Zenith P50W26 Service Manual

SERVICE MANUAL

Product Type: PLASMA
Chassis: RF-02CA
Manual Series: PV154
Manual Part #: 923-03499
Model Line: E
Product Year: 2002

12/12/02

PRELIMINARY

-

Model Series:

P50W26
P50W26B

-

Made/Printed
in the U.S.A.

CONTENTS

OVERVIEW................................................. 5

USERS MENUS ............................................ 9

SERVICING .............................................. 12

PARTS .................................................... 23

DIAGRAMS ...................................................... 25

SCHEMATICS .................................................... 33

Published September 2002

by Technical Publications

Zenith Electronics Corporation

201 James Record Road

Huntsville, Alabama 35824-1513

Copyright  2002 by Zenith Electronics Corporation

PRODUCT SAFETY GUIDELINES

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-visual service
technicians.

When servicing this product, under no circumstances should the original
design be modified or altered without permission from Zenith Electronics
Corporation. All components should be replaced only with types identical to
those in the original circuit and their physical location, wiring and lead dress
must conform to original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire hazard.
These components are indicated by the letter “x” included in their component
designators and are required to maintain safe performance. No deviations are
allowed without prior approval by Zenith Electronics Corporation.

Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into
the set is not delayed until the new service literature is printed.

CAUTION: Do not attempt to modify this product in any way. Never perform
customized installations without manufacturer’s approval. Unauthorized
modifications will not only void the warranty, but may lead to property damage
or user injury.

Service work should be performed only after you are thoroughly familiar with
these safety checks and servicing guidelines.

GRAPHIC SYMBOLS

The exclamation point within an equilateral triangle is intended
to alert the service personnel to important safety information in
the service literature.

The lightning flash with arrowhead symbol within an equilateral
triangle is intended to alert the service personnel to the presence
of noninsulated “dangerous voltage” that may be of sufficient
magnitude to constitute a risk of electric shock.

The pictorial representation of a fuse and its rating within an
equilateral triangle is intended to convey to the service personnel
the following fuse replacement caution notice:
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,
REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED
NEAR EACH FUSE.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely
fitting shelf space over, or close to, a heat duct, or in the path of heated
air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations
where dew is a factor, near steam radiators where steam leakage is a factor,
etc.

3. Avoid placement where draperies may obstruct venting. The customer
should also avoid the use of decorative scarves or other coverings that
might obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit
must follow the factory-approved mounting instructions. A product mounted
to a shelf or platform must retain its original feet (or the equivalent
thickness in spacers) to provide adequate air flow across the bottom. Bolts
or screws used for fasteners must not touch any parts or wiring. Perform
leakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a
tilted position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart.
Caution the customer on the hazards of trying to roll a cart with small
casters across thresholds or deep pile carpets.

7. Caution customers against using a cart or stand that has not been listed
by Underwriters Laboratories, Inc. for use with its specific model of
television receiver or generically approved for use with TVs of the same or
larger screen size.

8. Caution customers against using extension cords. Explain that a forest of
extensions, sprouting from a single outlet, can lead to disastrous
consequences to home and family.

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock.
After the original service problem has been corrected, make a check of the
following:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of
adjacent component shorts. This is especially important on items trans­ported to and from the repair shop.

2. Verify that all protective devices such as insulators, barriers, covers,
shields, strain reliefs, power supply cords, and other hardware have been
reinstalled per the original design. Be sure that the safety purpose of the
polarized line plug has not been defeated.

3. Soldering must be inspected to discover possible cold solder joints, solder
splashes, or sharp solder points. Be certain to remove all loose foreign
particles.

4. Check for physical evidence of damage or deterioration to parts and compo­nents, for frayed leads or damaged insulation (including the AC cord), and
replace if necessary.

5. No lead or component should touch a receiving tube or a resistor rated at
1 watt or more. Lead tension around protruding metal surfaces must be
avoided.

6. After reassembly of the set, always perform an AC leakage test on all exposed
metallic parts of the cabinet (the channel selector knobs, antenna terminals,
handle and screws) to be sure that set is safe to operate without danger of
electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS
TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in
the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by
a .15 mfd 150V AC type capacitor between a known good earth ground
water pipe, conduit, etc.) and the exposed metallic parts, one at a time.
Measure the AC voltage across the combination of 1500 ohm resistor and
.15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor
and repeat AC voltage measurements for each exposed metallic part. Voltage
measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp
AC. Any value exceeding this limit constitutes a potential shock hazard and
must be corrected immediately.

PV154 - 923-03499 2 P50W26 - SAFETY

TABLE OF CONTENTS

OVERVIEW ........................................................ 5

GENERAL INFO ........................................... 5

SPECIFICATIONS ..................................... 5

INSTALLATION........................................ 5

CONNECTING A COMPUTER ....................... 5

FRONT ................................................... 6

BACK..................................................... 6

REMOTE CONTROL .................................... 7

SERVICING ................................................ 9

OVERVIEW ............................................. 9

RGB AUTO CUT-OFF & MIN BIAS ................. 9

MAX BIAS ADJUSTMENT ........................... 9

POWER PCB ASSY VOLTAGE ....................... 9

ADJUSTMENT OF WHITE BALANCE ............ 1 0

DDC DATA INPUT ................................... 1 1

COMPONENT OFF-SET ADJUSTMENT .......... 11

EXTERNAL CONTROL .................................. 12

OVERVIEW ........................................... 1 2

CONNECTION ........................................ 12

RS-232C CONFIGURATIONS ..................... 12

SET ID ................................................. 12

COMMUNICATION .................................. 13

NO VIDEO 1 .......................................... 18

NO SOUND ........................................... 1 8

TROUBLESHOOTING................................... 19

NO VIDEO 2 .......................................... 19

NO SOUND ........................................... 1 9

MODEL PARTS ....................................... 2 0

COMPONENT PARTS ............................... 20

DIAGRAMS ............................................... 27

P50W26 EXPLODED VIEW ....................... 2 7

P50W26 INTERCONNECT DIAGRAM .......... 28

P50W26 BLOCK DIAGRAM ...................... 29

P50W26 MAIN PCB ............................... 30

P50W26 OTHER PCBS ............................ 31

P50W26 OTHER PCBS ............................ 32

SCHEMATICS ............................................ 33

CIRCUIT .............................................. 33

CIRCUIT .............................................. 34

CIRCUIT .............................................. 35

CIRCUIT .............................................. 36

CIRCUIT .............................................. 37

CIRCUIT .............................................. 38

CIRCUIT .............................................. 39

CIRCUIT .............................................. 40

CIRCUIT .............................................. 41

PV154 - 923-03499 3 P50W26 - TOC

Overview

OVERVIEW

GENERAL INFO

SPECIFICATIONS

Screen Size 50 in diagonal
Aspect Ratio 16:9 (width:height)
Max Resolution 1366 x 768p
Peak Brightness 230 cd/m (with Filter);

