AV-28X37SUE AV-28X37HKE
AV-28X35HKE AV-28X37HIE
AV-28H35SUE AV-28H35BUE
AV-28X35HUE
(No.52106)1-19
3.5 ADJUSTMENTS PROCEDURE
3.5.1 CHECK ITEM
Item
Measuring
instrument
Test point
Adjustment part
Description
B1 POWER
SUPPLY
check
Signal
generator
DC
v
oltmeter
Remote
control unit
X connector
TP-91(B1)
TP-E( )
[POWER DEF
PWB]
[2.V/C]
1.RGB BLK
(1) Receive a any broadcast.
(2) Select the FULL mode.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 1. RGB BLK.
(5) Press the [fu ( )] key to find the cut off
screen (Black screen).
(6) Connect a DC voltmeter to TP-91(B1) and TP-E( ).
(7) Make sure that the voltage is DC139.9
±
2.0V.
(8) Press the [function - ( )] key to return to service
menu.
HIGH VOLTAGE
check
Signal
generator
HV voltmeter
Remote
control unit
CRT anode
Chassis GND
[2.V/C]
1.RGB BLK
(1) Receive a any broadcast.
(2) Select the FULL mode.
(3) Select 2. V/C from the SERVICE MENU.
(4) Select 1. RGB BLK.
(5) Press the [fu ( )] key to find the cut off
screen (Black screen).
(6) Connect a HV voltmeter to CRT ANODE and
chassis GND.
(7) Make sure that the voltage is DC 31.0kV (+1kV / -
1.5kV).
(8) Press the [function - ( )] key to return to service
menu.
IF VCO check
Remote
control unit
[1.IF]
1.VCO
• Under normal conditions, no adjustment is required.
• It must not adjust without broadcast signal.
(1) Select 1.IF from the SERVICE MENU.
(2) Then select 1.VCO from the 1.IF.
(3) Receive any broadcast.
(4) Check the arrow (<--) position between the ABOVE
REF. and BELOW REF.
1. VCO
2. ATT
i : EXIT
i : EXIT
IF SERVICE MENU
1-2 : SELECT
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
VCO(CW)
**** MHz
Do not move
