Sony KV-25FS12, KV-25FS12C Service manual

SERVICE MANUAL

MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.

BA-5

CHASSIS

KV-25FS12 KV-25FS12C

RM-Y173 E SCC-S38UA

RM-Y173 E SCC-S38VA

9-965-902-01

KV-25FS12

RM-Y173

TRINITRON® COLOR TELEVISION

SPECIFICATIONS

KV-25FS12 / 25FS12C

Television system

NTSC

KV-25FS12

Power requirements 120V, 60Hz 220V, 50/60Hz

Number of Inputs/Outputs

1)

Video

S Video

Audio

Audio Out

Headphone Out

2)

3)

4)

2

1

2

1

Speaker output (W) 7.5 x 2

Power Consumption (W)

In use (Max) 165W

In Standby 1W

Dimensions(W/H/D)

mm 614.8 x 564.1 x 499.7

13

x 22 13/64 x 19 49/

in 24

/

64

Mass

kg

lbs

1)

1 Vp-p 75 ohms unbalanced, sync negative

2)

Y: 1 Vp-p 75 ohms unbalanced, sync negative

C: 0.286 Vp-p (Burst signal), 75 ohms

3)

500 mVrms (100% modulation), Impedance: 47 kilohms

4)

More than 408 mVrms at the maximum volume setting (variable)

More than 408 mVrms (ﬁ x); Impedance (output): 2 kilohms

36 kg

79 lbs 6 oz.

KV-25FS12C

64

Channel coverage

VHF: 2-13/ VHF: 14-69/ CATV: 1-125

Picture tube

Flat Trinitron® tube

Visible screen size

25-inch picture measured diagonally

Actual screen size

27-inch measured diagonally

Antenna

75 ohm external terminal for VHF/UHF

Supplied Accessories

Remote Commander RM-Y173 Size AA (R6) batteries (2) Dipole Antenna

Optional Assessories

Connecting cables: VMC-810S/820S, VMC-720M, YC-15V/30V, RK74A U/V mixer EAC-66

Design and speciﬁ cations are subject to change without notice.

— 3 —

KV-25FS12 / 25FS12C

WARNINGS AND CAUTIONS

CAUTION

Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT, after removing the anode.

WARNING!!

An isolation transformer should be used during any service to avoid possible shock hazard, because of live chassis. The chassis of this receiver is directly connected to the AC power line.

! SAFETY-RELATED COMPONENT WARNING!!

Components identiﬁ ed by shading and ! mark on the schematic diagrams, exploded views, and in the parts list are critical for safe operation. Replace these components with Sony parts whose part numbers appear as shown in this manual or in supplements published by Sony. Circuit adjustments that are critical for safe operation are identiﬁ ed in this manual. Follow these procedures whenever critical components are replaced or improper operation is suspected.

ATTENTION!!

Apres avoir deconnecte le cap de l’anode, court-circuiter l’anode du tube cathodique et celui de l’anode du cap au chassis metallique de l’appareil, ou la couche de carbone peinte sur le tube cathodique ou au blindage du tube cathodique.

Aﬁ n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.

! ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

Les composants identiﬁ es par une trame et par une marque ! sur les schemas de principe, les vues explosees et les listes de pieces sont d’une importance critique pour la securite du fonctionnement. Ne les remplacer que par des composants sony dont le numero de piece est indique dans le present manuel ou dans des supplements publies par sony. Les reglages de circuit dont l’importance est critique pour la securite du fonctionnement sont identiﬁ es dans le present manuel. Suivre ces procedures lors de chaque remplacement de composants critiques, ou lorsqu’un mauvais fonctionnement suspecte.

— 4 —

SAFETY CHECK-OUT

KV-25FS12 / 25FS12C

After correcting the original service problem, perform the following safety checks before releasing the set to the customer:

1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors.

3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely certain that you have replaced all the insulators.

4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the customer and recommend their replacement.

5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.

7. Check the B+ and HV to see if they are speciﬁ ed values. Make sure your instruments are accurate; be suspicious of your HV meter if sets always have low HV.

8. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

Leakage Test

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microamperes). Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instructions.

2. A battery-operated AC milliampmeter. The Data Precision 245 digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate low voltage scale. The Simpson’s 250 and Sanwa SH-63TRD are examples of passive VOMs that are suitable. Nearly all battery-operated digital multimeters that have a 2 VAC range are suitable (see Figure A).

How to Find a Good Earth Ground

A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw on most AC outlet boxes is also at earth ground. If the retaining screw is to be used as your earth ground, verify that it is at ground by measuring the resistance between it and a cold-water pipe with an ohmmeter. The reading should be zero ohms.

If a cold-water pipe is not accessible, connect a 60- to 100-watt troublelight (not a neon lamp) between the hot side of the receptacle and the retaining screw. Try both slots, if necessary, to locate the hot side on the line; the lamp should light at normal brilliance if the screw is at ground

To Exposed Metal

Parts on Set

Trouble Light

Ohmmeter

0.15 F

1.5 K Ω

AC Outlet Box

AC

Voltmeter

(0.75 V)

Earth Ground

Figure A. Using an AC voltmeter to check AC leakage. Figure B. Checking for earth ground.

— 5 —

Cold-water Pipe

KV-25FS12 / 25FS12C

SELF-DIAGNOSTIC FUNCTION

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to ﬂ ash. The number of times the LED ﬂ ashes translates to a probable source of the problem. A deﬁ nition of the STANDBY/TIMER LED ﬂ ash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.

Diagnostic Test Indicators

When an error occurs, the STANDBY/TIMER LED will ﬂ ash a set number of times to indicate the possible cause of the problem. If there is more than one error, the LED will identify the ﬁ rst of the problem areas. Results for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, and error has occurred.

Diagnostic Item

Description

Power does not turn on

+B overcurrent (OCP)*

I-Prot

IK (AKB)

No. of times

STANDBY/ TIMER

lamp ﬂ ashes

Does not light

2 times

4 times

5 times

Self-Diagnositc

Display/

Diagnostic Result

2:0 or 2:1

4:0 or 4:1

5:0 or 5:1

Probable Cause Location

• Power cord is not plugged in.

• Fuse is burned out (F601). (A Board)

• H.OUT (Q502) is shorted.(A Board)

• IC702 is shorted. (CB Board)

• +13V is not supplied. (A Board)

• IC502 is faulty. (A Board)

• Viedo OUT (IC502) is faulty. (A Board)

• IC1301 is faulty. (MB Board)

• Screen (G2) is improperly adjusted.**

Detected Symptoms

• Power does not come on.

• No power is supplied to the TV.

• AC Power supply is faulty.

• Power does not come on.

• Load on power line is shorted.

• Has entered standby state after horizontal raster.

• Vertical deﬂ ection pulse is stopped.

• Power line is shorted or power supply is stopped.

• No raster is generated.

• CRT Cathode current detection reference pulse output is small.

*If a +B overcurrent is detected, stoppage of the vertical deﬂ ection is detected simultaneously. The symptom that is diagnosed ﬁ rst by the mircrocontroller is displayed on the screen. **Refer to Screen (G2) Adjustments in Section 2-4 of this manual.

Display of Standby/Timer LED Flash Count

2 times

4 times

5 times

LED ON 0.3 sec.

LED OFF 0.3 sec.

LED OFF

3 sec.

Standby/Timer LED

Diagnostic Item Flash Count*

+B Overcurrent 2 times V-STOP 4 times IK (AKB) 5 times *One ﬂ ash count is not used for self-diagnostic.

Stopping the Standby/Timer LED Flash

Turn off the power switch on the TV main unit or unplug the power cord from the outlet to stop the STANDBY/TIMER LAMP from ﬂ ashing.

— 6 —

KV-25FS12 / 25FS12C

Self-Diagnostic Screen Display

For errors with symptoms such as “power sometimes shuts off” or “screen sometimes goes out” that cannot be conﬁ rmed, it is possible to bring up past occurrences of failure on the screen for conﬁ rmation.

To Bring Up Screen Test

In standby mode, press buttons on the Remote Commander sequentially, in rapid succession, as shown below:

Display

Self-Diagnostic Screen Display

Handling of Self-Diagnostic Screen Display

Since the diagnostic results displayed on the screen are not automatically cleared, always check the self-diagnostic screen during repairs. When you have completed the repairs, clear the result display to “0”. Unless the result display is cleared to “0”, the self-diagnostic function will not be able to detect subsequent faults after completion of the repairs.

Clearing the Result Display

To clear the result display to “0”, press buttons on the Remote Commander sequentially when the diagnostic screen is displayed, as shown below:

Channel

Quitting the Self-Diagnostic Screen

To quit the entire self-diagnostic screen, turn off the power switch on the Remote Commander or the main unit.

Channel

SELF DIAGNOSTIC 2: 000

3: N/A

4: 000

5: 001

101: N/A

8

ENTER

5

Sound Volume - Power ON

Note that this differs from entering the Service Mode (Sound Volume

Numeral “0” means that no fault was detected. Numeral “1” means a fault was detected one time only.

+

).

Self-Diagnostic Circuit

FROM

CB BOARD

IC702 PIN 5

MB BOARD

IC1301

Y/CHROMA JUNGLE

21

IK IN

A BOARD

IC502

V. OUT

REF

3

MB BOARD

IC1001

SYSTEM

IO-BDAT

17

I-Prot

36

MB BOARD

IC1003

MEMORY

5

BDA

A BOARD

18

FROM

IC501

PIN 3

+B overcurrent (OCP)

Occurs when an overcurrent on the +B (135V) line is detected by pin 18 of IC1301 (MB Board). If the voltage of pin 18 of IC1301 (MB Board) is less than 1V when V.SYNC is more than seven verticals in a period, the unit will automatically turn off.

I-Prot

Occurs when an absence of the vertical deﬂ ection pulse is detected by pin 17 of IC1001 (MB Board). Power supply will shut down when waveform interval exceeds 2 seconds.

IK (AKB)

If the RGB levels* do not balance within 2 seconds after the power is turned on, this error will be detected by IC1301 (MB Board). TV will stay on, but there will be no picture.

*(Refers to the RGB levels of the AKB detection Ref pulse that detects 1K).

HP/PROTECT

SDA

35

37

IO-SDAT

O-LED

18

DISPLAY

— 7 —

1-1. REAR COVER REMOVAL

2 Screws +BVTP 4x16

KV-25FS12 / 25FS12C

SECTION 1: DISASSEMBLY

2 Screws +BVTP 4x16

2 Screws +BVTP 3x10

1-2. CHASSIS ASSEMBLY REMOVAL 1-3. SERVICE POSITION

CB Board

VB Board

A Board

Chassis Assembly

— 8 —

MB Board

K Board

1-4. PICTURE TUBE REMOVAL

WARNING: BEFORE REMOVING THE ANODE CAP High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.

1

10

KV-25FS12 / 25FS12C

Coated Earth Ground Strap

9

1. Discharge the anode of the CRT and remove the anode cap.

2. Unplug all interconnecting leads from the deﬂ ection yoke, neck assembly, degaussing coils and CRT grounding strap.

8

3

3. Remove the CB Board from the CRT.

4. Remove the chassis assembly.

5. Loosen the neck assembly ﬁ xing screw and remove.

6

7

2

6. Loosen the deﬂ ection yoke ﬁ xing screw and remove.

7. Place the set with the CRT face down on a cushion and remove the degaussing coil holders.

8. Remove the degaussing coils.

9. Remove the CRT grounding strap and spring tension devices.

5

10. Unscrew the four CRT ﬁ xing screws [located on each CRT corner] and remove the CRT [Take care not to handle the CRT by the neck].

4

ANODE CAP REMOVAL PROCEDURE

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT. NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon painted on the CRT.

c

b

a

Anode Button

Turn up one side of the rubber cap

1

inthe direction indicated by arrow

a

.