Module: 510 cd/m2
Contrast Ratio 600:1
Pixel Pitch 0.270 (H) x 0.810 (V)
Viewing Angle 160° horizontally and ver-

tically
Displayable Colors 16.77 million
Color Temperature 8000K Fixed
Display Frequency 15.73 to 68kHz (H); 50 to

80 kHz (V)
Format Conversion Intelligent Image Scaling

to 1280 x 720p
Aspect Ratio Correction 16:9, 4:3 Zoom
Scan Converter Faroudja, Sage
Multi-Lingual Menus English, French, Spanish,

Korean, Portugese
Operating Humidity Range 20–80%
Operating Max Altitude 2000m
Operating Temperature Minus 5 °C – 45 °C
Temperature Range Minus 20 °C – 60 °C
Power Consumption 560 Watts
Power Source 120V 60Hz
*Designs and specifications are subject to change

without notice.

INSTALLATION

It is recommended that this product only be used at an
altitude of less than 6562 feet (2000m) to get the best
quality picture and sound. This plasma display is designed
to be mounted horizontally (wide viewing).

4inch

4inch4inch

4inch

- Your P50W26, P50W26B models (Monitor) can be
installed on a wall or on a desktop pedestal. Wall mount

1.18inch

and stands are optional and not supplied with the
monitor. (For further information, refer to the optional
Tilt/Wall Mounting Bracket Installation and Setup Guide.)

Install this monitor only in a location where adequate
ventilation is available. Minimum allowable clearances for
adequate ventilation are show in the picture.

CONNECTING A COMPUTER

Connect the video output of the PC to the Monitor RGB­PC INPUT (VGA/SVGA/XGA) RGB-DTV INPUT (480p/720p/
1080i) using a standard shielded VGA cable. Connect
the audio out from the PC to the Audio jacks on the
Monitor (Audio cables are not included with the Monitor).
Set the computer video output to SXGA (1280x1024) or
lower resolution. If the video output of the PC is not
compatible with the Monitor, no picture will appear on
the Monitor (see chart). Use the video/pc button on the
remote control to select the RGB source. To set up this
monitor in a PC Windows environment select Standard
monitor. This monitor does not support Plug and Play
function.

Note: Avoid prolonged display of a still image, as it may

cause a permanent image to remain even after you

change the image.

P42W22 Computer Video

Resolution

640x350

640x400

640x480

800x600

832x624 49.725 74.55

1024x768

Horizontal Frequency

(KHz)

31.468 70.09

37.861 85.08

31.469 70.08

37.927 85.03

31.469 59.94

35.000 66.66

37.861 72.80

37.500 75.00

43.269 85.00

45.913 90.03

53.011 100.04

64.062 120.00

35.156 56.25

37.879 60.31

48.077 72.18

46.875 75.00

53.674 85.06

56.000 90.00

64.016 100.00

48.363 60.00

56.476 70.06

60.023 75.02

68.677 84.99

Vertical Frequency

(KHz)

PV154 - 923-03499 5 P50W26 - OVERVIEW

OVERVIEW

FRONT

Power Standby Indicator
Illuminates red in standby
mode, green when the
Monitor is on.

Remote Control Sensor

Input Select

INPUT

MENU

VOL

SELECT

ON/OFF

Menu

Channel

Volume

Main Power Button

BACK

YPBP

COMPONENT

(DVD/DTV INPUT)

R

AUDIO

R

AUDIO

INPUT

(MONO)

AUDIO

L

()()

R

(8‰)EXTERNAL SPEAKER

AC INPUT

R

AUDIO

INPUT

VIDEO

INPUT

S-VIDEO

1 2 3 4785 6 1

1. EXTERNAL SPEAKER (8 ohm output)
Connect to the optional external speaker(s).

2. POWER CORD SOCKET
This monitor operates on an AC power. The voltage is
indicated on the Specifications page. Never attempt to
operate the monitor on DC power.

3. AUDIO/VIDEO INPUT JACKS
Connect audio/video out from external equipment to these
jacks.

ON/ OFF

L

RGB1 INPUT

CONTROL

LOCK

REMOTE
CONTROL

RGB1 OUTPUT

(PC/DTV OUTPUT)

AUDIO
INPUT

(PC/DTV INPUT)

RGB2 INPUT

(DIGITALRGB INPUT)

4. COMPONENT INPUT JACKS

480i/480p/720p/1080i

5. CONTROL LOCK Locks the front keyboard. The remote
must be used to control the TV.

6. RGB OUTPUT
Loop out to another monitor.

7. RGB INPUT
RGB signal input. Accepts VGA or DVI inputs.

8. RS-232C INPUT
Service port.

RS-232C INPUT

(CONTROL/SERVICE)

()()

L

EXTERNAL SPEAKER

(8 )

PV154 - 923-03499 6 P50W26 - OVERVIEW

REMOTE CONTROL

OVERVIEW

Switches the Monitor on from

POWER

standby or off to standby.

SLEEP

Sets the sleep timer.

APC

Adjusts the factory preset picture

accordingtotheroom.

ARC

Changes the picture format.

PIP

Switchesthesubpictureonoroff.

SWAP

Exchanges main and sub picture

images.

MENU

Displays on screen menus one by one.

Exits the current menu.

Memorizes menu changes.

NUMBER buttons

POWER

SLEEP INPUT SELECT

APC DASP

ARC PIP ARC

PIP

SWAP

MENU MUTE

VOL

123

456

7809

TWIN PICTURE

SUB INPUT

OK

VOL

INPUT SELECT
Selects:

VIDEO, S-VIDEO, RGB1/2 or

COMPONENT mode.

DASP
To select the sound appropriate to
your viewing program character:

FLAT, SPORTS, CINEMA, MUSIC,or
USER

PIP ARC
Changes the PIP picture format.

TWIN PICTURE

SUB INPUT
Selects the input mode for the sub
picture.

MUTE
Switchesthesoundonoroff.

OK

/

Selects a menu option.

/ (Volume button)
Increases/decreases sound level.
Adjusts menu settings.

Adjusts the sub picture size.

WIN. SIZE

WIN.POSITION

Moves the sub picture.

SPLIT ZOOM

Enlarge the screen with regular

ration.

