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Old 7th April 2006, 07:50 AM   #1611
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I have some OPA627 on order and im going to try the 4x 627 opamp. Which ever one i prefer the other combo will go into the custom TX KI.

Can't wait to hear the difference.

Brent
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Old 7th April 2006, 08:01 AM   #1612
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A pic of the display heater resistor, runs very cool.
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File Type: jpg display heater resistor_small.jpg (54.7 KB, 422 views)
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Old 7th April 2006, 02:20 PM   #1613
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Here is the TX diagram
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File Type: gif custom ki tx cct.gif (5.5 KB, 412 views)
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Old 8th April 2006, 08:11 PM   #1614
Gooch is offline Gooch  United States
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Hi everyone

I need some help I bypassed the HDAM on Monday and been listening to it all week.Well today someting weird started to happen CD plays to track 3 then stops thing. I tried diffence CD they all do the same thing.
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Old 8th April 2006, 10:57 PM   #1615
awpagan is offline awpagan  Australia
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Quote:
Originally posted by Gooch
Hi everyone

I need some help I bypassed the HDAM on Monday and been listening to it all week.Well today someting weird started to happen CD plays to track 3 then stops thing. I tried diffence CD they all do the same thing.

Sounds like the flat cable going to the transport, J103

put slight pressure ontop of cable and play something.

allan
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Old 9th April 2006, 12:16 AM   #1616
Gooch is offline Gooch  United States
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Hi Allen

I did that and it didn't help. I wounder if the lazier went out of focus for some reason

Regards

Dave
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Old 9th April 2006, 12:32 AM   #1617
awpagan is offline awpagan  Australia
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Quote:
Originally posted by Gooch
Hi Allen

I did that and it didn't help. I wounder if the lazier went out of focus for some reason

Regards

Dave
My cdp played for 2 or three tracks then just stopped.
i had meters and scope on everything trying to find why
thought it was my clock upgrade (loosing sink) or the clocks psu but no.
cleaned laser (dry cotton bud)
replug the cable a few times it played for 4 to 5 tracks

I was starting to think of laser problems too
but

tried moving (bending) cable when playing, no success.

finally put a kink in the cable

no more problem

allan

ps someone mentioned a cap on the transport pcb that dry's out
and gives similar problem to weak laser.
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Old 9th April 2006, 11:39 AM   #1618
poynton is offline poynton  United Kingdom
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Hi.

Run the self test [service mode]
it may be sticking

Andy
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Old 9th April 2006, 06:18 PM   #1619
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Yes it could be some crap on the laser assy, usually caused by the grease going hard.
Clean off the grease and it should be ok.

Brent
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Old 9th April 2006, 06:42 PM   #1620
SimontY is offline SimontY  United Kingdom
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Still trying to fix my display again (which broke not for the first time, lol!)

D852 seemed suspicious so I replaced it with a wire jumper, still not working.

I checked the joints around C854, D851, Q851, C852, D852, C853 and all seems fine.

The front panel receives its +5v (problem last time), this time it's the -24vdc. (should be lower, ~-18v now I replaced D852 with wire.)

If anyone would like to suggest what to do I'd be grateful. I didn't want to ask for help again but I'm a bit stuck now.

The 3.6vac between orange and brown wires measure ok.

The -19.5v isn't right. I'm confused and I don't understand this complex psu arrangement.

The problem is around the 7918 regulator (Q851), it measures:
pin1 - 0
pin2 - -36
pin3 - -26

I don't think this is at all correct, lol!
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