HOW TO HANDLE AN ANODE CAP

Use your thumb to pull the rubber

2

cap ﬁ rmly in the direction indicated by arrow

.

b

When one side of the rubber cap separates from

3

the anode button, the anode cap can be removed by turning the rubber cap and pulling it in the direction of arrow

.

c

1. Do not use sharp objects which may cause damage to the surface of the anode cap.

2. To avoid damaging the anode cap, do not squeeze the rubber covering too hard. A material ﬁ tting called a shatter-hook terminalis built into the rubber.

3. Do not force turn the foot of the rubber cover. This may cause the shatter-hook terminal to protrude and damage the rubber.

— 9 —

SECTION 2: SET-UP ADJUSTMENTS

KV-25FS12 / 25FS12C

The following adjustments should be made when a complete realignment is required or a new picture tube is installed.

These adjustments should be performed with rated power supply voltage unless otherwise noted.

Set the controls as follows unless otherwise noted: VIDEO MODE: Standard PICTURE CONTROL: Normal BRIGHTNESS CONTROL: Normal

2-1. BEAM LANDING

Before beginning adjustment procedure:

1. Degauss the entire screen.

2. Feed in the white pattern signal.

ADJUSTMENT PROCEDURE

1. Input a raster signal with the pattern generator.

2. Loosen the deﬂ ection yoke mounting screw, and set the purity control to the center as shown below:

Purity Control

Perform the adjustments in order as follows:

1. Beam Landing

2. Convergence

3. Focus

4. Screen (G2)

5. White Balance

Note Test Equipment Required:

1. Color Bar Pattern Generator

2. Degausser

3. DC Power Supply

4. Digital Multimeter

6. Switch over the raster signal to red and blue and conﬁ rm the condition.

7. When the position of the deﬂ ection yoke is determined, tighten it with the deﬂ ection yoke mounting screw.

8. If landing at the corner is not right, adjust by using the disk magnets.

3. Turn the raster signal of the pattern generator to green.

4. Move the deﬂ ection yoke backward, and adjust with the purity control so that green is in the center and red and blue are even on both sides.

Blue Red

Green

5. Move the deﬂ ection yoke forward, and adjust so that the entire screen becomes green.

— 10 —

Disk magnets or rotatable disk magnets correct

these areas (a-d)

b

d

Purity control

corrects this area

ba

cd

Deflection yoke positioning

corrects these areas

a

c

KV-25FS12 / 25FS12C

2-2. CONVERGENGE

Before starting convergence adjustments:

1 Perform FOCUS, VLIN and VSIZE adjustments.

2. Set BRIGHTNESS control to minimum.

3. Feed in dot pattern.

VERTICAL STATIC CONVERGENCE

1. Adjust V. STAT magnet to converge red, green and blue dots in the center of the screen (Vertical movement adjust V.STAT RV701 to converge).

R G B

Center dot

RV701

V.STAT

R

G

B

HORIZONTAL STATIC CONVERGENCE

If the blue dot does not converge with the red and green dots, peform the following:

1. Move BMC magnet (a) to correct insufﬁ cient H.Static convergence.

2. Rotate BMC magnet (b) to correct insufﬁ cient V.Static convergence.

3. After adjusting the BMC magnet, repeat Beam Landing Adjustment.

V. S TAT

BMC MAGNET

PURITY

V.STAT magnet

2. Tilt the V. STAT magnet and adjust static convergence to open or close the V. STAT magnet.

When the V. STAT magnet is moved in the direction of arrow a and b,

red, green, and blue dots move as shown below:

1

a

b

2

a

3

b

a

B

b

G

R

b

a

R

G

b

a

RG B

b

BG R

B

b

B

G

R

b

G

R

b

BMC magnet

a

— 11 —

KV-25FS12 / 25FS12C

DYNAMIC CONVERGENCE ADJUSTMENT

Before performing this adjustment, perform Horizontal and Vertical Static Convergence Adjustment.

1. Slightly loosen deﬂ ection yoke screw.

2. Remove deﬂ ection yoke spacers.

3. Move the deﬂ ection yoke for best convergence as shown below:

BGR

R

B

G

G R

B

B G

R

RGB

G

B

BGR RGB

R G B

R

RGB

BGR

4. Tighten the deﬂ ection yoke screw.

5. Install the deﬂ ection yoke spacers.

4. Adjust XCV core to balance X axis.

5. Adjust YCH VR to balance Y axis.

6. Adjust vertical red and blue convergence with V.TILT (TLV VR.)

Note: Perform adjustment 3-6 while tracking items 1 and 2.

SCREEN-CORNER CONVERGENCE

1. Afﬁ x a permalloy assembly corresponding to the misconverged areas:

b

d

a

a-d: screen-corner

misconvergence

cd

c

ba

2-3. FOCUS

1. Adjust FOCUS control for best pictures.

TLH PLATE ADJUSTMENT

1. Input crosshatch pattern.

2. Adjust PICTURE QUALITY to standard, PICTURE and BRIGHTNESS to 50%, and OTHER to standard.

3 Adjust the Horizontal Convergence of red and blue dots by tilting the

TLH plate on the deﬂ ection yoke.

RV701

V. S TAT

CB Board

VB Board

TLH Plate

TLV

YCH

(TLV)

Focus (FV)

Screen (G2)

2-4. SCREEN (G2)

1. Input a dot pattern.

2. Set the PICTURE and BRIGHTNESS controls at minimum and COLOR control at normal.

3. Adjust SBRT, GCUT, BCUT in service mode with an oscilloscope as shown below so that voltages on the red, green, and blue cathodes are 170 ± 2VDC.

B R R B (R)(B) (B)(R)

TLH+ TLH-

XCV

— 12 —

170 ± 2.0 VDC

GND

pedestal

2-5. METHOD OF SETTING THE SERVICE ADJUSTMENT MODE

SERVICE MODE PROCEDURE

1. Standby mode (power off).

2. Press

Display

Channel 5 Sound Volume + Power

on the Remote Commander (press each button within a second).

SERVICE ADJUSTMENT MODE ON

KV-25FS12 / 25FS12C

1. The CRT displays the time being adjusted.

Category

Mode

service

Signal

ntsc

Type

vchp

1

2. Press

3. Press

4. Press

or 4 on the Remote Commander to select the time.

3

or 6 on the Remote Commander to change the data.

ENTER

MUTING

then

Display

Item

defl

hsiz 16

00000000

to save into the memory.

SERVICE ADJUSTMENT MODE MEMORY

Turn the set off then on to exit Service Adjustment Mode.

Display

Category

Mode

service defl hsiz 16

Signal

ntsc

Type

vchp 00000000 00000000

Item

write

Item Data

MUTING

ENTER

Green

Red

2-6. WHITE BALANCE ADJUSTMENTS

1. Input an entire white signal with burst.

2. Set to Service Adjustment Mode.

3. Set the PICTURE and BRIGHTNESS to minimum.

4. Adjust with SBRT if necessary.

5. Select GCUT and BCUT with

6. Adjust with

3

and 6 for the best white balance.

1

and 4 .

7. Set the PICTURE and BRIGHTNESS to maximum.

8. Select GDRV and BDRV with

9. Adjust with

3

and 6 for the best white balance.

10. To write into memory, press

1

and 4.

MUTING

then

ENTER

.

— 13 —

SECTION 3: SAFETY RELATED ADJUSTMENTS

KV-25FS12 / 25FS12C

3-1. X R564 CONFIRMATION METHOD (HOLD-DOWN CONFIRMATION) AND READJUSTMENTS

The following adjustments should always be performed when replacing the following components which are marked with diagram:

Part Replaced ( )

DY, T505, CRT, IC501 C507, C520, C505, C509, C515, T504,

Y

on the schematic

Adjustment ( )

HV HOLD-DOWN R564

T503, C551, L510, C546, C537, C547, D517, D518, D519, R560, R561, R562, R563, R565, R566,

R567, R525....................A Board

IC1301........................MB Board

PREPARATION BEFORE CONFIRMATION

1. Using a Variac, apply AC input voltage: 120-220 ±2 VAC.

2. Turn the POWER switch ON.

3. Input a white signal and set the PICTURE and BRIGHTNESS controls to maximum.

4. Conﬁ rm that the voltage between C546 (+) or TP503 and ground is more than 97 VDC.

HOLD-DOWN OPERATION CONFIRMATION

1. Connect the current meter between Pin 11 of the FBT (T505) and the PWB land where Pin 11 would normally attach (See Figure 1 on the next page).

2. Input a dot signal and set PICTURE and BRIGHTNESS to minimum: IABL = 100 ± 100µA.

3. Conﬁ rm the voltage of A Board TP-600 is 135 ± 1 VDC.

4. Connect the digital voltmeter and the DC power supply via Diode 1SS119 to C546 (+) and ground (See Figure 1 on next page).

5. Increase the DC power voltage gradually until the picture blanks out.

6. Turn DC power source off immediately.

7. Read the digital voltmeter indication (standard < 138 ± 0.3 VDC).

8. Input a white signal and set PICTURE and BRIGHTNESS to maximum: IABL = 1650 ± 100µA.

9. Repeat steps 4 to 7.

HOLD-DOWN READJUSTMENT

If the setting indicated in Step 2 of Hold-Down Operation Conﬁ rmation cannot be met, readjustment should be performed by altering the resistance value of R564 component marked with

X

.

T505

FBT

ammeter

3.0 mA DC range

ABL

+

-

A

IABL

3-2. B+ VOLTAGE CONFIRMATION AND ADJUSTMENT

Note: The following adjustments should always be performed when replacing the following components, which are marked with schematic diagram on the A Board:

