Hitachi CPX2102MS Schematic

No. 0420

SERV IC E M A N UA L
M A N UEL D 'E N TR ETIE N
W A RTU N GSH A N D BU CH

CAUTION:

Before servicing this chassis, it is important that the service technician read the “Safety
Precautions” and “Product Safety Notices” in this service manual.

ATTENTION:

Avant d’effectuer l’entretien du châassis, le technicien doit lire les «Précautions de sécurité»
et les «Notices de sécurité du produit» présentés dans le présent manuel.

VORSICHT:

Vor Öffnen des Gehäuses hat der Service-Ingenieur die „Sicherheitshinweise“ und „Hinweise
zur Produktsicherheit“ in diesem Wartungshandbuch zu lesen.

CPX2102MS

Data contained within this Service
manual is subject to alteration for
improvement.

Les données fournies dans le présent
manuel d’entretien peuvent faire l’objet
de modifications en vue de perfectionner
le produit.

Die in diesem Wartungshandbuch
enthaltenen Spezifikationen können sich
zwecks Verbesserungen ändern.

NAMES»

SPECIFICATIONS AND PAR TS ARE SUBJECT TO CHANGE FOR IMPROVEMENT

Monitor

December 1999

SERVICE
MANUAL

21 "F" CHASSIS

1. Precautions

--------------------------------- 3
1-1. Safety Precautions --------------------- 3
1-2. Servicing Precautions ----------------- 5
1-3. Precautions for Electrostatically

Sensitive Devices(ESDs) ---------------- 6

2. Specifications

------------------------------ 7

3. Description of Controls

----------------- 9

4. Exploded View

----------------------------- 10

5. Alignment and Adjustments

---------- 12
5-1. Preadjustment -------------------------- 12
5-2. Factory/Service Mode ---------------- 12
5-3. Other Adjustments --------------------- 16

6. Using Devices and Description

------20
6-1. Main Signal Processor(TDA8842) --20
6-2. Vertical Output(TDA8351) ----------- 24
6-3. Video Output Amplifier

(TDA6101Q) -------------------------------- 25
6-4. Audio Output Amplifier(KA2201) --- 26
6-5. Power(STR-F6656) -------------------- 27
6-6. Video Select switch(CD4053BE) --- 28
6-7. Audio Select switch(CD4066BP) --- 28

7. Technical Study(SMPS Operation)

-- 29

7-1. VIN terminal(pin 4)

: Start-up circuit ---------------------------- 29

7-2. OCP/F.B. terminal(pin 1)

: Oscillator and constant voltage
control circuit -------------------------------- 31

7-3. OCP/F.B. terminal(pin 1)

OCP circuit ---------------------------------- 33
7-4. Drive circuit -------------------------------34
7-5. Latch circuit -------------------------------34
7-6. Thermal shutdown circuit -------------35
7-7. Overvoltage protection circuit ------- 35

8. Trouble Shooting

------------------------- 36
8-1. No Power -------------------------------- 36
8-2. No Raster -------------------------------- 37
8-3. No Sound -------------------------------- 38

9. Block Diagram

----------------------------- 39

10. Pcb Layout

-------------------------------- 40

11. Parts List

----------------------------------- 42

12. Circuit Diagram

--------------------------- 47

CONTENTS

2

1. Precautions

Follow these safety, servicing and ESD precautions to prevent
damage and protect against potential
hazards, such as electrical shock and X-rays.

1-1. Safety Precautions

1. Be sure that all of the built-in protective devices are replaced.
Restore any missing protective shields.

2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices,
including

nonmetallic control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which people-particularly children-might
insert fingers and contact dangerous voltages. Such opening include the spacing between
the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and impro­perly fitted back covers.
If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an
abnormality exists that must be corrected before the unit is returned to the customer.

4. Leakage Current Hot Check (Figure 1-1)
Warning Do not use an isolation transformer during this test. Use a leakage current
tester or a metering system that complies with International Electrotechnical Commission

65.(IEC 65)

3

ALSO TEST WITH
PLUG REVERSED

POWER
CORD

TEST ALL

EXPOSED METAL

SURFACES

EARTH

GROUND

READING SHOULD NOT

BE ABOVE

<0.7mA PEAK AC<2mA DC.

FIGURE 1-1
AC LEAKAGE TEST

DEVICE
UNDER
TEST

LEAKAGE

CURRENT

TESTER

5. With the unit completely reassembled, plug the AC line cord directly to the power outlet.
With the unit s AC switch first in the ON position and then OFF, measure the current
between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal
parts, including

handle brackets, metal cabinets, screwheads and control shafts.
The current measured should not exceed < 0.7 mA peak AC < 2mA DC.
Reverse the power-plug in the AC outlet and repeat the test.

6. X-ray Limits
The picture tube is especially designed to prohibit X-ray emissions.
To ensure continued X-ray protection, replace the picture tube only with one that is the
same type as the original. Carefully reinstall the picture tube shields and mounting
hardware these also provide X-ray protection.

7. High Voltage Limits
High voltage must be measured each time servicing is done on the +B, horizontal
deflection or high voltage circuits.

8. High voltage is maintained within specified limits by close-tolerance, safety-related
components and adjustments. If the high voltage exceeds the specified limits, check
each of the special components.

9. Design Alteration Warning
Never alter or add to the mechanical or electrical design of this unit.
Example Do not add auxiliary audio or video connectors. Such alterations might
create a safety hazard. Also, any design changes or additions will void the
manufacturer s warranty.

10. Components, parts and wiring that appear to have overheated or that are otherwise

damaged should be replaced with parts that meet the original specifications. Always
determine the cause of damage or overheating, and correct any potential hazards.

11. Observe the original lead dress, especially near the following areas

Antenna wiring, sharp edges, and especially the AC and high voltage power supplies.
Always inspect for pinched, out-of-place, or frayed wiring.
Do not change the spacing between components and the printed circuit board. Check
the AC power cord for damage. Make sure that leads and components do not touch
thermally hot parts.

12. Picture Tube Implosion Warning

The picture tube in this receiver employs

"

integral implosion"protection.
To ensure continued implosion protection, make sure that the replacement picture tube
is the same as the original.

13. Do not remove, install or handle the picture tube without first putting on shatterproof
goggles equipped with side shields.
Never handle the picture tube by its neck. Some

"

in-line"picture tubes are equipped
with permanetly attached diflection yoke do not try to remove such "permanently
attached

"

yokes from the picture tube.

4

14. Product Safety Notice
Some electrical and mechanical parts have special safety-related characteristics which
might not be obvious from visual inspection.
These safety features and the protection they give might be lost if the replacement
component differs from the original-even if the replacement is rated for higher voltage,
wattage, etc.
Components that are critical for safety are indicated in the circuit diagram by
shading( )
Use replacement components that have the same ratings, especially for flame
resistance and dielectric strength specifications. A replacement part that does not have
the same safety characteristics as the original might create shock, fire or other hazards.

1-2. Servicing Precautions

Warning 1 First read the "Safety Precaution"section of the manual.

If some unforeseen circumstance creates a conflict between the servicing and
safety precautions, always follow the safety precaution.

Warning 2

An electrolytic capacitor installed with the wrong polarity might explode.

1. Servicing Precautions are printed on the cabinet. Follow them.

2. Always unplug the unit

s AC power cord from the AC power source before attempting

to

(a) Remove or reinstall any component or assembly, (b) Disconnect an electrical

plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety.
An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped

to prevent contact with thermally hot components.
Reinstall all such elements to their original position.

4. After servicing, always check that the screws, components and wiring have been

correctly reinstalled. Make sure that the portion around the serviced part has not been
damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts

(examples metal panels,. input terminals).

6. Insulation Checking Procedure

Disconnect the power cord from the AC source and
turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of
the AC plug.
The insulation resistance between each blade of the AC plug and accessible conductive
parts (see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any
of its assemblies) unless all solid-state heat sinks are correctly installed.

5

8. Always connect a test instrument s ground lead to the instrument chassis ground before
connecting the positive lead always remove the instrument s ground lead list.

