Sanyo C14EA80D - Page 18

SERVICE CONTROL ADJUSTMENT
A
1. Set VR351 to be mechanical center before pressing the
main switch.
2. Tune the receiver to PAL circular pattern.
3. Set brightness and contrast controls to normal.
4. Connect digital V-meter to R351.
5. By using VR351, adjust voitage to 130 + 0.5 V.
TU-AFT ADJUSTMENT
1. Tune the receiver to the clearest station.
2. By using L230, adjust AFT to obtain the best picture.
A AD TMENT
NOTE: Do not attempt this adjustment with weak signal.
1. Tune the receiver to the clearest station.
2. Set AGC VR(VR120) in direction which causes snow noise
to appear, then in the opposite direction until snow noise
just disappears.
GREY SCALE ADJUSTMENT
(SCREEN VR ADJUSTMENT]
1. Tune the receiver to black and white pattern.
2. Set brightness control to display centre and contrast control
to normal.
3. Set SW220 to “SERVICE” position.
4. Set VR601and VR611 to be mechanical center.
5. Turn VR602, VR612 and VR622 fully counter-clockwise.
6. Set screen VR for one colour to be just visible.
[BIAS VR ADJUSTMENT]
7. By using VR602, VR612 or VR622, adjust line to be white.
8. Set SW220 to “NORMAL position.
[DRIVE VR ADJUSTMENT]
9. By using VR601 and VR611, adjust white balance.
! L DTH NEIRM
(HIGH VOLTAGE CONFIRM]
1. Tune the receiver to PAL circular pattern.
2. Set brightness and contrast controls to normal.
3. Connect digital V-meter to test point (+) “TP-H” and (-)
“TP-G", and high voltage meter to CRT anode.
4. Confirm high voltage to be 21.0 + 1 KV at beam current 0.7
+ 0.05, and less than 25.0 KV at 0 beam current.
(H-WIDTH CONFIRM]
5. If H-width is too wide or narrow, connect or disconnect AJ1.
6. Reconfirm high voltage.
1. Tune the receiver to PAL circular pattern.
2. Adjust H-center by using VR401.
:
CIRCUIT
ALIGNMENT
VIF ALIGNMENT
V-SIZE ADJUSTMENT
1. Tune the receiver to PAL circular pattern.
2. Adjust V-size by using VR431.
AD. NT
By using FOCUS VR, adjust focus controi for well scanning
lines.
DC 15V
AGC voltage
Output probe
Input probe
Tuning voltage
Band
Damping R
System SW
Sweep ATT
VIF waveform
MAIN BOARD
Detector adjustment
10kQ
Input probe
0.002uF iW
Pe a
75Q — 1002
. 1kQ |
Output probe Damping R
DETECTOR
ADJUSTMENT
1C351-1
1C101-48 p
Tuner TP
(Side b)
TP-F
Tuner TU
By using L230, adjust *P"
to be maximum amplitude.
adjustment
& Tuner TR
OVERALL
WAVEFORM
10351-1
1C101-48 p
Tuner TP
(Side b)
TP-F
Tuner TU
FREE
KV-1 & KV-2
B/G
30
By using Tuner converter
coil and L101, make the
marker positions
to P=35 + 10%
C=35 + 10%
Overall waveform
Tuner converter coil