Sanyo FC3G2 Training Manual

REFERENCE NO

COLOUR TELEVISION
TRAINING MANUAL

FILE NO.

Chassis Series FC3G2

CIRCUIT DESCRIPTION
BLOCK DIAGRAM OF ICs
TROUBLE SHOOTING

XXXXXX

.

1

Training Manual FC3G2 Chassis

Table of Contents

Part 1 Chassis Description .....................................................................................3

1. Chassis Summary ....................................................................................................... 3

2. CPU (System Control)................................................................................................. 4

2-1 A-D Key Identification Circuit. ..................................................................................... 8

2-2 Memory Option .........................................................................................................10

2-3 Power / stand-by circuit. ............................................................................................ 13

2-4 Protection circuit........................................................................................................13

2-5 AFT............................................................................................................................14

2-6 Horizontal/Vertical pulse input................................................................................... 18

2-7 Service mode ............................................................................................................ 19

3. IF /Video/Chroma/Deflection ....................................................................................22

3-1 IF stage......................................................................................................................22

3-2 Video/Chroma stage..................................................................................................22

3-3 Deflection stage.........................................................................................................22

4. Audio Output..............................................................................................................23

5. Vertical........................................................................................................................ 24

6. Horizontal .................................................................................................................. 24

7. Power Consumption Saving Circuit. .......................................................................25

Part 2 Block Diagram of ICs

1. LA76818A (IF/VIDEO/CHROMA/DEFLECTION)....................................................... 28

2. LA78040N (VERTICAL OUTPUT).............................................................................. 30

3. AN17820B (AUDIO OUTPUT).................................................................................... 30

4. LA7642NM (SECAM DECODER)............................................................................... 31

5. 24LC16B/P (IC MEMORY) ......................................................................................... 31

Part 3 Trouble shooting Chart

Trouble Shooting Chart Startpoint symptom: Dead ..............................................33

Trouble Shooting Chart Starpoint symptom: No picture-no sound ....................... 36

Trouble Shooting Chart Starpoint symptom: No picture-sound OK ...................... 38

Trouble Shooting Chart Starpoint symptom: No sound-picture OK ......................39

Trouble Shooting Chart Starpoint symptom: No color & color NG........................40

Trouble Shooting Chart Startpoint symptom: No vertical deflection ..................... 41

Trouble Shooting Chart Startpoint symptom: No on-screen display..................... 42

Short – Open Test Report ............................................................................................... 43

.................................................................................28

.............................................................................32

2

Training Manual FC3G2 Chassis

Part 1 Chassis Description

1. Chassis Summary

The following figure shows a basic block diagram of the FC3G2 chassis. This
chassis is constructed by the folowing ICs :

AN17820B, IC001, for the audio output circuit
LA76818A, IC201, for the IF, video, chroma de-modulation and deflection circuit
LA7642NM-TLM-E, IC281, for the SECAM decoder circuit.
NJW1142M, IC3701, for audio processor
LA78041, IC501, for the vertical deflection output circuit
LC863448W-52F1-TLM, IC801, for the CPU (system control unit) of FC3G2
AT24C16A-10PI-2.7, IC802, for the control memory IC.
MM1188XS & TC4053BF-TP1, IC1401 & IC 1501, for video selector.

A1901A

RECEIVER

D1910

LED

FRONT

CONTROL

KEYS

SP902

SP901

REAR

MONITOR

TERMINAL

REAR

INPUT

TERMINAL

FRONT

INPUT

TERMINAL

RC

SW1901 ~
SW1906

S-VIDEO IN (FROM S-TERMINAL)

R-OUT

L-OUT

V

L

OUT

R

V

AV1

L

R

V

AV2

L

R

S-TERMINAL

RC-IN

ON-TIMER

POWER

KEY-IN

IC001

AUDIO AMP.

8

12

2

R

6

L

VIDEO MONITOR OUT

AUDIO MONITOR OUT(LEFT)

AUDIO MONITOR OUT(RIGHT)

AV1 L-IN

AV1 R-IN

AV2 L-IN

AV2 R-IN

IC1401
VIDEO

SELECTOR

9

AV1 VIDEO IN

AV2 VIDEO IN

1

C-IN

6

+

Y-IN

7

3

AV2/S-INPUT

28

32

31

IC801

CPU

12

11

5

26

2

29

CONTROL/

SURROUND

3

28

4

AV OUT

8

AV1/AV2

(FROM CPU PIN-25)

C-IN
Y-IN

IC3701

(L-TV-L)1/30

AUDIO

3

4

19

20

21

1/2

24

26

10

21

13/14

SDA/SCL

(FROM CPU)

SDA

5

SCL

6

OSD R-OUT

OSD G-OUT

OSD B-OUT

SDA/SCL

TV/AV OUT

AV1/AV2 OUT

L-OUT

R-OUT

TV-AUDIO

S-INPUT

IC802

EEPROM

OUT (TV)

VIDEO-IN
Y-IN

R-IN

G-IN

B-IN

VIDEO

AV,Y IN

AV IN

TV IN

TV IN

AV-IN

Y-IN

A101

TUNER

SDA/SCL

IC201
IF/VIDEO/
CHROMA

11/12

5/6

14

15

2

1

5

3

13

12

19

16

20

21

23

46

27

42

TV

1

AUDIO

OUT

44

INT.VIDEO IN

(C-IN)

VIDEO MONITOR OUT

IC1501

VIDEO SELECTOR

11

9

10

IF IN

R-OUT

G-OUT

B-OUT

VERT.OUT

HORIZ.OUT

MONITOR

15

OUT

TV/AV OUT

4

Y-OUT

AV-OUT

14

Y-OUT

TV/AV (FROM CPU PIN-24)

X161

SAW

FILTER

Q431

H-DRIVE

CRT UNIT

1

T431

H-DRIVE

TRANS.

IC701
TRIPLE VIDEO
OUTPUT AMP.

R

1

9

G

2

8

B

3

7

IC501

VERT./DEF.

Q432

H-OUT

PCC

CIRCUIT

Q461-Q462

140V

24V

11V

9V

R

G

B

HEATER

POWER SUPPLY CIRCUIT

5

36V

9V

5V

T471
FBT

FBT

HORIZ. DEF.

VERT. DEF.

MAIN SOUND AMP.

IC201, AUDIO CTL.

CPU, EEPROM

FOCUS

SCREEN

TUNER

L902

CRT

HV

DY

HV

Figure of FC3G2 block diagram

3

Training Manual FC3G2 Chassis

2. CPU (System Control)

The following firgure shows a block diagram of the CPU peripheral circuit. CPU that

use for FC3G2 is AC5G2 CPU.

TERMINAL ASSIGNMENT (AC5G2 CPU)

LC863448W-52F1-TLM (ROM:48Kbytes)

BUS SDAÅÆ 1 P10/SDA0 * P03 36 Å Status input(factory)

V/C IC (Low:factory mode)

BUS SCL Å 2 P11/SCLK0 P02 35 Æ ACK output(factory)

(Low:factory mode)

IIC SDA ÅÆ 3 P12/SDA1 * P01 34 Æ BASS output & Woofer Output

EEPROM

IIC SCL Å 4 P13/SCLK1 P00 33 Æ VIF-M output

(High:NTSC,Low:other)

Vss(GND) Å 5 Vss P17 32 Æ ON timer LED on/off output

(Low:Timer on)

CPU OSC input Æ 6 XT1 P16/PWM3 31 Æ Power on/off output

(X’tal 32.768KHz) (High:on)

CPU OSC output Æ 7 XT2 P15/PWM2 30 Æ Volume PWM output

VDD(+5V) Æ 8 VDD P14/PWM1 29 Æ Sound Mute output

(High:Mute ON)

SECAM Killer Input Æ 9 P04/AN4 P73/INT3 28 Å remote control signal input

AFT signal input Æ 10 P05/AN5 P72/INT2 27 Å Power failure input

S-Video input (Low: S-in) Æ 11 P06/AN6 * P71/INT1 26 Æ TV/AV1/AV2/AV3

option output

panel key input Æ 12 P07/AN7 P70/INT0 25 Æ 50/60 output (Low:60Hz)

(PAL:50Hz, NTSC:60Hz)

RESET input Æ 13 RESET P32 24 Æ TV/AV1/AV2/AV3

option output

Filter for PLL Å 14 FILT P31 23 Æ L/R or L/L

(Connect to ground through CR)

CV input(no use=open) Æ 15 CVIN BLNK 22 Æ OSD Blanking signal output

Bilingual output Å 16 P30 B 21 Æ OSD Blue signal output

(Low:S-1,High:S-2)

V-sync signal input Æ 17 VS G 20 Æ OSD Green signal output

H-sync signal input Æ 18 HS R 19 Æ OSD Red signal output

NOTE : * N-ch.open drain output (Vout max.+5V)

4

Training Manual FC3G2 Chassis

The following table shows pin description of CPU.

Port Description Table

PIN Port

Name
1 SDA0 IIC DATA I/O Nch-OD No Hz BUS IC
2 SCL0 IIC CLOCK O Nch-OD No Hz BUS IC
3 SDA1 BUS DATA I/O Nch-OD No Hz EEPROM
4 SCL1 BUS CLOCK O Nch-OD No Hz EEPROM
5 VSS GND - -
6 XT1 X’tal input I - - 32.768KHz
7 XT2 X’tal output O - -
8 VDD +5V I - -
9 AN4 SECAM Killer input I Nch-OD No - High: SECAM

10 AN5 AFT IN I - No - AFT signal
11 AN6 S-Terminal input I Nch-OD No - Low: S-In
12 AN7 Panel keys input I - No - Panel keys
13 RES RESET I - - Reset:Low
14 FILT FILTER for PLL O - -
15 CVIN CV input I - - (Composite Video)
16 P30 Bilingual output O - yes -
17 VS V-sync signal input I - - Active Low
18 HS H-sync signal input I - - Active Low
19 R OSD Red output O C-MOS L Active High
20 G OSD Green output O C-MOS L Active High
21 B OSD Blue output O C-MOS L Active High
22 BLNK OSD Blanking output O C-MOS L Active High
23 P31 L/R or L/L output O C-MOS Hz Low:L/R
24 P32 TV/AV123 output O C-MOS yes Hz Option TV/AV1/AV2/AV3
25 P70 50/60Hz output O C-MOS No Hz Low:60Hz
26 P71 TV/AV123 output O C-MOS No Hz Option TV/AV1/AV2/AV3
27 P72 Power failure input I Nch-OD No Hz Low:fail
28 P73 Remotecontrol signal I Nch-OD No Hz Active High
29 P14 Sound Mute output O C-MOS No Hz High:Mute on
30 PWM2 Volume PWM output O C-MOS No Hz
31 P16 Power on/off output O C-MOS No Hz High:Power on
32 P17 On timer LED output O C-MOS No Hz Low:timer on
33 P00 VIF-M O C-MOS No Hz High:NTSC
34 P01 Bass expander I/O Nch-OD No Hz High:BASS on
35 P02 ACK O C-MOS No Hz Factory:Low
36 P03 Status input I Nch-OD No Hz Factory:Low

Use

I/O

Output
Structure

Input
p-up R

Reset

Notes

Note : Hz = High impedance

5

Training Manual FC3G2 Chassis

≪CPU Specification outline≫

This tuning system is equipped with the F/S tuning system for AC5G2 chassis. It has the
following specification.

