Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
Announcement
Collapse
No announcement yet.
User Profile
Collapse
-
[URL=filedata/fetch?filedataid=333496][ATTACH=JSON]{"data-align":"none","data-size":"custom","data-tempid":"temp_333496_1712933432028_937","height":"203","width":"313"}[/ATTACH][/URL] hello everyone, the site does not allow r posting the complete manual so here is the clip of the error from the manual....1 Photo
Leave a comment:
-
Some measurements. there are some misspellings but I can remember how to spellcheck in paint. I do not know if the lack of continuity is normal. Continuity is seen between( the green side) resister bank R651 and associated pins 94.95,96 and 97 respectively. There is no continuity across R651 to IC601 just resistance of .670k ohms
[ATTACH=JSON]{"data-align":"none","data-size":"custom","height":"433","width":"499","data-attachmentid":3251283}[/ATTACH]...
Leave a comment:
-
The original problem from the diagnostic output was " No ROM Correction"(misstated earlier and I cannot edit the post)
When /CS asserts "Low" the EEPROM (IC651) accepts correction from ROM (IC641), correct or not?
If I am correct should I investigate interactions between IC651 and IC641?
I don't know which will be helpful but I am going to include some measurements I took last night, all are a learning experience for me. BTW I would be excited to use my o-scope but I am afraid I could damage the unit. Further thoughts on correct usage...
Leave a comment:
-
Ok, Maybe Im not asking the questions properly. Please refer to the image (Fig. 1) Legs 5,6,1 and 2 go through a resister bank labeled R651. I don't understand the # configuration next to the individual resisters.
Leg 5 is Signal in from DSP?
Leg 2 is Signal out to DSP?
why does Leg 2 go to R654 then to VCC (Protection?)
Leg 1 goes to ROMCSB. What is this?
I don't know what legs 7 and 3 contribute to the circuit.
I will start w some continuity cks. please forward your thoughts about any of this....
Leave a comment:
-
Pioneer DEX-P99rs "No EEProm " diagnostic code.
Hello, My head unit developed strange behaviors so I ran the built-in diagnostic package which returned "No EEProm". The service manual says there is no EEProm connected. I approached Pioneer and they said to swap out the DSP board. All said and good but the DSP board is $860 USD. I am hoping someone can help me
1). Understand the schematic and check the connections between the EEProm and DSP
2). Check the functionality of the EEProm
I don't know if this is the unit's problem but it's a place to start.
I have little to no electronic experience...6 Photos
-
Hello everyone, I am a long-time electronics enthusiast looking for a new hobby. I have watched many YouTube videos and repaired a few items. I hope to gain knowledge of electronics repair the help me fix some pet projects. My second post will be about a fussy Pioneer EEProm. Cheers!
Leave a comment:
No activity results to display
Show More
Leave a comment: