Sony TRINITRON BVM-D9H5U User Manual

4-2
BVM-D9H1U/D9H5U/D9H1E/D9H5E/D9H1A/D9H5A
+B (12 V) Voltage Check
When the following parts (the parts to which the mark is
attached on the schematic diagram) are replaced, be sure to
perform the following checks.
G board ....... IC666, IC603, IC690, PH601, T602,
T604
1. Connect a digital voltmeter between pin-1 and pin-2
(GND) of CN1602 on the D board.
2. Turn on the main power.
3. Connect the 1080/60i monoscope signal (see note) to
input connector.
Note: 1125 (1080) monoscope signal
4. Push the BRIGHTNESS and CONTRAST buttons to
their MANUAL positions (to turn the green LEDs on
the buttons.)
5. Set the BRIGHTNESS and CONTRAST buttons to
their mechanical center positions.
6. Check that the following DC voltage appears.
13.0 ± 1.0 V
7. Turn off the main power.
8. Disconnect the digital voltmeter.
1
2
3
4
5
6
7
ABCD
Digital
voltmeter
CN1602
High Voltage Regulator Check
When the following parts (the parts to which the mark is
attached on the schematic diagram) are replaced, be sure to
perform the following checks.
P board ....... IC502, IC508, R540, R541, R543, R544,
R549, R550, R555, R599
1. Turn off the main power.
2. Connect an electrostatic voltmeter to the anode cap of
CRT tube.
..
..
. Electrostatic voltmeter: It must have already been
calibrated to have the input impedance of 2 x 10
9
Ω
or more.
3. Turn on the main power.
4. Connect the 1080/60i monoscope signal (see note) to
input connector.
Note: HD 1125 signal
5. Push the BRIGHTNESS and CONTRAST buttons to
their MANUAL positions (to turn the green LEDs on
the buttons.)
6. Set the BRIGHTNESS and CONTRAST buttons to
their mechanical center positions.
7. Check that the following high voltage appears.
15.5 ± 0.4 kV
8. Turn off the main power.
9. Disconnect the electrostatic voltmeter.
[Connection]
D board (A SIDE)

Sony TRINITRON BVM-D9H5U Specifications

General

Brand	Sony
Model	TRINITRON BVM-D9H5U
Category	Monitor
Language	English