Sanyo CE28CN8F-C User manual

Part No. SKSM0719 C5WYS JULY 2004
Colour Television
Service Manual
Model CE28CN8F-C
Service Ref. No. CE28CN8F-C-00
PRODUCT CODE: 111361018
ORIGINAL VERSION: Chassis No. EB8-A
Give complete "SERVICE REF. NO." for parts
order or servicing, it is shown on the rating sheet
on the cabinet back of the TV set.
Note
This TV receiver will not work properly in foreign
countries where the television transmission
system and power source differ from the design
specifications. Refer to the specifications for the
design specifications
CE28CN8F-C
Contents
Safety precautions/Specifications ..................................................................................................................2
Block diagrams ..............................................................................................................................................3
Cabinet Disassembly......................................................................................................................................4
Adjustment and Repair Procedures............................................................................................................5~9
CPU Functions ..............................................................................................................................................................................10~11
Component Locations ..................................................................................................................................12
IC Block Diagrams..................................................................................................................................13~15
Pin description of semiconductors................................................................................................................16
Part Description and reading of schematic diagram ....................................................................................17
Cabinet Parts List/TV Stand parts list ..........................................................................................................18
Electric Parts List....................................................................................................................................19~24
Please use Schematic Diagram SKP20442
inserted with this Service Manual.

-3- C5WYS
BLOCK DIAGRAM
This is a diagram for all models and therefore differs slightly from the actual block diagram.
IC601
TN6Q04
C609
D610
14v IC645
5v
P.F
2
4
1
25v
D671
7v
3v3
ON/OFF
UOC PIN 107
Q651
Q642
+14v
-14v
Q625
Q682
145v
Q641
Q675 St-BY UOC
PIN 106
AC
A101
TUNER
X122
X121
5v30v
5
A1901 RC RECEIVER
PF
Q866
IC001 AUDIO AMPLIFIER
SPEAKER
SP901
SP902
KEY SW
IC801 MEMORY
1V8_1 Q202 Q201
1V8_2 Q203
Q204
TO UOC PINS
93 & 96
TO UOC PINS
3,100,117,118,124
UOC
Q1001 Q1002
SC_1 B-IN
SC_1 G-IN
SC_1 R-IN
SC1 FB IN
K1001
SCART 1
SC_1 VIDEO OUT
SCART 1 AUDIO L/R IN
SCART 1 AUDIO L/R OUT
SC_1 VIDEO IN
Q1003
Q1004
SCART 2 AUDIO L/R IN
SCART 2 AUDIO L/R OUT
K1101
AV3 AUDIO L/R & VIDEO IN
145V
Q439
Q431 Q432
L461
L462
Q462
Q461
HORIZONTAL
SCAN COIL
D441
Q402 Q403
ON/OFF CONTROL
CPU PIN 106
200v
To CRT
Q401
T451 FLYBACK
CRT Heater
IC7 01
SCREEN & FOCUS
H.V
R OUT
GOUT
BOUT
IK
PICTURE TUBE
VERTICAL
SCAN COIL
V-OUTPUT
LA78045
IC501
X201
I2C BUS CONTROL
14 10
9
106
107 11
9
22 23 2
128
48
75 72 71 70
51 53 54
84 85 86
6
58 62 63
SC_2 FB -IN
SC_2 G -IN
SC_2 B- IN
SC_2 R-IN
K1002
SCART 2
SC_2 VIDEO OUT
SC_2 VIDEO IN
49 50
43
55 34 35
36 37
108 109
120
31
127 60 61 97
29 30
80 79 78 77
24
25 IF IN
SIF IN
SW601
T611
CONVERTER
IC666
3v3 St-By
Outline

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OPTION SETTING
[After replacing the Memory IC (IC801)]
The memory IC, IC801, stores the option data of TV set and service adjustments data for each circuit, therefore,
when the memory IC is replaced, it should be programmed to the following settings and “SERVICE ADJUSTMENT”
on pages 6 to 9.
To enter to the Option Mode
+ Press and hold the F/OK button on the remote control and P▼button on the front panel of the TV. The option
window will appear on the screen.
To set the Option Mode
+ Highlight the desired option item by using the P▲or P▼ button .
+ To switch the option mode, use the Volume - (LEFT) or Volume + (RIGHT) button.
+ The data which is set in the option mode is stored into the memory IC automatically.
The following table shows the available option items and default setting mode.
Exit from the Service Mode
+ Press the MENU button.
Option Mode Mode Description & Note
SORT MODE SORTING or Tuning mode, default “SORTING”
TUNING
P & P ON or OFF Plug & Play mode, default “ON”
WEL. TEXT ON or OFF Display message when first set up, default “ON”
AUTO VOLUME ON or OFF Auto volume default “OFF”
SURROUND ON or OFF Surround sound default “ON”
VIRT SUB WOOFER ON or OFF Virtual Sub Woofer default “ON”
COUNTRY UK or IRE or TV system, default “B/G, D/K, I, L/L’”
BG/DK / I / LL’
WIDE ON or OFF Wide mode, default “OFF”
AV3 ON or OFF Front AV disable, default “ON”
TEXT NO SIGNAL ON or OFF Disables Text when no signal, default “ON”
AFC ON or OFF Auto Frequency Control default “OFF”
SORT MODE SORTING
P&P ON
WEL.TEXT ON
AUTOVOLUME OFF
SURROUND ON
VIRT SUBWOOFER ON
COUNTRY B/G, D/K, I, L/L'
WIDE ON
AV3 ON
TEXT NO SIGNAL ON
AFC OFF
OPTION
ADJUST : EXIT : RECALL
OPTION MODE FOR CE28CN8F-C-00
i
/

-6-
C5WYS
SERVICE ADJUSTMENTS
After replacing the Memory IC (IC801)]
The memory IC, IC801, stores the service adjustments data for each circuit, therefore, when the memory IC is
replaced, it should be programmed by using “OPTION SETTING” on previous page and the following adjustments.
ADJUSTABLE SERVICE ADJUSTMENT
Service Item Number. Symbol 1 Symbol 2 Frequency Wide Mode
13 A01 Track. mode 50Hz Full Track. Mode(HCO)
14 A02 Vert. Zoom 50Hz Full Vertical zoom
15 A03 Vert. Slope 50Hz Full Vertical slope
16 A04 Vert. Shift 50Hz Full Vertical shift
17 A05 Vert. Ampl. 50Hz Full Vertical amplitude
18 A06 S-Corr. 50Hz Full S-correction
19 A07 V.Lin.Ctrl. 50Hz Full V.Lin.Ctrl.
20 A08 V.Linearity 50Hz Full V.Linearity
21 A09 EW Width 50Hz Full EW width
22 A10 Hor. Shift 50Hz Full Horizontal shift
23 A11 EW Parabola 50Hz Full EW parabola/width
24 A12 Trapezium 50Hz Full EW trapezium
25 A13 UC Parabola 50Hz Full EW upper corner parabola
26 A14 LC Parabola 50Hz Full EW lower corner parabola
27 A15 Hor. Bow 50Hz Full Horizontal bow
28 A16 Parallel 50Hz Full Horizontal parallelogram
29 A17 Vert. Scroll 50Hz Full Vertical Scroll
30 A18 H BLK SW 50Hz Full RGB blanking mode
31 A19 H BLK L 50Hz Full Timing of wide blanking front(WBF)
32 A20 H BLK R 50Hz Full Timing of wide blanking rear(WBR)
33 A21 OSVE 50Hz Full Black current measuring lines in overscan
34 A22 EVB 50Hz Full Extended vertical blanking
35 B02 Vert. Zoom 50Hz Natural / or 4:3 squeeze mode Vertical zoom
36 B09 EW Width 50Hz Natural / or 4:3 squeeze mode EW width
37 B10 Hor.Shift 50Hz Natural / or 4:3 squeeze mode Horizontal shift
38 B11 EW Parabola 50Hz Natural / or 4:3 squeeze mode EW parabola/width
39 B12 Trapezium 50Hz Natural / or 4:3 squeeze mode EW trapezium
40 B13 UC Parabola 50Hz Natural / or 4:3 squeeze mode EW upper corner parabola
41 B14 LC Parabola 50Hz Natural / or 4:3 squeeze mode EW lower corner parabola
42 B15 Hor.Bow 50Hz Natural / or 4:3 squeeze mode Horizontal bow
43 B16 Parallel 50Hz Natural / or 4:3 squeeze mode Horizontal parallelogram
44 B17 Vert. Scroll 50Hz Natural / or 4:3 squeeze mode Vertical Scroll
Explanation
Item No. OSD Description
7 VG2 Screen adjustment
151 WPR - N R - Drive adjustment
152 WPG - N G - Drive adjustment
304 AGC Take Over AGC adjustment
314 TXT - H - POS OSD Positioning adustment
IMPORTANT NOTICE
Do not attempt to adjust service adjustments not listed above otherwise it may cause loss of performance and product safety.
GEOMETRY SERVICE DATA

-7- C5WYS
To enter to the Service Mode
+ Press and hold the GREEN button on the remote control and then press the P▼button on the cabinet.
To select the service item and change data value
+ To select the adjustment item, use the P▲or P▼button.
+ To change the service data, use the Volume -(LEFT) or Volume + (RIGHT) button.
+ The data which is set in the service mode is stored into the memory IC automatically.
SERVICE MODE
SERVICE SERVICE SOFTWARE
ITEM ITEM VERSION
NUMBER DESCRIPTION
Exit from the Service Mode
+ Press the MENU button or turn off the TV set by using the Mains switch.
INITIALISATION OF MEMORY IC
To initialise the memory IC (IC801), press and hold the NORMAL button on the remote control, then press
the P▼button on the front panel of the TV set. The tv set will switch into standby mode. Turn the Mains switch Off
and On, then switch on from standby. The initialisation is now completed.
When initialised the memory IC and all of the setting data (option data and service adjustment data) stored in the IC
are reset to the default value. It is necessary to set the option settings and readjust the service adjustments listed in
this manual and to re-tune all the channels.
SERVICE
000 EB8A 3_52