ZOOM-/ZOOM+

Enlarges or reduces

the main picture size.

POWER STOP

REW

PLAY FF

WIN.SIZE

WIN.POSITION

ZOOM -

ZOOM +

P/STILL

REC

SPLIT ZOOM

VCR BUTTONS

Controls some video cassette
recorder.

PV154 - 923-03499 7 P50W26 - OVERVIEW

SERVICING

SERVICING

OVERVIEW

Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.

Adjustments must be done in the correct order. The
adjustment must be performed at 25±5
and 65±10% of relative humidity.

The input voltage of the receiver must maintain
110~240V, 50/60Hz while adjusting. Operate the receiver
for about 15 minutes prior to the adjustment with 100%
white pattern (06CH), or white condition in HEAT-RUN
mode.

Enter into HEAT-RUN mode. Press the POWER ON KEY on
R/C for adjustment. OSD display HEAT-RUN WHITE and
screen display 100% full WHITE PATTERN. Set is activated
HEAT-RUN without signal generator in this mode. Single
color pattern of HEAT-RUN mode uses to check the PANEL
(RED/BLUE/GREEN).

Caution: If you turn on a still screen more than 20 minutes,

an afterinage may occur in the black level part of
the screen. (Especially Digital Cross Hatch Pattern),
a afterimage may be occur in the black level part
of the screen.

RGB AUTO CUT-OFF & MIN BIAS

1) If the PDP Module or Power Board was replaced, ad­just the Power PCB Assy Voltage prior to any other
adjustment.

2) Input Full Back (0 Gray) signal which generated from
Pattern Generator into Component input and RGB1
Input part.

3) Press POWER ON KEY on R/C for adjustment and select
AUTO-CUT(Cut-off Auto Adjustment).

4) Press Vol. + key.

5) Screen adjustment starts with Full Black screen. Origi­nal Window screen will be presented about 5-6 sec­onds later. And if (OK OSD) appears on the screen,
then the Auto Cut-off and Min-Bias adjustment will
have been completed.

o

C of temperature

(5) After adjustment, press ¥ key to save adjustment
and come out of the adjustment mode.

To check whether the circuit adjustment is operated well
or not:

1) Display RGB1 to the Main picture, Component
input to the Sub picture in the TWIN PICTURE.

2) To check the MIN-Bias, input Full Black (0 gray) sig­nal into Component input and RGB1 input part at the
same time in the Pattern Generator.

3) To check the MAX-Bias, input Full White (255 gray)
signal into Component input and RGB1 input part
at the same time in the Pattern Generator.

4) Compare Black Level with White Level by eye. And
if there is no Level difference, the adjustment is
completed.

Data value, which adjusted in the board, is valid until
the VSC Board is dissued and must be protected. For the
protection of data, Micom does not permit any more
adjustment after completion.

In case of re-adjustment, operate First Value Setting.
Each PCB Assy must be checked by Check JIG Set before
assembly. (Especially, be careful Power PCB Assy which
can cause fatal Damage to PDP Module.)

POWER PCB ASSY VOLTAGE

VA ADJUSTMENT

1) Test Equipment : D.M.M 1EA

2) After receiving 100% white pattern, HEAT RUN.

3) Connect + terminal of D.M.M to Va pin of P805

and connect Ð terminal to GND pin of P805.

4) After turning the VR4, voltage of D.M.M adjust-

ment as same as Va voltage which on label of panel
Right/Top. (Deviation : ±0.5V)

VS ADJUSTMENT

1) Connect + terminal of the D.M.M to Vs pin of

P805 and connect - terminal to GND pin of P805.

2) After turning the VR1, voltage of D.M.M ad-

justment as same as Vs voltage which on label
of panel Right/Top. (Deviation : ±0.5V)

MAX BIAS ADJUSTMENT

1) Input Full White (255 Gray) signal which generated
from Pattern Generator into Component input and
RGB1 Input.

2) Press POWER ON KEY on R/C for adjustment and select
MAX-BIAS.

3) Press Vol. + key.

4) Original Full White screen will be presented about
1-2 seconds later. And if (OK OSD) appears on the
screen then the Min-Bias adjustment will have been
completed.

PV154 - 923-03499 9 P50W26 - SERVICING

SERVICING

Va voltage

adjustment

variable resistor

VR4

VR1

<Fig 1> Connection Diagram of Power Adjustment

ADJUSTMENT OF WHITE BALANCE

REQUIRED EQUIPMENT

Color analyzer (CA-100 or same product)

CONNECTION DIAGRAMS (MANUAL ADJUSTMENT)

COLOR

ANALYZER

R-L 70
G-L 70
R-M 128
G-M 128
R-H 216
G-H 216

High Light

216 Gray Level

135 140Cd/

§‡

CA-100

RGB Signal Input

PDP MONITOR

MSPG-2100 or

<Fig 2> Connection Diagram of Manual

Adjustment(High Light)

COLOR

ANALYZER

R-L 70
G-L 70
R-M 128
G-M 128
R-H 216
G-H 216

Middle Light

128 Gray Level

70~75Cd/

§‡

CA-100

RGB Signal Input

PDP MONITOR

MSPG-2100 or

Fig 3> Connection Diagram of Manual

Adjustment(Middle Light)

DMM

Window

MSTG-5200

Window

MSTG-5200

COLOR

ANALYZER

R-L 70
G-L 70
R-M 128
G-M 128
R-H 216
G-H 216

Low Light

70 Gray Level

20~25Cd/§‡

CA-100

RGB Signal Input

PDP MONITOR

Window

MSPG-2100 or

MSTG-5200

<Fig 4> Connection Diagram of Manual

Adjustment(Low Light)

ADJUSTMENT OF WHITE BALANCE

Operate the Zero-calibration of the CA-100, then stick
sensor to PDP module surface when you adjust. For
manual adjustment, it is also possible by the following
sequence.

1) Select WHITE PATTERN of HEAT RUN mode by press­ing POWER ON KEY on remote control for adjust­ment then operate HEAT RUN more than 15 minute.

2) Supply 216Gray, 128Gray, 70Gray Level, 50% size
length and breadth signal to RGB1 input. (Refer
to Fig 2,3,4)

3) W/B adjustment must be adjusted once and follow
the sequence of Low Light —> Middle Light —>
High Light and then save the adjustment value
with o Key.

4) To adjust Low Light, stick sensor to Gray Level(or
20~25 Cd/m2) Pattern, press ADJ Key on R/C for
adjustment and press v, x on R/C in adjustment
mode to select R-L or G-L, press VOL +, - Key and
adjust it until color coordination becomes as be­low.

