Pin 14 is the shift data input necessary for transferring the 8 data bits into the device. W? hen this line is HIGH, a logical ?1
is latched into the device on the rising edge of SCK. When this line is low during the rising edge of SCK, a logical ?0? is
stored instead.
MASK-SW Output
Pin 1 is the MASK-SW relay 16:9-mode(High) or other-mode(Low) control.
INTER-PRO and PAL-NTSC Output
Pin 2 is the INTER-PRO relay Interlace(High) or Progressive(Low) control.
Pin 15 is the PAL-NTSC relay PAL(Low) or NTSC(High) control.
NTSC PAL
60P 50P 100I
Pin 2 (INTER-PRO) Low Low High
Pin 15 (PAL-NTSC) High Low Low
C , R and F-SP-OFF Output
Pin 3 is the Center amplifier control. This output is High when the Center amplifier is in the mute condition.
Pin 4 is the Rear amplifier control. This output is High when the Rear amplifier is in the mute condition.
Pin 7 is the Front amplifier control. This output is High when the Front amplifier is in the mute condition.
P.BLK Output
Pin 15 is the P.BLK relay picture-blanking(High) or active(Low) control.
74HC4066 Analogue Switch (I007)
The 74HC4066 is a 14-pin high speed CMOS quad bilateral switch. It is used primarily for connecting/disconnecting
signals when out of/in the standby state.
Supply/Ground Connections
Pins 14 and 7 are the +5V supply and 0V ground connections respectively. This device is always powered up, even when
then television is in the standby state. Capacitor C043 ensures that the supplies are properly de-coupled.
TXD Connections
Pin 1 is the RS232 Transmit line from the microcontroller (pin 30) which is routed through to pin 2 of I007 when pin13 is
HIGH. Under normal operating conditions (and when the TV is NOT in service or diagnose modes), pin 1 is disconnected
from pin 2 (and pin 12 of scart2). When the TV is in service mode, a PC can be connected to scart 2 to perform diagnostic
functions on the chassis (see separate section on diagnostic protocols for more information).
RXD Connections
Pin 11 is the RS232 receive line from the microcontroller (pin 37) which is routed through to pin 10 when pin 12 is HIGH. |
ACEC
