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1.  Input a color-bar signal.

2.  Set to Service Adjustment Mode.

3.  Select DISP with  1  and  4  .

4.  Adjust values of DISP with  3  and  6  to adjust characters to the center.

5.  Write to memory by pressing  MUTING  then  ENTER  .

6.  Check to see if the text is displayed on the screen.

service   micro     disp   48

ntsc

vchp

Category

Display 

Item

Mode

Item 
Data

Signal
Type

00000000 00000000

1.  Input a monoscope signal.

2.  Activate the Service Adjustment Mode.

3.  Set the PICTURE and BRIGHTNESS to minimum.

4.  Select the SBRT item with  1  and  4  .

5.  Adjust the values of SBRT with  3  and  6  to obtain a faintly visible 

crosshatch.

6. Press MUTING  then  ENTER  to save into the memory.

1.  Input color-bar signal at 75%.

2.  Set screen to Pro Mode.

3.  Activate the Service Adjustment Mode.

4.  Set (PIC) to 100% and (COL) to 50%. 

5.  Connect an oscilloscope probe to C Board, CN705 Pin  4  Blue Out. 

6.  Select the SHUE and SCOL item with  1  and  4  .

7.  While showing the SHUE item, adjust the waveform with  1  and  4  until 

the second and third bars show the same level 
(V2 = V3 + 0.2Vpp).  

8.  While showing the SCOL item, adjust the waveform with  3  and  6  until 

the fi rst and fourth bars show the same level 
(V1 = V4 + 0.2Vpp). 

9. For Trinorma models inspect each system NTSC, PAL M & N. 

 

V1 V2 V3 V4

10. Press  MUTING  then  ENTER  to save into the memory.

1.  Input a TV mode (RF) with no signal.

2.  Connect a frequency counter to base of Q501 

(TP-25 H. DRIVE) on the A Board.

3.  Check H. Frequency for 15734 ± 400/-200 Hz.

1.  Select video 1 with no signal input.

2.  Set the conditions for a standard setting.

3.  Connect the frequency counter to TP-27 (V OUT) or CN501 pin  6

(V DY+) and ground on the A Board .

4.  Check that V. Frequency shows 60 ± 4 Hz.

1.  Input a color-bar signal and set the level to 75%.

2.  Set in Pro mode.

3.  Activate the Service Adjustment Mode. 
4.  Set GON and BON items. Using  3  and  6  set each to the following 

values. Leave RON set to “1”.

service     video     rdrv

ntsc

vchp

Category

Display 

Item

Mode

Item 
Data

Signal
Type

00000000 00000000

26

 

 R ON:   ON 

(1)

 

G ON:   OFF 

(0)

 

B ON:   OFF 

(0)

5.  Select SCON with  1  and  4  .

6.  Connect an oscilloscope probe to C Board, CN705 Pin 3  Blue Out.

7.  Adjust the value of SCON with  3  and  6  for

 

1.90 ± 0.01Vpp.

8.  Reset GON and BON values to “1”.

 

 R ON:   ON 

(1)

 

G ON:   ON 

(1)

 

B ON:   ON 

(1)

9. Press MUTING  then  ENTER  to save into the memory.
10. After adjusting SCON, if still out of xpec, use RDRV resistor as a 

fi ne adjustment.

1.  Input color-bar signal at 75%.
2.  Set screen to Pro Mode.
3.  Activate the Service Adjustment Mode.
4.  Set (PIC) to 100% and (COL) to 50%. 
5.  Connect an oscilloscope probe to C Board, CN705 Pin  4  Blue Out. 
6.  Select the SHUE and SCOL item with  1 and  4 .
7.  While showing the SHUE item, adjust the waveform with  1 and  4 

until the second and third bars show the same level 

(V2 = V3 + 0.2Vpp).  

8.  While showing the SCOL item, adjust the waveform with  3 and  6 

until the first and fourth bars show the same level 

(V1 = V4 + 0.2Vpp).  

V1 V2 V3 V4

9.  Press  MUTING  then  ENTER  to save into the memory.

1.  Input color-bar signal at 75%.
2.  Set screen to Vivid Mode.
3.  Activate the Service Adjustment Mode.
4.  Set (PIC) to 100% and (COL) to 50%. 
5.  Connect an oscilloscope probe to C Board, CN705 Pin  4  Blue Out. 
6.  Select the SHUE and SCOL item with  1 and  4 .
7.  While showing the SHUE item, adjust the waveform with  1 and  4 

until the second and third bars show the same level 

(V2 = V3 + 0.2Vpp).  

