DOWNLOAD Sharp PZ-50HV2E (serv.man34) Service Manual ↓ Size: 11.32 MB | Pages: 127 in PDF or view online for FREE

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1

Drive mode selection at VIDEO

0 to 5

0

PDP

2

Drive mode selection at PC

0 to 5

3

PDP

3

Negative positive inversion mode

OFF/ON

OFF

PDP

4

Bright enhance

OFF/ON

OFF

None

5

Refresh rate at mask signal generation

50/60/70

–

None

6

Pattern mask signal generation

OFF/

OFF

PDP

7

Full mask signal generation

OFF/

OFF

PDP

Caution in the mask (generation test signal screen in the PDP inside) signal generation:
• A pattern mask and a full mask can use only either.
  Therefore, turn a full mask to OFF when uses a pattern mask. Also turn a pattern mask to OFF when uses a full mask.
• A pattern mask and a full mask are test signal screens occurring together in the PDP inside. Therefore, in the mask signal generation, it 
  cannot confirm video inputting from OSD and the outside.
  When release mask setting or change of each setting or perform the confirmation of the adjustment or external input signal, perform key 
  operation of the main unit button or the remote control unit.
  When operated something, stop the generation of the mask signal just after that for two seconds. Therefore, modification and adjustment of 
  each setting and confirmation of the external input signal are possible.

∗

 : Be careful so that there is the case that page constitution is different.

No adjustment required.

• Set slide SW according to page 244.

No adjustment required.

• Remove IC1204 (24LC04(1) SN-TBB) from the former 

PC Board to replace, and install it to the new PC Board.

1. VOFS/VH/IC5V voltage adjustment
2. Timing adjustment of pulse module

1. SUSB ground timing adjustment
2. Panel white balance adjustment

1. SUSB ground timing adjustment
2. Panel white balance adjustment

1. VRN voltage adjustment
2. Timing adjustment of pulse module

DIGITAL VIDEO
Assy

X DRIVE
Assy

Y DRIVE
Assy

MR INTERFACE
Assy

SW POWER SUPPLY
Module

Fig. 1  PC Board Location (rear side view)

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

White 100%

REF_DIG mode
in Factory mode

XSUSB ADJ
YSUSB ADJ

X-SUS-B, Y-SUS-B Adjustment
Set to the indicated value with the remote control unit.
(Refer to "Timing adjustment of control signal of X and Y Drive Assys".)

White 100%

VR3701 (VRN)
(X DRIVE Assy)

VRN (minus reset voltage adjustment)
Adjust so that the voltage between K3707 (VRN) and K3702 (SUS-GND) becomes
-300V 

±

 1.0V.

Reference : Adjustment values using the Media color-difference meter (CA-100)

Adjust the parameter in the OFFSET-DIGITAL of factory mode as follows;

PANEL R-HIGH

PANEL B-LOW

In this time, dispay uses the mask (MASK04) of factory mode.

x

295

y

306

291

300

∗

When perform the various adjustment by RS-232C control, execute a "DM0" command (release the limit of pulse number) 
beforehand.
After the adjustment completion, execute a "DM 3" command (Limit of pulse number: 64%, shipping state) by all means.