1-3. Precautions for Electrostatically Sensitive Devices (ESDs)

1. Some semiconductor ("solid state") devices are easily damaged by static electricity.
Such some components are called Electrostatically Sensitive Devices (ESDs) examples
include integrated circuits and some field-effect transistors. The following techniques will
reduce the occurrence of component damage caused by static electricity.

2. Immediately before handling any semiconductor components or assemblies, drain the
electrostatic charge from your body by, touching a known earth ground. Alternatively,
wear the discharging wrist-strap device. (Be sure to remove it prior to applying power­this is an electric shock precaution)

3. After removing an ESD-equipped assembly, place it on a conductive surface such as
aluminum foil to prevent accumulation of electrostatic charge.

4. Do not use freon-propelled chemicals. These can generate electrical charges that
damage ESD

S.

5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDS.

6. Use only an anti-static solder removal device. Many solder removal devices are not rated
as "anti-static" these can accumulate sufficient electrical charge to damage ESDS.

7. Do not remove a replacement ESD front its protective package until you are ready to
install it. Most replacement ESDs are packaged with leads that are electrically shorted
together by conductive foam, aluminum foil or other conductive materials.

8. Immediately before removing the protective material from the leads of a replacement
ESD, touch the protective material to the chassis or circuit assembly into which the
device will be installed.

9. Minimize body motions when unpackaged replacement ESDs. Motion, such as brushing
clothes together, or lifting a foot from a carpeted floor can generate, enough static
electricity to damage an ESD.

6

2. Specifications

MODEL : CT21AF

DESCRIPTION : 21 INCH CCTV WITH 2 CH CAMERA INPUT &

HORIZONTAL RESOLUTION 450 LINES

1) SPECIFICATIONS

COLOR SYSTEM : NTSC 3.58 / PAL-B
POWER INPUT : AC 100-240V(50/60 Hz)
POWER CONSUMPTION : 67W
VIDEO IMPEDANCE : 75Ohm BNC
SOUND OUTPUT : 1.0

0.2W 8 Ohm

SPEAKER SIZE : 70mm

40mm

VIDEO OUTPUT LEVEL : 1.0V

p-p 10% at 75 Ohm

VIDEO INPUT LEVEL : 1.0V

p-p 10% at 75 Ohm

AUDIO OUTPUT LEVEL : RCA JACK TYPE

300

50mVrms

AUDIO INPUT LEVEL : RCA JACK TYPE

300

50mVrms
SOUND DISTORTION : Less Than 10%
HUM : Less Than 10mVrms
BUZZ : Less than 200mV

p-p

2) FEATURES

BLUE BACK AT NO SIGNAL
PROTECTION CIRCUIT FOR X-RAY
S-VHS INPUT
VIDEO THROUGH-OUT

3) CONTROLS & SWITCHES

MAIN AC POWER S/W : PUSH LOCK FRONT
PICTURE CONTROL : ROTARY FRONT
(CONTRAST, BRIGHTNESS, TINT, COLOR, SHARPNESS)
VOLUME CONTROL : ROTARY FRONT
S-VHS/CAMERA SELECTION : TACT SWITCH FRONT
VIDEO IMPEDANCE : SLIDE SWITCH BACK

7

4) LIGHTINGS

INDICATOR : POWER ON (GREEN)

: VIDEO 1 (GREEN)
: VIDEO 2 (GREEN)
: Y/C (GREEN)

5) JACK & TERMINALS

4 BNC : VIDEO INPUT/OUTPUT
4 AUDIO RCA : AUDIO INPUT/OUTPUT
S-VHS MINI DIN : S-VHS INPUT
AC INLET : AC INPUT

6) ACCESSORIES

WARRANTY CARD
OWNER’S MANUAL
POWER CORD

7) CABINET SIZE

476(W) 432(H) 468(D)

8) PACKING

BOX OUT : 566(W) 555(H) 562(D)
Q’TY SET PER 40 FOOT FCL : 336 SETS
Q’TY SET PER 20 FOOT FCL : 160 SETS

9) REMARKS

WEIGHT : 26Kg

8

9

3. Description of controls

WARNING : TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS

CCTV TO RAIN OR MOISTURE

Front View Side View

Rear View

1. TINT

2. SHARPNESS

3. COLOR

4. BRIGHTNESS

5. CONTRAST

6. VOLUME

7. VIDEO 1

8. VIDEO 1 LED LAMP

9. VIDEO 2

10. VIDEO 2 LED LAMP

11. Y/C

12. Y/C LED LAMP

13. POWER BUTTON

14. POWER LED LAMP

15. POWER INLET

16. IMPEDANCE (SLIDE S/W)

17. IMPEDANCE (SLIDE S/W)

18. CHANNEL 1 IN(BNC)

19. CHANNEL 2 IN(BNC)

20. CHANNEL 1 OUT(BNC)

21. CHANNEL 2 OUT(BNC)

22. Y/C IN(DIN)

23. CHANNEL 1 AUDIO IN(RCA)

24. CHANNEL 2 AUDIO IN(RCA)

25. CHANNEL 1 AUDIO OUT(RCA)

26. CHANNEL 2 AUDIO OUT(RCA)

10

4. EXPLODED VIEW

NO ITEM

Q’TY

1
2
3
4
5
6
7

8
9

10
11
12
13
14
15
16
17
18
19

20
21
22
23
24
25
26
27
28
29
30
31

32
33

FRONT PANEL ASS’Y
SPEAKER SYSTEM
SCREW BTB 3

10
KNOB, BLOCK
KNOB, POWER
BRACKET, POWER
SCREW PB 3 0.5 6

SCREW BTB 3 10
POWER S/W, MTR

CONTROL, MONITOR
SCREW BTB 3 10
CPT ASS’Y
BRACKET, LEFT
BRACKET, RIGHT
SCREW HTTBW 6 30
KNOB, VOLUME ASS’Y
BOTTOM COVER
RUBBER FOR LEG
SCREW BTBW 3

12

SCREW BTB 4

12
MAIN, CCTV
SCREW BTBW 3

12

SCREW BTB 4

12
BACK PANEL ASS’Y
BACK BOARD
SCREW BTB 3 10
SCREW BTBW 3 12
SCREW BTB 4 12
TOP COVER
SCREW BTTB 4 8

BRACKET, REAR
SCREW BTTS 3 8
SCREW PBTB 3

12

1
1
2
1
1
1
2

2
1

1
7
1
1
1
4
6
1
4
4

4
1
3
2
1
1
6
2
1
1
6

1
7
5

11

5. Alignment and Adjustments

5-1. Preadjustment

5-1-1. Factory Mode

1. Do not attempt these adjustments in the VIDEO mode.

2. The Factory Mode adjustments are necessary when either the EEPROM(Q002) or the CPT
is replaced.

3. Do not tamper with the "Adjustment" screen of the Factory Mode menu. The screen is intended

only for factory use.

5-1-2. When EEPROM (Q002) is replaced

1. When Q002 is replaced all adjustment data revert to their initial values. It is necessary to re­program this data.

2. After Q002 is replaced, warm up the CCTV SET for 10 seconds.

5-1-3. When CPT is replaced

1. Make the following adjustments after setting up purity and convergence:
White Balance
Vertical center
Vertical size
Horizontal size

5-2. Factory / Service Mode

5-2-1. Procedure for the "Adjustment" Mode

1. This mode uses the standard remote control. The Factory (Service) Mode is activated by
pressing the "Factory" key on the remote control.

2. The Factory Mode will be displayed. The Factory Mode has four components: Screen adjustment,
Position adjustment, White balance, and Volume Adjust.

3. Access the Adjustment Mode by pressing the VOLUME keys (Up or Down). The adjustment
Parameters adjusted are listed in the accompanying table, and they are selected by pressing
the PROGRAM keys (Up or Down).

4. The VOLUME keys increase or decrease the adjustment values, which are stored in the non­volatile memory as soon as the adjustment is cancelled.

