Panasonic CT-25G5B Schematic

Download

Page 1

ORDER NO. MTNC000664A1 B5

Service Manual

Color Television

Main Manual

(NA6LV)

Panasonic

Models

CT-25G5B AP356M CT-25G5UB AP356M

This Simplified Service Manual is issued to add listed models to the main Service Manual order No. MTNC000146C1(CT-27G 5B/CB /UB). A full set of Sc hematics , Pict ures and a c omplete Parts List are in clude d in this Simplified Manual. Please file and use this Service Manual together with the Main Service Manual, order No. MTNC000146C1(CT-27G5B/CB/UB).

“WARNING! This Service Manual is desig ned for expe rienced repa ir technici ans only and is not de signed for u se by the general pub lic. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repai red only by exp erienced profe ssional techn icians. Any attemp t to service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death.”

Chassis

The service technician is required to read and follow the “Safety Precautions” and “Important Safety Notice” in this Main Manual.

and distribution is a violation of law.

Page 2

Important Safety Notice

Special components are used in this television set which are important for safety. These parts are identified on the schematic diagra m by the s ymbol and printed in BOLD TYPE on the repl aceme nt part list. It is esse ntial tha t

these critical parts are replaced with the manufacturer’s specified replacement part to prevent X-ray radiation, shock, fire or other hazards. Do not modify the original design without the manufacturer’s permission.

Safety Precautions

General Guidelines

An Isolation Transformer should always be used during the servicing of a r eceiver whose c hassis is not isolated from AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks. It will also pr otect the Receiver from being damaged by accidenta l shorting that may occur during servicing. When servicing, observe the original lead dress, especially in the high voltage circuit. Replace all damaged parts (also parts that show signs of overheating.) Always Replace Protective Devices, such as fishpaper, isolation resistors and capacitors, and shields after servicing the Receiver. Use only manufacturer’s recommended rating for fus es, circuits breakers, etc. High potentials are present when this Receiver is operating. Operation of the Receiver without the rear cover introduc es danger for el ectrical sho ck. Servicin g should not be performed by anyone who is not thoroughly familiar with the necessary precautions when servicing high-voltage equipment.

Extreme care should be p ra ctic ed wh en Handling the Picture Tube. Rough handling may cause it to implode

due to atmospheric pres sure. (14.7 lbs per sq. in.). D o not nick or scratch the glass or subject it to any undu e pressure. When handling, use safety goggles and heavy gloves for protection. Discharge the picture tube by shorting the anode to chassis ground (not to the cabinet or to other mounting hardware). When discharging connect co ld ground (i .e. dag groun d lea d) to the anode with a well insulated wire or use a grounding probe. Avoid prolonged exposure at close range to unshielded areas of the picture tube to prevent exposure to X-ray radiation. The Test Picture Tube used for servicing the chas sis at the bench should incorporate safety glass and magnetic shieldi ng. The safety glass pr ovide shielding for the tube viewing area against X-ray radiation as well as implosion. T he magnetic shield lim its the X-ray radiation around the bell of the pict ure tube in addition to the restricting magnetic effects. When using a picture tube test jig for service, ensure that the jig is capable of handling 37.69kV without causing X-ray radiation. Before returning a ser viced receiver to the owner, the service technic ian must thoroughly test the unit to ensure that is completely safe to operate. Do not use a

line isolation transformer when testing.

Leakage Current Cold Check

Unplug the AC cord and connect a jumper between the two plug prongs. Measure the re si stance betw e e n th e j um p ere d AC pl ug and expose metallic parts such as screwheads, antenna terminals, control shafts, etc. If the exposed

metallic part has a return path to the chassis, the reading should be between 240kΩ and 5.2MΩ. If the exposed metallic part does not have a return path to the chassis, the reading should be infinite.

Leakage Current Hot Check (Fig. 1)

Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during the check. Connect a 1.5kΩ 10 watt resistor in parallel with a

0.15µF capacitor between an exposed metallic part and ground. Use earth ground, for example a water pipe. Using a DVM with a 1000 ohms/volt sensitivity or higher, measure the AC potential across the resistor. Repeat the procedure and measure the voltage present with all other exposed metallic parts. Verify that any potential does not exceed 0.75 volt RMS. A leakage curr ent test er (suc h a S impson M odel 229, Sencore Model P R57 or equival ent) may be used in the above procedure, in which case any current measure must not exceed 1/2 milliamp. If any measurement is out of the specified limits, there is a possibility of a s hoc k haz ard and the Receiver mus t b e repaired and rechecked before it is returned to the customer.

AC VOLTMETER

COLD WATER PIPE (GROUND)

0.15µF

TO INSTRUMENT’S EXPOSED METAL PARTS

1500Ω,10 W

Figure 1. Hot Check Circuit

X-ray Radiation

WARNING: T he potential source of X-ray radiation in the

TV set is in the High V ol tage sect ion and th e picture tu be.

Note: It is important to use an accurate, calibrated

high voltage meter.

Set the brightness, picture, sharpness and color controls to Minimum. Measure the High Voltage. The high voltage should be 29.25kV ± 1.25kV. If the upper limit is out of tolerance, immediate service and correction is required to insure safe operation and to prevent the possibility of premature component failure.

Horizontal Oscillator Disa ble Circuit Test

This test must be performed as a final check before the Receiver is returned to the customer. See Horizontal Oscillator Disable Circuit Procedure Check in this manual.

- 2 -

Page 3

Important Safety Notice . . . . . . . . . . . . . . . . . . .2

Safety Precautions. . . . . . . . . . . . . . . . . .2

Service Notes . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Horizontal Oscillator Disable Circuit. . . . .5

Receivers Feature Table. . . . . . . . . . . . . . . . . . .6

Location of Controls (Receiver)

Receiver Front Control Panel. . . . . . . . . .7

Location of Controls (Remote)

EUR501450 . . . . . . . . . . . . . . . . . . . . . . .8

Component Identification. . . . . . . . . . . . . . . . . .9

Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

SCHEMATICS AND VOLTAGES

A-Board . . . . . . . . . . . . . . . . . . . . . . . . Sheet-1A

C-Board . . . . . . . . . . . . . . . . . . . . . . . . Sheet-1B

WAVEFORMS. . . . . . . . . . . . . . . . . . . . . Sheet-1B

- 3 -

Page 4

Service Notes

Chip Components

TRANSISTOR

CAPACITOR

RESISTOR

MH DIODE

SOLDER CAPS

1ST DIGIT

2ND DIGIT

MULTIPLIER =1600 = 1.6k

GRADE

TYPE

COMMON

ANODES

CATHODE

Note: These components are affixed with glue. Be careful not to break or damage any foil under the

component or at the pins of th e ICs when removing. Usually applying heat to the component for a short time while twisting with tweezers will break the component loose.