A BOARD: IC601, PH601

1. Using a Variac, apply AC input voltage: 130 ± 2 VAC

2. Input a dot signal.

3. Set the PICTURE and the BRIGHTNESS controls to minimum.

4. Conﬁ rm the voltage of A Board TP-600 is <136 VDC.

5. If step 4 is not satisﬁ ed, replace the components listed above, then repeat Steps 1 – 3.

Y

on the

— 14 —

KV-25FS12 / 25FS12C

11119

+

18

1818

6

5

9

C

6

5

9

C

6

5

9

C

6

5

9

C

R601

R601R601

R615

R615R615

D616

D616D616

B

6

1

F

0

B

6

1

F

0

B

6

1

F

0

B

6

1

F

0

C624

C624C624

H.DRIVE

H.DRIVEH.DRIVE

CN511

C611

C611C611

C654

C654C654

CN506

CN506CN506

1111

CN515

CN515CN515

+B

+B+B

R515

R515R515

CN511

CN511CN511

1111

R516

R516R516

C536

C536C536

D521

D521D521

C554

C554C554

4444

5555

7777

R503

R503R503

C503

C503C503

R502

R502R502

R547

R547R547

9

99

10

1018

1010

R

6

5

R

6

5

9

R

6

5

R

6

5

9

T503

T503T503

L602

L602L602

C629

C629C629

H.PULSE

H.PULSEH.PULSE

FB503

FB503FB503

R507

R507R507

T502

T502T502

Q501

Q501Q501

C504

C504C504

4444

R518

R518R518

C530

C530C530 R529

R529

R529R529

5555

R531

R531R531

6666

R539

R539R539

C543

C543C543

V DY -

V DY -V DY -

V DY +

V DY +V DY +

H DY -

H DY -H DY H DY -

H DY -

H DY -H DY -

H DY +

H DY +H DY +

H DY +

H DY +H DY +

R545

R545R545

POWER SUPPLY

R438

R438R438

R563

R563R563 C546

C546

C546C546

R573

R573R573

C541

C541C541

D510

D510D510

6

7

R540

R540R540

C519

C519C519

R537

R537R537

TH501

TH501TH501

200V

200V200V

D511

D511D511

C552

C552C552

L507

L507L507

+

1SS119

C546

R225

R225 R403

R403

R403R403

H.PROT

H.PROTH.PROT

C542

C542C542

2

4

2

C518

C518C518

IC502

IC502IC502

1

R543

R543R543

6

R225R225

D235

D235D235

D234

D234D234

C213

C213C213

R218

R218R218

R407

R407R407

-13V

-13V-13V

HEATER

HEATERHEATER

C211

C211C211

Q205

Q205Q205

Q206

Q206Q206

C523

C523C523

R532

R532R532

1

CN502

CN502CN502

Q201

Q201Q201

D236

D236D236

D232

D232D232

R231

R231R232

R232

R231R231

R232R232

D233

D233D233

R511

R511R511

R561

R561R561

D514

D514D514

C532

C532C532

JR502

JR502JR502

T505 FBT

135V

135V135V

T505

T505T505

R226

R226R226 R227

R227

R227R227

D520

D520D520

D518

D518D518

D517

D517D517

R558

R558R558

R559

R559R559

R557

R557R557

Q505

Q505Q505

R554

R554R554

D516

D516D516

R555

R555R555

R535

R535R535

JUMPER-ID

JUMPER-IDJUMPER-ID

R801

R801R801

R803

R803R803

R804

R804R804

CN504

CN504CN504

DIGITAL MULTIMETER

+

-

X

R564

R449

R454

R454R454

JR503

JR503JR503

R445

R445R445

Q411

Q411Q411

D620

D620D620

R506

C510

C510C510

T504

T504T504

L509

L509L509

C513

C513C513

R505

R505R505

C555

C555C555

R504

R504R504

R553

R553R553

R506R506

C550

C550C550

L502

L502L502

L505

L505L505

C517

C517C517

E

C

0

2

Q

5

0

2

Q

5

0

2

Q

5

0

2

Q

5

O

H

-

O

H

-

U

T

U

T

O

H

-

O

H

-

U

T

U

T

C505

C505C505

C509

C509C509

C515

C515C515

L510

L510L510

D507

D507D507

C524

C524C524

D506

D506D506

C511

C511C511

L501

L501L501

B

R568

R568R568

R449R449

C448

C448C448

R450

R450R450

R567

R567R567

R565

R565R565

R525

R525R525

Q503

Q503Q503

R447

R447R447

R541

R541R541

R514

R514R514

FB502

FB502FB502

IC501

IC501IC501

R522

R522R522

8888

R527

1111

R527R527

B

E

B

E

C525

C525C525

5555

4444

3333

2222

1111

C

N

5

0

1

C

N

5

0

1

C

N

5

0

1

C

N

5

0

1

R546

R546R546

R533

R533R533

R534

C551

R534R534

C551C551

TP600

AMMETER 3mA dc range

A

+

-

Figure 1

— 15 —

SECTION 4: CIRCUIT ADJUSTMENTS

ELECTRICAL ADJUSTMENTS BY REMOTE COMMANDER

Use the Remote Commander (RM-Y173) to perform the circuit adjustments in this section.

Test Equipment Required: 1. Pattern generator 2. Frequency counter 3. Digital multimeter 4. Audio oscillator

KV-25FS12 / 25FS12C

4-1. SETTING THE SERVICE ADJUSTMENT MODE

1. Standby mode (Power off).

2. Press the following buttons on the remote commander within a second of each other:

Display

Channel 5 Sound Volumne + Power

SERVICE ADJUSTMENT MODE ON

1. The CRT displays the item being adjusted.

Display

Item

Item Data

2. Press

3. Press

4. Press

Category

Mode

service defl hsiz 16

Signal

ntsc

Type

vchp 00000000 00000000

1

or 4 on the Remote Commander to select the item.

3

or 6 on the Remote Commander to change the data.

MUTING

then

ENTER

to write into memory.

SERVICE ADJUSTMENT MODE MEMORY

Display

Category

Mode

service defl hsiz 16

Signal

ntsc

Type

vchp 00000000 00000000

8

ENTER

1. Press

Signal Type

then

Category

Mode

service defl hsiz 16

ntsc

vchp 00000000 00000000

on the Remote Commander to initialize.

Display

Item

write

Item Data

2. Turn set off then on to exit service adjustment mode.

Item

Data

MUTING

write

ENTER

MUTING

ENTER

Carry out Step 1 when adjusting IDs 0-6 and when replacing and adjusting IC1003

Green

Red

Green

Red

4-2. MEMORY WRITE CONFIRMATION METHOD

1. After adjustment, pull out the plug from the AC outlet, then replace the plug in the AC outlet again.

2. Turn the power switch ON and set to Service Mode.

3. Call the adjusted items again to conﬁ rm they were adjusted.

4-3. REMOTE ADJUSTMENT BUTTONS AND INDICATORS

MUTING

(Enter into memory

DISPLAY

(Service Mode)

1

Disp. (Item up)

2

(Device Item Up)

4

Disp. (Item down)

8

(Initialize)

VOLUME (+)

(Service Mode)

RM-Y173

POWER

(Service Mode)

3

Item (Data up)

6 Item (Data down)

5

(Device item down)

ENTER

(Enter into memory

0 (Remove from memory)

— 16 —

ADJUSTMENT ITEMS (1 OF 2)

KV-25FS12 / 25FS12C

FIX

Reg # ITEM FUNCTION RANGE

1 HSIZ Horizontal Size Adjustment 0-63 35 2 HPOS Horizontal Position Adjustment 0-63 33 21 3 VBOW Vertical Line Bowing Adj. 0-15 5 9 4 VANG Vertical line Bowing Slant Adj. 0-15 7 5 5 TRAP Horizontal Trapezoid Adj. 0-15 7 7 6 PAMP Horizontal PIN Distortion Adj. 0-63 7 32 7 UPIN Upper PIN Distortion Adj. 0-63 36 39 8 LPIN Lower PIN Distortion Adj. 0-63 36 39

9 VM Velocity Modulation On/Off 0,1 0 10 BLKO Vertical Blanking On/Off 0,1 0 0 11 VMLV Velocity Modulation Level 0-3 2 12 AGN2 Aging 2 0,1 0 0 13 REFP Reference Pulse Position 0,1 0 0 14 VBLK Vertical Blanking On/Off 0,1 0 0 15 JPSW 0,1 0 0 16 VSIZ Vertical Size Adjustment 0-63 40 49 17 VPOS Vertical Position Adj. 0-63 32 32 18 VLIN Vertical Linearity Adj. 0-15 7 6 19 SCOR Vertical "S" Correction Adjustment 0-15 6 8 20 VZOM 16:9 CRT Z Mode On/Off 0,1 0 0 21 EHT Vertical High-Voltage Correction 0-15 6 6 22 ASP Aspect Ratio Control 0-63 47 47 23 SCRL 16:9 CRT Z Mode Trans. Scroll 0-63 31 31 24 HBLK Horizontal Blanking On/Off 0,1 1 1 25 LBLK Left Blanking Adjustment 0-15 11 12 26 RBLK Right Blanking Adjustment 0-15 8 5 27 VUSN V Saw Waveform Compress 0,1 0 0 28 HDW Horizontal Drive Pulse Width 0,1 1 1 29 EWDC "Parabola" EW/ D.C. Adjustment 0.1 0 0 30 LVLN Lower Screen BTM Vertical Line Adj. 0-15 0 0 31 UVLN Upper Screen BTM Vertical Line Adj. 0-15 0 0 32 HTRP Horizontal Trapezoid Adj. 0,1 0 0 33 RDRV R Output Drive Control 0-63 31 36 34 GDRV G Output Drive Control 0-63 21 26 35 BDRV B Output Drive Control 0-63 21 25 36 RCUT R Output Cutoff Control 0-15 10 8 37 GCUT G Output Cutoff Control 0-15 6 6 38 BCUT B Output Cutoff Control 0-15 6 7 39 DCOL Dynamic Color On/Off 0,1 0 1 40 SHUE Sub HUE 0-31 15 15 41 SCOL Sub Color 0-31 15 15 42 SBRT Sub BRIGHTNESS 0-31 16 15 43 RON R Output On/Off 0,1 1 1 44 GON G Output On/Off 0,1 1 1 45 BON B Output On/Off 0,1 1 1 46 AXPL Axis PAL 0,1 0 0 47 AXNT Axis NTSC 0,1 1 0 48 CBPF Chroma BPF On/Off 0,1 1 1 49 CTRP Y TRAP FILTER On/Off 0,1 1 1 50 COFF Color On/Off 0,1 0 0 51 KOFF Set Color Killer 0,1 0 0 52 SSHP Sub SHARPNESS 0-15 5 7

DATA NTSC VIDEO RF

Palette mode controls this register

AVERAGE

DATA

38

— 17 —

ADJUSTMENT ITEMS (2 OF 2)

KV-25FS12 / 25FS12C

Reg # ITEM FUNCTION RANGE

53 SHPF SHARPNESS Circuit Fo 0,1

FIX

DATA NTSC VIDEO RF

Palette mode controls this register

AVERAGE

54 PREL Pre-Shoot / Over-Shoot 0,1 1 1 55 Y-DC DC Transmission Ratio Switching 0,1 1 56 GAMM Gamma Correction Amnt 0-3 1

Palette mode controls this register Palette mode controls this register

57 ABLM ABL Mode Switching 0,1 1 1 58 VTH ABL CD VHT Switching 0,1 1 1 59 YDEL Y Delay Time Control 0-15 7 7 60 NCOL No Color ID 0,1 1 1 61 FSC FSC Out On/Off 0,1 1 1 62 K-ID Killer ID Control On/Off 0,1 0 0 63 HOSC Horizontal VCO Oscillation Freq. 0-15 7 7 64 VSS Vertical Sync Slice Level 0,1 0 0 65 HSS Horizontal Sync Slice Level 0,1 0 0 66 HMSK 0,1 0 0 67 VTMS Select Signal VTIM Pin 0-3 0 0 68 CDMD Vertical Count Down Mode Switching 0-3 3 0 0 69 AFC AFC Loop Gain Switching 0-3 0 0 0 0 70 FIFR Field Frequency 0-3 3 3 3 71 SBAL Sub Balance 0-15 5 7 72 SBAS Sub Bass 0-15 0 9 73 STRE Sub Treble 0-15 3 9 74 BBEL BBE Low 0-15 4 12 75 BBEH BBE High 0-15 5 9 76 SRND Surround 0,63 0 13 77 BBE BBE On/Off 0,1 0 1 78 DISP O.S.D Display Position 0-63 15 15 79 TROT Tilt Correction 0-63 31 31 80 HCLW Horizontal Count Lower Limit 0-127 16 16 81 HCHG Horizontal Count High Limit 0-127 64 64 82 ABL0 0,1 4 1 83 ABL1 0-7 Palette mode controls this register 7 84 SYSC Color System 0-7 0 6 85 VENH Vertical Enhancement 0-7 0 4 86 CBPC 0,1 3 0 87 BYCF 0,1 0 0 88 KILC 0,1 Palette mode controls this register 0 89 LDOT 0,1 1 0 90 CORE 0,1 1 0 91 CHTR 0,1 0 92 CHPF 0,1 1 93 ENHO 0,1 0 94 ID0 0,255 25 17 95 ID1 0,255 3 19 96 ID2 0,255 91 223 97 ID3 0,255 2 2 98 ID4 0,255 233 233 99 ID5 0,255 17 19

100 ID6 0,255 0 0

Notes: No. 1-100 show the order that each adjustment mode may be selected while in Service Mode. Data Range shows the range of possible setting for each Adjustment Mode. Initial Data shows the standard settings for each Adjustment Mode.

Signal Type

Chip Version

Function

Mode

service id’s id5 19

ntsc

M37280MK-00SP VERB.O

DATA

1

ID

Number

00010011

Data

— 18 —

KV-25FS12 / 25FS12C

4-4. MB BOARD ADJUSTMENTS

H. FREQUENCY (FREE RUN) CHECK

1. Input a TV mode (RF) with no signal.

2. Connect a frequency counter to base of Q501 (TP-500 H. DRIVE) on the A Board.

3. Check H. Frequency for 15735 ± 200 Hz.

V. FREQUENCY (FREE RUN) CHECK

1. Select video 1 with no signal input.

2. Set the conditions for a standard setting.

3. Connect the frequency counter to TP-508 (V OUT) or CN501 pin

6

(V DY+) and ground on the A Board .

