Adjustment Instructions - Hitachi C21-TF641S Service Manual

ADJUSTMENT INSTRUCTIONS

HOW TO GO TO SERVICE MODE
1. How to go to adjustment mode no 001 ~ 022
Procedure
(1) Turn TV off by power switch on the TV set.
(2) Press " FUNCTION " button on the TV set and kept depress the button.
(3) Turn TV on by power switch on the TV set.
2. How to go to adjustment mode no 101 ~ 328
Procedure
(1) Set volume to be "0".
(2) Press
(3) Press "TV/VIDEO" button on the TV set, and kept depress the button.
(4) Press
(5) TV will show service table,then please cancel to keep depress the "TV/VIDEO" button.
Note : 1. Press the UP/DOWN cursor buttons
2. Adjust data by the left/right cursor buttons
3. Press "RECALL" buttons to restore the data.
+B ADJUSTMENT
PREPARATION
1 AC input voltage 230 + 5V(50Hz)
2 Turns on the set and set the brightness and contrast
to Max.(Signal : Philips Pattern)
3 After 30 sec heat-run, check & adjust the +B voltage
FREE RUN FREQUENCY ADJUSTMENT
PREPARATION
Receive a PAL-I monoscope signal on TV mode.
1
VIF-VCO FREE RUN FREQUENCY ADJUSTMENT
PREPARATION
Receive a PAL-I monoscope signal on TV mode.
1
button on remote control to go to standby mode.
button on remote control to go to operation mode.
to select adjustment mode no.
.
1 Adjust R954 to obtain +B voltage as below
+B voltage : TP902
GND
Select adjustment mode no. 1 and press "MENU" button
1
one time.
Select adjustment mode no. 2 and press "MENU" button
1
one time.
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PROCEDURES
: TP901
PROCEDURES
PROCEDURES