Hitachi Dy-32v 110 Svc for 36UX01S television

[Not Really Me]

Can anyone identify this part?
Fool that I might be, I'm trying to repair my Hitachi 36UX01S television. I
followed the troubleshooting charts for no Vertical drive and it tells me
that I should have 28V at the input to the drive chip. It has zero, so it
lists the drive chip, a diode (half wave rect off the transformer), or "E601
open" as the problem. E601 on the schematic is a rectangle with a circle on
each end and the value 1000. I don't recognize the symbol.

The kicker is that I can find it listed from parts suppliers on the net, but
it is $93, which strikes me as insane for a 2 pin part the size of a film
resistor.

Scott

 

[Franc Zabkar]

Can anyone identify this part?
Fool that I might be, I'm trying to repair my Hitachi 36UX01S television. I
followed the troubleshooting charts for no Vertical drive and it tells me
that I should have 28V at the input to the drive chip. It has zero, so it
lists the drive chip, a diode (half wave rect off the transformer), or "E601
open" as the problem. E601 on the schematic is a rectangle with a circle on
each end and the value 1000. I don't recognize the symbol.

The kicker is that I can find it listed from parts suppliers on the net, but
it is $93, which strikes me as insane for a 2 pin part the size of a film
resistor.

Scott

The supply to the vertical output chip is usually taken from a winding
on the flyback transformer. The pulse is rectified by a diode and the
rail is protected by a low value fusible resistor, usually only a few
ohms. I'm guessing that the "DY" in the part number/description refers
to Deflection Yoke, "32V" may refer to the voltage rating (?) or the
size of the CRT in inches (?), and 110 may be the size of CRT in
degrees.

In fact the parts list in the service manual has three occurrences of
E601:

E601 BY00821 DY-32V 110 SVC
E601 AZ00102M PROTECTOR(CRXT491001)

and

E601 BY00821 Deflection Yoke Assy.

So it looks like two items have erroneously been given the same
circuit designation.

You should be looking for a protector device, ie the AZ00102M which
sells for $2.95, not a BY00821 deflection yoke costing $93. A low
value fusible resistor should do the job. I'd use circuits for
similarly sized CRTs (36") as a guide. The "1000" in the circuit
diagram may be a current rating in mA. You can use an ordinary 1A fuse
while troubleshooting to verify that the IC and yoke are OK.

- Franc Zabkar

 

[Not Really Me]

The supply to the vertical output chip is usually taken from a winding
on the flyback transformer. The pulse is rectified by a diode and the
rail is protected by a low value fusible resistor, usually only a few
ohms. I'm guessing that the "DY" in the part number/description refers
to Deflection Yoke, "32V" may refer to the voltage rating (?) or the
size of the CRT in inches (?), and 110 may be the size of CRT in
degrees.

In fact the parts list in the service manual has three occurrences of
E601:

E601 BY00821 DY-32V 110 SVC
E601 AZ00102M PROTECTOR(CRXT491001)

and

E601 BY00821 Deflection Yoke Assy.

So it looks like two items have erroneously been given the same
circuit designation.

You should be looking for a protector device, ie the AZ00102M which
sells for $2.95, not a BY00821 deflection yoke costing $93. A low
value fusible resistor should do the job. I'd use circuits for
similarly sized CRTs (36") as a guide. The "1000" in the circuit
diagram may be a current rating in mA. You can use an ordinary 1A fuse
while troubleshooting to verify that the IC and yoke are OK.

- Franc Zabkar

Thanks so much Frank. I knew it showed up multiple times but didn't see the
protector description. That makes a lot more sense.

Scott

 

[Not Really Me]

The supply to the vertical output chip is usually taken from a winding
on the flyback transformer. The pulse is rectified by a diode and the
rail is protected by a low value fusible resistor, usually only a few
ohms. I'm guessing that the "DY" in the part number/description refers
to Deflection Yoke, "32V" may refer to the voltage rating (?) or the
size of the CRT in inches (?), and 110 may be the size of CRT in
degrees.

In fact the parts list in the service manual has three occurrences of
E601:

E601 BY00821 DY-32V 110 SVC
E601 AZ00102M PROTECTOR(CRXT491001)

and

E601 BY00821 Deflection Yoke Assy.

So it looks like two items have erroneously been given the same
circuit designation.

You should be looking for a protector device, ie the AZ00102M which
sells for $2.95, not a BY00821 deflection yoke costing $93. A low
value fusible resistor should do the job. I'd use circuits for
similarly sized CRTs (36") as a guide. The "1000" in the circuit
diagram may be a current rating in mA. You can use an ordinary 1A fuse
while troubleshooting to verify that the IC and yoke are OK.

- Franc Zabkar

No fuse handy, but a 5 ohm resistor clipped across the device makes the
vertical drive work. I'll order and replace the part. Thanks to you I guess
I'll keep this out of the recycling for another while.

Scott