Sony wm fx 855 service manual

Page 2

Ð 3 Ð SECTION 1 SERVICE NOTE Service Mode Mode for operating the mechanism section with the AUDIO board opened. 1. Setting 1) Refer to ÒDisassemblyÓ, and remove the cabinet and open the AUDIO board. 2) Connect the motor and plunger to the AUDIO board using jumper wires. These can be connected easily with the use of the extension tool (1-769-143-11) (ten in one set). 3) Turn ON the HOLDER switch (S706). 4) Input the square wave or sine wave to PH701. (See right fig- ure.) 5) Supply 1.5 V to the Ô and Õ terminals of the battery using a regulated power supply. 2. Preset state To set the PLAY, FF, REW modes, the preset state must be set. 1) Check that the lever (FR SW) and FWD/RVS switch (S708) are set to the center position. If not, set the preset state as fol- lows. 2) Move the FWD/RVS switch (S708) to the side which the lever (FR SW) is facing. 3) The lever (FR SW) will move when the regulated power sup- ply switch is set to OFF once and then set to ON. Move the FWD/RVS switch (S708) according to this timing and set to the center position. 3. FF, REW Modes 1) Check that the preset state is set and press the FF and REW switches. 4. PLAY mode 1) Check that the preset state is set. 2) Pressing the » á switch will move the lever (FR SW) once towards the F side and then to the R side. Moving the FWD/ RVS switch (S708) according to this timing will set the PLAY mode (R side). Pressing the » á switch another time and moving the FWD/RVS switch (S708) according to the move- ment of the lever (FR SW) will set the PLAY ( F side) mode. Note 1:If the above fails, perform from preset again. Note 2:Use the » á, ¹, FF, REW switches on the remote commander as much as possible. If no remote commander, do not touch the switches with your hands, but using a stick with a round tip. Note 3:When using headphones, the timing for moving the S708 can be determined from the beep sound. Audio Board Ñ Side A Ð Battery terminal (-) Connect to motor Connect to plunger CN501 IC501IC301 Battery terminal (+) Ñ Side B Ñ S708 FWD/RVS Switch (FWD ¬ STOP ® RVS) S706 (HOLDER Switch)side F side R Center IC701 PH701 AF OSCILLATORSguare wave (Sine wave) 10 Hz -3.5 dBAK C E lever (FR SW) side F side R center Lever (FR SW)