5. Cancel the Adjustment Mode by pressing the OUT CONDITION key.

12

13

5-2-2. Service Adjustment Parameter

Main Adjustment Parameter

FUNCTION

OSD

ABBREVIATION

RANGE INITIAL DATA

SCREEN VOLTAGE
INCH OPTION
HORIZONTAL SHIFT
VERTICAL AMPLITUDE
VERTICAL SHIFT
VERTICAL SLOPE
RED CUTOFF
GREEN CUTOFF
BLUE CUTOFF
VOLUME OUTPUT

Screen ADJ

Inch

Hrs

Height

VRS

VS

R
G
B

Volume Adjust

---

21
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step
0 ~ 63 Step

---

21 inch

50
40
33
32
32
32
32
47

5-2-3. Factory Adjustment Parameter

FUNCTION OSD DESCRIPTION

INITIAL

DATA

IF Sensitivity

Modulation standard

Video mute switch

Search tuning mode

Video ident mode

AFC Window
PLL demodulator

frequency adjust
X-tal definition

Synchronisation

Phase 1 time constant

Video ident mode

Long blanking mode

Interlace

IFS

MOD

VSW

STM

VIM

AFW

LFA

XA

XB
POC
FOA

FOB

VID

LBM

DL

Off : Normal sensitivity
On : Maximum gain reduced by 20dB

Off : Negative modulation
On : Positive modulation

Off : Normal operation
On : IF video signal switched off

Off : Normal operation
On : Reduced dynamic sensitivity of

coincidence detector

Off : Ident coupled to CVBS

INT

On : Ident coupled to selected CVBS or Y/C
Off : Nominal window

On : Enlarged window
Off : Normal IF frequency

On : Frequency shift for L standard
0,0 : 3.6MHz, 3,6MHz, 0,1 : 3.6MHz, Open

1,0 : Open, 3,6MHz, 1,1 : 3.6MHz, 4.4MHz
Off : Active

On : Not active
0,0 : Normal, 0,1 : Slow

1,0 : Slow/Fast, 1,1 : Fast
Off : Phase 1 loop switched on and off

On : Not active
Off : Adapted to standard (50 or 60Hz)

On : Fixed in accordance with 50Hz standard
Off : Interlace

On : De-interlace

Off

Off

Off

Off

Off

Off

Off

1,1

Off

Normal

Off

Off

Off

14

Forced field frequency

Vertical divider mode

Vertical overscan

Vertical scan disable

Helper output blanking

Enable vertical guard

Service blanking

Cathode drive level

Auto kine biasing

Automatic start up

RGB Blanking

Blue stretch

Black stretch

Enable fast blanking

Gain of luminance channel

Y-delay adjustment

Input source select

Fixed audio volume

Sound mute

Auto. volume leveling

Auto. Color limiting
Chroma bandpass

centre frequency

FORF
FORS

NCIN

OSO

VSD

HOB

EVG

SBL

CL 0

1 2

AKB

AST

RBL

BLS

BKS

IE1

GAI

YD
0123

IN

ABC

FAV

SM

AVL

ACL

CB

0,0 : Auto 60Hz, 0,1 : 60Hz forced
1,0 : Keep last detected freq., 1,1 : Auto 50Hz

Off : Normal
On : Switched to large search window

Off : Switch-off undefined
On : Switch-off in vertical overscan

Off : Vertical scan active
On : Vertical scan disabled

Off : Not active
On : Active

Off : Not active
On : Active

Off : Not active
On : Active

0 0 0 : 57V, 0 0 1 : 63V, 0 1 0 : 70V, 0 1 1 : 77V
1 0 0 : 84V, 1 0 1 : 91V, 1 1 0 : 99V, 1 1 1 : 107V

Off : Active
On : Not active

Off : Automatic mode
On : Switch on under control of u-processor

Off : Not active
On : Active

Off : Not active
On : Active

Off : Not active
On : Active

Off : Not active
On : Active

Off : Normal gain
On : High gain

0 0 0 0 : 0ns, 0 0 1 0 : 40ns, 0 1 0 0 : 80ns
0 1 1 1 : 12ns, 1 0 0 0 : 160ns, 1 0 1 1 : 200ns
1 1 0 0 : 240ns, 1 1 1 0 : 280ns, 1 1 1 1 : 320ns

0 0 0 : Int CVBS + audio
0 0 1 : Ext CVBS + audio
0 1 0 : Y/C + Ext audio
0 1 1 : CVBS3 + Ext audio
1 0 0 : Y/C + Int audio
1 1 0 : Y/C + Ext audio

Off : Normal Volume control
On : Audio level output fixed

Off : Not active
On : Active

Off : Not active
On : Active

Off : Not active
On : Active

Off : Fsc
On : On : 1.1

Fsc

1,0

Off

On

Off

Off

Off

Off

0 0 0

Off

Off

Off

Off

On

Off

Off

1 1 1 0

0 0 1

Off

On

On

On

Off

15

Enable ext. comb filter

Bypass chroma delay line

Matrix selection

Color decoder mode

Vertical S correction

Stand by

Overvoltage protection
detection

CMB

BPS

MAT

CM
012

SC

STB

PRD

Off : Disabled
On : Enabled

Off : Active
On : Bypassed

Off : Adapted to standard
On : Forced to PAL matrix

0 0 0 : Automatic
0 0 1 : Forced X-tal pin 34 PAL/NTSC
0 1 0 : Forced X-tal pin 34 PAL
0 1 1 : Forced X-tal pin 34 NTSC
1 0 0 : Forced X-tal pin 35 PAL/NTSC
1 0 1 : Forced X-tal pin 35 PAL
1 1 0 : Forced X-tal pin 35 NTSC
1 1 1 : Forced SECAM

63 Steps
Off : Stand by

On : Normal
Off : Overvoltage detection

On : Overvoltage detection and stop horizontal
drive(protection)

Off

Off

Off

0 0 0

10

On

On

Input function
(Write)

Control 0
Control 1
Hue HUE
Horizontal shift HSH
E-W amplitude EW
E-W parabola/width PW
E-W corner parabola CP
E-W trapezium TC
Vertical slope VS
Vertical amplitude VA
S-Correction SC
Vertical shift VSH
White point Red WPR
White point Green WPG
White point Blue WPB
Peaking PEAK
Brightness BRI
Saturation SAT
Contrast CON
AGC Take over point TOP
Volume control VOL
IF Frequency selection IFFR
Vertical zoom VX
Vertical scroll VSC
Control 2
Control 3
Control 4
Control 5

00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
10
11
12
13
14
15
16
17
18
19
1A
1B

INA
FORF
AVL/HBL
VIM
0
0
0
0
NCIN
VID
HCO
SBL
0
0
MAT
0
RBL
IE1
AFW
MOD
SM
IF A
0
0
OSO
HOB
YD3
0

INB
FORS
AKB
GAI
0
0
0
0
STM
LBM
EVG
PRD
0
0
0
0
COR
IE2
IFS
VSW
FAV
IFB
0
0
VSD
BPS
YD2
0

INC
DL
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
A5
IFC
A5
A5
CB
ACL
YD1
0

BCO
STB
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
A4
0
A4
A4
BLS
CMB
YD0
0

FOA
POC
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
A3
0
A3
A3
BKS
AST
DS
0

FOB
CM2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
A2
0
A2
A2
CS1
CL2
DSA
0

XA
CM1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
A1
0
A1
A1
CS0
CL1
FFI
0

XB
CM0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
A0
0
A0
A0
BB
CL0
EBS
FCO

D7

D6

D5 D4 D3 D2 D1 D0

Sub
addr.
(hex)

Data bits

16

5-2-4. Outcondition

The Outcondition Mode is used during factory inspection.

Function Reset

1. System Auto

5-3. Other Adjustments

5-3-1. General Alignment Instructions

1. Usually, a color CCTV needs only slight touch-up adjustment upon installation. Check the
basic characteristics such as height, horizontal and vertical sync and focus.

2. Observe the picture for good black and white details. There should be no objectionable
color, shading if color shading is present, perform the purity and convergence
adjustments described below.

3. Use the specified test equipment or its equivalent.

4. Correct impedance matching is essential.

5. Avoid overload. Excessive signal from a sweep generator might overload the front-end of
the CCTV SET. When inserting signal markers, do not allow the marker generator to distort
test results.

6. Connect the CCTV SET only to an AC power source with voltage and frequency as

specified on the backcover nameplate.

