Exsample:Mac LC video connector pinouts: Pin Number Signal Name 1 RED.GND 2 RED.VID 3,15 /CSYNC or /HSYNC 4 SENSE0 5 GRN.VID 6 GRN.GND 7 SENSE1 8 n.c. 9 BLU.VID 10 SENSE2 11 C&VSYNC;.GND 12 /VSYNC 13 BLU.GND 14 HSYNC.GND Shell CHASSIS.GND
shown NO.10 to 14 as mini connect to coax line for rear sealded box area. (green).
NO.5,7 to J59,J27 are power SW NO.28 to 34 as connect to internal Plain Talk microphone.(yellow)
ColorClassic standerd 512 x 384 mode is NO4 and 10(DB15) to ground. What same line this connecter...
Sense 0,1,2
Perhaps connect 0,2 to ground or all opened. Require 480x640 mode a sense 0 to ground.
Display Pixels Hz Pins grounded Apple Hi Res RGB 480 x 640 67 Hz 4 Apple 12" RGB 512 x 384 67 Hz 4, 10 Apple IIe RGB 560 x 384 67 Hz VGA 480 x 640 10 RS-170A (interlaced) 480 x 640 60 Hz 4, 7
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The Macintosh LC does not supply vertical synchronization with the Green video signal (pin~5). The vertical synchronization signal is supplied on pin 12.
The Macintosh LC requires that pin 4 (SENSE0) be connected to Ground to signal the connection of a 640 x 480 monitor. The Macintosh LC requires that pin 4 and 10 (SENSE0 and SENSE2) be connected to Ground to signal the connection of a 512 x 384 monitor (i.e., the Macintosh 12" RGB Display). The Macintosh LC requires that pin 10 (SENSE2) be connected to Ground to signal the connection of a VGA monitor. Pin 7 (SENSE1) is grounded in the Macintosh LC.
Change to 480 x 640 mode: replace R78 chip to R79!
Internal audio out put are left-channl only, but a may be able stereo!