Leadless Chip Component (surface mount)

Chip components must be replaced with identical chips due to critical foil tr ack spacing. There are n o holes in the board to mount standard transistors or diodes. Some chips capacitor or resistor board solder pads may have holes t hrough the board, however the hole diameter limits standard resistor replacement to 1/8 watt. Standard capacitor may also be limited for the same reason. It is recommended that identical components be used. Chip resistor have a three digit numerical resistance code - 1st and 2nd significant digits and a multiplier. Example: 162 = 1600 or 1.6kΩ resistor, 0 = 0Ω (jumper). Chip capacitors generally do not have the value indicated on the capacitor. The color of the co mponent indicates the general range of the capaci tance. Chip transistors are id enti fie d b y a two letter code. The first letter indicates the type and the second lette r, the grade of transistor. Chip diodes have a two lette r i den tif icati on c ode as per the code chart an d are a dual diode pack with either common anode or common cathode. Check the parts list for correct diode number.

Component Removal

1. Use solder wick to remove s older from compo nent end caps or terminal.

2. Without pulling up, carefully twist the component with tweezers to break the adhesive.

3. Do not reuse removed leadless or chip components since they are subject to stress fracture during removal.

Chip Component Installation

1. Put a small amount of solder on the board soldering pads.

2. Hold the chip component against the soldering pads with tweezers or with a miniature alligator clip and apply heat to the pad area with a 30 watt iron until solder flows. Do not appl y heat for more than 3 seconds.

How to Replace Flat-IC

- Required Tools -

• Soldering iron • De-solder braids

• Iron wire or small awl • Magnifier

1. Remove the solder from all of the pins of a Fla t-IC by using a de-solder braid.

De-Solder

Flat-IC

2. Put the iron wire under the pins of the Flat-IC and pull it in the direction indicated while heating the pins using a soldering iron. A small awl can be used instead of the iron wire.

Iron Wire

Pull

Soldering Iron

3. Remove the solder from all the pads of the Fla t-IC by using a de-solder braid.

Soldering Iron

De-Solder Braid

Flat IC

4. Position the new Flat-I C in place (app ly the pins of the Flat-IC to the soldering pads where the pins need to be soldered). Properly determine the positions of the soldering pads and pins by correctly aligning the polarity symbol.

Polarity Symbol

Braid

Awl

123.........

5. Solder all pins to the soldering pads using a fine tipped soldering iron.

Solder

Soldering Iron

6. Check with a magnifier for solder bridge between the pins or for dry joint between pi ns and sold erin g pads. To remove a solder bridge, use a de-s older braid as shown in the figure below.

De-Solder Braid

Solder Bridge

Soldering Iron

- 4 -

Page 5

Service Notes (Continued)

IMPORTANT: To protect against possible damage to

the solid state devices due to arcing or static discharge, make cer tain that all g round wir es a nd CTR DAG wire are securely connected.

CAUTION: The power supply circuit is above earth ground and the chassis cannot be polarized. Use an isolation transformer when servicing the Receiver to avoid damage to the test equipmen t or to the chassis. Connect the test equipment to the proper ground ( ) or

( ) when servicing, or incorrect voltages will be measured.

WARNING: This Receiver has been designed to meet or exceed applicable safety and X-ray radiation protection as specified by government agencies and independent testing laboratories.

To maintain original product safety design standards relative to X-ray radiation and shock and fire hazard,

parts indicated with the s ymbol on the schematic must be replaced with identical parts. Order parts from

the manufacturer’s parts center using the parts numbers shown in t his service manual, or provide the chassis number and the part reference number.

For optimum perfo rmance and reliab ility, all other parts should be replaced with components of identical specification.

Procedure:

1. Tune in a station to verify that the horizontal is in sync.

2. Obtain a Monoscope pattern or a signal generator crosshatch pattern

3. Connect the voltmete r (-) lead to T PD2 an d the (+) lead to TPD1 (junction of D555 anode, R556 & R557). Set Bright level to (0 ) an d Picture for a 1.8 volt reading on the voltmeter.

4. Turn the Receiver OFF. Connect a jumpe r across IC803 pin 3 and pin 4. Apply +9 V DC to cathode of D001.

5. Reduce the AC supply voltage to approximately 45V. Connect the high voltage meter to the CRT anode. (H.V. button).

Note: Use the Dag Ground (C10 on the CRT Board)

to connect the (-) lead of the meter.

6. Turn the Receiver ON. Slowly increase the AC supply voltage and verify that the high voltages does not exceed 37.1kV when horizontal; just begins to pull ou t of sync . If the hig h voltage is no t within the specified limit, the cause must be determined and corrected before the Receiver is returned to the customer.

Horizontal Oscillator Disable Circuit

This chassis employs a special circuit to protect against excessive high voltage and beam current. If, for any reason, the high voltage and beam current exceed a predetermined level this protective circuit activates and detunes the horizontal oscillator that limits the high voltage. The over-voltage protection circuit is not adjustable. However, if components indicated by the

symbol on the schematic in either the horizontal sweep system or the over-voltage protection circuit

itself are changed, the operation of the circuit should be checked using the following procedure:

Equipment needed to check the disabled circuit:

1. Voltmeter (0 - 200V scale)

2. High Voltage Meter (0- 50kV)

3. Variac or Isolation Transformer

- 5 -

Page 6

Receiver Feature Table

FEATURE\MODEL CT-25G5B/UB

Chassis NA6LV T un ning sys tem 40K # of channe ls 181 Menu language Eng/Span/Fr Closed Caption X V-Chip X 75 Ω input X Remote Model # EUR501450 Picture tube A63QDB891X Notch filter P V/A norm V AI Sound X Built-in audio power 1.5Wx2 (10%) # of speakers 2 A/V in (rear/front) 2(1/1) Dimensions mm

(WxDxH) in Weight (kg/lbs) 34.25/75.35 Power source (V/Hz) 120/60 Anode voltage 29.25kV ± 1.25kV Video input jack Audio input jack 500mV RMS 47kΩ A-Board TNP2AH018 AB C-Board TNP2AA062 AD

600x665x634

23.62x26.18x24.96

75Ω, phono jack

p-p

Table 1. Receiver Features

Specifications are subject to change without notice or obligation. Dimensions and weights are approximate.

- 6 -

Page 7

Location of Controls (Receiver)

Figure 2. Location of Controls (Receiver).