4. Check that V. Frequency shows 60 ± 4 Hz.

DRIVE (RDRV)

1. Input a color-bar signal and set the level to 75%.

2. Set in Standard mode.

3. Activate the Service Adjustment Mode.

3

4. Set both GON and BON items. Using following values. Leave RON set to “1”.

Category

Mode

and

Display

Item

6

set each to the

Item Data

DISPLAY POSITION ADJUSTMENT (DISP)

1. Input a color-bar signal.

2. Set to Service Adjustment Mode.

3. Select DISP with

4. Adjust values of DISP with

5. Write to memory by pressing

1

and 4 .

3

and 6 to adjust characters to the center.

MUTING

then

ENTER

.

6. Check to see if the text is displayed on the screen.

Item

Mode

Category

service micro disp 48

Signal Type

ntsc

vchp

Display

Item

00000000 00000000

Data

SUB BRIGHT ADJUSTMENT (SBRT)

1. Input a monoscope signal.

2. Activate the Service Adjustment Mode.

3. Set the PICTURE and BRIGHTNESS to minimum.

4. Select the SBRT item with

5. Adjust the values of SBRT with crosshatch.

6. Press

MUTING

then

1

and 4 .

ENTER

3

and 6 to obtain a faintly visible

to save into the memory.

service video rdrv 26

Signal Type

ntsc

vchp

00000000 00000000

R ON: ON (1)

G ON: OFF (0)

B ON: OFF (0)

5. Connect an oscilloscope probe to CB Board, J701 Pin 12 (KR) (Red Out) .

6. Select RDRV with

7. Adjust the value of RDRV with

1

and 4 .

3

and 6 for

92.0 ± 2 VDC.

92.0 ± 2VDC

8. Reset GON and BON values to “1”.

R ON: ON (1)

G ON: ON (1)

B ON: ON (1)

9. Press

MUTING

then

ENTER

to save into the memory.

SUB HUE, SUB COLOR ADJUSTMENT (SHUE, SCOL)

1. Input a color-bar signal.

2. Activate the Service Adjustment Mode.

3. Connect an oscilloscope probe to CB Board, CN705 Pin 1

4. Select the SHUE and SCOL item with

and 4 .

5. While showing the SHUE item, adjust the waveform with

4

Blue Out.

1

and 4 until the second and third bars show the same level (V2 = V3 < 0.1 Vp-p).

6. While showing the SCOL item, adjust the waveform with

3

and 6

until the ﬁ rst and fourth bars show the same level (V1 = V4 < 0.1 Vp-p).

7. Press

MUTING

then

V1

ENTER

V2 V3

V4

to save into the memory.

V. SIZE ADJUSTMENT (VSIZ)

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select the VSIZ item with

4. Adjust value of VPOS with

5. Press

MUTING

then

1

and 4 .

1

and 4 for the best vertical center.

ENTER

to save into the memory.

— 19 —

KV-25FS12 / 25FS12C

V. CENTER ADJUSTMENT (VPOS)

Perform this adjustment after performing H. Frequency (Free Run) Check.

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select the VPOS item with

4. Adjust value of VPOS with

5. Press

MUTING

then

1

and 4 .

3

and 6 for the best vertical center.

ENTER

to save into the memory.

H. CENTER ADJUSTMENT (HPOS)

Perform this adjustment after performing H. Frequency (Free Run) Check.

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select the HPOS item with

4. Adjust the value of HPOS with

5. Press

MUTING

then

1

ENTER

and 4 .

3

and 6 for the best horizontal center.

to save into the memory.

H. SIZE ADJUSTMENT (HSIZ)

V LINEARITY (VLIN)

V CORRECTION (SCOR)

PIN AMP (PAMP)

HORIZONTAL TRAPEZOID (HTRP)

V. ANGLE (VANG), V. BOW (VBOW), UPPER PIN (UPIN) AND LOW PIN (LPIN) ADJUSTMENTS

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select VANG, VBOW, UPIN, and LPIN with 1 and 4.

4. Adjust with

5. Press

3

and 6 for the best picture.

ENTER

MUTING

then

to save into the memory.

1. Input a monoscope signal.

2. Activate the Service Adjustment Mode.

3. Select HSIZ with

4. Adjust with

5. Press

MUTING

1

and 4 .

3

and 6 for the best horizontal size.

ENTER

then

to save into the memory.

V. LINEARITY (VLIN), V. CORRECTION (SCOR), PIN AMP (PAMP), AND HORIZONTAL

TRAPEZOID (HTRP) ADJUSTMENTS

1. Input a crosshatch signal.

2. Activate the Service Adjustment Mode.

3. Select VLIN, SCOR, PAMP, and HTRP with with 1 and 4.

4. Adjust with

5. Press

3

and 6 for the best horizontal size.

MUTING

then

ENTER

to save into the memory.

V ANGLE (VANG)

V BOW (VBOW)

UPPER PIN (UPIN)

LOW PIN (LPIN)

SERVICE ADJUSTMENT MODE MEMORY

ENTER

0

Item

then

Item Data

.

Green

0

Red

ENTER

1. After completing all adjustments, press

Read From Memory

Signal Type

Mode

Category

service defl vbow 7

ntsc

vchp

Display

00000000 00000000

— 20 —

5-1. CIRCUIT BOARDS LOCATION

KV-25FS12 / 25FS12C

SECTION 5: DIAGRAMS

• When replacing the parts listed in the table below, it is important to perform the related adjustments.

DY, T505, CRT, IC501 C507,

CB Board

C520, C505, C509, C515, T504, T503, C551, L510, C546, C537, C547, D517, D518, D519, R560,

VB Board

R561, R562, R563, R565, R566,

R567, R525....................A Board

IC1301........................MB Board

• All voltages are in V.

• Voltages are DC with respect to ground unless otherwise noted.

MB Board

K Board

A Board

5-2. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

• All capacitors are in µF unless otherwise noted. pF : µµF 50V or less are not indicated except for electrolytics and tantalums.

• All electrolytics are in 50V unless otherwise speciﬁ ed.

• Indication of resistance, which does not have one for rating electrical power, is as follows:

Pitch : 5mm

Rating electrical power : 1/ 4 W (CHIP: 1/10W)

• All resistor are in ohms.

KW = 1000W MW = 1000KW

•

• All variable and adjustable resistors have characteristic curve B,

• The components identiﬁ ed by

• When replacing components identiﬁ ed by

: nonﬂ ammable resistor.

: fusible resistor.

: internal component.

: panel designation and adjustment for repair.

: earth ground

: earth-chassis

unless otherwise noted.

X

in this basic schematic diagram have been carefully factory-selected for each set in order to satisfy regulations regarding X-ray radiation. Should replacement be necessary, replace only with the value originally used.

Y

, make the necessary adjustments as indicated. If the results do not meet the speciﬁ ed value, change the component identiﬁ ed by adjustment until the speciﬁ ed value is achieved (Refer to Safety Related Adjustment on Page 14).

X

and repeat the

• Readings are taken with a 10MW digital multimeter.

• Readings are taken with a color-bar signal input.

• Circled numbers are waveform references.

• *: cannot be measured

•

REFERENCE INFORMATION

RESISTOR : RN METAL FILM : RC SOLID : FPRD NONFLAMMABLE CARBON : FUSE NONFLAMMABLE FUSIBLE : RW NONFLAMMABLE WIREWOUND : RS NONFLAMMABLE METAL OXIDE : RB NONFLAMMABLE CEMENT : ADJUSTMENT RESISTOR COIL : LF-8L MICRO INDUCTOR CAPACITOR : TA TANTALUM : PS STYROL : PP POLYPROPYLENE : PT MYLAR : MPS METALIZED POLYESTER : MPP METALIZED POLYPROPYLENE : ALB BIPOLAR : ALT HIGH TEMPERATURE : ALR HIGH RIPPLE

The components identiﬁ ed by shading and ! symbol are critical for safety. Replace only with part number speciﬁ ed.

The symbol indicates a fast operating fuse and is displayed on the component side of the board. Replace only with fuse of the same rating as marked.

Part Replaced ( )

: B+line

: B-line

: Signal path

Adjustment ( )

HV HOLD-DOWN R564

— 21 —

Les composants identiﬁ es per un trame et une marque securite. Ne les remplacer que par une piece portant le numero speciﬁ e.

Le symbole indique une fusible a action rapide. Doit etre remplace par une fusible de meme yaleur, comme maque.

!

sont critiques pour la

5-3. BLOCK DIAGRAM (1 OF 2)

KV-25FS12 / 25FS12C

FRONT A/V

VAR/FIX-R

VAR/FIX-L

CN450

MON-L

1

MON-R

2

3

4

OUT-L

5

OUT-R

6

9V

7

GND

8

YUV-L

9

YUV-R

10

V3-L

11

V3-R

12

39

V1-L

13

V1-R

14

MUTE

15

N.C.

16

TV-L

17

TV-R

18

V2-R

19

V2-L

20

IN2

2

IN2A

AUDIO

PROCESSOR

40

IN1

IC404

1

IN1A

3

IN3A

38

IN3

MUTE

Q430 Q431

29

LINE B

12

LINE A

5

IN5A

28

OUT-B

13

OUT-A

18

SCL

19

SDA

(AUDIO PROCESSOR)

BUFFER

Q432

Q433

CN402

3P

1

SCL

2

GND

3

SDA

A

CN460

MON-L

1

MON-R

2

VAR/FIX-R

3

VAR/FIX-L

(POWER SUPPLY)

J205

REAR

AUDIO

OUTPUT

S-VIDEO

AUDIO

J201

L

R

S

CY

34

12

V

L

R

(DEFLECTION)

(TUNER/IF)

(AUDIO)

(MTS)

4

OUT-L

5

OUT-R

6

9V 9V

9V

7

GND

8

YUV-L

9

YUV-R

10

V3-L

11

V3-R

12

V1-L

13

V1-R

14

MUTE

15

N.C.

16

TV-L

17

TV-R

18

V2-R

19

V2-L

20

VIDEO

J202

INPUT

DGC

AC IN

L

AUDIO

R

TU101

TUNER

F MONO O-MONO

SAP LED I-SAP

ST LED I-STEREN

DET-OUT

AFT OUT AFT

RF AGC

CN601

2P

:MINI

DGC

CN602

AC

9V

30V

5V

DATA

CLOCK

MODE O-SAP

VIDEO

L OUT

R OUT

MUTE

D622

D4SB60L-F

AC RECT

STANDBY CIRCUIT

D623

CONVERTER

Q605

PROTECT

Q606

RY602 RELAY

AC POWER

RY601

2

1

DGC DRIVER

1

2

DGC RELAY

Q609

LOW B

T602

F601

1

VDR601

2

3

4

STBY DRIVE

D4SB60L-F

AC RECT

SWITCH

Q608

Q607

CONVERTER

D605

IC601

Q601,Q602

T604

SRT

:STAND BY

1

3

4

D626

5

9

6 8

VIN

OCP/FB

1

Q603

SW

C636

1

2

H DRIVE

3

T603

1

18

5

16

4

15

+B

3

D

4

S

2

PH600

PHOTOCOUPLER

3

17

2

13

14

8

12

7

11

9 10

R645

124

ERROR AMP

21

IC602

10k

LOW B LOW B

+B

RECT

LOW B

RECT

AUDIO

VCC

RECT

+B

5V REG

12 IO

IC604

Q501

V OUT IC502

35

REF OUT

+

E

V

I

R

D

17

5V 9V

9V REG

IC603

AGC

Q101

10

VOL-CTRL

13

Q410

Q411

MUTE

AUDIO AMP

IN3+

11

IN4+

7

IN1+

IC402

8

IN2+

1

OUT1+

4

OUT2-

17

OUT4+

14

OUT3-

T501

V HOLD

4

H OUT

6

Q502

3

IN+1

CNTRL IC501

7

OUT2

Q506,507

2

IN-1

1 T

5

U

IN+2

O

1

Q505

PIN DRIVE

Q503

PIN OUT

Q504

1

4

200V

2

7

8

SW

9

0

OCP

+B

0

T503

0

8

9

1

3

5

T504

HV

T505

FBT

FV

G2

11

ABL

6

DF

H

5

7

4

1

234

CN502

6

H E A T E R

CN506

5

4

9V

3

2

1

+B

RELAY DRIVE

Q604

CN901

5

VM

9V

NC

+B

VM

4

9V

3

E

2

NC

1

+B

D2001

(VELOCITY MODULATION)

