Physical/Functional Diagrams 65
6 DSR2 Data set ready
J2 DEC-423 Comm2/Printer Port Connector
Pin 1 HPTRDTR Data terminal ready
2 HPTRTXD Transmitted data
3 GND Transmit ground
4 PTRCOM Receive ground
5 PTRRXD Received data
6 PTRDSR Data set ready
J3 Keyboard Port Connector
1 HKBTXD Transmitted data
2 GND Ground
3 +12 V
4 KBRXD Received data
CRT/Yoke/Bezel Assembly
J601 CRT Yoke Connector
Pin 1 No connection
2 No connection
3 Vertical yoke
4 Vertical yoke
5 Horizontal yoke
6 Horizontal yoke
Arc Protection Board Assembly
J701 CRT Socket Connector
Pin 1 GRN G1 Grid 1 (green)
2 YEL K2 Cathode (yellow)
3 BRN H1 Heater –12 V (brown)
4 P701 (H2) Heater ground (black)
5 Not used
6 RED G2 Grid 2 (red)
7 BLU G4 Grid 4 (blue)
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