Panasonic PT-56LCX70 - 56" Rear Projection TV User manual

©2007 Panasonic Shikoku Electronics Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
PT-56LCX70
PT-61LCX70
PT-50LCX7
PT-56LCX7
PT-61LCX7
PT-50LCX7K
PT-56LCX70-K
PT-61LCX70-K
Vol. 2
Multi Media Display
ORDER NO. MKE0706851CE

1 Service Navigation 3
1.1. Introduction 3
1.2. About Lead Free Solder (PbF) 3
2 Service Mode 4
3 Troubleshooting Guide 11
3.1. Troubleshooting Hints for Component Level Repair 11
4 Service Fixture & Tools 27
4.1. Service Fixture and Tools 27
4.2. Service Position 29
4.3. Replacement Procedures for CSP (Chip Size Package) IC
37
5 Disassembly and Assembly Instructions 39
5.1. Optical Section 39
6 Measurements and Adjustments 46
6.1. Adjustment Procedures 2 46
7 Maintenance 53
7.1. Cleaning Methods 53
8 Block Diagrams 55
9 Schematic Diagrams 61
9.1. SCHEMATIC DIAGRAM & CIRCUIT BOARD LAYOUT
NOTES 61
9.2. MAIN SCHEMATIC DIAGRAMS 62
9.3. VOLTAGE CHART 91
10 Printed Circuit Board 97
10.1. MAIN P.C.B. 97
11 Appendix Information of Schematic Diagram 107
11.1. CHECKING POINT TABLE OF THE CSP IC 107
11.2. WAVEFORM TABLE 109
12 Exploaded Views 110
12.1. OPTICAL UNIT SECTION 110
12.2. MAIN P.C.B. UNIT AND TOP DUCT UNIT SECTION 111
13 Replacement Parts List 112
13.1. REPLACEMENT NOTES 112
13.2. MECHANICAL REPLACEMENT PARTS LIST 113
13.3. SERVICE FIXTURES AND TOOLS REPLACEMENT
PARTS LIST 113
13.4. ELECTRICAL REPLACEMENT PARTS LIST 113
CONTENTS
Page Page
2
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

1 Service Navigation
1.1. 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.
1.2. About Lead Free Solder (PbF)
3
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7

2 Service Mode
LAMP Indicator
POWER Indicator
0A
10
8
Abnormal voltage (POWER+17V line)
Error Information Priority
LAMP OFF
RESET
LAMP Indicator
flashes red
SOS
(Note 1)
(Note 2)
POWER Indicator
flashes orange
Note:
1. The detected Error data will be stored in the EEPROM, and SOS History (Code) is displayed in Self Check mode
or Service Adjust mode (SRV-TOOL).
2. The Lamp Indicator will flash X5 immediately after the Lamp goes off. For this SOS only, the TV power will remain on.
1
AC
ON/OFF
AC
ON/OFF
Power
ON/OFF
Power
ON/OFF
2
3
4
6
7
Over voltage/Over current (SOS) 01
02
03
04
0D
0C
0B
0A
09
08
05
04
03
02
09
07
06
1
2
3
4
5
2
3
4
6
7
9
-
Abnormal voltage (DTV+9V line)
Abnormal voltage (SUB+5V line)
-
-
Abnormal voltage (MAIN+3.3V line) -
-
-
Communication error between Peaks (IC8001)
and TV Microcontroller (IC6004)
Communication error between Peaks (IC8001)
and TV Microcontroller (IC6004)
-
-
-
-
13 Lamp does not light up
10 Lamp failure
11 Abnormal Lamp temperature
12 Lamp communication error
5 IC4501 (Audio Amp) failure
8
9
10
11
12
13
-
-
-
-
-
-
-
-
15 Lamp Fan stops
16 Fan Case Unit (OPT Fan) stops
17 Front Fan or Rear Fan stops
18 Rear Fan or Front Fan stops
14 Rear Jack PCB connection error
9 Abnormal Lamp input voltage (+28V)
INDICATIONS FOR ERROR CONDITIONS
Each Indicator facilitates finding the cause of an error.
When an error is detected, the Lamp goes off and the indicators on the front flash.
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
4

MAIN PARTS LOCATION
Fan Case Unit
(OPT Fan)
Thermal Fuse
Air Filters
OPT/TV Unit
Front Cover Unit
Front Jack
/Operation P.C.B.
Power Switch
/Operation P.C.B.
SD/HDMI P.C.B.
<FrontView>
<RearView>
LAMP LED
POWER LED
Front Door
Rear Cover
Main P.C.B.
Tuner P.C.B. Rear Jack P.C.B.
Power P.C.B.
RF AMP
Power Supply P.C.B.
Lamp Unit
Lamp Fan
Top Duct Unit
Front Fan
Rear Fan
Support
Shield
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
5

