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To Check Purity:
Press the Recall Button on the Remote Control when in Serviceman Mode (red “CHK” is displayed) to enter the
Purity Field Check Mode.
Press Recall again to select desired field.
NORMAL
SCREEN
WHITE
SCREEN
RED
SCREEN
GREEN
SCREEN
BLUE
SCREEN
Figure 21. Purity Check Field Mode.
Helpful Hints
Entering Serviceman Mode (Back-Open Method)
1.
While the Receiver is ON or Puggled and operating in Normal Mode,
momentarily short test point FA1 (TP8) to Cold Ground (
) FA2
(TP3) A-Board.
The Receiver enters the Aging Mode
.
Yellow letters “CHK” appear in the upper left corner of the CRT.
(The Volume Up/Down will adjust rapidly).
2.
Simultaneously press the Action and the Volume Up buttons on the
Receiver Control Panel.
The Receiver enters the Serviceman Mode.
The letter in “CHK” turn red.
(The Volume Up/Down will adjust normally).
(All customer controls are set to nominal level).
IMPORTANT NOTE:
Always Exit the Serviceman
Mode Following Adjustments.
