AV-27320
AV-27330
AV-27S33
 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 toB1connector1pin (TP-91)
SUPPLYand TP-E(#) (B1 connector3pin).
TP-91
TP-E(#)3. Confirm that the voltage is DC134V?2V.
ADJUSTMENT OF VCO
Measuring
ItemTest pointAdjustment partDescription
instrument
MAIN VCOSignal10.VCO MAIN" It must not adjust without signal
adjustmentgenerator1. Select a receivable broadcast.
CW TRANSF.(T111)
2. Push the FUNCTION 1/ 2 key, and select the 10.VCO
[MAIN PWB]
mode from the SERVICE MENU.
3. Push the FUNCTION / key, and select MAIN.
4. Confirm that the color change from bHIGH LEVELc to bLOW
LEVELc by CW TRANSF T111 at MAIN PWB, and check the
bSYNC : YESc.
5. Adjust until bREFFERENCE LEVELc mark turns green.
And then confirm that the bSYNC : YESc again.
TUNER MAIN
HIGH LEVEL
REFERENCE LEVEL GREEN
LOW LEVEL
SYNC NO
ADJUSTMENT OF RF AGC
Measuring
ItemTest pointAdjustment partDescription
instrument
RF. AGCS45 AGC ADJ1. Receive a black and white signal (color off).
adjustment2. Select S45 AGC ADJ of the V/C MODE.
3. Press the MUTING key and turn off color.
4. With the FUNCTION key to get the noise in the screen
picture (zero side of setting value).
5. Press the FUNCTION key several times and step when
noise disappears from the screen ( at that time, not to increase
VariableInitial setting
No.Setting itemthe value too much).
rangevalue
6. Change to other channels and make sure that there Is no
S45AGC ADJ0^12780irregularity.
7. Press the MUTING key and get color out.
No. 5193721 |
ACEC
