(No.YA466)1-19
4.8
ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
Item
Measuring
instrument
Test point
Adjustment part
Description
B1 VOLTAGE
DC voltmeter
Remote
control unit
CN00B
connector
1-pin:TP-B1
3-pin:TP-E
[MAIN PWB]
(1) Receive any broadcast.
(2) Connect a DC voltmeter to 1-pin and 5-pin of
CN00B
connector.
(3) Make sure that the voltage is
DC135V ±2.0V
.
HIGH VOLTAGE
HV voltmeter
Remote
control unit
CRT anode
Chassis GND
(1) Receive any broadcast.
(2) Connect the earth clip of HV voltmeter to chassis
GND.
(3) Connect the probe of HV voltmeter to CRT anode.
(4) Make sure that the voltage is
DC30.5kV ±1.5kV
.
NOTE:
• Remove the probe before removing the earth clip.
IF VCO
Remote
control unit
[1.IF]
1.VCO
• Under normal conditions, no adjustment is required.
• Confirmation adjustment.
(1) Select
1.IF
from the SERVICE MODE.
(2) Select
<1.VCO>
(3) Receive any broadcast.
(4) Check the
←
(Arrow) posspition between the ABOVE
REF. and BELOW REF.
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
VCO (CW)
.
MHz
DISPLAY : EXIT
Receiving frequency
YELLOW
1. VCO
2. DELAY POINT
IF SERVICE MENU
DISPLAY : EXIT
1 : SELECT
