Sanyo CE32WH3-F Service Manual page 14

ADJUSTMENTS
IMPOTANT NOTICE
Do not attempt to adjust the following service adjustments except requiring the readjustments in servicing
otherwise it may cause loss of performance and product safety.
POWER SUPPLY CONFIRMATION
1. Receive white raster pattern.
2. Set controls to maximum and set the screen mode to
"WIDE".
3. Connect digital voltmeter to D632-C and GND.
4. Confirm that voltage is 140±1Vdc.
IF VCO ADJUSTMENT
PAL BG VCO ADJUSTMENT
1. Apply 38.9MHz signal to IF terminal on the tuner.
2. Set system mode to "S-1".
3. Enter to the service mode and select mode
"REGULAR", item "REGULAR 1VC1".
4. Press the volume + or - key to set data value to be
"10".
SECAM L/L' VCO ADJUSTMENT
1. Apply 34.3MHz signal to IF terminal on the tuner.
2. Set system mode to "S-4".
3. Enter to the service mode and select mode
"REGULAR", item "REGULAR 2VC2".
4. Press the volume + or - key to set data value to be
"10".
RF-AGC ADJUSTMENT
1. Receive colour bar pattern with 63dBuV/75Ω
terminated signal gain.
2. Connect digital voltmeter to TP-AGC and GND.
3. Set system mode to "S-1".
4. Enter to the service mode and select mode
"REGULAR", item "REGULAR 3AGC".
5. Press the volume + or - key to adjust voltage to be
3.2Vdc.
F7YLV
VIDEO LEVEL ADJUSTMENT
1. Receive colour bar pattern.
2. Connect oscilloscope to C155 (R175 side) and GND.
3. Adjust amplitude "a" to be 1.0Vp-p by using VR181.
Y-OUT LEVEL ADJUSTMENT
1. Receive colour bar pattern.
2. Connect oscilloscope to C7064 and GND.
3. Set controls to maximum.
3. Adjust amplitude "a" to be 1.0±0.05Vp-p by using
VR7001.
SCAN PLL ADJUSTMENT
1. Receive colour bar pattern and set controls to
maximum.
2. Connect oscilloscope to test point "TP-1" on the Scan
converter board.
3. Adjust voltage to be 2.7±0.2Vdc by using T7201.
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