Sony RMT-V293A, LX70S, RMT-V294A, LX60S System Control VIDEO/RP Block Interface MA-405 Board IC160

Page 49

5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE (MA-405 BOARD IC160)

Signal

Pin No.

I/O

I/O level

RESET

MA-405 Board

I

Normally “H”, “L” when service interruption detected or restored.

IC160 ef

 

 

 

 

 

 

 

I2C DATA 1

MA-405 Board

I/O

Serial communication data to EEPROM I2C161.

IC160 es

 

 

 

 

 

 

 

I2C CLOCK 1

MA-405 Board

O

Serial communication clock to EEPROM I2C161.

IC160 ea

 

 

 

 

 

 

 

I2C DATA VIDEO

MA-405 Board

I/O

Serial communication data to video and audio microprocessor.

IC160 us

 

 

 

 

 

 

 

I2C CLOCK VIDEO

MA-405 Board

O

Serial communication clock to video and audio microprocessor.

IC160 ua

 

 

 

 

 

 

 

(ARC) S OUT 1

MA-405 Board

I/O

Serial communication data to ARC microprocessor.

IC160 rs

 

 

 

 

 

 

 

(ARC) CLK 1

MA-405 Board

O

Serial communication clock to ARC microprocessor.

IC160 ra

 

 

 

 

 

 

 

5-4. SYSTEM CONTROL AND RF MODULATOR — INPUT SELECTION BLOCK INTERFACE (MA- 405 BOARD IC160)

Signal

Pin No.

ANT SEL

MA-405 Board

IC160 wa

 

 

 

I/O

I/O level

O

“H” when RF modulator through.

 

 

5-5. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-405 BOARD IC160)

Signal

Pin No.

I/O

STOP/FF

TAPE

TAPE

PB

REC

REC/

/REW

LOADING

UNLOADING

PAUSE

 

 

 

 

 

RF SWP

MA-405 Board

O

*1

*1

*1

*1

*1

*1

IC160 qk

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

QVD

MA-405 Board

O

L

L

L

*2

L

L

IC160 qd

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C SYNC

MA-405 Board

I

*3

*3

*3

*3

*3

*3

IC160 tk

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

*1. Synchronized with drum rocation, 30Hz 50% duty pulse.

*2. Normal “L”, “H” when video signal is not rgenerated.

*3. Composite sync signal (positive).

5-6. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-405 BOARD IC160)

Signal

Pin No.

I/O

STOP/FF

TAPE

TAPE

PB

REC

REC/

/REW

LOADING

UNLOADING

PAUSE

 

 

 

 

 

A MUTE

MA-405 Board

O

L

L

L

L

L

L

IC160 yd

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AF REC P

MA-405 Board

O

L

L

L

L

H

L

IC160 ws

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5-2

Image 49
Contents RMT-V293A/V294A SpecificationsSafety CHECK-OUT Service Note Table of ContentsDisassembly Adjustments Block DiagramsError Code Indication Service NoteHookups Setting up the remote commanderHookup Antenna hookup Hookup 1 VCR setupCompleting A/V hookup HookupHookup Connecting a cable box with many scrambled channels Hookup 2 VCR setupHookup 3 VCR setup Automatic clock settingUsing the Auto Clock Set feature Setting the clockSelecting a language If the clock does not activate Using Manual Clock SetPresetting all receivable channels automatically Presetting channelsPresetting/disabling channels manually If the picture is not clear Playing a tapeRecording TV programs To watch another TV program while recording Recording TV programs using the Dial TimerTo save a recording Before you startAbout the Demonstration Mode Recording TV programs using the timerLocking the VCR Child Lock Playing/searching at various speedsTo resume normal playback To lock the VCRChecking/changing/canceling timer settings Setting the recording duration timeRecording stereo programs Recording bilingual programsSearching using the index function Searching for the beginning of a timer recorded programSearching using the Time Search function How sound is recorded on a video tapeSearch forward while Showing the tape contents Fast-forward To cancel skip-searchPress H Play or x Stop Adjusting the tracking Adjusting the pictureChanging menu options About the Adaptive Picture Control APC functionOperation when recording on this VCR How to connect to record on this VCREditing with another VCR Before you start editingIndex to parts and controls General setup informationRear panel Display window11--19E CASE, Front Panel Block Assembly SLV-LX40/LX50/LX60S/LX70S Section DisassemblyRear Panel Mechansim Deck Top View Internal ViewsBottom View Circuit Boards Location Overall Block Diagram Video Block Diagram SERVO/SYSTEM Control Block Diagram Tuner Block Diagram Audio Block Diagram Power Block Diagram Xedit → Edit PB/XREC → PB/REC TA aFrame Schematic Diagram VIDEO, AUDIO, SERVO/SYSTEM CONTROL, TUNER, Power REC/PB Head AMP MA-405 REC/PB Head AMP Schematic DiagramSee page 4-21 for waveforms MA-405 BOARD1/7 Audio Process MA-405 Y/C, Audio Processor Schematic DiagramAudio Processor VA Block SERVO/SYSTEM Control SS Block MA-405 SERVO/SYSTEM Control Schematic DiagramSee page 4-5 for printed wiring board MA-405 BOARD4/7 MA-405 Audio Process Schematic DiagramAudio Process AU Block See page 4-5 for printed wiring board MA-405 Tuner Schematic DiagramTuner MA-405 BOARD5/7See page 4-5 for printed wiring board MA-405 BOARD6/7 MA-405 Display Control Schematic DiagramDisplay Control Front Block MA-405 Power Supply Schematic Diagram Power SupplySee page 4-5 for printed wiring board MA-405 BOARD7/7 Power Supply PS BlockDrum FG REC/PBDrum PG OSD V OUTFJ-32 Board Line 2Line 2 Dial Timer Dial TimerDI-80 Board System Control Mechanism Block Interface MA-405 Board IC160 Signal Pin NoSystem Control Audio Block Interface MA-405 Board IC160 System Control VIDEO/RP Block Interface MA-405 Board IC160Pin Name Function 55-4E Electrical Adjustments Mechanical AdjustmentsPreparation Before Adjustment Input/Output Levels and Impedance Power Supply CheckServo System Check Audio System AdjustmentVTR ACE Head Adjustment VIDEO/AUDIO Line IN/OUT Adjusting Parts Location DiagramSW5V RF/HF SWPFront Panel and Upper Case Section Exploded Views5455 Chassis Section707 708 712 706 702 701 709 704 710 705 722 703 Mechanism Deck721 711 720 713 725 724 714 719 715 717 718 Brake ASSY,MAINT Spring Power TensionRoller ASSY, Guide SpringScrew + P2.6 x 6 TYPE2 NON-SLIT 803 802 833SWITCH, Tact SwitchLX70SCL,CS Connector ResistorDouble Layer MA-405Mylar CeramicFilm PIN, Connector 4P CONNECTOR, FFC/FPC 5PHOUSING, Connector 6P LX40/LX50 CONNECTOR, FFC/FPC 7PTUBE, Fluorescent Indicator FILTER, Line Fluorescent Indicator TubeShort Jumper Selector Short CoilTransistor PT380F3 TransistorTransistor 2SC1815GR-TPE2 Transistor 2SC2712Y-TE85LMetal Oxide SWITCH, Tact 0REW SWITCH, Rotary ModeSWITCH, Tact Ppause SWITCH, Tact ·PLAYRef. No Description Remarks Ref. No Published by Quality Assurance Dept Sony Corporation