Sony LX70S, RMT-V293A MA-405 Tuner Schematic Diagram, See page 4-5 for printed wiring board

Page 42

MA-405 (TUNER) SCHEMATIC DIAGRAM

– Ref. No: MA-405 board; 1000 series –

• See page 4-5 for printed wiring board.

SLV-LX40/LX50/LX60S/LX70S

A

B

1

2

3

4

5

MA-405 BOARD(5/7)

TUNER (TU BLOCK)

XX MARK:NO MOUNT

6

7

8

9

10

11

12

13

14

TU701

AUDIO IN	CH SW	5V	CONT	VIDEO IN	ENABLE	CLOCK	DATA	NC	5V	NC	30V	NC	IF	AUDIO OUT	SIF	AFT	DET OUT
2	3	4	5	6	10	11	12	13	14	15	16	17	18	21	22	23	24

A5

A1

A4

A2

A3

B+

B+

IF

JS753

				B+
C			R704					B+
		R703	560	C701		JL715		JL716
		R703		C701		JL715		JL716
		390		47u
		1/4W		25V	JL717
	RF V OUT	VS15
	8	VT2
	TU VIDEO IN	VT2				C796
	MA-405 (2/7)			LX40/LX50		10∝
	(SEE PAGE 4-9)	HT1		LX40/LX50		16V
	TU AUDIO MONO	HT1				C709	C702	C710
						C709	C702	C710
						100u	0.01u	0.01u
		RFCH			C797	16V	B	B
		RFCH	C705	0.033u
			C705		25V			C712
D		S701	XX		25V
		S701	XX		B
					B			100u
		4CH						16V
		4CH
		3CH	R712
		3CH	0			2.2uH	2.2uH
						2.2uH	2.2uH
						L703	L704
		+30V	B+		+30V
		+30V
								R723
								560
								1/4W
E	16
E	MA-405 (7/7)							C794
	MA-405 (7/7)		B+					C794
	(SEE PAGE 4-19)		B+					0.22u
		SW_5V	AN_GND					B
		SW_5V

	AN_GND

F

D702

RD33ES-T1B3

C706

0.01u

B

C704

50V

4.7u R724

470k

1/10W

JL711

	R701	1k	1/4W	JL701	A1
TV/VTR	TS1			JL701	A1
TV/VTR	TS1
PLL CLOCK	R709	1k		JL702	A2
PLL CLOCK	TS2

					470p
	13				C798
G	13	PLL DATA	R710	1k	JL703	A3
		PLL DATA	TS3
	MA-405 (3/7)				470p
	(SEE PAHE 4-11)			1k	C799
		PLL ENABLE	R711	1k	JL704	A4
		PLL ENABLE	TS4
					470p
					C800
		TU AFT	TS5		JL705	A5
		TU AFT	TS5
H	8		JL713
	MA-405 (2/7)	RF AUDIO OUT	HT3
	MA-405 (2/7)		R702
	(SEE PAHE 4-9)		3300
			3300
			1/10W

I	14		SIF

	MA-405 (4/7)	AN GND	AN_GND
	(SEE PAGE 4-13)

J

4-15

	Note :
	The components identified by
	mark ! or dotted line with mark
C707	! are critical for safety.
2200p	Replace only with part number
B	specified.
	specified.

SIGNAL PATH

VIDEO SIGNAL

AUDIO

SIGNAL

CHROMA

Y

Y/CHROMA

REC

PB

4-16	TUNER
4-16	MA-405(5/7)

