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1

F MONO

O

TUNER Audio select signal

2

AN GND

–

Analog Ground

3

APC ERROR

I

APC ERROR Voltage input

4

DMS UP

I

Click Shuttle fowared/reverse signal input (DMS models only)

5

FUNC. KEY2

I

Function Key Analog voltage input

6

TU AFT

I

AFT (Auto fine tuning signal input)

7

FUNC. KEY1

I

Function Key Analog voltage input

8

POWER FAIL

I

Power failure detect signal input

9

DMS DOWN

I

Click Shuttle fowared/reverse signal input (DMS models only)

10

DEST

I

Destination set

11

S SENS

I

Supply end sensor signal input

12

T SENS

I

Take up end sensor signal input

13

VIDEO RF

I

Video RF Envelop input

14

AU RF

I

Hifi Audio Envelop input

15

AN 5V

–

Power supply

16

RESET

I

RESET signal input

17

3.58/4.43

O

NTSC color freq. judge signal

18

PAL

O

“H”: PAL (Video block control signal)

19

SAP BILL OUT

I

MAIN/SAP judge input

20

STEREO OUT

I

STEREO/MONO judge input

21

MAIN/SAP

O

MAIN/SAP select signal

22

VCC

–

Power supply

23

AF SWP

O

AF switching pulse output

24

RF SWP

O

RF switching pulse output

25

CAP VS

O

Capstan error signal output

26

DRUM VS

O

Drum motor error signal output

27

QVD

O

Quasi VD pulse output

28

N.C.

–

Not used

29

H. AMPSW

O

“H”: A-DUB mode (CTL Amp. Gain. Coutrol)

30

N.C.

–

Not used

31

CTL (+)

I/O

CTL head signal Input/Output (rec mode)

32

CTL (–)

I/O

CTL head signal Input/Output (rec mode)

33

VSS (SERVO)

–

Ground

34

CTL-AMP1

I

CTL Amp. Coutrol (Gain set)

35

CTL-AMP2

I

CTL Amp. Coutrol (Gain set)

36

CTL-AMP3

I

CTL Amp. Coutrol (Gain set)

37

CTL-AMP OUT

O

CTL Amp. Output (For Check)

38

DRUM FG

I

Drum FG Schmitt amp. input

39

DRUM PG

I

Drum PG Schmitt amp. input

40

CAP FG

I

Capstan FG Schmitt input

41

VCC (SERVO)

–

Power supply

42

VCC(OSD)

–

Power supply

43

CV IN

I

Composite Video signal input

44

VREF

I

Reference bias and clamp bias power pin

45

CV OUT

O

Composite Video signal output

46

N.C.

–

Not used

47

AFC LPF

I

AFC LPF pin

48

AFC OSC

I

AFC oscillator pin

49

VSS (OSD)

–

Ground

50

DOSC-IN

I

OSD dot clock oscillator (input)

51

DOSC-OUT

O

OSD dot clock oscillator (output)

52

4FSC-OUT

O

OSD 4fsc oscillator terminal (output)

53

4FSC-IN

I

OSD 4fsc oscillator terminal (input)

54

CSYNC

I

Composite Sync signal input

55

REC PRF

I

Erasing protection tab. Cassette in detection

56

IIC DATA

O

EEP ROM, Hifi IC, Tuner/Serial communication signal (IIC DATA)

57

IIC CLOCK

O

EEP ROM, Hifi IC, Tuner/Serial communication signal (IIC CLOCK)

58

DRUM QR

O

Drum motor step driving

59

AF REC

O

“H” output when Hifi audio REC

60

AF REC P

O

“L” output when Hifi audio REC pause

61

TV/VTR

O

RF output control

62

SSB CLOCK (VIDEO)

O

Video, Video Amp. Serial communication signal (CLOCK)

63

SSB DATA (VIDEO)

O

Video, Video Amp. Serial communication signal (DATA)

