Home |
Search |
Today's Posts |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
Hi,
I need to ID a diode. It is in the regulation circuit of an old 28v Power Supply. http://wallyheider.com/wordpress/201...udio-recorder/ Markings are Z104 (twice) and CDC. There are other diodes on the board in the 1N4001 case style/size, but this one is slightly longer and thinner and has a black shiny coating, not matt. There is a schematic on the Interweb for this machine, but this supply does not correspond to that circuit. Cheers, Gareth. |
#3
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
On 1/12/2017 7:41 AM, wrote:
Hi, I need to ID a diode. It is in the regulation circuit of an old 28v Power Supply. http://wallyheider.com/wordpress/201...udio-recorder/ Markings are Z104 (twice) and CDC. There are other diodes on the board in the 1N4001 case style/size, but this one is slightly longer and thinner and has a black shiny coating, not matt. There is a schematic on the Interweb for this machine, but this supply does not correspond to that circuit. Cheers, Gareth. The old Lambda power supplies used a FBM-Z104 6.2V Reference diode. Make sense? |
#4
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
On Thursday, January 12, 2017 at 2:20:12 PM UTC, JC wrote:
On 1/12/2017 7:41 AM, wrote: Hi, I need to ID a diode. It is in the regulation circuit of an old 28v Power Supply. http://wallyheider.com/wordpress/201...udio-recorder/ Markings are Z104 (twice) and CDC. There are other diodes on the board in the 1N4001 case style/size, but this one is slightly longer and thinner and has a black shiny coating, not matt. There is a schematic on the Interweb for this machine, but this supply does not correspond to that circuit. Cheers, Gareth. The old Lambda power supplies used a FBM-Z104 6.2V Reference diode. Make sense? That makes perfect sense. This is a Lambda supply, the diode is almost certainly a Zener. Thanks very much! Gareth. |
#5
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
On Thursday, January 12, 2017 at 2:20:12 PM UTC, JC wrote:
On 1/12/2017 7:41 AM, wrote: Hi, I need to ID a diode. It is in the regulation circuit of an old 28v Power Supply. http://wallyheider.com/wordpress/201...udio-recorder/ Markings are Z104 (twice) and CDC. There are other diodes on the board in the 1N4001 case style/size, but this one is slightly longer and thinner and has a black shiny coating, not matt. There is a schematic on the Interweb for this machine, but this supply does not correspond to that circuit. Cheers, Gareth. The old Lambda power supplies used a FBM-Z104 6.2V Reference diode. Make sense? Supply still not working with new 6.2v zener. Do you know of any schematics for this? The PCB is Lambda HAL-01-006. Cheers, Gareth. |
#6
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
On Thursday, January 12, 2017 at 4:03:03 PM UTC, wrote:
On Thursday, January 12, 2017 at 2:20:12 PM UTC, JC wrote: On 1/12/2017 7:41 AM, wrote: Hi, I need to ID a diode. It is in the regulation circuit of an old 28v Power Supply. http://wallyheider.com/wordpress/201...udio-recorder/ Markings are Z104 (twice) and CDC. There are other diodes on the board in the 1N4001 case style/size, but this one is slightly longer and thinner and has a black shiny coating, not matt. There is a schematic on the Interweb for this machine, but this supply does not correspond to that circuit. Cheers, Gareth. The old Lambda power supplies used a FBM-Z104 6.2V Reference diode. Make sense? Supply still not working with new 6.2v zener. Do you know of any schematics for this? The PCB is Lambda HAL-01-006. Cheers, Gareth. Oops, I'm an eejit, there are 2 Remote Sense connections on the PSU output that are required to be connected, the PSU is now running fine. Cheers, Gareth. |
#7
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
On Thursday, January 12, 2017 at 11:03:03 AM UTC-5, wrote:
Supply still not working with new 6.2v zener. Do you know of any schematics for this? The PCB is Lambda HAL-01-006. First, a possible source for help would be: http://www.us.tdk-lambda.com/hp/service.htm Then, it has been my experience that when the Zener goes, it is only after much else has gone. Test _ALL_ the diodes (they are cheap enough anyway), and _ALL_ the caps. Without delving any deeper, is this a solid-state supply? If so, I would be checking the VR chips throughout. Peter Wieck Melrose Park, PA |
#8
Posted to sci.electronics.repair
|
|||
|
|||
Diode ID
wrote in message ... On Thursday, January 12, 2017 at 11:03:03 AM UTC-5, wrote: Supply still not working with new 6.2v zener. Do you know of any schematics for this? The PCB is Lambda HAL-01-006. First, a possible source for help would be: http://www.us.tdk-lambda.com/hp/service.htm Then, it has been my experience that when the Zener goes, it is only after much else has gone. Test _ALL_ the diodes (they are cheap enough anyway), and _ALL_ the caps. Without delving any deeper, is this a solid-state supply? If so, I would be checking the VR chips throughout. Peter Wieck Melrose Park, PA This PSU is all discrete, the only problem was the Zener, fortunately. There is a fair amount of circuitry here. Thanks to all who replied, Gareth. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
HDD TVS diode FAQ | Electronics Repair | |||
Diode help | Electronics Repair | |||
Diode ID help | Electronics Repair | |||
Would appreciate help ID'ing a Diode | Electronics Repair | |||
Diode I.D. | Electronics Repair |