Integra PLA-50FP1 Manual page 103

4. VIDEO block
The external VIDEO signal input is entered from M1001 to M1003, and selected at IC5001 (MM1311BD: SW).
The composite signals of the IC5001 output are applied to the ternary Y/C separator circuit and the 3-line Y/C
separator circuit. The Y/C signal input separated at each Y/C separator circuit is entered in IC5306 to 5309. At
the same time, the composite signals are also entered in IC5306 to 5309 directly.
The Y/C signal output of IC5001 is directly entered in IC5306 to 5309.
When the input signal is of 3.58 NTSC, IC5306 to 5309 operate so that only the output of the ternary Y/C
separator circuit is turned on.
If the input signal is of PAL/PAL_M,/PAL_N, IC5306 to 5309 operate so that only the output of the 3-line Y/C
separator circuit is turned on.
When the input signal is of SECAM, IC5306 to 5309 operate so that the VIDEO composite signal is immediately
turned on.
When the VIDEO mode is for VIDEO3 (S input), there is no dependence on the color system and the circuits
operate so that the Y/C signal output of IC5001 is always turned on.
IC5001
SELEC
TOR
(1) Ternary Y/C separation (For NTSC)
The VIDEO signal output of Q5018 is processed for band limitation at FL5301. It is then processed for the
level and Characteristic F compensation at the AMP (Q5302 to Q5305) in the latter stage. After this com-
pensation, the signal input is entered from Q5328 to Pin 88 of IC5313, with the potential maintained at
1.0Vp-p.
The same signal is processed for sync separation at Q5317 to 5319. This sync signal input is then applied
to Pin 76 of IC5313.
In IC5313, ternary Y/C separation is effected through an interface with IC5312, and the Y signal is output
from Pin 84 of IC5313, and the C signal from Pin 83.
The Y signal is processed for band limitation at FL5304, and the AMP/F characteristic compensation is
carried out at Q5320 to Q5322. The resultant signal input is entered in the SW circuit of IC5307.
The C signal is processed for band limitation at FL5305, and the AMP/F characteristic compensation is
carried out at Q5324 to Q5326. The resultant signal input is entered in the SW circuit of IC5309.
IC5313
C-VIDEO
IC5312
Ternary Y/C separator
circuit
IC5303
3LINE Y/C separator
@
circuit
S-VIDEO
3
IC5306~
Y/C
IC5309
; SW
Y/C
Y/C