X: 0.290±0.003, Y: 0.300±0.003

Color temperature: 8, 500oK±500oK

5) To adjust Middle Light , stick sensor to Gray Level
(or 70~75 Cd/m2) Pattern, press ADJ Key on R/
C for adjustment and press v, x on R/C in adjust­ment mode to select R-M or G-M, press VOL +, ­Key and adjust it until color coordination becomes
as below.

X: 0.290±0.003, Y: 0.300±0.003

Color temperature: 8, 500oK±500oK

6) To adjust High Light, stick sensor to Gray Level(or
135-140 Cd/m2) Pattern, press ADJ Key on the
R/C for adjustment and press v, x on R/C in ad­justment mode to select R-L or G-L, press VOL +,

- Key and adjust it until color coordination be­comes as below.

PV154 - 923-03499 10 P50W26 - SERVICING

SERVICING

X: 0.290±0.003, Y: 0.300±0.003

Color temperature: 8, 500¡K±500¡K

7) Exit adjustment mode using o Key.

DDC DATA INPUT

REQUIRED TEST EQUIPMENT

1) A jig for adjusting PC, DDC. (PC serial to D­sub. Connection equipment)

2) S/W for writing DDC(EDID data write & read)

3) D-Sub 15P cable, D-Sub to DVI Connector (Con­nect to DVI Jack)

PREPARATION FOR ADJUSTMENT

1) Set devices as above and turn the PC, jig on.

2) Put S/W for writing DDC (EDID data write &
read) into operation. (operated in DOS mode.)

SEQUENCE OF ADJUSTMENT

DDC DATA INPUT FOR ANALOG-RGB

1) Put the set on the table and turn the power on.

2) Connect PC Serial to D-sub 15P Cable of JIG for
DDC adjustment to RGB1 terminal (D-Sub 15Pin).

3) Operate S/W for DDC record and select DDC Data for
analog RGB in Model Menu.

4) Operate EDID Write command.

5) Operate EDID Read command and check whether
Check Sum is OK.

6) If Check Sum is NG, repeat 3-4.

7) If Check Sum is OK, DDC Data for Analog-RGB input
is completed.

COMPONENT OFF-SET ADJUSTMENT

1) Input the signal to HD-STB(SK-010T) and receive 14Ch.

2) Input Video signal and Component 720P, 1080i sig­nal of HD-STB into AV1 and Component input part.

3) Select Twin Picture by pressing ADJ twice on R/C, check
component in the main picture and AV1 in the sub
picture.

4) Adjust the R-OFFSET, B-OFFSET color impression of
component(Main picture) and external Input(Sub
picture) same by pressing Volume +,- key.

DDC DATA INPUT FOR DIGITAL-RGB

1) Connect PC Serial to DVI Cable of JIG for DDC
adjustment to RGB2 terminal (DVI Jack).

2) Operate S/W for DDC record and select DDC Data for
Digital RGB in Model Menu.

3) Operate EDID Write command.

4) Operate EDID Read command and check whether
Check Sum is OK.

5) If Check Sum is NG, repeat 3 & 4.

6) If Check Sum is OK, DDC Data for Digital-RGB input
is completed.

PV154 - 923-03499 11 P50W26 - SERVICING

SERVICING

EXTERNAL CONTROL

OVERVIEW

Connect the RS-232C input jack to an external control
device (such as a computer or an A/V control system)
and control the set’s functions externally.

Connect the serial port of the control device to the RS­232C jack on the Monitor back panel. RS-232C
connection cables are not supplied with the set. The
set’s remote control and front panel controls (except main
power) will not be functional if the set is controlled by a
PC computer or other external device.

CONNECTION

Type of connector is a D-Sub 9-pin male (Use a null
modem/serial cable). Wire the 7-Wire cable so that each
pair of data lines cross between the two devices. These
data line pairs are RXD (Receive data) and TXD (Transmit
data), DTR (DTE side ready) and DSR (DCE side ready),
and RTS (Ready to send) and CTS (Clear to send).

When using the 3-Wire cable connected to RXD, TXD and
GND; Pin No. 4 (DTR) and Pin No. 6 (DSR) must be
connected to the monitor. (The cable must be
disconnected from the Monitor to be able to use the
remote control and Monitor front panel controls.)

1

control device.

RS-232C CONFIGURATIONS

7-WIRE CABLE CONFIGURATION

7-wire configuration

(Standard RS-232C cable)

PDP

3
2
5
6
4
8
7

DB 9

TXD

RXD
GND
DSR

DTR

CTS

RTS

RXD
TXD

GND

DTR
DSR
RTS
CTS

PC

2
3
5
4
6
7
8

DB 9

Control line

The Monitor is available to switch between external
adjustment and remote control adjustment using a
control line. If the control line is high, the monitor is
controlled by the external control device. If the control
line is low, the Monitor is controlled by the Monitor’s
remote control.

3-WIRE CABLE CONFIGURATION

5

Pin No.4 and Pin

No.6 must be
connected on

monitor side.

No. Pin name
1 No connection
2 RXD (Receive data)
3 TXD (Transmit data)
4 DTR (DTE side ready)
5 GND
6 DSR (DCE side ready)
7 RTS (Ready to send)
8 CTS (Clear to send)
9 No Connection

9

6

With the RS-232 input connected, the set cannot be
controlled by both an external control device and the
remote control at the same time. The set can only be
controlled by either the remote control or the external

3-wire configuration

(Not standard)

PDP

3
2
5
4
6
7
8

DB 9

TXD
RXD
GND
DTR
DSR
RTS
CTS

RXD
TXD

GND

DTR
DSR
RTS
CTS

PC

2
3
5
4
6
7
8

DB 9

When using a 3-Wire cable configuration there is no
control line. The external control device must put the
Monitor into the “change into remote control
adjustment mode”. The Monitor will then be able to
be controlled by the remote control. If the Monitor is
turned back on, it will revert back to external device
control.

SET ID

Set ID to specify a monitor identification number. Press
the menu button and then use the up/down button to
select the SPECIAL menu. Press the vol (G) button.

Use the up/down buttons to select SET ID and then press

PV154 - 923-03499 12 P50W26 - SERVICING

the volume up button. Use the volume button to adjust

Transmission

*

[Command] : To control PDP set.

*

[Set ID] : You can adjust the set ID to choose

desired monitor ID number in special
menu. See page 47. Adjustment range
is 1 ~ 99.
When selecting Set ID 0, every connected
PDP set is controlled.

*

[DATA] : To transmit command data.