AMP

Q903 Q904

9V

IR DETECT

21

IC2001

FUNCTION

SWITCH

TP 506 H OUT

CN902

VM

VM OUT

DRIVE Q905 Q906

VM Q901 Q902

E

VM

1

SPSW

2

VM

STBY +5V

SET5V

30V

SET9V

BA5-902-BD

3

STBY 7.5V

4

GND

5

I-PROT

6

DGC

7

RELAY

8

HP

9

MUTE

10

SEL1

1

2

3

4

5

6

7

8

9

1

2

3

4

1

2

3

4

5

1

2

3

4

5

6

7

8

1

2

3

4

5

6

5

4

3

2

1

AGC MUTE

I-HLDWN

MONITOR

SPK R+

LED-TIMER

POWER-SW

IR(SENSOR)

MENU-SW

STBY +5V

V2(VIDEO2)

R BACK R GO

L BACK

L GO

HP GND

CN2002

SEL0

GND

MAIN1

MAIN2

HD

GND

ABL

EW

VD+

VD-

V3

O-VOL

CN2009

PIP-L

SDAT

SCL

SET5V 30V

SET9V

V1

GND

Y1

C1

+

SPR

CN406

SPK R-

SPK L-

SPK L+

R BACK

R GO L BACK

HP GND

KEY-SW

4P

SPL

+

CN407

L GO

D

CN2001

GND

J401

HEADPHONE

B

C

CN408

V DY+

V DY-

H DY-

H DY+

11

12

13

14

15

16

17

18

19

20

10

11

12

13

14

15

16

17

18

19

20

CN501

STBY 7.5V

TP 508

V OUT

— 22 —

BLOCK DIAGRAM (2 OF 2)

A

B

C

KV-25FS12 / 25FS12C

CN1002

FOR JIG

K

T

D

L

A

N

C

D

I

G

-

B

5

6

I-PROT

O-DGC

O-RELAY

O-MUTE

O-MONO

O-SAP

I-SAP

I-STEREN

I-AFT

O-AGCMUTE

I-HLDWN

O-LED

I-POWER

I-RMCN

I-MENU I-KEY

1

N K L C B

O

CONTROL

TUNING SYSTEM

IC1001

B

4

3

2

VIDEO SW

IC1304

VIDEO1

T

N

U

V

I

1

O

T

0

A

V

M

124375 2 2 731 4109132017

473638

T

N

A

I

D

B

-

1

I O

O-OSDBLCK

O-H TRAP

O-HSYSW

I-HSYNC

I-RESET

O-YUYSW

11

O-SEL1

10

O-SEL0

15

16

24

I-DSC

O-OSC

I-HP

I-SDAT

O-SCLN

O-YM

O-R O-G

O-B

I-VPN

I-CVIN

O-N/S

X1001

25

1

30

37

39 41

49

52

51

50

2

44

22

4

6

STBY +5V

REG

IC1305

2 O E D I V

RESET

Q1325,1326

HSYNCH SW

H C

N

I

1

Y

1

A

S

Y

M

H

BUFFER

Q1010

HSYNCH

SEP

Q1009

HP

X1304

DIG COMB

FILTERIC1002 IC1302

N

T

L

A

N

I

U

C

D

I

K

O

S

A

C

Y

41

CVBS2

VM OUT

Q1330

BUFFER

Q1302

BUFFER

Q1310,1311

Q1312

BUFFER

Q1313

BUFFER

Q1332,1327

Q1328,1329

Q1354,1306

Q1307,1308

15

VM

18

HP PROTECT

35

SDA

34

SCL YS2/YM

32

R2IN

31

G2IN

30

B2IN

5

VTIM

36

YUYSW

19

HD

42

ABLIN

11

EW

13

VD+

Y/C JUNGLE

IC1301

43

V/FSC

4

Y1

2

C1

6

MONOUT

7

BUFFER

COMB C

9

COMB Y

46

XTAL3

47

XTAL2

(TUNING CONTROL)

(Y/C/J)

(RGB DRIVE) (CRT DRIVE)

N/S MUTE

Q700

IK BUFFER

21

IKIN

Q1331,1350

BUFFER

20

AFCFI

ROUT GOUT

BOUT

VD-

Q1336

22

R,G,B OUT

23

Q1317,1316

24

Q1315

CONVERGENCE

Q1301

H TRAP

Q1011,1002

14

CN1303 CN705

1

IK IK GND

2

R

3

B

4

G

5

6

GND N/S

7

NS MUTE

8

H TRAP

9

NS MUTE H TRAP

1

GND

2

R

3

B

4

G

5

6

GND N/S

7

8

9

N/S MUTE

5

IK

3

R IN

2

B IN

1

G IN

NS IN

1

CRT DRIVE

N/S DRIVE

IC1701

IC702

7

R OUT

8

B OUT

9

G OUT

Q701

CN701

2

4

N/S COIL -

1

N/S COIL +

3

KR 12

KB 10

KG 11

FOCUS

CN704

1

G2

6

HEATER CN706

PICTURE TUBE

H

G2FV

HV

CN1000

3P

1

SCL

2

GND

3

SDA

MEMORY

IC1003

BUFFER

Q1001

1

SPSW

2

VM

3

STBY 7.5V

4

GND

5

6

DGC

7

8

HP

9

10

11

12

13

14

15

16

17

18

19

20

BUFFER

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

1

2

3

4

5

STBY +5V

6

7

8

Q1003

SET5V

30V

SET9V

17 13

8

5

46

42

43

45

33

48

35

18

14

12 34

32

CN1004

CN1003

CN1001

STBY 7.5V

I-PROT

I-STEREN

AGC MUTE

I-HLDWN

MONITOR

POWER-SW

IR(SENSOR)

MENU-SW KEY-SW

STBY +5V

V2(VIDEO2)

RELAY

MUTE

SEL-1

SEL-0

GND

O-MON0

O-SAP

I-SAP

MAIN 1

MAIN 2

AFT

HD

GND ABL

EW

VD+

VD-

V3

O-VOL

PIP-L

SDAT

SCL

SET5V

30V

SET9V

V1

GND

Y1

C1

LED

GND

D

V DY(+)

V DY(-)

H DY(-)

H DY(+)

BA5-902-BD

— 23 —

A BOARD SCHEMATIC DIAGRAM

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |

A

STEREO

—

TP100

RF-AGC

B

—

C

—

CN2009

20P

C219

10

C104

470 25V

5.6V

L102

:CHIP

R105

4.7k CHIP

2SD601A

TO MB BOARD

0V

V I D E O

D

—

E

—

F

CN1003

I-HLDWN

MONITOR

O-VOL

PIP-L

SET-5V

SET-9V

SDAT

1

HD

2

GND

3

ABL

4

5

EW

6

VD+

7

VD-

8

9

V3

10

11

12

13

SCL

14

15

30V

16

17

V1

18

GND

19

Y1

20

C1

—

G

—

H

—

V I

I

D E O

—

CN602

2P

J

—

K

AC IN

TO HZ BOARD

CN902

AC IN

CN601

2

1

2P

1

DGC

2

DGC

—

V

L

—

M

—

N

—

CN2002

TO MB BOARD

CN1004

STBY-7.5V

I-STEREN

AGCMUTE

20P

SPSW

I-PROT

DGC

RELAY

MUTE

SEL1 SEL0

GND

O-MONO

O-SAP

I-SAP

MAIN1

MAIN2

AFT

1

2

VM

3

4

GND

5

6

7

HP

8

9

10

11

12

13

14

15

16

17

VIDEO

18

19

20

I D E O

O

—

P

—

Q101

KV-25FS12 / 25FS12C

CN460

C513

0.001 100V

L

T I N O M

1

C403

0.22

R436

6.8k CHIP

JW(5mm)

B

R543 220k

:CHIP

R438

6.8k CHIP

L602

1.8V

9V

4.7 250V

C512

0.047 200V

1SS133T-77

C534

C531

0.068 200V

20P

TO K BOARD

CN450

R437

4.7k CHIP

LOW B

C510

+B

D516

:4A

R554

10

10k

135.5V

2SA1091O-TPE2

C533

470 25V

:PT

+ 1 T U O

1 2 3 4 5 6 7 8 9

AUDIO-L

(+)OUT

PS401

2.7A/150V

C402 2200

25V

AUDIO-L

C420

0.22 25V

F

C421

0

25V

R441

22k

R440 100k 10k

CHIP

C441

+B

9V

R506

L502

68 2W

2.2mH

C550

C511

0.15

0.82 250V

250V

L505

R513

33 3W

SW502

D511

RGP10GPKG23

200V REG

1

47

4

L510

2

7

R568

22 2W

:RS

8

R550

9

0.47 1/2W

:FPRD

0

Q505

R544

C553

22

0.5W

250V

C551

0.0047 200V

R555 470k

OCP

D514

RGP15GPKG23

+13V REG

13V

1 D N G P

AUDIO-L

(-)OUT

C496

Q410

2SD601A

VOL-CTRL

1

16V

F

+B

JW507

5.0MM

200V

DF

IC402

TDA8580Q/N1 AUDIO AMP

Y

-

B

1 p V

G

2

D

A

T

N

I

U

A

D

O

T S

AUDIO-R

0

R401 R402

20k

CHIP

AUDIO-L

(+)OUT

LOW B

C442

R447

4.7

4.7k

MTZJ-T-77-10B

5.2V

GP08DPKG23

T505

FBT

CHIP

D401

R445

D502

D503

HV

FV

G2

0V

JW7.5MM

R442

100

CHIP

R552

68 3W

R542

+ 1 N I

R

+

E

4

3

2

F

N

F

I

U B

10 11 12 13 14 15 16 17

R426

22 CHIP

10k

CHIP

5.3V

C435

0.22 25V

CHIP

TP 508

V OUT

R446

33k

R454

100

5.2V

2SB709A

VOL-CTRL

R490

4.7k

AUDIO-L

(-)OUT

Q411

C401

100

8

TP506

H OUT

TP504

9

200V

200V200V

5 N I

T U M

5

4

3

2

1

6

5

4

3

2

1

2

3

p

T

V

U O

AUDIO-R

(+)OUT

AUDIO-R

(-)OUT

JW414

5.0MM

AUDIO-L

(+)OUT

AUDIO-R

(+)OUT

AUDIO-L

(+)OUT

C439

330 25V

R428

220

CHIP

CN506

5P

TO VB BOARD

CN901

VM

9V E

NC

+B

CN501

6P WHT :DY

V DY +

V DY -

H DY -

H DY +

CN502

6P :S-MICRO

TO CB BOARD

4

D

T

N

U

G

O

P

SPR

SPL

C438

330 25V

R427

220

AUDIO-R

AUDIO-L

RD9.1EW-T1

AUDIO-R

(+)OUT

CN406

4P

1

SPK R+

2

SPK R-

3

SPK L-

4

SPK L+

CN407

5P

TO A BOARD

CN408

1

R BACK

2

R GO

3

L BACK

4

L GO

5

HP GND

J401

HEAD PHONES

CN408

5P

TO A BOARD

CN407

1

R BACK

2

R GO

3

L BACK

4

L GO

5

HP GND

H.DY H.DY V.DY V.DY

+

2

-

E

CN706

6

200V

5

NC

4

E

3

HEATER

2

-13V +13V

1

HV

TO CRT

FOCUS

TO CB BOARD

G2

TO CB BOARD CN704

-13V

ABL

11

R535 100k

JW7.5MM

6

H

5

R545

13V

(POWER SUPPLY)

(DEFLECTION)

(TUNER/IF)

(AUDIO)

(MTS)

BA5-902-A

L

R

-

R

L

R

-

2

V

T

9

8

0

1

2

D2003R237

RD9.1EW-T1220

R430

1k

CHIP

V

0

9

3

C

V

E

V

L

K

5

B

A

C

A

T

O

C

N

A

L

C

E

D

C

V

R107

100

P

:CHIP

I H C :

