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Delco radio/cassette repair (with Blaupunkt cassette unit) by fierosound
Started on: 09-04-2020 06:07 PM
Replies: 15 (291 views)
Last post by: fierosound on 10-05-2020 03:02 PM
fierosound
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Report this Post09-04-2020 06:07 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
The Delco UX1 radio cassette I have (Blaupunkt 4-button cassette unit) needs a new optical sensor.



When it doesn't work properly it looks like motor has stopped to the "brains" of the unit.
The unit then thinks it's reached the end of tape and reverses back and forth before ejecting tape.
The part from Blaupunkt is no longer available.

But here is a way to test and repair it.



The Blaupunkt unit schematics/wiring diagrams shown are here:
https://www.radiomuseum.org...r_23_7642888170.html

Of course, Honeywell discontinued part number HCL1395 a couple of years ago, so hard to find.

Reading through the comments under the video, it's apparent that Everlight ITR20904 also works.
https://www.alldatasheet.co...RLIGHT/ITR20904.html

I will give this repair a shot.
Ordered 5 pieces through eBay UK (cheap enough) - and coming from Hong Kong so will take a while.
https://www.ebay.co.uk/itm/333166499856
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[This message has been edited by fierosound (edited 09-26-2020).]

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Report this Post09-04-2020 06:34 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
More DIY on the cassette mechanisms.
http://www.gnttype.org/tech...ges/tape_player.html
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Cassette drive belts...
GM/Delco Autosound Cassette Players 1980 thru mid-1990's made in 4 styles.
(1) Non-auto reverse models use SBX7.4
(2) Auto reverse Fijitsu 3 (Mechanical) Button Mechanisms use SBS8.6
(3) Auto reverse Blaupunkt 4-button Mechanisms use 2 belts: AV-SBS4.9 & AV-SBS9.2
(4)Pioneer (88 up) and Alpine Mechanisms (91 up) have electronic switch buttons SBS9.2
http://kenselectronics.com/lists/belts.htm#Auto

On Blaupunkt units, the Pulse Generator Disk (Delco PN 1226632) is sometimes the culprit.
https://www.ebay.com/itm/De...ng-Disc/124095797548

[This message has been edited by fierosound (edited 09-04-2020).]

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Report this Post09-06-2020 11:57 AM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:

Reading through the comments under the video, it's apparent that Everlight ITR20904 also works.
https://www.alldatasheet.co...RLIGHT/ITR20904.html

I will give this repair a shot.
Ordered 5 pieces through eBay UK (cheap enough) - and coming from Hong Kong so will take a while.
https://www.ebay.co.uk/itm/333166499856
.
.


Seller refunded $ - part not available.

Here's a Delco item that looks like it is the correct part (but shipping to Canada is ridiculous)

GM Delco 90-95 Type D 2000 Series Cassette Deck Light Sensor Assy 1229219 NIB
https://www.ebay.com/itm/GM...19-NIB-/262385753000

[This message has been edited by fierosound (edited 09-24-2020).]

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donuteater306
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Report this Post09-07-2020 08:18 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
Not that it couldn't fail, but i've never had to replace that part. In my experience diagnosing the scenario you described, i've always found a broken drive belt. Push the tape in, the unit switches direction and ejects the tape.
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Report this Post09-07-2020 09:47 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by donuteater306:

Not that it couldn't fail, but i've never had to replace that part. In my experience diagnosing the scenario you described, i've always found a broken drive belt. Push the tape in, the unit switches direction and ejects the tape.


Mine is apart and has no broken belts.
It runs perfectly fine when I shine a light on the sensor assembly.
So the IR light in the thing is shot.

[This message has been edited by fierosound (edited 09-07-2020).]

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Report this Post09-07-2020 10:13 PM Click Here to See the Profile for donuteater306Click Here to Email donuteater306Send a Private Message to donuteater306Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:


Mine is apart and has no broken belts.
It runs perfectly fine when I shine a light on the sensor assembly.
So the IR light in the thing is shot.



Interesting...good catch.
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Report this Post09-07-2020 11:35 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:

Mine is apart and has no broken belts.
It runs perfectly fine when I shine a light on the sensor assembly.
So the IR light in the thing is shot.



 
quote
Originally posted by donuteater306:

Interesting...good catch.


Did the same test as in the YouTube video posted above.

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Report this Post09-24-2020 07:29 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:

Here's a Delco item that looks like it is the correct part (but shipping to Canada is ridiculous)

GM Delco 90-95 Type D 2000 Series Cassette Deck Light Sensor Assy 1229219 NIB
https://www.ebay.com/itm/GM...19-NIB-/262385753000




Delco radio cassette fixed!
Above part is correct for our Delco radios with Blaupunkt cassette units.



New sensor is on right with "ribbon cable" instead of separate wires and is identical.
Repair was done as per video in first post.



Sensor snaps into unit exactly as it should.



Biggest part of job is removing old sensor and fishing new wires through and soldering them.
This new sensor wiring had a clip on the end that wasn't needed and was cut off.

Red-Yellow-Green
becomes
White-Yellow-White/Red stripe (new sensor)



Success! Cassette plays great!
AutoReverse, FF, REW, Eject and Power Off Eject all work properly.



