Sony TRINITRON KV-25FS12 User manual

TRINITRON® COLOR TELEVISION
SERVICE MANUAL BA-5 CHASSIS
MODEL NAME REMOTE COMMANDER DESTINATION CHASSIS NO.
KV-25FS12
9-965-902-01
KV-25FS12 RM-Y173 E SCC-S38UA
KV-25FS12C RM-Y173 E SCC-S38VA
RM-Y173

— 2 —
KV-25FS12 / 25FS12C
TABLE OF CONTENTS
Specifi cations.......................................................................................................................................3
Warnings and Cautions........................................................................................................................4
Safety Check-out .................................................................................................................................5
Self-Diagnostic Function......................................................................................................................6
1 Disassembly
- . Rear Cover Removal.....................................................................................................................8
-2. Chassis Assembly Removal..........................................................................................................8
-3. Service Position ............................................................................................................................8
-4. Picture Tube Removal ...................................................................................................................9
Anode Cap Removal Procedure...................................................................................................9
2 Set-up Adjustments
2- . Beam Landing............................................................................................................................... 0
2-2. Convergence.................................................................................................................................
2-3. Focus ............................................................................................................................................ 2
2-4. Screen (G2) .................................................................................................................................. 2
2-5. Method of Setting the Service Adjustment Mode.......................................................................... 3
2-6. White Balance Adjustments .......................................................................................................... 3
3 Safety Related Adjustments
3- .
X R564 Confi rmation Method (HV Hold Down Confi rmation) and Readjustments..................... 4
3-2. B+ Voltage Confi rmation and Adjustment ..................................................................................... 4
4 Circuit Adjustments
4- . Setting the Service Adjustment Mode........................................................................................... 6
4-2. Memory Write Confi rmation Method ............................................................................................. 6
4-3. Remote Adjustment Buttons and Indicators ................................................................................. 6
Adjustment Items.......................................................................................................................... 7
4-4. MB Board Adjustments ................................................................................................................. 9
5 Diagrams
5- . Circuit Boards Location.................................................................................................................2
5-2. Printed Wiring Boards and Schematic Diagrams..........................................................................2
5-3. Block Diagram...............................................................................................................................22
A Board ........................................................................................................................................24
CB Board......................................................................................................................................28
K Board ........................................................................................................................................30
MB Board .....................................................................................................................................3
VB Board ......................................................................................................................................35
5-4. Semiconductors ............................................................................................................................36
6 Exploded Views
6- . Chassis .........................................................................................................................................37
7 Electrical Parts List ......................................................................................................................................38
SECTION TITLE PAGE

— 3 —
KV-25FS12 / 25FS12C
Television system
NTSC
Channel coverage
VHF: 2- 3/ VHF: 4-69/ CATV: - 25
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-Y 73
Size AA (R6) batteries (2)
Dipole Antenna
Optional Assessories
Connecting cables: VMC-8 0S/820S, VMC-720M,
YC- 5V/30V, RK74A
U/V mixer EAC-66
SPECIFICATIONS
Design and specifi cations are sub ect to change without notice.
) Vp-p 75 ohms unbalanced, sync negative
2) Y: Vp-p 75 ohms unbalanced, sync negative
C: 0.286 Vp-p (Burst signal), 75 ohms
3) 500 m Vrms ( 00% 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
KV-25FS12 KV-25FS12C
Power requirements 120V, 60Hz 220V, 50/60Hz
Number of Inputs/Outputs
Video 1) 2
S Video 2) 1
udio 3) 2
udio Out 4) 1
Headphone Out
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
in 24 13/64 x 22 13/64 x 19 49/64
Mass
kg 36 kg
lbs 79 lbs 6 oz.
1

— 4 —
KV-25FS12 / 25FS12C
W RNINGS ND C UTIONS
C UTION
Short circ it the anode of the pict re t be and the anode cap to the metal chassis, CRT shield, or carbon painted on the CRT,
after removing the anode.
W RNING!!
An isolation transformer sho ld be sed d ring any service to avoid possible shock hazard, beca se of live chassis. The chassis of
this receiver is directly connected to the AC power line.
! S FETY-REL TED COMPONENT W RNING!!
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 n mbers appear as shown in this man al or in s pplements
p blished by Sony. Circ it adj stments that are critical for safe operation are identifi ed in this man al. Follow these proced res
whenever critical components are replaced or improper operation is s spected.
TTENTION!!
Apres avoir deconnecte le cap de l’anode, co rt-circ iter l’anode d t be cathodiq e et cel i de l’anode d cap a chassis metalliq e
de l’appareil, o la co che de carbone peinte s r le t be cathodiq e o a blindage d t be cathodiq e.
Afi n d’eviter to t risq e d’electroc tion provenant d’ n chássis so s tension, n transformate r d’isolement doit etre tilisé lors de to t
dépannage. Le chássis de ce récepte r est directement raccordé à l’alimentation d secte r.
! TTENTION UX COMPOS NTS REL TIFS L SECURITE!!
Les composants identifi es par ne trame et par ne marq e ! s r les schemas de principe, les v es explosees et les listes de
pieces sont d’ ne importance critiq e po r la sec rite d fonctionnement. Ne les remplacer q e par des composants sony dont
le n mero de piece est indiq e dans le present man el o dans des s pplements p blies par sony. Les reglages de circ it dont
l’importance est critiq e po r la sec rite d fonctionnement sont identifi es dans le present man el. S ivre ces proced res lors de
chaq e remplacement de composants critiq es, o lorsq ’ n ma vais fonctionnement s specte.

