Panasonic PT52LCX66 - MULTI MEDIA DISPLAY, PT-56LCX66, PT-61LCX66, PT-52LCX16, PT-56LCX16 Service Manual

ORDER NO. MKE0605850CE

Multi Media Display

PT-52LCX66
PT-56LCX66
PT-61LCX66
PT-52LCX16
PT-56LCX16

B2

© 2006 Panasonic Shikoku Electronics Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

CONTENTS

Page Page

1 Safety Precautions 3

1.1. General Guidelines

1.2. Leakage Current Cold Check

1.3. Leakage Current Hot Check

1.4. UV-Precaution

2 Warning

2.1. Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices

3 Service Navigation

3.1. Introduction

3.2. About Lead Free Solder (PbF)

4 Specifications
5 Location of Controls and Components

5.1. Operation Instructions

5.2. Replacement of Lamp

6 Service Mode
7 Troubleshooting Guide

7.1. Troubleshooting Hints for Block Level Repair

8 Disassembly and Assembly Instructions

8.1. Cabinet Section

9 Measurements and Adjustments

9.1. Adjustment Procedures 1

10 Maintenance

10.1. Cleaning Methods

11 Block Diagrams
12 Schematic Diagrams

10

11
21

21

32

32

47

47

50

50

51
61

3
3
3
3

4

4

5

5
5

6
7

7

12.1. SCHEMATIC DIAGRAM AND CIRCUIT BOARD LAYOUT
NOTES

12.2. INTERCONNECTION SCHEMATIC DIAGRAM

12.3. FRONT JACK / OPERATION SCHEMATIC DIAGRAM

12.4. POWER SWITCH / THERMISTOR 2 / COVER SWITCH
SCHEMATIC DIAGRAMS

12.5. VOLTAGE CHART

13 Printed Circuit Board

13.1. FRONT JACK / OPERATION P.C.B. / POWER SWITCH
P.C.B. / THERMISTOR 2 P.C.B. / COVER SWITCH
P.C.B.

14 Ex ploded Views

14.1. MAIN PARTS SECTION

14.2. BASE BODY SECTION

14.3. DISPLAY SECTION

14.4. SCREEN SECTION

14.5. PROJECTION SECTION

14.6. TV UNIT SECTION

14.7. PACKING PARTS AND ACCESSORIES SECTION

15 Replacement Parts List

15.1. REPLACEMENT NOTES

15.2. MECHANICAL REPLACEMENT PARTS LIST

15.3. OPTIONAL ACCESSORY REPLACEMENT PARTS LIST

15.4. ELECTRICAL REPLACEMENT PARTS LIST

61
62
63

64
65

67

67

69

69
71
72
74
76
77
78

79

79
80

81
81

2

1 Safety Precautions

1.1. General Guidelines

1. For continued safety, no modification of any circuit should
be attempted.

2. Disconnect AC Plug before disassembling this unit.

3. It is advisable to use an isolation transformer in the AC
supply before servicing.

4. When servicing, observe the original lead dress. If a short
circuit is found, replace all 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, shield, and
isolation R-C combinations etc. are properly installed.

6. After servicing, be sure to restore the wires, leads,
insulation barriers, shields, etc.

7. After servicing, make the leakage current checks to prevent
the customer from being exposed to shock hazards.

Caution:

Use a separate Isolation Transformer for this unit when
servicing.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

Figure 1

1.4. UV-Precaution

1. Be sure to disconnect the AC Plug when replacing the
lamp.

2. Since the lamp reaches a very high temperature during its
operation, wait until it has completely cooled off when
replacing the Lamp Unit.

3. The lamp emits small amounts of UV-Radiation.
Avoid direct-eye contact by covering the Lamp and wearing

the UV protective glasses.

4. The high pressure lamp involves a risk of explosion.

1.2. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two
prongs on the plug.

2. For physically operated power switches, turn power on.
Otherwise skip step 2.

3. Measure the resistance value, with an ohmmeter, between
the jumpered AC plug and each exposed metallic cabinet
part on the receiver, such as screwheads, connectors, etc.
When the exposed metallic part has a return path to the
chassis, the reading should be between 1 MΩ and 12 MΩ.
When the exposed metal does not have a return path to the
chassis, the reading must be infinity.

