio Equipment 08-06-2020, 04:17 PM
Replies: 35
Views: 275
Posted By petehall347
Re: Yamahaha RX-V679 DC PRT High

look for the -12.4v rail .
Showing results 1 to 25 of 500

 
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