Hitachi I-28 Service Manual page 6

+B(IL4V) +B
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PREVIDEO
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BLANKING @
INPUT (4)
NOISE
ELIMINATOR
SEPARATOB
Moreover, from HA1167, sound signals are also separated
from terminal (6). Terminal is the emitter follower
output becoming low output impedance, sufficiently oper-
ating the sound circuit, picture circuit, and synchronous
detached circuit.
Sound trap coil connect to terminal which resonate
with 4.5 MHz. The sound signal of 4.5 MHz is obtained
from the secondary side of the SIF input transformer, and
the picture signal from which the sound signal is eliminated
is obtained from the output side of the trap.
+B
SYNC.
OUTPUT
Fig. 6