akira CT-21XF9, Service Manual

Page: 37 / 77

37
Model No: CT-21XF9A
Version 1.0
Digital multimeter (GDM8145)
Resistance for GND
(Rx200KÙ)
Pin Symbol Function Quiescent
state (V) Dynamic
state (V)
Red pen
measure
Black
pen
measure
20 ID SW The switch pin for selecting
the ID detection mode. H+V
: connected to Vc-c
Auto seaeh : opened
H : connected to GND
5.02 2.50 18.3 18.3
21 SECAM ID
In / Out
The interface pin to the
main processor TB 1231.
This input/output interface
pin sinks 7701xA of current
when the TA1275Z
recognizes the SECAM
input signal turns the
internal/external switch by
the input DC voltage.
Internal : gnd~2.5V
External : 2.5V~ Vc-c
1.78 3.75 1.0 1.0