SONY RCDW7V
Instrukcja Serwisowa

RCD-W7V

NOTE ON CHECKING POWER SUPPLY CIRCUIT
1. When check the primary part, you must remove the GND pin of the scope and soldering machine. Primary GND : C103 � terminal at power board. 2. When check the primary part, you must open the another GND(not used GND) of scope. (If another scope GND is connected to secondary GND or other system, input power line or system have some damage.) 3. When touch the primary part by hand in defected system, if you use the power line switch, remove the power cord and then check or touch. Because in general power switch is switching only one line. 4. When check the primary part, after remove power cord and dis charge the primary capacitor, and then check the system. In the normal state, the voltage of the capacitor is small (about 10V), but in the abnormal state is very high ( about 140V). When discharge the capacitor, use the wattage resistor(about 100 ohm). 5. In the narrow system, Until set repaired completely, insert the power cord at the moment repeatedly and then check the waveform. 6. In the wide system, when insert the power cord, check the wave form after about 3 second. Because the wide system is the soft start method.

BD-R BOARD CHECK AND ADJUSTING JIGS
In case of checking or adjusting the LD power of BD-R board, the PC connection jig (J-2501-210-A) and the test program are required. This test program is distributed with the service manual.

RCD-W7V BD-R board

CD-R test connector (PN105)

PC connection jig (J-2501-210-A) PS-232C cable (D-sub 9pin) (straight type)
SW501 W D

PC connection jig Set SW501 to �D� side
CNP501

CN505

PC

7