8.  While showing the SCOL item, adjust the waveform with  3 and  6 

until the first and fourth bars show the same level 

(V1 = V4 + 0.2Vpp).

V1 V2 V3 V4

9.  Press  MUTING  then  ENTER  to save into the memory.

1.  Input a crosshatch signal.
2.  Activate the Service Adjustment Mode.
3.  Select the VSIZ item with  1 and  4 .
4.  Adjust value of VPOS with  1 and  4 for the best vertical center.

5.  Press  MUTING  then  ENTER  to save into the memory.
 

Perform this adjustment after performing H. Frequency 

(Free Run) Check.

1.  Input a crosshatch signal.
2.  Activate the Service Adjustment Mode.
3.  Select the VPOS item with  1 and  4 .
4.  Adjust value of VPOS with  3 and  6 for the best vertical center.
5.  Press  MUTING  then  ENTER  to save into the memory.

Perform this adjustment after performing H. Frequency 

(Free Run) Check.

1.  Input a crosshatch signal.
2.  Activate the Service Adjustment Mode.
3.  Select the HPOS item with  1 and  4 .
4.  Adjust the value of HPOS with  3 and  6 for the best horizontal center.
5.  Press  MUTING  then  ENTER  to save into the memory.

1.  Input a monoscope signal.
2.  Activate the Service Adjustment Mode.
3.  Select HSIZ with  1 and  4 .
4.  Adjust with  3 and  6 for the best horizontal size.
5.  Press  MUTING  then  ENTER  to save into the memory.

1.  Input a crosshatch signal.

2.  Activate the Service Adjustment Mode.

3.  Select VLIN, SCOR, PAMP, and HTRP with  1  and  4 .

4.  Adjust with  3  and  6  for the best horizontal size.

5.  Press  MUTING  then  ENTER  to save into the memory.

V LINEARITY (VLIN)

V CORRECTION (SCOR)

PIN AMP (PAMP)

HORIZONTAL TRAPEZOID (HTRP)

1.  Input a crosshatch signal.

2.  Activate the Service Adjustment Mode.

3.  Select VANG, VBOW, UPIN, and LPIN with  1  and  4 .

4.  Adjust with  3  and  6  for the best picture.

5.  Press  MUTING  then  ENTER  to save into the memory.

V ANGLE (VANG)

V BOW (VBOW)

UPPER PIN (UPIN)

LOW PIN (LPIN)

1.  After completing all adjustments, press  0  then  ENTER  .

Read From Memory

service     defl     vbow    

ntsc

vchp

Category

Display 

Item

Mode

Item 
Data

Signal
Type

00000000 00000000

7

All capacitors are in µF unless otherwise noted. pF : µµF 50V or less are 

not indicated except for electrolytics and tantalums.
All electrolytics are in 50V unless otherwise specified.
All resistors are in ohms.  kΩ=1000Ω, MΩ=1000kΩ
Indication of resistance, which does not have one for rating electrical 

power, is as follows: 

Pitch : 5mm 

 

 

 

 

 

 

Rating electrical power : 

1

/

 4 

W

1

/

 4 

W in resistance, 

1

/

10 

W and 

1

/

 8 

W in chip resistance.

: nonflammable resistor

 : fusible resistor

 : internal component

 : panel designation and adjustment for repair

 : earth ground
 : earth-chassis

All variable and adjustable resistors have characteristic curve B, unless 

otherwise noted.
Readings are taken with a color-bar signal input.
Readings are taken with a 10MΩ digital multimeter.
Voltages are DC with respect to ground unless otherwise noted.
Voltage variations may be noted due to normal production tolerances.
All voltages are in V.
S : Measurement impossibility.

: B+line

: B-line (Actual measured value may be different).

: signal path (RF)

Circled numbers are waveform references.

!

!

The components identified by X in this basic schematic diagram have 

been carefully factory-selected for each set in order to satisfy regulations 

regarding X-ray radiation. Should replacement be necessary, replace 

only with the value originally used.

When replacing components identified by Y, make the necessary 

adjustments as indicated.  If the results do not meet the specified value, 

change the component identified by X and repeat the adjustment until 

the specified value is achieved. (Refer to Section 3: Safety Related 

Adjustments on Page 16.)

When replacing the parts listed in the table below, it is important to 

perform the related adjustments.

X

 

D Board

A Board

GK Board

V Board

C Board

Y