7. Do not attempt to connect or disconnect any wires while the CCTV SET is turned on.
Make sure that the power cord is disconnected before replacing any parts.

8. To protect against shock hazard, use an isolation transformer.

5-3-2. Automatic Degaussing

A degaussing coil is mounted around the picture tube, so that external degaussing after
moving the CCTV SET should be unnecessary.
But the receiver must be properly degaussed upon installation.
The degaussing coil operates for about 1 second after the power is switched ON. If the set is
moved or turned in a different direction, the power should be OFF for at least 10 minutes.
If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this
happens, use an external degaussing coil. Slowly move the degaussing coil around the
faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to
a distance of about 6 feet before turning power OFF.
If color shading persists, perform the following Color Purity and Convergence adjustments.

17

5-3-3. High V oltage Check

CAUTION There is no high voltage adjustment chassis. The B+power supply should be

+

135 volts (see table 1).

1. Connect a digital voltmeter to the second anode of the picture tube.

2. Turn on the CCTV SET. Set the Brightness and Contrast controls to minimum.

3. Adjust the Brightness and Contrast controls to both extremes.

Ensure that the high voltage does not exceed Maximum High voltage (see table 1) under
any conditions.

Table 1 +B and Maximum High voltage

5-3-4. FOCUS Adjustment

1. Input a cross dot signal.

2. Adjust the tuning control for clearest picture.

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

5-3-5. Screen Adjustment

1. Tune to the ACTIVE channel.

2. Adjust the FACTORY key is pressed on Remote Controller, Factory Mode shows up.

3. Selected OSD color is red.

4. When the VOL+key is pressed, the screen turns to one horizontal line.

5. Adjust SCREEN VR of FBT to make 1 dot bar.

6. After adjustment, once VOL+key is pressed again, it turns to FACTORY Mode.

5-3-6. Purity Adjustment

1. Warm up the receiver for at least 30 minutes.

2. Plug in the CRT deflection yoke. Tighten the clamp screw.

3. Plug the convergence yoke into the CRT and set it as shown in Fig. B-1.

4. Input a black and white signal.

5. Fully demagnetize the receiver by using an external degaussing coil.

6. Turn the CONTRAST and BRIGHTNESS controls to maximum.

7. Loosen the clamp screw holding the yoke. Slide the yoke backward or forward to produce a

vertical green belt. (Fig. B-2)

8. Tighten the convergence yoke.

INCH

21

+

B (Volts)

135

Maximum High Voltage

27 KV

9. Slowly move the deflection yoke forward. Adjust for the best overall green screen.

10. Temporarily tighten the deflection yoke.

11. Produce blue and red rasters by adjusting the-low-light controls.

Check for good purity in each field.

12. Tighten the deflection yoke.

5-3-7. Center Convergence Adjustment

1. Warm up the receiver for at least 30 minutes.

2. Adjust the two tabs of the 4-pole magnets Change the angle between them.

Superimpose the red and blue vertical lines in the center area of the screen.

3. Adjust the BRIGHTNESS and CONTRAST controls for a well-defined picture.

4. Adjust the two tabs of the 4-pole magnets, and change the angle between them.

Superimpose the red and the blue vertical lines in the center area of the screen.

5. Turn both tabs at the same time, keeping the angle constant, and superimpose the red and

blue horizontal lines in the center of the screen.

6. Adjust ing two-tabs of 6-pole magnets to superimpose the red and blue lines onto the green.

Adjusting the angle affects the vertical lines, and rotating both magnets affects the horizontal
lines.

7. Repeat adjustments 2-6, if necessary.

8. Since the 4-pole and 6-pole magnets interact, the dot movement is complex(fig B-3).

18

FIG. B-1 CONVERGENCE MAGNET ASSEMBLY

6 Pole Magnet

4 Pole Magnet

2 Pole Magnet

2 Pole
PURITY

4 Pole
CONVERGENCE

6 Pole
CONVERGENCE

YOKE
CLAMP
SCREW

Clamper
Screw

19

5-3-8. White Balance Adjustment

1.

On Factory Mode, select number 3.

2. Press FACTORY key again to return to Factory Mode screen and select 1. White Balance.

3. In case of Screen adjustment, the color of horizontal bar can be used as a standard one and

use other two colors to adjust W/B.(AC 100 equipment used)

FIG. B-2 CENTER CONVERGENCE ADJUSTMENT

FIG. B-3 CENTER CONVERGENCE ADJUSTMENT

Vertical Green Belt

ADJUST

BLUE

BLUE

BLUERED RED

RED

BLUE/RED

GREEN

4-POLE MAGINETS MOVEMENT 6-POLE MAGINETS MOVEMENT

NOTE The purpose of this procedure is to optimize the picture tube to obtain

good black and white picture at all brightness levels while at the same
time achieving maximum usable brightness. Purity and convergence
adjustment must be processed in advance. Press the OUTCONDITION
key on the remote control unit.

6. Using Devices and Description.

6-1. Main Signal Processor (TDA8842)

6-1-1. Feature

The following feature are available in all IC’S :

Multi-standard vision IF circuit with PLL demodulator
Alignment-free multi-standard FM sound demodulator (4.5MHz to 6.5MHz)
Flexible source selection with CVBS switch and Y(CVBS)/C input so that a comb filter can

be applied.
Integrated chrominance trap circuit
Integrated luminance delay line
Asmmetrical Peaking in the luminance channel with a noise coring function
Integrated chroma band pass filter with switchable center frequency
RGB control circuit with "Continuous Cathode Calibration" and white point adjustment
Possibility to insert a "Blue Back" option when no video signal is available
Horizontal synchronization with two control loops and alignment - free horizontal oscillator
Vertical count-down circuit
Vertical driver optimized for DC-coupled vertical output stages
I2C-bus control of various functions

20

21

6-1-2. Pinning and Description

PIN DESCRIPTION

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28

Sound IF input
External audio input
IF VCO tuned circuit 1
IF VCO tuned circuit 2
IF-PLL loop filter
IF video output
Serial clock input
Serial data input/output
Bandgap decoupling
Chrominance input
External CVBS
Main supply voltage 1 (+8V)
Internal CVBS input
Ground 1
Audio output
SECAM PLL decoupling
External CVBS input
Black-current input
Blue output
Green output
Red output
Beam current limiter input
Red input for insertion
Green input for insertion
Blue input for insertion
RGB insertion input
Luminance input
Luminance output

PIN DESCRIPTION

29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

(B-Y) signal output
(R-Y) signal output
(B-Y) signal input
(R-Y) signal input
Subcarrier reference output

3.58MHz X-tal

4.43NHz X-tal
Loop filter phase detector
2ndsupply voltage 1 (+8V)
CVBS-1 output
Decoupling digital supply
Horizontal output
Flyback input/sandcastle output
Phase-2 filter
Phase-1 filter
Ground 2
East-west drive output
Vertical drive B output
Vertical drive A output
IF input 1
IF input 2
EHT/overvoltage protection input
Vertical sawtooth capacitor
Reference current input
AGC decoupling capacitor
Tuner AGC output
Audio deemphasis
Decoupling sound demodulator

22

6-1-3. Block Diagram

I2C-bus controlled NTSC/PAL CCTV
Processors TDA884X/5X-N1 series

6-1-4. Function Description

1. Audio

Alignment free multi standard PLL audio demodulator (4.5 to 6.5 MHz)
Volume control

2. Video

Integrated fixed luminance delay line
Integrated chroma trap (auto calibrated)
Integrated chroma bandpass filters with switchable center frequency (auto calibrated)
Asymmetrical peaking circuit in the luminance channel with switchable noise coring
function
Black stretching of non standard CVBS or luminance signals, switchable via IIC-bus

3. RGB

RGB control (brightness, contrast, saturation)
Improved black current stabilization (continuos cathode calibration)
White point adjustment
Blue stretch which offsets colors near white to blue
Option to insert "blue back" when no video signal is available

4. Input/Output

Flexible video source select with CVBS input for the internal signal and two external video
inputs (one switchable for CVBS or Y/C)
The output signal of the video source select is externally available (also as CVBS when Y/C
Y/C input is used)
External audio input
Linear RGB input with fast blanking

