DOWNLOAD Sony SLV-L49 / SLV-L52 / SLV-L59 / SLV-L69HF / SLV-L72HF / SLV-L79HF / SLV-L89HF / SLV-X55 / SLV-X66HF Service Manual ↓ Size: 17.03 MB | Pages: 70 in PDF or view online for FREE

5-3

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

DEST

FULL ERS

TU AFT

FUNC KEY2

FUNC KEY1

S SENS

T SENS

V RF ENV

AF ANV

CBC ON

KKP+

KKP–

QVD

REMOCON

C ROT

HA SWP

ENV SW

RF SWP

AF SWP

END LED

ANT SEL

AF REC P

FE ON

CAP RVS

SUR ON

MODE4

MODE3

MODE2

MODE1

REC PRF

I2C CLK EEP

I2C DATA EEP

CAM

RESET

32kHz (in)

32kHz (out)

Vcc

4fsc (in)

4fsc (out)

Vss

ARC CLK

ARC DATA

CLK SEL

OSC IN

OSC OUT

NUB

LPF

SP

OSD GND

OSD V IN

I

I

I

I

I

I

I

I

O

I

I

O

I

O

O

I

O

O

O

O

O

O

I

I

I

I

I

I/O

I/O

O

I

I

O

I

I

O

O

O

I

I

O

I/O

O

I

Destination control input

NC

Tuner analog AFT input

Key input

Key input

Tape end sensor input

Tape top sensor input

Video playback signal envelope input

Hi-Fi audio playback signal envelope input

Cable box control signal output

ETR pulese signal input

ETR pulese signal input

Quasi VD pulese output

Remote sires signal input

Head AZ signal output

SP/EP changed head signal

SP/EP head output lebel ditaction signal

VIDEO RF switching pulse output.

AF switching pulse output.

END sensor LED output

TV/VTR RF modulator control output

Hi-Fi record control pulse output.

NC

Capstan reverse control

NC

Mechanism section CAM encoder input (data4)

Mechanism section CAM encoder input (data3)

Mechanism section CAM encoder input (data2)

Mechanism section CAM encoder input (data1)

Erasing protection tab, cassette IN detection input

HC CLOCK line (EEPROM)

HC DATA line (EEPROM)

Cam motor control signal output

System reset input

Sub clock 32MHz

Sub clock 32MHz

5V

Main clock input

Main clock output

Ground

Rearityregenarator (ARC) control clock signal

Rearityregenarator (ARC) control data signal

CLOCK seleal “L” Sub clock, “H” main and sub clock.

OSD clock input

OSD clock output

Ground

fsc filter

“L” output when SP mode.

Ground

OSD Video signal input.

5-4E

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

WHITE LEVEL

OSD V OUT

OSD Vcc

HLF

V HOLD

C VIDEO IN

NUA

C SYNC

PLL CLK

PLL DATA

PLL ENABLE

TA MUTE

A MUTE

P CONT M12

P CONT SW12

FLD CS

V-SET CS

S OUT0

S IN 0

S CLK 0

I2C CLK

I2C DATA

CBC SIRCS OUT

BUZZER

NICOLE

CAP ERR

DRUM ERR

P FAIL

S REEL

T REEL

DMS+

DMS–

MAIN/SAP

F MONO

STEREO

SAP

CAP FG

AMP Vss

DRUM FG

DRUM PG

AMP Vref OUT

AMP Vref IN

RC CHECK

CTL–IN

CTL+IN

AMP C

CTL AMP OUT

AMP Vcc

A Vcc

V-SET RESET

I

O

I/O

I/O

I

I

O

O

O

O

O

O

O

O

O

O

I

O

I/O

I/O

O

O

O

O

I

I

I

I

I

O

O

I

I

I

I

I

O

I

I

I/O

I/O

O

O

White level signal input

OSD Video signal output

SW 5V (OSD block)

External low-pass filter for slicer/AFC is connected to this terminal

External capacitor for slicer is connected to this terminal

Control video signal input (osd, tuner, sorvo)

D Ground

Composite sync input

Tuner PLL clock output

Tuner PLL data output

Tuner enable output

Tuner audio mute output

AUDIO mute output

Motor 12V control output

SW 12V control output

FLD drive chip select signal output

V-set micon chip select signal output

Serial communication signal (FLD, V-SET)

Serial communication signal (FLD, V-SET)

Serial communication signal (FLD, V-SET)

IIC clock signal (VIDEO, HiFi)

IIC data signal (VIDEO, HiFi)

Cable mouse sircs signal output

NC

Timing signal output

Capstan error D/A output

Drum error D/A output

Power fail detection input

Supply reel sensor input

Take up reel sensor input

DMS control input

DMS control input

Tuner MAIN/SAP select signal

Tuner audio normal select

Tuner Stereo ditection “L” when Stereo mode.