POWER VOLUME CHANNEL ACTION TV/VIDEO

1 2 4 53

Remote Control

Sensor

Quick Reference Control Operation

Quick Reference

Control Operation

Power Button - Press to turn ON or OFF. Volu me Bu tton s - Press to adjust Sound Level, or to adjust Audio Menus, Video

Menus, and select operating features when menus are displayed Channel Buttons - Press to select programmed chan nels. Press to highlight des ired

features when menus are dis played. Also use to s elect Cable Conver ter box c hannel s

after programming R emote Control Infra-red code s (the TV/AUX/CABLE swi tch must be set in CABLE position).

Action Button - Press to display Main Menu and access On Screen feature and

Adjustment Menus.

TV/Video Button - Press to select TV or Video Input.

- 7 -

Page 8

Location of Controls (Remote) Cont.

Power Button

Press to turn ON and OFF.

Mute Button

Press to mute sound. A second press resumes sound. Press also to access

and delete Closed Caption display.

TV/Video Button

Press to select TV or Video input.

Volume Buttons

Press to adjus t TV sound level. Use

with Channel buttons to navigate in

menus.

Channel Buttons

Press to select channels. Use with

volume buttons to navigate in menus.

Action Button

Press to display Main Menu and

access or exit On Screen features and

Adjustment Menus.

Keypad Buttons

Press desired channel number to

randomly access any channel.

R-Tune (Rapid Tune) Button.

Press to switch to the previous

channel.

Recall Button

Press to display Time, status of Sleep

Timer, Channel, Video mode and

Channel Caption (Station Identifier).

EUR501450

Figure 3. Location of Controls (Remote).

- 8 -

Page 9

Component Identification

1 screw

Figure 4. Back of Television

Figure 5. C-Board

- 9 -

Page 10

Degaussing

Coil

Component Identification (cont.)

Anode (High Voltage)

CRT secured by 4 screws

Deflexion Yoke

C-Board

IC001 MPU

IC101 VCJ

Tuner

Audio/Video Inputs

Figure 6. Television’s rear view with cover removed.

T551 FlybackA-Board

Remote Control Sensor

Front Keypad

IC451 V Out

Tuner

IC2304

Audio Out

IC2303

Audio Out

Audio/Video Inputs

Figure 7. Main Board .

- 10 -

T551 Flyback

Fuse

Page 11

REPLACEMENT PARTS LIST

Model: CT-25G5B/UB

Important Safety Notice: Components printed in BOLD TYPE have special characteristics important

for safety. When replacing any of these components use only manufacturer’s specified parts.

REF NO. PART NO. DESCRIPTION

CAPRISTORS

CRA801 EXNFGV RES-CAP CRA802 EXNFGV RES-CAP

CAPACITORS

C001 ECA1AM101 CAP,E 100UF/10V C003 E CA1HM4R7 CAP,E 4.7UF/50V C004 E CJ2VC1H330J CAP,C 33PF-J-50V C005 ECJ2VC1H330J CAP,C 33PF-J-50V C008 E CJ2VF1H104Z CAP,C .1UF-Z-50V C010 ECJ2VF1H103Z CAP,C .01UF-Z-50V C011 ECA1CM221 CAP,E 220UF/16V C013 E CA0J M101 CAP,E 100UF/6.3V C016 E CJ2VC1H101J CAP,C 100PF-J-50V C017 ECJ2VC1H220J CAP,C 22PF-J-50V C018 E CJ2VC1H220J CAP,C 22PF-J-50V C019 E CA0J M101 CAP,E 100UF/6.3V C020 E CA0JM101 CAP,E 100UF/6.3V C022 E CA1CM471 CAP,E 470UF/16V C024 ECA1HM4R7 CAP,E 4.7UF/50V C025 ECJ2VC1H101J CAP,C 100PF-J-50V C026 E CA1HM010 CAP,E 1.0UF/50V C031 ECJ2VB1H821K CAP,C 820PF-K-50V C032 ECA1AM470 CAP,E 47UF/10V C033 ECJ2VC1H101J CAP,C 100PF-J-50V C035 E CJ2VC1H220J CAP,C 22PF-J-50V C036 ECJ2VC1H220J CAP,C 22PF-J-50V C037 E CJ2VC1H220J CAP,C 22PF-J-50V C038 ECJ2VC1H220J CAP,C 22PF-J-50V C101 E CJ2VF1H223Z CAP,C .022UF-Z050V C102 E CA1E M100 CAP,E 10UF/25V C103 E CJ2VC1H300J CAP,C 30PF-J-50V C105 ECJ2VC1H221J CAP,C 220PF-J-50V C106 ECA1HMR47 CAP,E .47UF/50V C107 ECJ2VC1H390J CAP,C 39PF-J-50V C108 ECA1HMR22 CAP,E .22UF/50V C109 E EAN A1E 4R7B CAP,E 4.7UF-25V C110 ECJ2VF1H103Z CAP,C .01UF-Z-50V C111 ECA1E M100 CAP,E 10UF/25V C113 ECA1EM100 CAP,E 10UF/25V C117 ECJ2VC1H120J CAP,C 12PF-J-50V C151 ECA1HMR22 CAP,E .22UF/50V C201 ECJ2VF1H103Z CAP,C .01UF-Z-50V C202 E CJ2VC1H101J CAP,C 100PF-J-50V C203 E CA1HM4R7 CAP,E 4.7UF/50V C301 E CJ2VC1H390J CAP,C 39PF-J-50V C302 E EAN A1E 1R0B CAP,E 1.0UF-25V C304 E CEA1HNR47U CAP,E .47UF-50V C305 E CA1HM4R7 CAP,E 4.7UF/50V C306 E CA1CM221 CAP,E 220UF/16V C308 E CQ B1H823 JM CAP,P .082UF-J-50V C309 ECA1AM101 CAP,E 100UF/10V

REF NO. PART NO. DESCRIPTION

C310 E CA1H M4R7 CAP,E 4.7UF/50V C311 ECA1HM4R7 CAP,E 4.7UF/50V C312 E CA1E M22 0 CAP,E 22UF/25V C314 EC J2VF1H104Z CAP,C .1UF-Z-50V C351 ECJ2VB1H391K CAP,C 390PF-K-50V C352 EC J2VB1H391K CAP,C 390PF-K-50V C353 ECJ2VB1H471K CAP,C 470PF-K-50V C354 E CKD3D102KB CAP,C .001UF-K-2KV C357 E EANA1E 1 R0B CAP,E 1.0UF-25V C370 EC A1HM100 CAP,E 10UF/50V C401 E CQB1H15 3JM CAP,P .015UF-J-50V C402 EC J2VB1H471K CAP,C 470PF-K-50V C403 E CA1H M2R2 CAP,E 2.2UF/50V C451 ECA1AM470 CAP,E 47UF/10V C452 E CSF1EE105 CAP,T 1.0UF/25V C453 EEUFC1H1R 0B CAP,E 1.0UF-50V C454 E CA1E M10 2 CAP,E 1000UF/25V C455 EC A1VHG101B CAP,E 100UF-35V C456 E CQB1H10 3JM CAP,P .01UF-J-50V C459 ECA1VM471 CAP,E 470UF/35V C460 E CQ M1104JZ CAP,P .1UF-J-100V C462 ECA1EM100 CAP,E 10UF/25V C502 E CQB1H22 3JM CAP,P .022UF-J-50V C503 ECA1HM2R2 CAP,E 2.2UF/50V C504 ECJ2VC1H101J CAP,C 100PF-J-50V C505 EC J2VU1H221J CAP,C 220PF-J-50V C506 E CA1C M221 CAP,E 220UF /16V C507 EC J2VC1H271J CAP,C 270PF-J-50V C508 ECJ2VC1H121J CAP,C 120PF-J-50V C510 ECCD2H100D CAP,C 10PF-D-500V C511 ECKD2H821KB CAP,C 820PF-K-500V C512 E CKD2H101KB CAP,C 100PF-K-500V

