Safety Related Adjustment - Sony TRINITRON VAIO CDP-220AS Service Manual

CPD-220AS
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.
HV ADJ
HV Regulator
Circuit
HV Protector
Circuit
Beam Current
Protector Circuit
* 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
Check Condition
• Input voltage : 240.0 ± 2.0 V AC
• Input signal
• Beam control : CONT : 100 %, BRT : 40 %

SAFETY RELATED ADJUSTMENT

[
Part Replaced (
RV501
]
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
+0.00
V DC
–0.10
: Cross hatch at 64.0 kHz
(VESA 1024 x 768)
SECTION 3
• 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
• 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
• Beam control : CONT : 100 %, BRT : 40 %
– 14 –
: Cross hatch at 64.0 kHz
(VESA 1024 x 768)
: Cross hatch at 64.0 kHz