Daewoo K3050MECHA service manual Playback Phase Adjustment See Fig

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F. PLAYBACK PHASE ADJUSTMENT (See Fig. 5-6)

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

		VIDEO OUT	MAIN CIRCUIT BOARD
		VIDEO OUT	MAIN CIRCUIT BOARD

	MEASURING EQUIPMENT	OSCILLOSCOPE

	ADJUSTMENT	VR595 (PG SHIFTER)	MAIN CIRCUIT BOARD

Phase generator (PG) shifter decides the VIDEO HEAD switching point when a TAPE is played back.

In case the Phase generator (PG) shifter isn't correctly tuned, HEAD switching noise or vertical jitter may occur.

a. Connect the PATH ADJ. FIXTURE to PT01 of the MAIN CIRCUIT BOARD.

b. Play the ALIGNMENT TAPE (COLOR BAR SIGNAL OR MONOSCOPE 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(1V/div.) to the VIDEO OUT of the MAIN CIRCUIT BOARD. e. Play back the ALIGNMENT TAPE.

f. Adjust the PG volume for time interval of 6.5H±0.5H between switching pulse and V-sync signal.

Fig. 5-6 PLAYBACK PHASE ADJUSTMENT

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Contents VCR Mechanism Unit Contents 1CHARACTERISTICOFTHEK30-DECKMECHANISM Descriptionofthemechanism2WIREDIAGRAM Wire DiagramConnector PIN Arrangement Assemblingdiagram Assembling Diagram of Deck Assy TOP ViewBottom View Parts Location of Front Loading Assy A. TOP View Front View Cleaning and Lubrication PeriodicmaintenanceandserviceschedulePeriodic Maintenance and Service Schedule Service Schedule for the Major Parts Name Periodic Service TimeJigsandtools List of Jigs and Tools Items Model RemarksSketch of Jigs and Tools Disassembly and Replacement Front Loading Assy Removal See FigDisassemblyofthefrontloadingassy SeeFig.3-2~3-6 Remove one screw holding the Prism Link L. Fig Insert Points TOP Plate DRUMASSY/EARTHBRACKETASSYREMOVALSeeFig.3-7REELBELT,LOADINGRACKASSY,LOADINGASSY,S/TSLANTPOLEASSY A/CHEADASSYREMOVALSeeFig.3-10 L/CBRACKETASSYREMOVALSeeFig.3-11Pinchlever TOTALASSYREMOVALSee -11CAMGEAR,RELAYLEVERANDF/LRACKREMOVALSeeFig.3-11 S/TMAIN&SUBBRAKEASSYREMOVALSeeFig.3-14TENSIONBANDASSYREMOVALSeeFig.3-15,3-16 CAPSTANMOTORREMOVALSeeFig.3-18 IDLERPLATETOTALASSY&S/TREELTABLEREMOVALSeeFig.3-19FEHEADREMOVALSeeFig.3-20 REELGEARTOTALASSY&CONNECTPLATEREMOVALFig.3-21Mechanicaladjustment MECHANICALADJUSTMENTSeeFig.4-1~4-5Triangle Marks Must Meet Each Other Page BACKTENSIONMEASUREMENTSeeFig.4-6~4-7 Datum Hole TapeTensionpole Positionadjustment MechanicalmodeoperatingthevcrwithoutacassettetapeAdjustmentoftapetransportingsystem 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 and Parts List Exploded View of Deck Assy TOP ViewExplodedviewofdeckassybottomview EXPLODEDVIEWOFF/LASSY D0040 Parts List of Deck Total Assy LOC Stock no Part Name Description NtscLOC Stock no Part Name Description Secam Parts List of Drum Price ASS’Y Parts List of Drum Total ASS’Y LOC Stock no Part Name Description Drum ASLOC Stock no Part Name Description Mail G7F00E@web.dwe.co.kr TEL FAX