Sanyo C14EA80 - Page 19

MAIN BOARD CIRCUIT SIDE
5. By using VR351, adjust voltage 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.
AGC 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.
FOCU S$ ADJUSTMENT
By using FOCUS VR, adjust focus control for well scanning
lines.
DETECTOR
ADJUSTMENT
DC 15V R352
AGC voltage 1C101-48 p
Output probe Tuner TR
(Side b)
Input probe TP-F
Tuning voltage Tuner TU
CIRCUIT ALIGNMENT
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SERVICE
CONTROL
ADJUSTMENT
VIF
ALIGNMENT
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B1.POWER SUPPLY ADJUSTMENT peas 0.002uF LT a |
1. Set VR351 to be mechanical center before pressing the V-SIZE ADJUSTMENT e 1000
main
switch.
1.
Tune
the
receiver
to
PAL
circular
pattern.
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b
Ganon
2.
Tune
the
receiver
to
PAL
circular
pattern.
2.
Adjust
V-size
by
using
VR431.
1kQ
|
3.
Set
brightness
and
contrast
controls
to
normal.
4.
Connect
digital
V-meter
to
R351.
Input
probe
Output
probe
Damping
R
OVERALL
WAVEFORM
R352
1C101-48 p
Tuner TR
(Side b)
TP-F
Tuner TU
SETTING
Band UB
GREY SCALE ADJUSTMENT pampng e res KV-1 & KV-2
- System SW |
B: [SCREEN VR ADJUSTMENT] Sweep ATT 25
*
1. Tune the receiver to black and white pattern.
: f By using L230, adjust "P" | By using Tuner converter
2. Set brightness control to display centre and contrast control
to be maximum amplitude. | coil and L101, make the
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to normal. 7.)
- 3. Set SW220 to "SERVICE" position. Made Loree
pet 4. Set VR601and VR611 to be mechanical center. epost
qe 5. Turn VR602, VR612 and VR622 fully counter-clockwise. C= 49+ 10%
co ee 6. Set screen VR for one colour to be just visible.
ss [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.
VIF
waveform
HIGH TA wid NFIRM
[HIGH VOLTAGE CONFIRM]
1. Tune the receiver to PAL circular pattern.
2. Set brightness and contrast controls to normal. MAIN BOARD
3. Connect digital V-meter to test point (+) “TP-H” and (-)
“TP-G”, and high voltage meter to CRT anode. S TP-D
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.
SERVICE
Q224
~ @...
[Olle
NORMAL L230
[H-WIDTH CONFIRM]
5. If H-width is too wide or narrow, connect or disconnect AJ1.
6. Reconfirm high voitage.
H-CENTER ADJUSTMENT
1. Tune the receiver to PAL circular pattern.
2. Adjust H-center by using VR401.
Overall waveform
adjustment
Tuner converter coil
& Tuner TR
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