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1.  Input color-bar signal at 75%.

2.  Activate the Service Adjustment Mode.

3.  Set (PIC) to Max and (COL) to 50%. 

4.  Connect an oscilloscope probe to C Board, CN705Pin  4  Blue Out. 

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

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

until the second and third bars show the same level 
(V2 = V3 < 0.15Vp-p).  

7.  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 < 0.15Vp-p).  Increase 1 step after adjustment.

 

V1 V2 V3 V4

8. 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 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

Green

Red

ENTER

0

service     defl     vbow

ntsc

vchp

Category

Display 

Item

Mode

Item 
Data

Signal
Type

00000000 00000000

7

C Board

V Board

HS Board

A Board

GK Board

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 specifi ed.

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.

: nonfl ammable 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.

!

 symbol are critical for safety. Replace 

The components identifi ed 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 identifi ed by Y, make the necessary 
adjustments as indicated.  If the results do not meet the specifi ed value, 
change the component identifi ed by X and repeat the adjustment until 
the specifi ed value is achieved. 

(Refer to R530 and R531 adjustment on page 16.)

When replacing the parts listed in the table below, it is important to 
perform the related adjustments.

R550, T503, T504, D519,

IC501, R533, D521, R532,

D520, C531, R529, R530,

R531, C532

R530, R531

GK BOARD:
IC600, PH602

Part Replaced (Y)

Adjustment (X)

Video processor
CXA2154/5AS

3L comb
TC90A69.

PinP Proc.
M65665FP.

Audio SW
NJM2750

V-Out

AN5522 (24-27”)
STV9379(32-36”)

L.E.D.

Menu
CTRL

I.R.

H-Out

2SD2634(24-27”)
2SD2645(32-36”)

L

R

Stereo Tuner

FRONT

V2

L

R

AUDIO OUT

DY

H.Drive

2

2

2

2

S

4

2

I2C Bus

2

Vd

Hp

E/W

2

Pin

Out

2SC4159

+13v
Rect.

-13v
Rect.

OCP

Horiz.

Vert.

2

Y/C

Sub 

det-Out

200v
Rect.

FBT

FBT

3

RGB

3

RGB

V1

L

R

REAR

V4

Y

U V

3

2

Mircoprocessor

M306V5ME

Y25RSA
Y29RSA
Y34RSA
Y38RSA

24”-NX4011
27”-NX4521
32-36”-NX4600

2

CVBS,FSC

2

Y/C

3

YUV

P board

Iprot

3D comb
MN82832.

C

Yout

BC board

Mono Tuner

L

S

Det. out

REAR

V3

L

R

2

L R

RGB Driver
TDA6108

2

SR
T

T

A

1226

N

Yin

V

LR

MOUT

V5

L R

Y

U V

YUV SW
NJM2283

3

From 
GK Brd

From 
GK Brd

From 
GK Brd

T o 
Y Brd
YUV

T o 
GK Brd
L,R Audio

HOT

DF/QP

DF/QP
V Board

VM

DF