— 5 —
KV-25FS12 / 25FS12C
S FETY CHECK-OUT
After correcting the original service problem, perform the following
safety checks before releasing the set to the c stomer:
1. Check the area of yo r repair for nsoldered or poorly soldered
connections. Check the entire board s rface for solder splashes and
bridges.
2. Check the interboard wiring to ens re that no wires are “pinched” or
to ching high-wattage resistors.
3. Check that all control knobs, shields, covers, gro nd straps, and
mo nting hardware have been replaced. Be absol tely certain that
yo have replaced all the ins lators.
4. Look for na thorized replacement parts, partic larly transistors,
that were installed d ring a previo s repair. Point them o t to the
c stomer and recommend their replacement.
5. Look for parts which, tho gh f nctioning, show obvio s signs of
deterioration. Point them o t to the c stomer and recommend their
replacement.
6. Check the line cords for cracks and abrasion. Recommend the
replacement of any s ch line cord to the c stomer.
7. Check the B+ and HV to see if they are specifi ed val es. Make s re
yo r instr ments are acc rate; be s spicio s of yo r 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 gro nd and from
all exposed metal parts to any exposed metal part having a ret rn to
chassis, m st not exceed 0.5 mA (500 microamperes). Leakage c rrent
can be meas red by any one of three methods.
1. A commercial leakage tester, s ch as the Simpson 229 or
RCA WT-540A. Follow the man fact rers’ instr ctions to se these
instr ctions.
2. A battery-operated AC milliampmeter. The Data Precision 245 digital
m ltimeter is s itable for this job.
3. Meas ring 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 m st have an acc rate low voltage scale. The
Simpson’s 250 and Sanwa SH-63TRD are examples of passive VOMs
that are s itable. Nearly all battery-operated digital m ltimeters that
have a 2 VAC range are s itable (see Fig re A).
How to Find a Good Earth Ground
A cold-water pipe is a g aranteed earth gro nd; the cover-plate retaining
screw on most AC o tlet boxes is also at earth gro nd. If the retaining
screw is to be sed as yo r earth gro nd, verify that it is at gro nd
by meas ring the resistance between it and a cold-water pipe with an
ohmmeter. The reading sho ld be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt tro ble-
light (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 sho ld light at normal brilliance if the screw is at gro nd
To Exposed Metal
Parts on Set
0.15 F 1.5 K ΩAC
Voltmeter
(0.75 V)
Earth Gro nd
Tro ble Light
AC O tlet Box Ohmmeter
Cold-water Pipe
Fig re A. Using an AC voltmeter to check AC leakage. Fig re B. Checking for earth gro nd.

— 6 —
KV-25FS12 / 25FS12C
Detected Symptoms
SELF-DI GNOSTIC FUNCTION
*If a +B overc rrent is detected, stoppage of the vertical defl ection is detected sim ltaneo sly. The symptom that is diagnosed fi rst by the
mircrocontroller is displayed on the screen.
**Refer to Screen (G2) Adj stments in Section 2-4 of this man al.
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.
Diagnostic Item Flash Count*
+B Overc rrent 2 times
V-STOP 4 times
IK (AKB) 5 times
*One fl ash co nt is not sed for self-diagnostic.
Stopping the Standby/Timer LED Flash
T rn off the power switch on the TV main nit or npl g the power cord from the o tlet to stop the STANDBY/TIMER LAMP from fl ashing.
Standby/Timer LED
The nits in this man al contain a self-diagnostic f nction. If an error occ rs, the STANDBY/TIMER LED will a tomatically begin to fl ash. The n mber
of times the LED fl ashes translates to a probable so rce of the problem. A defi nition of the STANDBY/TIMER LED fl ash indicators is listed in the
instr ction man al for the ser’s knowledge and reference. If an error symptom cannot be reprod ced, the Remote Commander can be sed to review
the fail re occ rrence data stored in memory to reveal past problems and how often these problems occ r.
Diagnostic Test Indicators
When an error occ rs, the STANDBY/TIMER LED will fl ash a set n mber of times to indicate the possible ca se of the problem. If there is more than
one error, the LED will identify the fi rst of the problem areas.
Res lts for all of the following diagnostic items are displayed on screen. If the screen displays a “0”, and error has occ rred.
Power does not t rn on
+B overc rrent (OCP)*
I-Prot
IK (AKB)
Does not light
2 times
4 times
5 times
2:0 or 2:1
4:0 or 4:1
5:0 or 5:1
• Power cord is not pl gged in.
• F se is b rned o t (F601). (A Board)
• H.OUT (Q502) is shorted.(A Board)
• IC702 is shorted. (CB Board)
• +13V is not s pplied. (A Board)
• IC502 is fa lty. (A Board)
• Viedo OUT (IC502) is fa lty. (A Board)
• IC1301 is fa lty. (MB Board)
• Screen (G2) is improperly adj sted.**
No. of times
ST NDBY/ TIMER
lamp fl ashes
Diagnostic Item
Description
Self-Diagnositc
Display/
Diagnostic Result
Probable Cause Location
• Power does not come on.
• No power is s pplied to the TV.
• AC Power s pply is fa lty.
• Power does not come on.
• Load on power line is shorted.
• Has entered standby state after horizontal raster.
• Vertical defl ection p lse is stopped.
• Power line is shorted or power s pply is stopped.
• No raster is generated.
• CRT Cathode c rrent detection reference p lse
o tp t is small.