Transmit FF data to read status of
command.

*

[Cr] : Carriage Return

ASCII code 0x0D

*

[ ] : ASCII code space (0x20)

[Command][ ][Set ID][ ][Data][Cr]

OK Acknowledgement

* The Monitor transmits ACK (acknowledgement) based

on this format when receiving normal data. At this
time, if the data is data read mode, it indicates present
status data. If the data is data write mode, it returns
the data of the PC computer.

[Set ID][:][OK][x][Data][x]

Error Acknowledgement

* The Monitor transmits ACK (acknowledgement) based

on this format when receiving abnormal data from
non-viable functions or communication errors.

[Set ID][:][NG][x]

Transmission / Receiving Protocol

SET ID to choose a desired monitor ID number. The
adjustment range for SET ID is 1- 99. Default monitor ID
is 1.

COMMUNICATION

COMMUNICATION PARAMETERS

• Baud rate: 2400 bps (UART)

• Data length: 8 bits

• Parity: None

• Stop bit: 1 bit

• Communication code: ASCII code

If the command interval is interrupted for more than
4 seconds, only Command 1 will be recognized. Be
careful when using the power command.

COMMAND REFERENCE LIST

NAME COMMAND DATA RANGE

01. Power p 0 - 1

02. Input Select i 0 - 3

03. Aspect Ratio r 0 - 2

04. Screen mute m 0 - 1

05. Volume mute w 0 - 1

06. Volume control v 0 - 64

07. Contrast k 0 - 64

08. Brightness b 0 - 64

09. Color c 0 - 64

10. Tint t 0 - 64

11. Sharpness s 0 - 64

12. OSD select d 0 - 1

13. Abnormal state a 0 - 1

14. PIP z 0 - 3

15. PIP input select e 0 - 1

16. PIP sound select u 0 - 1

17. PIP position x 0 - 3

18. remote control
adjustment mode

Note: Data values are written in hexidecimal. They must be

passed to the monitor in Hexidecimal form.

SERVICING

j0 - 1

PV154 - 923-03499 13 P50W26 - SERVICING

SERVICING

01. Power (Command:p)

 To control Power On/Off of the Monitor.

Transmission

[p][ ][Set ID][ ][Data][Cr]

Data 0 : Power Off

1 : Power On

* Example : Power on for set ID No.3.

Type : P 3 1 0x0D

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Power Off

1 : Power On

* In example : Monitor Acknowledges power on for set ID

No.3.

 To show Power On/Off.

Transmission

[p][ ][Set ID][ ][FF][Cr]

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Power Off

1 : Power On (RGB)
2 : Power On (Video)
3 : Power On (Component)
4 : Power On (S-Video)

* In like manner, if other functions transmit FF data

based on this format, Acknowledgement data feed
back presents status about each function.

02. Input select (Command:i)

03. Aspect Ratio (Command:r)

 To adjust the screen format.

You can also adjust the screen format using the ratio
(Aspect Ratio Control) button on remote control or in
the Special menu.

Transmission

[r][ ][Set ID][ ][Data][Cr]

Data 0 : Wide screen (16:9)

1 : Normal screen (4:3)
2 : Full screen (Zoom)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Wide screen (16:9)

1 : Normal screen (4:3)
2 : Full screen (Zoom)

* Using the PC input, you select either 16:9 or 4:3 screen

aspect ratio.

* Using the DTV 720p/1080i input, you can only select

16:9 screen aspect ratio.

04. Screen mute (Command:m)

 To select screen mute on/off.

Transmission

[m][ ][Set ID][ ][Data][Cr]

Data 0 : Screen mute on (Picture off)

1 : Screen mute off (Picture on)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Screen mute on (Picture off)

1 : Screen mute off (Picture on)

 To select input source for the Monitor.

You can also select an input source using the
video/pc button on the Monitor’s remote control.

Transmission

[i][ ][Set ID][ ][Data][Cr]

Data 0 : RGB

1 : AV (Video)
2 : Component
3 : S-AV (S-Video)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : RGB

1 : AV (Video)
2 : Component
3 : S-AV (S-Video)

PV154 - 923-03499 14 P50W26 - SERVICING

05. Volume mute (Command:w)

 To control volume mute on/off.

You can also adjust mute using the mute button on
remote control.

Transmission

[w][ ][Set ID][ ][Data][Cr]

Data 0 : Volume mute on (Volume off)

1 : Volume mute off (Volume on)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Volume mute on (Volume off)

1 : Volume mute off (Volume on)

SERVICING

06. Volume control (Command:v)

 To adjust volume.

You can also adjust volume with the volume buttons
on remote control.

Transmission

[v][ ][Set ID][ ][Data][Cr]

Data Min : 0 ~ Max : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Min : 0 ~ Max : 64

Refer to Real data mapping as shown below.

*

07. Contrast (Command:k)

 To adjust screen contrast.

You can also adjust contrast in the Picture menu.

Transmission

[k][ ][Set ID][ ][Data][Cr]

Data Min : 0 ~ Max : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Min : 0 ~ Max : 64

Refer to Real data mapping as shown below.

*

08. Brightness (Command:b)

 To adjust screen brightness.

You can also adjust brightness in the Picture menu.

Transmission

[b][ ][Set ID][ ][Data][Cr]

09. Color (Command:c)

 To adjust the screen color.

You can also adjust color in the Picture menu.

Transmission

[c][ ][Set ID][ ][Data][Cr]

Data Min : 0 ~ Max : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Min : 0 ~ Max : 64

Refer to Real data mapping as shown below.

*

10. Tint (Command:t)

 To adjust the screen tint.

You can also adjust tint in the Picture menu

Transmission

[t][ ][Set ID][ ][Data][Cr]

Data Red : 0 ~ Green : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Red : 0 ~ Green : 64

Refer to Real data mapping as shown below.

*

11. Sharpness (Command:s)

 To adjust the screen sharpness.

You can also adjust sharpness in the Picture menu

Transmission

[s][ ][Set ID][ ][Data][Cr]

Data Min : 0 ~ Max : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Min : 0 ~ Max : 64

Refer to Real data mapping as shown below.

*

Data Min : 0 ~ Max : 64

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data Min : 0 ~ Max : 64

PV154 - 923-03499 15 P50W26 - SERVICING

Refer to Real data mapping as shown below.

*

SERVICING

12. OSD select (Command:d)

 To select OSD (On Screen Display) on/off.

Transmission

[d][ ][Set ID][ ][Data][Cr]

Data 0 : OSD off

1 : OSD on

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : OSD off

1 : OSD on

* The remote control and Monitor front panel controls

(except main power) are not operable when the M onitor
is set up to be controlled by the PC computer.

