Panasonic TC-32LX70/70 Quick start guide

Panasonic Service and Technology Company
National Training
TC-32LX70/700, TC37LZ85, and TC-32LX85 LCD Display Television
Technical Guide

Prepared by
Jean Magloire
Panasonic Service and Technology Company
National Training
Warning
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does
not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products
powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair
the product or products dealt with in this service information by anyone else could result in serious injury or death.
Copyright © 2008 by Panasonic Services Company
All rights reserved. Unauthorized copying and distribution is a violation of law.

Table of Contents
3
Subject Page # Subject Page #
Topics 5Self-Check Menu 38
2007 LCD TV Specifications 7Check Point 39
P.C.B Layout (LX700) 8Serviceman Mode 40
P.C.B Layout (LX70) 9Serviceman Mode Menu and Navigation 41
P.C.B Layout (LX700 Pictorial) 10 Adjustment Data 42
P.C.B Layout (LX700 Connectors) 11 SRV-TOOL 43
P.C.B Layout (LX700 LVDS Connector) 12 Voltage chart of AP-board 45
TC-32LX700 Board Description 13 Voltage chart of P and A boards 46
P Board – Main Power Board 15 Voltage chart of DT board 47
Main MPU (Power On Commands) 17 Troubleshooting Signal Problems 49
Standby Operation 19 Picture NG and Sound OK (LX700/LX70 ) 50
SUB Voltages and Over-voltage Protection 21 Picture OK and Sound NG (LX700/LX70) 51
Main Voltages and Over-voltage Protection 22 Picture NG and Sound NG (LX700/LX70 ) 52
Inverter_On Command and Protection 23 No Picture from TV Reception 53
Video Process Block Diagram 25 No Picture 54
Audio Process Block Diagram 27 No Video, Dark Blue Screen 55
MPU SOS Inputs and Blink Codes 29 No Audio 57
Over-Current Protection Circuit 31 No Power 58
Over-Current Protection Circuit 2 33 Power LED Blinks One Time (INV_SOS) 60
Power LED Timing Table 35 Power LED Blinks Three Times (TV_SOS) 61
Self-Check and Reset Function 37 Power LED Blinks Four Times 62

Purposely Left Blank
2008 LCD Television Models 63
Full HD TC-LZ85 & HD TC-LX85 Series 64
Chassis structure (37 Full HD type) 65
Chassis structure (37 HD type) 66
Signal Circuit Block Diagram 67
TC-32LX85 / TC37LZ85 Signal Circuit Block Diagram 68
TC37LZ85 Signal Circuit Block Diagram 69
TC32LX85 Signal Circuit Block Diagram 71
TC37LZ85 Audio Circuit Block Diagram 73
TC32LX85 Audio Circuit Block Diagram 75
Power Supply Overview 77
Power Supply Description 78
Self-Check and Reset Function 80
SOS and Power LED Indication 81
Power LED Blinks 1 Time 82
Power LED Blinks 3 Times 83
Power LED Blinks 4 or 5 Times 84
Power LED Blinks 6 or 7 Times 85
Power LED Blinks 8 or 9 Times 86
Power LED Blinks 1 Time (TC-32LX85) 87
Power LED Blinks 3 Times (TC-32LX85) 88
Power LED Blinks 4 or 5 Times (TC-32LX85) 89
Power LED Blinks 6 or 7 Times (TC-32LX85) 90
Power LED Blinks 8 or 9 Times (TC-32LX85) 91
Picture Defect) 92
Sound Defect 104
Service Information for 2008 models 105
Internal Pattern generator 106
Copy from the TV to the SD Card 109
Copy Data from the SD Card to the TV 115
Copy Self Check Data to the SD Card 117
Local maintenance 120
Picture Refresh Mode 128
Table of Contents
4

1. Models Comparison
2. Boards Layout
3. Power supply/Standby/Power on
4. Troubleshooting
5. SOS Circuit
6. Video/Audio Processing Circuit
7. Panel Drive Circuit
8. Service Man Mode
9. Self-Check
10.Reset
11.Adjustments
12.Service Information for 2008 models
Topics
5

Purposely Left Blank
Purposely left blank
6

2007 LCD TV Specifications
TC-32LX700 TC-32LX70
VIDEO
Screen Size Diagonal (inches) 32 32
Aspect Ratio 16:9 16:9
Number of Pixels 1,049,088 (1,366 x 768) 1,049,088 (1,366 x 768)
Brightness (Panel Luminance) 500 cd/m2 500 cd/m2
Display Capability (1080p, 1080i, 720p, 480P) Y Y
Motion Picture Pro Y —
AUDIO
Speakers Slim squawker x 2, woofer x 2 (L, R) Full-range x 2 (L, R)
Audio Output 20 W (10% THD) 20 W (10% THD)
JACKS
Integrated ATSC Tuner Y Y
SD Memory Card Slot Y (SDHC Compatible) —
HDMI Input 2 2
Composite Video Input 3 (1 side) 3 (1 side)
S-Video Input 2 2
Component Video Input (Y, PB
, PR ) 1 1
Monitor Output 1 1
Digital Audio Output 1 1
Headphone Jack 1 1
7

32/26LX600
AP
P
A
SP
DT
SP V
(HDMI)
KEY Control
P.C.B Layout (LX700)
P.C.B Layout (LX700)
Differences from LX600:
GS board for SD card slot is added.
The inverter PCB of the LX700 is visible.
AP
P
A
SP
DT
SP V
(HDMI)
KEY Control
INV
SP
SP
G
32LX700
GS
SP
G
SP
8

32/26LX60
AP
P
A
SP
DT
SP V
(HDMI)
KEY Control
32/26LX70
P.C.B Layout (LX70)
P.C.B Layout (LX70)
AP
P
A
SP
DT
SP V
(HDMI)
KEY Control
GG
Differences from LX60:
Board structure is almost same.
9

P.C.B Layout (LX700 Pictorial)
P.C.B Layout (LX700 Pictorial)
10 P Board
AP Board DT BoardG Board
GS Board
A Board Inverter PCB
V Board
Key Control