Sony VX-14MW1U Service Manual page 68

Tv / vcr combination

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

TEST POINTS

MEASURING EQUIPMENT

ADJUSTMENT

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.

DRUM ENTRANCE

DRUM EXIT

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

DRUM ENTRANCE/EXIT (I)

S/W PULSE TEST PIN

ENVELOPE TEST PIN

OSCILLOSCOPE

VR CONTROL

S/T GUIDE ROLLER

QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ

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

PATH ADJ. FIXTURE

TAPE TRANSPORTING SYSTEM

QQQQQQQQQQQQQQQQQQQQQQQQQQQQQQ

DRUM ENTRANCE/EXIT (II)

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