— 7 —
KV-25FS12 / 25FS12C
Self-Diagnostic Screen Display
For errors with symptoms s ch as “power sometimes sh ts off” or “screen sometimes goes o t” that cannot be confi rmed, it is possible to bring p
past occ rrences of fail re on the screen for confi rmation.
To Bring Up Screen Test
In standby mode, press b ttons on the Remote Commander seq entially, in rapid s ccession, as shown below:
Display Channel 5
So nd Vol me - Power ON
Self-Diagnostic Screen Display
N meral “0” means that no fa lt was detected.
N meral “1” means a fa lt was detected one time only.
SELF DI GNOSTIC
2: 000
3: N/
4: 000
5: 001
101: N/
Handling of Self-Diagnostic Screen Display
Since the diagnostic res lts displayed on the screen are not a tomatically cleared, always check the self-diagnostic screen d ring repairs. When yo
have completed the repairs, clear the res lt display to “0”.
Unless the res lt display is cleared to “0”, the self-diagnostic f nction will not be able to detect s bseq ent fa lts after completion of the repairs.
Clearing the Result Display
To clear the res lt display to “0”, press b ttons on the Remote Commander seq entially when the diagnostic screen is displayed, as shown below:
Channel 8 ENTER
Quitting the Self-Diagnostic Screen
To q it the entire self-diagnostic screen, t rn off the power switch on the Remote Commander or the main nit.
Self-Diagnostic Circuit
+B overcurrent (OCP)
Occ rs when an overc rrent 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 nit will a tomatically t rn off.
I-Prot
Occ rs when an absence of the vertical defl ection p lse is detected by pin 17 of IC1001 (MB Board). Power s pply will sh t down when waveform
interval exceeds 2 seconds.
IK ( KB)
If the RGB levels* do not balance within 2 seconds after the power is t rned on, this error will be detected by IC1301 (MB Board). TV will stay
on, b t there will be no pict re.
*(Refers to the RGB levels of the AKB detection Ref p lse that detects 1K).
Note that this differs from entering the Service Mode (So nd Vol me + ).
MB BOARD
IC1301
Y/CHROMA JUNGLE
A BOARD
IC502
V. OUT
MB BOARD
IC1001
SYSTEM
MB BOARD
IC1003
MEMORY
IK IN
FROM
CB BOARD
IC702 PIN 5
HP/PROTECT
SDA
A BOARD
FROM
IC501
PIN 3
18
IO-SDAT
O-LED
REF I-Prot
IO-BDAT
BDA
DISPLAY
21
35
317
37 18
36 5

— 10 —
KV-25FS12 / 25FS12C
The following adj stments sho ld be made when a complete
realignment is req ired or a new pict re t be is installed.
These adj stments sho ld be performed with rated power s pply
voltage nless otherwise noted.
Set the controls as follows nless otherwise noted:
VIDEO MODE: Standard
PICTURE CONTROL: Normal
BRIGHTNESS CONTROL: Normal
SECTION 2: SET-UP DJUSTMENTS
Perform the adjustments in order as follows:
1. Beam Landing
2. Convergence
3. Foc s
4. Screen (G2)
5. White Balance
Note Test Equipment Required:
1. Color Bar Pattern Generator
2. Dega sser
3. DC Power S pply
4. Digital M ltimeter
2-1. BE M L NDING
Before beginning adj stment proced re:
1. Dega ss the entire screen.
2. Feed in the white pattern signal.
DJUSTMENT PROCEDURE
1. Inp t a raster signal with the pattern generator.
2. Loosen the defl ection yoke mo nting screw, and set the p rity control
to the center as shown below:
Purity Control
3. T rn the raster signal of the pattern generator to green.
4. Move the defl ection yoke backward, and adj st with the p rity control
so that green is in the center and red and bl e are even on both
sides.
Blue Red
Green
5. Move the defl ection yoke forward, and adj st so that the entire screen
becomes green.
6. Switch over the raster signal to red and bl e and confi rm the
condition.
7. When the position of the defl ection yoke is determined, tighten it with
the defl ection yoke mo nting screw.
8. If landing at the corner is not right, adj st by sing the disk magnets.
a
c
b
d
ba
cd
P rity control
corrects this area
Disk magnets
or rotatable disk
magnets correct
these areas (a-d)
Deflection yoke positioning
corrects these areas

— 11 —
KV-25FS12 / 25FS12C
2-2. CONVERGENGE
Before starting convergence adj stments:
1 Perform FOCUS, VLIN and VSIZE adj stments.
2. Set BRIGHTNESS control to minim m.
3. Feed in dot pattern.
VERTIC L ST TIC CONVERGENCE
1. Adj st V. STAT magnet to converge red, green and bl e dots in the
center of the screen (Vertical movement adj st V.STAT RV701 to
converge).
B
G
R
Center dot
R G B
V.STAT magnet
RV701
V.STAT
2. Tilt the V. STAT magnet and adj st 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 bl e dots move as shown below:
B
R
G
B
R
G
RG B
G
R
B
G
B
R
BG R
1
2
3
a
b
ab
b
b
a
a
b
ba
b
ab
HORIZONT L ST TIC CONVERGENCE
If the bl e dot does not converge with the red and green dots, peform
the following:
1. Move BMC magnet (a) to correct ins ffi cient H.Static convergence.
2. Rotate BMC magnet (b) to correct ins ffi cient V.Static convergence.
3. After adj sting the BMC magnet, repeat Beam Landing Adj stment.
BMC MAGNET
PURITY
V. S TAT
b
BMC magnet
a

— 12 —
KV-25FS12 / 25FS12C
DYN MIC CONVERGENCE DJUSTMENT
Before performing this adj stment, perform Horizontal and Vertical Static
Convergence Adj stment.
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:
RGB BGR
RGB
R
R
R
G
B
G
B
G
B
RGB
BGR
R
G
BR
G
B
BGR RGB
4. Tighten the defl ection yoke screw.
5. Install the defl ection yoke spacers.
TLH PL TE DJUSTMENT
1. Inp t crosshatch pattern.
2. Adj st PICTURE QUALITY to standard, PICTURE and BRIGHTNESS
to 50%, and OTHER to standard.
3 Adj st the Horizontal Convergence of red and bl e dots by tilting the
TLH plate on the defl ection yoke.
(TLV)
YCH
XCV
TLV
CB Board
VB
Board
RV701
V.S TAT
TLH Plate
B R R B
(R)(B) (B)(R)
TLH+
TLH-
4. Adj st XCV core to balance X axis.
5. Adj st YCH VR to balance Y axis.
6. Adj st vertical red and bl e convergence with V.TILT (TLV VR.)
Note: Perform adj stment 3-6 while tracking items 1 and 2.
SCREEN-CORNER CONVERGENCE
1. Affi x a permalloy assembly corresponding to the misconverged areas:
ba
cd
a
b
d
a-d: screen-corner
misconvergence
c
2-3. FOCUS
1. Adj st FOCUS control for best pict res.
2-4. SCREEN (G2)
1. Inp t a dot pattern.
2. Set the PICTURE and BRIGHTNESS controls at minim m and
COLOR control at normal.
3. Adj st SBRT, GCUT, BCUT in service mode with an oscilloscope as
shown below so that voltages on the red, green, and bl e cathodes
are 170 ± 2VDC.
pedestal
GND
170 ±2.0 VDC
Foc s (FV)
Screen (G2)

