Panasonic TH-58PZ850AZ Service manual
ORDER NO. ITD0809088CE
Plasma TV
Model No. TH-58PZ850AZ
GPF11DA Chassis
© 2008 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and distribution is a violation of law.
1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace al l parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
4. When servicing, observe the original lead dress. If a short circuit is found, replace al l parts which have been overheated or
damaged by the short circuit.
5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground
such as a water pipe, as shown in Figure 1.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Reserve the AC plug in the AC outlet and repeat each of the above measure.
6. The potential at any point (TOUGH CURRENT) expressed as voltage U
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U
Note:
The limit value of U
mA d. c.
The limit value U
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the customer.
= 1.0 V,
1
= 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0
2
= 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
1
and U2, does not exceed the following values:
1
Figure 1
2
2Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically
Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor [chip] components. The following techniques should be used to help reduce the incidence of compon ent damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as al uminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
Caution
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient
to damage an ES device).
3
2.2. About lead free solder (PbF)
Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This model uses Pb Free solder in it’s manufacture due to environmental conservation issue s. For service and repair work, we’d
suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.
Caution
• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please
use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).
• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area befo re applying Pb sol der. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.
• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the
opposite side. (see figure below)
Suggested Pb free solder
There are several kinds of Pb free solder available for p urchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.
4
3 Service Navigation
3.1. Service Hint
Board Name Function Board Name Function
P Power Supply C1 Data Driver (Lower Right)
A DC-DC Converter
Speaker out, Sound Processor
AV Terminal, AV Switch
Digital Signal Processor, Micom, HDMI Interface
Peaks PRO, GC6
D Format Converter, Plasma AI, Sub-Field Processor SS Sustain Drive
K Remote receiver, Power LED SS2 Sustain connector (Upper)
S Power Switch SS3 Sustain connector (Lower)
GS SD Card Slot GH HDMI4 in
GL SD Blue LED G Front Terminal, Key Switch
HC PC in, Audio out PA Fan control
C2 Data Driver (Lower Center)
C3 Data Driver (Lower Left)
SC Scan Drive
SU Scan out (Upper)
SD Scan out (Lower)
5
3.2. Applicable signals
6
4 Specifications
Power Source AC 220 - 240 V, 50/60 Hz
Power Consumption
Average use 670 W
Standby condition 0.4 W
Plasma Display panel
Aspect Ratio 16:9
Visible screen size 147 cm (diagonal)
1,284 mm (W) × 723 mm (H)
Number of pixels 2,073,600 (1,920 (W) × 1,080 (H))
Sound
Speaker
Audio Output 31 W (15.5 W + 15.5 W), 10% THD
Headphones M3 (3.5 mm) stereo mini Jack × 1
PC signals VGA, SVGA, XGA, SXGA
Receiving Systems / Band name PAL B/G Reception of Off air broadcasts
Aerial - Rear VHF/UHF
Operating Conditions
Connection Terminals
AV1 Input
AUDIO L - R RCA PIN Type × 2 0.5 V[rms]
VIDEO RCA PIN Type × 1 1.0 V[p-p] (75 Ω)
COMPONENT Y
AV2 Input
AUDIO L - R RCA PIN Type × 2 0.5 V[rms]
VIDEO RCA PIN Type × 1 1.0 V[p-p] (75 Ω)
COMPONENT Y
AV3 Input
AUDIO L - R RCA PIN Type × 2 0.5 V[rms]
VIDEO RCA PIN Type × 1 1.0 V[p-p] (75 Ω)
S VIDEO Mini DIN 4-pin Y:1.0 V[p-p] (75 Ω) C:0.286 V[p-p] (75 Ω)
AV4 Input
AUDIO L - R RCA PIN Type × 2 0.5 V[rms]
VIDEO RCA PIN Type × 1 1.0 V[p-p] (75 Ω)
S VIDEO Mini DIN 4-pin Y:1.0 V[p-p] (75 Ω) C:0.286 V[p-p] (75 Ω)
Woofer ( 80mm) × 2pcs, Tweeter (23mm × 100mm) × 2pcs
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Digital TV 8 MHz UHF (New Zealand) free-to-air TV broadcast reception
PAL 60 Hz
M.NTSC
NTSC
Temperature: 0 °C - 40 °C
Humidity: 20 % - 80 % RH (non-condensing)
P
, PR/C
P
B/CB
B/CB
, PR/C
R
R
Playback of NTSC tape from some PAL Video recorders (VCR)
Playback from M.NTSC Video recorders (VCR)
Playback from NTSC Video recorders (VCR)
1.0 V[p-p] (including synchronization)
±0.35 V[p-p]
1.0 V[p-p] (including synchronization)
±0.35 V[p-p]
Monitor Output
AUDIO L - R RCA PIN Type × 2 0.5 V [rms] (high impedance)
VIDEO RCA PIN Type × 1 1.0 V[p-p] (75 Ω)
Others
HDMI 1-4 Input TYPE A Connectors This TV supports “HDAVI Control 3” function.