C531 ECA1EM220 CAP,E 22UF/25V

C532 ECA1AM102 CAP,E 1000UF/10V C533 ECJ2VF1H103Z CAP,C .01UF-Z-50V C534 EC J2VF1H103Z CAP,C .01UF-Z-50V

C551 ECA1VM331 CAP,E 330UF/35V C552 ECA1EM471 CAP,E 470UF/25V

C553 ECKD2H561KB CAP,C 560PF-K-500V C554 E CKD2H561KB CAP,C 560PF-K-500V

C555 ECA2EM220 CAP,E 22UF-250V C556 ECA1CM471 CAP,E 470UF/16V

C557 ECKD2H102KB CAP,C .001UF-K-500V C559 EC A1HM220 CAP,E 22UF/50V

C560 EEANA1E2R2B CAP,E 2.2UF-25V

C561 E CKD2H561KB CAP,C 560PF-K-500V

C563 ECWH12H822JS CAP,P .0082UF-J-1.2KV C564 ECWH12H332JS CAP,P .0033UF-J-1.2KV C565 ECKD3D471JB CAP,C 470PF-J-2KV C566 ECKD3D181JB CAP,C 180PF-J-2KV C568 ECWF2274JBB CAP,M .27UF-J-200V

PARTS LIST

158-00

- 11 -

Parts List

Page 12

REPLACEMENT PARTS LIST

Model: CT-25G5B/UB

Important Safety Notice: Components printed in BOLD TYPE ha ve special characteristics important

for safety. When replacing any of these components use only manufacturer’s specified parts.

REF NO. PART NO. DESCRIPTION

C569 EC W F 2564JBB CAP,M .56UF-J-200V

C571 E CA1E M220 CAP,E 22UF/25V C572 ECA1EM100 CAP,E 10UF/25V C573 E CA1CM101 CAP,E 100UF/16V C601 E CJ2VC1H181J CAP,C 180PF-J-50V C602 ECJ2VC1H680J CAP,C 68PF-J-50V C604 E CJ2VU1H150J CAP,C 15PF-J-50V C605 ECJ2VB1H332K CAP,C .0033UF-K-50V C606 E CA1HM010 CAP,E 1.0UF/50V

C801 ECKDAE 472Z ED CAP,C .4700PF-Z-250VA C C802 ECKDAE472ZED CAP,C .4700PF-Z-250VAC C805 EC0S2DA221BB CAP, E 220UF/200V C806 EC 0S2DA221BB CAP,E 220UF/200V

C807 E CA1HM4R7 CAP,E 4.7UF/50V C808 E CA1CM101 CAP,E 100UF/16V

C809 EC0S2DG151DG CAP,E 151UF/200V C810 EC Q U2A153MV CAP,P .015UF-M-250V C811 ECQU2A153MV CAP,P .015UF-M-250V C812 EC Q U2A224MV CAP,P .22UF-M-250VAC

C814 E CQB1H333J M CAP,P .033UF-J-50V C815 E CA1EHG101B CAP,E 100UF-25V C818 ECKD3A821KB CAP,C 820PF-K-1KVDC

C820 ECA1JHG 100B CAP,E 10UF-63V C823 ECA160V33UE CAP,E 33UF/160V

C824 E CKD3A331KB CAP,C 330PF-K-1KV C825 ECKD3A471KB CAP,C 470PF-K-1KV C2201 ECA1HM4R7 CAP,E 4.7UF/50V C2202 ECA1HM2R2 CAP,E 2.2UF/50V C2203 ECA1HM4R7 CAP,E 4.7UF/50V C2204 AP106K016CAE CAP,T 10UF/16V C2205 ECA1HMR33 CAP,E .33UF/50V C2206 ECQB1H223JM CAP,P .022UF-J-50V C2207 AP335K016CAE CAP,T 3.3UF/16V C2208 ECJ2VB1C104K CAP,C .1UF-I-16V C2209 ECJ2VB1C104K CAP,C .1UF-I-16V C2210 ECJ2VB1C104K CAP,C .1UF-I-16V C2212 ECQB1H473JM CAP,P .047UF-J-50V C2215 ECA0JM101 CAP,E 100UF/6.3V C2218 ECA1HMR47 CAP,E .47UF/50V C2220 EEANA1E100B CAP,E 10UF-25V C2302 ECA1HM3R3 CAP,E 3.3UF/50V C2303 ECA1CM100 CAP,E 10UF/16V C2304 ECQB1H104JM CAP,P .1UF-J-50V

PARTS LIST

C2306 ECA1CM471 CAP,E 470UF/16V C2307 EEANA1E1R0B CAP,E 1.0UF-25V C2309 ECA1HM010 CAP,E 1.0UF/50V C2310 ECJ2VB1H222K CAP,C .0022UF-K-50V C2311 ECA1HM4R7 CAP,E 4.7UF/5 0V C2351 ECA1EM102 CAP,E 1000UF/25V C2352 ECA1HM3R3 CAP,E 3.3UF/50V C2353 ECA1CM100 CAP,E 10UF/16V C2354 ECQB1H104JM CAP,P .1UF-J-50V

REF NO. PART NO. DESCRIPTION

C2356 ECA1CM471 CAP,E 470UF/16V C2357 EEANA1E1R0B CAP,E 1.0UF-25V C2358 ECJ2VB1H222K CAP,C .0022UF-K-50V C3001 ECA1HM010 CAP,E 1.0UF/50V C3002 ECA1HM010 CAP,E 1.0UF/50V C3003 ECA1HM010 CAP,E 1.0UF/50V C3005 ECJ2VB1H122K CAP,C .0012UF--J-50V C3006 ECJ2VB1H122K CAP,C .0012UF--J-50V

