H. drum entrance /exit (see fig. 5-8, 5-9) – Daewoo K3050MECHA User Manual

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H. DRUM ENTRANCE /EXIT (See Fig. 5-8, 5-9)

a. Connect the PATH ADJ. FIXTURE to PT01 the MAIN CIRCUIT BOARD.
b. Play back the ALIGNMENT TAPE (COLOR BAR SIGNAL).
c. Connect the channel-1 scope probe to the S/W PULSE TEST PIN of the PATH ADJ. FIXTURE.
d. Connect the channel-2 scope probe to the ENVELOPE TEST PIN of the PATH ADJ. FIXTURE.
e. When turning the VR CONTROL of the PATH ADJ. FIXTURE clockwise or counter-clockwisw, affirm

that the envelope thickness changes uniformly.

f. If the envelope is not uniform and regular, adjust the S/T GUIDE ROLLER.

TEST POINTS

S/W PULSE TEST PIN

PATH ADJ. FIXTURE

ENVELOPE TEST PIN

PATH ADJ. FIXTURE

MEASURING EQUIPMENT

OSCILLOSCOPE

ADJUSTMENT

VR CONTROL

PATH ADJ. FIXTURE

S/T GUIDE ROLLER

TAPE TRANSPORTING SYSTEM

DRUM ENTRANCE

DRUM EXIT

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Fig. 5-8 FINE TUNING OF THE ENVELOPE AT THE

DRUM ENTRANCE/EXIT (I)

Fig.5-9 FINE TUNING OF THE ENVELOPE AT THE

DRUM ENTRANCE/EXIT (II)