Sanyo CE14SA4R Service manual

SERVICE MANUAL Colour Television
Specifications
Power Source . . . . . . . . . AC110-240V, 50Hz/60Hz.
Colour System . . . . . . . . PAL/SECAM/NTSC4.43/NTSC/PAL-60Hz
Television System . . . . . . B/G, D/K, K’, I, M/M
Channel Coverage . . . . . VHF: E2-E12, A2-A13, R1-R12, J1-J12, K1-K9
UHF: 21-69, A14-A69, J13-J62 CATV:S1-S41, X, Y, Z, Z+1, Z+2
Aerial Input Impedance . . 75 Ext.Terminals
Video inputs: Phono jack 2 (1Vp - p, 75Ω) Audio inputs: Phono jack 2 (436mVrms, more than 40KΩ) Video monitor outputs: Phono jack 1(1Vp - p, 75Ω)
Audio monitor outputs: Phono jack 1(436mVrms, less than 600Ω)
Sound Output (RMS) . . . . 2 W
Speaker . . . . . . . . . . . . . . Diameter 8cm 1 pc.
Dimensions . . . . . . . . . . . 364.5 (W) 361.7 (H) 383.3 (D)mm
Weight . . . . . . . . . . . . . . . approx. 8.6 Kg
Specifications subject to change without notice.
Original Ver sion Chassis Series: AC5-G
C5SRR
FILE NO.
Model No. CE14SA4
CE14SA4R
(Russia)
Give complete “SERVICE REF. NO.” for parts order or ser vicing. It is shown on the rating plate at the cabinet back of the unit.
This T.V. receiver will not work properly in foreign countries where the television transmission system and power source dif­fer from the design specifications.Refer to the specification table.
0
7
14
85236
9
P
P
JXMYA
-/--
PP
TV/AV
A B
CH SCAN
TIMER
MENU
PIC MODE
SWAP
BASS
SURROUND
Service Ref. No. CE14SA4-00
CE14SA4R-00
Product Code: 111361943
P
TV/AV
-
+
VIDEO AUDIO
MENU
Software Model CE14SA4: AC5-A1
Model CE14SA4R: AC5-A (RU)
REFERENCE NO.SM5110639

Contents

-2-
Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Chassis Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
IC Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service Adjustments with replacing Memory IC (IC802) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-11
Service Mode Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13
Service Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Special Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Purity and Convergence Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Cabinet Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Chassis Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-24

