18
BASIC OPERATIONS OF SERVICE MENU
1. ITEMS IN THE SERVICE MENU
The service menu include the following items. The settings and adjustments are classified into these items.
Do not alter the values of unnecessary items.
SIGNAL BLOCK
: Adjustments of the contrast, brightness, chroma and phase.
WHITE BALANCE BLOCK
: Adjustments of the white balance.
DEFLECTION BLOCK
: Adjustments of the deflection circuitry.
CPU BLOCK
: Setting of the entire system by means of the control values of the microcomputer. (This block is usually not
adjusted in servicing. Do not touch it except for adjustment items CC41 and CE05 to CE19.)
DIAGNOSIS
: Display of the results of self diagnosis.
UPC1884 ADJ.
: Display of the status of UPC1884 which is the DEF processor IC. (Do not adjust this item because it is not
required for servicing.)
TA1276 ADJ.
: Display of the status of TA1276 which is the RGB processor IC. (Do not adjust this item because it is not
required for servicing.)
HOUR METER
: Display of the hour meter count.
UPDATE CPU PROGRAM
: Display of the software version.
INITIALIZE EEPROM
: Initialization of the user-setting menu. (Do not adjust this item because it is not required for servicing.)
2. BASIC OPERATIONS IN THE SERVICE MENU
(1) Entering the Service Menu
Use the front panel keys to display the Service Menu (Fig. 1).
1
While holding the
key, press the MENU key.
The “
” mark appears at the center of the screen (Fig. 2).
2
Before the “
” mark disappears (within 5 seconds after it ap-
pears), hold the
key and press the VOL- (
) key.
Warning message “Please don't touch” appears on the screen
(Fig. 3).
3
Before the warning message disappears (within 5 seconds af-
ter it appears), press the VOL+ (
) key.
The service menu items appears on the display (Fig. 4).
–
+
VOLUME
MENU
Please don't touch!
SIGNAL BLOCK
WHITE BALANCE BLOCK
DEFLECTION BLOCK
CPU BLOCK
DIAGNOSIS
UPC1884 ADJ.
TA1276 ADJ.
HOUR METER
EXIT:
MENU
SELECT:
ENTER: +
Fig. 1 FRONT PANEL KEYS
Fig. 2 WRNING MARK
Fig. 3 WARNING MESSAGE DISPLAY
Fig. 4 SERVICE MENU
Summary of Contents for BT-H1700P
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