PC Input HIGH-DENSITY D-SUB 15PIN R, G, B/ 0.7 V [p-p] (75 Ω)
DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber optic
Card slot SD Card slot × 1
Dimensions (W × H × D) 1,445 mm × 949 mm × 409 mm (With Pedestal)
1,445 mm × 898 mm × 109 mm (TV only)
Mass 63.5 kg Net (With Pedestal)
59.0 kg Net (TV only)
HD, VD/TTL Level 2.0 - 5.0 V [p-p] (high impedance)
Note
• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.
• Pedestal : ST-58R4-WG (For safety approval)
7
5 Service Mode
5.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 seconds.
5.1.1. Key command
[1] button...Main items Selection in forward direction
[2] button...Main items Selection in reverse direction
[3] button...Sub items Selection in forward direction
[4] button...Sub items Selection in reverse direction
[RED] button...All Sub items Selection in forward direction
[GREEN] button...All Sub items Selection in reverse direction
[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )
8
5.1.2. Contents of adjustment mode
• Value is shown as a hexadecimal number.
• Preset value differs depending on models.
• After entering the adjustment mode, take note of the value in each item before starting adjustment.
5.1.3. How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
9
5.2. Service tool mode
5.2.1. How to access
1. Select [SRV-T OOL] in Service Mode.
2. Press [OK] button on the remote control.
5.2.2. Display of SOS History
SOS History (Number of LED blinking) indication.
From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment.
This indication except 2nd and 1st occurrence after shipment w ill be cleared by [Self-check indication and forced to factory shipment setting].
5.2.3. POWER ON TIME/COUNT
To display TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, indicated hour : minute by decimal
Count : Number of ON times by decimal
Note : This indication will not be cleared by either of the self-check or any command.
5.2.4. Exit
1. Disconnect the AC cord from wall outlet or switch off the power with the [POWER] button on the main unit.
10
5.3. Hotel mode
1. Purpose
Restrict a function for hotels.
Access command to the Hotel mode setup menu
In order to display the Hotel mode setup menu, please
enter the following command (within 2 second).
[TV] : Vol. [Down] + [REMOTE] : AV (3 times)
Then, the Hotel mode setup menu is displayed.
2. To exit the Hotel mode setup menu
Disconnect AC power cord from wall outlet or switch off
the power with the [POWER] button on the main unit.
3. Explain the Hotel mode setup menu
item Function
Hotel Mode Select hotel mode ON/OFF
Initial INPUT Select input signal modes.
Set the input, when each time power is switched
on.
Selection :
Off/Analogue/DVB/AV1/AV2/AV2S/AV3/AV3S/
COMPONENT/PC/HDMI1/HDMI2/HDMI3/HDMI4
• Off: give priority to a last memory. However,
Euro model is compulsorily set to TV.
• AVnS/AVnC: only Euro model selectable
• PC: selectable with VGA option
Initial POS Select programme number.
Selection :
Off/0 to 99
• Off: give priority to a last memory
Initial VOL level Adjust the volume when each time power is
switched on.
Selection/Range :
Off/0 to 63
• Off: give priority to a last memory
Maximum VOL
level
Button lock Select local key conditions.
Remote lock Select remote control key conditions.
Adjust maximum volume.
Range :
0 to 63
Selection :
Off/SETUP/MENU/All
• Off: altogether valid
• SETUP: only F-key is invalid
(Tuning guide(menu) can not be selected.)
• MENU: only F-key is invalid
(only Volume/Mute can be selected.)
• ALL: altogether invalid.
Selection :
Off/SETUP/MENU
• Off: altogether valid
• SETUP: only Setup menu is invalid
• MENU: Picture/Sound/Setup menu are invalid
11
6 Troubleshooting Guide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1. Check of the IIC bus lines
6.1.1. How to access
Self-check indication only:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] b utton on the remote control
for more than 3 seconds.
