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7-7

Mode

E-E

Signal

No signal

Measurement

Q301E or CN301 pin6

point

Measuring

Oscilloscope

instrument

Specified

A=400 ± 120 mVp-p

value

[Check Method]
1)

Check that the record Y level A satisfies the specified value.

Mode

E-E

Signal

Color bar

Measurement

Q314E

point

Measuring

Oscilloscope

instrument

A=140 ± 20 mVp-p (PAL SP)

Specified

A=160 ± 20 mVp-p (PAL LP)

value

A=160 ± 20 mVp-p (NTSC SP)

A=200 ± 20 mVp-p (NTSC LP)

[Adjusting Method]
1)

Check that the record chroma level A satisfies the specified
value.

Mode

Playback

Signal

Alignment tape : Color bar portion

Measurement

LINE-1 OUT VIDEO terminal

point

(terminated at 75

Ω

)

Measuring

Oscilloscope

instrument

Specified

A=1.0 ± 0.18 Vp-p

value

[Check Method]
1)

Check that the playback level satisfies the specified value.

[Adjustment Object]
Adjust to set the character position on the screen.

Mode

E-E

Signal

Color bar

Measurement

IC401 pin@§

point

Measuring

Oscilloscope (DC mode)

instrument

Adjustment

CT401

element

Specified

A=2.80 ± 0.05 Vdc

value

A

A

H

White (100%)

A

H

H

A

VDD=5.1Vdc

GND=0V

7-8

[Adjustment Object]
To adjust the link of the Ach and Bch of the tape playback outputs.
If this specification is not satisfied, the noise will increase and
cracking sounds will be produced.

Mode

Playback

Signal

Alignment tape

Measurement

CH1 : AF SWP (ADJ LAND)(RP-233 board)

point

CH2 : CN502 pin3(RP SWP)(RP-233 board)

Measuring

Oscilloscope

instrument

Adjustment

RV201

element

Specified

No dropouts in the RF signal

value

[Adjusting Method]
1)

Set  TRACKING  switch (Remote commander) to MANUAL.
(“Auto tracking” display will disappear on the display window
indicator.)

2)

Press the tracking buttons  $  and  4  and adjust the tracking
position to the center.

3)

Use RV201 to adjust so that the portion A is minimized.

• For the adjustment of the audio system, perform in the SP mode

if there is no special notes. Use the alignment tape.

• Adjust both LCH and RCH.
[Connecting Instruments]

Perform the adjustment setting the switches and controls on the
following positions if there is no special indications.
•

INPUT SELECT (VHS)    switch .......................................... 1

•

AUDIO MONITOR    switch * ...................................... Stereo

* : Remote commander

The RF SWP adjustment should be completed before
performing this adjustment.

Audio 
Oscillator

Attenuator

LINE-1 OUT
AUDIO

LINE-1 IN
AUDIO

600

Ω

47k

Ω

Audio Level Meter
or Distortion Meter

Normal tracking

TV screen

Moves to the right when the 

4

 button in pressed 

and to the left when the 

$

 button is pressed.

RF signel dropout (Should be minimized)

A

A

OK

CH1
AF SWP

CH2
CN502 pin 

3

(RF SWP)

NG

7-9

[Adjustment Object]
To attain Hi-Fi audio compatibility.
If this apecification is not satisfied, the sound will be distorted.

Mode

Recording

Signal

No-signal

Measuring

Frequency counter

instrument

Measurement

CN501 pin1 or AF SWP (RP-233 board)

point

1.3 MHz adjustment

Adjustment

RV521 (Lch)

element

Specified

1300

 

+ 1

 

kHz

Auto tracking ON

value

         

– 0

(Remote commander)

1.4 MHz adjustment

Adjustment

RV522 (Lch)

element

Specified

1400 ± 1kHz

value

1.7 MHz adjustment

Adjustment

RV531 (Rch)

element

Specified

1700 

+ 1

 

kHz

Auto tracking OFF

value

         

– 0

(Remote commander)

1.8 MHz adjustment

Adjustment

RV532 (Rch)

element

Specified

1800 ± 1kHz

value

Connect the frequency counter through the buffer amplifier
(oscilloscope, etc) with high input resistance (1M

Ω

 or more)

and low capacity (10pF or less).

[Adjusting Method]
1)

Connect pin2 of CN891 to the ground.

2)

Set  TRACKING  button on the remote commander to AUTO.

3)

Adjust RV521 so as to obtain 1300 

  

    kHz.

4)

Adjust RV522 so as to obtain 1400 ± 1 kHz.

