Daewoo K3050MECHA service manual Review ¤APLAY See Fig

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I. REVIEW ¤APLAY (See Fig. 5-10)

		S/W PULSE TEST PIN	PATH ADJ. FIXTURE
	TEST POINTS	S/W PULSE TEST PIN	PATH ADJ. FIXTURE

		ENVELOPE 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 TRANSPORTIN SYSTEM
		S/T GUIDE ROLLER	TAPE TRANSPORTIN SYSTEM

a. Connect the PATH ADJ. FIXTURE to PT01 of the MAIN CIRCUIT BOARD. b. Play back the ALIGNMENT TAPE (SP, 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. Adjust the VR CONTROL of the PATH ADJ. FIXTURE to the center to obtain the maximum envelope signal of the ALIGNMENT TAPE.

f. After operating the VCR in the REVIEW MODE about 15 secs, change the REVIEW MODE to the

PLAY BACK MODE.

g. Change operation mode from REVIEW MODE to PLAY MODE and then make sure that the envelope waveform is restored to the maximum condition within 3 seconds.

h. If the requirement is not satisfied, make sure that the TAPE runs normal at the lower part of the T GUIDE POST. Then adjust the S/T GUIDE ROLLER precisely.

WAVEFORM

PICTURE

Fig. 5-10 CHECK OF TRANSITIONAL OPERATION (FROM REVIEW WAVEFORM TO PLAY WAVEFORM)

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Image 35

Contents VCR Mechanism Unit Contents Descriptionofthemechanism 1CHARACTERISTICOFTHEK30-DECKMECHANISMWire Diagram 2WIREDIAGRAMConnector PIN Arrangement Assembling Diagram of Deck Assy TOP View AssemblingdiagramBottom View Parts Location of Front Loading Assy A. TOP View Front View Cleaning and Lubrication PeriodicmaintenanceandserviceschedulePeriodic Maintenance and Service Schedule Name Periodic Service Time Service Schedule for the Major PartsList of Jigs and Tools Items Model Remarks JigsandtoolsSketch of Jigs and Tools Front Loading Assy Removal See Fig Disassembly and ReplacementDisassemblyofthefrontloadingassy SeeFig.3-2~3-6 Remove one screw holding the Prism Link L. Fig DRUMASSY/EARTHBRACKETASSYREMOVALSeeFig.3-7 Insert Points TOP PlateREELBELT,LOADINGRACKASSY,LOADINGASSY,S/TSLANTPOLEASSY TOTALASSYREMOVALSee -11 A/CHEADASSYREMOVALSeeFig.3-10L/CBRACKETASSYREMOVALSeeFig.3-11 PinchleverS/TMAIN&SUBBRAKEASSYREMOVALSeeFig.3-14 CAMGEAR,RELAYLEVERANDF/LRACKREMOVALSeeFig.3-11TENSIONBANDASSYREMOVALSeeFig.3-15,3-16 IDLERPLATETOTALASSY&S/TREELTABLEREMOVALSeeFig.3-19 CAPSTANMOTORREMOVALSeeFig.3-18REELGEARTOTALASSY&CONNECTPLATEREMOVALFig.3-21 FEHEADREMOVALSeeFig.3-20MECHANICALADJUSTMENTSeeFig.4-1~4-5 MechanicaladjustmentTriangle Marks Must Meet Each Other Page Datum Hole Tape BACKTENSIONMEASUREMENTSeeFig.4-6~4-7Mechanicalmodeoperatingthevcrwithoutacassettetape Tensionpole PositionadjustmentAdjustmentoftapetransportingsystem Adjustment of the S/T Guide Roller Adjustment of the A/C Head Assy Tilt Adjustment Position Adjustment Playback Phase Adjustment See Fig Linearity Adjustment Drum Entrance /EXIT See -8,5-9 Review ¤APLAY See Fig Audio Output A/C Head Tilt & Height Adjustment Position See Fig Exploded View of Deck Assy TOP View Exploded View and Parts ListExplodedviewofdeckassybottomview EXPLODEDVIEWOFF/LASSY D0040 LOC Stock no Part Name Description Ntsc Parts List of Deck Total AssyLOC Stock no Part Name Description Secam Parts List of Drum Price ASS’Y LOC Stock no Part Name Description Drum AS Parts List of Drum Total ASS’YLOC Stock no Part Name Description Mail G7F00E@web.dwe.co.kr TEL FAX