Safety Notice

SAFETY PRECAUTIONS
1: An isolation transformer should be connected in the
power line between the receiver and the AC line when a service is performed on the primar y of the converter transformer of the set.
2: Comply with all caution and safety-related notes pro-
vided on the cabinet back, inside the cabinet, on the chassis or the picture tube.
3: When replacing a chassis in the cabinet, always be
certain that all the protective devices are installed properly, such as, control knobs, adjustment covers or shields, barriers, isolation resistor-capacitor net­works etc.. Before returning any television to the customer, the service technician must be sure that it is completely safe to operate without danger of electrical shock.
X-RADIATION PRECAUTION
The primary source of X-RADIATION in television receiver is the picture tube.The picture tube is specially con­structed to limit X-RADIATION emissions.For continued X-RADIATION protection, the replacement tube must be the same type as the original including suffix letter.Excessive high voltage may produce potentially hazardous X
- RADIATION. To avoid such hazards, the high v oltage m ust be maintained within specified limit.Refer to this ser­vice manual, high voltage adjustment for specific high voltage limit. If high voltage exceeds specified limits, take necessary corrective action.Carefully follow the instructions for + B1 volt po wer supply adjustment, and high volt­age check to maintain the high voltage within the specified limits.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of a receiver. Components indicated by mark in the parts list and the schematic diagram designate components in which safety can be of special significance. It is par ticularly recommended that only par ts designated on the par ts list in this manual be used for component replacement designated by mark . No deviations from resistance wattage or voltage ratings may be made for replacement items designated by mark .
-3-
Chassis Block Diagrams
(Main Signal Processing Circuit )
Front
key
A1901A
RC
PRE-AMP.
D1910
LED
5V-2
6
7
ANT
VIDEO IN
AUDIO-IN
AUDIO MONITOR OUT
FRONT
AV IN
REAR
AV IN
VIDEO IN
IC802
MEMORY
6
5
4
3
SCL
SDA
Key in
R/C in
31
29
Stand by
Mute
Protect
27
10
8
AFT
BLK
B
G
R
36V
9
11
IF OUT
CPU
1
VIF
RF AGC
A101
TUNER
X161
SAW Filter
15V
40
SELECTED VIDEO OUT
1
51
42
AUDIO-OUT
Ext.AUDIO-IN
Ext.VIDEO-IN
RF AGC
AFC
ABL
28
13
4
IF in
IF in
6
AFT
SIF
out
SIF
in
IF
V
CC
VIDEO
VERT
V
CC
RGB
VCC
HOR.
VCC
5V-2
10
52
54
8
43
5
18 25
H-VCC
9V
9V-1
8
5VRC
14
15
16
17
R
G
B
BLK
46
44
35
34
VIDEO-OUT
INT. VIDEO IN
R-Y IN
9V-1
B-Y IN
R-OUT
G-OUT
B-OUT
H-OUT
V-OUT
19
20
21
27
23
IC201
IF/VIDEO/
CHROMA
MUTE
AUDIO-IN
AUDIO
OUT
IC001
AUDIO AMP.
(MONO)
IC281
SECAM
6
7
Low B
5V-2
TELETEXT UNIT
TEXT: R
TEXT: G
TEXT: B
TEXT:
BLK
180V
VIDEO IN
14
SECAM KILLER
1
5
IC501
VERT./DEF.
SWITCH
VR631
130V
Reg.
Reg.
24V
15V
9V
5VRC
Reg.
Reg.
24V
Protect
T431
H-DRIVE
TRANS.
Q432
H-OUT
25V
130V
B
G
R
9V
H
V
L902
DY
AFC
ABL
T471
FBT
Q901
CRT
Heater
HV
180V
Heater
Low B
36V
H-VCC
9V-1
5V-2
Protect
POWER SUPPLY CIRCUIT
Protect
4/5
IC801
12
28
19
20
21
22
SP901
7
5
3
9
REAR
MONITOR
OUT
VIDEO MONITOR OUT
AUDIO-IN
11/12
2
Q431
H-DRIVE
13
15
IC2001
TELETEXT DECODER
8
9
10
12
16/17
1
CRT UNIT
T611
CONVERTER
TRANS.
2
AUDIO MONITOR OUT
IIC Bus
IIC Bus
IIC Bus
IIC Bus
1 / 2
Model CE14SA4 & CE14SA4R
Teletext decoder is no equipped.
-4-
Chassis Block Diagrams
(System Control)
12
KEY SWITCH IN
KEY
SWITCH
SCL
2
1
31
SDA
POWER ON/OFF
PHOTO COUPLE
(ON=HIGH, OFF=LOW)
IC201
IF/VIDEO / CHROMA/DEF.
IC801
CPU
QXXABV864
22
19
20
211817
27
34
7
6
32
28
OSD BLK OUT(Active=High)
OSD RED OUT(Active=High)
OSD GREEN OUT(Active=High)
OSD BLUE OUT(Active=High)
DEFLECTION
CIRCUIT
HORIZ. SYNC IN (ACTIVE=LOW)
VERT. SYNC IN (ACTIVE=LOW)
POWER PROTECT IN
(POWER ERROR=LOW)
POWER CIRCUIT
etc.
SCL
SDA
IC802
MEMORY
OSC
X801
32.768KHz
CPU OSC OUT
CPU OSC IN
LED
ON-TIMER LED OUT
(ON TIMER ON=Low)
RC SIGNAL IN
(ACTIVE=HIGH)
RC PRE-AMP.
IC001
AUDIO AMP.
(MONO)
A101
F/S TUNER
AFT SIGNAL INPUT
10
RESET INPUT (ACTIVE=LOW)
13
MUTE OUTPUT
(MUTE ON=HIGH)
29
56
3
IC801
CPU
Model
CE14SA4:
QXXAVC042P
Model
CE14SA4R:
QXXAVC320P
-5-

IC Block Diagrams

IC201 < IF/Video/Chroma/Def. > LA76818A
1
DC
VOL
SW
FM
DET
2
3
4
56
IF
AGC
RF
AGC
VIF
7
8
9
10
IF
VCC 5V
11
12
13
BUS
PEAKING
CORING
BLACK
STRETCH
SYNC
SEP
14
15
ABL
DC
REST
CLAMP
OSD
CONTRAST
BRIGHT
16
17
18
19 20
CONTRAST
BRIGHT
RGB
MATRIX
OSD
SW
DRIVE/OUT-OFF
VCC
21
22
23
FSC/
SYNC SW
24
25
26 27
VER
RAMP
HOR
VCC
H
VCC
VER
C/D
HOR
OUT
PHASE
SHIFTER
AFC2
AFC1
VER
SEP
HOR
C/D
1/256
COLOR
CLAMP
LPF
ALC
+
SW
CLAMP
DEMO
PAL
SW
ACC
BPF
ON/OFF
DELAY
LINE
SW
TRAP
AFT
VIDEO
DET
TRAP
LIM
AMP
BPF
SPLL
BPF
VIDEO
AMP
IF
IDENT
VIDEO
SW
APC1
TINT
VXO
DDS
APC2
DC ADS.
CLAMP
VCO
1H DELAY
HOR
VCO
FBP
2829
30
31
32
1H
VCC
33
34
353637
38
39
40
41
42
CLMP
43
4445
CLMP
V/C VCC
5V
46
47
48
4950
A2C
PLL
51
525354
Audio Output
FM Output/Selected Audio Output
PIF AGC
RF AGC Output
PIF Input1
PIF Input 2
IF Ground
IF Vcc
FM Filter
AFT Output
Bus Data
Bus Clock
ABL
Red Input
Green Input
Blue Input
Fast Blanking Input
RGB Vcc
Red Output
Green Output
Blue Output
fsc output or C Sync output
Vertical Output
Ramp ALC Filter
Horizontal/BUS Vcc
Horizontal Output
Horizontal AFC Filter
Flyback Pulse Input
VCO IREF
Clock (4MHz) Outupt
CCD Vcc
CCD Filter
CCD/Horizontal Ground
SECAM B-Y Input (Cb Input)
SECAM R-Y Input (Cr Input)
Chroma APC2 Filter
Clamp Filter
4.43 MHz Crystal
Chroma APC1 Filter
Selected Video Output
Video/Vertical/BUS Ground
External Video Input(Y-IN)
Video/Vertical Vcc
Internal Video Input (S-C IN)
Black Level Detector
Video Output
VCO Filter
VCO Coil 2
VCO Coil 1
APC Filter
Ext. Audio Input
SIF Output
SIF APC Filter
SIF Input
IC Block Diagrams
-6-
IC201 <IF System Block Diagram> LA76818A
11
12
BUS
Interface
SAW
5
6
4
8
7
PIF
In1
PIF
In2
IF In
9V
30K
RF AGC
Out
120K
IF VCC
IF
GND
VIF AMP
VIF 1
VIF 2
VIF 3
IF AGC
Drive
RF
AGC
2ndIF
AGC
RF AGC
Delay
6bit
IF AGC
Def
1bit
+
-
(6 Vcc)/7
To
BUS
3
0.022u
PIF
AGC
IF
AGC
Data
Clock
APC
Det
+π/4
-π/4
Snd
Det
Amp
52
SIF.Out
Sound
Trap
Video
Det
Buzz
Canceller
50
APC
Filter
330
0.47u
+
PLL Pull-in SW
To
BUS
Lock
Det
Video.Level
3bit
Amp
54
10p
SIF.In
Sound
BPF
VCO.Coil
VCO
COIL1
VCO
COIL2
48
49
VIF
VCO
Chroma
Counter
B/N
INV
IF
Ident
OSC
C/D
Amp
SIF. Sys
2bit
pre-
scaller
SIF
VCO
500K
BPF
SIF
APC
Filter
1K
0.01u
1000p
53
LIM
AMP
FM
Det
FM.Level
5bit
Chroma
C/D
APC
Det
500K
Det
To
BUS
Chroma
VCO
VIF
Counter
Reset
Pulse
VCO
Ident
VIF.Sys
2bit
Phase
Detector
A.MUTE
1bit
VOLUME
D/A
VOLUME
Filter
A.SW
1bit
Input
Select
VOLUME
(ATT)
-
+
-
+
2.5V
Amp
FM Gain
1bit
Deem-TC
1bit
De-
emph
FM Mute
1 bit
2
9
46
51
1
A.Fil.Def
1bit
VOLUME
7bit
47
VCO
Alignment
AFT
10
AFT
Vcc
100K
100K
0.1u
VCO
Filter
+
0.47u
Audio.out
+
Audio in
10u
Video
Out
FM
Filter
+
1u
FM
Out
0.01u
+
to BUS Line
+
-7-
IC Block Diagrams
IC501 < Ver tical Output > LA78040/LA78040N
Thermal
Protection
-
+
AMP
Pump
Up
1
INVERTING
INPUT
2
Vcc
3
PUMP UP
OUT
4
GND
5
Ver. OUTPUT
6
OUTPUT
ST A GE Vcc
7
NON INV.
INPUT
IC001 < Audio AMP.> LA4266
12
34
5
6
7
8
9
10
NC NC
Filter PRE
GND
IN2
300
30k
NF2
OUT2
Power
GND
VCC NC

