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51
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by djkrasikn on November 29, 2022,13:23:13  »
I removed the chip but I can't find such an IC 6001 M37761vlve-1
I don't know where to buy
this one is similar but it won't happen for sure
https://www.aliexpress.com/item/1005002778857085.html?gatewayAdapt=4itemAdapt
52
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by downunder on November 28, 2022,01:59:34  »

IC3002 + IC3906: Input pin is 8 = 5.8V, Output pin is 1 = 5V, On/Off Switching pin is 5 = high . This is the same in all modes i.e Play, Stop, Rec.

IC3906: Input pin is 4 =5.8V, Output pin is 1 = 5V, On/Off is pin 3 = 4.6V in all modes.

QR4501 has 4.6V on the base only in all modes.

The service manual does have a voltage chart for all ICs .

I suspect it all comes back to Micro IC6001 not supplying switch-on volts from pin 75 to IC6302. I wouldn't attempt to remove the micro but with an injection of soldering flux under it and judicious application of a heat gun to the top of the IC you might get sufficient solder flow at the ball joints to remake any poor contact.
53
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by djkrasikn on November 27, 2022,07:59:39  »
IC7402
54
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by djkrasikn on November 27, 2022,07:58:01  »
From the picture IC6302 pin 3 /on/ should turn it on, but I don't know where to look for it.
The ones in the picture refer to IC3002; QR4501; IC3906; IC7402 I measured the voltages when assembled and switched on
IC3002 pin 1 measured input 1.68 volts, pin 5 output 0.03 volts per case
IC3906 pin 1 measured input 5 volts, pin 5 output 4.7 volts per case
IC7402 pin 1 measured input 0.17 volts, pin 5 output 0.03 volts per case
QR4501 in one place is 12 and in the other two 0 per case
55
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by downunder on November 27, 2022,04:11:33  »

What happens if you short IC6302 input (5.8V) to its output? Does the VCR function then? The videos tell me little that's useful.
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DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by djkrasikn on November 27, 2022,01:05:41  »
Hi, what should I do?

I made videos
https://www.youtube.com/watch?v=hZwikma_E_U 
https://www.youtube.com/watch?v=Q6478jU54vA

this model how it is made, only i have no error on the display
https://www.youtube.com/watch?v=yZhVsh4zBkA
57
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V vcr no power
« Last post by downunder on November 27, 2022,00:05:37  »

What about the switching voltage that is supplied by IC6001 to turn it on. There'll be no output without that.
58
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V
« Last post by djkrasikn on November 26, 2022,13:54:09  »
I just checked IC6302 pin 1/output/ is not on ground
at the input of IC6302 pin 4 there is 5.8 volts
59
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V
« Last post by djkrasikn on November 26, 2022,13:43:22  »
thanks
I will check now
60
DVD/VIDEO/Home Cinemas/Hi-Fi/Mp3/Camcorder / Re: Panasonic DMR-ES30V
« Last post by downunder on November 23, 2022,02:56:41  »
 
IC 6302 is merely a switch for the 5V supply to IC 2501. The switching voltage comes from pin 75 of IC6001, the system control/servo/timer IC. You need to determine if the switching voltage is present, if IC6302 is operational or if the output of IC6302 is shorted to ground.                         Bruce
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