Normal Operation / Features; Power On; Power Off; Aging Mode - Sony CPD-G400 Training Manual

Normal Operation / Features

Power ON

Initial Conditions: No video input. 120Vac input. Cold start.
1. Press power ON switch.
2. Front panel indicator LED is green.
3. Degassing coil receives AC current, causing the picture tube's aper-
ture grill to vibrate (humming sound).
4. The AC surge current is about 6 AC amps.
5. Current drops down to 0.6 AC amps.
6. The following black lettered graphic appears at the center of the screen
with strips of the color indicted:
INFORMATION
NO INPUT SIGNAL
INPUT 1
WHITE
RED
GREEN
BLUE
Active Off Low Power Mode (no input)
1. Two minutes after pressing the power ON switch, the monitor auto-
matically enters the standby mode when there is no input signal de-
tected. The monitor shuts down and the graphic disappears into a
dark screen.
2. The front panel indicator LED changes from green to orange.
3. Activating any front panel user function will return the monitor to the
ON mode where the graphic will reappear. The front panel functions
are:
• Input switch (input 1 or 2)
• Menu control – Any direction (up, in, outward, left, right)
• Reset button
3
Note: During testing you may return from the Active Off Mode without an
input by pressing any front panel button. As the monitor powers up, it is
normal for the power supply's oscillator to run at one of two frequencies.
The oscillator may run at the lower oscillator frequency of 21kHz instead
of the full power mode of 65kHz. It will sense an increase in load and
switch automatically when necessary.

Power OFF

Initial conditions: Unit is in standby mode. No video input.
1. Press the power OFF button.
2. The orange LED goes dark after three seconds.

Aging Mode

This mode is commonly found in Sony monitors and warms up the CRT in
preparation for the technician to perform color temperature adjustments.
By pressing a series of front panel buttons (different for each model), this
mode can be activated. The CPU detects this button combination and
places a DC bias on the CRT cathodes to produce a white screen. The
procedure in the CPD-G400 is as follows:
1. Disconnect the video cable from the computer or shut off the com-
puter so there is no sync input the monitor.
2. Press the monitor switch in. A no video-input message will appear on
the screen when the CRT warms up.
3. Move the ball type control button to the left and hold it there for two
seconds. This must be done before the monitor goes into the Active
Off Low Power Mode (two minutes after power ON).
4. The entire screen will turn white and the power indicator will alter-
nately blink green and orange. This is the aging mode.
5. The monitor will exit from the aging mode if:
• The control button is moved to the right and held for two seconds.
• Input sync is detected (computer turned on).
• The input switch is changed.
• The power button is pressed again (off).