Sony Glasstron PLM-S700E, Service Manual

Page: 63 / 94

4-90
Pin No. Pin Name I/O Function
53 MODE2 O
Mode changes signal output to the L & R LCD units
54 MODE1 O
Mode changes signal output to the L & R LCD units
55 HST O Horizontal start pulse output to the L & R LCD units
56 HCK1 O
Horizontal clock 1 pulse output to the L & R LCD units
57 HCK2 O
Horizontal clock 2 pulse output to the L & R LCD units
58 BLK O Blanking pulse output to the L & R LCD units (positive polarity)
59 CLR O
Clear pulse output to the L & R LCD units (positive polarity)
60 ENB O
Enable pulse output to the L & R LCD units (negative polarity)
61 VCK O Vertical clock pulse output to the L & R LCD units
62 VST O
Vertical start pulse output to the L & R LCD units
63 VSS —
Ground terminal
64 TST7 I Input terminal for the test Not used (open)
65 PCG O
PCG pulse output to the gamma control IC (IC201) and L & R LCD units (positive polarity)
66 TST8 I
Input terminal for the test Not used (open)
67 DWN O Up-down inversion distinguishing signal output to the L & R LCD units “L”: up, “H”: down
68 RSTR O
Reset read signal output to the line memory (IC1104 to 1106)
(for high speed line buffer/negative polarity)
69 RCK O
Read clock signal output to the video RGB A/D converter (IC1101 to 1103), line memory
(IC1104 to 1106) and video RGB D/A converter (IC1201) (for high speed line buffer)
70 RSTW O
Reset write signal output to the line memory (IC1104 to 1106)
(for high speed line buffer/negative polarity)
71 WCK O
Write clock signal output to the video RGB A/D converter (IC1101 to 1103) and line memory
(IC1104 to 1106) (for high speed line buffer)
72 VSS —
Ground terminal
73 VDD — Power supply terminal (+5V)
74 XCLR I
System clear signal input from the system controller (IC501) “L”: all clear
75 PRE I
Input terminal for the presetting (“L”: preset to Macintosh 16 mode) Fixed at “H” in this set
76, 77 TST9, TST10 I Input terminal for the test Not used (open)
78 FLDI I
Field distinguishing signal input terminal In this set, the signal from FLDO
&ª
pin is input
79 FLDO O
Field distinguishing signal output terminal
80 HD O Horizontal drive pulse output terminal (positive polarity)