(1) Monaural, Simple AV Stereo & AV stereo Function



(2) Maximum 256 Positions. Optional 100 or 256 Position (E

PROM : 16k bit for 256

Pos)

① The direct tuning function can be work by pressing “[0]~[9] key” and “[-/--] key”
② The sequential tuning function can be work by pressing [POS -] and [POS +]

key

③ The alternate tuning function can be work by [Alt] key

(3) PRESET function [Automatic Tuning/Semi-Auto Tuning/Manual Tuning]
Plug & Play function

(4) Channel Swap function & Channel Skip function

(5) Bilingual system

(6) Option system

A. Memory options

① Color system selection : Five kinds
② Sif system selection : Six kinds
③ AV input option : AV only or AV1/AV2 or AV1/AV2/AV3
④ BASS EXPANDER selection : with or without
⑤ SURROUND selection : with or without

B. Special function (Dealer) options

① Tuning Lock : on or off
② Volume Lock : on or off
③ AV start : on or off
④ Music mode : on or off

(7) Digital AFT (Auto Fine Tuning) function

(8) Front controls

◦ [Volume Up] / [Volume Down]
◦ [Programme Up] / [Programme Down]
◦ [TV/AV] Selector

(9) OSD is a multi-color display (the R/G/B output).

(10) OFF timer function（30/60/90/120 minutes）

(11) ON timer function (10 minutes ~ 24 hours)

6

Training Manual FC3G2 Chassis

(12) Auto shut off timer function (10 minute)

(13) FACTORY KEY(R/C DATA code “80h”~ “DFh”)

(14) Service mode (Adjustment of bus data : one chip and audio IC etc.)

(15) PWR Error Detection Function

2

(16) I

C bus correspondence (One chip : LA76818)

(17) EEPROM (8k bit for 100 position, 16k bit for 256 position)

(18) GAME (Air Tennis)

(19) Six Language OSD
① English
② Thai
③ Arabic
④ Russian
⑤ French
⑥ Bahasa Indonesia

(20) White Tone user adjustable

7

Training Manual FC3G2 Chassis

2-1 A-D Key Identification Circuit.

The key identification circuit used in this chassis uses a switched resistive ladder
network in a A-D conversion circuit to generate and send a voltage to the CPU when a
key pressed. The CPU uses this voltage to determine which key was pressed. This
resistive circuit eliminates the need for encoder/decoder devices, simplifying design
and adding to the reliability of the TV.
The table shows the voltage input to CPU pin 12, when a given key pressed.

Front Control Key Input

1) Action
Front panel SW is decied by the input voltage of A/D port (12pin).

2) Circuit

* S-terminal-less model key port 12PIN

5V

K5

K6

K4

K3

K2

K1

R12K

R5.6K

R3.9K

R2.2K

R1.8K

R1.0K

R10K

* S-terminal model key port (12PIN)

K4

K3

K5

K6

K2

K1

R27K

R12K

R5.5K

R3.9K

R2.2K

R1.8K

CPU 12 PIN
KEY SW INPUT

5V

R1.0K

R10K

CPU 12 PIN
KEY SW INPUT

8

Training Manual FC3G2 Chassis

* Key Table

Key VOL. Range(Vcc ratio) (V)

ΣR

FUNCTION

K6

K5
K4
K3
K2
K1
OFF 2
OFF 1

109/128Vcc ≦ K6 ＜ 127/128Vcc 4.26～ Vcc
93/128Vcc ≦ K5 ＜ 109/128Vcc 3.63～4.26

77/128Vcc ≦ K4 ＜ 93/128Vcc 3.01～3.63
61/128Vcc ≦ K3 ＜ 77/128Vcc 2.38～3.01
45/128Vcc ≦ K2 ＜ 61/128Vcc 1.76～2.38
29/128Vcc ≦ K1 ＜ 45/128Vcc 1.13～1.76
13/128Vcc ≦ OFF＜ 29/128Vcc 0.51～1.13
OFF ＜ 13/128Vcc ＜0.51

1.0K TV/AV

2.8K MENU

5.0K VOLUME -

8.9K VOLUME +

14.5K POSITION -

26.5K POSITION +

53.5K OFF (S-Available)

OPEN OFF (S-N/A)

* Mechanism SW is used for K1-7.

3. Action
* The Key scan will be performed every 20 msec. It judges whether the key was
pressed or not .
* When the Key signal is match within two consecutive time at intervals of 20msec ,
the key is decided.
* The Key scan priority is K6 -> K1.
* The high priority key has pushed, other keys cannot operate

.

4. S-input Option

* The “KEY OFF” voltage distinguishes availability of S-Terminal.
* The “KEY OFF” voltage range is divided into two kinds.

1. When KEY OFF voltage is less than 0.51V, it is decide as an S-terminal-less
model.

2. When KEY OFF voltage is from 0.51 to 1.13V, it is decide as S-terminal model.

<The option selection method >

* Judgment is always (20 ms) performed. (agrement with two consecutive time
* This option is decided only in KEY OFF. An option does not change when

K1 ～ K6 was inputted.

□Bus data of LA76818

VIDEO

SW

OFF 1

(S term less)

OFF 2

(S term)

Address TV AV TV AV

14H DAO 0 1 1 1

9

Training Manual FC3G2 Chassis

2-2 Memory Option

This chassis uses the option function to determine several different specifications of the
TV set. The CPU determines the specification of TV by setting the data of memory
option.
Following table shows the option function of the CPU.

The SERVICE MODE NO From 83 to 96 is EEPROM MEMORY OPTION.

《SERVICE MODE NO 83》

* ”STEREO” OR “MONO” OPTION

Bit OPTION

0 MONO
1 Simple AV Stereo

2,3 AV Stereo

※ AV STEREO : Control by Audio IC (NJW1142)

Simple AV : Control By CPU PWM port

MONO : Control by Volume ATT register of One chip IC.

《SERVICE MODE NO 84》

* VOLUME TABLE 1, 2 SWITCHING

Bit VOL TABLE

1 VOLUME TABLE2
0 VOLUME TABLE1

※ Refer to “volume.doc”.

《SERVICE MODE NO 85》

* MPP FUNCTION option

Bit

1 MPP ON
0 MPP OFF

* M.P.P. function memorize

VOLUME/BRIGHT/CONTRAST/SHARPNESS/TINT for every channel

(1~30 POS).
* Refer to 121Multi_PP_Level.DOC

《SERVICE MODE NO 86》

* TUNER option

Bit

1 Matsushita Tuner
0 ALPS Tuner

10

Training Manual FC3G2 Chassis

《SERVICE MODE NO 87》

* AV1, AV2, AV3 Option

Bit

0
1

2-3

TV→AV→TV
TV→AV1→AV2→TV
TV→AV1→AV2→AV3→TV

《SERVICE MODE NO 91》
《Description》
* A color system option is changed by a setup in Service Mode No. 91 OPT COL.
* A color system option is shown below. There are five kinds of color systems.
* COLOR SYSTEM OPTIONS Tabel

SVS
data

0,1 NO SYSTEM (No Display) PAL only same as the TV MODE.

2 VMT SYSTEM (No Display) PAL + NTSC only
3 CHINA,

4 3 SYSTEM

5,6,7 MULTI

OPTION TV AV

AUTO→PAL→NTSC4.43→NTSC

AUTO→PAL→NTSC4.43→NTSC

INDONESIA

AUTO→PAL→SECAM→NTSC4.43
AUTO→PAL→SECAM→NTSC4.43→NTSC

SYSTEM

same as the TV MODE.

same as the TV MODE.
same as the TV MODE.

《The option selection method》
* An option is changed by Service Mode NO. 91 OPT COL.
* The Option check will be carry out on RESET START.
* A judgment is performed only once after RESET START.

《SERVICE MODE NO 92》
《Description》
* A SIF system option is changed by Service Mode.
* A SIF system option is shown below. There are six kinds of SIF systems.
* The bilingual operation differs from the other SIF system option

* SIF SYSTEM OPTIONS

SVS

Data

OPTION BG (5.5M) D/K (6.5M) I (6.0M) M (4.5M)

0,1,7 NO SYSTEM (BG<5.5>) No display

2 BILINGUAL SYSTEM

3 SYSTEM A
4 SYSTEM B
5 SYSTEM C

6 SYSTEM D

－－－ －－－ ○(S-1) ○(S-2)

○(S-1) ○(S-3) ○(S-2) ○(S-4)
○(S-1) －－－ －－－ ○(S-2)
○(S-1) ○(S-2) －－－ －－－

○(S-1) ○(S-2)

－－－ －－－ －－－

○(S-3)

※Bilingual specification is displayed as S-1 and S-2. The other modes, each SIF

system name is displayed.

11

Training Manual FC3G2 Chassis

《The option selection method》
* An option is changed by Service Mode Data No.92 OPT SIF
* The voltage is read in a RESET START after operation.
* This judgment operation carry out only a RESET START.

《SERVICE MODE NO 93》

* BASS EXPANDER FUNCTION option

Bit Display

0 No Display
1 “BASS”
2 “BASS EXPANDER”
3 “WOOFER”

* If Bass Exp Option is ‘0’ on MONO and Simple AV mode then there will be No AUDIO

Menu on MAIN Menu

* This function is available only when using Audio Control IC.
* In AV Stereo Mode While BASS EXPANDER ON, AUDIO IC of Bass/Treble DATA is

set as : Bass : +10 dB, Treble : +6 dB

* In MONO & Simple AV Stereo Mode if BASS EXPANDER ON, Pin 34 will be “High”

《SERVICE MODE NO 94》

* SURROUND option

Bit

1 Surround
0 No Surround

《SERVICE MODE NO 95》

* SUB - BASS/TREBLE adjustment of Audio Control IC (NJW1142)

Bit

0 BASS TREBLE Gain –3 db
1 BASS TREBLE Gain 0 db

2,3

BASS TREBLE Gain ＋3 db

* This function available only when using Audio Control IC.