1.3. Leakage Current Hot Check

1. Plug the AC cord directly into the AC outlet.
Do not use an isolation transformer for this check.

2. Connect "A" to exposed metallic part on the set. And
connect "B" to a good earth ground, as shown in Figure 1.

3. Use an AC voltmeter, with 1 kΩ/V or more sensitivity, to
measure the potential across the resistor.

4. Check each exposed metallic part, and measure the
voltage at each point.

5. Reverse the AC plug in theAC outlet and repeat each of the
above measurements.

6. The potential at any point should not exceed 0.25 V RMS.
A leakage current tester (Simpson Model 228 equivalent)

may be used to make the hot checks. Leakage current must
not exceed 1/2 mA. In case a measurement is outside of
the limits specified, there is a possibility of shock hazard,
and the receiver should be repaired and rechecked before
it is returned to the customer.

Figure 2

3

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

2 Warning

2.1. Prevention of Electro Static 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 component damage
caused by electro static 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

aluminum 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 antistatic solder removal device. Some solder removal devices not classified as "antistatic (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 harmless 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).

4

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

3 Service Navigation

3.1. Introduction

This service manual contains technical information which will allow service personnel´s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.

If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with original service
manual.

3.2. About Lead Free Solder (PbF)

5

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

4 Specifications

6

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

5 Location of Controls and Components

5.1. Operation Instructions

7

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

8

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

9

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

5.2. Replacement of Lamp

10

6 Service Mode

LED INDICATIONS FOR ERROR CONDITIONS

Each LED indication facilitates finding the cause of an error.
When an error is detected, the Lamp goes off and the LEDs on the front flash.

LAMP LED

TEMP LED

POWER LED

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

(Note 1, 2) (Note 3)(Note 4)

Error No.

1)

2)

3)

4)

5)

6)

7)

8)

9)

10)

11)

12)

Note:

1. The detected SOS Error 1) 2) 3) 4) 11) 12) data will be stored in the EEPROM.

2.SOS (Error) information is displayed in Service Mode (4/4).

3.LAMP OFF: The LED will flash immediately after the Lamp goes off.

4.In case of Error 9) or 10), the unit will not shut off and Dynamic Iris setting in Adv. adjust of Picture Menu will be

changed to "OFF" automatically. When the unit is turned off and turned back on, Dynamic Iris "OFF" setting remains.
Lamp LED will not flash as long as Dynamic Iris setting in Adv. adjust of Picture Menu is set to "ON" manually.

Error Information

SOS2 (Over voltage/current)

Fan 1, Fan 2 or Fan 3 stops

Abnormal voltage (DT+5V line)
IC5001 (GC4Pro) communication

error
Temperature Sensor shorted or open

(Thermistor 2 P.C.B.)
Abnormal temperature

(Thermistor 2 P.C.B.)
Clogged Air Filter

Abnormal Lamp

Iris Mechanism hardware error

Iris calibration error

Lamp Cover open
Abnormal voltage (+17V, +9V, +5V line)

for LCD Drive P.C.B.

POWER LED

flashes orange

1
2

3
5

-

-

-

-

-

-

7
8

TEMP LED

flashes red

- -

-

-

-

2
3

6

-

-

-

-

-

LAMP LED

flashes red

-

-

-

-

--

-

SOS

H10SOS2

H20FANST

H30DT9V

H50GC4PR

1
2
3

-

-

(H70LAMCV)

(H80LCDDV)

-

-

-

-

-

LAMP OFF

RESET

Power
ON/OFF

AC
ON/OFF

Power
ON/OFF

AC
ON/OFF

Power
ON/OFF

Clean
Air Filter

-

Power

-

ON/OFF

11

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

MAIN PARTS LOCATION

<Front View>

TEMP LED

POWER LED

Front Cover Unit

TEMP LED

LAMP LED

Power Switch P.C.B.

Lamp Cover

Optical Cover

<Rear View>

LAMP LED

Cover Switch P.C.B.

Fan Case Unit
(Fan 1)

Projection Unit & Top Duct 3

Thermistor 2 P.C.B.

Air Filter

Thermal Fuse

Fan 3

SD Card P.C.B.

Front Jack
/Operation P.C.B.

Base P.C.B.

TV Unit & Digital Tuner P.C.B.

Digital T uner P.C.B.

Main P.C.B.

Air Filter

Air Filter

Iris P.C.B.

