This solution improves audio and video quality by reducing noisy signals.

It requires extensive modification of the motherboard.

PCB thickness 1.2mm, Size 56 x 22 mm

Modification list:

The MOS6560/6561 must be desoldered and socketed.

The following components must be removed from the motherboard:

• R8, R9, R10, R11, R12, R13, R27, R40, R41
• C9, C10, C11, C13, C17
• Q1, Q2
• FB7

C11 must be replaced with a new part number (see the BOM list).

P4 must be replaced with a DIN8 connector (see the BOM list).

Replacing FB10 by a 330ohm resistor cleans up most of the jail bars in the chrominance signal.

Replacing C8 with a 2.2uF ceramic (or a 10uF electrolytic POSCAP, this component is polarized) cleans up the 5V supply considerably. Jail bars in the luminance signal are noticeably reduced.

Connection scheme:

Connect 6560/6561 adapter pin 2 (CHROMA) with a wire to DIN8 pin 6.

Connect 6560/6561 adapter pin 3 (LUMA) with a wire to DIN8 pin 1.

Connect the 6560/6561 CVBS header connector (COMPOSITE) with a wire to DIN8 pin 4.

Connect 6560/6561 adapter pin 19 (AUDIO OUT) with a wire to C11 (positive terminal) and then DIN8 pin 3.

AUDIO IN (DIN8 pin 5) requires a 100K ohm pull-down resistor to ground (DIN8 pin 2).

DIN8 pin 7 is not connected (floating).

DIN8 pin 8 connects to 5V.

DIN8 pin 2 connects to GND.

DIN8 pins 4 and 5 must be separated cutting the trace.