Tuner SAP ditection “L” when SAP mode.

Capstan FG signal input

Ground

Drum FG input.

Drum PG input.

Analog AMP reference Vcc output

Analog AMP reference Vcc input

Check input

Control signal IN/OUT

Control signal IN/OUT

Control signal AC conect

Control signal AMP output

D-5V

D-5V

NC

6-1

For the mechanical adjustments, please refer to the
“VHS MECHANICAL ADJUSTMENT MANUAL
(S MECHANISM)” (9-921-647-11).

See the adjusting part location diagram from on page 6-6
for the adjustment.

The measuring instruments used for this alignment include:
1)

Monitor TV

2)

Oscilloscope, dual-trace, bandwidth of 30 MHz or more, with
delay mode (A probe 10:1 should be used unless otherwise
specified.)

3)

Frequency counter

4)

NTSC Pattern generator

5)

Remote commander

6)

Digital voltmeter

7)

Audio generator

8)

Audio level meter

9)

Audio attenuator

10) Alignment tapes

KRV-51N2 (NTSC) Part No. : 8-192-605-32

Unless otherwise specified, connect and adjust the measuring
instruments as shown in the following diagram.

Fig. 6-2-1

In this adjustment, NTSC pattern generator is connected with LINE
input terminal.  When check to tuner, connected AERIAL terminal.
Check that the synchronizing signal of the Y signal has an amplitude
of approximately 0.7 V and that the burst signal has an amplitude of
approximately 0.3 V and its waveform is flat. And check that the
level ratio of burst signal to “red” signal is 0.30 : 0.66. The video
signal (color bar) used for electrical aligning this unit is shown in
Fig. 6-2-2.

Fig. 6-2-2 Color Bar Signals of Pattern Generator

• Contents of KRV-51N2

VIDEO LINE IN

VIDEO LINE OUT

Video output

(75

Ω

)

Pattern generator

VCR

Monitor TV

1

2

3

4

Mode

SP

LP

Period

7 minutes

3 minutes

7 minutes

3 minutes

Video signal

Color bar

Monoscope

Color bar

Monoscope

Audio signal

Hi-Fi

400Hz

(L/R)

Normal

400Hz

White (100%)

About 0.7 V

About 
0.3 V

Horizontal sync signal

Red

Burst signal
(It must be flat.)

About 
0.3 V

6-2

Video input: LINE IN

Input signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative

Video output: LINE OUT

Output signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative

Audio input: LINE IN

Input level: –7.5 dBs
(0 dBs= 0.775 Vrms)
Input impedance: more than 47 kilohms

Audio output:LINE OUT

Standard level: –7.5 dBs at load impedance 47
kilohms
Output impedance: less than 10 kilohms

The adjustments should be performed in the following sequence.

Mode

STANDBY

+30 V Check

Measurement point

C627 

‘

Specified value

31.0 – 39.0 V

–11 V Check

Measurement point

C642 

’

Specified value

–12.5 – – 9.5 V

+6 V Check

Measurement point

Corrector of Q607

Specified value

5.56 – 6.25 V

Mode

E-E

Measuring Instrument

Digital voltmeter

+12 V Check

Measurement point

IC601 pin 2

Specified value

11.7 –12.3 V

+5 V Check

Measurement point

Emitter of Q603

Specified value

4.8 –5.4 V

MTR12 V Check

Measurement point

Correcter of Q605

Specified value

12.5 –14.5 V

[Check Method]
1)

Each of these supply voltages must meet its specified value.

Power Supply Check

Servo/Video System Adjustments

Audio System Adjustments