Note: There is not the Thermistor 1 P.C.B. in this unit.

Rear Cover

12

Fan 2

LCD Drive P.C.B.

Iris Unit

Power P.C.B.

Hall-S P.C.B.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

TO DISTINGUISH THE PROJECTION UNIT

The only difference between the 52/56 inch model and 61 inch
model of the Projection Unit is the LCD Drive P.C.B.
Therefore, see the stamp on the Lamp Wall to differentiate.
Also, the Focus Adjustment should be performed to match
each size of model after replacing the new Projection Unit or
the new Base Body Unit.

Note:

The Base Body Unit includes the Projection Unit.

Stamp

LSXA0771
LSXA0827

: for 52/56 inch models
: for 61 inch model

TO READ THE DIGITAL TUNER (PEAKS)
SOFTWARE VERSION AND TV
MICROCONTROLLER SOFTWARE
VERSION

1. Press MENU key with the power on.

2. Press CH UP/DOWN key and select "Setup."
Then press OK key.

3. Press CH UP/DOWN key and select "About."
Then press OK key.

4. Select "Version" and press OK key.
Version menu will appear as shown below.
Starting with the second digit from the right or from the left.

0120-4310

0120-4310

Read every

Read every
other number
from the right:

other number
from the left:

BEFORE REMOVING THE PROJECTION
UNIT FROM THE UNIT AT THE USER’S
LOCATION

When removing the Projection Unit, remove the Lamp Unit and
the Top Duct 3 Unit from the Projection Unit and keep them.
Then, reinstall this Lamp Unit and the Top Duct 3 Unit into the
new Projection Unit.

Top Duct 3 Unit

421

Knob

421

Lamp
Unit

TV Microcontroller software Ver. : 1.030

Digital Tuner (Peaks) software Ver. : 1.420

LVDS
Cable

21

Projection Unit

13

MODEL

PT-52LCX66
PT-56LCX66
PT-61LCX66
PT-52LCX16
PT-56LCX16
NOT USED

MARK

A
B
C
D
E

PT

Note:

Refer to Item 3 of Schematic Diagram Notes of
Schematic Diagram and Circuit Board Layout Notes,
for mark "PT."

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

RESET USER’S MEMORY FUNCTIONS

Be sure to reset the user’s memory:

- After replacing the Digital Tuner P.C.B.

- If the secret code for V-chip has been forgotten.

- When moving the unit to a new location.

- When resetting SOS (Error) number records.

1. Turn on the power.

2. Press and hold the VOLUME DOWN button on the unit and
the OK key on the remote for more than 3 seconds. When
reset is finished, power shuts off automatically (the user’s
memory is reset).

CLOGGED AIR FILTER DETECTION

When a dirty or clogged air filter is detected, the OSD display
appears for 1 minute. And then the Lamp is turned OFF.
When this OSD display appears, remove the Projection Unit
from rear, and clean the air filters gently on the Projection Unit.

AIR FILTER CLEANING
IS RECOMMANDED AT THIS
TIME. FIRST TURN THE
UNIT OFF.
PLEASE CALL FOR
SERVICE.

UNIT WILL BE TURNED
OFF AFTER 1 MINUTE.

DO NOT UNPLUG AC CORD DURING
COOLING OPERATION

The lamp cooling fan will continue to operate for approximately
1 minute after the power is turned off.
At the same time, the POWER LED will flash red.
Do not disconnect the AC Cord from the power outlet and do
not open any circuit breakers while the cooling fan is still
operating.

HOT CIRCUIT

Primary circuit exists on the Power P.C.B.
This circuit is identified as "HOT" on the P.C.B. and in the
Service Manual. Use extreme care to prevent accidental shock
when servicing.

MODEL NO. IDENTIFICATION MARK

Use Marks shown in the chart below to distinguish the different
models included in this Service Manual.

14

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

BEFORE REMOVING THE MAIN P.C.B. OR
THE TV UNIT FROM THE UNIT AT THE
USE’S LOCATION

Note:

The TV Unit includes the Main P.C.B.

CAUTION:

Be sure to make a note of the CURRENT LAMP value

1.