13. Abnormal state (Command:a)

 To recognize an a bnormal state.

Transmission

[a][ ][Set ID][ ][FF][Cr]

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : OK

1 : Fan alarm
2 : 5V down
3 : AC down

This function is read only.

*

14. PIP (Command:z)

 To control PIP (Picture-in-Picture). You can also control

PIP using the pip button on re mote control or in the
Special menu.

Transmission

[z][ ][Set ID][ ][Data][Cr]

Data 0 : PIP off

1 : PIP (small)
2 : PIP (large)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : PIP off

1 : PIP (small)
2 : PIP (large)

PIP only works in the following re solutions:

*

RGB PC 640x480 (VGA) / 800x600(SVGA) / 1024x768
(XGA) (only in vertical frequency 60Hz),
Component 480p / 720p / 1080i.

15. PIP input select (Command:e)

To select input source for sub picture in P IP mode.

You can also se lect source using input select button
on the remote control or in the Special menu.

Transmission

[e][ ][Set ID][ ][Data][Cr]

Data 0 : AV (VIDEO)

1 : COMPONENT
2 : S-AV (S-VIDEO)

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : AV (VIDEO)

1 : COMPONENT
2 : S-AV (S-VIDEO)

COMPONENT source only works with 480i input signal.

*

PV154 - 923-03499 16 P50W26 - SERVICING

SERVICING

16. PIP sound select (Command:u)

To select main or sub (inse t) sound for PIP.

You can also se lect sound select in PI P on the
special me nu.

Transmission

[u][ ][Set ID][ ][Data][Cr]

Data 0 : Main picture sound

1 : Sub picture sound

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Main picture sound

1 : Sub picture sound

COMPONENT source only works in 480i input signal.

*

17. PIP position (Command:x)

 To select sub picture position for PI P.

You can also a djust the sub picture position using the
position button on the remote control or in PIP on the
Special menu.

18. Change into Remote control
adjustment mode (Command:j)

 To control the M onitor with the remote control while

the cable is still connected.

Transmission

[j][ ][Set ID][ ][Data][Cr]

Data 1 : Remote control adjustment mode

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : PC adjustment mode

1 : Remote control adjustment mode

* If external equipment commands the Monitor to

"change into remote control adjustment mode", the
Monitor can only be adjusted by the remote control.
To revert the Monitor control to external control de vice
adjustment, turn the Monitor off and then on again.

Transmission

[x][ ][Set ID][ ][Data][Cr]

Data 0 : Right down on scree n

1 : Left down on screen
2 : Left up on screen
3 : Right up on screen

Acknowledgement

[Set ID][:][OK][x][Data][x]

Data 0 : Right down on screen

1 : Left down on screen
2 : Left up on screen
3 : Right up on screen

PV154 - 923-03499 17 P50W26 - SERVICING

NO VIDEO 1

SERVICING

No video

Check Input of AC

(90~225V)

Normal

Check ST-BY LED ON

Main S/W ON

Normal

Check LED YELLOW

Sub S/W ON

Normal

Check conditions of and

various connectors

Abnormal

Abnormal

Abnormal

Connect plug with the set

Check AC Line Fuse

Check voltage of Vs after

disconnecting with CN802,

CN803, CN804. Check short

of Q603, Q703.

If found in good condition

go to Video 2.

Abnormal

Replace Q603, Q703

NO SOUND

Check a connective

condition of sound power

cable

Check voltage of sound

terminal

Check connection with

F8811 Fuse

Check connection

line of speaker

PV154 - 923-03499 18 P50W26 - SERVICING

TROUBLESHOOTING

NO VIDEO 2

Abnormal Picture

SERVICING

Input PC signal

Normal

Check CXA2101

IC203

Normal

Check ADV7123

IC406

Normal

Check FLI2220

IC404

Normal

Check FLI2200

IC403

Normal

Abnormal

Check

IC501

Check 74F541D

IC902~IC905

Check cable of pin 41

P902

Check VPC3230

IC201

Normal

Check Input jack & Connector

NO SOUND

Check connector

speaker to set

PV154 - 923-03499 19 P50W26 - SERVICING

Check MSP3401

IC601

Check LA4282

IC603

Check Input

Jack

All 50” models are module level repair only. Parts contact
information is below.

Voice: 1-888-3-ZENITH

Fax: 1-888-6-ZENITH

Mail: Zenith National Parts

201 James Record Road

Huntsville, AL 35824-1513

PARTS

P50W26

Loc. Part No Description

200 6348Q-C030C PDP 50" 16:9 1365*768 DU
201 6871QCH019A PCB ASSY,DI CTRL
202 6871QDH030A PCB ASSY,DI YDRV
203 6871QDH031A PCB ASSY,DI YDRV
204 6871QLH018A PCB ASSY,DI XRLT
205 6871QLH019A PCB ASSY,DI XRLT
206 6871QPH006A PCB ASSY,MA DCDC ASSY
207 6871QRH016A PCB ASSY,DI XRRT ASSY
208 6871QRH017A PCB ASSY,DI XRRT ASSY
209 6871QXH011A PCB ASSY,DI XRCT ASSY
210 6871QXH012A PCB ASSY,DI XRCT ASSY
211 6871QYH020A PCB ASSY,DI YSUS ASSY
212 6871QZH021A PCB ASSY,DI ZSUS ASSY
213 4980V00416A SUP ASSY RIG
214 4980V00416B SUP ASSY LEF
215 4980V00498A SUP ASSY, SMPS
300 3091V00433F CABINET STEREO RF
301 4980V00361A SUPPORTER FILTER TOP
302 4980V00362A SUPPORTER FILTER BOTTOM
303 4980V00363A SUPPORTER FILTER SIDE
305 3790V00311C WINDOW GLASS FILTER
310 5020V00688B BUTTON CONTROL
320 320-062H SPRING COIL
330 5020V00645B POWER BUTTON
400 3809V00292A BACK COVER ASSY INNER
401 3301V00009D PLATE ASSY AV
410 3809V00293C BACK COVER ASSY
520 6871VMMC08A PCB MAIN RF-02CA
530 6871VSMD10A PCB EXTRA RF-02CA 50IN
540 6871VSMD04A PCB INTER RF-02CA I/F NT
550 6871VSMD06A PCB A/V RF-02CA 50IN AUD
560 6871VSMD11A PCB SPK RF-02CA 50IN RIG
561 4980V00384A SUP INTERFACE MN-50
570 3141VSNA57A CHASSIS SUB RF-02CA
580 6871VSMD08A PCB KBD RF-02CA 50IN
581 5020V00647A BUTTON CONTROL INNER
590 6871VSMD09A PCB PSW RF-02CA 50IN
591 5020V00648A POWER BUTTON INNER MN-50PZ4
600 6871VSMN17A PCB EXTRA RF02CA
610 3501V00085A BOARD ASSY P-BOARD