DIODES

D001 ER A15-01 DIODE D002 MA165 DIODE D003 MA4047H DIODE D006 MA4330H DIODE D008 MA165 DIODE D009 MA165 DIODE D011 MA165 DIODE D014 MA165 DIODE D015 MA165 DIODE D016 MA165 DIODE D017 MA165 DIODE D052 MA4068M DIODE, ZENER D451 ER A15-01 DIODE D452 MA4047M DIODE, ZENER D453 MA165 DIODE D461 MA27W TA DIODE D501 MA4082L DIODE

D531 AS01 DIODE D532 MA4062L DIODE D551 TVSRU2N DIODE D553 A U02 DIODE D554 AU02 DIODE

D555 MA165 DIODE D556 MA4360H DIODE, ZENER

D558 R S3FS DIODE D559 BYD33G-113 DIODE

D560 MA165 DIODE

D561 AU02 DIODE D801 GP 15KL -042 DIODE D802 GP 15KL -042 DIODE D805 TRPW5B0M050D THERMISTOR

D806 MA4056M DIODE D807 MA165 DIODE D820 EU02V1 DIODE D821 EU02V1 DIODE D822 EU02V1 DIODE D823 R L30A DIODE D824 EU02V1 DIODE

D825 T VSSR2KL DIODE, PROTECTI O N

D826 EU02V1 DIODE D829 MA165 DIODE D2302 MA165 DIODE D2312 MA4068M DIODE, ZENER

Parts List

- 12 -

158-00

Page 13

REPLACEMENT PARTS LIST

Model: CT-25G5B/UB

Important Safety Notice: Components printed in BOLD TYPE have special characteristics important

for safety. When replacing any of these components use only manufacturer’s specified parts.

REF NO. PART NO. DESCRIPTION

D3001 MA165 DIODE D3002 MA4110M DIODE, ZENER D3004 MA4110M DIODE, ZENER D3005 MA4110M DIODE, ZENER D3010 MA4110M DIODE, ZENER D3011 MA4110M DIODE , ZENER D3016 MA3056M DIODE

FUSES

F801 XBA2A00101 FUSE 6.3A 125V

INTEGRATE D CIRCUITS

IC001 MN1874088TL3 INT CKT

IC002 M24C04-WBN6 INT CKT IC003 PIC-26042SR INT CKT

IC101 AN5166K INT CKT IC451 LA7838 INT CKT

IC551 AN78M09 PLUS 9V AVR

IC552 AN78M05 PLUS 5V AVR IC801 PC817X2 INT CKT IC803 STR58041A INT CKT

IC2201 AN5829S-E1V INT CKT IC2303 LA4285 INT CKT IC2304 LA4285 INT CKT

COILS

L001 TLTA BT2R2K COIL, PEAKING 2.2UH L002 ELESN390KA COIL, PE AKING 39UH L003 TLTA BT2R2K COIL, PEAKING 2.2UH L004 TLTABT2R2K COIL, PEAKING 2.2UH L006 EXCELSA24T FERRITE BEAD L008 TLTABT470K COIL, PEAKING 47UH L009 EXCELSA35 FERRITE BEAD L012 EXCELSA 24T FERRITE BEAD L013 EXCELSA35 FERRITE BEAD L014 ELESN471JA COIL, PEAKING 470UH L103 ELESN150JA COIL, PEAKING 15UH L104 TLTABT1R0K COIL, PEAKING 1.0UH L105 EIV7EN053B COIL, VCO L106 ELESN180JA COIL, PEAK IN G 18UH L351 TLTA BT101K COIL, PEAKING

L551 TLH6663P COIL, LINEARITY

L602 ELESN120JA COIL, PEAKING 12UH

L801 ELF17N017A LINE F ILTER

L802 ELEIE680KA COIL, PEAKING 68UH L804 EXCELSA39 FERRITE BEAD L2302 TLTABT4R7K COIL, PEAKING 4.7UH

TRANSISTORS

Q001 2SD601ARTX TRANSISTOR Q002 2SC1685QRS TRANSISTOR Q003 2SB709ARTX TRANSISTOR Q004 2SB709ARTX TRANSISTOR Q302 2SD601ARTX TRANSISTOR Q304 2SD601ARTX TRANSISTOR

REF NO. PART NO. DESCRIPTION

Q351 2SC3063 TRANSISTOR Q352 2SC3063 TRANSISTOR Q353 2SC3063 TRANSISTOR Q430 2SD601ARTX TRANSISTOR Q451 2SD601ARTX TR ANS ISTOR Q452 2SD601ARTX TRANSISTOR Q501 2SC4212H TRANSISTOR

Q551 2SD2539MA1 TRANSISTOR

Q801 2SC1685RSTA TRANSISTOR Q802 2SC1384RS TRANSISTOR Q804 2SA1767Q TRANSISTOR Q2309 2SB709ARTX TRANSISTOR Q3001 2SD601ARTX TRANSISTOR

RELAYS

RL801 TSEH0005 RELAY

RESISTORS

R002 ERJ6GEYJ182 RES,M 1.8K-J-1/10 R003 E R J6GEYJ562 RES,M 5.6K-J-1/10 R004 ERDS 1TJ181 RES,C 180-J-1/2 R005 E R J6GEYJ101 RES,M 100-J-1/10 R006 ERJ6GEYJ102 RES,M 1K-J-1/10 R007 E R J6GEYJ102 RES,M 1K-J-1/10 R008 ERJ6GEYJ562 RES,M 5.6K-J-1/10 R010 E R J6GEYJ154 RES,M 150K-J-1/10 R011 ERJ6GEYJ684 RES,M 680K-J-1/10 R012 E R J6GEYJ473 RES, M 47K-J-1/10 R014 ERJ6GEYJ472 RES,M 4.7K-J-1/10 R015 E R J6GEYJ472 RES,M 4.7K-J-1/10 R016 ERJ6GEYJ472 RES,M 4.7K-J-1/10 R017 E R J6GEYJ472 RES,M 4.7K-J-1/10 R020 ERJ6GEYJ564 RES,M 560K-J-1/10 R021 E R J6GEYJ101 RES,M 100-J-1/10 R022 ERJ6GEYJ101 RES,M 100-J-1/10 R023 E R J6GEYJ102 RES,M 1K-J-1/10 R025 ERJ6GEYJ223 RES,M 22K-J-1/10 R027 E R J6GEYJ103 RES, M 10K-J-1/10

