Important Notice - Sanyo CE32FWH1F-C Service Manual

SERVICE ADJUSTMENTS
[ADJUSTMENTS]
How to adjust the each service data, Please see "SERVICE ADJUSTMENT on page 12 for Entering the Service
mode , Selecting service item and Adjusting the service data value.

IMPORTANT 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.
Adjustment Tools
10kΩ
CH TRAP ADJUSTMENT
1. Apply 8.0Vdc to pin "C156 +" and GND.
2. Connect output probe to terminal "TUNER IF".
3. Connect input probe to pin "Q131-C".
4. Set the sweep attenator to 11dB.
5.
By using T131, adjust "A" to be minimum amplitude.
A = 40.4 MHz
IF VCO ADJUSTMENT
PAL BG VCO ADJUSTMENT
1. Apply 38.9MHz signal to IF terminal on the tuner.
2. Enter to the service mode and select mode
"REGULAR", item "REGULAR 1VC1".
3. Press the or
"10".
L' VCO ADJUSTMENT
1. Apply 34.3MHz signal to IF terminal on the tuner.
2. Enter to the service mode and select mode
"REGULAR", item "REGULAR 2VC2".
3. Press the or
"10".
RF-AGC ADJUSTMENT
1. Receive a colour bar pattern with 63dBuV/75Ω
terminated signal gain.
2. Connect digital voltmeter to TP-AGC and GND.
3. Enter to the service mode and select mode
"REGULAR", item "REGULAR 3AGC".
4. Press the or
3.2Vdc.
0.002µF
a
75Ω b
1kΩ
Output probe
A
button to set data value to be
button to set data value to be
button to adjust voltage to be
10KΩ
100Ω
1000pF
Input probe for CH trap alignment
VIDEO LEVEL ADJUSTMENT
1. Receive a colour bar pattern.
2. Connect oscilloscope to terminal "TPVIDEO" and
GND.
3. Adjust amplitude "a" to be 2.0Vp-p by using VR181.
Y-OUT LEVEL ADJUSTMENT
1. Receive a colour bar pattern.
2. Connect oscilloscope to terminal "TPYOUT" and GND.
3. Adjust amplitude "a" to be 1.0Vp-p by using VR7001.
SCAN Y LEVEL ADJUSTMENT
1. Receive a colour bar pattern.
2. Connect oscilloscope to C7383 and GND.
3. Adjust amplitude "a" to be 1.0Vp-p by using VR7351.
FOCUS ADJUSTMENT
By using FOCUS VR, adjust focus control for well defined
scanning lines.
14
1S188
0.002µF
330Ω
100KΩ
"a"
"a"
WB5-B chassis