P50W26B

Loc. Part No. Description

200 6348Q-C030C PDP 50" 16:9 1365*768 DU
201 6871QCH019A PCB ASSY,DI CTRL
202 6871QDH030A PCB ASSY,DI YDRV
203 6871QDH031A PCB ASSY,DI YDRV
204 6871QLH018A PCB ASSY,DI XRLT
205 6871QLH019A PCB ASSY,DI XRLT
206 6871QPH006A PCB ASSY,MA DCDC ASSY
207 6871QRH016A PCB ASSY,DI XRRT ASSY
208 6871QRH017A PCB ASSY,DI XRRT ASSY
209 6871QXH011A PCB ASSY,DI XRCT ASSY
210 6871QXH012A PCB ASSY,DI XRCT ASSY
211 6871QYH020A PCB ASSY,DI YSUS ASSY
212 6871QZH021A PCB ASSY,DI ZSUS ASSY
213 4980V00416A SUP ASSY RIG
214 4980V00416B SUP ASSY LEF
215 4980V00498A SUP ASSY, SMPS
300 3091V00433E CABINET STEREO RF
301 4980V00361A SUPPORTER FILTER TOP
302 4980V00362A SUPPORTER FILTER BOTTOM
303 4980V00363A SUPPORTER FILTER SIDE
305 3790V00311C WINDOW GLASS FILTER
310 5020V00688A BUTTON CONTROL
320 320-062H SPRING COIL
330 5020V00645A POWER BUTTON
400 3809V00292A BACK COVER ASSY INNER
401 3301V00009D PLATE ASSY AV
410 3809V00293B BACK COVER ASSY
520 6871VMMC08A PCB MAIN RF-02CA
530 6871VSMD10A PCB EXTRA RF-02CA 50IN
540 6871VSMD04A PCB INTER RF-02CA I/F NT
550 6871VSMD06A PCB A/V RF-02CA 50IN AUD
560 6871VSMD11A PCB SPK RF-02CA 50IN RIG
561 4980V00384A SUP INTERFACE MN-50
570 3141VSNA57A CHASSIS SUB RF-02CA
580 6871VSMD08A PCB KBD RF-02CA 50IN
581 5020V00647A BUTTON CONTROL INNER
590 6871VSMD09A PCB PSW RF-02CA 50IN
591 5020V00648A POWER BUTTON INNER MN-50PZ4
600 6871VSMN17A PCB EXTRA RF02CA
610 3501V00085A BOARD ASSY P-BOARD

PV154 - 923-03499 20 P50W26 - MODEL PARTS

Diagrams

301

303

200

204

213

302

300

305

214

215

610

520

560

530

401

570 400

410

310

320

330

581

580

550

540

590

591

212

209

207

202

201

205

210

208

203

211

206

Loc. Part No. Description

200 6348Q-C030C PDP 50" 16:9 1365*768 DU
201 6871QCH019A PCB ASSY,DI CTRL
202 6871QDH030A PCB ASSY,DI YDRV
203 6871QDH031A PCB ASSY,DI YDRV
204 6871QLH018A PCB ASSY,DI XRLT
205 6871QLH019A PCB ASSY,DI XRLT
20 6 6871QPH006A PCB A SSY ,MA DCDC A SS Y
207 6871QRH016A PCB ASSY,DI XRRT ASSY
208 6871QRH017A PCB ASSY,DI XRRT ASSY
209 6871QXH011A PCB ASSY ,DI XRCT ASSY
210 6871QXH012A PCB ASSY ,DI XRCT ASSY
211 6871QYH020A PCB ASSY,DI YSUS ASSY
212 6871QZH021A PCB ASSY,DI ZSUS ASSY
213 4980V00416A SUP ASSY RIG
214 4980V00416B SUP ASSY LEF
215 4980V00498A SUP ASSY, SMPS
300 3091V00433F CABINET STEREO RF
301 4980V00361A SUPPORTER FILTER TOP
302 4980V00362A SUPPORTER FILTER BOTTOM
303 4980V00363A SUPPORTER FILTER SIDE
305 3790V00311C WINDOW GLASS FILTER
310 5020V00688B BUTTON CONTROL
320 320- 062H SPRING COIL
330 5020V00645B POWER BUTTON
400 3809V00292A BACK COVER ASSY INNER
401 3301V00009D PLATE ASSY AV
410 3809V00293C BACK COVER ASSY
520 6871VMMC08A PCB MA IN RF-02CA
530 6871VSMD10A PCB EXTRA RF-02CA 50IN
540 6871VSMD04A PCB INTER RF-02CA I/F NT
550 6871VSMD06A PCB A/V RF-02CA 50IN AUD
560 6871VSMD11A PCB SPK RF-02CA 50IN RIG
561 4980V00384A SUP INTERFACE MN-50
570 3141VSNA57A CHASSIS SUB RF-02CA
580 6871VSMD08A PCB KBD RF-02CA 50IN
581 5020V00647A BUTTON CONTROL INNER
590 6871VSMD09A PCB PSW RF-02CA 50IN
591 5020V00648A POWER BUTTON INNER MN-50PZ4
600 6871VSMN17A PCB EXTRA RF02CA
610 3501V00085A BOARD ASSY P-BOARD