64

BLUE BACK

O

OSD block control signal output

65

APC PWM

O

APC PWN signal

66

CAP TRQ PWM

O

Capstan TRQ PWN output

67

TA MUTE

O

“H” output when Tuner mute

68

TEST

I

Fixed to Ground

69

32kHz (IN)

I

Timer Clock terminal (32kHz)

70

32kHz (OUT)

O

Timer Clock terminal (32kHz)

71

VSS

–

Ground

72

10MHz (IN)

I

System clock terminal (10MHz)

73

10MHz (OUT)

O

System clock terminal (10MHz)

74

END LED

O

Top/End LED ON/OFF control

75

REC P

O

“L” output when  REC pause mode

76

IN SEL 1

O

LINE-INPUT selection control signal-1

77

IN SEL 2

O

LINE-INPUT selection control signal-2

78

OSD SEL

–

Not used

79

A MUTE

O

“H” Audio mute signal outout

80

WRITE CONT

O

EEPROM write timing control

81

EP. LP

O

“H” : “LP/EP” mode

82

REMOCON

I

Remote control signal (SIRCS) input

83

CAM

O

CAM motor control

84

MODE 1

I

Mechanism section CAM encoder input (data1)

85

MODE 2

I

Mechanism section CAM encoder input (data2)

86

MODE 3

I

Mechanism section CAM encoder input (data3)

87

MODE 4

I

Mechanism section CAM encoder input (data4)

88

T REEL

I

T side reel FG input

89

S REEL

I

S side reel FG input

90

FLD CS

O

FIP driver chip select signal output

91

FUll ERASE

O

Full erase head on/off control signal

92

P CONT

O

Power Supply control signal

93

CAP RVS

O

Capstan reverse control signal H when Reverse

94

CAP QR

O

Capstan step driving

95

S CLOCK 0

O

Serial communication signal (Serial clock)

96

S IN 0

I

Serial communication signal (Data input)

97

S OUT 0

O

Serial communication signal (Data output)

98

PLL CLOCK

O

TUNER PLL clock

99

TU ENABLE

O

TUNER PLL signal chip select

100

PLL DATA

O

TUNER PLL data

1

OUTL

O

Analog output  left

2

OUTR

O

Analog output  right

3

VDDA1

–

Analog power supply; DAC circuitry

4

VSSA1

–

Analog ground; DAC circuitry

5

VSSD1

–

Digital ground; DAC circuitry

6

VDDD1

–

Digital power supply; DAC circuitry

7

VSSD2

–

Digital ground; DSP part

8

VDDD2

–

Digital power supply; DSP part

9

TP2

I

Additional test pin 2; connected to ground for normal operation

10

NICAM

–

Not used

11

TP1

I

Additional test pin 1; connected to ground for normal operation

12

PCLK

–

Not used

13

ADDR1

–

Not used

14

Vtune

O

Tuning voltage output for crystal oscillator

15

XTALI

I

Crystal oscillator input

16

XTALO

O

Crystal oscillator output

17

TEST2

I

Test pin 2; connected to ground for normal operation

18

Iref

I

Resistor for reference current generation; front end circuitry

19

ADDR2

–

Not used

20

VSSA2

–

Analog ground; analog front end circuitry

21

VDDA2

–

Analog power supply; analog front end circuitry

22

TEST1

I

Test pin 1; connected to ground for normal operation

23

SIF2

I

Sound IF input 2

24

Vref1

I

Reference voltage; analog front end circuitry

25

SIF1

I

Sound IF input 1

26

CRST

Capacitor for power-on reset

27

VSSD3

–

Digital supply; front end circuitry

28

VDDD3

–

Digital supply; front end circuitry

29

SCL

I

Serial communication signal (IIC CLOCK)

30

SDA

I

Serial communication signal (IIC DATA)