《SERVICE MODE NO 96》

* AGC setting Audio Control IC (NJW1142)

Bit

0 AGC OFF
1 AGC ON Level= 600 Mv
2 AGC ON Level= 500 mV
3 AGC ON Level= 300 mV

* This function available only when using Audio Control IC

12

Training Manual FC3G2 Chassis

2-3 Power On/ Stand-by circuit.

Power on / stand-by
The power on/stand-by signal is output from pin 31 of the CPU.
When the stand-by mode is selected the voltage of pin 31 changes from Hi(5V) to
Low(0V) to turn off Q681and Q652. Q652 turning off causes Q653 and
Q654 to turn off. +24V supply for vertical and horizontal output circuit, +9V supply
for IF/VIDEO/Chroma circuit and +5V for tuner circuit are all cut off, resulting in the
TV set going into the stand-by mode.
When the TV is switched back into the power on mode, Q681 and Q652 are turned
on and the relevant voltage are supplied back to each circuit.

Q681

TO HEATER PROTECT
& HOLDDOWN CIRCUIT

TO VERTICAL
DEFL. CIRCUIT
(FOR PROTECTION)

IC681

TO CPU

TO IC201, IC281
AUDIO PROCESSOR,
AV SWITCH & CRT UNIT

TO VIDEO PROCESSOR,

Q652

TO HOR & VER,
DEFLECTION CIRCUIT

TUNER & DEFLECTION

TO AUDIO AMP. IC

TO TUNER AND
HOR DEFL. CIRCUIT

Fig. of Power On/Stand by Circuit

2-4 Protection circuit

This chassis employs two kinds of protection circuit, one controlled by software through
the CPU and the other by hardware.

. Protection circuit (software)
The protection circuit is provided to disable the operation of the TV set in case of a
circuit malfunction. When an abnormality occurs during TV reception it causes pin 31 of
the CPU to go continually Low (less then 0.8V) for about one second. The CPU detects
that circuit malfunction has occurred and cut off the signal output to Q681.

. Protection circuit (hardware)
When a power failure is detected by diodes D655, D690 and D468, this protection circuit
operates causing the power oscillation to stop. If one of above diode is turned on, the
voltage of Q661-emitter decreases, and it turns on completely. Photo-coupler D610 is
driven by this and generates a current which drives Q625 on. As a result, the operation
of the power oscillation circuit is stopped. Under normal circumstances these parts,
D610, Q661, D661, R661, VR661, R662 are operating as the error detection and
regulation circuit for +130V power supply.

13

Training Manual FC3G2 Chassis

AT3

Q690

AH

R694

5.6K

C691

35EM47

1

4

X

4

5

6

X

7

1

2

2400030

3

23

14

15

12

16

13

17

L652

BA178M05T:
MC78M05CT:
UPC78M05AHF:
L78M05CV

C657
1000KK470
(CRD:NH)

L653

J

FE301-1L43:
RU4YXLF-L1

X

L654

J

X

J

D653

C658
1000KK470
(CRD:NH)

YG901C2-LB

R646

J

D654

D691

AA

D692

EU1

C656

1000KK

470(CRD:NH)

D652
RN1Z

IC681

123

10EM470

R658
X

C643
25EM

1000T

C654
25EM
3300

C655

1000KK680

(CRD:NH)

L651

J

D651

RU3AM

160EM
220XJ

R693
1/16GJ
10KC

R653

1FJ5.6

C652
35EM

470T

5VRC

C681

R654
15K

X

X

C651

R661

DJ100K

VR651

R3D6222NJ:

R3D7222NJ

R652
33K

JP653

1/16GZ0C

Q653

X

11V

AUDIO

C653

PM1

JP631

DJ10K

R691
1/16GJ
47KC

R692

1/16GJ
20KC

R645

R655

R659

X

J

R662

1/16GJ

3.9KC

X

Q661
AH

EM2.2
CT

JP652

X

2SB1565E

R657
DJ3.9K

R668

2SJ12

R669
2SJ

12

D659

X

TP-130

X

JP633

X

D661
MTZJ6.2C:
RD6.2EB3:
DZXLBZA6.2C

C690

R690
1/16GJ
47KC

Q652

1SJ270

MTZJ10B:

RD10EB2:

DZXLBZA10B

R663
150K

24V

R656

D664

16EM220LBWA

R665
DJ12K

D690

1SS355

AD

Q693

Q654
2SD1913

(QRA:RRA)

C664

16EM220:

B1

130V

R664

1SJ27K

C639

X

PROTECT

R697
1/16GJ
47KC

9V

C665

16EM470

Q651

R695
DJ6.8K

R696

1/16GJ

4.7KC

C693

16EM47

Q662

AC

D655

AA

AD

R651

1K

Q681

AE

R682
1/16GJ
560KC

D693

AA

D662

MTZJ

6.8A:
DZXLB
ZA6.8A

R681
22K

R672

12K

R660

11V

X

L-ST
H-ON

R666
1/16GJ
22KC

R667

1/16GJ
10KC

Q663

R671
22K

AH

D671

AA

C663
EM0.22

R673
1/16GJ
560KC

2-5 AFT

* Basic operation of tuning
（Common operation : Direct tuning / Sequential tuning / Alternate tuning）
(1) The tuned-in position is memorized to E2PROM as a last position.
(2) The transient MUTE is performed at the time of tuning. ( direct / alternate tuning.)
(3) A position OSD is displayed for 5 seconds.
(4) Digital AFT operation is performed after 240ms.

* This tuning system is F/S tuning, thus digital AFT is unnecessary in principle at least.

But, AFT is carrying out for the following reasons.

(1)If some hundreds of kHz RF shifts by move etc.,the claim will occur that NICAM

and TEXT do not operate.

(2)The old chassis of F/S tuning system shown below that has the digital AFT

function. F/S tuning system model : EB1/EB3/WB2A/WB2B/AB3A/AB3B.

(3)The V/S tuning system quality standards are satisfied that RF change can be

corrected to ±800kHz.

（In case of the China national standard, it is necessary to receive to ±1MHz.）

14

Training Manual FC3G2 Chassis

《Digital AFT》

* Digital AFT is substitute of the “hardware AFT” inside a tuner.

In order to set the tuning voltage as the optimal value, center frequency is searched
from the starting frequency

which deducted 1MHZ from the local frequency
memorized by E2PROM.
However, this digital AFT is terminated when rise/down processing of tuning voltage

becomes 100 times.

- LOCAL frequency is controlled by AFT voltage of the following table.

direction AFT Vol.
UP Vol. 3.5v-
CENTER Vol. 2.0v-3.0v
DOWN Vol. -1.5v

①The starting frequency data is outputed to Tuner. Wait for 240msec.
→ If AFT voltage is less than [ 1.5V ]. Jump to ④

→ Other, To the next.

②Frequency is raised by 500KHz/40msec (Tab.1-A) until AFT voltage becomes more
than UP voltage (3.5v).

- In case of following, Local frequency is set to an EEPROM data. Jump to ⑤

- Tuning data raised to +1.5MHz on the way,

- The digital AFT was performd 100 times or more,

③Frequency is raised by 100KHz/40msec (Tab.1-B) until AFT voltage becomes more
than DOWN voltage (1.5v).

- If a synchronized signal is lost on the way, it will return to ②

- In case of following, Local frequency is set to an EEPROM data. Jump to ⑤

1. Tuning data raised to +1.5MHz on the way,

2. The digital AFT was performed 100 times or more.

④Frequency is raised by 50KHz/40msec (Tab.1-C) until AFT vol becomes more than
CENTER voltage (2.0v).

- If a synchronized signal is lost on the way, it will return to ②

- In case of following, Local frequency is set to an EEPROM data. Jump to ⑤

1. Tuning data raised to +1.5MHz on the way,

2. The digital AFT was performd 100 times or more,

⑤Digital AFT complete.

Tab. 1 Digital AFT tuning speed

A B C
high speed up mid speed up low speed down

500KHz／40msec 100KHz／40msec 50KHz／40msec

15

Training Manual FC3G2 Chassis

* Input

(1) Detection of the synchronized signal of TV/AV.
Read register of the 1 chip IC (LA76818)

Status（D1 bit）

Judgment

1 Non - sign
0 sign

- It is determined by two continuation correspondence (20ms interval).

(2) Detection of an AFT signal uses a A-D input port (10pin).

- The AFT signal (0V-9V) outputted from an AFT circuit that is changed to 0V-5V by
resistance.

- This A-D input terminal port which consists of a 6-bit D-A conversion and a
comparator.

- Tuner always output AFT voltage of the TV signal, even if AV.

- An AFT signal is judged as follows:

The voltage level is read every 10ms.

↓f1

←3.5v 3.5v→ center freq

AFT signal ←2.0v

1.5v→

↑f2
Synchronized signal

(Attention)
The necessary condition of the sensitivity of an AFT signal is f2-f1 > 50kHz.

Input Vol. Level Judgment

L(0v～1.5v)

M(2.0v～3.0v)

H(3.5v～5v)

TU Vol. down
TU Vol. center
TU Vol. up

《Output》
* IIC bus is used for PLL control. (Matsushita PAL standardization F/S tuner)
* PLL control (transmission of data) is not performed in standby mode.
（the power voltage is not supplied to a PLL circuit）
* PLL control is not performed during bus open mode.
* PLL control register is refreshed every 20ms.

16

Training Manual FC3G2 Chassis

* The following data is transmitted.

Output

DATA（bit）

7 6 5 4 3 2 1 0
Slave address 1 1 0 0 0 0 1 0
Prog. divider 0 N14 N13 N12 N11 N10 N9 N8
Prog. divider N7 N6 N5 N4 N3 N2 N1 N0
Charge-pump 1 CP 0 0 1 RSA RSB 0
Band 0 0 0 0 B4 B3 B2 B1

- Prog. Divider control-> N14-N0

- CP＝１ (High current)

- Dividing ratio : 640 (50KHz)

Charge pump 1 CP 0 0 1 RSA RSB 0

1 １ 0 0 1 0 0 0

-BAND control -> P6-P4.