5. Synchronization and Deflection

Horizontal synchronization with two control loops and alignment free horizontal oscillator
Slow start and slow stop of the horizontal drive output to enable low stress start-up and
Switch-off from the line circuit at nominal line supply voltage.
Vertical count-down circuit for stable behavior with provisions for non-standard signals
Vertical geometry control
Vertical drive optimized for DC coupled vertical output stages

23

24

6-2. V ertical Output (TDA8351)

6-2-1. Feature

Highly efficient fully DC-coupled vertical output bridge circuit
Vertical flyback switch
Protection against:

Short-circuit of the output pins (7 and 4)

Short-circuit of the output pins to Vp
Temperature (thermal) protection
High EMC immunity because of common mode inputs

6-2-2. Pinning and Description

PIN DESCRIPTION

1

2

3

4

5

6

7

8

9

Input power stage (positive)
Input power stage (negative)
Operating supply voltage
Output voltage B
Ground
Input flyback supply voltage
Output voltage A
Guard output voltage
Input feedback voltage

6-2-3. Block Diagram

25

6-3. Video Output Amplifier (TDA6101Q)

6-3-1. Feature

Bandwidth : 9MHz typical at 100Vp-p

Slewrate : 1700 V/us

Only one supply voltage

Protection against ESD

Black-current measurement output for automatic black current stabilization

Internal reference voltage

Thermal protection

Defined switch-off behaviour

6-3-2. Pinning and Description

PIN DESCRIPTION

1
2
3
4
5
6
7
8
9

Non-inverting voltage input
Supply voltage low
Inverting voltage input
Ground
Black current measurement output
Supply voltage high
Cathode transient voltage output
Cathode DC voltage output
Feedback voltage output

6-3-3. Block Diagram

26

6-4. Audio Output Amplifier (KA2201)

6-4-1. Feature

Wide operating supply voltage : Vcc=3V~14V.

Medium output power.

Low quiescent circuit current.

Good ripple rejection

Minimum number of external parts required.

6-4-2. Pinning and Description

8 7

1 4

6 5

2 3

Pin Description

Pin Description

1
2
3
4
5
6
7
8

CB

NF

INPUT

GND

OUTPUT

Vcc

BOOTSTRAP

RIPPLE

27

6-5. Power (STR-F6656)

6-5-1. Feature

Small SIP full mold package

Guaranteed avalanche energy :

Makes it possible to simplify surge absorbing circuit

Many protection functions :

Pulse-by-pulse overcurrent protection

Overvoltage protection with latch mode

Thermal protection with latch mode

6-5-2. Pinning and Description

PIN DESCRIPTION

1
2

3
4
5

Over current/Feedback terminal
Source terminal

Drain terminal
Power supply terminal
Ground terminal

DESCRIPTION

Input of overcurrent detection signal
and constant voltage control signal

MOS FET source
MOS FET drain
Input of power supply for control circuit
Ground

6-5-3. Block Diagram

28

6-6. Video Select switch (CD4053BE)

6-6-1. Feature

SIP-16 Pin

Triple 2-Channel

Wide range of digital and analog signal levels digital 3 to 20V, analog to 20Vp-p

Low ON resistance : 125Ω(typ.)

6-6-2. Pinning and Description

PIN DESCRIPTION

1
2
3
4
5
6
7
8

Y1 Input
Y0 Input
Z1 Input
Z Output
Z0 Input
INH
VEE
Ground

PIN DESCRIPTION

9
10
11
12
13
14
15
16

Z Switch
Y Switch
X Switch
X0 Input
X1 Input
X Output
Y Output
Vcc

X Switch

L
H
H

Y Switch

H
L
H

OUTPUT

INPUT X
INPUT Y
INPUT Z

6-6-3. Control

Z Switch

H
H
L

6-7. Audio Select switch (CD4066BP)

6-7-1. Feature

SIP-14 Pin
Quiad Bilateral Switches
Low ON resistance : 120Ω(typ.)

6-6-2. Pinning and Description

PIN DESCRIPTION

1
2
3
4
5
6
7

Y0 IN/OUT Terminal
Z0 IN/OUT Terminal
Z1 IN/OUT Terminal
Y1 IN/OUT Terminal
E1 Enable Input
E2 Enable Input
VSS GROUND

PIN DESCRIPTION

8

9
10
11
12
13
14

Y2 IN/OUT Terminal
Z2 IN/OUT Terminal
Z3 IN/OUT Terminal
Y3 IN/OUT Terminal
E3 Enable Input
E0 Enable Input
VDD

AUDIO 1

AUDIO2

IN PUT

Y1
Y0

CONTROL SWITCH

E1 HIGH
E0 HIGH

6-7-3. Control

OUT PUT

Z1
Z0

29

7. Technical Study (SMPS Operation)

7-1. VIN terminal(pin 4) : Start-up circuit

The start-up circuit starts and stops the operation
of the control IC by detecting the voltage appearing
at the VIN terminal (pin 4).
The power supply (VIN terminal input) of the control
IC uses a circuit as shown in Fig. 1.
At start-up of the power supply, C2 is charged
through the start-up resistor Rs.
When the VIN terminal voltage reaches 16V
(typical), the control circuit starts operation by the
function of the start-up circuit.
As shown is Fig.2, since the circuit current is
suppressed to 100 Amax.(at VIN=141V, Tc=25 )
until the control circuit starts its operation, Rs can
be of high resistance.

Taking into account the slight increase of the
holding current (400

Amax.) of the latch circuit,
the Rs value shall be determined in a manner
that 500

A or higher current can flow even at the
lowest AC input voltage.
However, if the Rs value is too large, the current
charging C2 after switching on the AC input is
decreased to require longer time for reaching the
operation start voltage.
Therefore, the Rs value shall be examined
together with the C2 value which will be discussed
later.
The V

IN terminal voltage decreases after the control

circuit starts operation.
Therefore, if the C2 value is larger, the voltage drop ratio if the VIN terminal voltage is reduced.
Consequently, even if the drive winding voltage is delayed in rising, the VIN terminal voltage does
not drop to the shutdown voltage to maintain start-up function.
If the capacitance of C2 is too large, time from switch-on of AC input to operation start by C2
charging becomes longer.
In the typical power supply specifications, C2 may be 47 ~ 100

F for start-up.

Fig. 1 start-up circuit

Fig. 2 VIN terminal voltage circuit

current IIN

30

After the control circuit starts its operation, power is
supplied by smoothing and rectifying the voltage of the
drive winding D which is provided in the transformer.
An example of the waveform of the V

IN terminal

voltage is shown in Fig. 3.
The drive winding voltage does not increase to the
set voltage immediately after the control circuit starts
its operation.
Although the V

IN terminal voltage starts decreasing,

the drive winding voltage reaches the set value
before the VIN terminal voltage drops to the shutdown
voltage which is set at such a low voltage as 10V.
Consequently, the control circuit can continue its
operation.
The turn number of the drive winding must be
determined in a manner that the C2 voltage can
be above the shutdown voltage [V

IN(OFF) 11V(MAX) ]

and below the OVP operating voltage [VIN(OVP)

20.5V(MIN) ].

However, in the actual power supply circuit, the
VIN

terminal voltage may vary subject to the secon-

dary side output current, as shown in Fig. 4.

This is because peak charging of C2 is performed
by surge voltage generated instantaneously at
MOS FET due to small circuit current of the IC.
In this case, by adding a resistor with several ohm
to several tens ohm in series with the rectifier diode,
this problem can be eased.
As to the optimal resistance value of the additional
resistor, as the variation ratio of the V

IN terminal

voltage is not same due to the construction of the
transformer used, it must be determined in accor­dance with the transformer actually used.
The variation ratio of the V

IN terminal voltage to the

output voltage becomes worse in proportion to the
worsening of the primary-secondary coupling of the
transformer and the coupling between the drive
winding and output stabilizing winding(winding for
a circuit regulating the constant voltage).
In designing the transformer, the above should be
taken into account.

Fig. 3 Waveform of VIN terminal

voltage at start-up

Fig. 4 Output current Iout - V

IN

terminal voltage

Fig. 5 Stabilized back-up power supply

circuit against output current Iout

31

7-2. OCP/F.B. terminal (pin 1) :

Oscillator and constant voltage control circuit.