Service Information

This TV set has a built-in power supply protection circuit. It is provided to protect the TV set in case of a power supply circuit malfunctions.When something abnormality occurs during TV reception, the TV set goes to the stand-by mode.
When an abnormality occurs during TV reception, it causes pin 27 of the CPU to go continually Low for about one second.The CPU detects that this has occurred and outputs the signal from pin 31 to switch off the power supply lines.
Releasing the protective circuit and restoring power supply
To release the protective circuit and restore power supply, turn the power to the TV set OFF and then ON again via either the main power switch or the ON-OFF button on the remote control.This will work only if the power supply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot be restored and the circuit will have to be repaired.
Protection Circuit
10
9
Pulse
DET
Pulse
I/F
Clamp
VCO
SW2
11
Filter
PLL DET
12
13
System
SW1
LIM
KILLER
Bell/EQU
Filter
SW3
1415
ACC
Bell/EQU
Adj
16
1
2
3
ID-KIL
ID
4
5
F0 Adj
6
7
SW/ALC
8
F0-Fil Kil-Fil
4.43DC ID-Fil 4M-DC
R-Y Out
B-Y Out GND
4MHz InSC-In
4.43MHz In
AV/SECAMKil-Out
Video In
VccEQU-Adj
IC281 <SECAM Decoder> LA7642N
-8-

Service Adjustments with Replacing Memory IC (IC802)

Note: The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each
circuit.When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain the best performance. The necessary ser vice adjustments are carried out by using the RC handset. Please set up the TV set with following steps [1] to [2].
[1] Initializing Procedure
1. Put a new memory IC.
2. Turn on the TV set.
3. Press and hold the TV/AV Selector button on the TV set for more than 2 seconds.The following picture appears on
the screen.
4. Press the PROGRAMME UP on the TV set while the above On-Screen Display is still on the screen.The following
picture appears on the screen.
This completes the initialization of memory IC. Following shows the initialized contents of memory data by this procedure.
- Plug & Play : No executed
- Inhibit Data : Cancelled
- Ch Skip Data : Cancelled
- Sound Volume Data : 10/63 steps.
- V olume Lock : OFF
- Tuning Lock : OFF
- Music Mode : OFF
- AV Start : OFF
- Colour System : AUTO
1
CLR
TV/AV Selector
CH
TV/AV
-
+
MENU
PROGRAMME UP
[2] Required Service Adjustments
Readjust the following service adjustments.
Adjustments Service Mode No. & Item
RF AGC Item 01, RF AGC Horizontal centre Item 02, H-PHA Vertical size Item 04, V-SIZ Vertical-S correction Item 05, V-SCO Vertical linearity Item 06, V-LIN Gray scale Item 14-17, 19-21
Further adjustment please refer to page 12 and 13.
TV/AV
MENU
-
+
CH
+ 18 hidden pages