R028 ERJ6GEYJ103 RES,M 10K-J-1/10

R030 E R J6GEYJ102 RES,M 1K-J-1/10 R032 ERJ6ENF1002 RES,M 10K-F-1/10 R033 E R J6GEYJ222 RES,M 2.2K-J-1/10 R034 ERJ6GEYJ222 RES,M 2.2K-J-1/10 R035 E R J6GEYJ332 RES,M 3.3K-J-1/10 R036 ERJ6GEYJ562 RES,M 5.6K-J-1/10 R037 E R J6GEYJ103 RES, M 10K-J-1/10 R038 ERJ6GEYJ223 RES,M 22K-J-1/10 R039 E R J6GEYJ102 RES,M 1K-J-1/10 R046 ERJ6GEYJ102 RES,M 1K-J-1/10 R048 E R J6GEYJ221 RES,M 220-J-1/10 R049 ERJ6GEYJ221 RES,M 220-J-1/10 R053 E R J6GEYJ103 RES, M 10K-J-1/10 R055 ERJ6GEYJ103 RES,M 10K-J-1/10

PARTS LIST

158-00

- 13 -

Parts List

Page 14

REPLACEMENT PARTS LIST

Model: CT-25G5B/UB

Important Safety Notice: Components printed in BOLD TYPE ha ve special characteristics important

for safety. When replacing any of these components use only manufacturer’s specified parts.

REF NO. PART NO. DESCRIPTION

R060 E R J6GEYJ102 RES,M 1K-J-1/10 R065 ERJ6GEYJ471 RES,M 470-J-1/10 R066 E R J6GEYJ222 RES,M 2.2K-J-1/10 R067 ERJ6GEYJ222 RES,M 2.2K-J-1/10 R068 E R J6GEYJ222 RES,M 2.2K-J-1/10 R070 ERJ6GEYJ101 RES,M 100-J-1/10 R101 E R J6GEYJ750 RES,M 75-J-1/10 R102 ERJ6GEYJ683 RES,M 68K-J-1/10 R103 E R J6GEYJ183 RES,M 18K-J-1/10 R104 ERJ6GEYJ561 RES,M 560-J-1/10 R105 E R J6GEYJ561 RES,M 560-J-1/10 R107 ERJ6GEYJ222 RES,M 2.2K-J-1/10 R108 E R J6GEYJ471 RES,M 470-J-1/10 R152 ERJ6GEYJ183 RES,M 18K-J-1/10 R153 E R J6GEYJ223 RES,M 22K-J-1/10 R154 ERJ6GEYJ393 RES,M 39K-J-1/10 R201 E R J6GEYJ471 RES,M 470-J-1/10 R202 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R203 E R J6GEYJ222 RES,M 2.2K-J-1/10 R303 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R304 E R J6GEYJ332 RES,M 3.3K-J-1/10 R305 ERJ6ENF3001 RES,M 3K-F-1/10 R306 E RJ6ENF1801 RES,M 1.8K-F-1/10W R307 ERJ6GEYJ564 RES,M 560K-J-1/10 R308 E R J6GEYJ102 RES,M 1K-J-1/10 R309 ERJ6GEYJ683 RES,M 68K-J-1/10 R310 E R J6GEYJ273 RES,M 27K-J-1/10 R311 ERJ6GEYJ185 RES,M 1.8MEG-J-1/10W R317 E R J6GEYJ684 RES,M 680K-J-1/10 R319 ERJ6GEYJ122 RES,M 1.2K-J-1/10 R320 E R J6GEYJ102 RES,M 1K-J-1/10 R351 ERG2FJ123H RES,M 12K-J-2W R352 ER G 2F J123H RES,M 12K-J-2W R353 ERG2FJ123H RES,M 12K-J-2W R354 ERDS1TJ272 RES,C 2.7K-J-1/2 R355 E RDS1TJ272 RES,C 2.7K-J-1/2 R356 ERDS1TJ272 RES,C 2.7K-J-1/2 R357 ERJ6GEYJ301 RES,M 300-J-1/10 R358 E R J6GEYJ301 RES,M 300-J-1/10 R359 ERJ6GEYJ301 RES,M 300-J-1/10 R360 E R J6GEYJ102 RES,M 1K-J-1/10 R361 ERJ6GEYJ102 RES,M 1K-J-1/10 R362 E R J6GEYJ102 RES,M 1K-J-1/10

PARTS LIST

R363 ERJ6GEYJ101 RES,M 100-J-1/10 R364 E R J6GEYJ101 RES,M 100-J-1/10 R365 ERJ6GEYJ101 RES,M 100-J-1/10 R370 ERDS2TJ224 RES,C 220K-J-1/4 R371 E RDS2 TJ 393 RES,C 39K-J-1/4 R401 E R J6GEYJ102 RES,M 1K-J-1/10 R430 ERJ6GEYJ103 RES,M 10K-J-1/10 R432 E R J6GEYJ102 RES,M 1K-J-1/10 R451 ERDS1 FJ1R0 RES,C 1.0-J-1/2

REF NO. PART NO. DESCRIPTION

R453 E R J6GEYJ224 RES,M 220K-J-1/10 R454 ERJ6GEYJ473 RES,M 47K-J-1/10 R455 E R J6GEYJ153 RES, M 15K-J-1/10 R456 ERJ6GEYJ243 RES,M 24K-J-1/10 R457 E R J6GEYJ122 RES,M 1.2K-J-1/10 R458 ERJ6GEYJ273 RES,M 27K-J-1/10 R459 E R J6GEYJ683 RES, M 68K-J-1/10 R460 ERDS2TJ102 RES,C 1K-J-1/4 R462 E R J6GEYJ473 RES, M 47K-J-1/10 R463 ERJ6GEYJ473 RES,M 47K-J-1/10 R464 ERDS1FJ1R5 RES,C 1.5-J-1/2 R465 ERJ6GEYJ103 RES,M 10K-J-1/10 R466 E R J6GEYJ103 RES, M 10K-J-1/10 R467 ERJ6GEYJ104 RES,M 100K-J-1/10 R468 E R J6GEYJ101 RES,M 100-J-1/10 R469 ERJ6GEYJ220 RES,M 22-J-1/10 R471 E R J6GEYJ223 RES, M 22K-J-1/10 R501 ERJ6GEYJ102 RES,M 1K-J-1/10 R502 E R J6GEYJ562 RES,M 5.6K-J-1/10 R503 ERJ6GEYJ822 RES,M 8.2K-J-1/10 R504 E R J6GEYJ561 RES,M 560-J-1/10 R505 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R506 E R J6GEYJ182 RES,M 1.8K-J-1/10 R507 ERJ6GEYJ392 RES,M 3.9K-J-1/10 R508 E R J6GEYJ562 RES,M 5.6K-J-1/10 R509 ERDS 2TJ 331 RES,C 330-J-1/4

R510 ERG3FJ362H RES,M 3.6K-J-3W R511 ERG3FJ362H RES,M 3.6K-J-3W

R512 ERG2FJ392H RES,M 3.9K-J-2W

R531 ERD25F J470 RES,C 47-J-1/4W R532 ERJ6ENF5602 RES,M 56K-F-1/10W R533 ERJ6ENF2152 RES,M 21.5K-F-1/10W

R536 E R J6GEYJ223 RES, M 22K-J-1/10 R537 ERJ6GEYJ473 RES,M 47K-J-1/10

R551 ERDS1FJ1R0 RES,C 1.0-J-1/2 R552 ERDS1FJ1R0 RES,C 1.0-J-1/2 R553 ERDS1FJ1R0 RES,C 1.0-J-1/2

R556 ERJ6GEYJ272 RES,M 2.7K-J-1/10 R557 E R J6GEYJ103 RES, M 10K-J-1/10

R558 ERQ1CKPR33 RES,F .33-K-1W

R559 ERG2FJ683H R ES,M 12K-J-2W R560 ERG2FJ122H RES,M 12K-J-2W R561 ERG2FJ102H RES,M 1K-J-2W R562 ERG3FJ680H RES,M 68-J-3W R563 ERDS2TJ393 RES,C 39K-J-1/4 R564 ERDS2TJ104 RES,C 100K-J-1/4 R565 E R J6GEYJ103 RES, M 10K-J-1/10 R567 ERG2FJ471H RES,M 470-J-2W R602 E R J6GEYJ331 RES,M 330-J-1/10 R603 ERJ6GEYJ331 RES,M 330-J-1/10 R604 E R J6GEYJ331 RES,M 330-J-1/10 R611 ERJ6GEYJ333 RES,M 33K-J-1/10

Parts List

- 14 -

158-00

Page 15

REPLACEMENT PARTS LIST

Model: CT-25G5B/UB

Important Safety Notice: Components printed in BOLD TYPE have special characteristics important

for safety. When replacing any of these components use only manufacturer’s specified parts.

REF NO. PART NO. DESCRIPTION

R612 E R J6GEYJ333 RES,M 33K-J-1/10 R613 ERJ6GEYJ333 RES,M 33K-J-1/10 R614 E R J6GEYJ332 RES,M 3.3K-J-1/10

R801 E RF 7ZK1 R5 RES,W 1.5-K-7W

R805 ERDS2TJ274 RES,C 270K-J-1/4 R806 E RDS2 TJ 274 RES,C 270K-J-1/4 R808 ERDS1FJ1R0 RES,C 1.0-J-1/2 R809 ERDS1 FJ1R0 RES,C 1.0-J-1/2 R810 ERDS1FJ272 RES,C 2.7K-J-1/2 R812 E RDS1TJ183 RES,C 18K-J-1/2 R813 E R J6GEYJ562 RES,M 5.6K-J-1/10 R815 ERC12ZGM825 RES,S 8.2MEG-M-1/2 R820 E R J6GEYJ153 RES,M 15K-J-1/10 R821 ERJ6GEYJ392 RES,M 3.9K-J-1/10 R822 ERD50FJ474 RES,C 470K-J-1/2W R823 E RDS2 TJ 222 RES,C 2.2K-J-1/4 R824 ER G 3F J390 RES,M 39-J-3W R825 ERJ6GEYJ102 RES,M 1K-J-1/10

R826 ERF2AKR22 RES,W .22-K-2W

R806 E RDS2 TJ 274 RES,C 270K-J-1/4 R827 ERDS1FJ561 RES,C 560-J-1/2 R828 ERG3FJ470H RES,M 47-J-3W R829 E RQ14AJ180 RES,F 180-J-1/4 R2201 ERJ6GEYJ224 RES,M 220K-J-1/10 R2206 ERJ6GEYJ102 RES,M 1K-J-1/10 R2207 ERJ6GEYJ102 RES,M 1K-J-1/10 R2220 ERJ6GEYJ101 RES,M 100-J-1/10 R2301 ERQ2CJP120 RES,F 12-J-2W R2303 ERD25FJ1R0 RES,C 1.0-J-1/4 R2306 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R2311 ERJ6GEYJ122 RES,M 1.2K-J-1/10 R2312 ERJ6GEYJ392 RES,M 3.9K-J-1/10 R2313 ERJ6GEYJ683 RES,M 68K-J-1/10 R2314 ERJ6GEYJ104 RES,M 100K-J-1/10 R2317 ERJ6GEYJ681 RES,M 680-J-1/10 R2318 ERJ6GEYJ103 RES,M 10K-J-1/10 R2319 ERDS2TJ562 RES,C 5.6K-J-1/4 R2321 ERJ6GEYJ101 RES,M 100-J-1/10 R2322 ERJ6GEYJ472 RES,M 4.7K-J-1/10 R2353 ERD25FJ1R0 RES,C 1.0-J-1/4 R2356 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R3001 ERJ6GEYJ473 RES,M 47K-J-1/10 R3002 ERJ6GEYJ104 RES,M 100K-J-1/10 R3005 ERJ6GEYJ750 RES,M 75-J-1/10 R3006 ERJ6GEYJ391 RES,M 390-J-1/10 R3009 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R3010 ERJ6GEYJ334 RES,M 330K-J-1/10 R3011 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R3012 ERJ6GEYJ334 RES,M 330K-J-1/10 R3013 ERJ6GEYJ682 RES,M 6.8K-J-1/10 R3014 ERJ6GEYJ682 RES,M 6.8K-J-1/10

REF NO. PART NO. DESCRIPTION

R3015 ERDS2TJ181 RES,C 180-J-1/4 R3016 ERDS2TJ181 RES,C 180-J-1/4

SWITCHES

S001 EVQPF106K SWITCH S002 EVQPF106K SWITCH S003 EVQPF106K SWITCH S004 EVQPF106K SWITCH S005 EVQPF106K SWITCH S008 EVQPF106K SWITCH S009 EVQPF106K SWITCH

TRANSFORMERS

T001 TLP16297 TRANSFORMER, POW ER SUPPLY T501 TLH15452 TRANSFORMER, HORIZONTAL D T502 ETE19Z30AY TRANSFORMER, HORIZONTAL C T551 KFT4AB143F TRANSFORMER, FLYBACK T801 ETS28AE219NC TRANSFORMER

CRYSTALS/FILTERS

X001 TSSA010 X101 M1972M FILTER X102 EFCS4R5MW5BA FILTER, BANDPASS X201 SFSH4R5MDB CRYSTAL X501 TAFCSB503F38 CRYSTAL, CLOCK X601 TSS2AA001 CRYSTAL, 3.58MHZ

OTHERS

M001 A63QDB891X CRT 25”