Self-check indication and forced to factory shipment setting:
Produce TV reception screen, and while pressing [VOLUME ( - )] button on the ma in unit, press [MENU] button on the remote con-
trol for more than 3 seconds.
6.1.2. Screen display
6.1.3. Check Point
Confirm the following parts if NG was displayed.
6.1.4. Exit
Disconnect the AC cord from wall outlet or switch off the power with the [POWER] button on the main unit.
12
6.2. Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the
defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.
13
6.3. No Power
First check point
There are following 2 states of No Power indication by power LED.
1. No lit
2. Red is lit then turns red blinking a few seconds later. (See 6.2.)
14
6.4. No Picture
15
6.5. Local screen failure
Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.
Fig-1
16
7 Disassembly and Assembly Instructions
7.1. Remove the Rear cover
1. See Service Hint. (Section 3)
7.2. Remove the Fan unit
1. Unlock the cable clampers to free the cable.
2. Remove the screws (×3 ).
3. Remove the relay connectors and remove the Fan unit.
4. Remove the screw (×1 ) on the back side.
5. Remove the Fan.
7.3. Remove the PA-Board
1. Disconnect the connectors (PA5, PA6, PA8, PA33, PA35,
PA36 and PA37).
2. Remove the screws (×2 ).
3. Remove the PA-Board.
7.4. Remove the P-Board
Caution:
To remove P.C.B. wait 1 minute after power was off for discharge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (P2, P6, P7, P9, P11, P12 and
P25).
3. Remove the screws (×8 ) and remove the P-Board
unit.
4. Remove the screws (×34 ) on the back side.
17
5. Disconnect the connectors (P51-P52, P53-P54 and P55P56).
6. Remove the screws (×12 ).
B, C, D) is set to the position of each hole of the P(Multi)Board and the P(Sus)-Board and then assemble them.
( marks indicate setting positions.)
P-Board backside
7. Remove the molding props (×6 ).
8. Remove the P(Multi)-Board.
9. Remove the molding props (×6 ).
10. Remove the P(Sus)-Board.
7.5. Remove the Rear Terminal
cover
1. Remove the screws (×2 , ×3 , ×1 ).
2. Remove the Rear Terminal cover.
Note:
When assembling the P(Multi)-Board and the P(Sus)Board, the position of each hole of the insulation sheets(A,
18
7.6. Remove the tuner unit
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (A1, A3, A5, A6, A7, A8, A9,
A11, A51, A53, H11 and H12).
3. Remove the screws (×4 ) and remove the tuner unit.
7.8. Remove the HC-Board
1. Remove the tuner unit. (See section 7.6.)
2. Disconnect the bridge connectors (A12, A13 and A14).
3. Remove the screws (×2 ) and remove the HC-Board.
7.9. Remove the Speaker box
7.7. Remove the A-Board
1. Remove the tuner unit. (See section 7.6.)
2. Remove the bridge connector (A12, A13 and A14).
3. Remove the screws (×8 ) and remove the A-Board.
(Woofer/L, Woofer/R)
1. Unlock the cable clampers to free the cable.
2. Disconnect the relay connectors.
3. Remove the screws (×4 each) and remove the
Speaker box (Woofer/L, Woofer/R).
19
4. Remove the screws (×3 ) and remove the Woofer
holder L.
7.10. Remove the SU-Board
1. Disconnect the flexible cables (SU1B, SU2B, SU3B,
SU4B and SU5B) connected to the SU-Board.
2. Remove the flexible cable (SU11-SD11) and the bridge
connector (SC41-SU41).
3. Remove the screws (×3 , ×3 ) and remove the SU-
Board.
5. Remove the screws (×3 ) and remove the Woofer
holder R.
7.11. Remove the SD-Board
1. Disconnect the flexible cables (SD1B, SD2B, SD3B,
SD4B and SD5B) connected to the SD-Board.
2. Disconnect the flexible cable (SU11-SD11) and the bridge
connectors (SC42-SD42 and SC46-SD46).
3. Remove the screws (×3 , ×3 ) and remove the SD-
Board.
20
7.12. Remove the SC-Board
1. Remove the SU-Board and SD-Board. (See section 7.10.
and 7.11.)