5)

Set  TRACKING  button on the remote commander to
MANUAL.

6)

Adjust RV531 so as to obtain 1700      kHz.

7)

Adjust RV532 so as to obtain 1800 ± 1 kHz.

Mode

Recording

Signal

400 Hz, –7.5 dBs : CN801 pin68

Measurement

CN501 pin1 or AF SWP (RP-233 board)

point

Measuring

Modulation Analyzer

instrument

Specified

50 ± 50kHz

value

[Check Method]
1)

Connect pin2 of CN891 to the ground.

2)

Set  TRACKING  button on the remote commander to AUTO.

3)

Verify that the output signal satisfies the specification.

4)

Set TRACKING button on the remote commander to
MANUAL.

5)

Verify that the output signal satisfies the specification.

[Adjustment Object]
To separate the carrier accurately and ensure that the filter for cutting
the video signal functions normally.
If this specification is not satisfied, the sound will be distored.

Mode

Playback

Signal

1,608MHz, 200mVp-p : CN501 pin3

Measurement

CN501 pin1

point

Measuring

Oscilloscope

instrument

Adjustment

RV541

element

Specified

Adjust the A and B amplitudes to the same level.

value

(A–B=±2mVp-p)

[Adjusting Method]
1)

Connect pin2 of CN891 to the ground.

2)

Set  TRACKING  button on the remote commander to AUTO.
(Lch signal output)

3)

Assume the output value at this time as A.

4)

Set TRACKING button on the remote commander to
MANUAL. (Rch signal output)

5)

Assume the output value at this time as B. Adjust RV541 so
that A is equal to B.

+ 1
– 0

+ 1
– 0

7-10

Mode

E-E

Signal

400Hz, – 7.5dBs : LINE-1 IN AUDIO terminal

Measurement

LINE-1 OUT AUDIO terminal

point

Measuring

Audio level meter

instrument

Specified

– 7.5 ± 2dBs

value

[Check Method]
1)

Input signal of 400Hz and –7.5 dBs to the L and R channel of
the audio input at the same time.

2)

Check that the audio output level is –7.5 ± 2dBs.

Mode

Self-record playback

Signal

400Hz, –7.5dBs : LINE-1 IN AUDIO

terminals, left and right

Measurement

LINE-1 OUT  AUDIO terminal

point

Measuring

Audio level meter and Distortion meter

instrument

Specified

Playback Level : –7.5 ± 3dBs

value

Distortion : 4.0% or less

[Check Method]
1)

Record signal.

2)

Playback the recorded portion.

3)

Check that the output level is –7.5 ± 3dBs.

4)

Check that the distortion factor is 4.0% or less on the left and
right side.

Mode

Self-record playback

Signal

No signal (Insert a shorting plug into the

LINE-1 OUT AUDIO jacks, left and right.)

Measurement

LINE-1 OUT  AUDIO terminal

point

Measuring

Audio level meter

instrument

Specified

–46dBs or less

value

[Check Method]
1)

Record.

2)

Playback recorded portion.

3)

Check that noise level is –46dBs or less on the left and right
side.

r

•

Adjust in the SP mode if there is no special indications.

•

Perform the adjustment setting the switch on the following
positions.

•

INPUT SELECT (VHS)    switch .......................................... 1

•

AUDIO MONITOR    switch * ........................... NORMAL*

1

*1 : No indicates on the display window indicator and monitor TV.

[Adjustment Sequence]
1)

ACE head adjustment .... Refer to the VHS mechanical part
adjustment manual 

2)

Recording bias check

3)

E-E output level check

4)

Overall output level and distortion factor check.

5)

Overall noise level check.

Refer to the "VHS Mechanical adjustment manual  "
(9-973-623-11).

Mode

Self-record playback

Signal

400Hz, – 27.5dBs      LINE-1 IN AUDIO

7kHz, – 27.5dBs        terminal (L or R)

Measurement

LINE-1 OUT AUDIO terminal

point

Measuring

Audio level meter

instrument

Specified

0 ± 3dBs

value

[Adjusting Method]
1)

Supply a signal of 400Hz, –27.5dBs to Audio Line Input.

2)

Connect the audio level meter to the Audio Line Output.

3)

Adjust the attenuator so that the audio level meter will indicate
–27.5dBs.

4)

Make recording in the SP mode.

5)

Set an audio line input signal to 7kHz and make recording.

6)

Playback a recorded portion, and measure output levels at
400Hz and 7kHz.

7)

Confirm that the 7kHz playback output levels within a range
of the 400Hz playback output level 0±3dB.