Sony TRINITRON VAIO CDP-220AS, Руководство по обслуживанию, Страница: 14 / 42

CPD-220AS
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SECTION 3
SAFETY RELATED ADJUSTMENT
Part Replaced (
[
)
RV501 HV ADJ
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.
•
Beam Current Protector Check
Using an external DC Power Supply, applying voltage of
7.00 ± 0.05 V between
!]
pin of FBT (T501) and GND,
and confirm that the vlotage of both ends C519 is with in
the Voltage range shown below.
• Standard voltage : Less than 3.26 V DC
Check Condition
• Input voltage : 240.0 V AC
• Input signal : Cross hatch at 64.0 kHz
(VESA 1024 x 768)
• Beam control : CONT : 100 %, BRT : 40 %
•
B+ Voltage Check
Standard voltage : 150.0 ± 2.0 V DC
Check Condition
• Input voltage : 240.0 ± 2.0 V AC
Note : Use NF power supply or make sure that
distortion factor is 3% or less.
• Input signal : Cross hatch at 64.0 kHz
• Beam control : CONT : 100 %, BRT : 40 %
HV Regulator
Circuit
HV Protector
Circuit
Beam Current
Protector Circuit
Part Replaced (
]
)
D board IC801, C509, C542,
C548, C802, C814,
C815, R538, R539,
R540, R541, R807,
R822, R823, R824,
RV501, T501 (FBT)
D board IC801, IC904, D511,
D515, C515, C516,
C517, C910, R532,
R533, R534, R535,
R996, T501 (FBT)
• Mounted D board
D board IC901, D596, C519,
C528, C549, C904,
R542, R543, R544,
R545, R939
• Mounted D board
* Confirm one minute later turning on the power.
•
HV Protector Circuit Check
Confirm that the HV protector circuit works and CRT
screen disappearing when apply the voltage as shown
below between Cathode of D511 on D board and GND
using an external DC Power Supply.
• Standard voltage : 35.00 V DC
Check Condition
• Input voltage : 240.0 ± 2.0 V AC
• Input signal : Cross hatch at 64.0 kHz
(VESA 1024 x 768)
• Beam control : CONT : 100 %, BRT : 40 %
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