(value A) in Service Mode (1/4):

SERVICE Mode 1/4

LAMP OPERATION TIME

CURRENT LAMP: 2000h
OSD DISP : ON
LON COUNT : 153
BKSV: 4B 7E 3D CA FB

<Service Mode (1/4)>

Fig. 2

LAMP OPERATION TIME is stored in EEPROM on the
Main P.C.B. Therefore, before removing the Main P.C.B. or
the TV Unit at the user’s location, make a note of the
CURRENT LAMP value (value A) in Service Mode (1/4).
Then, after installing the new Main P.C.B. or the TV Unit at
the user’s location, set the CURRENT LAMP value to the
original value (value A) in Service Mode.
Otherwise, OSD and LED Lamp replacement indications
will be displayed at the wrong time.

Note:
In case it is impossible to make a note of the CURRENT
LAMP value because of a defective Main P.C.B., ask the

customer their daily average use and the approximate age
of the current Lamp. Then, calculate the CURRENT LAMP
value as follows and make a note.

Value A

(Changeable)

WHEN REINSTALLING THE MAIN P.C.B.
OR THE TV UNIT FROM THE UNIT AT THE
USE’S LOCATION

CAUTION:

1. Set CURRENT LAMP value to original value as follows.

1) Select CURRENT LAMP in Service Mode (1/4).

2) Press the VOLUME UP/DOWN key on the remote to
change to the original value (value A) that was noted
before removing the Main P.C.B. or the TV Unit at the
user’s location.

SERVICE Mode 1/4

LAMP OPERATION TIME

CURRENT LAMP: 2000h
OSD DISP : ON
LON COUNT : 153
BKSV: 48 BF 9D 72 B5

<Service Mode (1/4)>

Fig. 3

Service Mode Map

Enter:

VOLUME DOWN button + TV/VIDEO key

(on the front) (on the remote)

(for more than 5 seconds in power off condition)

Power ON

SERVICE Mode 1/4

LAMP OPERATION TIME

CURRENT LAMP: 2000h
OSD DISP : ON
LON COUNT : 153
BKSV: B0 3A 59 CD 66

CH DOWN key CH UP key

< Service Mode (1/4) >

Value A

(Changeable)

BKSV number

Daily average use

(hours) (days) (hours)

Approx. age CURRENT LAMP

X=

Note:

The TOTAL value can be set to the original value in Service
Mode (2/4) by similar method:
Before removing the Main P.C.B. at the user’s location,
make a note of the TOTAL value in Service Mode (2/4).
Then, after installing the new Main P.C.B. at the user’s
location, set the TOTAL value to the original value in
Service Mode.

15

SERVICE Mode 2/4
IR:1 UNIT:1
IC2301:1 3101:1 4002:1
4504:1 5000:1 5001:1
5801:1 6000:1 9502:1

TOTAL : 12345h

TU8200:1
E:06030301
IC6001 V:0005024

CH DOWN key

< Service Mode (2/4) >

CH UP key

SERVICE Mode 3/4
IC6001 PORT
P0:10101010 P8:---10110
P1:-1111100 P9:--111111
P2:00000000 PA:00000000
P3:00000000 PB:11111110
P4:--111110 PC:11111100
P5:10110101 PD:-----111
P6:01011001 PE:11000000
P7:10101001 PF:----0011

< Service Mode (3/4) >

CH DOWN key CH UP key

SERVICE Mode 4/4

-SOS-
LAST SOS H10SAFE 01
SAFE 10.40.50.50.40
H10SOS2 :01 H20FANST:00

H30DT5V

H50GC4PR:01

:00 H40ACLST:00

< Service Mode (4/4) >

CH DOWN key

Exit:

Power OFF.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

WIRE AND LEAD POSITION DIAGRAM OF THE UNIT

After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best
operation of the unit.
Note: Use extreme care especially for the following.

TV Unit with Digital Tuner P.C.B.

AC Cord

Projection Unit

Base Body Unit

Fig. 9-1

16

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best
operation of the unit.
Note: Use extreme care especially for the following.

CN6001

CN5700
(From LCD
Drive P.C.B.)

CN6008
(From LCD
Drive P.C.B.)

(From Power
Switch P.C.B.)

CN6000
(From Power
P.C.B.)

CN6002
(From Power
P.C.B.)

Speaker
Connectors

Clamper

CN4501
(From Power P.C.B.)

Fig. 9-2

17

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best
operation of the unit.
Note: Use extreme care especially for the following.