— 13 —
KV-25FS12 / 25FS12C
2-5. METHOD OF SETTING THE SERVICE
DJUSTMENT MODE
SERVICE MODE PROCEDURE
1. Standby mode (power off).
2. Press Display Channel 5 So nd Vol me + Power
on the Remote Commander (press each b tton within a second).
SERVICE DJUSTMENT MODE ON
1. The CRT displays the time being adj sted.
Mode Category
Display
Item
Display
Item
Signal
Type ntsc
service defl
vchp 00000000 00000000
hsiz 16
2. Press 1 or 4 on the Remote Commander to select the time.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to save into the memory.
SERVICE DJUSTMENT MODE MEMORY
T rn the set off then on to exit Service Adj stment Mode.
service defl hsiz 16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
write
ENTER
Green
Red
MUTING
2-6. WHITE B L NCE DJUSTMENTS
1. Inp t an entire white signal with b rst.
2. Set to Service Adj stment Mode.
3. Set the PICTURE and BRIGHTNESS to minim m.
4. Adj st with SBRT if necessary.
5. Select GCUT and BCUT with 1 and 4 .
6. Adj st with 3 and 6 for the best white balance.
7. Set the PICTURE and BRIGHTNESS to maxim m.
8. Select GDRV and BDRV with 1 and 4.
9. Adj st with 3 and 6 for the best white balance.
10. To write into memory, press MUTING then ENTER .

— 14 —
KV-25FS12 / 25FS12C
HOLD-DOWN RE DJUSTMENT
If the setting indicated in Step 2 of Hold-Down Operation Confi rmation
cannot be met, readj stment sho ld be performed by altering the
resistance val e of R564 component marked with
X .
+
IABL
ABL
T505
FBT
range
-
ammeter
3.0 mA DC
A
3-2. B+ VOLT GE CONFIRM TION ND
DJUSTMENT
Note: The following adj stments sho ld always be performed when
replacing the following components, which are marked with
Y on the
schematic diagram on the A Board:
BO RD: IC601, PH601
1. Using a Variac, apply AC inp t voltage: 130 ± 2 VAC
2. Inp t a dot signal.
3. Set the PICTURE and the BRIGHTNESS controls to minim m.
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.
SECTION 3: S FETY REL TED DJUSTMENTS
3-1. X R564 CONFIRM TION METHOD
(HOLD-DOWN CONFIRM TION) ND
RE DJUSTMENTS
The following adj stments sho ld always be performed when replacing
the following components which are marked with
Y on the schematic
diagram:
Part Replaced ( ) Adj stment ( )
DY, T505, CRT, IC501 C507,
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
IC1301........................MB Board
HV HOLD-DOWN
R564
PREP R TION BEFORE CONFIRM TION
1. Using a Variac, apply AC inp t voltage: 120-220 ±2 VAC.
2. T rn the POWER switch ON.
3. Inp t a white signal and set the PICTURE and BRIGHTNESS controls
to maxim m.
4. Confi rm that the voltage between C546 (+) or TP503 and gro nd is
more than 97 VDC.
HOLD-DOWN OPER TION CONFIRM TION
1. Connect the c rrent meter between Pin 11 of the FBT (T505) and
the PWB land where Pin 11 wo ld normally attach (See Fig re 1 on
the next page).
2. Inp t a dot signal and set PICTURE and BRIGHTNESS to minim m:
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 s pply via Diode
1SS119 to C546 (+) and gro nd (See Fig re 1 on next page).
5. Increase the DC power voltage grad ally ntil the pict re blanks o t.
6. T rn DC power so rce off immediately.
7. Read the digital voltmeter indication (standard < 138 ± 0.3 VDC).
8. Inp t a white signal and set PICTURE and BRIGHTNESS to
maxim m: IABL = 1650 ± 100µA.
9. Repeat steps 4 to 7.

— 15 —
KV-25FS12 / 25FS12C
R438
R438R438
R438
R522
R522R522
R522
R541
R541R541
R541
R450
R450R450
R450
R445
R445R445
R445
C611
C611C611
C611
C448
C448C448
C448
R449
R449R449
R449
R454
R454R454
R454
C213
C213C213
C213
R527
R527R527
R527
R525
R525R525
R525
R514
R514R514
R514
R567
R567R567
R567
R225
R225R225
R225
R529
R529R529
R529
C530
C530C530
C530
C546
C546C546
C546
R563
R563R563
R563
R218
R218R218
R218
R227
R227R227
R227
C542
C542C542
C542
C541
C541C541
C541
C518
C518C518
C518
R231
R231R231
R231R232
R232R232
R232
R557
R557R557
R557
C552
C552C552
C552
R554
R554R554
R554
R555
R555R555
R555
R543
R543R543
R543
C532
C532C532
C532
R537
R537R537
R537
C523
C523C523
C523
R540
R540R540
R540
C543
C543C543
C543
C519
C519C519
C519
R535
R535R535
R535
CN504
CN504CN504
CN504
L507
L507L507
L507
R546
R546R546
R546
R534
R534R534
R534
R545
R545R545
R545
C551
C551C551
C551
L510
L510L510
L510 R533
R533R533
R533
R515
R515R515
R515
R516
R516R516
R516 C503
C503C503
C503
C536
C536C536
C536
C504
C504C504
C504
C513
C513C513
C513
R507
R507R507
R507
T503
T503T503
T503
T502
T502T502
T502
R659
R659
R659
R659
C629
C629C629
C629
L602
L602L602
L602
R447
R447R447
R447
D507
D507D507
D507
C659
C659
C659
C659
T504
T504T504
T504
FB610
FB610
FB610
FB610
C524
C524C524
C524
C550
C550C550
C550
R539
R539R539
R539
R518
R518R518
R518
FB502
FB502FB502
FB502
R505
R505R505
R505
L505
L505L505
L505
R506
R506R506
R506
L501
L501L501
L501
C517
C517C517
C517
L509
L509L509
L509
C510
C510C510
C510
R615
R615R615
R615
R601
R601R601
R601 IC502
IC502IC502
IC502
CN502
CN502CN502
CN502
Q411
Q411Q411
Q411
CN511
CN511CN511
CN511
CN506
CN506CN506
CN506
CN515
CN515CN515
CN515
Q501
Q501Q501
Q501
JR503
JR503JR503
JR503
JR502
JR502JR502
JR502
R573
R573R573
R573
R531
R531R531
R531
Q505
Q505Q505
Q505
C654
C654C654
C654
IC501
IC501IC501
IC501
L502
L502L502
L502
R532
R532R532
R532
D233
D233D233
D233
D232
D232D232
D232
D520
D520D520
D520
R561
R561R561
R561
D234
D234D234
D234
D235
D235D235
D235
R565
R565R565
R565
FB503
FB503FB503
FB503
R558
R558R558
R558 R559
R559R559
R559
TH501
TH501TH501
TH501
R511
R511R511
R511
R503
R503R503
R503
C554
C554C554
C554
C525
C525C525
C525
C511
C511C511
C511
D616
D616D616
D616
D521
D521D521
D521
R502
R502R502
R502
R547
R547R547
R547
R504
R504R504
R504
C505
C505C505
C505
D506
D506D506
D506
CN501
CN501
CN501
CN501
R568
R568R568
R568
T505
T505T505
T505
D511
D511D511
D511
D514
D514D514
D514 D517
D517D517
D517
D518
D518D518
D518
D516
D516D516
D516
R226
R226R226
R226
D236
D236D236
D236
D510
D510D510
D510
R407
R407R407
R407
C211
C211C211
C211
D620
D620D620
D620
R403
R403R403
R403
Q201
Q201Q201
Q201
Q503
Q503Q503
Q503
Q206
Q206Q206
Q206
Q205
Q205Q205
Q205
Q502
Q502
Q502
Q502
R553
R553R553
R553
C555
C555C555
C555
C515
C515C515
C515
C509
C509C509
C509
C624
C624C624
C624
R804
R804R804
R804
R803
R803R803
R803
R801
R801R801
R801
1
1
1
1
2
2
2
26
6
6
6
7
7
7
7
B
B
B
BE
E
E
E
1
11
17
77
7
B
B
B
BE
E
E
E
1
11
19
99
9
10
1010
1018
1818
18
1
1
1
16
6
6
6
1
11
15 55
5
1
11
14 44
4
E
E
E
E
135V
135V135V
135V
+
+
+
+
1
11
1
4
44
4
5
55
5
8
88
8
C
C
C
C
B
B
B
B
2
2
2
26
6
6
6
4
4
4
4
H DY +
H DY +H DY +
H DY +
H DY -
H DY -H DY -
H DY -
V DY +
V DY +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 -
1
11
1
2
22
2
3
33
3
4
44
4
5
55
5
6
66
6
H-OUT
H-OUT
H-OUT
H-OUT
H.PROT
H.PROTH.PROT
H.PROT
HEATER
HEATERHEATER
HEATER
-13V
-13V-13V
-13V
200V
200V200V
200V
H.PULSE
H.PULSEH.PULSE
H.PULSE
H.DRIVE
H.DRIVEH.DRIVE
H.DRIVE
+B
+B+B
+B
JUMPER-ID
JUMPER-IDJUMPER-ID
JUMPER-ID
Figure 1
TP600
X R564 C546
+
-
DIGIT L
MULTIMETER
+
-
POWER
SUPPLY
1SS119
T505 FBT
+
-
MMETER
3m dc range

— 16 —
KV-25FS12 / 25FS12C
4-1. SETTING THE SERVICE DJUSTMENT
MODE
1. Standby mode (Power off).
2. Press the following b ttons on the remote commander within a
second of each other:
Display Channel 5 So nd Vol mne + Power
SERVICE DJUSTMENT MODE ON
1. The CRT displays the item being adj sted.
service defl hsiz 16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
2. Press 1 or 4 on the Remote Commander to select the item.
3. Press 3 or 6 on the Remote Commander to change the data.
4. Press MUTING then ENTER to write into memory.
SERVICE DJUSTMENT MODE MEMORY
service defl hsiz 16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
write
ENTER
Green
Red
MUTING
1. Press 8 then ENTER on the Remote Commander to initialize.
service defl hsiz 16
ntsc
vchp 00000000 00000000
Category
Display
Item
Mode
Item
Data
Signal
Type
write
ENTER
Green
Red
MUTING
Carry o t Step 1 when adj sting
IDs 0-6 and when replacing and
adj sting IC1003
2. T rn set off then on to exit service adj stment mode.
4-2. MEMORY WRITE CONFIRM TION
METHOD
1. After adj stment, p ll o t the pl g from the AC o tlet, then replace
the pl g in the AC o tlet again.
2. T rn the power switch ON and set to Service Mode.
3. Call the adj sted items again to confi rm they were adj sted.
4-3. REMOTE DJUSTMENT BUTTONS ND
INDIC TORS
SECTION 4: CIRCUIT DJUSTMENTS
ELECTRIC L DJUSTMENTS BY REMOTE COMM NDER
Use the Remote Commander (RM-Y173) to perform the circ it adj stments in this section.
Test Equipment Required: 1. Pattern generator 2. Freq ency co nter 3. Digital m ltimeter 4. A dio oscillator
RM-Y173
MUTING
DISPLAY
1
2
3
4
5
6
8
0
VOLUME (+)
POWER
ENTER
(Enter into
memory
(Service Mode)
Disp. (Item p)
(Device Item Up)
Disp. (Item down)
(Initialize)
(Service Mode)
Item (Data p)
Item (Data down)
(Device item down)
(Enter into
memory
(Remove from
memory)
(Service Mode)

