Service manual

23
23-1
23-2
20F630
CU20F630
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
SUB-COLOR
V03 STEP RANGE 0-127
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, SUB-PICT, SUB-TINT US 10 CH HALF COLOR BAR PATTERN 120V R-AMP TR BASE (TP851) CONFIRM WITH OSCILLOSCOPE
1) SET THE V03 BUS DATA TO GET A WAVEFORM AS BELOW 2) THIS WAVEFORM SHOWS THAT THE 75% WHITE & RED PORTIONS
OF COLOR BAR BEAT AT THE SAME LEVEL
**PLEASE TAKE NOTE THAT SERVICE DATA F52 MUST SET TO +10
[CHECKING CONFIRMATION]
100% WHITE
WY RBMg
Cy G
SET THE USER CONTROL TO SHIPMENT POSITION. [VOLTAGE CONFIRMATION] CHECK THE VOLTAGE OF P603 PIN 3 AS SPECIFIED BELOW. [OPERATION CONFIRMATION] SUPPLY THE DC VOLTAGE TO P603 PIN 3 AND MAKE SURE THE PRO- TECTOR IS FUNCTIONED. HORIZONTAL OSCILATION STOP AND PICTURE DISAPPEAR. [RECOVER INFORMATION] PULL OUT THE AC CORD. [CAUTION] FROM THE RECOVER CONFIRMATION MENTIONED ABOVE, THE AC CODE MUST BE PULLED OUT AT LEAST 4 SECOND BEFORE PLUG- GING IN AGAIN.(IN ORDER TO MAKE SURE THE µ-COM HAS BEEN RESET.)
X-RAY PROTECTION OPERATING CONFIRMATION
– STEP RANGE –
–
AFTER ALL ADJUSTMENT FINISHED. US 4 CH LION HEAD (MONOSCOPE PATTERN) AC 120V, RF INPUT CONFIRMATION BY THE CRT
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
[VOLTAGE CONFIRMATION]
TP VOLTAGE OPERATION VOLTAGE
18.9± 1.1V DC 24.5V