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To Check purity:
When receiver is in service mode (red “CHK” is displayed), place a jumper in the AG connector between the
terminals (shorting FB signal to ground). Press the RECALL button on the remote control to enter the white purity
field check mode. Remove the jumper from the AG connector and press RECALL repeatedly to toggle the receiver
into the red/green/blue purity field check modes.
Note: if jumper is not removed, colors will be displayed at high luminosity.
In aging mode (factory mode, yellow “CHK” is displayed), place a jumper in the AG connector between the
terminals. Press RECALL on the remote control to enter the purity field check mode.
Other adjustment
Default level
(without FM)
Default
level
(with FM)
X00
AFCT
60
83
X01
AFCB
29
44
X02
AFCC
42
64
X03
CLOCK
128
128
CH
CH
TO B ITEMS
PW
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.
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 service mode.
The letter in “CHK” turn red.
(The VOLUME UP/DOWN will adjust normally).
(All customer controls are set to nominal level).
Press RECALL repeatedly
to display the fields.
NORMAL
SCREEN
WHITE
SCREEN
RED
SCREEN
GREEN
SCREEN
BLUE
SCREEN
JUMPER IN AG
CONNECTOR
RECALL
REMOVE
JUMPER FROM
AG CONNECTOR
RECALL
Figure 14. Purity check field mode.
Note:
Only applicable settings for
the receiver serviced will be
available.
IMPORTANT
Always exit the service mode
following adjustments.
Summary of Contents for CT2022HE - 20" HOTEL/MOTEL TV
Page 49: ... 49 Todos los Modelos All Models Diagrama Impreso Tarjeta A A Board Layout ...
Page 64: ... 64 NOTES ...
Page 65: ... 65 NOTES ...