GND Wire
of LVDS Cable

Clampers

CN2705
(To Iris
P.C.B.)

CN2502
(From Main
P.C.B.)

CN2702
(From
Fan 2)

CN2704
(From Main
P.C.B.)

CN1522
(From Main
P.C.B.)

CN2301
(From
Thermistor
2 P.C.B.)

CN2703
(From
Fan 3)

CN2701
(From Fan 1)

CN2303
(No connection)

CN2501
(From Cover
Switch P.C.B.)

Clamper

Clamper

Clamper

CN9501
(No connection)

CN9500
(From Hall-S
P.C.B.)

CN9502 (From LCD Drive P.C.B.)

CN1001
(AC Cord)

Clamper

CN1514
(From Main
P.C.B.)

Clamper

CN1520
(From
Thermal
Fuse)

Clamper

Clamper

CN1516
(From Base
P.C.B.)

Power PCB Mount Metal

Fig. 9-3

18

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best
operation of the unit.
Note: Use extreme care especially for the following.

Clamper

P2821

Thermal Fuse

(Thermistor 2 P.C.B.)

Speaker Connector

Power Switch P.C.B.

Hook

CN6801
(From Main P.C.B.)

Lamp Connector

Clamper

Clamper

Fig. 9-4

Fan3

19

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

After servicing, make sure that all wires, leads, and clampers are placed in their original position. It is important for the best
operation of the unit.
Note: Use extreme care especially for the following.

Clampers

DT10
(From SD
Card P.C.B.)

Hook

TV Unit with Digital Tuner P.C.B.

Clamper

Clamper

Fig. 9-5

CN3901
(From Base
C.B.A.)

CN6701
(From Base
C.B.A.)

20

7 Troubleshooting Guide

7.1. Troubleshooting Hints for Block Level Repair

MAIN PARTS LOCATION

<Front View>

TEMP LED

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

POWER LED

Front Cover Unit

TEMP LED

LAMP LED

Power Switch P.C.B.

Lamp Cover

Optical Cover

<Rear View>

LAMP LED

Cover Switch P.C.B.

Fan Case Unit
(Fan 1)

Projection Unit & Top Duct 3

Thermistor 2 P.C.B.

Air Filter

Thermal Fuse

Fan 3

SD Card P.C.B.

Front Jack
/Operation P.C.B.

Base P.C.B.

TV Unit & Digital Tuner P.C.B.

Digital T uner P.C.B.

Main P.C.B.

Air Filter

Air Filter

Iris P.C.B.

Note: There is not the Thermistor 1 P.C.B. in this unit.

Rear Cover

21

Fan 2

LCD Drive P.C.B.

Iris Unit

Power P.C.B.

Hall-S P.C.B.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

LED INDICATIONS FOR ERROR CONDITIONS

Each LED indication facilitates finding the cause of an error.
When an error is detected, the Lamp goes off and the LEDs on the front flash.

TEMP LED

LAMP LED

POWER LED

(Note 1, 2) (Note 3)(Note 4)

Error No.

1)

2)

3)

4)

5)

6)

7)

8)

9)

10)

11)

12)

Note:

1. The detected SOS Error 1) 2) 3) 4) 11) 12) data will be stored in the EEPROM.

2.SOS (Error) information is displayed in Service Mode (4/4).

3.LAMP OFF: The LED will flash immediately after the Lamp goes off.

4.In case of Error 9) or 10), the unit will not shut off and Dynamic Iris setting in Adv. adjust of Picture Menu will be

changed to "OFF" automatically. When the unit is turned off and turned back on, Dynamic Iris "OFF" setting remains.
Lamp LED will not flash as long as Dynamic Iris setting in Adv. adjust of Picture Menu is set to "ON" manually.

Error Information

SOS2 (Over voltage/current)

Fan 1, Fan 2 or Fan 3 stops

Abnormal voltage (DT+5V line)
IC5001 (GC4Pro) communication

error
Temperature Sensor shorted or open

(Thermistor 2 P.C.B.)
Abnormal temperature

(Thermistor 2 P.C.B.)
Clogged Air Filter

Abnormal Lamp

Iris Mechanism hardware error

Iris calibration error

Lamp Cover open
Abnormal voltage (+17V, +9V, +5V line)

for LCD Drive P.C.B.