SERVICE ADJUST MODE
In this mode, the following information can be confirmed on the
screen:
ADJUST
- Contrast adjustment
WB-ADJ
- White Balance adjustment
OPTION
- Current Lamp elapsed time
RM-SET (Not used for service)
SRV-TOOL
- SOS History
- The number of times of the power has turned on
- Current Power on elapsed time
MMD-CHK
- Focus, Tilt, H/V Picture Position adjustment
- Internal pattern for LCD-CHK, GC-CHK
Fig. 2-1
Service Adjust Mode
Enter:
VOLUME DOWN button + RECALL key (3 times)
(in power on condition)
Exit from Main Menu:
Power OFF.
RECALL (X3)
VOL
(on the front)
_
(on the remote)
<Main Menu>
SRVICE
ADJUST
WB-ADJ
OPTION
RM-SET
SRV-TOOL
MMD-CHK
<ADJUST 1/4>
<OPTION 1/3>
<RM-SET 1/1>
<SRV-TOOL 1/2>
<MMD-CHK 1/8>
ADJUST
CONTRAST
YMAX
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
OK 3sec:AUTO ADJUST
VOL:ADJUST
VIVID
200
394
OPTION
Boot
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
ROM
RM-SET
VIVID
A
1,2:MAIN SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
SRV-TOOL VIVID
00
1,2:MAIN SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
MMD-CHK
FREQ
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
ON
1 key 2 key
1 key 2 key
1 key 2 key
1 key 2 key
1 key 2 key
1 key 2 key
1 key
2 key
<WB-ADJ 1/8>
WB-ADJ
R-CUT
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
80
80
HD
NORMAL
COOL
CAUTION:
Do not change any parameters!
Peaks SOFT
Peaks EEP
LSI DATA
GenX SOFT
GenX EEP
GenX ROMCOR
FACTDATA
0.480
0.16
0.00.5b
0.15.60
0.00.00
0.00.00
12FF-FFFF
<Main Menu>
SRVICE
ADJUST
WB-ADJ
OPTION
RM-SET
SRV-TOOL
MMD-CHK
Peaks software
version
Peaks EEPROM
data version
TV Microcontroller
EEPROM data version
TV Microcontroller
software version
Peaks SOFT
Peaks EEP
LSI DATA
GenX SOFT
GenX EEP
GenX ROMCOR
FACTDATA
0.480
0.16
0.00.5b
0.15.60
0.00.00
0.00.00
12FF-FFFF
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
6

ADJUST 1/4~4/4
Perform the Contrast adjustment by pressing OK key when replacing EEPROM IC (IC8201).
Fig. 2-2
WB-ADJ 1/8~8/8
Perform the White Balance adjustment by pressing VOL+/- key.
<ADJUST 1/4> <ADJUST 1/4> <ADJUST 1/4> <ADJUST 1/4>
ADJUST
CONTRAST
YMAX
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
OK 3sec:AUTO ADJUST
VOL:ADJUST
VIVID
200
394
ADJUST
COLOR
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
34
ADJUST
TINT
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
0
ADJUST
SUB-BRT
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
800
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
(Not used for service)
(Not used for service)
4 key 4 key 4 key
<WB-ADJ 1/8> <WB-ADJ 2/8> <WB-ADJ 3/8> <WB-ADJ 4/8>
WB-ADJ
R-CUT
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
80
80
HD
NORMAL
COOL
WB-ADj
G-CUT
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
80
80
HD
NORMAL
COOL
WB-ADj
B-CUT
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
80
80
HD
NORMAL
COOL
WB-ADj
R-DRV
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
FF
FF
HD
NORMAL
COOL
3 key
4 key
3 key 3 key
3 key
4 key
(Not used for service) (Not used for service)
<WB-ADJ 5/8> <WB-ADJ 6/8> <WB-ADJ 7/8> <WB-ADJ 8/8>
WB-ADj
G-DRV
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
FF
FF
HD
NORMAL
COOL
WB-ADj
B-DRV
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
FF
FF
HD
NORMAL
COOL
WB-ADj
ALL-CUT
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
80
80
HD
NORMAL
COOL
WB-ADj
ALL-DRV
BEFORE
FORMAT
ASPECT
COLOR TEMP
1,2:MAIN SELECT
3,4:SUB SELECT
7 :COLOR TEMP SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
FF
FF
HD
NORMAL
COOL
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
7

