AV-27F703
AV-27F713
AV-27F803
 ADJUSTMENTS
B1 POWER SUPPLY
Measuring
ItemTest pointAdjustment partDescription
instrument
Check ofDC Voltmeter B11. Receive the black-and-white signal. (color off)
B1 POWERConnector2. Connect the DC voltmeter toB1connector pin1(TP-91)
SUPPLY(pin1 & pin3)
and TP-E(#) (B1 connector pin3).
TP-91(pin1)3. Confirm that the voltage is DC134.5V?2V.
TP-E(#):(pin3)
ADJUSTMENT OF VCO
Measuring
ItemTest pointAdjustment partDescription
instrument
MAIN VCOSignal10:VCO MAIN" It must not adjust without signal
adjustmentgenerator1. Receive color bar signal.
CW TRANSF.(T111)2. Enter the SERVICE MENU mode.
[MAIN PWB]
3. Press the 2 key, and select the 10:VCO mode from the
SERVICE MENU.
4. Push the FUNCTION / key, and select MAIN.
5. Confirm that the color change from HIGH LEVEL to LOW
LEVEL by CW TRANSF T111 at MAIN PWB, and check the
SYNC : YES.
TUNER MAIN
HIGH LEVEL6. Adjust until REFERENCE LEVEL mark turns green.
REFERENCE LEVEL GREENAnd then confirm that the SYNC : YES again.
LOW LEVEL
7. Press the EXIT key to get out SERVICE MENU.
SYNC : YES
SUB VCOSignal10:VCO" It must not adjust without signal
adjustmentgenerator1. Receive color bar signal.
(AV-27F803 ONLY)
2. Enter the SERVICE MENU mode.
1. Press the FUNCTION (2) key, and select the 10:VCO mode
from the SERVICE MENU.
4. Push the left / right ( / ) key, and select SUB.
5. Confirm that the change from HIGH LEVEL to LOW LEVEL by
CW transformer T4111 at PIP PWB, and check the SYNC :
TUNER SUB
YES.
HIGH LEVEL
6. Adjust until REFERENCE LEVEL mark turns green.
REFERENCE LEVEL GREEN
LOW LEVELAnd then confirm that the SYNC : YES again.
7. Press the EXIT key to get out SERVICE MENU screen.
SYNC : YES
22No. 52005 |