Service manual

27
LC-20VM2
LC-121M2E
LC-150M2E
Terminal Symbol I/O Level Buffer Type Function
No. PU/PD[kΩ]
58 SLA0 I TTL 5V withstand I
2
C bus slave address selection input
voltage (L: B8/B9h, H: BA/BBh)
PD:50
59 SCL I Schmitt 5V withstand I
2
C bus clock input
voltage (Connect to system’s SCL line)
60 SDA I/O Schmitt 5mA/5V I
2
C bus data input/output
Not Open drain withstand voltage (Connect to system’s SDA line)
61 ST0 O TTL 1mA Internal signal monitor output
62 ST1 O TTL 1mA Internal signal monitor output
63 NSTD O TTL 1mA Nonstandard detection monitor output
(L: Standard decision H: Nonstandard decision)
65, 66 DYCO0-DYCO1 I/O TTL 1mA/5V EXADINS=0: Digital YC signal alternate output
(LSB)-(MSB) withstand voltage (lower 2-bit)
EXADINS=1: Test input
(GND connection through resister)
67-74 DYCO2-DYCO9 I/O TTL 1mA/5V EXADINS=0: Digital YC signal alternate output
(LSB)-(MSB) withstand voltage (upper 8-bit)
EXADINS=1: 8-bit data input for external
Y-ADC
75 ALTF O TTL 1mA EXADINS=0: Digital YC signal alternate flag
output (L:Y, H:C)
EXADINS=1: 4fsc clock output for external
Y-ADC
76 CSI I Schmitt 5V withstand Composite sink input
voltage (Active low)
PD:50
77 TEST I TTL 5V withstand Test terminal for IC selection
voltage (L: Normal operation, H: Test mode)
PD:50 (GND connection)
78 LINE I TTL 5V withstand Forced line process selection input
voltage (L: Normal process, H: Forced line process)
PD:50
79 KIL I TTL 5V withstand External killer input
voltage (L: Normal process, H: Forced YC separation
PD:50 stop)
81 AVDD - - Y-DAC, C-DAC power supply
82 CBPC O Analog C-DAC phase compensation output
83 ACO O Analog C-DAC analog C signal output
84 AYO O Analog Y-DAC analog Y signal output
85 CBPY O Analog Y-DAC phase compensation output
86 AGND - - Y-DAC, C-DAC ground
87 AGND - - Y-ADC ground
88 AYI I Analog Y-ADC analog composite signal /Y signal input
89 VCLY O Analog Y-ADC clamp potential output
90 VRBY O Analog Y-ADC bottom reference voltage output
91 VRTY O Analog Y-ADC top reference voltage output
92 AVDD - - Y-ADC, C-ADC power supply
93 AVDD - - Y-ADC, C-ADC power supply
94 VRTC O Analog C-ADC top reference voltage output