OPTION 1/3~3/3
Confirm the current elapsed “Lamp operation”time in hours, in hexadecimal. (limit: FFFF)
SRV-TOOL 1/2~2/2
Confirm the number of times the power has turned on, the current elapsed “Power on”time in hours and minutes. (limit: 65535:00)
and SOS History.
Current elapsed "Lamp operation" time
eg.) 01F5
<OPTION 1/3> <OPTION 2/3> <OPTION 3/3>
OPTION
Boot
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
ROM
OPTION
Emergency
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
ON
OPTION
CURRENT LAMP
RESET COUNT
1,2:MAIN SELECT
3,4:SUB SELECT
5,6:PLACE
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
01F5
00
3 key
4 key
3 key
4 key
3 key
4 key
501 hour
SRV-TOOL
TD2Microde:81c0000f
Flash ROM:1-227E
PTCT:L09.L0a.000.L09.L0a
SRV-TOOL
TD2Microde:81c0000f
Flash ROM:1-227E
PTCT:000.000.000.000.000
Time 00512:20 Count 0000048
SOS History
eg.) PTCT: P04.L0b.L0b.P04.L0b
Exit from SRV-TOOL 2/2:
Unplug the AC Cord.
latest SOS
previous SOS
the 2nd SOS after shipment/last self check
the 1st SOS after shipment/last self check
the SOS before previous
Current elapsed "Power on" time
eg.) Time 00512:20
512 hour /20 min.
48 times
<SRV-TOOL 1/2> <SRV-TOOL 2/2> <SRV-TOOL 2/2>
SRV-TOOL VIVID
00
1,2:MAIN SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
OK key
MUTE key
(for over 3 sec.)
Select and
The number of times the power has turned on
eg.) Count 0000048
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
8

CAUTION:
Do not change any parameters!
<SRV-TOOL>
(Not used for service)
<MMD-CHK 1/8> <MMD-CHK 2/8> <MMD-CHK 3/8> <MMD-CHK 4/8> <MMD-CHK 5/8> <MMD-CHK 6/8> <MMD-CHK 7/8> <MMD-CHK 8/8>
MMD-CHK
FREQ
1,2:MAIN SELECT
3,4:SUB SELECT
9 :PICTURE MENU SELECT
VOL:ADJUST
VIVID
ON
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key
Internal Pattern for
LCD-CHK (Figure. A) Internal Pattern for GC-CHK (Figure. B)
VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
VOL+ key VOL- key
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
3 key
4 key
(Not used for service)
(Not used for service)
OPT HPOS 0024 OPT HPOS 001F
MMD-CHK 1/8~8/8 and internal pattern
Perform the Picture Position adjustment by pressing VOL+/- key, and display the internal pattern for LCD-CHK, GC-CHK.
Note:
Press 1 key to return Main Menu.
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
9

TUNER DIAGNOSTIC MODE
TUNER DIAGNOSTIC
Enter:
VOLUME UP button + VOLUME UP key
(for more than 5 seconds in power on condition)
Exit:
Press EXIT key.
(on the front)
++
VOL
(on the remote)
TUNE CH
Current CH
Mode
Frequency
Lock Status
SNR
4(4)
0.338
N/A
67.75 MHz
Unlocked
---dB
TUNE Status
Soft Version
Digital
Type
Unlocked
PCR Status
N/A
PCR pid
N/A
Video pid
N/A
Audio pid
N/A
Audio type
CC Waiting
CC
System
FAT Status
Press Exit to return.
Press UP/DOWN or NUMBER,and OK to change the channel.
Video/Channel Status
<Tuner Diagnostic>
VOL
EEPROM IC (IC5504) CAUTION
DO NOT copy any of data of EEPROM IC (IC5504) on the Main
P.C.B. using the ROM Writer. (It has HDCP key data.)
LAMP CAUTION
The Lamp Unit becomes very hot during operation. When
replacing the Lamp Unit, wait until it has cooled off (1 hour or
more).
TOP DUCT UNIT NOTE
The optical parts will be exposed to the dust in the air when the
Top Duct Unit is removed. Therefore, it is strongly recommend
to remove the Top Duct Unit only in a clean room.
EEPROM IC (IC8201) CAUTION
DO NOT copy any of data of EEPROM IC (IC8201) on the Main
P.C.B. using the ROM Writer. (It has CPRM key data of
GallayPlayer.)
PT-56LCX70 / PT-61LCX70 / PT-50LCX7 / PT-56LCX7 / PT-61LCX7
10