C102

100

R108

100

1 0

:CHIP

1 L

T

C

U

V

T

G

O

9

U

A

O

T

C

U

F

O

R

I

C105

47

25V

C

F

C

N

A

V

TP102

DET OUT

L103

:CHIP

T

D

2

U

D

E

T U

O

T

E

E D

D

O

E

L

E

P

D

T

A

O

S

M

T

N O M

F

T

U

E

U

O

D

T

O

M

U

S

M

R

L

PIN21

R115

0

PIN22

PIN19

9V

5V

AGC

30V

VIDEO

C101

0

C204

0.0047 B:CHIP

R204

22k

:CHIP

R205

33k

:CHIP

9V 9V9V 9V

5V

TP101

BTF- WA412

STEREO

0

0.3 4.9

C100

0

16V

F

TU101

TUNER

C215

1

R421

4.7k

R422

4.7

D2SB60A-F04

AC RECT

R603 470k

ERA22-08TP3

1SS133T-77

R611

47k

D623

JW(5MM)

:RN

D624

D625

1SS133T-77

C637

0.001

FB608

D1NL20R

C639

22

TH601

D622

C641

10

450V

40.8V

Q605

2SK2663

CONVERTER

S

-35.6V

36.8V

7 1 6 D

C638

-35.3V

470p

-36.1V

R612

680

Q606

2SD601A

R616

6.8

1/2W

SET 9V

SW

-36.3V

R602

4.7

:FPRD

C635

0.001 CHIP

R617

22

C

D618

2 1

1SS133T-77

7 7

T

J Z T M

C643

0.047

R608

22M

1/2W

R609

1k

R610

10k

CHIP

MTZJ-T-77-7.5A

C604

0.0033

C634

0.01 250V

D627

R614

470

D628

T604

SRT

STANDBY

RECT

1

3

4

5

6 8

V

J202

3P

FRONT A/V

INPUT

FB607

JW(5MM)

9

D1NL20U-TA

C636

D626

330

L

R

STBY-7.5V

J205

2P

AUDIO OUTPUT

R429 470k CHIP

D230

RD9.1EW-T1

AUDIO-R

AUDIO-L

C216

4.7

CHIP

R235 470k CHIP

R238

C210

220

4.7

CHIP

R239 470k CHIP

R

L

R433 470k CHIP

RD9.1EW-T1

MTZJ-T-77-10B

R431

1k

CHIP

D231

MTZJ-T-77-10B

D213

D212

C214

1 16V

16V

CHIP

AUDIO-R

AUDIO-L

SAP

MONO

0.3

4.9

0

MONOSTEREO

5.00

R

L

V T

7 1

L

E

.

-

T

C

1

U

.

V

M

N

6

5

4

3

1

L

R

L

-

D

-

3

V

2

1

V

N

V

9

U

G

U

Y

0

9

8

7

1

9V

R

T U O

6

AUDIO-R

L

T U O

5

AUDIO-L

-

X

-

X

I

T

I

F

I

F

/

N

/

R

O

R

A

M

A

V

4

3

2

AUDIO VCC

SET 9V

R639

2.2k

R640

C549

18

16

15

17

13

14

12

11

10

1k

RGP15GPKG23

R563 100k

C546

4.7

160V

220 16V

D616

D5LC20U

LOW B RECT

JW615

5.0MM

JW616

5.0MM

C627

250V

C548

33

160V

+B

D513

-13V REG

13V

JR472

5.0MM

D615

RU4AM-T3

+B RECT

D620

D5LC20U

AUDIO RECT

0.1

C537

4.7

D519

EL1Z-V1 :4G

C547

0.01 F

C621

1500p

2kV

IC602 EA135-F12 ERROR AMP

3

JW523

10.0MM

R562

10k

D520

MA111-TX

AUDIO VCC

TP600

R645

FB610

10k

0UH

FB604

0UH

C623 680p

C624

500V

100

160V

C622 680p 500V

FB605

0UH

C625

15000

25V

R659

10

12

B+

L603

C654

10 160V

R652

JW(5MM)

FB606

0UH

C626 1000

25V

L601

JW(5mm)

C658

15000

25V

+B

TP507

L504

V MID

R507

1k

1/2W

9V

L503

L506

10mH

+B

0.47 2W

R549

0.47

134.9V

R557

R556

470k

1.2k

+B

R558

R559

100k

10k

R533

47k

-13V

R534

18k

R532

4.7k

R566

10k

CHIP

R546

0.47

WHEN REPLACING T505 BE SURE TO CHECK THE VOLTAGE VALUE

AT (TP503). REFER TO THE SAFETY ADJUSTMENT SECTION

R564 SEE SECTION 3.

D204

MTZJ-T-77-30D

30V REG

:40

C

9V

C205

4.7 :CI

S

34

12

TP602

SET+5V

12

R648

3

C657

47

IC604

25V

LM7805CT

STBY +5V REG

30V

R210

R215 470k

:CHIP

D205

RD9.1EW-T1

J201

4P

S-VIDEO

RD9.1EW-T1

75

RD9.1EW-T1

D208

C207

2.2

C208

R214 470k CHIP

Y

V

L

R

UDZ-TE-17-9.1B

F601

*

JW622

7.5MM

JW621

7.5MM

33 3W

R208

15k 2W

D206

2.2

D209

JR(7.5MM)

+B

D210

MTZJ-T-77-10B

R664

STBY-7.5V

D2004

MTZJ-T-77-5.1C

9V

LOW B LOW B LOW B

STBY-7.5V STBY-7.5V

JW(5MM)

LOW B

D619

0.0047

D607

R620

T501

HDT

0.7V

C647

250V

R623

470 0.5W

R624

10k

1k

9V

4

6

C525

500V

Q504

2SC4159-E

PIN OUT

MTZJ-T-77-10B

2SD601A-QRS-TX

C613

10

R520

47 1W

C521

2200p

500V

47p

R637

-32.9V

R625 47k

C509 680p

2kV

C515 680p

2kV

C508

0.01 100V

R504

7.5MM

0V

R655

1k

CHIP

Q608

SW

R662

*

3W

C612

*

2SC3311A

C505 150p

133V

0V

3

R548

JW7.5MM

L501

8mH

D506

RGP10GPKG3

-6.5V0.1V

FB502

1.1UH

R607

22

Q607

R636

JW610

JW609

C607

JW607

7.5MM

JW608

7.5MM

2SB709A

S2007

UP/DOWN

2.2k CHIP

R2002

1.5k CHIP

JW602

12.5MM

JW603

JW606

JW604

12.5MM

*

R508

22k

0V

Q507

SW

0V

R572

4.7k

:CHIP

R2001

R2004

6.8k CHIP

D602

1SS133T-77

RY602 RELAY

AC POWER

C606

2200p 250V

R601

*

R571

2SD2144S-TP-UVW

4.7k

:CHIP

0V

Q506

2SD601A

MENU/SEL

47k

SW

S2008

R661R663

4.1V

2.2k22k

0V

R642

0.1V

Q604

2SD601A-QRS-TX

RELAY DRIVE

C506

0.001

2SD2144S-TP-UVW

STANDBY DRIVER

0.1V

C601

0.1 25V

CHIP

D612

MTZJ-T-77-10B

2200p

R615

C611

250V

0.7V

C602

47

*

C610

Q601 Q603

SW

-33.1V

D603

MTZJ-T-77-33B

C609

100

R618

82k

9V

R547

JW7.5MM

R502

820

3W

R509

820

R510

3W

330

C535

0.47

2

C502

0.047 200V

1

C501 330p

0V

TP500

H.DRIVE

9V

R501

3.3k

Q503

2SD601A

PIN DRIVE

R522

680

3.8V

0.2V

R523

10k

R653

1k

CHIP

D4SB60L-F

R621

6.8 10W

10

-33V

R622 100k

RGP02-17PKG23

C503 820p 500V

V 9 . 3 9

Q501

2SC3209LK

H DRIVE

:1B

AC RECT

D604

R503

5.6k

D605

R619

47k

C526

R521

330

R630

2.2k

D606

TF541M

MTZJ-T-77-20B

+B

1

2

3

C504

680p 500V

1

D608

1SS133T-77

R627

R628

Q602

SW

-32.8V

C507

19000p

2kV

4

C524 220p 500V

R631

R656

10k

R626 D400

0.47 1/2W

:RF

R660

*

3W

*

-23.6V

D501

ERC06-15S

D505

RU4AM-T3

Q502

2SD2578-YB

H-OUT

FB501

1.1UH

C540

22

160V

FB503

1.1UH

+B

B

C539

22

160V

TP601

C527

22

13V

D2002

MTZJ-T-77-10B

SET+9V

THP601

THERMISTOR

1

4

L605

*

13.9V

0V

R634

10k

CHIP

2

3

R650 R658

0.68 0.68

D601

1SS133T-77

RY601 RELAY

R635

2.2k CHIP

JW613

5.0MM

C648

JW614

0.22

5.0MM

125V

Q609

2SC3311A-QRSTA

+B

9V

DGC DRIVER

C655

0.47

R613

2.2M

FILTER

T602 LINE

LOW B

L604

IO

IC603

PQ09RD21

9V REG

IC2001

SBX3081-71

IR DECT

G

C628

100 25V

9V

+B +B+B

123

R2003

4.7k

C2001

STBY-5V

47

25V

STBY-7.5V

VDR601

VARISTOR

+B

LNK0220022G1

*

D2001

STBY-5V

S2006 POWER

D2005

MTZJ-T-77-5.1C

1

2

3

R

W

R

E

S

O

M

-

S

I

R

N

T

E

-

W

S

D

O

R

E

P

I

L

7

4

W S

U N E M

8

5

6

V

W

5

S

-

Y

B

E

T

K

S

CN2001

D N G

8P

TO MB BOARD

CN1001

2 V

R2014 R2013 R2012 R2011

6.8k 2.2k 820 680

S2005 S2004 S2003 S2002 S2001

TV/VIDEO CH+ CH- VOL+ VOL-

C615

*

D609

*

C616

*

FB600

0UH

FB609

C618 470p

C520

0.056 400V

0UH

C617 680p

B

1.5kV :PP

R649

R651

10k

D504

ERC06-15S

C516

0.001 2kV

C514

0.75 250V

R540

10k

1k

+B

MTZJ-T-77-5.1C

+B

IC601

*

D1S4-TA

N I V

D610

S

D

12345

FB602

0UH

R632

0.22 2W

-23.6V

2SA1309A-QRSTA

B F / P C O

R641

0.27 2W

SW

FB601

0UH

-23.6V

CONVERTER

D N G

-31.2V

C614

0.1

R516

10k

D509

5

E V

+

I

C

R

C

D

V

1 2 3 4 5 6 7

R519

R538

10k

470

2W

R536

1.5 1W

R541

C542

10k

47

R633

680

0 1

1

T504

HLT

IC502

TDA8172

V OUT

F E R

C541

220

13V

R525

D507 D508

1SS133T-77

6.8k CHIP

:4A

R524

R528

2.2k

10k

1SS133T-77

:4A

C528

0.0022 B:CHIP

R526

22k

*

R638

4

3

PC123FY2

R560

47k

1W

:RS

8

7

6

5

C530

0.001 CHIP

*

PH601

1

5

4

3

2

8

7

9

1

2

-13V

TP503

H.PROT

:CHIP

IC501

NJM2903M-TE2

V CONTROL HOLD

:HC

C523

470 25V

R564

82k

CHIP

R567

10k

R565

10k

T603

R644

3.3k

D613

D1NL20U

FB603

D611

R646

D1NL20U

1.5k

R643

1.5k C652

C619

0.001

470p

:PT

0UH

D614

D1NL20U

C620

100 25V

PHOTOCOUPLER

9V

T503 :PMT

7

8

9

3

4

345

1

2

6 7

T

C C V

S O O B

OUT

R518

10k

D510

C543

GP08DPKG23

0.47

R539

2.2

FPRD

-13V

R527

18k

CHIP

C529

0.0022 B:CHIP

330k CHIP

R529

D518

RD8.2ES-T1B

D517 R553

1SS133T-77

:4A

R561

620

TP501

-13V

+ E V I R

-13V

D

R517

10k

TP502

+13V

OUT1

+VCC

1

IN-1

OUT2

2

IN+1

IN-2

3

-VCC

IN+2

4

R530 33k CHIP

— 24 —

(*) A BOARD VARIANT MODEL LIST

REF. NO. LOC. KV-25FS12 KV-25FS12C

C607 G-6 0.47µF 125V # C612 G-8 680µF 250V 560µF 400V C615 E-9 # 0.022µF 400V C616 H-9 # 220PF 1KV

D609 H-9 # RU-1P

F601 H-5 6.3A/125V 6.3A/250V

IC601 E-10 STR-F6426 STR-F6456

R601 G-6 4.7M 1/2W # R615 G-6 # 8.2M 1W R627 G-9 390K 270K R628 G-9 # 270K R631 E-9 # 100K 3W R637 H-8 # 5.6K 3W R638 H-11 33 56 R660 H-9 15K 3W 5.6K 3W R662 H-9 # 5.6K 3W

