LG Electronics TL-AT130M service manual Summary Critical Parts Replacing Time Table

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SECTION1 SUMMARY

CRITICAL PARTS REPLACING TIME TABLE

No.

DESCRIPTION

1500

3000

5000

6000

7500

9000

10000

12000

Test freatures

Specification

1

DRUM ASSY

 

 

 

 

 

 

 

 

 

RF out level

-4dB and below

 

 

 

 

 

 

 

 

 

 

 

 

 

2

ARM ASSY CLEANER

 

 

 

 

 

 

 

 

Wear status

Whether extraneous

 

 

 

 

 

 

 

 

matters come out

 

 

 

 

 

 

 

 

 

 

 

 

3

MOTOR CAPSTAN (D-35)

 

 

 

 

 

 

 

 

W/F(WTD)

0.4% and below

 

 

 

 

 

 

 

 

 

 

 

 

 

4

BELT CAPSTAN

 

 

 

 

 

 

 

 

Belt tension

Variation amount :

 

 

 

 

 

 

 

 

within 40%

 

 

 

 

 

 

 

 

 

 

 

 

5

BASE ASSY A/C

 

 

 

 

 

 

 

 

Audio and CTL out

-6dB and below

 

 

 

 

 

 

 

 

level

6

HEAD F/E

 

 

 

 

 

 

 

 

 

The rate of erasing

45dB min

 

 

 

 

 

 

 

 

 

(1KHz)

7

ARM ASSY IDLER

 

 

 

 

 

 

 

 

The capacity of ldler

4~12 g

 

 

 

 

 

 

 

 

for moving

8

HOLDER ASSY PINCH

 

 

 

 

 

 

 

 

Surrace solidity of

60~90

 

 

 

 

 

 

 

 

Roller

9

BAND ASSY TENSION

 

 

 

 

 

 

 

 

Back Torque

40~70 g

 

 

 

 

 

 

 

 

 

 

 

 

 

10

HOUSING ASSY

 

 

 

 

 

 

 

 

CST loading status

there shouldn’t be any space

 

 

 

 

 

 

 

 

betwween CST and compartment

 

 

 

 

 

 

 

 

 

 

 

 

 

11

CAPSTAN SOFT BRAKE

 

 

 

 

 

 

 

 

Felt wear

whether there is

 

 

 

 

 

 

 

 

touch noise

12

CLUTCHAY

 

 

 

 

 

 

 

 

 

Torque(Play, Rev)

40~140gcm, 100~210gcm

 

 

 

 

 

 

 

 

 

 

 

 

 

Reference :

 

 

 

 

 

 

 

 

 

 

 

Changing

Cleaning

Checking

 

Notes :

•Check the running path adjustment when you change the itens 1, 3, 5, 6 and 10.

•Check the back tension when you change Band Assy Tension.

CRITICAL PARTS DESCRIPTION

 

1.

Drum Ass’y

Consists of video head, rotary trans and motor. records video and audio information on

 

 

 

 

the tape, and play the tape back.(Audio information is recorded only on the Hi-Fi models)

 

 

 

 

 

 

 

2.

Arm Ass’y Cleaner

Cleans video head and rotation head automatically.

 

 

 

 

 

 

 

4.

Motor Capstan

Moves the tape with regular speed.

 

 

 

 

 

 

 

5.

Belt Capstan

Transfers rotative energy of capstan motor to the driving system.

 

 

 

 

 

 

 

6.

Brake Ass’y Capstan

Brakes rotative energy of capstan motor.

 

 

 

 

 

 

 

7.

Base Ass’y A/C

Consists of three head.

 

 

 

 

Audio erase head in the left upper erases audio signal in dubbing.

 

 

 

 

Audio head in the right upper records and playes the audio signal.

 

 

 

 

CTL head in the right lower records and detects CTL pulse to control tape speed.

 

 

 

 

 

 

 

8.

Head F/E

Is abbreviation of Full Erased Head.

 

 

 

 

erases the signal recorded on a tape clearly and absorb vibration of tape.

 

 

 

 

 

 

 

12.

Arm Ass’y Idler

Is located between T/UP reel and supply reel.

 

 

 

 

Transfers ratative energy of capstan motor to T/UP reel or supply reel.

 

 

 

 

 

 

 

13.

Holder Ass’y Pinch

Sticks a video tape to capstan motor and has the tape played without being

 

 

 

 

slipped from capstan motor axle.

 

 

 

 

 

 

 

14.

Band Ass’y Tension

Has supply reel loosened properly with giving it some tensile force.

 

 

 

 

 

 

 

15.

Arm Ass’y

Makes the cassette tape inserted be loaded and ejected precisly and safely.

 

 

 

 

 

 

 

16.

Clutch Ass’y

Plays the tape with trasfering rotative energy of capstan motor to idler reel.

 

 

 

 

 

 

 

 

 

 

 

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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 ModeNo cassette tape loading SYSTEM/KEY Circuit Auto StopAuto 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-4-3Opener Lid Fig. A-5-2 Arm Assembly Pinch Fig. A-5-3Lever 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 ProcedureChassis Bottom Chassis Top GreasingGear Sector Gear Cam Base Loading Gear Drive Gear AY, P2 & P3 Lever, F/R, Base, TensionBase, 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 RUN Date NSP Not Service PartParts 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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