UPDATE: I was digging in the wrong place. B+ is fine, but still no picture.
Original post follows:
Very weird issue here... I've rebuilt the deflection and HV boards for a WG19K6102 pulled from a Black Widow. Work included:
Deflection:
LV2K installation (twice: on the first one voltages tested fine but the LEDs didn't light, assumption now is the first card just has bad LED installation but I left the second one in).
Replacement of R801 (looked burned), R811 and R810 (measured out of spec), all caps and transistors in spot killer circuit.
Replaced D702 and D602, moved to solder side.
Removed solder side diode mods (see the old 6100 FAQ).
HV:
Replaced HV adjustment pot, all zener diodes, all electrolytic caps and the following resistors due to being burned or testing out of spec: R920, R904, R905, R922, R902, R929, R932, R933.
Moved R907 to solder side.
Reflowed all connector pins on deflection and HV boards. All frame transistors (had to replace a couple) and deflection transistors check out when tested.
Rebuilt per @andrewb's guide. Everything looked good up until the very last steps: HV at the anode is a steady 19.5k dcv, LV measures good at both connection points on the deflection board, there is neck glow and chatter. Spot killer appears to work. But, testing with a known good Tempest board: no picture. And even weirder (although it does explain the no picture): B+ measured at the P323 neck board is stuck at 25v.
Next thing I'll test will be the wire connectivity from the HV to the neck board, but the fact that I'm getting a reading (even if it's not correct) at B+ suggests that's not likely to be the issue.
Would appreciate any suggestions.
Original post follows:
Very weird issue here... I've rebuilt the deflection and HV boards for a WG19K6102 pulled from a Black Widow. Work included:
Deflection:
LV2K installation (twice: on the first one voltages tested fine but the LEDs didn't light, assumption now is the first card just has bad LED installation but I left the second one in).
Replacement of R801 (looked burned), R811 and R810 (measured out of spec), all caps and transistors in spot killer circuit.
Replaced D702 and D602, moved to solder side.
Removed solder side diode mods (see the old 6100 FAQ).
HV:
Replaced HV adjustment pot, all zener diodes, all electrolytic caps and the following resistors due to being burned or testing out of spec: R920, R904, R905, R922, R902, R929, R932, R933.
Moved R907 to solder side.
Reflowed all connector pins on deflection and HV boards. All frame transistors (had to replace a couple) and deflection transistors check out when tested.
Rebuilt per @andrewb's guide. Everything looked good up until the very last steps: HV at the anode is a steady 19.5k dcv, LV measures good at both connection points on the deflection board, there is neck glow and chatter. Spot killer appears to work. But, testing with a known good Tempest board: no picture. And even weirder (although it does explain the no picture): B+ measured at the P323 neck board is stuck at 25v.
Next thing I'll test will be the wire connectivity from the HV to the neck board, but the fact that I'm getting a reading (even if it's not correct) at B+ suggests that's not likely to be the issue.
Would appreciate any suggestions.
Last edited:



