Sanyo CE21KF8R, Service Manual

Page: 13 / 30

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Service Mode Adjustments
Following adjustments should be carried out when the memory IC is replaced. How to enter the service mode and
adjust values, please refer to “ Entering to Service mode” on page 11.
NOTE: Do not attempt this adjustment with weak signal.
(1) Tune the receiver to most clearest (or strongest) VHF
station in your area. Set the brightness and contrast
controls to maximum. Set the colour control to
minimum.
(2) Select [RF AGC] in the service mode.
(3) Change value until the snow noise just disappears.
(4) Exit from service mode.
Item 01 [RF AGC] AGC
(1) Receive a monochrome circular pattern.
(2) Set the brightness and contrast to normal.
(3) Select [H-PHA] in the service mode.
(4) Change value to be optimum horizontal centre position.
(5) Exit from service mode.
Item 02 [H-PHA] HORIZONTAL CENTRE
(1) Receive a monochrome circular pattern.
(2) Set the lever of SW501 (Vertical Center SW) as the
position of a center.
(3) Set the brightness and contrast to maximum.
(4) Select [V-SIZ] in the service mode.
(5) Change value to be optimum vertical size.
(6) Exit from service mode.
Item 04 [V-SIZ] VERTICAL SIZE
Horizontal centre
Vertical size
c
Upper
Center
Bottom
d
e
a
b
Upper
Center
Bottom
(1) Receive a crosshatch pattern.
(2) Set the lever of SW501 (Vertical Center SW) as the
position of a center.
(3) Select a picture mode of NATURAL by pressing the
PICTURE MODE button.
(4) Select [V-SCO] in the service mode.
(5) Adjust Vertical S-letter Correction so that the difference
of “c”, “d” and “e” becomes less than 2 mm by pressing
the or - button.
(6) Confirm Vertical Linearity and adjust Vertical Center
then Vertical Size.
(7) Exit from service mode.
Item 05 [V-SCO] V-S CORRECTION
(1) Receive a crosshatch pattern.
(2) Set the lever of SW501 (Vertical Center SW) as the
position of a center.
(3) Select a picture mode of NATURAL by pressing the
PICTURE MODE button.
(4) Select [V-LIN] in the service mode.
(5) Adjust Vertical Linearity so that the difference of “a” and
“b” becomes less than 3mm by pressing or
- button.
(6) Exit from service mode.
Item 06 [V-LIN] VERTICAL LINEARITY
E
E
E
J507
R426
D642
Q462
D501
Q540
C461
PCC
D421
J505
SW501
JP463
Q461
Q461-H2
C524
J411
C521
IC501-H3
C540
R473
R471
R472
C462
R480
D462
C467
R464
R468
C470
D512
J503
R516
C468
R463
R465
D461
R466
R461
C463
C466
J502
Q461A
Q461-H1
R540
D465 R501
445
J501
R469 R467
J506
J630
JP140
J1003
D1032
J022
J019
C1401
C150
J2
Q261
R264
J1004
J
J112
JP1401
J113
J408
J409
J508
J239
J017
JP501
R872
JW34
R503
JP503
J10
R514
VR462
VR463
JWW1
R502
R478
JW31
JW32
J410
JW37
J509
JW40
H-SIZE
SW501
SM_21-C5GSH (Rus) 6/28/04 11:33 AM Page 13