Panasonic PT-50LCZ70 - 50" Rear Projection TV User manual

©2007 Panasonic Shikoku Electronics Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
PT-50LCZ70
PT-56LCZ70
PT-61LCZ70
PT-50LCZ7
PT-56LCZ7
PT-61LCZ7
PT-50LCZ70-K
PT-56LCZ70-K
PT-61LCZ70-K
Vol. 2
Multi Media Display
ORDER NO. MKE0706853CE

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 41
5.1. Optical Section 41
6 Measurements and Adjustments 49
6.1. Adjustment Procedures 2 49
7 Maintenance 56
7.1. Cleaning Methods 56
8 Block Diagrams 57
9 Schematic Diagrams 65
9.1. SCHEMATIC DIAGRAM & CIRCUIT BOARD LAYOUT
NOTES 65
9.2. MAIN SCHEMATIC DIAGRAMS 66
9.3. DRIVE SCHEMATIC DIAGRAMS 89
10 Printed Circuit Board 99
10.1. MAIN P.C.B. 99
10.2. DRIVE P.C.B. 109
11 Appendix Information of Schematic Diagram 111
11.1. CHECKING POINT TABLE OF THE CSP IC 111
11.2. WAVEFORM TABLE 116
12 Exploaded Views 118
12.1. OPTICAL UNIT SECTION 118
12.2. MAIN P.C.B. UNIT AND TOP DUCT UNIT SECTION 119
13 Replacement Parts List 120
13.1. REPLACEMENT NOTES 120
13.2. MECHANICAL REPLACEMENT PARTS LIST 121
13.3. SERVICE FIXTURES AND TOOLS REPLACEMENT
PARTS LIST 121
13.4. ELECTRICAL REPLACEMENT PARTS LIST 121
CONTENTS
Page Page
2
PT-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7

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-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7

2 Service Mode
LAMP Indicator
POWER Indicator
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)
-
-
-
12 Lamp does not light up
9 Lamp failure
10 Abnormal Lamp temperature
11 Lamp communication error
5 IC4501 (Audio Amp) failure
8
9
10
11
12
13
-
-
-
-
-
-
-
-
14 Lamp Fan stops
15 Fan Case Unit (OPT Fan) stops
16 Front Fan or Rear Fan stops
17 Rear Fan or Front Fan stops
13 Rear Jack PCB connection error
8 Abnormal Lamp input voltage (+26V)
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-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7
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./
Drive 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-50LCZ70 / PT-56LCZ70 / PT-61LCZ70 / PT-50LCZ7 / PT-56LCZ7 / PT-61LCZ7
5