VC-M303 (serv.man10). Electrical Adjustments - Sharp VCR Service Manual (repair manual). Page 3

Measuring
instrument

Mode

Cassette

Colour TV monitor

Playback still

Self-recorded tape (SP mode)
(See Note below 2)

Control

Tracking control buttons (+) or (–)

Specification

No vertical jitter of picture

1. Play a cassette which was recorded by the unit in SP

mode.

2. Press the PAUSE/STILL button to freeze the picture.
3. Look at the monitor screen and adjust (+) or (–)

TRACKING buttons so that the vertical jitter of the
picture to be minimized.

4. Play and freeze the self-recorded tape in SP mode

and make sure vertical jitter of the picture is not
noticeable.(For the LP mode put adjustment at the
same adjustment way as SP mode.)

Note:
1 The FV goes back to the it’s initial state when the unit

is put into the system controller reset mode due to
power failure, etc.
In this case, preset the FV once again.

2 Self-recorded tape is a cassette whose program was

recorded by the unit being adjusted.

1. Insert the NTSC system alignment tape(VROCPSV)

and put the unit in the SP portion playback mode.

2. Press the SLOW button on the remote control, and

playback the alignment tape in the slow mode.

3. Make for a moment short-ciucuit  P802, located at the

front side on the main PWB.
Be sure that all the fluorescent display tubes light up
into the TEST mode.

4. Look at the monitor screen and adjust the (+) or (–)

TRACKING buttons so that the there is noise disap-
pears from the screen.

5. Press the STOP button to return to normal mode.
6. Play the tape a few seconds then press the SLOW

Measuring
instrument

Mode

Cassette

Colour TV monitor

Playback

Alignment tape(VROCPSV)

Control

Tracking control buttons (+) or (–)

Specification

Minimized noise on
monitor screen

button again and make sure there is on noise in the
screen.(For the EP mode put adjustment at the same
adjustmet way as SP mode.)

1. Insert the NTSC system alignment tape(VROCPSV)

and put the unit in the SP portion playback mode.

2. Press the PAUSE/STILL button to freeze the picture.
3. Look at the monitor screen and adjust (+) or (–)

TRACKING buttons so that the vertical jitter of the
picture to be minimized.

4. Play and freeze the self-recorded tape in SP mode

and make sure vertical jitter of the picture is not
noticeable.(For the EP mode put adjustment at the
same adjustment way as SP mode.)

Note:

The FV goes back to the it’s initial state when the unit
is put into the system controller reset mode due to
power failure, etc.
In this case, preset the FV once again.

Measuring
instrument

Mode

Cassette

Colour TV monitor

Playback still

Control

Tracking control buttons (+) or (–)

Specification

No vertical jitter of picture

Alignment tape(VROCPSV)