2. Disconnect the connector (SC2).
3. Disconnect the flexible cable (SC20).
4. Remove the screws (×8 ) and remove the SC-Board.
7.13. Remove the SS-Board
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (SS11, SS12, SS33 and
SS34) and the bridge connectors (SS21-SS02 and SS22SS03).
3. Disconnect the flexible cables (SS54 and SS56).
4. Remove the screws (×6 ) and remove the SS-Board.
7.14. Remove the SS2-Board
1. Disconnect the bridge connector (SS21-SS02) and disconnect the flexible cable (SS52).
2. Remove the screws (×2 ) and remove the SS2-Board.
7.15. Remove the SS3-Board
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (SS35).
3. Disconnect the flexible cable (SS57) and disconnect the
bridge cable (SS22 - SS03).
4. Remove the screws (×4 ) and remove the SS3-Board.
21
7.16. Remove the D-Board
1. Remove the tuner unit. (See section 7.6. )
2. Disconnect the connectors (D3, D5 and D25).
3. Disconnect the flexible cables (D20, D31, D32 and D33).
4. Remove the screws (×4 ) and remove the D-Board.
7.17. Remove the C1-Board
1. Remove the tuner unit. (See section 7.6. )
2. Remove the Speaker box (Woofer/R). (See section 7.9.)
3. Remove the DD-Heat-sink fastening screws (×10 ).
4. Remove the DD-Heat-sink (×5).
7.18. Remove the C2-Board
1. Remove the tuner unit. (See section 7.6.)
2. Remove the Speaker box (Woofer/L). (See section 7.9.)
3. Remove the DD-Heat-sink fastening screws (×10 ).
4. Remove the DD-Heat-sink (×5).
5. Disconnect the flexible cables (CB6, CB7, CB8, CB9 and
CB10).
6. Disconnect the flexible cables (C20, C21, C22 and C26).
7. Remove the screws (×4 ) and remove the C2-Board.
5. Disconnect the flexible cables (CB1, CB2, CB3, CB4 and
CB5).
6. Disconnect the flexible cables (C10 and C11).
7. Remove the screws (×5 ) and remove the C1-Board.
7.19. Remove the C3-Board
1. Remove the Speaker box (Woofer/L). (See section 7.9.)
2. Remove the DD-Heat-sink fastening screws (×10 ).
3. Remove the DD-Heat-sink (×5).
4. Disconnect the flexible cables (CB11, CB12, CB13, CB14
and CB15).
5. Disconnect the flexible cable (C36).
6. Disconnect the connectors (C33 and C35).
22
7. Remove the screws (×5 ) and remove the C3-Board.
7.20. Remove the Speaker
(Squawker)
1. Remove the screws (×4 ) and remove the Bottom support metal.
7.21. Remove the Front bracket
1. Remove the Bottom support metal. (See section 7.20.)
2. Unlock the cable clampers to free the cable.
3. Disconnect the connectors (GS02, GS09 and GH11).
4. Disconnect the connector (A51). (See section 7.6.)
5. Remove the screws (×3 , ×2 ) and remove the
Front bracket.
7.22. Remove the G-Board, GSBoard and GH-Board
1. Remove the Front bracket. (See section 7.21.)
2. Remove the screws (×5 ).
2. Disconnect the relay connectors.
3. Remove the screws (×2 each).
4. Remove the Speaker (Squawker/L, Squawker/R).
3. Remove the screws (×4 ).
4. Remove the Front shield case front and the Front shield
top.
5. Remove the GH-Board.
6. Remove the screw (×1 ) and remove the GS-Board.
7. Remove the screws (×3 ).
8. Disconnect the connector (G51) and remove the GBoard.
23
7.23. Remove the stand brackets
7.24. Remove the Plasma panel sec-
and rear mounting metals
1. Remove the plasma panel section from the servicing
stand and lay on a flat surface such as a table (covered)
with the plasma panel surface facing downward.
2. Remove the stand brackets (left, right) fastening screw
(×1 each).
3. Remove the rear mounting metals (left, right) fastening
screws (×4 each).
4. Remove the stand brackets and rear mounting metals.
tion from the Cabinet assy
(glass)
1. Remove the stand brackets (left, right) fastening screw
(×1 each).
2. Remove the cabinet assy and the plasma panel fastening
screws (×6 , ×12 ).
3. For leaving the plasma panel from the front frame, pull the
bottom of the cabinet assy forward, lift, and remove.