— 17 —
KV-25FS12 / 25FS12C
DJUSTMENT ITEMS (1 OF 2)
Reg # ITEM FUNCTION R NGE
FIX
D T NTSC VIDEO RF
VER GE
D T
1 HSIZ Horizontal Size Adj stment 0-63 35 38
2 HPOS Horizontal Position Adj stment 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 Mod lation On/Off 0,1 0
10 BLKO Vertical Blanking On/Off 0,1 0 0
11 VMLV Velocity Mod lation Level 0-3 2
12 AGN2 Aging 2 0,1 0 0
13 REFP Reference P lse 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 Adj stment 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 Adj stment 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 Adj stment 0-15 11 12
26 RBLK Right Blanking Adj stment 0-15 8 5
27 VUSN V Saw Waveform Compress 0,1 0 0
28 HDW Horizontal Drive P lse Width 0,1 1 1
29 EWDC "Parabola" EW/ D.C. Adj stment 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 O tp t Drive Control 0-63 31 36
34 GDRV G O tp t Drive Control 0-63 21 26
35 BDRV B O tp t Drive Control 0-63 21 25
36 RCUT R O tp t C toff Control 0-15 10 8
37 GCUT G O tp t C toff Control 0-15 6 6
38 BCUT B O tp t C toff Control 0-15 6 7
39 DCOL Dynamic Color On/Off 0,1 0 1
40 SHUE S b HUE 0-31 15 15
41 SCOL S b Color 0-31 15 15
42 SBRT S b BRIGHTNESS 0-31 16 15
43 RON R O tp t On/Off 0,1 1 1
44 GON G O tp t On/Off 0,1 1 1
45 BON B O tp t 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 S b SHARPNESS 0-15 5 7
Palette mode controls this register
Palette mode controls this register

— 18 —
KV-25FS12 / 25FS12C
DJUSTMENT ITEMS (2 OF 2)
service id’s id5 19
ntsc
M37280MK-00SP VERB.O
F nction
ID
N mber
Mode Data
Signal
Type 00010011
Chip
Version
Reg # ITEM FUNCTION R NGE
FIX
D T NTSC VIDEO RF
VER GE
D T
53 SHPF SHARPNESS Circ it Fo 0,1 1
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
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 O t 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 Co nt Down Mode Switching 0-3 3 0 0
69 AFC AFC Loop Gain Switching 0-3 0 0 0 0
70 FIFR Field Freq ency 0-3 3 3 3
71 SBAL S b Balance 0-15 5 7
72 SBAS S b Bass 0-15 0 9
73 STRE S b Treble 0-15 3 9
74 BBEL BBE Low 0-15 4 12
75 BBEH BBE High 0-15 5 9
76 SRND S rro nd 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 Co nt Lower Limit 0-127 16 16
81 HCHG Horizontal Co nt 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
Palette mode controls this register
Palette mode controls this register
Palette mode controls this register
Notes:
No. 1-100 show the order that each adj stment mode may be selected while in Service Mode.
Data Range shows the range of possible setting for each Adj stment Mode.
Initial Data shows the standard settings for each Adj stment Mode.

— 19 —
KV-25FS12 / 25FS12C
4-4. MB BO RD DJUSTMENTS
H. FREQUENCY (FREE RUN) CHECK
1. Inp t a TV mode (RF) with no signal.
2. Connect a freq ency co nter to base of Q501
(TP-500 H. DRIVE) on the A Board.
3. Check H. Freq ency for 15735 ± 200 Hz.
V. FREQUENCY (FREE RUN) CHECK
1. Select video 1 with no signal inp t.
2. Set the conditions for a standard setting.
3. Connect the freq ency co nter to TP-508 (V OUT) or CN501 pin 6
(V DY+) and gro nd on the A Board .
4. Check that V. Freq ency shows 60 ± 4 Hz.
DRIVE (RDRV)
1. Inp t a color-bar signal and set the level to 75%.
2. Set in Standard mode.
3. Activate the Service Adj stment Mode.
4. Set both GON and BON items. Using 3 and 6 set each to the
following val es. Leave RON set to “1”.
service video rdrv 26
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Signal
Type
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
O t) .
6. Select RDRV with 1 and 4 .
7. Adj st the val e of RDRV with 3 and 6 for
92.0 ± 2 VDC.
92.0 ± 2VDC
8. Reset GON and BON val es to “1”.
R ON: ON (1)
G ON: ON (1)
B ON: ON (1)
9. Press MUTING then ENTER to save into the memory.
DISPL Y POSITION DJUSTMENT (DISP)
1. Inp t a color-bar signal.
2. Set to Service Adj stment Mode.
3. Select DISP with 1 and 4 .
4. Adj st val es of DISP with 3 and 6 to adj st characters to the center.
5. Write to memory by pressing MUTING then ENTER .
6. Check to see if the text is displayed on the screen.
service micro disp 48
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Signal
Type
00000000 00000000
SUB BRIGHT DJUSTMENT (SBRT)
1. Inp t a monoscope signal.
2. Activate the Service Adj stment Mode.
3. Set the PICTURE and BRIGHTNESS to minim m.
4. Select the SBRT item with 1 and 4 .
5. Adj st the val es of SBRT with 3 and 6 to obtain a faintly visible
crosshatch.
6. Press MUTING then ENTER to save into the memory.
SUB HUE, SUB COLOR DJUSTMENT (SHUE,
SCOL)
1. Inp t a color-bar signal.
2. Activate the Service Adj stment Mode.
3. Connect an oscilloscope probe to CB Board, CN705 Pin 4 Bl e O t.
4. Select the SHUE and SCOL item with 1 and 4 .
5. While showing the SHUE item, adj st the waveform with 1 and 4
ntil the second and third bars show the same level (V2 = V3 < 0.1
Vp-p).
6. While showing the SCOL item, adj st the waveform with 3 and 6
ntil the fi rst and fo rth bars show the same level (V1 = V4 < 0.1
Vp-p).
V1 V2 V3 V4
7. Press MUTING then ENTER to save into the memory.
V. SIZE DJUSTMENT (VSIZ)
1. Inp t a crosshatch signal.
2. Activate the Service Adj stment Mode.
3. Select the VSIZ item with 1 and 4 .
4. Adj st val e of VPOS with 1 and 4 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.