31

SDO

–

Not used

32

WS

–

Not used

33

SCK

–

Not used

34

SYSCLK

–

Not used

35

VDDD4

–

Digital power supply; demodulator circuitry

36

VSSD4

–

Digital ground; demodulator circuitry

37

P1

–

Not used

38

MONOIN

–

Not used

39

EXTIR

I

External audio input right channel

40

EXTIL

I

External audio input left channel

41

Vref2

I

Analog reference voltage digital-to-analog converter and operational amplifiers

42

P2

–

Not used

43

VDDA3

–

Analog power supply; operational amplifiers

44

VSSA3

–

Analog ground; operational amplifiers

This set displays an error code, and a mode code in case of error
on the display tube, if the operation stopped by error.
The following provides description concerned.

A: Error code ............................................................... Table 6-1
B: Mode code in case of error .................................... Table 6-2

These codes are displayed at lower 5-digit positions of display
tube.
In this case, “ : ” between digits is not displayed.

Display tube (lower 5 digits)

A

B

Code

Description

0

NO ERROR

1

CAM ENCODER ERROR, LOAD DIRECTION

2

CAM ENCODER ERROR, UNLOAD DIRECTION

3

T REEL ERROR

4

S REEL ERROR

5

CAPSTAN ERROR

6

DRUM ERROR

7

INITIALIZE ERROR

8

CASSETTE UNLOADING ERROR

9

RESERVED

Code

Description

0

EJECT (POWER ON)

1

EJECT (POWER OFF)

2

UNLOAD STOP

3

STOP (POWER ON)

4

POWER OFF (CASSETTE IN)

5

F. FWD

6

REW

7

LOW SPEED F. FWD

8

LOW SPEED REW

9

STANDBY

10

REC

11

REC (VISS)

12

REC PAUSE

13

PLAY

14

A. DUB

15

A. DUB PAUSE

16

CUE

17

REV

18

STILL (MECHA FWD)

19

FWD FRAM BY FRAM (FWD SLOW)

20

STILL (MECHA RVS)

21

RVS FRAM BY FRAM (RVS SLOW)

1

2

3

4

Mode

SP

SP

EP

EP

Video signal

Color bar

Monoscope

Color bar

Monoscope

Audio signal

(HiFi/Normal)

400 Hz

Time

Seven minutes

Three minutes

Seven minutes

Three minutes

Refer to the SERVICE  MANUAL of VHS MECHANICAL AD-
JUSTMENT VI.

Necessary items and indications for total adjustment of electric
circuit of this machine will be described in this chapter.

1) Color TV
2) Oscilloscope 1 or 2 phenomena, band more than 30 MHz, de-

lay mode, as provided.

3) NTSC pattern generator
4) Digital voltmeter
5) Audio level meter
6) Audio noise meter
7) Audio generator
8) Attenuator
9) Alignment tape

Part Code:  8-192-605-32 KRV-51N2

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

In this adjustment,  NTSC pattern generator is connected with LINE
input signal terminal. When check to tuner, connected AERIAL
terminal. Check that the amplitudes of video signal SYNC signal,
of picture portions, and of burst signals are flat at approximately
0.3, 0.7 and 0.3 V, respectively, and that the level ratio of the burst
signal and “red” signal are 0.30: 0.66. Fig. 7-2-2. shows video signals
(color bars) used in adjusting the video section.

Video output

(75 

Ω

)

Pattern generator

VCR

VIDEO LINE IN

Monitor TV

VIDEO LINE OUT

Video inputs

LINE IN

: phono jack

1 Vp-p, 75 

Ω

, unbalanced, sync negative

Audio inputs

LINE IN

: phono jacks

47 kW, –7.5 dBs (0 dBs = 0.775 Vrms)
More than 10 kW, –4 dBs

Video outputs

LINE OUT : phono jack
1 Vp-p, 75 

Ω

, unbalanced, sync negative

Audio outputs

LINE OUT : phono jacks
–7.5 dBs at load impedance 47 k

Ω

Output impedance : less than 10 

Ω