JVC InteriArt AV-2986ME Service Manual page 19

4.8 ADJUSTMENT PROCEDURE
4.8.1 CHECK ITEM
Measuring
Item
instrument
B1 VOLTAGE DC voltmeter
Remote
control unit
HIGH VOLTAGE HV voltmeter
Remote
control unit
IF VCO Remote
control unit
IF SERVICE MENU
1. VCO
2. DELAY POINT
1 : SELECT DISPLAY : EXIT
Test point Adjustment part
CN00X connector
1-pin:TP-B1
5-pin:TP-E
[MAIN PWB]
CRT anode
Chassis GND
[1.IF]
1.VCO
Receiving frequency
VCO (CW) . MHz
TOO HIGH
ABOVE REFERENCE
JUST REFERENCE
BELOW REFERENCE
TOO LOW
DISPLAY : EXIT
YELLOW
Description
(1) Receive any broadcast.
(2) Connect a DC voltmeter to 1-pin and 5-pin of
connector.
(3) Make sure that the voltage is DC134.5V ±2.0V.
(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 DC31.5kV +1kV/-1.5kV.
NOTE:
• Remove the probe before removing the earth clip.
• 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.
CN00X
(No.YA447)1-19