Hi all, I'm new in the forum and I need some help from somebody with experience on Vintage Pioneer CD players
I was recalibrating a Pioneer PD 73 that was always creating troubles with skipping CD when I, by mistake, shortcircuited Pin 1 (RF) and Pin 2 (T.Err) of TP1. The device was in test mode when the shortcircuit took place. Suddenly the device display turned off as well as the power led indicating operating conditions. Trying to turn off and on again the device didn't helped nor anything else. Basically I now have a nice black shiny BRICK!!!!😢
This already happened a month ago on a Pioneer PD 7300, but given the lower value of that device I didn't spend too much time troubleshooting it. With PD 73 situation is pretty different since I really don't want to throw such an amazing piece of hardware to the bin.
Anyone that experienced something similar in the past or that can help on troubleshooting?
Many thanks, Riccardo
I was recalibrating a Pioneer PD 73 that was always creating troubles with skipping CD when I, by mistake, shortcircuited Pin 1 (RF) and Pin 2 (T.Err) of TP1. The device was in test mode when the shortcircuit took place. Suddenly the device display turned off as well as the power led indicating operating conditions. Trying to turn off and on again the device didn't helped nor anything else. Basically I now have a nice black shiny BRICK!!!!😢
This already happened a month ago on a Pioneer PD 7300, but given the lower value of that device I didn't spend too much time troubleshooting it. With PD 73 situation is pretty different since I really don't want to throw such an amazing piece of hardware to the bin.
Anyone that experienced something similar in the past or that can help on troubleshooting?
Many thanks, Riccardo
I would look at supply voltages and find the supply that has been destroyed. You may need to replace IC1 the RF Amp chip.
Many thanks for your valuable suggestions!
I've started the troubleshooting on the PD 7300 whose power section is easier to access because my assumption is that what could fix PD7300, pretty likely, could also fix PD 73 since the cause (short between RF and TErr pins of TP1) was the same on both player.
That said, I've checked the sibling semiconductors fuses on PD 7300 (IC 30 and IC 31) but, sadly, they are ok and voltages, before and after, are respectively -11V (nominal -10V) and +11V (nominal +10V).
To move forward I've then started checking the voltages printed on the PCB and I've found that, in the area highlighted in red, the +5V points are dropped to +2.15V.
Any further suggestion where to look next?
I've attached for your comfort the PD 7300 Service manual
I've started the troubleshooting on the PD 7300 whose power section is easier to access because my assumption is that what could fix PD7300, pretty likely, could also fix PD 73 since the cause (short between RF and TErr pins of TP1) was the same on both player.
That said, I've checked the sibling semiconductors fuses on PD 7300 (IC 30 and IC 31) but, sadly, they are ok and voltages, before and after, are respectively -11V (nominal -10V) and +11V (nominal +10V).
To move forward I've then started checking the voltages printed on the PCB and I've found that, in the area highlighted in red, the +5V points are dropped to +2.15V.
Any further suggestion where to look next?
I've attached for your comfort the PD 7300 Service manual
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I confirm that after having replaced the IC 32 (icp-f15) with a "compatible" BUSS SR-5 (630mA) the player turns on again! I'll replicate the same fix on PD 73 hoping and let you know!
Thanks @ManoloMos for the hint!
Thanks @ManoloMos for the hint!
This afternoon I've also replaced IC26 on PD 73 with a BUSS SR-5 (630mA) and I confirm that this made the CD player turning on again!
For posterity:
To fix the issue, just replace with identical component if available (some on Aliexpress) or with compatible (I used BUSS SR-5 @630ma)
Cheers, R
For posterity:
- on PD 7300 I've checked IC30, IC31 and IC32. This last one (ICP-F15) got burned when accidentally shorting Pin1 and Pin2 on TP1.
- on PD 73 I've checked IC22, IC23, IC24 and IC26. This last one (ICP-N15) got burned when accidentally shorting Pin1 and Pin2 on TP1.
To fix the issue, just replace with identical component if available (some on Aliexpress) or with compatible (I used BUSS SR-5 @630ma)
Cheers, R
It's unfortunate that your Pioneer PD 73 CD player isn't working after the short circuit. The first thing to do is to check if there are any blown fuses or damaged components on the circuit board. It's possible that the short circuit caused some damage to the power supply or other parts of the circuitry.
You could start by opening up the CD player and visually inspecting the circuit board for any signs of damage, such as burned or discolored components. Check if any fuses have blown or if any of the capacitors or other components look swollen or damaged.
If you have a multimeter, you could also perform some basic tests to check for continuity and voltage levels in different parts of the circuit. It's possible that the short circuit caused a voltage spike that damaged some of the components or ICs.