Sharp LC-32LD135K (serv.man2) Service Manual ▷ View online
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LC-32LD135
F. USB Problems
Problem: USB is not working or no USB Detection. Check USB Supply, It should be nearly 5V. Also
USB Enable should be logic high.
USB Enable should be logic high.
G. No Sound Problem
Problem: No audio at main TV speaker outputs.
Check supply voltages of 24V VDD_AUDIO, 3.3V AUDIO_AVDD and AUDIO_DVDD with a
voltage-meter. There may be a problem in headphone connector or headphone detect
Check supply voltages of 24V VDD_AUDIO, 3.3V AUDIO_AVDD and AUDIO_DVDD with a
voltage-meter. There may be a problem in headphone connector or headphone detect
circuit (when headphone is connected, speakers are automatically muted). Measure voltage at
HP_DETECT pin, it should be 3.3v.
HP_DETECT pin, it should be 3.3v.
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H. Standby On/Off Problem
Problem: Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check main supplies with a voltage-meter. Also there
may be a problem about SW. Try to update TV with latest SW. Additionally it is good
to check SW printouts via Teraterm. These printouts may give a clue about the problem. You can use
Scart-1 for terraterm connection.
Problem: Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check main supplies with a voltage-meter. Also there
may be a problem about SW. Try to update TV with latest SW. Additionally it is good
to check SW printouts via Teraterm. These printouts may give a clue about the problem. You can use
Scart-1 for terraterm connection.
I. No Signal Problem
Problem: No signal in TV mode.
Check tuner supply voltage; 5V_VCC, 3V3_TUNER and 1V8_TUNER. Check tuner options are
correctly set in Service menu. Check AGC voltage at IF_AGC pin of tuner.
correctly set in Service menu. Check AGC voltage at IF_AGC pin of tuner.
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16. Service Menu Settings
In order to reach service menu, first Press “MENU” button, then write “4725” by using remote
controller. You can see the service menu main screen below. You can check SW releases by using this
controller. You can see the service menu main screen below. You can check SW releases by using this
Menu. In addition, you can make changes on video, audio etc. by using video settings, audio settings
titles.
titles.
Service Menu Main Screen
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Audio Settings
Video Settings
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