LG Electronics TL-AT130M service manual Terminal Signal Levels, IN/OUT Description

Page 6

SECTION1 SUMMARY

LOCATION OF CUSTOMER CONTROLS

TERMINAL SIGNAL LEVELS

TERMINAL

SIGNAL LEVEL

IN/OUT

DESCRIPTION

VIH : 4

~ 5V

The input signal that makes

1. ALARM IN

VIL

: 0 ~ 0.6V

INPUT

‘Alarm Record’ work

T

: above 250 msec

VIH : 4

~ 5V

Outputs whether ‘Alarm

2. ALARM OUT

VIL

: 0 ~ 0.6V

OUTPUT

Recording’ is working

T : ALARM REC STATE

3.ALARM RESET

VIH : 4

~ 5V

The terminal that stops ‘Alarm

VIL

: 0 ~ 0.6V

INPUT

T

: above 250 msec

Record’ in Auto mode

VIH : 4 ~ 5V

The input terminal to make

5. SERIES IN

VIL

: 0 ~ 0.6V

INPUT

T

: above 250 msec

‘Series Record’ work

6. SERIES OUT

VIH : 4 ~ 5V

Output signal appears when the

VIL

: 0 ~ 0.6V

OUTPUT

tape reaches to end or deck is

T

: above 250 msec

error in recording.

7. WARNING OUT

VIH : 4 ~ 5V

Outputs whether VCR deck is

VIL

: 0 ~ 0.6V

OUTPUT

error.

T : until any-key is pressed

VIH : 4 ~ 5V, VIL : 0 ~ 0.6V

The signal is output which is used by

8. TRIGGER OUT

8 msec : NTSC

OUTPUT

switching several cameras in

10 msec : PAL

general space with using camera

multi-plexer.

VIH : 4 ~ 5V

As the terminal that outputs that tape

10. LOW TAPE OUT

VIL

: 0 ~ 0.6V

OUTPUT

remains less than 5 minutes in

recording, it isn’t output in ‘1-shot

T : below 5 min, end of tape

Record’.

VIH : 4 ~ 5V

The terminal that makes ‘1-short

11. 1-SHOT REC IN

VIL

: 0 ~ 0.6V

INPUT

T

: above 250 msec

Record’ work in Auto mode

4, 9, 12. GND

-

0V

COMMON

1-4

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Contents KEY Table of Contents Summary Front RearIndicator Panel VCR Function IndicationTerminal Signal Levels IN/OUT DescriptionSummary Critical Parts Replacing Time Table Cabinet & Main Frame Exploded Views Cabinet & Main Frame Section Parts list Cabinet and Main Frame SectionPacking Accessory Section Parts list Packing & Accessory SectionPG Adjustment Connection chart of PG adjustmentPower CircuitSMPS No 5.3 a No 24No 5.2 a to AVCP, Bias When the drum moter stop Video is unstable in PB modePB mode Servo CircuitWhen the capstan motor stops Capstan motor stopsNo Video in EE Mode No Video in EE ModeC Circuit Clean the Drum Check the System Circuit IC501 Pin Pin 16, 40, 55, 58, 87?Is the EE signal normal? Is 5V applied to the IC301 Pin 16, 40, 55, 58, 87?No sound in PB Mode No sound in EE Mode No sound in PB ModeNo sound in EE Mode Audio CircuitNo sound in REC Mode No sound in REC ModeSYSTEM/KEY Circuit Auto Stop No cassette tape loadingAuto Stop No OSD display No Key displayOSD Circuit No F.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 KEY 1 P.C.BOARD KEY 2 P.C.BOARD Jack P.C.BOARDMechanism Top View Bottom View Part Fixing TypeDrum Assembly Fig. A-1-1 Drum MotorPlate Top Fig. A-2-1 Fig. A-2-4Bracket Assembly L/D Motor Fig. A-2-4 Gear Assembly Rack F/L Fig. A-2-5Holder Assembly CST Fig.A-2-2 Arm Assembly F/L Fig. A-2-6Base Assembly A/C Head Arm AssemblyCleaner Head F/E Fig. A-3-2Arm Assembly Tension Fig. A-4-3 Brake Assembly T Fig. A-4-1Brake Assembly RS Fig. A-4-2 Reel S / Reel T Fig. A-4-4Arm 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 Brake Assembly Capstan Lever F/R Fig. A-6-3Lever Spring Fig. A-7-6 Gear Sector Fig. A-7-3Lever Tension Fig. A-7-5 Just lift the Plate Slider upGear Assembly P2 Fig. A-8-1/ Gear Assembly P3 Fig. A-8-2 Base Assembly P2 Fig. A-8-3/ Base Assembly P3 Fig. A-8-4Base Tension Fig. A-9-2 Base Loading Fig. A-9-1 Arm Assembly Idler Fig. A-9-3Arm Assembly Idler Base Tension Base LoadingDeck Mechanism Adjustment Mechanism Alignment Position Check Fig. C-1Mechanism Condition Checking TorqueTest Equipment/ Fixture Test Conditions Torque Gauge 600g.cm ATG Cassette Torque Meter SRK-VHT-303Guide Roller Height Adjustment Head Assembly Audio/Control A/C Head AdjustmentAdjustment Procedure/Diagrams Head BaseAdjustment Procedure Adjustment Diagram Value AdjustmentPrecise Adjustment Azimuth adjustment 1KHZ 7KHZAdjustment after Replacing Drum Assembly Video Heads Check the Tape Travel after Reassembling Deck AssemblyCheck before starting repairs Maintenance Procedure Required MaintenanceScheduled Maintenance CleaningGreasing 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 Nono Is the Belt ok?Front Loading Mechanism Cassette does not load Exploded Views Moving Mechanism A11 NSP Not Service Part RUN DateParts Section LOCA.NO Description Specification Remarks Description SpecificationAssembly Section Remarks ScrewBuzzer LOCA.NO Description Specification Remark BATTERY,LITHIUMElectrecal section CapacitorLOCA.NO Description Specification Remark NP0 TS Coil DiodeFuse DigitronFilter HolderR121 0RD1800F608 R3G6 0RD1800F608 R553 0RD2200F608 R610 0RD2701F608 Switch LOCA.NO Description SpecificationRemote Controller Receiver Remark RESISTOR,DRAWINGTAL TransformerVaristor Zener Diode