— 20 —
KV-25FS12 / 25FS12C
V. CENTER DJUSTMENT (VPOS)
Perform this adj stment after performing H. Freq ency
(Free R n) Check.
1. Inp t a crosshatch signal.
2. Activate the Service Adj stment Mode.
3. Select the VPOS item with 1 and 4 .
4. Adj st val e of VPOS with 3 and 6 for the best vertical center.
5. Press MUTING then ENTER to save into the memory.
H. CENTER DJUSTMENT (HPOS)
Perform this adj stment after performing H. Freq ency
(Free R n) Check.
1. Inp t a crosshatch signal.
2. Activate the Service Adj stment Mode.
3. Select the HPOS item with 1 and 4 .
4. Adj st the val e of HPOS with 3 and 6 for the best horizontal center.
5. Press MUTING then ENTER to save into the memory.
H. SIZE DJUSTMENT (HSIZ)
1. Inp t a monoscope signal.
2. Activate the Service Adj stment Mode.
3. Select HSIZ with 1 and 4 .
4. Adj st with 3 and 6 for the best horizontal size.
5. Press MUTING then ENTER to save into the memory.
V. LINE RITY (VLIN), V. CORRECTION
(SCOR), PIN MP (P MP), ND HORIZONT L
TR PEZOID (HTRP) DJUSTMENTS
1. Inp t a crosshatch signal.
2. Activate the Service Adj stment Mode.
3. Select VLIN, SCOR, PAMP, and HTRP with with 1 and 4.
4. Adj st with 3 and 6 for the best horizontal size.
5. Press MUTING then ENTER to save into the memory.
V LINEARITY (VLIN)
V CORRECTION (SCOR)
PIN AMP (PAMP)
HORIZONTAL TRAPEZOID (HTRP)
V. NGLE (V NG), V. BOW (VBOW), UPPER
PIN (UPIN) ND LOW PIN (LPIN)
DJUSTMENTS
1. Inp t a crosshatch signal.
2. Activate the Service Adj stment Mode.
3. Select VANG, VBOW, UPIN, and LPIN with 1 and 4.
4. Adj st with 3 and 6 for the best pict re.
5. Press MUTING then ENTER to save into the memory.
V ANGLE (VANG)
V BOW (VBOW)
UPPER PIN (UPIN)
LOW PIN (LPIN)
SERVICE DJUSTMENT MODE MEMORY
1. After completing all adj stments, press 0 then ENTER .
Read From Memory
Green
Red
ENTER
0
service defl vbow 7
ntsc
vchp
Category
Display
Item
Mode
Item
Data
Signal
Type
00000000 00000000

— 21 —
KV-25FS12 / 25FS12C
5-2. PRINTED WIRING BO RDS ND
SCHEM TIC DI GR MS
• All capacitors are in µF nless otherwise noted. pF : µµF 50V or less
are not indicated except for electrolytics and tantal ms.
• All electrolytics are in 50V nless 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
• : nonfl ammable resistor.
• : f sible resistor.
• : internal component.
• : panel designation and adj stment for repair.
• : earth gro nd
• : earth-chassis
• All variable and adj stable resistors have characteristic c rve B,
nless otherwise noted.
• The components identifi ed by
X in this basic schematic diagram
have been caref lly factory-selected for each set in order to
satisfy reg lations regarding X-ray radiation. Sho ld replacement be
necessary, replace only with the val e originally sed.
• When replacing components identifi ed by
Y , make the necessary
adj stments as indicated. If the res lts do not meet the specifi ed
val e, change the component identifi ed by
X and repeat the
adj stment ntil the specifi ed val e is achieved (Refer to Safety
Related Adj stment on Page 14).
5-1. CIRCUIT BO RDS LOC TION
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.
Les composants identifi es per un trame et une marque
! sont critiques pour la
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.
• When replacing the parts listed in the table below, it is important to
perform the related adj stments.
Part Replaced ( ) Adj stment ( )
DY, T505, CRT, IC501 C507,
C520, C505, C509, C515, T504,
T503, C551, L510, C546, C537,
C547, D517, D518, D519, R560,
R561, R562, R563, R565, R566,
R567, R525....................A Board
IC1301........................MB Board
HV HOLD-DOWN
R564
• All voltages are in V.
• Voltages are DC with respect to gro nd nless otherwise noted.
• Readings are taken with a 10MW digital m ltimeter.
• Readings are taken with a color-bar signal inp t.
• Circled n mbers are waveform references.
• *: cannot be meas red
• : B+line
• : B-line
• : Signal path
REFERENCE INFORM TION
RESISTOR : RN MET L FILM
: RC SOLID
: FPRD NONFL MM BLE C RBON
: FUSE NONFL MM BLE FUSIBLE
: RW NONFL MM BLE WIREWOUND
: RS NONFL MM BLE MET L OXIDE
: RB NONFL MM BLE CEMENT
: DJUSTMENT RESISTOR
COIL : LF-8L MICRO INDUCTOR
C P CITOR : T T NT LUM
: PS STYROL
: PP POLYPROPYLENE
: PT MYL R
: MPS MET LIZED POLYESTER
: MPP MET LIZED POLYPROPYLENE
: LB BIPOL R
: LT HIGH TEMPER TURE
: LR HIGH RIPPLE
SECTION 5: DI GR MS
A Board
CB Board
K Board
MB Board
VB Board