Only now I discover this is one of those radios where the clock won't shut off when power is turned off (thus draining battery).
But I see some people have found a fix for that (replace transistor).

[This message has been edited by fierosound (edited 09-26-2020).]

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Report this Post09-24-2020 11:08 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
Here's another sensor that looks correct (don't know why it's a "barrier" instead of sensor - translation?)
This has individual wires like the original I took out of my unit and would have been easier to install.

Delco Light Barrier 1226616/8 627 000 918 Radio Cassette Deck Part NOS
https://www.ebay.com/itm/De...art-NOS/124095951099

[This message has been edited by fierosound (edited 09-24-2020).]

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Report this Post09-25-2020 06:06 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:

Only now I discover this is one of those radios where the clock won't shut off when power is turned off (thus draining battery).
But I see some people have found a fix for that (replace transistor) .



Getting some NTE232/ECG232 transistors from
https://www.nettyelectronics.com/
Only $2.00 1st Class Mailing in Canada! He's a hobbyist.
One electronics place was US$15.85 for shipping, another wanted a US$10 fee for "paperwork" + shipping.

Here's repair directions with pictures to replace NTE232 transistor to fix "clock always on" problem.
http://garageledlights.com/.../body_radio_fix.html

[This message has been edited by fierosound (edited 09-26-2020).]

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Report this Post09-26-2020 02:04 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post

Delco Radio Service Manuals
(listing starts with year... 1984 etc.)
Place also has some Delco radio parts and new faceplates.

You'd have to look at the cover page of the Manuals for applications and radio Part Number you have - Pontiac P is Fiero
http://elliottscarradio.com...ll-kinds.html?page=6

Service Manual for the radio/cassette in FIRST post of this thread would be for UX1 Part Number 16050352
http://elliottscarradio.com...e-manual-p17419.html

See Radio RPO codes on fender decal and reference that to Pontiac part number.



From P22 Parts Book

1984 (radios had black faceplate and knobs)
Part number, description and RPO code
16033472 Receiver, radio w/Mono UL6
16033592 Receiver, radio w/Mono U63
16030042 Receiver, radio w/Stereo UL1
16030052 Receiver, radio w/Stereo UU7
16032452 Receiver, radio w/Stereo UU6
16034222 Receiver, radio w/Stereo UU9

1985
Part number, description and RPO code
16035102 Receiver, radio w/Stereo UX1
16035122 Receiver, radio w/Stereo UL1 (except Seek/Scan)
16036912 Receiver, radio w/Stereo UT4
16040862 Receiver, radio w/Stereo UM6
16048312 Receiver, radio w/Stereo UM7 with Seek/Scan

1986-88
Part number, description and RPO code
16048312 Receiver, radio w/Stereo UM7 with Seek/Scan
16050352 Receiver, radio w/Stereo UX1
16050362 Receiver, radio w/Stereo UT4
16040862 Receiver, radio w/Stereo UM6

16041072 Speaker, front, 5-1/4" 4-ohm round subwoofer UQ6
16040752 Amplifier, low freq audio - comes with UQ6 option

This is the Service Manual for the Subwoofer Amplifier PN 16040752
http://elliottscarradio.com...-service-manual.html

[This message has been edited by fierosound (edited 09-26-2020).]

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Raydar
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Report this Post09-27-2020 10:30 PM Click Here to See the Profile for RaydarClick Here to Email RaydarSend a Private Message to RaydarEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:


Delco Radio Service Manuals
(listing starts with year... 1984 etc.)
Place also has some Delco radio parts and new faceplates.



Thanks for this. I've been looking for a source for manuals like this for years.
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Report this Post10-05-2020 02:47 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Raydar:

Thanks for this. I've been looking for a source for manuals like this for years.


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Report this Post10-05-2020 02:54 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by fierosound:

Here's repair directions with pictures to replace NTE232 transistor to fix "clock always on" problem.
http://garageledlights.com/.../body_radio_fix.html



I got my transistors ECG232 from netty electronics.

Here it is already soldered in (camera focused on wrong area )



Here's the bottom end before I trimmed off the leads.



One #37 bulb was burned out (there's 4), so I replaced that.



These are the parts I replaced.
The optical sensor assembly for cassette unit to fix ejecting.
Transistor to repair "clock always on" problem.

[This message has been edited by fierosound (edited 10-06-2020).]

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Report this Post10-05-2020 02:57 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post

fierosound

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Member since Nov 1999
Now reassembled. Radio, clock display and cassette work 100% now.



Cassette plays well, Auto-reverse working properly as well as Music Search.

[This message has been edited by fierosound (edited 10-05-2020).]

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Report this Post10-05-2020 03:02 PM Click Here to See the Profile for fierosoundClick Here to visit fierosound's HomePageClick Here to Email fierosoundSend a Private Message to fierosoundEdit/Delete MessageReply w/QuoteDirect Link to This Post

fierosound

14501 posts
Member since Nov 1999
Here's a DIY rundown on Delco radio amp repair.
http://www.howtoalmanac.com...65AudioAmpRepair.htm
.
.
Also...

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