POWER LED

flashes orange

1
2

3
5

-

-

-

-

-

-

7
8

TEMP LED

flashes red

- -

-

-

-

2
3

6

-

-

-

-

-

LAMP LED

flashes red

-

-

-

-

--

-

SOS

H10SOS2

H20FANST

H30DT9V

H50GC4PR

1
2
3

-

-

(H70LAMCV)

(H80LCDDV)

-

-

-

-

-

LAMP OFF

RESET

Power
ON/OFF

AC
ON/OFF

Power
ON/OFF

AC
ON/OFF

Power
ON/OFF

Clean
Air Filter

-

Power

-

ON/OFF

22

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

Protection Circuit

SOS terminal of IC6001 (Main microcontroller) and IC2301 (LCD Microcontroller)

IC6001 (MAIN MICROCONTROLLER)

93

108

89

CN6002-3

27

IC5001

(DIGIT AL VIDEO SIGNAL
PROCESS)

I2C SERIAL DATA0

(Error No. 11) LAMP COVER OPEN(H)
SOS2 (Error No. 1)
+5V SENS (Error No. 3)
AC STOP(L)
LAMP STATUS (Error No. 8)

I2C SERIAL DATA

I2C SERIAL CLOCK

B22

85

I2C SERIAL DATA0
(Error No. 4)

117
116

92

16 16

CN5700

19
18

CN2502

19
18

IC2301 (LCD MICROCONTROLLER)

(Error No. 2)

(Error No. 5,6) TEMPERATURE DATA1

(Error No. 7) FILTER ERROR DETECTION

35

I2C SERIAL DATA

36

I2C SERIAL CLOCK

(Error No. 12)

FAN1 LOCK(H)
FAN2 LOCK(H)
FAN3 LOCK(H)

MAIN P.C.B. LCD DRIVE P.C.B.

+17V SENS

+9V SENS
+5V SENS

CN2501-1

29
30
31

64

62

60
59

4

CN2701-3
CN2702-3
CN2703-3

CN2301-2

1) SOS2 (over voltage/current detect) detection circuit

FULL-WAVE
RECTIFIER

POWER
FACTOR
CORRECTION

T1401

1

MAIN
TRANS.

7

13
15

7
9

CN1514

9

CN6001

(+9V)

Q1102,
Q1105

SW

IC1102

+5V

1

REG

IC1103

+2.5V

1

REG

IC1100

DC-DC
CONVERTER

(Over voltage Detect)

POWER P.C.B. MAIN P.C.B.

2) Fan1, Fan2 or Fan3 stopped detection circuit

IC6001 (MAIN MICROCONTROLLER)

IC2301 (LCD MICROCONTROLLER)

+9V

DT+9V

2

2

Q1108,

Over

Q1109

IC2702

2

DRIVE

IC2703

2

DRIVE

IC2704

2

DRIVE

4

4

4

current
Detect

Q1106,
Q1107

(+7V)

(+8V)

(+7V)

SOS

SW

+3.3V

IC6001

(MAIN
MICROCONTROLLER)

Normal

93

SOS2

CN2701-1
CN2701-2
CN2701-3

CN2702-1
CN2702-2
CN2702-3

CN2703-1
CN2703-2
CN2703-3

DT+5V

SW+2.5V

SW+3.3V

FAN1

FAN2

FAN3

I2C SERIAL DATA

I2C SERIAL CLOCK

117
116

MAIN P.C.B. LCD DRIVE P.C.B.

19
18

19
18

CN5700

CN2502

I2C SERIAL

35

DATA

36

I2C SERIAL
CLOCK

23

FAN1 LOCK(H)
FAN2 LOCK(H)
FAN3 LOCK(H)

29
30
31

SOS

Normal

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

3) Abnormal voltage (DT+5V line) detection circuit

DT+5V

IC6001 (MAIN MICROCONTROLLER)

Normal

+5V SENS

108

SOS

SOS: 0V on DT+5V line

MAIN P.C.B.