The Oscillator makes use of charging and discharging of C1 incorporated in the hybrid IC and
generates pulse signals to determine the OFF-time of the MOS FET.
The constant voltage control of a switch mode power supply is performed by fixing the OFF-time
of the MOS FET (=50

sec.) and changing the ON-time in the PRC(Pulse Ratio Control) operation.
Fig. 6 show how the oscillator works when the hybrid IC operates without control of constant voltage.
When the MOS FET is on, the capacitor C1 is charged to the constant voltage (=6.5V).
On the other hand, voltage drop (VR5) is caused in the OCP/FB terminal(pin 1) by the flow of drain
current across R5. This voltage is the a sawtooth voltage like ID and almost the same voltage as
applied to VR5 is applied to No. 1 terminal.
When the No. 1 terminal voltage reaches the threshold voltage Vth(1)=0.73V, the Comp.1 operates
and the comparator of the internal oscillator is reversed to turn off the MOS FET.
When the MOS FET turn off, charging of C1 is released and C1 starts discharging by the internal
resistor R1.
C1 voltages decrease in accordance with the slope which is determined by the discharging time
constants of C1 and R1.
When C1 voltages decrease to around 3.7V, the oscillator output is reversed again and the MOS
FET turns on.
Then, C1 is quickly charged to around 6.5V.
The MOS FET continues oscillation by repeating this operation.
As described above, the time determined by the slope of VR5(ID) is the ON-time of the MOS FET.
Also, the fixed time determined by C1 and R1 is the OFF-time of the MOS FET. The fixed time is
adjusted at around 50

sec. by function trimming of R1.

Fig. 6 Oscillating operation of switch-mode power supply

32

For the control of the output, the feedback current (FB current) flowing to a photocoupler flows across
R4 and voltage drop VR4 thus caused is added to VR5.
The VR5 voltage (peak value of ID) which is necessary for the inversion of the Comp.1 is controlled
by VR4 (FB current) to change the height of ID peak value and VR4 controls the secondary side output
(current mode control).
R4 has a function of stabilizing the operation at light load.
Normally bias by VR4 increases at light load.
Without R4, R5 increases abnormally due to noise caused by surge current at MOS FET off, resulting
in wrong operation of Comp.1.
In order to prevent this trouble, the OCP/FB terminal (pin 1) is connected by R4 to the ground at low
impedance(560 ), while the MOS FET is off.
Then, the impedance of the OCP/FB terminal is reduced around by 1/2 (when R4=680 ) and the
bias of R4 is reduced by around 1/2 at the moment of turning on.
Thus, C5 absorbs noise caused at turn-on of the MOS FET.
In the conventional M6540 series, the photocoupler varies the slope of charging time until reaching the
threshold voltage Vth(1)=0.73V, but in F6500 series, DC bias control is used.

Fig. 7 Oscillating operation at constant voltage control

33

7-3. OCP/F.B terminal (pin 1) OCP circuit

This is a pulse-by-pulse overcurrent protection circuit
which detects the peak of the peak of the drain current of
the MOS FET in every pulse and reverses the oscillator
output.
Fig. 7 shows the overcurrent detection circuit.
The MOS FET drain current is detected by inputting the
voltage drop of R5 connected between the source

terminal(pin 2) of the MOS FET and the GND terminal
(pin 5) into the OCP/FB terminal.
Fig. 8 shows the output characteristics of the secondary side at the time when the overcurrent

protection circuit operates due to the overload of the secondary side.
When the output voltage drops in the overload condition, the drive winding voltage of the primary
side also goes down proportionally, and the V

IN terminal voltage drops below the shutdown voltage

to stop the operation. In this case, as the circuit current also decreases simultaneously, the V

IN

terminal voltage increases again and the circuit operates intermittently by restoring the operation
start voltage. However, if there are a lot of output windings, even if overloaded output voltage drops,

the primary winding voltage may not drop so much and the operation may not be intermittent.
In STR-F6500 series, as the drain current of the MOS FET is detected for overcurrent protection,

the output power becomes high as the input voltage becomes high as shown in Fig. 8.
In order to prevent this high power, it is effective to add as shown if Fig. 9 a circuit by applying bias

which is in proportion with input voltage.
There are two advantages in providing this additional circuit.

(1) The drain current of the MOS FET can be suppressed to low level, when the input voltage

is high, therefore voltage stress to the MOS FET at start-up or overload can be reduced by
reducing surge voltage produced by the transformer.

(2) Current stress to the secondary side rectifier diode can be reduced by limiting the output

power in a certain degree.

Fig. 8 Power supply output

overload characteristic

Fig. 9 Compensation circuit of overcurrent protection by input voltage

RA = 680

1Dpeak(MAX) - 1Dpeak(MIN)

VIN(DC)MAX - VIN (DC)MIN

1Dpeak(MAX)

0.73

RB =

VIN(DC)MIN - (6.8 + 0.73)

RA

(6.8 + 0.73)

7-4. Drive circuit

This circuit charges and discharges the capacitance
between the gate and the source of the power MOS
FET by receiving pulses from the oscillator. As shown
in Fig.10, the basic circuit configuration is totem-pole
type connection of transistors and the maximum source

current is 0.2A and the maximum sink current is 0.3A.
As this current can sink even when the V

IN voltage is

lower than the shutdown voltage, the drive circuit turns
off the MOS FET without fail.

7-5. Latch circuit

The latch circuit is a circuit which keeps an output from the oscillator low and stops operation of
the power supply when overvoltage protection(OVP) and thermal shutdown(TSD) circuits are in

operation. As the sustaining current of the latch circuit is 400

A maximum when the VIN terminal
voltage is 8.5V, the power supply circuit sustains the OFF-state as long as the current of 400 A
minimum flows to the VIN terminal from the start-up resistor.

In order to prevent a malfunction caused by noise, etc., delay time is provided by C2 incorporated
in the hybrid IC and therefore, the latch circuit operates when the OVP or TSD circuit is in opera­tion or and external signal input is provided for 10

sec. or longer.

In addition, even after the latch circuit start operating, the constant voltage regulator(Reg) circuit is
in operation and the circuit current is at a high level. As a result, the V

IN terminal voltage rapidly

decreases. When the VIN terminal voltage become lower than the shutdown voltage (10V typ), it
starts increasing as the circuit current is below 400 A. When it reaches the operation start voltage
(16V typ), the VIN terminal voltage decreases as the circuit current increases again.

When the latch circuit is on, the V

IN terminal

voltage increases and decreases within the range
from 10V(typ) to 16V(typ) and is prevented from
abnormally increasing. Fig. 11 shows and
example of the VIN terminal voltage waveform
when the latch circuit is in operation.

Cancellation of the latch circuit is done by
decreasing the V

IN terminal voltage blow 6.5V.

Usually the power supply can be restarted by
shutting down and an AC input to the power
supply once.

34

Fig. 10 Drive circuit

Fig. 11 Example of V

IN terminal voltage

waveform at latch circuit on

35

7-6. Thermal shutdown circuit

This circuit triggers the latch circuit when the frame temperature of the hybrid IC exceeds 140
(typ).
The temperature is actually sensed by the control IC, but it also works against overheating of the

MOS FET as the MOS FET and the control IC are mounted on the same lead frame.

7-7. Overvoltage protection circuit

This circuit triggers the latch circuit when the VIN voltage exceeds 22.0V(typ).
Although it basically functions as protection of the V

IN terminal against overvoltage, since the VIN

terminal is supplied from the drive winding of the transformer and the voltage is proportional to the
output voltage, it also prevents overvoltage at the secondary output which is caused when the
control circuit is open circuited or by some other event. In this case, the secondary output voltage
at the time when the overvoltage protection is on can be obtained from the following equation.

