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

 

S/W PULSE TEST PIN

PATH ADJ. FIXTURE

TEST POINTS

 

 

ENVELOPE TEST PIN

PATH ADJ. FIXTURE

 

 

 

 

MEASURING EQUIPMENT

OSCILLOSCOPE

 

 

 

 

ADJUSTMENT

VR CONTROL

PATH ADJ. FIXTURE

 

 

S/T GUIDE ROLLER

TAPE TRANSPORTING SYSTEM

 

 

 

 

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

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

DRUM ENTRANCE/EXIT (I)

DRUM ENTRANCE/EXIT (II)

33

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Daewoo K3050MECHA service manual Drum Entrance /EXIT See -8,5-9