P50W26

Loc. Part No. Description

200 6348Q-C030C PDP 50" 16:9 1365*768 DU
201 6871QCH019A PCB ASSY,DI CTRL
202 6871QDH030A PCB ASSY,DI YDRV
203 6871QDH031A PCB ASSY,DI YDRV
204 6871QLH018A PCB ASSY,DI XRLT
205 6871QLH019A PCB ASSY,DI XRLT
20 6 6871 QPH00 6A PCB A SSY , MA DCDC ASSY
207 6871QRH016A PCB ASSY,DI XRRT ASSY
208 6871QRH017A PCB ASSY,DI XRRT ASSY
209 6871QXH011A PCB ASSY,DI XRCT ASSY
210 6871QXH012A PCB ASSY,DI XRCT ASSY
211 6871QYH020A PCB ASSY,DI YSUS ASSY
212 6871QZH021A PCB ASSY,DI ZSUS ASSY
213 4980V00416A SUP A SSY RIG
214 4980V00416B SUP ASSY LEF
215 4980V00498A SUP A SSY, SMPS
300 3091V00433E CABINET STEREO RF
301 4980V00361A SUPPORTER FILTER TOP
302 4980V00362A SUPPORTER FILTER BOTTOM
303 4980V00363A SUPPORTER FILTER SIDE
305 3790V00311C WINDOW GLA SS FILTER
31 0 5020 V 00 688A BUTTON CONTROL
320 320-062H SPRING COIL
330 5020V00645A POWER BUTTON
40 0 3809 V 00 292A BA CK COVER ASSY INNER
401 3301V00009D PLA TE ASSY AV
410 3809V00293B BACK COVER A SSY
520 6871VMMC08A PCB MAIN RF-02CA
530 6871VSMD10A PCB EXTRA RF-02CA 50IN
540 6871VSMD04A PCB INTER RF-02CA I/F NT
550 6871VSMD06A PCB A/V RF-02CA 50IN AUD
560 6871VSMD11A PCB SPK RF-02CA 50IN RIG
561 4980V00384A SUP INTERFACE MN-50
570 3141VSNA57A CHASSIS SUB RF-02CA
580 6871VSMD08A PCB KBD RF-02CA 50IN
58 1 5020 V 00 647A BUTTON CONTROL INNER
590 6871VSMD09A PCB PSW RF-02CA 50IN
591 5020V00648A POWER BUTTON INNER MN-50PZ4
600 6871VSMN17A PCB EXTRA RF02CA
610 3501V00085A BOARD ASSY P-BOA RD

P50W26B

P50W26 Exploded View

PV154 - 923-03499

27

P50W26 - DIAGRAMS

P101

VA

N/C

GND

+15V

GND

+5V

P210

P2

P202

P201

P211

To Plasma

To Plasma

P212

To Plasma

P213

To Plasma

P10

P3

P7

P6

P8

P5

P4

P9

P1

P11

To Plasma

To Plasma

To Plasma

To Plasma

Z - DRIVE

Z - CON BOTTOM

Z - CON TOP

P004B

Control Buttons

P2

P4

P6

P1

P11

P13

To Plasma

+5V

GND

-15V

GND

GND

GND

NC

Vs

Vs

Y - DRIVE LOWER

Y - DRIVE UPPER

CONTROL PCB ASSY

Y - SUS DRIVE AMP

P101

P300

P801

P802

P1720

MICRO/X-Y GENERATOR

PCB ASSY,MAIN

FAN GND
FAN GVCC
GND
GND
12V
12V
GND
GND
GND
5V
5V
5V

GND

5VA

5VA

5VA
5VA

GND

GND

GND

24V

N/C

GND

GND

24V

N/C
5V-MNT
VAVS-ON
GND
STBY
RL-ON
AC-DET

P5

NC

NC

NC

NC

GND

NC

VE

P2

CN810

CN809

CN808

CN3

CN804

CN801

CN803

CN806

P3

VSetup

NC

GND

GND

-Vy

P902

P100

P601A

P1

P806B

P007B

P112P111

To Plasma

To Plasma

P110

To Plasma

5V
5V
5V
GND
GND
GND
12V
12V
GND
GND
NC
NC

+5V

GND

+15V

GND

NC

VA

NC
NC
NC
NC
GND
NC
Vse

5V cnt
GND
15V
GND
GND
NC
175V
175V

-75V

GND

GND

NC

260V

65V
NC
GND
15V
GND
5V cnt

30V
30V
GND
GND

5V cnt
5V cnt
5V cnt
5V cnt
GND
GND
GND
GND

175V

175V

NC

GND

GND

GND

15V

GND

5V

To Plasma

To Plasma

To Plasma

To Plasma

To Plasma

To Plasma

To Plasma

VOL +

GND

GND

GND

5V

TX

GND

POWER

G LED

R LED

VOL -

SEL

REMOTE
GND
5V ST
GND
LED RED
LED GRN
SW1
SW2
SW3
SW4

AC/ON
RL ON
STBY
5V
GND
VS ON
5V­MONI
NC

5V
GND
15V
GND
GND
NC
Vs
Vs

P102

CN802

P102

A/C IN

P3

65V
NC
GND
15V
GND
5V cnt

CN811

N-SCL
N-SDA
S-SCL
S-SDA
FS
GND

NOT USED

AC/DC CONVERTOR

EMI FILTER

PCB ASSY POWER

X-DRIVE RIGHT

AV PACK

6871VSMA90B

X-DRIVE LOWER

SPEAKER JACK

P1

P2

P3

P4

P5

P6

P7

P8

P1

P6

P5

P4

P102

CN805

CN807

5Vcnt
GND
15V
GND
NC
65V

5Vcnt
GND
15V
GND
NC
65V

NOTE: Some plug locations on the PWB vary depending on model.

P50W26 Interconnect Diagram

28

P50W26 - DIAGRAMSPV154 - 923-03499

P50W26 Block Diagram

PV154 - 923-03499

29

P50W26 - DIAGRAMS

MA I N( T OP )

P50W26 Main PCB

30

P50W26 - DIAGRAMSPV154 - 923-03499

PRE-AMP(TOP)

PRE-AMP(BOTTOM)

LOCA L K EY(TOP)

LOCA L K EY(BOTTOM)

POWER S/W(TOP)

POWER S/W(BOTTOM)

RIGHT SPK(TOP)

RIGHT SPK(BOTTOM)

AUDIO(TOP)

AUDIO(BOTTOM)

P50W26 Other PCBs

PV154 - 923-03499

31

P50W26 - DIAGRAMS

P50W26 Other PCBs

32

P50W26 - DIAGRAMSPV154 - 923-03499

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

33 P50W26 SHEET 33PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

34PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

P50W26 SHEET 34

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

35 P50W26 SHEET 35PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

36PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

P50W26 SHEET 36

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

37 P50W26 SHEET 37PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

38PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

P50W26 SHEET 38

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

39 P50W26 SHEET 39PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

40PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

P50W26 SHEET 40

Circuit

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

41 P50W26 SHEET 41PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

12345678910

G

F

E

D

C

B

A

CRITICAL SAFETY COMPONENTS ARE IDENTIFIED BY THE LETTER “X“ IN THEIR
COMPONENT DESIGNATORS. REPLACE ONLY WITH PART NUMBERS SPECIFIED.

42PV154 - 923-03499

ALL SYMBOLS WITH “M” ON END OF DESIGNATOR
INDICATE SURFACE MOUNTED COMPONENT

P50W26 SHEET 42