Hi there, I'm new to this forum, so am not sure if this is the right place to post this request. I'm trying to fix a Pioneer DV-S6D DVD player that is not powering on, but has that annoying blinking stand-by light symptom. I checked out the pcbs, and the problem seems to be with the PSU PCB (PSU Assy VWR1316).
I did some DMM tests as follows:
- main fuse and microfuses (P211 & P611) are intact and not blown - not sure about R711 (supposed to be a microfuse as well?)
- Ceramic Cap C151 appears slightly toasted, so I will desolder and test out of circuit (not done yet)
-Resistor R151 looks slightly toasted, but could be carbon deposits - the color is off, so I can't reliably read the value of the resistor (can anyone tell the value of the resistor from the picture?)
- I have tested all of the diodes in-circuit and those that appear problematic are as follows: D104 (Zener diode MTZJ2.4B), D311 (leads to +5V rail after passing through IC311), D411 (leads to +3.3V rail after passing through IC411), and D811(leads to EV.+5V)
I don't have a schematic handy (only the parts list), but have taken pictures as below and circled the above problematic areas.
My main issue is that I can't identify the specs of the three diodes D311, D411, and D811, since the parts list only shows these as proprietary Pioneer component numbers (D311=VZF1076, D411=VZF1075, D811=VZF1054). Can someone help identify what replacements I can potentially use for these diodes? I have no idea what the current and voltage specs on these diodes should be, so any help would be appreciated
!
I did some DMM tests as follows:
- main fuse and microfuses (P211 & P611) are intact and not blown - not sure about R711 (supposed to be a microfuse as well?)
- Ceramic Cap C151 appears slightly toasted, so I will desolder and test out of circuit (not done yet)
-Resistor R151 looks slightly toasted, but could be carbon deposits - the color is off, so I can't reliably read the value of the resistor (can anyone tell the value of the resistor from the picture?)
- I have tested all of the diodes in-circuit and those that appear problematic are as follows: D104 (Zener diode MTZJ2.4B), D311 (leads to +5V rail after passing through IC311), D411 (leads to +3.3V rail after passing through IC411), and D811(leads to EV.+5V)
I don't have a schematic handy (only the parts list), but have taken pictures as below and circled the above problematic areas.
My main issue is that I can't identify the specs of the three diodes D311, D411, and D811, since the parts list only shows these as proprietary Pioneer component numbers (D311=VZF1076, D411=VZF1075, D811=VZF1054). Can someone help identify what replacements I can potentially use for these diodes? I have no idea what the current and voltage specs on these diodes should be, so any help would be appreciated
!
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