4) IC5001 (GC4PRO) communication error detection circuit

IC5000

(MAIN VIDEO SIGNAL PROCESS)

I2C SERIAL CLOCK0

I2C SERIAL DATA0

IC5801

(HDMI INTERFACE)

I2C SERIAL CLOCK0

I2C SERIAL DATA0

IC5001

(DIGITAL VIDEO SIGNAL PROCESS)

I2C SERIAL CLOCK0

I2C SERIAL DATA0

A23
B22

82
81

acknowledge

28
27

IC1102

+5V

2

1

REG

IC6001 (MAIN MICROCONTROLLER)

84

I2C SERIAL CLOCK0

85

I2C SERIAL DATA0

SOS: No acknowledge reply

+9V

MAIN P.C.B.

5, 6) Temperature Sensor error (shorted, open, or abnormal) detection circuit

IC6001 (MAIN MICROCONTROLLER)

I2C SERIAL DATA

I2C SERIAL CLOCK

117
116

19
18

CN5700

CN2502

IC2301 (LCD MICROCONTROLLER)

I2C SERIAL

35

19
18

DATA

36

I2C SERIAL
CLOCK

TEMPERATURE

DATA1

64

MAIN P.C.B. LCD DRIVE P.C.B.

7) Clogged air filter detection circuit

IC2702

4

2

DRIVE

SOS

Normal

IC2705

62

1

IC6001 (MAIN MICROCONTROLLER)

I2C SERIAL DATA

I2C SERIAL CLOCK

61
61

19
18

19
18

CN5700

CN2502

+9V

IC2301 (LCD MICROCONTROLLER)

I2C SERIAL

35

DATA

36

I2C SERIAL
CLOCK

FILTER ERROR

DETECTION

2
1

3
2

R2821
TEMPERATURE

SENSOR

2
1

CN2301

P2821

THERMISTOR 2

CN2701-1
CN2701-2
CN2701-3

P.C.B.

FAN1

MAIN P.C.B. LCD DRIVE P.C.B.

24

8) Abnormal Lamp detection circuit

IC6001

(MAIN MICROCONTROLLER)

ON

OFF

Q6012

LAMP ON(H)

LAMP STATUS

18

27

SOS Normal

SOS: Lamp does not light up
Normal: Lamp ON

Q6011

Q6001 Q6000

1 1

3 3

CN6002

CN1522

Q1602

16

13

LAMP ON(H)

16

13

CN1401

LAMP STATUS
(ON(H)/OFF (L))

POWER P.C.B.MAIN P.C.B.

PT-52LCX66 / PT-56LCX66 / PT-61LCX66 / PT-52LCX16 / PT-56LCX16

POWER CONTROL
CIRCUIT 2

9), 10) Iris Mechanism hardware error/Iris calibration error detection circuit

IC5001

(DIGITAL SIGNAL
PROCESS)

GC4PRO

I2C SERIAL
I2C SERIAL

DATA

CLOCK

B22
A23

IC6001

(MAIN
MICROCONTROLLER)

I2C SERIAL
I2C SERIAL

I2C SERIAL

85

DATA

84

I2C SERIAL
CLOCK

DATA

CLOCK

117
116

19
18

19
18

CN5700

CN2502

5
4

5
4

CN2705

CN9502

IC9502

IRIS
MICRO­CONTROLLER

IC9500,
IC9501,
ETC

IRIS
CONTROL

LCD DRIVE

MAIN P.C.B.

P.C.B.

IRIS P.C.B.

11) Lamp cover open detection circuit

IC6001 (MAIN MICROCONTROLLER)

NormalSOS

LAMP COVER OPEN(H)

92

16 16

CN5700

CN2502

CN9500

1
2

CN2501

1
2

P2912

CN9700

SW2911
COVER SW

IRIS UNIT

HALL-S
P.C.B.

HALL
ELEMENT

CN9701

M

IRIS MOTOR

IRIS
MECHANISM
UNIT

MAIN P.C.B. LCD DRIVE P.C.B.

12) Abnormal voltage (+17V, +9V, +5V lines) detection circuit

IC6001 (MAIN MICROCONTROLLER)

I2C SERIAL DATA

I2C SERIAL CLOCK

117
116

MAIN P.C.B. LCD DRIVE P.C.B.

19
18

19
18

CN5700

CN2502

IC2301

(LCD MICROCONTROLLER)

+17V SENS

I2C SERIAL

35

DATA

36

I2C SERIAL
CLOCK

+9V SENS

+5V SENS

25

COVER SWITCH

P.C.B.

Normal

60

59

4

SOS

Normal

SOS

Normal

SOS

+17V

+9V

+5V