Sony RCD-W1 Service Manual page 7

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 : C903 – 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.
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.
PC
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
at 100V A.C or 300V at 220V).
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.
RCD-W1
CD-R
test connector (PN201)
PS-232C cable (D-sub 9pin)
(straight type)
SW501
PC connection jig
W
D Set SW501 to "D" side
CN505 CNP501
BD-R board
PC connection jig
(J-2501-210-A)
RCD-W1
7