* Matsushita Tuner
BAND CHANNEL DATA

※CHANNEL No. <- from the

Tuner specifications

VL K1- K7(Z5) 00000001B
VH S8(Z6)- S41 00000010B
UHF E21- C57 00001000B

①Classification of VL and VH

Z5ch + 4MHz (=186.25MHz) is a boundary.

VL<186.25MHzVH
②Classification of VH and UHF
Z38ch + 3.5MHz(505.75MHz) is a boundary.
VL<505.75MHzUHF

* ALPS Tuner
BAND CHANNEL DATA (bit)

※CHANNEL No. <- from the

Tuner specifications

VL E2- S6(Z4) 00000001B
VH S7(Z5)- S36(Z33) 00000010B
UHF S37(Z34)- C57 00001000B

①Classification of VL and VH

Z4 ch + 4MHz（＝178.25MHz）is a boundary.

VL < 178.25MHzVH
②Classification of VH and UHF
Z33 ch＋4MHz(466.25MHz) is a boundary.
VL < 466.25MHz UHF

17

Training Manual FC3G2 Chassis

2-6 Horizontal/Vertical pulse input

The vertical and horizontal pulses from deflection circuits are input to pins 17 and 18 in
order to synchronize the ON Screen Display.
The vertical pulse is supplied from pin 3 of IC501 through the inverter circuit Q871.
The horizontal pulse is supplied from pin 5 of the fly back transformer through the
inverter circuit Q881 .
If one of these pulses is not supplied to the CPU, the on-screen display cannot be
displayed.

5VRC

R871
1/16GJ
10KC

Q871
AH

R870

1/16GZ0C

IC801

QXXAVC305P

14

FILT

15

C-CAPTION

BILINGUAL

16

17

VS

18 19

HS

R877
X

R877TM

1/16GJ

3.3KC

R878

X

MN/ST

BLK

Q881
AH

B

G

R

1/16GJ

3.3KC

C835
EM1

23

22

21

20

1/16GJ

3.3KC

R882

R881

R872

27K

R883

1/16GJ
33KC

R510

10K

R511

10K

C880

KK3300GQ

5V-1

C510

16EM22

(:LBWAJ)

V-SYNC

H-SYNC

IC501

LA78041

C511
KK0.01

GQ

76

R512
DJ
470

C517
35EM

220

:ERA15-02

:ED0448

R355

DJ10K

INPUT

D512

EM01Z

OUTPUT

STG VCC

C491
500KK
680A

D485

EU1

7SJ6.8VC

JP435

X

B1

130V

R488

1/2FJ1

R435

OUTPUT

5

R519
100

H-OUT

JP407

J

JP408

C437

250GJ

0.47

INPUT

4

X

JW1

1

GND

JP409

JP412

J

T471-H4

JP410

J

GND

VCC

C518

KK3300

T471

L40B16000

T471A
X

INVERT

R503

C521
35EM

2200
(:LBWA)

T471-H8

JP403

J

HEATER

LOW B

X

JP501

J

2400010

24V

JW37

1

JP503

J

B4S10B00100:

S10B1370N

JW36

1

D501

J

HV

FO

SC

7

11

T471-H6

2400010

64

64

PUMP UP

321

C520
100FK0.1

(D:BE)

T471-H1

2400030

1

1

T471-H10

2400010

10

10

VIDEO

T471-H2

2400030

2

2

+B

C437A

X

J

AFC

2400010

2400010

53

53

T471-H5

SW501

R501
2SJ1K

18

Training Manual FC3G2 Chassis

2-7 Service mode

19

Training Manual FC3G2 Chassis

20

Training Manual FC3G2 Chassis

21

Training Manual FC3G2 Chassis

3. IF /Video/Chroma/Deflection

The following figure shows a block diagram of the IF/Video/Chroma/Deflection IC
LA76818A peripheral circuit.

R125

9V

R115

56

C125

R121
1/16GJ

X

6.8KC

R124
1/16GJ
10KC

R122

D122

1/16GJ

2.2KC

1SS356

R244

Q122

27K

1/16GJ

AH

47KC

5V-1

X

JP171

R178

X

R188

C124

KK0.01
GQ

X

Q171

Q172

X

R245
1/16GJ
47KC

1/16GZ0C

X

R172

C185

C358

EM1

Q174

JP174

X

X161A

R180
X

X

R174

X

R175

X

C138
KK

0.022GQ

X

X

R358
1/16
GZ0C

JP173

R171

R177

X

X

X

1/16GZ
0C

1/16GZ0C

SF6376U

C121

KK0.01

GQ
C122
16EM

100

R185

C120
KK

0.022GQ

R130

C123

X161

X

Q176

C176

X

R186

X

X

JP176

1/16
GZ0C

AUDIO

1

OUTPUT

2

FM OUTPUT

3

PIF AGC

RF AGC

4

OUT

5

IF IN

6

IF IN

7

IF GND

8

IF VCC

FM FILTER

R291

2SJ4.7

IC201

LA76818AM

EXT.AUDIO

APC FILTER

VCO COIL1

VCO COIL2

VCO FILTER

9V

C275
EM47

SIF IN

SIF APC
FILTER

SIF OUT

VIDEO

OUTPUT

(2Vpp)

IC202

L78M05CV:
BA178M05T:
MC78M05CT:

UPC78M05AHF

54

R176

C172

1/16GJ

KK0.01

10KC

GQ

53

52

R170

X

51

IN

R181

X

C133

X

50

C132
EM0.47

49

R179

X

48

C135

EM0.47

47

R140
1/16GZ
0C

469

L175

C171
KK1500
GQ

X

C177

321

X

L273

J

C174
CD10CGQ

R132
1/16GJ

470C

5V-1

C276
EM47

X171

X

L171
L14B1830N
:L14B1870N

Q173
X

R173

X

R114
1/16GJ
330C

C113
KK0.01

GQ
Q111
2SC2814
F4P

R116
1/16GJ
56C

JP111

B1

130V

R103

1SJ39K

R112

1/16GJ

5.6KC

C111
KK

0.01

GQ
R111
1/16GJ
1KC

X

3-1 IF stage

The IF signal output from the tuner is amplified by the pre-amplifier Q111, then sent to
the SAW (Surface Acoustic Wave) filter X161. The output signal of the SAW filter
X161 is input to pins 5 and 6. The IF signal thus input to the IC is then amplified by
the IF amplifier, and is detected by video detector with the VCO (Voltage Controlled
Oscillator) circuit consisted of L 171 (38 MHz coil) and it is output as a composite video
signal. The composite video signal passes through sound traps then amplified and it is
output as a video signal at pin 46. The output of pin 52 is supplied to pin 54, and is
detected by FM detector with SPLL (Sound Phase Loop Lock) circuit and it is output as
a FM signal at pin 2, and Audio signal at pin 1.

3-2 Video/Chroma stage

The video signal output from pin 46 of IC201 is then supplied to pin 44. The external
video signal from the A V terminal is supplied to pin 42.
The video signal input to pin 44 or 42 is processed in IC201, then seperated into the R
(red) at pin 19, G (green) at pin 20, and B (blue) at pin 21.
The external RGB signals for the on screen display or teletext display are input to pins
14(R), 15(G), 16(B). In the IC, the external RGB signal are mixed in the selection
circuit driven by blanking signal input to pin 17 and finally output to 19, 20, 21.
The colour, contrast, brightness, tint and sharpness controls can be controlled by the
CPU in 7 bits digital data through the analogue bus lines on pins 11 and 12.

3-3 Deflection stage

The Horizontal drive pulse is processed in IC201, and sent from pin27 than drives
transistor Q431. The vertical drive pulse is sent from pin 23 of IC201 to pin 1 of IC501,
vertical output is from IC LA78041.

D103
RD36EB1:
MTZJ36A:

DZXLBZA36A

C112
KK0.01
GQ

R101
1/16GZ
0C

R104

C107
EM47

X

11.IF

L101

J

5V-1

R106

R107

100

100

C109

9.TB

7.PB

6.MB

R105

JP102

J

X

R102

J

D102

C102

X

X

R108

18K

C101
16EM
470

X

5.DATA

R109
1/16GJ
68KC

4.CLOCK

J30B0250N

:J30B1380N

C108

TP-A

X

3.GND

C106

EM47

A101

F1BEB0270:
F1BEB0300

1.AGC

22

Training Manual FC3G2 Chassis

4. Audio Output.

The internal audio signal from pin 1 of IC201 is supplied to pin 1 and 30 of IC3701,
audio output amp using AN17820B (for stereo model) or AN7523N (for mooral model).
The external audio signal is supplied to IC3701(for model with surround option) or
IC1201 (for model without surround option). The sound volume control by CPU data.
Note : IC3701 (NJW1142MP) is used as audio/tone control IC.

JP374

L-FI

R-FI

FROM CPU

MNST

LIN

RIN

R1202

R1201

X

R1203

X

MN/ST

AUDIO-CONTROL

R3701

XX

18

2

3

4

5

6

7

8

9

10

11

12

13

14

IC3701

NJW1142MP

CVA

CVB

OUTa

L--L

L--R

L--L

R--R

L--R

TV

AV

AV

AV

IN1B

IN2B

IN3B

IN4B

MONB

CSR

TONE-Hb

TONE-Lb

LINEbLINEa

OUTb

AGC

CTH

CTL

VREF

Vcc

IN1A

IN2A

IN3A

IN4A

MONA

SR-FIL

TONE-Ha

TONE-La

SDA

SCL

GND

30

C3721
EM4.7

29

C3722
EM4.7

28

C3723
EM4.7

27

26

25

24

23

22

R3725
X

21

20

19

18

17

1615

C3701

16EM470

IC1201

1

2

3

D1201

R

L

NC

MONO/ST

X

X

C1202
X

C015

X

R015

1/16GJ3.3KC

GND

VCC

NC

X

R1205

X

9V-2

R1204

X

7

6

C1201

54

X

X

KK0.022GQ

JP373

X

16KK0.33BA

L OUT

IIC BUS

R OUT

C3710 C3720
EM4.7 EM4.7

C3711
EM4.7

C3712
EM4.7

C3713
EM4.7

C3730

C3714

KK2200GQ

C3715

R3702

C3717
EM1

C3727
EM1

SDA

R3731

1/16GJ100C

SCL

R3732

1/16GJ100C

C025

X

R025
1/16GJ

3.3KC

L OUT

R OUT

R3726

X

JP375

C3731
16KZ1GMF

C3724
KK2200GQ

C3725
16KK0.33BA

C3732
16KK

0.33BA
C3733

EM1

C3734
EM1

C3735
EM1

C3702

25KK

0.1GQ

1/16GZ0C

X

JP372

X

JP371

L-RO

R-RO

ATV

X

AOUT

AIN

9V

D3701

AA

L3701

9V-1

J

9V-2

FOR WOOFER
OUT OPTION

SP901

A10B26200

SP902

A10B26200

00

K1

J12B06000

HEAD

PHONE

GND AUDIO

K001

K002

J10EA040N

:J10KR040N

1

X

R006

1/2DJ150

R007

1/2DJ150

C035

J

JP012

X

C034

IC001

AN17820B

J

JP011

X

JP011A

X

TO CPU

R012

Q011

X

R out +

R052

X

R051

X

9V

R022

R013

X

X

R014

X

R out -

Q021

X

R023

R024

Vol

X

C012

X

X

C022

X

Gnd out

C060
X

C059
X

X

R in

C021

EM1

Gnd in

C011
EM1

L in

R032

1/16GJ

27KC

Std by

= L

R005

10K

D002

X

L out -

C031

EM47

9V

R034

1/16GZ0C

C013

X

R036

1/16GZ0C

C014

X

Gnd out

L out +

R033

27K

R035

1.5K

R037
27K

R038
1/16GJ

1.5KC

Vcc

123456789101112

25EM2200

LBWA

C001

C3737

R008

J

C3738

J

D003

X

D004

11V

P.F

JP010

X

J

R010

X

X

XX

R644-H1

TO CPU
MUTE

L IN

FROM AUDIO
PROCESSOR OUTPUT

R IN

23

Training Manual FC3G2 Chassis

5. Vertical

The ramp signal, from pin 23 of IC201 drives the vertical drive circuit at pin 1 of IC501.
In the first half of scanning period, a deflection current is sent from pin 5 and passed
through the following path;
Vcc(24V) Æ D512 Æ pin 6 Æ pin 5 Æ DY Æ C515 Æ R518.
An electric charge is then stored in C515. In the last half of scanning period, the
current path is C515 Æ DY Æ pin 5 Æ pin 4 (GND) Æ R518.
In this way, an increasing sawtooth waveform current flows directly to the DY to
perform electron beam deflection. During the first half of the blanking period, the
vertical ramp signal suddenly turns off. Since there is no longer any current flowing
into the DY, the magnetic field in DY collapses causing an induced current to flow as
flows; DY Æ pin 5 Æ pin 4 Æ R518 Æ C515 Æ DY. Once the magnetic field in DY has
dissipated, the current path becomes; Vcc Æ pin 2 Æ pin 3 Æ C517 Æ pin 6 Æ pin 5 Æ
DY Æ C515 Æ R518. And when the prescribed current values is reached, the vertical
drive pulse turns on. This completes one cycle.

6. Horizontal Output

The horizontal oscillator signal is output from pin 27 of IC201 and used for switching
the drive transistor Q431. This switching signal is current amplified by the drive
transformer T431 and drives the output transistor Q432. When Q432 turns ON,
increasing current flows directly to the DY through
D439 Æ C441/C442 Æ L441/R441 Æ L442/R442 Æ DY Æ Q432-C Æ Q432-E.
And the deflection occurs during the last half of the scanning period. When Q432
turns off, the magnetic field stored in the DY up to that point causes a resonant current
to flow into the capacitors C420/C423 and charges them. The current stored in
C420/C423 then flows back to the DY causing an opposite magnetic field to be stored in
the DY. This field then collapses increasing a current which switches the dumper diode
in Q432 ON.
The resonance state is completed, and an increasing current then flows again directly
to the DY through the dumper diode.
By this means, the deflection in the first half of the scanning period is performed.
When Q432 turns ON at the end of the first half of the scanning period, the deflection
during the last half is begun, thus completing one cycle. ( see fig. on p. 25 )

24

Training Manual FC3G2 Chassis

J
X

R241

D249

X

D421
MTZJ16A:
RD16EB1:

9V

X

Q540

AE

R359

82K

R357

1.8K

R211

150

R212
150

R243
X

HORIZ.
DRIVE

R540

1K

L462

L26A00200:
L26B4630N

L26B0170N:
LM0045(:D)

D357
1SS133

5V-1

D210

J

24V

C540

25PM10

L461

C465

100GK

2.2

V-OUT

C230

X

JP202

J

R432

1/16GJ1KC

C431

X

L462-H1

2400030X

L462-H3

2400010

Q461-H2

2400010

Q461-H1

C232
HJ0.33G

C210

25EM
1000

JP201

X

Q431

2SC3332

(R:S)

2400010

134

L462-H2

R478

X

2HEF0068--

C201

PM1

R431

X

Q461

2SB1274

(QRA:RRA)

Q461-1

C231

HJ

0.33G

R210
1/16GJ
3KC

C202

FJ0.015
(A:BE:D)

24V

R434
1/2DJ
100

C433
500KK
3900A

R433
1/2DJ
1K

R473

470

Q461A

X

Q462

H-DRIVE
TRANS

:B4L18B0020N

C434
35EM
47

JWW1

1

R471

1.5K

AE

VR462

R3D6472NJ:
R3D7472NJ

23

V-OUT

RAMP ALC

24

FILTER

25

H-VCC

H-AFC

26

FILTER

H-OUT

B1

130V

T431

AD0002(:C)

:L18B0540N

T431-H2 T431-H4

2400030 2400030

2400030

T431-H1

C432
500KK

1000A

R355

DJ10K

R426

10K

R480

C461

47K

X

R472

47K

R468

X

R469
82K

2400030

T431-H3

C355
KK1500

EM220T

CCD FILTER

CCD VCC

CLOCK

OUTPUT

VCO IREF

FBP IN

R445

X

400MJ0.15CQ:
250MJ0.15AP:
250MJ0.18AU
Q432-1

2HEA0236--

Q432

2SD2634YB

L431
L7201B:
L2G31R0MN

L432

B4Z21B0030N:

Z21B0050N:

ZZ0008

HORIZONTAL
DEFLECTION

PCC
CIRCUIT

C463

R461

C462

470

EM

0.47

C466

63GK0.39V
:HJ0.39G

D462

1.8K

R352

DJ10K

C442

Q432-H3

32

31

30

29

2827

2400010

KK0.01
GQ

R510

10K

R511
10K

R466

1.8K

D461

1SS133

R464
12K

R286
1/16GF4.7KC

D352
RD5.1EB2

5V-1

(:LBWAJ)

V OUT

PROTECT

L441

L71B0160N

C442-H1

2400030

2400030

C442-H2

X 2400030

C442-H3 C441-H3

Q432-H2

2400010

2400010

Q432-H1

D642

1.5M

D465

R467

1.2M

C468

25EM22

R354

22K

C510

16EM22

Q527

AH

L26B4560N

J441

X

C441-H1

2400030

C441
400MJ0.18CQ:
250MJ0.18A

X

(P:U)

C441-H2

D438

ERD07

-15L

D439

ERB44

-04

R463
680

J

C470

KZ

0.01F

D466

MTZJ20A:

RD20EB1

C527
EM10

L442

L442-H1
L441-H1

L441-H3

L441-H2

1500MH6800
(AN:XK:VBA)

C423A

C425

400NJ

0.02EAQ

R465

4.7K

VR463

R3D7102NJ

C467
10EM

220

D469

L442-H2

C423-H2

X

C423-H1

C511
KK0.01

GQ

X

X
2400010

2400030

2400030

C420

2400030

2400030

EU1

R462
470

R512
DJ
470

C517
35EM

220

C423-H3

2400030

C423

1500MH
7800(AN
:XK)

JP436

J

C424

400NJ

0.022EAQ

C464

EM1

JP463

R474
1/2DJ1K

R527
1/16GJ
56KC

R442
2SJ1K

R441
1SJ1K

C424AC425A

XX

X

INPUT

OUTPUT

STG VCC

76

D512

EM01Z

:ERA15-02

:ED0448

R514

8.2K

C491

X

C420-H3

2400030

C420-H2

R492

X

2400030

C420-H1

C486

250EM
33CY

JP435

R423

DJ47K

R422

DJ47K

OUTPUT

5

100

R515
39K

C514
EM22

R522

470

500KK
680A

D485

EU1

R488

1/2FJ1

R435

7SJ6.8VC

X

B1

130V

PROTECT

VERT.
DEFLECTION

IC501

LA78041

INPUT

VCC

GND

4

INVERT

PUMP UP

321

C518

R503

KK3300

X

24V

JW37

1

JP503

J

R519

T471-H10

VIDEO

T471-H2

+B

AFC

T471-H5

Q449

X

C521
35EM
2200
(:LBWA)

C524

R525
1SJ180

T471
L40B16000

T471A
X

R477

X

R477A

1SJ560

C449
X

JP501

J

100FK

0.1(D:BE)

D441
ERC05-10B:
RM11C

C487

X

T471-H8

2400010

JP403

J

HEATER

LOW B

R424
1K

R449
X

D501

J

11

D448

7

64

64

HV

FO

SC

2400010

2400010

2400010

JP404

X

D468

JW36

T471-H11

T471-H6

X

AA

1

R502

R487

J

ABL

T471-H7

JP405

R479

1/16GJ

2.2KC

X

R484
X

R486

X

J

C471

100PM

2.2(X:
LBZAJ)

MTZJ11C:
RD11EB3

C520

100FK0.1
(D:BE)

R516

1.2K

C515

25EM2200

LBWA

R518
1SJ1.8

T471-H1

H-OUT

2400030

1

1

JP407

J

2400010

10

10

JP408

X

JW1

2400030

2

2

1

C437

C437A

X

250GJ

0.47

JP409

J

JP412

X

2400010

T471-H4

JP410

J

2400010

53

53

GND

JP411

X

JP477

J

SW501

B4S10B00100:

S10B1370N

R501
2SJ1K

KDY

J10B0730N

HEATER

180V

R485
X

D486

X

JP483

J

R483

X

R481

2SJ4.7

R481A

X

D467

P

D476

C469
EM10

KDY-6

6
5

KDY-3

3

KDY-1

1

4

GND

GND

1

PROTECT

R475

1/2DJ330

DY
L70B17400

2400010

2400010

2400010

KQ

X

HV
FOCUS
SCREEN

25

Training Manual FC3G2 Chassis

7. Power Consumption Saving Circuit.

This chassis employs the internal oscillation circuit (SMPS : Switching Mode Power
Supply) on the power circuit for saving consumption of power during the stand-by mode.
( see page 26 for circuit diagram of power supply ).

The internal oscillation circuit consist of Q663, Q662, D662 and peripheral circuit.
Q663 and Q662 drives the photo coupler D610 and oscillation of power circuit
according to voltage level on point (A) in figure. During power on mode, the voltage on
point (A) is almost 0V and Q663 and Q662 maintain turning off.

When the set switches into stand-by mode, the voltage on point (A) increases about
24V. The voltage which is decided with R671 and R673 is applied to Q663-base and
drives Q663 and Q662 turning on. When Q662 turns on, the photo-diode in D610 is
completely turned on, then Q612 is turned on and Q613 is turned off. By this means,
the oscillation of power circuit stops and the voltage of secondary power supply falls
down. Also the voltage of point(A) falls down from 24 V gradually.

When the voltage on Q663-base is less than voltage of Q663-emitter, Q663 is turn off
and then Q662 is off, then D610 and Q612 are turned off. Finally Q613 starts the
oscillation and voltages are supplied to the secondary circuit. By this means, the
voltage on point (A) rises up and drives Q663 on again. By repeating the above
operation, the power consumption in the stand-by mode can be saved.

26

Training Manual FC3G2 Chassis

g

pp

y

PROTECT

D690

C690

EM2.2

Q690

1SS355

CT

R691

1/16GJ

AH

47KC

R694

5.6K

R690

R692

D691

1/16GJ

47KC

1/16GJ

20KC

AA

R693

1/16GJ

10KC

R695

C691

DJ6.8K

AD

Q693

35EM47

R696

1/16GJ

4.7KC

R697

1/16GJ

D692

47KC

EU1

C693

16EM47

11V

D693

R673

1/16GJ

560KC

EM0.22

C663

1/16GJ

22KC

R667

Q662

1/16GJ

10KC

AC

Q663

R666

AA

AH

Q654

24V

D662

MTZJ

6.8A:

9V

2SD1913

(QRA:RRA)

DZXLB

ZA6.8A

AA

D655

C665

R671

22K

R672

12K

16EM470

R656

Q652

R645

X

X

JP652

C656

1000KK

470(CRD:NH)

L652

1

R655

R653

J

DJ10K

1FJ5.6

23

2SB1565E

35EM

470T

C652

RN1Z

D652

IC681

BA178M05T:

MC78M05CT:

X

T611-H14

T611B-H14

R657

R652

5VRC

UPC78M05AHF:

X

R668

2SJ12

DJ3.9K

JP653

33K

1/16GZ0C

123

J

R646

C657

L78M05CV

1000KK470

(CRD:NH)

14

C681

L653

J

2SJ

12

R669

10EM470

R658

X

D653

FE301-1L43:

X

T611B-H13

15

D659

R659

X

Q653

25EM

C643

RU4YXLF-L1

T611-H12

T611B-H12

X

12

R651

1SJ270

X

X

1000T

C658

1000KK470

2400030

X

R660

1K

MTZJ10B:

D664

11V

(CRD:NH)

J

L654

16

AA

D671

AE

Q681

AD

Q651

C664

16EM220:

16EM220LBWA

RD10EB2:

DZXLBZA10B

AUDIO

D654A

2HEF0021--

:2HEF0065--

D654

2400010

D654-H1

D654-H2

2400010

T611-H13

L-ST

H-ON

R681

22K

PM1

C653

R654

15K

C654

25EM

3300

YG901C2-LB

T611B-H17

2400030

13

R682

1/16GJ

X

TP-130

C655

(CRD:NH)

1000KK680

2400030

T611-H17

X

17

560KC

JP631

L651

X

1SJ27K

X

C651-H1

X

C651

RU3AM

R661

160EM

220XJ

C639

DJ100K

VR651

R665

DJ12K

R663

150K

Q661

AH

R662

1/16GJ

R3D6222NJ:

R3D7222NJ

D661

MTZJ6.2C:

RD6.2EB3:

3.9KC

DZXLBZA6.2C

B1

130V

R664

JP633

J

C651-H2

X

D651

J

C610

X

T611-H6

7

6

5

4

R615

T611

L51B5900N

220

X

X

T611-H5

L611

C618A

X

C618

630GK0.047DCN

2SJ

68K

R626

R625

2SJ68K

R620

1/2DJ

470K

C616

C615

C617

R621

X

2000KK

220CRD

2000KK

220CRD

EG01C

D611

Q611

R622

DJ47

1/2DJ

470K

2SC

T611-H7

L613

2274

2400030

ZZ0122:

R624

(D:E:F)

R623

C628

X

AT3 AT3 AT3 AT3 AT3 AT3 AT3 AT3 AT3 AT3 AT3 AT3

4

X

C619

PC123X5YFZ:

PC123Y52:

TLP421F-BL

D610

R619

400EM

220XC

C609A

2400010

2400010

2400010

2400010

400EM

220XC

AT3 AT3 AT3 AT3

X

AT3 AT3 AT3

AT3

AT3

AT3AT3AT3

RBV-608

D601

C609

D606

C606

C605

D605

1234

R602A

15WK1.8

(VE:M)

2400010
2400010

X X

24000102400010

JP601

D608

X

C608

C608

1000KK

1000(CBB:HB)

D605/.../D608

XX

XX

C607

X

X

D607

C605/.../C607

C602

2400030

2400030

2400030

J

X

PS601

JP602

1

2

250GM0.1X

(BJ:D:E):

275GM0.1

(VB:XB)

X

2400030

X

2400030

L601

DHXAAEV0070

X

L601A

R601

X

2400030

X

2400030

F35B0570N

:B4F35B0040N

:F35B1130N

X

C601

250GM0.1X

(BJ:E:D):

275GM0.1

VA601

ERZV14D471

(XB:VB)

C613

FK0.1BE

:FK0.1D

SW601

S10B6230N

2400010

2400010

X

T611-H8

J

L612

X

Q613-H6

Q613-H2

2400010

2400010

Q613-H3

ZZ0122XXA

1/2

FJ10

L615

D617

330K

R627

22K

X

D615

DJ22

D614

ES1

F601

4A250VTW

:4A250VHOTS

L614

Q613-H1

2400010

Q613

R631

ZZ0122

(:XXA)

1SS133

1

ZZ0122

(:XXA)

2SK

3102F

47K

C614

D612

ERA81-004

Q612

2SA984

(E:F)

HJ0.22G

D616

MTZJ20B

D619

MTZJ10C:

RD10EB3

2

L616

:RD20EB2

Z21B

0140B

DJ

R611

470

R616

R613

3

2400030

T611-H3

2400010

2400010

Q613-H5

R633

1SS

D643

10K

FJ330P

Q613-H4

2SJ0.33

133

Q625

R632

2SC

2SJ

2274

0.27

(E:F)

R628

C611

R614

1/2CK

D641

R641

22K

1/2CK

R629

5.6MXG

C644

25EM

3.3

18K

R643

AD

Q642

J

10K

Q641

FJ0.01BE:

FJ0.01D

5.6MXG

C629

250KM3300XN:

R644

22K

R642

AB

250KK3300XH

Circuit
l

47K

. of AC5G1 Power Su
Fi

AT3

27

Training Manual FC3G2 Chassis

Part 2 Block Diagram of ICs

1. LA76818A (IF/VIDEO/CHROMA/DEFLECTION)

28

Training Manual FC3G2 Chassis

29

Training Manual FC3G2 Chassis

2. LA78041N (VERTICAL OUTPUT)

3. AN17820B (AUDIO OUTPUT)

30

Training Manual FC3G2 Chassis

4. LA7642NM (SECAM DECODER)

5. 24LC16B/P (IC MEMORY)

31

Training Manual FC3G2 Chassis

Part 3 Trouble shooting Chart

Dead

No picture – no sound

No picture – sound OK

No sound – picture OK

No Color & color NG

No vertical deflection

No On-Screen Display

Page 33 - 35

Page 36 - 37

Page 38

Page 39

Page 40

Page 41

Page 42

32

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: Dead

Is the fuse OK

Check voltage on both
ends of C609

Check voltage on pin 1
of IC681

Is the power LED
lighting ?

Check voltage (+24V)
on Q652-collector

Check voltage (+130V)
on both ends of C651

Go to next page

Dead

YES

+390V~400V

+12.5V

YES

YES

YES

NO

0V

0V

NO

NO

NO

Are there any burned part ?
Check power primary circuit C601, C602,
VA601, PS601, R602, C608, C609,
D601/D605~D608, Q611, Q612, Q613, Q625,
C613, R624.
Secondary circuit, Q661, D661, C651, R661,

AC cord, SW601, F601, L601, R602.

Q611, Q612, Q613, Q625, R620~R626, C651,
T611, L614, Q663, Q662, D653, D662, D661

IC681, C681, IC801, IC802, C805

Q652, D652, R653

C651, D651, Q432

33

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: Dead

Disconnect error detector diodes D655,
D690, D693, D468

Check follows

* To avoid the damage to the
other circuits, please turn set on
for 2-3 seconds for checking.

Does horizontal line
appear on the screen?

Check voltage on pin
27 of IC801

Check voltage (+24V)
on Q652-collector

Check voltage (+9V) on
Q654-emitor

Go to next page

NO

+5V

YES

YES

YES

0V

NO

NO

Check vertical deflection circuit.

R830, IC801, and check error detection lines

Q652, D652, R653

Q654, R656, R668, R669, D653, C643

34

Training Manual FC3G2 Chassis

Troouble Shooting Chart Startpoint symptom: Dead

Check waveform on pin 27 of
IC201

Check waveform on Q431­collector

Is the CRT heater coil lighting

Check voltage on terminal KQ-1

Check voltage on both ends of
C469 (+5V to +10v)

YES

YES

YES

+180V

NO

0V

0V

NO

IC201, R211

NO

C434, T431, R434,
Q431, R432, R212

Horizontal Output circuit, Q432,
T471, T431, DY, R481

Check voltage (+B) circuit & T471

C469, D467, R475

35

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No picture-no sound

(

)

No picture/ No sound

Is CRT heater lighting?