T603 E-11 1-433-806-11 1-433-807-21 THP601 H-5 1-809-539-11 1-803-540-11 VDR601 H-5 ENE271D-10A ENE621D-14A

Note: # = NOT MOUNTED

KV-25FS12 / 25FS12C

A BOARD WAVEFORMS

1

2.5 Vp-p (H)

5

30.4 Vp-p (V)

9

174.3 Vp-p (H)

32

182.8 Vp-p (H)

6 8

54.3 Vp-p (V)

23.4 Vp-p (H) 1.08 KVp-p (H)

7

31.1 Vp-p (V)

4

5.0 Vp-p (V)

— 25 —

volt

A BOARD IC VOLTAGE LIST

KV-25FS12 / 25FS12C

IC402 IC501 IC601 IC604 TU101

pin volt pin volt pin volt pin volt 15 N/C

1 6.8 1 0.2 1 -31.8 1 13.3 1 8.6 16 N/C 2 GND 2 3.7 2 -32.7 2 5.0 2 30.7 17 4.7 3 14.1 3 2.5 3 53.2 3 GND 3 5.1 18 4.4 4 6.8 4 GND 4 -23.8 4 4.9 19 5.0 5 4.3 5 9.5 5 -32.7 pin volt 5 4.9 20 5.0 6 N/C 6 10.1 1 5.0 6 GND 21 0.3 7 4.1 7 0.1 pin volt 2 5.0 7 5.5 22 0.0 8 4.1 8 14.0 1 135.9 3 GND 8 N/C 23 N/C 9 6.8 2 123.4 9 8.9 24 0.0

IC502

10 4.1 pin volt 3 GND 10 4.1 25 N/C 11 4.1 1 2.1 11 GND 26 4.5 12 4.1 2 14.0 pin volt 12 N/C 27 4.5 13 5.2 3 -12.6 I 13.3 13 N/C 14 6.8 4 -13.9 G GND 15 14.1 5 0.2 O 8.9 16 GND 6 14.3 4 13.3 17 6.8 7 2.1

A BOARD IC BLOCK DIAGRAMS

14 N/C

IC2001

IC602

All voltages are in V

IC603

All voltages are in V

IN 1

IN 2

IN 3

IN 5

IN 4

MUTE

STANDBY

IC402: TDA8580Q/N1

7

60

k

60

k

60

k

60

k

8

V

10

12

11

13

5

TDA8580Q/N1

px

30 k

BUFFER

INTERFACE

V

P1

P2

3

15

+

V/l

-

45 k

-

OA

+

1

OUT 1 +

IC502: TDA8172

+

16

OA

-

45 k

BUFFER

45 k

-

OA

+

OA

-

45 k

DIAGNOSTIC

+

V/l

-

V

px

45

k

45

k

+

V/l

-

+

V/l

-

2

4

OUT 2 -

9

BUFFER

Non-Inv. Input

14

OUT 3 -

17

OUT 4 +

6

DIAG

Inv. Input

1

7

TDA8172

Supply Voltage

2

Power Amplifier

Output State Supply

6

4

Gnd

Flyback Generator

3

Flyback Generator

Thermal Protection

5

Output

PGND1

PGND2

— 26 —

A

R

—

B

—

C

—

D

—

E

—

F

—

G

—

H

—

I

[POWER SUPPLY, DEFLECTION, TUNER/ IF, AUDIO, MTS]

A

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |

G

N

D

2

C

N

4

0

L

R

2

3

8

C

N

5

0

R

2

3

9

C

R

2

3

5

D

R

2

3

6

S

2

0

8

S

2

0

7

R

B

K

R

G

O

L

B

K

L

G

O

5

G

N

D

4

0

D

0

S

2

0

2

S

2

S

2

S

2

0

S

2

0

3

6

0

2

0

D

0

4

0

3

0

2

0

2

R

0

1

0

5

2

1

R

0

5

3

1

2

1

0

1

2

3

7

C

2

1

2

R

2

0

1

N

C

5

0

2

D

1

L

E

D

-

T

I

M

E

R

P

O

W

E

R

-

S

D

2

1

3

1

6

0

3

R

2

0

Q

6

C

W

I

R

T

O

M

A

/

M

E

N

U

Y

K

E

S

T

B

Y

-

5

V

2

G

N

D

Y

2

G

N

D

C

2

0

7

B

E

0

7

R

6

5

3

0

6

2

R

6

5

1

8

0

4

2

0

D

0

1

C

2

0

N

0

4

R

2

0

5

1

R

6

0

9

2

6

4

D

R

6

1

4

D

2

6

7

A

3

.

6

R

E

P

L

A

C

E

F

U

S

E

A

S

M

A

R

K

E

D

R

I

S

K

O

F

I

R

E

2

J

R

2

0

1

L

E

D

-

M

A

I

N

1

3

R

6

5

1

C

N

2

0

1

B

O

A

R

D

C

N

C

N

6

C

N

6

0

4

T

H

P

6

0

1

R

Y

6

0

T

H

6

0

1

C

6

4

0

T

6

0

4

S

6

T

.

9

6

C

G

0

5

Q

6

R

0

F

6

A

L

3

1

E

B

Q

6

0

2

4

D

0

6

R

6

1

8

D

6

0

6

0

3

0

1

C

6

3

6

1

7

Q

3

R

6

2

3

D

C

6

0

8

C

6

0

5

R

Y

6

0

2

6

0

6

1

A

C

I

N

C

N

6

0

2

A

C

I

N

C

6

1

3

0

6

7

R

5

6

1

R

4

6

C

6

1

6

D

-

5

0

6

D

C

6

4

7

C

0

6

0

1

T

6

3

C

0

6

T

6

0

2

0

1

V

D

R

6

7

.

5

V

S

T

B

6

3

1

C

6

3

0

C

6

1

4

R

6

3

2

7

9

0

6

R

6

2

Y

R

6

3

Q

6

0

4

E

B

R

Q

6

0

1

9

C

6

1

F

6

2

B

0

3

6

3

R

F

B

6

0

1

6

0

9

F

B

7

C

6

4

6

+

C

6

0

6

C

N

5

0

6

C

N

5

1

+

B

I

C

6

0

1

4

5

2

D

3

6

1

6

5

C

R

6

4

7

1

8

1

0

6

R

0

F

B

6

1

6

4

C

2

H

.

C

6

1

C

5

6

4

C

1

5

3

R

0

5

R

5

1

R

6

5

1

5

C

5

3

6

D

2

5

1

5

4

C

2

0

R

J

R

6

3

4

9

Q

5

0

7

6

4

R

0

J

6

3

R

0

6

C

F

B

6

0

3

C

B

Q

6

0

3

9

1

R

6

4

C

6

5

2

6

1

D

1

R

6

4

3

R

4

R

6

3

5

1

9

C

N

2

0

8

3

2

4

R

C

N

2

0

R

E

2

5

0

8

C

6

2

7

R

4

3

C

N

2

0

7

R

4

2

1

0

Q

4

C

6

2

5

H

0

P

6

1

I

6

2

C

0

L

C

4

0

3

O

I

9

2

8

C

6

2

6

0

D

9

C

4

6

0

1

R

6

5

C

6

5

9

D

R

I

V

E

N

5

1

9

6

D

1

T

5

0

3

L

6

0

2

0

5

C

6

2

9

4

0

5

T

9

0

5

H

.

P

U

L

S

E

R

5

0

7

L

C

5

1

3

0

5

2

L

5

0

5

L

4

0

2

T

5

7

R

5

2

4

C

5

0

3

2

R

0

5

7

R

4

Q

5

0

1

5

0

4

5

4

R

0

E

R

5

0

5

C

5

2

Q

0

H

-

O

U

T

5

C

0

5

C

1

L

5

3

R

5

D

E

T

-

O

U

T

1

3

1

2

5

2

1

2

3

7

C

6

0

1

I

6

4

C

0

R

5

6

C

4

5

7

R

4

Q

4

1

R

4

0

R

L

5

R

1

4

9

V

4

0

2

R

9

4

9

4

C

R

4

5

4

5

1

2

C

5

2

7

5

0

6

C

5

0

1

C

0

I

4

5

6

R

4

6

C

4

8

J

R

5

0

3

R

5

Q

0

5

3

R

4

7

0

7

D

5

R

5

R

5

F

B

5

0

C

5

2

4

0

5

6

D

1

0

R

2

0

4

1

5

R

1

2

1

7

1

3

1

5

L

1

0

3

S

E

T

1

4

0

R

9

R

4

3

6

R

4

5

0

6

7

R

5

6

R

5

2

5

4

1

4

2

C

I

R

5

2

8

1

R

5

2

E

B

E

C

2

5

6

1

0

C

N

2

0

6

R

1

0

6

1

5

R

1

Q

1

0

1

7

I

4

2

C

0

4

C

4

5

R

4

3

0

C

5

2

9

R

5

1

0

5

R

3

5

1

4

7

R

5

3

9

R

5

1

8

C

5

4

3

1

6

0

5

G

N

D

6

R

A

G

C

N

4

0

7

G

N

D

L

G

O

K

L

B

R

G

O

R

B

K

1

N

0

C

4

6

4

R

4

3

9

5

1

R

4

3

8

R

5

6

C

5

4

5

3

R

7

C

5

4

1

5

0

D

1

6

4

6

7

R

5

4

0

C

5

1

9

R

5

3

7

5

H

0

T

2

0

1

5

1

D

C

5

2

1

S

D

A

T

6

1

0

2

J

R

4

C

4

8

1

3 6

2

S

1

2

3

L

1

0

1

5

V

L

1

0

2

C

0

1

2

C

2

0

5

3

0

V

1

4

0

I

C

4

0

5

8

1

4

I

C

4

0

6

5

4

R

0

4

Q

0

4

1

R

0

J

4

9

4

3

R

0

H

.

