Sony NWZX1061FBLK Service Manual - Page 7

NWZ-X1050/X1051/X1060/X1061 Note: Refer to page 27 for the schematic diagram. Refer to page 28 for the printed wiring boards. METHOD OF JUDGING RIGHT AND WRONG OF PARTS RELATED TO SWITCH In this set, only a part of parts that relate to the switch are supplied. Exchange the entire mounted board when parts that do not correspond to it are defective. The right and wrong of the switch can be judged by the following two methods. 1. Judgment From The Test Mode Judge the right and wrong of the switch referring to "4-4-2. Key check" (page 22). 2. Judgment from the voltage measurement Judge the right and wrong of the switch by the voltage measurement with a test point. 2-1. [u]/[>]/[.] keys Connection: digital voltmeter CL881 (KEY_AD0) + CL885 (GND) - When the voltage value is below, [u]/[>]/[.] keys are normal. • [u] key is pressed : 0 to 0.25 V • [>] key is pressed : 0.4 to 0.6 V • [.] key is pressed : 0.76 to 0.95 V 2-2. [VOL +]/[VOL -]/[HOME] keys Connection: digital voltmeter Connection location: - MAIN Board (Side B) - S881 S881 2 (HOLD SW) 1 CL882 (KEY_AD1) CL885 (GND) CL881 (KRY_AD0) CL882 (KEY_AD1) + CL885 (GND) - When the voltage value is below, [VOL +]/[VOL -]/[HOME] keys are normal. • [VOL -] key is pressed : 0 to 0.25 V • [VOL +] key is pressed : 0.4 to 0.6 V • [HOME] key is pressed : 0.76 to 0.95 V 2-3. HOLD switch (S881) Connection: digital voltmeter S881 (HOLD SW pin 2) + CL885 (GND) - When the voltage value is below, HOLD switch (S881) is normal. • HOLD switch is turned on : 2.85 V • HOLD switch is turned off : 0 V 7