5. Remove the fastening screws (×4 each).
6. Remove the stand brackets fr om re ar moun ting metals.
24
4. Remove the spacers and spacer rings (×6 ).
5. Remove the screws (×2 ) and remove the S-Board
unit.
6. Remove the screw (×1 ) and remove the S-Board.
Caution:
• Please confirm the installation place of Spacer and
Spacer Ring when you exchange the Plasma Panel, and
install Spacer and Spacer Ring in an original installation
place after exchanging the Plasma Panel.
7.25. Remove the K-Board and SBoard
1. Remove the Cabinet assy. (See section 7.24.)
2. Remove the Speaker (Squawker /L). (See section 7.20.)
3. Remove the screws (×5 ) and remove the Bottom
shield L.
4. Disconnect the connector (S1).
7. Remove the screws (×2 ).
8. Remove the K-Board and disconnect the connector (K1).
25
7.26. Remove the GL-Board
1. Remove the Cabinet assy. (See section 7.24.)
2. Remove the S p ea ke r (Squawker /R). (See section 7.20.)
3. Remove the screws (×5 ) and remove the Bottom
shield R.
4. Remove the screws (×8 ) and remove the Bottom
plate.
5. Remove the screws (×2 ) and remove the GL-Board
and disconnect the connector (GL02).
7.27. Replace the plasma panel (finished)
1. Place the new plasma panel (finished) on the flat surface
of the table (covered by a soft cloth), with the plasma
panel surface facing downward.
2. Attach the C1-Board, C2-Board and the C3-Board, connect the flexible cables (×15) from the plasma panel to the
C1-Board, C2-Board and the C3-Board, and fit the flexible cable holders.
3. Attach the Hooks (left, right) and fit the stand brackets (L,
R) to the new plasma panel.
4. Place the plasma panel section on the servicing stand.
5. Attach the cabinet assy and each P.C.Board and so on, to
the new plasma panel.
*When fitting the cabinet assy, be careful not to allow
any debris, dust or handling residue to remain
between the front glass and plasma panel.
26
8 Measurements and Adjustments
8.1. Adjustment Procedure
8.1.1. Driver Set-up
8.1.1.1. Item / Preparation
1. Input a white signal to plasma video input.
2. Set the picture controls as foll o w s.
Picture menu : Dynamic
PNR : OFF
Aspect : 16:9
Caution
1. First perform Vsus adjustment.
2. Confirmation of Vscn voltage should be performed after
confirmation of Vad adjustment.
When Vad= -135V, Voltage of Vscn is 10V ±4V.
8.1.1.2. Adjustments
Adjust driver section voltages referring the panel data on the
panel data label.
Check or adjust the following voltages with the multimeter.
Name Test Point Voltage Volume Remarks
Vsus TPVSUS
(SS)
Ve TPVE (SS) Ve ± 1V VR16000
Vset TPVSET
(SC)
Vad TPVAD (SC) -135V ± 1V VR16600
Vscn TPVSCN
(SC)
Vda TPVDA (SS) 75V + 1V, -2V Fixed
*See the Panel label.
Vsus ± 2V VR251 (P) *
*
(SS)
325V ± 10V Fixed
(SC)
Vad+145V ± 4V Fixed
27
8.1.2. Initialization Pulse Adjust
1. Input the White signal to plasma video input.
2. Set the picture controls as follows.
Picture menu : Dynamic
PNR : OFF
Aspect : 16:9
3. Connect Oscilloscope to TPSC1 (SC).
Check the voltage (T2) at 100 us period on the down slop.
Test point Volume Level
T2 TPSC1 (SC) VR16602 (SC) 250 V ± 10 V
8.1.3. P.C.B. (Printed Circuit Board) exchange
8.1.3.1. Caution
1. To remove P.C.B., wait 1 minute after power was off for discharge from electrolysis capacitors.
8.1.3.2. Quick adjustment after P.C.B. exchange
Adjust the following voltages with the multimeter.
P.C.B. Name Test Point Voltage Volume Remarks
P Board Vsus TPVSUS (SS) Vsus ± 2V VR251 (P) *
SC Board Vad TPVAD (SC) -135V ± 1V VR16600 (SC)
SS Board Ve TPVE (SS) Ve ± 1V VR16000 (SS) *
A, D Board White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals
*See the Panel label.
Caution:
Absolutely do not reduce Vsus below Ve not to damage the P.C.B.
28
8.1.4. Adjustment Volume Location
8.1.5. Test Point Location
29
30
Loading...