P

R

O

T

C

5

4

2

C

5

1

8

-

1

3

2

5

0

2

I

C

1

R

5

4

3

0

J

5

R

2

0

3

J

R

6

0

V

6

V

D

Y

-

V

D

Y

B

4

3

C

+

5

H

D

Y

-

H

D

Y

-

C

N

1

2

8

0

1

C

N

2

0

5

2

8

D

0

C

L

S

E

T

2

R

2

D

3

D

2 C

2

R

2

0

4

7

R

C

1

2

1

5

Q

0

2

Q

0

2

6

D

3

2

V

R

2

3

R

3

5

2

5

R

1

C

N

5

0

2

H

E

A

T

E

R

2

+

H

D

9

C

0

5

1

0

6

5

8

R

1

R

5

3

C

5

1

Y

H

D

Y

+

R

5

4

1

N

0

C

5

R

5

4

6

R

5

3

4

5

L

5

0

7

6

7

-

7

-

2

9

5

-

1

2

0

9

6

0

2

D

5

0

2

D

1

2

0

D

0

1

2

R

5

0

1

9

0

2

5

5 3

4

1

3

1

8

Q

0

2

1

2

6

D

3

2

R

2

3

1

2

D

3

2

3

R

5

D

1

6

D

1

5

4

C

5

3

2

1

3

5

V

R

D

R

R R

5

1

8

7

D

1

5

8

R

5

Q

0

5

4

R

5

R

0

8

0

8

1

R

0

2

R

0

8

3

0

8

R

0

8

4

0

5

N

C

KV-25FS12 / 25FS12C

4

1

A BOARD LOCATOR LIST

DIODE D618 G-2

D204 B-10 D619 D-2 D205 A-11 D620 E-7 D206 A-11 D622 F-3 D208 B-11 D623 F-3 D209 B-11 D624 H-2

2

1

5

J

0

2

1

2

1

3

0

2

6

2

4

0

2

4

1

2

6

2

7

D

2

5

0

R

5

9

R

5

7

R

5

6

D

1

R

5

3

5

J

U

M

P

E

R

-

I

D

T

5

0

T

F

B

D210 B-11 D625 G-2 D212 B-11 D626 G-2 D213 B-2 D627 H-2 D230 D-11 D628 G-2 D231 D-11 D2001 E-2 D400 E-1 D2002 F-1 D401 E-8 D2003 B-1 D501 H-8 D2004 A-3 D502 G-9 D2005 A-2 D503 G-9 IC D504 H-9 IC402 D-9 D505 G-7 IC501 D-9 D506 E-8 IC502 F-10 D507 E-8 IC601 B-5 D508 E-10 IC602 C-7 D509 H-5 IC603 E-7 D510 E-10 IC604 C-8 D511 G-10 IC2001 F-1 D513 F-10 TRANSISTO D514 F-11 Q101 B-9 D516 G-12 Q410 B-7 D517 F-11 Q411 D-8 D518 F-11 Q501 H-6 D519 E-10 Q502 H-7 D520 F-12 Q503 D-8 D601 D-2 Q504 E-9 D602 E-2 Q505 G-11 D603 B-3 Q506 A-6 D604 A-3 Q507 A-6 D605 D-4 Q601 B-3 D606 B-3 Q602 A-3 D607 B-4 Q603 C-6 D608 B-4 Q604 A-5 D609 D-4 Q605 G-3 D610 C-4 Q606 G-3 D611 C-6 Q607 D-2 D612 C-2 Q608 E-2 D613 D-6 Q609 A-4 D614 D-6 D615 F-5 D616 F-6

D617 G-2

— 27 —

CB BOARD SCHEMATIC DIAGRAM

1 | 2 | 3 | 4 | 5 | 6 | 7 |

R717

A

2.2 2W

KV-25FS12 / 25FS12C

CRT

27V: TIGER

KG G2

KB

—

B

—

C

—

D

—

E

—

F

—

G

—

H

—

FOCUS

TO A BOARD

T505

CN704

CN705

O MB BOARD

CN1303

N/S MUTE

CN706

TO A BOARD

CN502

HEATER

9P

H-TRAP

6P

200V

N.C.

GND

-13V +13V

R718

H

3.3

2W

HV

N/S COIL

CN702

:PIN-J

CN701

N.C.

E

3P

COIL+

CV KR G1 G4

R716 100k

1

G2

1

IK

GND

2

3

R

B

4

G

5

GND

6

N/S

7

8

9

6

5

4

3

2

1

200V

0.0047

C707

2kV

TP47R

TP47B

E

R720

2.2k

R721

2.2k

(RGB DRIVE)

(CRT DRIVE)

0.0V

R OUT

B OUT

13V

0.3V

0.0V

C704

4.7

250V

L701

1.7V

1/2W

RV701

V STAT CONTROL

D704

RGP10GPK23

N

I

G

B

1 2 3 4 5 6 7 8 9

2.2V

C705

10

250V

G

C710 C709

10 220

Q701

2SC3311A

NS MUTE

2SC3311A

-13V

Q700

NS MUTE

R700

22k

110M

TDA6108JF/N1B

V

N

0

2

I

.

2

R

B

C708

0.1

:MPS

IC702

RGB DRIVE

1

V 6

D

.

N

3

K

G

I

C706

0.1

250V

16V

R705

10k

:CHIP

2

3

T

U

O

D D

R

B

V

G

134.5V

1

3

4

8

4

R710

.

5

4

V

R709

100

R708

100

1SS83TD

200V

R701

10k

0.3V

R702

220

G4

CV

1

13

G1-3

KR

R

R712

1k

1/2W

100

D702

IC701

LA6500-FA

N/S AMP

0.3V

1 2 3 4 5

-13V

J701

3 5

G

D701

1SS83TD

-0.6V

C701

25V

G2

G1-1

6

7

H1

H2

8

9

G1-2

101112

KB

KG

R715 560k 1/2W

B

R713

1k

1/2W

R711

1k

1/2W

D703

1SS83TD

13V

C703

47

25V

R704R703

2.2k100

C702

0.1

:MPS

R707

1.5

:FPRD

47

R719

220

2W

R706

1

R714

100

1/2W

1

N/S COIL-

2

3

N/S

— 28 —

BA5-902-CB

KV-25FS12 / 25FS12C

CB

A

—

B

C

N

—

C

—

D

[RGB DRIVE, CRT DRIVE]

1 | 2 | 3 |

1

0

7

Q

B

E

2

0

7

C

0

7

R

6

7

0

4

R

7

1

6

K

R

A

P

S

P

A

G

D

N

D

U

N

O

U

R

O

R

G

1

R

I

C

7

4

5

1

C

N

7

0

6

R

7

1

7

1

8

R

7

C

N

7

0

1

2

7

0

1

R

7

0

2

1

3

2

R

7

1

R

7

1

5

D

7

0

4

R

7

1

0

4

R

7

0

6

C

7

0

R

7

0

5

1

R

7

1

3

D

7

0

3

R

7

1

D

7

0

1

R

7

1

2

D

7

0

2

1

9

B

E

R

7

0

9

C

N

7

0

5

G

D

N

O

T

G

U

O

T

B

U

O

T

R

2

P

0

T

7

P

0

T

O

T

R

U

7

1

B

U

O

T

R

7

0

9

1

0

R

7

R

7

0

8

-

7

6

1

7

1

7

1

"

R

G

B

&

—

3

0

7

N

C

D

N

U

O

R

G

CB BOARD WAVEFORMS

1

132.8V p-p (H)

2

1

-

9

-

4

7

8

1

8

9

4

1

T

I

L

T

A

M

P

.

"

R

V

7

0

1

32

135.9V p-p (H) 140.6V p-p (H)

— 29 —

K BOARD SCHEMATIC DIAGRAM

1 | 2 | 3 | 4 | 5 | 6 |

CN402

3P

A

—

B

—

TO MB BOARD

CN1000

C446

100 16V

D

A

L

N

D

C

G

S

3

2

1

R456

100

R455

100

9V

R435

220

R436

4.7k

5.2V

R437

Q433

220

2SB709A

BUFFER

4.5V

JR474

0 SHORT

C

—

D

—

E

—

(AUDIO PROCESSOR)

JW407

0.3V

R432

10k

F

R434

4.7k

Q432

2SB709A

BUFFER

4.5V

9V

JW(5mm)

JW408

10.0MM

0V

R433

Q430 Q431

2SD601AX

MUTE

C441

100

C416

4.7

C423

4.7

JR408

C458

0

R431

10k

2SD601A

TO A BOARD

CN460

KV-25FS12 / 25FS12C

C419C418 C410C409

1 16V :CHIP0.1

25V

:CHIP

C417

4.7

D

G

S

A

N

D

C

D

A

L

5.1V

R438

220

C475

0.1

IC404

V

A

D

C

U

A

C

X

C

0

1

21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

C415

4.7

C414

4.7

C422

4.7 C413

4.7

C412

:CHIP

A

L

O

A

G

I

U

G

C

N

T

C

E

A

NJW1130AG-TE2 AUDIO PROCESSOR

L I N

V

O

E

R

U

P

E

T

F

B

S

L

O I D U A

0.1 25V

AUDIO-L

AUDIO-R

R430

4.7k

0V

MUTE

:CHIP

0.3V

C440

0.1 25V

CN450

F

20P

3

2

1

R

L

R

-

X

N

I

O

F

M

/ R A V

9V

R439

4.7k

:CHIP

L410

0

9

6

5

8

7

4

L

X

-

I

T

F

U

/

O

R A V

1

L

R

D

-

V

-

N

V

9

T

G

U

Y

O

C408

0.22 25V

AUDIO-R

M O N A

M O N B

:CHIP

1 1

L

3 V

0.033 :CHIP0.0015 B:CHIP

JW(5mm)

C490

0

R468

0

AUDIO-R

123456789

I

N

1

2

3

4

5

A

I

N

5

4

3

2

1

R442

220

R405

100

R410

100

C448

C411

0.0033 B:CHIP

JW405

5MM

1011121314151617181920

C407

0.22 25V

I

T

B

T

B

N

O

B

O

B

6

N

E

N

E

A

E

A

E

A

T

O

N

B

E

B

I

E

N

B

6

B

C406

0.0015 B:CHIP

C405

0.033 :CHIP

C404

0.0033 B:CHIP

R469

0

R470

R403

100

0

1/10W

100

R404

L

O I D U A

R409

100

R

O I D U A

C447

JW(5mm)

AUDIO-L

AUDIO-R

9

8

7

6

5

4

3

2

1

L

R

-

E

-

1

3

T

1

V

U

V

M

0

1

2

BA5-902-K

.

L

R

C

-

.

2

V

2

V

N

V

T

V

T

A

—

B

—

C

—

K

[AUDIO PROCESSOR]

1 | 2 |

C

4

5

7

C

4

2

4

C

4

5

C

4

5

6

2

4

I

C

4

0

3

1

.

S

R

S

.

C

4

3

0

C

4

3

1

C

4

2

8

C

4

3

2

R

4

6

4

J

R

4

2

0

R

4

1

0

C

4

9

0

R

4

0

3

C

2

0

1

R

4

0

9

C

4

5

0

R

4

0

2

4

R

4

7

9

J

R

4

2

9

3

-

6

1

7

C

4

3

1

J

2

1

9

C

4

0

4

0

1

0

8

2

-

7

6

3

C

N

4

0

8

4

1

6

2

6

J

R

4

0

7

R

4

2

6

C

4

0

6

2

4

1

3

J

R

4

2

7

C

4

1

5

C

4

1

2

C

4

1

3

C

4

0

5

4

0

4

C

I

S

E

R

D

C

O

P

U

O

I

A

2

1

5

9

R

4

R

4

5

6

C

4

6

K BOARD IC VOLTAGE LIST

IC404

pin volt 14 1.0 28 4.5

1 4.5 15 4.5 29 4.5

13 4.5 27 3.9

2 4.5 16 0.9 30 N/C 3 4.5 17 0.9 31 4.5

O

R

1

4 N/C 18 4.8 32 4.5 5 4.5 19 4.9 33 4.5 6 N/C 20 GND 34 4.5

R

4

3

C

4

0

8

C

4

1

0

1

C

4

1

C

4

5

1

R

4

3

C

N

4

5

0

C

4

1

9

C

4

0

9

C

4

C

4

1

8

C

4

2

R

4

3

8

R

4

3

9

C

4

0

Q

4

R

4

3

2

Q

4

3

1

R

4

5

0

2

Q

4

3

2

3

R

4

3

4

R

4

3

7

Q

4

3

R

4

3

6

R

3

0

1

4

3

7 4.7 21 8.9 35 N/C 8 4.5 22 N/C 36 N/C

9 4.5 23 N/C 37 N/C 10 4.5 24 1.3 38 4.5 11 N/C 25 1.3 39 4.5 12 4.5 26 4.4 40 4.5

All voltages are in V

— 30 —

Sony KV-25FS12, KV-25FS12C Service manual

TABLE OF CONTENTS

SPECIFICATIONS

5-1. CIRCUIT BOARDS LOCATION

A BOARD SCHEMATIC DIAGRAM

CB BOARD SCHEMATIC DIAGRAM

K BOARD SCHEMATIC DIAGRAM