Vout(OVP)

22.5V(typ)

Output voltage V out in normal operation

V

IN terminal voltage in normal operation

36

8. Trouble Shooting

8-1. No Power

Check the voltage

between + and - of C805

Check the pin 1, 3

of Q807

Check the voltage

between + and - of C822

Check the pin 3 of Q805

1) Check F801
IF F801 is broken, replace it after checking this :
D801, D802, D803, D804

2) Check Q801

Check Q501, Q901, Q902, Q903
Check Q404, Q401

NO

Check Q805, D825, T801
Check Q001 Pin 34

NO

Check Q807, D825

NO

NO

YES

YES

YES

37

Appear Raster

(with Vertical

retrace line)

Check the

voltage between

+ and - C281

Check T461

D281

Check
Q901, Q902, Q903

Check Q501

Increase screen
voltage by turn right
screen volume

Readjust screen
voltage

NO

NO

NO

YES

8-2. No Raster

Heater Voltage is OK but No Raster.

Check the voltage

at pin 19, 20, 21, 26

of Q501

YES

38

8-3. No Sound(Picture OK)

Do the volume control in max before check this routine.

Check the signal waveform

to the pin 2 of Q501

QS02 Check
PV05 Check

NO

Check Q501

NO

YES

Check the signal waveform

to the pin 15 of Q501

Check Voltage

at Q601 Pin 6

YES

Check Q604

Q603
Q601

W661

39

9. Block Diagram

10. PCB LAYOUT (21" "F" CHASSIS)

40

Control PCB

41

PWR S/W

SDDF3PATP011

AC CORD

123

P002
5267-03

M116

2P HARNESS

1

RT09
10K

QA01

CD4066BP

(ACTIVE HIGH)

432

C805
330uF 400V

RT15

750

RT13

750

RT14

750

C809
100pF

C810
1000p 1.6KV

3P HARNESS

MS01

10P HARNESS

VCC

D805

EU1Z

D806
EU1Z

5

L803

BFS3565

MTZ 9.1B

1

2 2

M005

1

2 2

10

9

8

7

6

5

4

3

2

1

14

13

12

11

10

9

8

DA06

C850
3300p

4kV

4

3

10

1

33

9

8

7

6

5

4

3

2

1

MTZJ 9.1B

OPTION RESISTOR

1.R701:VIDEO 2CH

2.R703: VIDEO 1CH

P004

3.R702:TACT SWITCH

5267-02

4.R704:ROTARY VR

R003

R004

P005

47K

CA03
104

Q802
H11A817C

1

2

10K

Q007
KRC112

PIN 4(LOW) : VIDEO 2 SELECT
PIN 4(HIGH) :VIDEO 1 SELECT

PIN 6(LOW) : S-VHS SELECT
PIN 6(HIGH) : VIDEO SELECT

12
13

11
10

(ACTIVE LOW)

L806

BFS3565

5267-03

P003
5267-10

5V5V

DA07

8v

CD4053BE

X0
X1

2

Y0

1

Y1

5

Z0

3

Z1

6

INH
A
B

9

C

T801

KPW-1150

R817
1K

R701

4.7K

(VIDEO 2)

R702

4.7K

(TACT)

Q008
KRC112

C054
104p

C053
104p

C052
104p

C051
104p

C050
104p

SVHS CONTROL

A/V CONTROL

QA03

14

X

15

Y

4

Z

16

VCC

7

VEE

8

GND

C

Y

C820

680pF 2KV

L825

KRFG028

D820

C821

RU3AV1

200V
100u

C825

470pF 500V

D825

C827
1000uF 25V

RGP15J

R815
15K

2

C826
104M

3

200V

GND

1

R703

10

OPT.(VIDEO)

2

OPT.(CONTROL)

3

R704 10

VIDEO SEL.

4

R705

CARS

5

4.7K

S-VHS

R001

6

4.7K

LED(SVHS)

7

LED(VIDEO 1)

8

LED(VIDEO 2)

9

V-CHK0

10

V-CHK1

11

R002

12

10K

TACT SW

13

TINT

14

SHARP

15

COLOR

16

BRIGHT

17

CONTRAST

18

TEST PATTERN

19

QUAD OPTION

20

Q001

KMP87CP38N-3UH6

VIDEO 2

11

2 2

3 3

44

5 5

VIDEO 1

CA04
104

C822
47uF 200V

1

Q803
SE135N

66

7

7

P507

M507

5267-07

7P HARNESS

2

2

P502

1

1

5267-02

P503
5267-03

Y

1

1

2

2

C

3

3

P505

5267-05

1

1

2

2

3

3

4

4

5

5

M505
5P HARNESS

+135V

+12V 1 +5V

M503
3P HARNESS

X-TAL OUT

X-TAL IN

M502
2P HARNESS

ST-BY

MUTE

V-CHK

RESET

TEST

OSD OSC

OSD OSC

BLUE

GREEN

REDGND

R552
10K

CV07
16V
100uF

KIA7808

1

KIA78L05

D116
SLG114B

DT01~DT03 : SLG114B

S006

VIDEO 2

RT06

DT01

3.9K

S007

S-VHS

RT04

DT02

2.2K

S005

VIDEO 1

S003

VOL UP

S002

VOL DOWN

S001

PICTURE

RB06

TINT

10KB

RBO5

SHARPNESS

10KB

RB04
10KB

COLOR

RB03

BRIGHT

10KB

RB02

CONTRAST

10KB

VOLUME

RB01
10KB

LA02

AUDIO

BEAD

IN 2

CA08
100pF

OUT 2

PA01

S-445-09

BNC DC-2700K

BNC DC-2700K

S103

SLIDE(2C-2P)

PV11

BNC DC-2700K

PV10

BNC DC-2700K

S102

SLIDE(2C-2P)

PV15

TCS7648-01-201

4P LARGE

S801

P881

L901

KSB-2186

LA01

AUDIO

BEAD

IN 1

CA07
100pF

OUT 1

VIDEO 2
IN

PV13

VIDEO 2
OUT

PV12

LV04
KRF9229

RV06

75

VIDEO 1

IN

VIDEO 1

OUT

LV03
KRF9229

RV02
75

LA01

S-VHS

10uH

IN

CV09

LA01

100pF

10uH

CV08
100pF

RV03

75

P805

P801

2P LARGE

F801A

3.15A
250V

R891

1M 1/2

C801

0.47uF
275V

L801

DMF-2854

L802

DMF-2854

C802

0.47uF
275V

D803
IN5398

P802

R810

2P PLUG

7 270V

2200pF 2KV

DT03

RT03

2.2K

RT02

RT05

1.3K

6.8K

RT07

RT08

10K

RT01

1.1K

CA01
1uF

RA01
220K

CA02
1uF

RA02
220K

CV10
10uF

50V

DA08

MTZJ 9.1B

CV01

50V 10uF

DA09

MTZJ 9.1B

22uF 25V
SRA

CV06
1000pF

RV04
75

C806
47uF

R805
39K
1/2R

R804
39K
1/2R

C804
2200pF 2KV

D804

IN5398

D801

IN5398

D802

IN5398

C803

10K

DA01
MTZJ 9.1B

1

2

3

4

DA02
MTZJ 9.1B

5

6

GND

7

Y

DA05
MTZJ 9.1B

C
LV02
56uH

DA04
MTZJ 9.1B

R808

2.7K

C808
820pF

Q801

STR-F6656

1

R806

1K

R807

0.24 1R

R801
1 5W

R809

4.7K

L080
10uH

VCC

42

C080

C081

100uF 10V

0.01uF

41

SDA

40

R015

R019

100

4.7K

SCL

39

R016

R018

100

4.7K

38

R017
470

37

R050 4.7K

36

IR

35

C002

1000pF

34

33

C005

15pF CH

32

X001

8.0M

31

C004
15pF CH

30

C007

12pF

29

L001
24uH

28

C006
10pF

VD

27

C015

0.022uF

HD

26

FB

25

C014
100pF

24

C013
330pF

23

2221

C012
330pF

C011
330pF

RA03

RA04

47K

10K

QA04
KRC112

QA03
KRC112

C016
470pF

L550
10uH

C557
104M

R553
10K

C558
104M

C559
104M

Q807

3

2

Q805

31

2

C552
100uF
16V

DV01
MTZJ 9.1BCV05

R013

10K

R052

4.7K

R022

10K

UGL-349KNT

1 2 3 4 5

C828
1000uF 16V

C829
470uF 16V

C003
104M

Q004
C111M

R060
100

R061
100

R062
100

VCC(8V)

