-49-
Control Port Functions
IC1501 2ISCL0_5V
3 I/O SDA0_5V
M62398 4OFAN_CONT1 Fan control 1 FN901 (Exhaust Fan for Power/Ballast)
5OFAN_CONT2 Fan control 2 FN902 (Intake Fan for PBS)
6OFAN_CONT3 Fan control 3 FN903 (Exhaust Fan for Lamp)
7OFAN_CONT4 Fan control 4 FN904, FN905 (Intake fan for LCD Panel)
8ONot used
9ONot used
14 O R_V1 Video signal reference voltage R (–) side
15 O G_V1 Video signal reference voltage G (–) side
16 O B_V1 Video signal reference voltage B (–) side
17 O REF_R DAC output full scale setting R Reference adjustment (black to black)
18 O REF_G DAC output full scale setting G
19 O REF_B DAC output full scale setting B
20 - Vcc 12V
21 - Vdd 5V
22 I CS2 Slave address setting port 2 Vdd
23 I CS1 Slave address setting port 1 Vdd
24 I CS0 Slave address setting port 0 Vdd
IC Ref. No. Pin I/O Signal Name Function Note
● IIC Bus D/A Converter
1VDD Power Supply +5V -
2 GP5/T1CKI TMR1_CLK Clock Input I
3 GP4 TXL Power switch signal Low Wattage = L O
4 GP3 RXL Lamp Status Signal I
5 GP2/T0CKI LAMP_PWM APL Level Input I
6 GP1 SCEL Lamp ON/OFF Control Lamp ON = L O
7 GP0 LAMP_ERR Lamp Error Output Lamp Error = H O
8 GND - -
Pin No. Name Function Note Polarity I/O
● Lamp Control CPU (IC4841, PIC12F675)
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