PZ-50HV2E (serv.man8). Adjustment procedures - Sharp TV Service Manual (repair manual). Page 8

VOFS (Offset voltage) adjustment
Method 1
1. Write down a adjustment value of VOFS ADJ in the factory mode.
2. Set this adjustment value to center (128).
3. Adjust VR2701 so that the voltage between K2701 (VOFS) and K2703 (SUS GND) becomes

45V.

4. Return it to the value that wrote down a adjustment value of V-OFFSET in step 1.

Method 2
1. Read the adjustment value of VOFS ADJ in the factory mode.
2. Adjust VR2701 so that the voltage between K2710 (VOFS) and K2703 (SUS GND) becomes

following voltage 

±

 0.5V.

VH (voltage for scan IC) Adjustment
Adjust so that the voltage between K2716 (VH) and K2720 (PSUS) becomes 103V 

±

 0.5V.

PSUS (=GNDH) is a floating GND and the electric potential is different from that of chassis 
GND. Be sure not to short-circuit PSUS (=GNDH) and another GND, because that may 
damage the unit.

The symptom is case of mis-adjustment
If the VH adjustment is not performed properly, dots like blinking luminance points appear. If 
deviated greatly from the right adjustment point, panel will light white.

White 100%

VR2701 (VOFS)
(Y DRIVE Assy)

VR2703 (VH)
(Y DRIVE Assy)

IC5V Adjustment
Adjust so that the voltage between K2707 (IC5V) and K2720 (PSUS) becomes 5.0V 

±

 0.1V.

PSUS (=GNDH) is a floating GND and the electric potential is different from that of chassis 
GND. Be sure not to short-circuit PSUS (=GNDH) and another GND, because that may 
damage the unit.

The symptom is case of mis-adjustment
If the VOFS Voltage adjustment is not performed properly, dots like blinking luminance points 
appear. If deviated greatly from the right adjustment point, panel will light white.

VR2702 (IC5V)
(Y DRIVE Assy)

Note : Be sure to measure between specified test points.

VOF000

0.4

25

VOF134

2.599212598

45.94488

VOF006

0.4984375

25.9375

VOF141

2.71496063

47.04724

VOF013

0.61328125

27.03125

VOF147

2.814173228

47.99213

VOF019

0.71171875

27.96875

VOF153

2.913385827

48.93701

VOF026

0.8265625

29.0625

VOF160

3.029133858

50.03937

VOF032

0.925

30

VOF166

3.128346457

50.98425

VOF038

1.0234375

30.9375

VOF172

3.227559055

51.92913

VOF045

1.13828125

32.03125

VOF179

3.343307087

53.0315

VOF051

1.23671875

32.96875

VOF185

3.442519685

53.97638

VOF058

1.3515625

34.0625

VOF191

3.541732283

54.92126

VOF064

1.45

35

VOF198

3.657480315

56.02362

VOF070

1.5484375

35.9375

VOF204

3.756692913

56.9685

VOF077

1.66328125

37.03125

VOF211

3.872440945

58.07087

VOF083

1.76171875

37.96875

VOF217

3.971653543

59.01575

VOF090

1.8765625

39.0625

VOF223

4.070866142

59.96063

VOF096

1.975

40

VOF230

4.186614173

61.06299

VOF102

2.0734375

40.9375

VOF236

4.285826772

62.00787

VOF109

2.18828125

42.03125

VOF242

4.38503937

62.95276

VOF115

2.28671875

42.96875

VOF249

4.500787402

64.05512

VOF122

2.4015625

44.0625

VOF255

4.6

65

VOF128

2.5

45