NO

Go to chapter “Dead” on page 35

YES

Is video signal observed on pin 44
IC201

YES

IC201

NO

Is video signal observed on pin 46
of IC201

YES

R140, R141, peripheral
circuit for AV switch

IC1401, IC1501

NO

Check voltage (+36V) on both
ends of D103

0V

R103, D103, C107

Go to next page

36

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No picture-no sound

Is supply voltage (+5v) observed
on terminal pin 6 & 7 of Tuner
A101

NO

IC202, C278, C101

YES

Check AGC voltage on terminal
AGC on the tuner

+3V to
+6V

0 or +12V

C106, R109, IC201

Check SDA & SCL
SDA ~ 4,1V : SCL ~ 3,9V

NO

IC Memory IC802, R106,

OR

Check aerial cable, tuner
and IF peripheral circuit

X161, Q122, D122, C123,
C113, Q111, C111

Memory Circuit
IC801, IC802

AFT Circuit
Q111, C111, C113, R111,
R112, R114

Video Detector Circuit
L171

AFT Circuit from CPU pin 10 to one
chip pin 10 : C273, C804

X-SW from CPU pin 33
C823, R815, R125, Q122

37

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No picture-sound OK

No picture-sound OK

Is -Y signal observed on pin 42
of IC201

NO

C227, C1502, IC1501,
IC201.

YES

Is RGB signal observed on
IC201 pin 19, 20 & 21

NO

RGB, VCC. Pin 18
C233, C240, R230, 9V line.

YES

Check 9V line to CRT unit

NO

9V line to CRT unit

T471, Screen circuit CRT unit, &
heater circuit

38

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No sound-picture OK

No sound-picture OK

Check speaker, terminal speaker,
IC001 output pin 2 & 4 and 10
& 12 (do not reverse polarity)

Check Vcc 11V

NO

NO

Check D654, C654, IC001

YES

Check input IC001 pin 6, 8

YES

IC001

NO

Check IC3701 pin 10, 21 (for output)
and 1, 30 (for input)

NO

Check Audio out IC201 pin 1

NO

Check SIF circuit pin 52 IC201 to pin
54 IC201

39

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No color & color NG

No color & color NG

PAL, NTSC

Check pin 39 IC201, 2.87V

NO

X211, C212

IC201

SECAM COLOR

Check pin 22, IC201, 2V

NO

IC281, IC201

Color Noise
Check pin 39: 3.32Vdc
38: 2.85Vdc
37: 1.95Vdc
36: 3.17Vdc
35: 0.93Vpp
34: 0.93Vpp
32: 8.45Vdc
31: 4.58Vdc

40

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No vertical deflection

No Vertical deflection

Check voltage on pin 2 of IC501

NO

D652, R653, Q652

Check waveform on pin 5 IC501

+24V

NO

IC201, IC 501

YES

R525, C524, R515, R516

Compressed or expanded
vertical screen size

R514, R515, R516, R518,
R522, R525, C514, C515,
Service data

41

Training Manual FC3G2 Chassis

Trouble Shooting Chart Startpoint symptom: No on-screen

No On Screen Display

Check waveform on pin 17 of
IC801

YES

Check waveform on pin 18 of
IC801

Vertical. 5V

Horizontal. 5V

NO

NO

Q871, R871, R877,
R870, C835, R872

Q881, R881, R882,
R883, C880, R355

YES

IC801, IC201

display

42

Training Manual FC3G2 Chassis

12. June. 2003

:

:

～

Judgement：Fail → Pass

14. May. 2003

：

Date

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

X : Short / Open the components in power off mode and test it when power turns on.

Y : Short / Open the components in power on mode and confirm it is performance.

21-C5GJ / CG21KF2G

1st.Engineering trial

(DDERC05-10B-B) F601(4A250VTW)Open. R602

02 D606 Short Y Power shut down. Power oscillation stopped. F601 a moment Pass

(DDERC05-10B-B) F601(4A250VTW)Open. R602

03 D607 Short Y Power shut down. Power oscillation stopped. F601 a moment Pass

(DDERC05-10B-B) F601(4A250VTW)Open. R602

04 D608 Short Y Power shut down. Power oscillation stopped. F601 a moment Pass

(DDERC05-10B-B) F601(4A250VTW)Open. R602

05 R621 Open Y No problem. No circuit and component damaged. ** 180s Pass

(RDA5603JPCANB) X No problem. No circuit and component damaged. ** ** Pass

(RS26802JGDANN)

06 R626 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

07 C613 Short Y Power shut down. No circuit and component damaged. ** a moment Pass

(CF1H104KADAJC) X No power operate. No power oscillation started. ** ** Pass

Open Y No problem. No circuit and component damaged. ** 180s Pass

X No problem. No circuit and component damaged. ** 180s Pass

08 R622 Open Y Power shut down. No circuit and component damaged. ** a moment Pass

(RDB47R0JPBANB) X No power operate. No power oscillation started. ** ** Pass

(RDD4703JPAANB)

09 R623 Open Y No problem. No circuit and component damaged. ** a moment Pass

43

Noisy sound of an Intermittent oscillation

X No power operate. No power oscillation started. ** ** Pass

T2SC2274-E--C Q625 (T2SC2274-E--C) All Short Q625

10 Q611 B-C Short Y Power shut down. Power oscillation stoped. a moment Pass

Short open test of components

Model number

Sample form

■ Assy, pwb, MAIN CG21KF2G

Circuit No. Location Fault mode X:Y Raster & Audio condition Circuits & Components situations Damage c. Test time Result Remark

Primary 01 D605 Short Y Power shut down. Power oscillation stopped. F601 a moment Pass

Q611 (T2SC2274-D--C) All Short Q611

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

44

Power shut down. Power oscillation stoped. a moment Pass

B-E Short Y

T2SC2274-E--C Q625 (T2SC2274-E--C) All Short Q625

10 Q611

Primary

Power shut down. Power oscllation stopped. a moment Pass

C-E Short. Y

Power shut down. Power oscillation stopped. a moment Pass

B Open Y

Power shut down. Power oscllation stopped. a moment Pass

C Open Y

Power shut down. Power oscillation stopped. a moment Pass

11 Q611 E Open Y

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

45

T2SC2274-E--C Q625 (T2SC2274-E--C) All Short Q625

T2SA984-E---C X No power operate. No power oscillation started. ** ** Pass

Primary 12 Q612 B-C Short Y Power shut down. Power oscillation stopped. ** a moment Pass

Power shut down. Power oscillation stopped. a moment Pass

B-E Short Y

C-E Short. Y Power shut down. Power oscillation stopped. ** a moment Pass

X No power operate. No power oscillation started. ** ** Pass

Power shut down. Power oscillation stopped. a moment Pass

B Open Y

Power shut down. Power oscillation stopped. a moment Pass

E Open Y

Power shut down. Power oscillation stopped. ** a moment Pass

13 R624 Open Y

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

Q611 (T2SC2274-D--C) All Short Q611

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Pass

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

R632 (RS2R220JGDANN) Open R632

46

No power operate. No power oscillation started. ** ** Pass

Power shut down. Power oscillation stopped. ** a moment Pass

Power shut down Power oscillation stopped. a moment Pass

X

Open Y

(DDES1-------B)

(RFXAAA10R0JFN)

14 D614 Short X.Y

No power operate No power oscillation started. a moment Pass

X

No problem. No circuit and component damaged. ** 180s Pass

No problem. No circuit and component damaged. ** 180s

Open X-Y

DZMTZJ8.2C--B

15 D619 Short X.Y

Primary

16 R631 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

Power shut down. Power oscillation stopped. a moment Pass

T2SK3102-F--N Q625 (T2SC2274-E--C) All Short Q625

(RDD4702JPAANB)

17 Q613 G-D Short Y

Power shut down. Power oscillation stopped. a moment Pass

X No power operate. No power oscillation started. ** ** Pass

G-S Short Y Power shut down. Power oscillation stopped. ** a moment Pass

T2SK3102-F--N Q625 (T2SC2274-E--C) All Short Q625

18 Q613 D-S Short Y

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

R632 (RS2R220JGDANN) Open R632

Q613 (T2SK3102-F--N) All Short Q613

R613 (RFXAAA1201JFN) Open R613

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

R602 (RWXAAZ1R8KKAN)Open R602

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

47

Power shut down. Power oscillation stopped. a moment Pass

G Open Y Power shut down. Power oscillation stopped. ** 2s Pass

T2SK3102-F--N Q613 (T2SK3102-F--N) All Short Q613

18 Q613 S Open Y

Primary

Power Shot Down Power oscillation stopped. a moment Pass

19 C615 Short Y

(CK3D471KANHNC) Q625 (T2SC2274-E--C) All Short Q625

No problem. No circuit and component damaged. ** 180s Pass

Open X.Y

No problem. No circuit and component damaged. ** 180s Pass

20 D612 Short X.Y

No power operate. No power oscillation started. ** ** Pass

No problem. No circuit and component damaged. ** 180s Pass

Power shut down. Power oscillation stopped. ** a moment Pass

X

Open X.Y

(1SS133)

(ZZ0122)

21 L614 Open Y

Power shut down Power oscillation stopped. a moment Pass

No problem. No circuit and component damaged. ** ** Pass

Y

Short

(RDD2202JPAANB)

22 R627 Open X.Y

No power operate No power oscillation started. a moment Pass

X

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

R602 (RWXAAZ1R8KKAN)Open R602

Pass

** 180s

No circuit and component damaged. ** 180s Pass

Pass

** 180s

No circuit and component damaged. ** 180s Pass

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

48

No problem. No circuit and component damaged. ** 180s Pass

No power operate. No power oscillation started ** a moment Pass

(CH1H224JAGAJC) X

23 C614 Short Y

Primary

No problem. No circuit and component damaged. ** 180s Pass

Open X.Y

No problem. No circuit and component damaged. ** 180s Pass

24 D617 Short X.Y

No problem. No circuit and component damaged. ** 180s Pass

Open X.Y

(1SS133)

(RDD1002JPAANB)

25 R641 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

No problem. No circuit and component damaged. ** 180s Pass

Picture is broken No circuit and component damaged. ** 180s PassXPicture is broken No circuit and component damaged. ** 180s Pass

No problem. No circuit and component damaged. ** 180s Pass

X

B-E Short Y

T2SC1815-GR-C

26 Q642 B-C Short Y

No problem.

No problem. No circuit and component damaged.

No problem. No circuit and component damaged. ** 180s Pass

No problem. No circuit and component damaged.

C-E Short X.Y

27 Q641 B-C Short Y

No problem.

