Capstan motor stops | LG Electronics TL-AT130M manual

SECTION3 ELECTRICAL

ELECTRICAL TROUBLESHOOTING GUIDE

(3) Capstan motor stops

When the capstan motor stops

Is it 12VA at PMC01 Pin2?

YES

Is there 2.8V at PMC01 Pin9?

NO

NO

Check Power circuit

Does PWM signal appear at IC501 Pin 33?

YESYES

Check the Ass’y between PMC01

and Capstan motor

YES

NO

Aren’t pattern or componets between

IC501 Pin33 and PMC01 Pin9 short?

Does CFG signal appear at PMC01 Pin1?

YES

NO

Check the Ass’y of Capstan motor

Check CFG signal appear at IC501

Pin67?

YES

Does Capstan PWM signal appear

at IC501 Pin33?

YES

Aren’t pattern or componets between

IC501 Pin33 and PMC01 Pin1 short?

NO

NO

Aren’t pattern or componets between IC501 Pin67 and

PMC01 Pin1 short?

Replace IC501

3-5

Image 15

LG Electronics TL-AT130M service manual Capstan motor stops, When the capstan motor stops

Contents

KEY Table of Contents Summary Rear Front VCR Function Indication Indicator Panel IN/OUT Description Terminal Signal Levels Summary Critical Parts Replacing Time Table Cabinet & Main Frame Exploded Views Cabinet and Main Frame Section Cabinet & Main Frame Section Parts list Packing & Accessory Section Packing Accessory Section Parts list Connection chart of PG adjustment PG Adjustment No 24 Power CircuitSMPS No 5.3 a No 5.2 a to AVCP, Bias Servo Circuit Video is unstable in PB modePB mode When the drum moter stop Capstan motor stops When the capstan motor stops No Video in EE Mode No Video in EE ModeC Circuit Pin 16, 40, 55, 58, 87? Clean the Drum Check the System Circuit IC501 Pin Is 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 Mode No sound in REC Mode No sound in REC Mode SYSTEM/KEY Circuit Auto Stop No cassette tape loadingAuto Stop No F.OSD display No Key displayOSD Circuit No OSD display Electrical 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.BOARD Mechanism Part Fixing Type Top View Bottom View Drum Motor Drum Assembly Fig. A-1-1 Fig. A-2-4 Plate Top Fig. A-2-1 Arm 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-2-4 Head F/E Fig. A-3-2 Arm AssemblyCleaner Base Assembly A/C Head Reel 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-4-3 Arm 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 Capstan Just lift the Plate Slider up Gear Sector Fig. A-7-3Lever Tension Fig. A-7-5 Lever Spring Fig. A-7-6 Base 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-8-2 Base Tension Base Loading Base Loading Fig. A-9-1 Arm Assembly Idler Fig. A-9-3Arm Assembly Idler Base Tension Fig. A-9-2 Deck Mechanism Adjustment Fig. C-1 Mechanism Alignment Position Check Torque Gauge 600g.cm ATG Cassette Torque Meter SRK-VHT-303 Checking TorqueTest Equipment/ Fixture Test Conditions Mechanism Condition Guide Roller Height Adjustment Head Base Audio/Control A/C Head AdjustmentAdjustment Procedure/Diagrams Head Assembly 1KHZ 7KHZ Value AdjustmentPrecise Adjustment Azimuth adjustment Adjustment Procedure Adjustment Diagram Check the Tape Travel after Reassembling Deck Assembly Adjustment after Replacing Drum Assembly Video Heads Check before starting repairs Cleaning Required MaintenanceScheduled Maintenance Maintenance Procedure Greasing 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? Nono Front 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 Remarks Capacitor LOCA.NO Description Specification Remark BATTERY,LITHIUMElectrecal section Buzzer LOCA.NO Description Specification Remark NP0 TS Diode Coil Holder DigitronFilter Fuse R121 0RD1800F608 R3G6 0RD1800F608 R553 0RD2200F608 R610 0RD2701F608 RESISTOR,DRAWING LOCA.NO Description SpecificationRemote Controller Receiver Remark Switch Zener Diode TransformerVaristor TAL