6803 power supply fuse ratings

FU1 (43 VDC coils) 5 A slow-blow; FU3 (+5 VDC) 6 A slow-blow; FU4 and FU5 (lamp matrix phases A and B) 8 A slow-blow each; FU2 (high voltage in) 3/4 A fast-blow; FU8 (high voltage out) 3/16 A fast-blow, short style; FU6 (backbox GI) and FU7 (playfield GI) 15 A fast-blow. The board is silkscreened with each fuse and value.

Unplug the game before pulling fuses or working on the power supply; the transformer side carries line voltage.

Systems

• Bally 6803

Related tips

• Coil fuse FU1 blows the moment the game is switched on
• Power supply test points and their voltages
• Power supply test point ranges
• No +5 V at TP1 or no 14 V at TP5
• Fuse values to keep for 6803 games
• Which 6803 games have a backbox fuse board
• Where the boards sit in a 6803 backbox
• Rebuild the high-voltage display supply

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)