KV-25FS12 / 25FS12C
— 22 —
BA5-902-BD
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
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
2
3
4
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
1
2
3
4
5
1
2
3
4
5
6
7
8
1
2
1
3
2
4
6
1
2
3
1 3 47
8 9
10
12
34
V
L
R
S
1 2
3 4
1
2
3
4
5
7
8
910
11
12
14
15
16
17
13
18
1
2
4
3
1
2
3
4
5
6
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
CN2002
CN2009
CN460
J201
CN406
CN450
D2001
CN601
CN501
T501
T504
J401
CN408
CN407
CN2001
CN506
CN402
T503
R645
D605
D626
C636
CN901
RY602
D622 T604
PH600
RY601
T602
F601
VDR601
T603
T505
S-VIDEO
4P
2P
:MINI
HEADPHONE
3P
10
D4SB60L-F
AC RECT
RELAY
AC POWER
D4SB60L-F
AC RECT SRT
:STAND BY
PHOTOCOUPLER
DGC RELAY
FBT
VIDEO
MAIN1
ST LED I-STEREN
SAP LED I-SAP
MODE O-SAP
F MONO O-MONO
GND
MAIN2
AFT OUT AFT
RF AGC AGC MUTE
9V
30V
5V
L OUT
R OUT
MUTE
MUTE
CY
TV-L
TV-R
FRONT A/V
VIDEO
AUDIO
L
R
V2-L
V2-R
CLOCK
DATA
V1-R
V1-L
YUV-R
YUV-L
AUDIO
L
R
J205
GND
9V
OUT-R
OUT-L
SEL0
SEL1
GND
GND
V1
O-VOL
TV-L
TV-R
V2-L
V2-R
V1-R
V1-L
YUV-R
YUV-L
GND
9V
OUT-R
OUT-L
OUT-B
OUT-A
LINE B
IN5A
LINE A
IN2
IN2A
IN1
IN1A
IN3A
IN3
J202
1
3
4
5
6 8
9
STANDBY CIRCUIT
Q606
PROTECT
Q605
CONVERTER
SWITCH
Q608
STBY DRIVE
Q607
RELAY DRIVE
Q604
RELAY
DGC
DGC
DGC
DGC
D
VIN
S
OCP/FB
+B
FV
G2
ABL
H
5
6
9
8
7
2
4
1
0
0
11
DF
HV
HD
EW
I-HLDWN
VD+
GND
I-PROT
STBY 7.5V
VD-
ABL
CONVERTER
IC601
5V REG
IC604
ERROR AMP
IC602
IC501
V HOLD
CNTRL
V OUT
IC502
AUDIO AMP
IC402
AC IN
SPR
SPL
+
+
TU101
MON-L
MON-R
VAR/FIX-R
VAR/FIX-L
MON-L
MON-R
VAR/FIX-R
VAR/FIX-L
HEATER
6
SPSW
MONITOR
V3
9V
30V
5V
SET5V
SET9V
30V
9V 9V
9V
+B
9V
CN502
V3-L
V3-R
V3-L
V3-R
PIP-L
IR(SENSOR)
POWER-SW
LED-TIMER
GND
V DY+
V DY-
H DY-
H DY-
H DY+
H DY+
MUTE
N.C.
MUTE
N.C.
AUDIO
REAR
OUTPUT
INPUT
TUNER
DET-OUT
TP 506 H OUT
V OUT
+B
DRIVE-
DRIVE+
REF OUT
IN+1
IN-1
OUT2
IN+2
OUT1
SW
Q506,507
OCP
Q505
H OUT
Q502
H DRIVE
Q501
AUDIO
LOW B
VCC
+B
D623
MUTE
Q430 Q431
BUFFER
Q432
Q433
AMP
Q903
Q904
VM OUT
Q905
Q906
Q901
Q902
VM
9V
E
NC
+B
VM
9V
E
NC
+B
STBY 7.5V
VM
E
VM
VM
VM
HP
SPK R+
SPK R-
SPK L+
SPK L-
R BACK
R GO
L BACK
L GO
HP GND
IR DETECT
IC2001
FUNCTION
SWITCH
R BACK
R GO
L BACK
L GO
HP GND
PIN DRIVE
PIN OUT
Q504
Q503
RECT
+B
LOW B
RECT
RECT
AUDIO
IC404
AUDIO
PROCESSOR
(AUDIO PROCESSOR)
(POWER SUPPLY)
(TUNER/IF)
(AUDIO)
(DEFLECTION)
(MTS)
9V REG
IC603
AGC
Q101
TP 508
200V
DGC DRIVER
Q609
5V 9V
1
2
CN602
CN902
VM
DRIVE
(VELOCITY MODULATION)
LOW B LOW B
Q603
Q601,Q602
SW
LOW B
19
18
13
28
5
12
29
39
2
40
1
3
38
12 IO
21
2
4
3
1
17
35
5
1
2
7
3
13
7
8
10
11
1
4
17
14
21
AC
AC
MUTE IN3+
IN4+
IN2+
IN1+
OUT1+
OUT2-
OUT4+
OUT3-
VOL-CTRL
Q411
VOL-CTRL
Q410
Y1
C1
SDAT
SET9V
30V
SET5V
SCL
SCL
GND
SDA
SCL
SDA
STBY +5V
V2(VIDEO2)
STBY +5V
KEY-SW
MENU-SW
5-3. BLOCK DIAGRAM (1 OF 2)
D
C
B
A