X

B-E Short Y

(TXXAAQ6562G-C)

X Horisontal picture more wide No power oscillation started. ** 180s Pass

X

C-E Short Y Horisontal picture more wide No circuit and component damaged. ** 180s Pass

28 Q625 B-C Short Y Power shut down. Power oscillation stopped. ** a moment Pass

(T2SC2274-E--C) X No power operate. No power oscillation started. ** ** Pass

Power shut down. Power oscillation stopped. a moment Pass

B-E Short Y

C-E Short Y Power shut down. Power oscillation stopped. ** a moment Pass

Power shut down. Power oscillation stopped. a moment Pass

X No power operate. No power oscillation started. ** ** Pass

B Open Y

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Power shut down. Power oscillation stopped. a moment Pass

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Power shut down. Power oscillation stopped. a moment Pass

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

No problem. No circuit and component damaged. ** 180s Pass

Power shut down. Power oscillation stopped. a moment Pass

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Picture is broken for a while off Power oscillation stopped. ** 2s Pass

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

49

(T2SC2274-E--C) Q625 (T2SC2274-E--C) All Short Q625

29 Q625 C Open Y

E Open Y

(RS2R220JGDANN)

(CF1H103JADAJC) Q625 (T2SC2274-E--C) All Short Q625

31 C611 Short Y

Primary 30 R632 Open X.Y

Open Y

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

Power shut down. Power oscillation stopped. a moment Pass

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

R602 (RWXAAZ1R8KKAN)Open R602

X No power operate No power oscilation operate a moment 180s

Q625 (T2SC2274-E--C) All Short Q625

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

Q641 (TXXAAQ6562G-C) All Short Q641

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

Q611 (T2SC2274-D--C) All Short Q611

R620 (RDA5603JPCANB) R620

R627 (RDD2202JPAANB) Open R627

D654 (DDYG901C2-LBN) R619

Q613 (T2SK3102-F--N) All Short Q613

50

(RDD1802JPAANB)

(RDD2202JPAANB)

32 R643 Open X.Y Picture is broken No circuit and component damaged ** 180s Pass

33 R644 Open Y No problem. No circuit and component damaged. ** 180s Pass

(RDD4702JPAANB)

(RDD1001JPAANB) Q625 (T2SC2274-E--C) All Short Q625

35 R615 Open Y

34 R642 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

Primary

(RFXAAA1201JFN) X Stand by mode No circuit and component damaged. ** 180s Pass

36 R613 Open Y No problem. No circuit and component damaged. ** 180s Pass

130 V 37 C651 Short Y Power Shut Down Power Oscilation Stoped

(Main B) CEXAA2C221AJN Q625 (T2SC2274-E--C) All Short Q625 a moment Pass

Q612 (T2SA984-E---C) All Short Q612

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

IC001 (QAN17820B---N) IC001

Q625 (T2SC2274-E--C) All Short Q625 180s Pass

Q613 (T2SK3102-F--N) All Short Q613

Q612 (T2SA984-E---C) All Short Q612

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

R613 (RFXAAA1201JFN) Open R613

51

Picture is broken No circuit and component damaged. ** 180s Pass

X.Y

Short Y Power Shut Down Power Oscilation Stoped

DDRU3AM-----B IC501 (QLA78040N---N) IC501 a moment Pass

38 D651 Open Y Power Shut Down Power Oscilation Stoped

(RS13902JGCANN)

40 R103 Open X.Y Noise comes out in screen. No circuit and component damaged. ** 180s Pass

41 D103 Short X.Y No tunner oscillated. No circuit and component damaged. ** 180s Pass

130 V 39 R663 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(Main B) (RDD1503JPAANB)

Short

Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(DZMTZJ36A---B)

(CEXLB1H470WAJ) Open X.Y No problem. No circuit and component damaged. ** 180s Pass

42 C107

Vertical 43 D512 Short Y Number of chanel run up No circuit and component damaged. ** 180s Pass

deflection (DDERA15-02--B) X No problem. No circuit and component damaged. ** 180s Pass

Open X・Y No vertical deflection operate. (One line) No circuit and component damaged. ** 180s Pass

45 R511 Open X.Y No vertical deflection operate.(One line) No circuit and component damaged. ** 180s Pass

deflection (RDD1002JPAANB)

Vertical 44 R510 Open X.Y No vertical deflection operate.(One line) No circuit and component damaged. ** 180s Pass

(RDD1002JPAANB)

(CEXLB1C220WAJ) Open X.Y Picture is broken No circuit and component damaged. ** 180s Pass

(RS11200JGCANN)

46 C510 Short X.Y No vertical deflection operate.(One line) No circuit and component damaged. ** 180s Pass

47 R525 Open X.Y Vertical size is extend to 10%.(Picture is broken) No circuit and component damaged. ** 180s Pass

48 C524 Short X.Y No vertical deflection operate.(One line) R518 open R518 180s Pass

(CF2A224KBEAJC) Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(RDD1202JPAANB)

49 R516 Open X.Y No vertical deflection operate.(One line) No circuit and component damaged. ** 180s Pass

50 R515 Open X.Y No vertical deflection operate.(One line) No circuit and component damaged. ** 180s Pass

(RDD3902JPAANB)

*Temperture of IC501(body). : 93℃

*Temperture of IC501(body). : 53℃

Vertical lower size is shrunk to 80%.

*Temperature of R433(body). : 48℃

52

X No Power Operated Q625 (T2SC2274-E--C) All Short Q625 a moment Pass

Open X.Y Vertical upper size is extend to 120%. No circuit and component damaged. ** 180s Pass

(RDD1202JPAANB)

51 R514 Open X.Y Abnormal vertical deflection operate.(picture is broken) No circuit and component damaged. ** 180s Pass

Vertical 52 C515 Short X.Y No picture but TV on (backgroud is white) No circuit and component damaged. ** 180s Pass

(CEXLB1H100WAJ)

53 C514 Short X.Y One line No circuit and component damaged. ** 180s Pass

deflection (CEXLB1E222WAJ) Open X.Y Vertical size is shrunk to 10%. No circuit and component damaged. ** 180s Pass

CEXLB1V222WAN R653 (RFXAAA1R00JFN) Open R653

54 C521 Short Y Power Shut Down IC001 (QAN17820B---N) Burn IC001 2s Fail *1

Open X.Y Upper side raster turn over. No circuit and component damaged. ** 300s Pass

(CEXLB1V221WAJ)

55 C517 Short X.Y Upper side raster turns over. No circuit and component damaged. ** 300s Pass

56 R434 Open X.Y Power shut down. (Stand by mode.) Power fail circuit operated. ** a moment Pass

Horizontal

Open X.Y Power shut down. (Stand by mode.) No circuit and component damaged. ** 120s Pass

Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(CK2H102KAABNC)

(CEXLB1V470WAJ)

59 C433 Short X.Y No problem. No circuit and component damaged. ** 180s Pass

58 C432 Short X.Y Power shut down. (Stand by mode.) Power fail circuit operated. ** 3s Pass

57 C434 Short X.Y Power shut down. (Stand by mode.) Power fail circuit operated. ** 3s Pass

drive (RS13300JGCANN)

Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(CK2H392KAABNC)

Horizontal 60 R441 Open X.Y No problem. No circuit and component damaged. ** 180s Pass

(AC0013B)

61 L441 Open X.Y One line Smoke from R411 (Resistance of R411 50%) ** 180s Pass

deflection (RS11001JGCANN)

62 L432 Open Y Power shut down.(Stand by mode.) Power fail circuit operated. ** 3s Pass

(L3004) X Power shut down.(Stand by mode.) Power fail circuit operated. ** a moment Pass

63 L431 Open X.Y Power shut down.(Stand by mode.) Power fail circuit operated. ** a moment Pass

(L3004)

180 V 64 D485 Short Y.X Screen up; Scanning appear; Sound OK R488 (RFXAAA1R00JFN) Open R488 180s Pass

Open Y.X Screen up; Scanning appear; Sound OK R488 (RFXAAA1R00JFN) Open R488 180s Pass

(DDEU1-------B)

65 C486 Short Y Screen up; Scanning appear; Sound OK R488 (RFXAAA1R00JFN) Open R488 180s Pass

(CE2E330MCYANC)

Q613 (T2SK3102-F--N) All Short Q613

K

Q612 (T2SA984-E---C) All Short Q612

R632 (RS2R220JGDANN) Open R632

R624 (RFXAAA10R0JFN) Open R624

Ω R696 = 4,7 ΚΩ

R613 (RFXAAA1201JFN) Open R613

53

(RS24R70JGDANN)

(RDA3300JPCANB)

67 R475 Open X.Y Power shut down.(Stand by mode.) Power fail circuit operated. ** 3s Pass

Heater 66 R481 Open X.Y Power shut down.(Stand by mode.) Power fail circuit operated. ** 3s Pass

(RDB1002JPBANB)

(RDD1503JPAANB)

AFC 68 R355 Open X.Y Raster shifts to left a little. No circuit and component damaged. ** 180s Pass

ABL 69 R228 Open X.Y Brightness level up.(background is tin) No circuit and component damaged. ** 180s Pass

(RDD1001JPAANB) (background is green)

70 R424 Open X.Y Horizontal and vertical size extend. No circuit and component damaged. ** 180s Pass

(RDB4702JPBANB)

ABL 71 R422 Open X.Y Brightness level down. No circuit and component damaged. ** 180s Pass

9 V 72 R656 Open Y Power shut down (stand by mode) Power fail circuit operated. ** 180s Pass

(RS12700JGCANN) X Stand by mode Power fail circuit operated. ** 180s Pass

73 Q654 B-C Short Y No problem. No circuit and component damaged. ** 180s Pass

(T2SD1913-QRAN) X No problem. No circuit and component damaged. ** 180s Pass

B-E Short X.Y Power shut down.(Stand by mode.) Power fail circuit operated. ** a moment Pass

Open X.Y No problem No circuit and component damaged ** 180s Pass

(CEXLB1E222WAJ)

11 V 74 C001 Short X.Y Stand by mode (LED is on-off condition) Power fail circuit operated. ** 180s Pass

Open Y.X No problem No circuit & component damage ** 180s Pass

CE1E332MAAANN

75 C654 Short Y.X Stand by mode Power fail circuit operate ** 180s Pass

NB *1 : When the capacitor C521 is shorted, IC001 burn & R653 open. It's OK after improve the value of resistor R696 = 47