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To Check Purity:
Press Recall on the Remote Control when in Service
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
GRN.
SCREEN
BLUE
SCREEN
Figure 33. Purity Check Field Mode.
Helpful Hints
Entering Service Mode (Back-Open Method)
1.
While the Receiver is on and operating in Normal Mode, momentarily
short test point FA1 (TP8) to Cold Ground (
) FA2 (TP3) A-Board.
T
HE
R
ECEIVER
ENTERS
THE
A
GING
M
ODE
Yellow letters “CHK” appear in the upper left corner of the CRT.
(The Volume Up/Down will adjust rapidly).
2.
Simultaneously press Action and Volume Up on the Receiver
Control Panel.
T
HE
R
ECEIVER
ENTERS
THE
S
ERVICE
M
ODE
The letter in “CHK” turn red.
(The Volume Up/Down will adjust normally).
(All customer controls are set to nominal level).
NOTE
Always Exit the Service Mode
Following Adjustments.
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