Philips 13PT30L1 Service Manual page 58

Master Screen (VG2)/ White Balance Setup:
1. With the set OFF, rotate VG2 (located on the lower part of the flyback transformer) counter clockwise.
2. Use the Power Button (on the remote control or the local keyboard) to turn the set ON, without a signal, and
rotate VG2 clockwise until snow is visible.
3. Enter Service Alignment Mode (refer to Service Alignment Mode section).
4. Enter the Virtual Customer Menu by pressing the Menu button on the remote and set brightness and picture
to 31 and color to 0.
5. Apply an NTSC color bar signal to the antenna/cable input terminal and tune to the active channel.
6. Connect an oscilloscope, 20V per division and 10uSec time base, to pin 6 of the CRT Socket. Observe the
stairstep pattern while adjusting VG2.
Hint: Counter clockwise adjustment will compress bottom of stairstep pattern. Clockwise adjustment will
compress top of stairstep pattern.
7. Adjust VG2 midway between top and bottom compression.
8. Proceed to White-Tone Adjustments under White Tone sub-menu in the Service Alignment Mode section to
complete White Balance Setup.
Customer Service Mode (CSM)
1. The Customer Service Mode (CSM) is used to retrieve data on the TV operation settings and stored error
codes.
2. To enter the Customer Service Mode, press and hold the Mute button on the remote control and any key on
the local keyboard (except "Power") for more than 4 seconds. When the set is in Customer Service Mode,
the text "CSM" is displayed in the top right corner of the screen.
3. To use this system, the customer is instructed to enter CSM and read off the display that appears. This
information is useful to gain insights into failures before traveling to the customer's home.
4. This information can also be used to avoid nuisance trips to the home when the problem is an operational
error (example: Closed Caption is on or set is in Hospital Mode).
5. When entering CSM, all disruptive functions are turned off, and service unfriendly modes are ignored. While
CSM is active, no changes can be made in settings or functions. When CSM is exited, the TV returns to all
prior operational settings.
6. To exit CSM, press any key (on the remote control or local keyboard) except "Channel Up" or "Channel
Down."
To exit CSM and return the set to normal operation mode, press any key on the local keyboard or the remote
control except Channel Up, Channel Down, or Power.
To exit CSM and turn the set off, press the Power button on either the TV set or the remote control.
7. A sample CSM display is shown below.