Read Sony CPD-G520P Service Manual online
CPD-G520P (E)
2-1
SECTION 2
SAFETY RELATED ADJUSTMENT
HV Regulator
Circuit Check
Circuit Check
HV Protector
Circuit Check
Circuit Check
When replacing or repairing the shown below table, the
following operational checks must be performed as a
safety precaution against X-rays emissions from the unit.
Part Replaced (
[)
RV901
HV ADJ
*
Confirm one minute after turning on the power.
a) HV Regulator Circuit Check
1) Turn the RV901 slowly, and adjustment so that high
voltage is in the specified range.
[Specification]: 27.00
±
0.05 kV
2) Check that the voltage of D912 cathode on the D
board is 17.0 V or more.
b) HV Protector Circuit Check
1) Using external DC Power Supply, apply the voltage
shown below between cathode of D912 and GND,
and check that the RASTER disappers.
[Specification]: 19.95 + 0.00/– 0.05 V
Part Replaced (
])
D Board C925, IC901, R901,
R902, R905, R924,
R925, R926, RV901,
T901 (FBT)
• Mounted D Board
R925, R926, RV901,
T901 (FBT)
• Mounted D Board
D Board C920, C923, D911,
D912, R903, R917,
R918, R919, R920,
R923, T901 (FBT)
• Mounted D Board
R918, R919, R920,
R923, T901 (FBT)
• Mounted D Board
N Board IC1001, RB1001
• Mounted N Board
Beam Current
Protector Circuit
Check
Protector Circuit
Check
Part Replaced (
])
D Board C930, D917, R921,
R932, R933, R935,
T901 (FBT)
• Mounted D Board
T901 (FBT)
• Mounted D Board
N Board IC1001, RB1001
• Mounted N Board
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