Image 42

Contents Specifications RMT-V293A/V294ASafety CHECK-OUT Disassembly Adjustments Table of ContentsService Note Block DiagramsService Note Error Code IndicationSetting up the remote commander HookupsCompleting A/V hookup Hookup 1 VCR setupHookup Antenna hookup HookupHookup 3 VCR setup Hookup 2 VCR setupHookup Connecting a cable box with many scrambled channels Automatic clock settingSetting the clock Using the Auto Clock Set featureSelecting a language Using Manual Clock Set If the clock does not activatePresetting channels Presetting all receivable channels automaticallyPresetting/disabling channels manually Playing a tape If the picture is not clearRecording TV programs To save a recording Recording TV programs using the Dial TimerTo watch another TV program while recording Before you startRecording TV programs using the timer About the Demonstration ModeTo resume normal playback Playing/searching at various speedsLocking the VCR Child Lock To lock the VCRRecording stereo programs Setting the recording duration timeChecking/changing/canceling timer settings Recording bilingual programsSearching using the Time Search function Searching for the beginning of a timer recorded programSearching using the index function How sound is recorded on a video tapeTo cancel skip-search Search forward while Showing the tape contents Fast-forwardPress H Play or x Stop Changing menu options Adjusting the pictureAdjusting the tracking About the Adaptive Picture Control APC functionEditing with another VCR How to connect to record on this VCROperation when recording on this VCR Before you start editingGeneral setup information Index to parts and controlsDisplay window Rear panel11--19E SLV-LX40/LX50/LX60S/LX70S Section Disassembly CASE, Front Panel Block AssemblyRear Panel Mechansim Deck Internal Views Top ViewBottom View Circuit Boards Location Overall Block Diagram Video Block Diagram SERVO/SYSTEM Control Block Diagram Tuner Block Diagram Audio Block Diagram Power Block Diagram TA a Xedit → Edit PB/XREC → PB/RECFrame Schematic Diagram VIDEO, AUDIO, SERVO/SYSTEM CONTROL, TUNER, Power MA-405 REC/PB Head AMP Schematic Diagram REC/PB Head AMPSee page 4-21 for waveforms MA-405 BOARD1/7 MA-405 Y/C, Audio Processor Schematic Diagram Audio ProcessAudio Processor VA Block MA-405 SERVO/SYSTEM Control Schematic Diagram SERVO/SYSTEM Control SS BlockMA-405 Audio Process Schematic Diagram See page 4-5 for printed wiring board MA-405 BOARD4/7Audio Process AU Block Tuner MA-405 Tuner Schematic DiagramSee page 4-5 for printed wiring board MA-405 BOARD5/7MA-405 Display Control Schematic Diagram See page 4-5 for printed wiring board MA-405 BOARD6/7Display Control Front Block See page 4-5 for printed wiring board MA-405 BOARD7/7 Power SupplyMA-405 Power Supply Schematic Diagram Power Supply PS BlockDrum PG REC/PBDrum FG OSD V OUTLine 2 FJ-32 BoardLine 2 Dial Timer Dial TimerDI-80 Board Signal Pin No System Control Mechanism Block Interface MA-405 Board IC160System Control VIDEO/RP Block Interface MA-405 Board IC160 System Control Audio Block Interface MA-405 Board IC160Pin Name Function 55-4E Mechanical Adjustments Electrical AdjustmentsPreparation Before Adjustment Power Supply Check Input/Output Levels and ImpedanceAudio System Adjustment Servo System CheckVTR ACE Head Adjustment SW5V Adjusting Parts Location DiagramVIDEO/AUDIO Line IN/OUT RF/HF SWPExploded Views Front Panel and Upper Case SectionChassis Section 5455Mechanism Deck 707 708 712 706 702 701 709 704 710 705 722 703721 711 720 713 725 724 714 719 715 717 718 Roller ASSY, Guide Spring Power TensionBrake ASSY,MAINT Spring803 802 833 Screw + P2.6 x 6 TYPE2 NON-SLITLX70SCL,CS Connector SwitchSWITCH, Tact ResistorMA-405 Double LayerCeramic MylarFilm HOUSING, Connector 6P LX40/LX50 CONNECTOR, FFC/FPC 5PPIN, Connector 4P CONNECTOR, FFC/FPC 7PShort Jumper Selector FILTER, Line Fluorescent Indicator TubeTUBE, Fluorescent Indicator Short CoilTransistor 2SC1815GR-TPE2 TransistorTransistor PT380F3 Transistor 2SC2712Y-TE85LMetal Oxide SWITCH, Tact Ppause SWITCH, Rotary ModeSWITCH, Tact 0REW SWITCH, Tact ·PLAYRef. No Description Remarks Ref. No Sony Corporation Published by Quality Assurance Dept