LG Electronics TL-AT130M service manual Front Loading Mechanism

Page 63

MECHANISM TROUBLESHOOTING GUIDE

2. Front Loading Mechanism

A.

Cassette cannot be inserted.

Does the Lever Assembly Switch work?

NO

Is the Lever Assembly Switch Spring damaged or omitted?

NO

Replace or add the Lever Assembly Switch Spring.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Does the CST IN Switch work

 

 

 

 

 

 

 

 

 

 

 

 

normally?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

Is the Vcc of Main P.C.Board

 

 

 

 

 

 

 

 

5V?

 

 

 

 

 

 

Check the syscon circuit.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is the voltage between cassette

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

switch and GND on Main

 

Check the power circuit.

P.C.Board 5V??

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

Replace the CST IN Switch.

Check the Mode switch location and syscon circuit.

B.

Cassette does not eject.

Is there a short circuit between cassette switch and GND on main P.C.Board?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Remove the short circuit part or

Replace the CST IN Switch.

Replace the main P.C.Board.

Does the L/D Motor rotate in reverse?

YES

Does the Lever Assembly Switch work?

YES

Does the Arm Assembly F/L work normally?

YES

Does the Opener Door work?

NO

NO

NO

NO

Check the L/D Motor or Drive IC.

Replace the Lever Assembly Switch.

Replace the Arm Assembly F/L.

Replace the Opener Door.

4-26

Page 62 Page 64
Image 63
Page 62 Page 64
Contents KEY Table of Contents Summary Rear FrontVCR Function Indication Indicator PanelIN/OUT Description Terminal Signal LevelsSummary Critical Parts Replacing Time Table Cabinet & Main Frame Exploded Views Cabinet and Main Frame Section Cabinet & Main Frame Section Parts listPacking & Accessory Section Packing Accessory Section Parts listConnection chart of PG adjustment PG AdjustmentNo 24 Power CircuitSMPS No 5.3 aNo 5.2 a to AVCP, Bias Servo Circuit Video is unstable in PB modePB mode When the drum moter stopCapstan motor stops When the capstan motor stopsNo Video in EE Mode No Video in EE ModeC Circuit Pin 16, 40, 55, 58, 87? Clean the Drum Check the System Circuit IC501 PinIs 5V applied to the IC301 Pin 16, 40, 55, 58, 87? Is the EE signal normal?Audio Circuit No sound in EE Mode No sound in PB ModeNo sound in EE Mode No sound in PB ModeNo sound in REC Mode No sound in REC ModeSYSTEM/KEY Circuit Auto Stop No cassette tape loadingAuto Stop No F.OSD display No Key displayOSD Circuit No OSD displayElectrical Block & Circuit Diagrams Power Block Diagram Power Clrcuit Diagram Audio Block Diagram C Block Diagram V Circuit Diagram Electrical Block & Circuit Diagrams System Block Diagram Electrical Block & Circuit Diagrams System Clrcuit Diagram Jack Clrcuit Diagram KEY-BOARDCLRCUIT Diagram Electrical Printed Circuit Diagrams Jack P.C.BOARD KEY 1 P.C.BOARD KEY 2 P.C.BOARDMechanism Part Fixing Type Top View Bottom ViewDrum Motor Drum Assembly Fig. A-1-1Fig. A-2-4 Plate Top Fig. A-2-1Arm Assembly F/L Fig. A-2-6 Gear Assembly Rack F/L Fig. A-2-5Holder Assembly CST Fig.A-2-2 Bracket Assembly L/D Motor Fig. A-2-4Head F/E Fig. A-3-2 Arm AssemblyCleaner Base Assembly A/C HeadReel S / Reel T Fig. A-4-4 Brake Assembly T Fig. A-4-1Brake Assembly RS Fig. A-4-2 Arm Assembly Tension Fig. A-4-3Arm Assembly Pinch Fig. A-5-3 Opener Lid Fig. A-5-2Lever T/up Fig. A-5-4 Arm T/up Fig. A-5-5 Lever F/R Fig. A-6-3 Brake Assembly CapstanJust lift the Plate Slider up Gear Sector Fig. A-7-3Lever Tension Fig. A-7-5 Lever Spring Fig. A-7-6Base Assembly P2 Fig. A-8-3/ Base Assembly P3 Fig. A-8-4 Gear Assembly P2 Fig. A-8-1/ Gear Assembly P3 Fig. A-8-2Base Tension Base Loading Base Loading Fig. A-9-1 Arm Assembly Idler Fig. A-9-3Arm Assembly Idler Base Tension Fig. A-9-2Deck Mechanism Adjustment Fig. C-1 Mechanism Alignment Position CheckTorque Gauge 600g.cm ATG Cassette Torque Meter SRK-VHT-303 Checking TorqueTest Equipment/ Fixture Test Conditions Mechanism ConditionGuide Roller Height Adjustment Head Base Audio/Control A/C Head AdjustmentAdjustment Procedure/Diagrams Head Assembly1KHZ 7KHZ Value AdjustmentPrecise Adjustment Azimuth adjustment Adjustment Procedure Adjustment DiagramCheck the Tape Travel after Reassembling Deck Assembly Adjustment after Replacing Drum Assembly Video HeadsCheck before starting repairs Cleaning Required MaintenanceScheduled Maintenance Maintenance ProcedureGreasing Chassis Bottom Chassis TopGear Sector Gear Cam Base Loading Gear Drive Lever, F/R, Base, Tension Gear AY, P2 & P3Base, Tension Mechanism Troubleshooting Guide Auto Stop PLAY/CUE/REV Is the Belt ok? NonoFront Loading Mechanism Cassette does not load Exploded Views Moving Mechanism A11 NSP Not Service Part RUN DateParts Section Screw Description SpecificationAssembly Section Remarks LOCA.NO Description Specification RemarksCapacitor LOCA.NO Description Specification Remark BATTERY,LITHIUMElectrecal section BuzzerLOCA.NO Description Specification Remark NP0 TS Diode CoilHolder DigitronFilter FuseR121 0RD1800F608 R3G6 0RD1800F608 R553 0RD2200F608 R610 0RD2701F608 RESISTOR,DRAWING LOCA.NO Description SpecificationRemote Controller Receiver Remark SwitchZener Diode TransformerVaristor TAL
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