TH-80BF1U, TH-80BF1W, TH-80BF1E - Panasonic TV Service Manual (repair manual). Page 21

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INF-13
SECTION 1 SERVICE INFORMATION
<80BF1>
4. Troubleshooting Guide
The failure symptom "Power off" or "No picture or No sound" is reported but it can not be confirmed in the service, use this 
function to confirm the failure status and narrow down the failure circuit.
4.1. Self check of signal system
4.1.1. Display Indication
1. Method A Self-check only (A shipment setup is not carried out).
  1.1. Display the CAT mode (Refer to 3.1.).
  1.2.  The CAT mode menu appears on the screen. Select the [ID Mode] menu with [pq] buttons, and press and hold the 
[MUTE] button until the ID mode menu appears. (It takes a few seconds to display it.)
2. Method B Self-check+Shipment setup
  2.1. Press and hold the button on the right side of the unit and press the OFF-TIMER button on the remote control.
To exit the ID mode
Turn the Display off with remote control or unit.
CAT Panel sys.8.2
IIC Mode
CD Mode
NW Mode
SD Mode
MS Mode
ID Mode
Method A
Main unit + remote control operation
Press and hold the VOL down button on the right side of the unit and press the RECALL button on the remote control 3 times quickly 
within 2 second, this will place the unit into the CAT mode.
Method B
Remote control operation only
1. Set the OFF timer except for [0] minute by OFF TIMER button. (30 minutes, 60 minutes, 90 minutes)
2. Set the volume level of sound to 0 by VOL down button / -button.
3. Press the RECALL button more than 3 seconds before a volume display disappears. 
Main unit
Remote control
Button
Button
Press and hold
Right side of the unit
OFF TIMER
- 19 -
6 故障診断法
サービスの際「時々、電源切れ」、
「時々、映像・音声なし」の症状が確認できない時、自己診断機能を用いること
で発生有無の確認と故障回路の絞込みができます。
6.1.
信号系の自己診断
セルフチェックの表示方法は2通りあります。
①セルフチェックのみ(出荷設定はしない)
②セルフチェック+出荷設定
■表示方法
①の場合:市場調整モードの「ID MODE」選択し、リモコン「MUTE」ボタンを長押し(3秒)します。
(市場調整モードの表示方法は、5.1.参照)
②の場合:本体「音量-」ボタンを押しながら、リモコン「OFF TIMER」ボタンを押します。
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