Black Matrix
Well-known member
K7000 died after cap kit, new flyback, HOT and Regulator replaced
Its been a while since I started this, but I had a K7000 25" monitor that I think was working but dim. So I thought I would rebuild it. Replaced the normal things: flyback, caps, hot and voltage regulator. Upon the repair job, the fuse blew. Replaced it and then the Critical cap looks like it blew out and again the monitor died. So I just got around to pulling the hot(2SD1398) and the Regulator(STR3130). Can someone tell me if they are blown.
1. Hot: middle pin 2 shows continuity with the metal frame. It shows 500 ohms resistance between 1 and 2. It shows 532 ohms between pins 3 and 2.
2. The Regulator: Pin 1 and 4 shows continuity with the metal backing. It shows 2.89 ohm resistance between pins 1 and 2 when the meter is set at 20K. It shows 63.5 ohm resistance between 3 and 4 when the meter is set at 200k. It shows 66.4 ohm between pins 3 and 4 when the meter is set to 200K.
So is my HOT blown. Is my Regulator Blown. And, is it normal for the critical cap to blow after the repairs I have made or is this an indicator of a mistake I might have made.
Lastly, this board has a 1600V critical cap. It also had what I assumed was a cap to expand the width to match the monitor size. But upon inspection. The board was P538 which should be an original 25" monitor pcb. The cap that was soldered onto the bottom of the board was soldered across the connections for the critical cap and was also 1.6KV (1600V). So my question is does anyone have any idea why a second critical cap would be soldered across the original's solder traces. Was this to expand the size or a half assed attempt at some previous repair.
I know something weird is going on with this monitor, but I just don't know what. Any advice would be appreciated.
Its been a while since I started this, but I had a K7000 25" monitor that I think was working but dim. So I thought I would rebuild it. Replaced the normal things: flyback, caps, hot and voltage regulator. Upon the repair job, the fuse blew. Replaced it and then the Critical cap looks like it blew out and again the monitor died. So I just got around to pulling the hot(2SD1398) and the Regulator(STR3130). Can someone tell me if they are blown.
1. Hot: middle pin 2 shows continuity with the metal frame. It shows 500 ohms resistance between 1 and 2. It shows 532 ohms between pins 3 and 2.
2. The Regulator: Pin 1 and 4 shows continuity with the metal backing. It shows 2.89 ohm resistance between pins 1 and 2 when the meter is set at 20K. It shows 63.5 ohm resistance between 3 and 4 when the meter is set at 200k. It shows 66.4 ohm between pins 3 and 4 when the meter is set to 200K.
So is my HOT blown. Is my Regulator Blown. And, is it normal for the critical cap to blow after the repairs I have made or is this an indicator of a mistake I might have made.
Lastly, this board has a 1600V critical cap. It also had what I assumed was a cap to expand the width to match the monitor size. But upon inspection. The board was P538 which should be an original 25" monitor pcb. The cap that was soldered onto the bottom of the board was soldered across the connections for the critical cap and was also 1.6KV (1600V). So my question is does anyone have any idea why a second critical cap would be soldered across the original's solder traces. Was this to expand the size or a half assed attempt at some previous repair.
I know something weird is going on with this monitor, but I just don't know what. Any advice would be appreciated.