Z501

COMBFILTER

D004
MTZJ

9.1B

1

3

Q003

2

KIA7042

R023

10K

Q006

C3198Y

R025
10K

Q205

C3198Y

D001

1N4148

D002

1N4148

D003

1N4148

+8v

Q002

AT24C04

R012

100

5

R011
100

L081
10uH

C010
223M

D887
MTZJ 9.1B

4

6

3

2

7

8

1

C090
104M

1

EXIT
SOUND IN

2

L601

C601

4.7uH

L002

1uH

R036

10K

R026

10K

R215

2.2K

VIDEO 2

VIDEO 1

C109
104M

C

Y

10uF

3

4

5

6

R202
220

SCL

7

R203

220

SDA

8

C301

BAND GAP

2.2uF

C302
223M

L501
10uH

C506
224M

R650

10K

C201
104M

R221

10K

C223
100pF

9

C504

2.2uF

C

10

SVHS

C505

2.2uF

Y

11

C501

C502

223M

100uF 16V

VCC

12

CVBS IN1

13

DV07

C204
1uF

MTZJ 9.1B

MTZJ 9.1B

DV02

GND

14

C602

0.47uF

AUDIO OUT

15

C503

104M

16

CVBS IN2

17

C017
100pF

BLACK CURRENT

18

18

B

19

R204
100

G

20 37

R205

100

R

21

R206
100

BEAM

22

CURRENT GUARD

R-IN

23

C208
223M

G-IN

24

C206
223M

B-IN

25

C205
223M

F/B

26

R225

1K

27

C018
100pF

Q501

TDA8842

SOUND DECC

V-DRIVE

SAND CASTLE

DIGIDEC

CVBS OUT

PLL FILTER

C603
104M

56

55

54

R201

10K

IF AGC

53

R301

39K

TOOTH

52

C303
104M

V SAW

51

EHT

50

49

48

A

47

B

46

45

GND

44

PHI-1

43

PHI-2

42

41

H-OUT

40

39

38

VCC

COLOR

36

4.43
35

3.58
34

33

32

31

30

2928

C413
1000pF

C304 1000pF

C305 1000pF

C414

4.7uF

R409

C417
472M

C419

103M

R410
18K

R413
100

C508

0.22uF

C514
104M

C513
332M

Q441

C3198Y

R403
91K

R405
1K

R401
10K

15K

C418
1uF

R414

470

C416

D401

104M

MTZJ 7.5B

R400

C512
100uF 16V

X Y

R442

1K

3k

R511

1

R441

C441

9.1K
1uF

C511
103M

R512
100K

X501

X502

4.43M

3.58M

C515

C516

240pF

220pF

D442

MTZJ 12B

R443

8.2K

C442
104M

M501

HARNESS 10P

IK

1

B

2

G

3

R

4

5

12V

6

7

8

HEAT

9

180V

C840
470uF

16V

R840

120

1/2R

R303
1 1/2R

L826
18uH

(KRF9200)

D441

1N4937

+13V

C401
390pF

1010

1

2

3

4

5

6

7

8

9

D840
MTZJ 12B

C903

56pF

R903

1.2K

D901

MTZJ7.5B

IK

B

G

R

L911
18uH

12V

C902

51pF

HEAT

C910
250V
10uF

180V

R902

1.3K

L910
18uH

C918

16V 220uF

C901

20pF

R901

1.3K

R950

2.4K

D903

MTZJ3.3B

C851

100uF 16V

R474
100K

C473

47uF 35V

470uF 35V

18V VER

R404

C403

39 1/2R

100uF
16V

Q401

C3228Y

R406

R402
1K

100

C412
222M

185V VIDEO

HEATER

45V VER

C312

1

C906
104M

1

C904
104M

1

R920

1K

R908

C905

4.7K

104M

Q604

KRA110M

R477

2.7K 1R

H-SIZE

R475
50KB

R473
10K

Q412

A1275Y

R476

100

D472
1N4148

+135V

607RA-180K

(RF9200)

C309
470pF 500V

D381
1N4937

T401
KLN2019

R411
1 1/2R

R407

27

Q231

A1266Y

Q902

(R)

TDA6111Q

2

3

4 5 6

C913
470pF

R911
2K

Q901

TDA6111Q

R912
2K

Q903

TDA6111Q

C930
1000pF

R913
2K

R620
51K

C620
10uF

Q301

TDA8351

321

C306
100u

35V

R304
1/2R

1

R472

1.2 1/2R

Q411
KTD2059Y

2.2uF 250V

R991

2R 1.0

Q404
KTD2499
HOR OUT

R234
110K

C232
104M

R235
560

500V

(G)

C914
470pF
500V

(B)

5 67879

M

AUDIO INPUT

654

C390

0.01uF

C307

C392

22uF

200V

100V

104M

L411

HW-VN

L413
KLN3041

L412
KLN3041

C492
10uF 50V NP

C281

C311

470pF 500V

D382

1N4937

C405

7500pF 1.6K

M

C406

0.1uF 630V

D232
1N4148

C908
223M

2 3 4 5 678 9

C909
223M

2 3 4

C907
223M

R602

R603

2.4K

910

R302

2.4K

C391
104M

R479

330 1/2R

R478
1K 1/2R

D471
1N4148

R281
1/2R 1

L901

C310
100V
10uF

R381

0.33 1/2R

C922
250V 104M

C923
250V 104M

C915
470pF
500V

C921
250V 104

VR

Q603
KTC3198Y

C612

16V 100uF

39 1/2R

7

R305

470pF 500V

7

0.62uF 200V

1N4937

D411
RU4DS

D412
RU4DS

8

9

R916
68K

R923
1K 1/2W

1K 1/2W

R915

68K

R914

68K

C919

250V 10uF

R611
330

2

4

3

Q601

KIA6278P

6

5

C617

16V 1000uF

98

R306
10K

KLN2061

C408

C409

0.18uF 200V

C407

0.18uF
200V

D281

C282

R992
2R 1.8

R382

0.33
1/2W

R233

8.2K 1/2R

D231
MTZJ 8.2B

V901

ORION : A51QCD90X

LG : A51QAE020X

V901A

R922

1K 1/2W

R921

SG02

R615
1R 10

L401

1

3

2

9

7

10

7

6

R232

4.7K

PCS629-03D

SG01

1.5KV

1.5KV

SG03

1.5KV

D902

1N4004

C611

1

100pF

8

C618
25V 1000uF

C308
104M

R307

220 1R

R408

1K 1/2R

C410
500V
2200pF

T461

MCG-20A36

3000

12

11

C207

0.047uF 200V

R230
16K

R231

4.7K

D230
1N4148

SG04

1.5KV

R906

2.2M
1/2W

LG : 153-210Z
ORION : ODY-S2108

L491
6800uH

C491
1uF 200V

R412

560 1/2R

H

F

S

8

4

5

M

R229
1K 1/2R

C917
2200pF 2KV

C920

4.7uF 250V

P601
5267-02

YFW500-624

H.V

FOCUS

SCREEN

W661

SPK-1203

V901L

23

P401

4P

22

21

20

-47-

CAUTION :

SINES THESE PARTS MARKED BY ARE CRITICAL FOR SAFETY USE ONES

DESCRIBED ON PARTS LIST ONLY

1.The unit of all resistors is the "OHM" unless otherwise listed.

**NOTES**

K=1,000 M=1,000,000 1/2S:SOLID 1/2W

1/2R:Metal or Metal Oxide 1/2W 5W:Cement Resistor

2.All capacitors are the 50V Ceramic ones of which the unit

is " pF" unless otherwise listed.

M

= PLASTIC CONDENSER

3.The voltage and waveform is measured between the indicated point

and the chassis ground with the DVM AND THE OSCILLSCOPE.

The input signal is a color bar one

with all picture controls at standard.

4. All diodes are the 1N4148 unless otherwise listed

PK : PEAKING COIL

CCTV SCHEMATIC DIAGRAM

MODEL NO.
CHASSIS NO. PMFM02

CPX2102MS

THE UPDATED PARTS LIST

FOR THIS MODEL IS

AVAILABLE ON ESTA

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International Sales Division

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