Sony NWZA816P Service Manual - Page 12

NW-A805/A806/A808/NWZ-A815/A816/A818 SECTION 4 TEST MODE Note: Information on the test mode must correspond in enough security. When the leakage has been revealed by any chance, the source of information is specified. 4-1-1. Power supply voltage check This mode is used in case power supply voltage in the state where all power supply lines are starting is checked. 1. SETTING THE TEST MODE Note: Perform the test mode in the state of 3.6 V or more in the battery voltage. Setting method: 1. Turn the power on. 2. Press the [BACK] key for 1.5 seconds or more, the home menu is displayed. 3. Slide the [HOLD] key to set the hold on. 4. While pressing the [OPTION] key, press the key as follow- ing order. v → B → V → b → v → u → v → b → V → B → v → u 5. The set reboots when the [HOLD] key is slided to set the hold off, and the color bar is displayed in the liquid crystal display. 6. Enter the test mode when the [BACK] key is pressed in the state of step 5. Note: The destination setting and sound pressure regulation set- ting cannot be executed by this test mode. Checking method: 1. Enter the test mode. 2. Press the v / V key to select the "POWER", and press the B key to enter the minor item. 3. Press the v / V key to select the "VCHK". 4. Press the u key, all power supply lines are started. liquid crystal display POWER VCHK 2. RELEASING THE TEST MODE 1. Display the major item selection screen. 2. Press the v / V key to select the "EXITTEST", and press the B key to select the "SURE ?". 3. Press the u key, turn the power off and release the test mode. 3. CONFIGURATION OF THE TEST MODE Major item Major item switching: [v]/ [V] key [B] key [b] key Minor item [u] key Minor item switching: [v]/ [V] key Start [BACK] key Automatic Finish or Result 4. OPERATION OF THE TEST MODE 4-1. Power liquid crystal display MPTAPP MENU POWER AUDIO VIDEO OTHER SHUTDOWN EXITTEST VCHK ACHK DSVCHK CHGCHK BATTCHK START In this state, the power supply voltage of each power supply line can be confirmed by measuring the voltage. 5. Press the [BACK] key, return to minor item selection screen. 4-1-2. Consumption current (audio playback) check This mode is used in case consumption current (audio playback) is checked in the state where "1 kHz 0 dBs L-ch/R-ch VOLUME: 15" audio signal is outputed. Checking method: 1. Enter the test mode. 2. Press the v / V key to select the "POWER", and press the B key to enter the minor item. 3. Press the v / V key to select the "ACHK". 4. Press the u key, "1 kHz 0 dBs L-ch/R-ch VOLUE: 15" audio signal is outputed. liquid crystal display POWER ACHK 1kHz 0dBs L/Rch HPOUT [ VOL: 15 ] START 5. In this state, each time the [OPTION] key is pressed, LCD back light on/off switch is performed. 6. Press the [BACK] key, return to minor item selection screen. 12