Service manual

CPU Assembly Connectors
A-2
The connector listed in this table is shared by the keyboard and the preview screen. Pins
1–11 serve the keyboard, while pins 12–26 serve the keyboard display. All of the signal
lines (except ground) are filtered before they pass through this connector.
Table A-1 Control Board J201 to M1770A/71A Keyboard and Keyboard Display (LCD) Connector J101
Pin Signal Pin Signal Pin Signal
1 ground 15 ROWSA_1 28 CP
2 KEYIN7 16 ROWSD_0 29 ground
3 ROWSG_0 17 ground 30 KEYIN0
4 ROWSB_0 18 KEYIN4 31 LOAD
5 ground 19 ROWSD_1 32 DF
6 KEYIN1 20 DD0 33 YD
7 ROWSC_1 21 ground 34 ONSTBY
8 ROWSA_0 22 KEYIN5 35 ACONLED
9 ground 23 DD1 36 DOFF
10 KEYIN2 24 DD2 37 VCCV
11ROWSB_125ground 38+5KBD
12ROWSC_026KEYIN6 39+5KBD
13 ground 27 DD3 40 ground
14 KEYIN3
NOTE