M002 ETC33X82NA YOKE, CONVERGENCE

TNR001 ENV56D51G3 TUNER

M003 EUR501450 REMOTE CONTROL M004 UR50EC1 190A BATTERY COVER, REMOTE CON M005 TAS2AA0012 SPEAKER 16-OHM 1.5W M006 TBM2A10141 BADGE, PANASONIC M007 TJSC00300 CRT SOCKET M008 TKX2AA00403 GUIDE, IR

DY TLY2AA013 DEFLECTION YOKE

M009 TMM2A30702 WEDGE, YOKE M010 TQB2AA0326-1 MANUAL, OWNERS M011 TQB2AA7057 REMOTE GUIDE M012 TQB2AA7075 V- CHIP CANADIAN

M013 TSX2AA0111 AC LINE CORD

M014 TXFBX012BSER ASSY, 7-K EY BU TTO N M015 TXFKU45BSER AS SY, CABINET BACK M016 TXFKY23BSER ASSY, CABINET FRONT M017 TXF3A0190DA ASSY., DAG GND M018 0FMK014ZZ CONVERGENCE CORRECTOR STRIP

DEG 0LK19003-1A COIL, DEGAUSSING 25”

JK3001 TJB2A9064B ASSY. JACK A/V JK3002 TJB2AA0046 TERMINA L, FRONT A/V

PARTS LIST

158-00

- 15 -

Parts List

Page 16

SERVICEMAN MODE (ELECTRONIC CONTROL)

SERVICE ADJUSTMENT VALUES

Model _____________________________________________ Ser #_____________ Date_________________

Note: Record the original settings PRIOR to modifying the registers.

Mode

B0 B1

C3 C4 C5

Ca Cb

Service

Adjustment

SUB-COLOR

SUB-TINT

SUB-

BRIGHTNESS

SUB-PICTURE

KILLER/ABL/

GAMMA

VIDEO

ADJUSTMENT

AUDIO

ADJUSTMENT

V-SIZE

CUT-OFF R

CUT-OFF G

CUT-OFF B

DRIVE R

DRIVE B

YNR SWITCH

AFT

RF-AGC

YNR VIDEO

ADJUSTMENT

HORIZONTAL

CENTER

BEAM LIMIT

VCJ TEST H

INPUT LEVEL

HIGH-LEVEL

SEPARATION

LOW-LEVEL

SEPARATION

Adjustment

Range

Sub Adjustments

0 ~ 63 35 0 ~ 63 48

0 ~ 255 72

0 ~ 63 25

0 ~ 7 5

0 ~ 15 8

0 ~ 31 18

0 ~ 63 21

Cut-Off Adjustments

0 ~ 1

0 ~ 255 0 ~ 255 64

0 ~ 1

0 ~ 255 0 ~ 127 80 0 ~ 127 84

0 ~ 1 0 0 ~ 1

0 ~ 255 0 ~ 127 64

0 ~ 7 0

0 ~ 31 10

0 ~ 7 4 0 ~ 2 0

MTS Adjustments

0 ~ 63 31

0 ~ 63 29

0 ~ 15 8

Def.

Val.

141

136

112

Original

Value

New

Value

Mode

S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 Sa

X0 X1 X2 X3 X4

X6 X7 X8 X9 Xa

Service

Adjustment

PIP COLOR

PIP CONTRAST

UP 1/9

DOWN 1/9

LEFT 1/9

RIGHT 1/9

UP 1/16

DOWN 1/16

LEFT 1/16

RIGHT 1/16

FREERUN

CLOCK

ADJUSTMENT

PIP TINT

LOUDNESS

COMPENSATION

COMB GAIN

COMB SWITCH

COMB LIMIT

COMB CORE

COMB RF DELAY

COMB VIDEO

DELAY

COMB VMLM

COMB VM SW

COMB SHARP

COMB VM LEVEL

COMB VMPKF

COMB ADJ

SHARP

Adjustment

Range

Options Adjustments

0 ~ 127 100 0 ~ 127 52 0 ~ 255 26 0 ~ 255 146 0 ~ 255 9 0 ~ 255 103 0 ~ 255 26 0 ~ 255 163 0 ~ 255 9 0 ~ 255 118

N/A N/A

0 ~ 255 65

0 ~ 63 58

0 ~ 63 52

Comb Filter Adjustments

0 ~ 255 152 0 ~ 63 12 0 ~ 63 24 0 ~ 127 41 0 ~ 127 20

0 ~ 127 18

0 ~ 127 90 0 ~ 63 24 0 ~ 255 30 0 ~ 255 255 0 ~ 1 1

0 ~ 63 15

Def.

Val.

Original

Value

New

Value

Note: Some adjustments modes may not be

available in some models depending on available options.

Printed in USA

K00071708PL0714

- 16 -

Page 17

ABCDEFGH

A-Board Schematic - CT-25G5B/UB

MTNC000664A1

A-Board Schematic &

Side A

Sheet 1of 1

A-Board Voltage Measurements (ICs and Transistors)

Voltages

IC001

.....4.55

.....2.55

.....0.00

.....3.41

.....5.26

.....2.79

.....2.27

.....GND

.....n.c

.....5.22

.....n.c

.....GND

.....2.63

.....n.c

CT-25G5B, CT-25G5UB

.....n.c

.....0.60

.....n.c

.....5.26

.....0.00

.....n.c

.....1.29

.....1.80

.....GND

.....n.c

.....0.00

.....5.21

.....0.00

......0.00

......5.13

......5.26

......0.00

......n.c

......GND

......0.15

......4.42

......0.00

......0.22

......0.00

......n.c

......0.48

......0.00

......n.c

......0.00

......n.c

......0.00

..... **

......4.14

......n.c

......0.00

......4.25

......4.26

......5.26

..... **

......2.24

......GND

IC002

..... GND

......4.25

......4.28

..... GND

......5.27

IC451

......8.26

......4.14

......4.18

..... GND

......4.21

......3.96

.....26.79

......2.87

..... n.c

..... GND

.....15.48

.....27.68

** Probing pin may cause television shut

down or blanking the CRT.

IC551

....13.66

.....GND

.....9.05

IC552

....13.66

.....GND

.....4.99

IC803

....87.80

...129.80

...257.90

...130.10

...130.00

.....2.81

.....5.67

.....0.00

.....9.05

.....3.56

.....3.44

.....3.43

.....4.23

.....GND

.....3.66

.....4.26

.....4.29

.....0.27

.....3.44

.....4.97

.....2.75

.....GND

.....1.56

.....5.00

.....4.00

.....1.78

.....5.68

IC101

......n.c

......3.42

......2.82

......4.82

......2.16

......3.12

......2.59

......3.45

......9.05

......4.01

......4.35

......2.82

......4.39

......4.97

......2.59

......GND

......0.37

......6.08

......4.04

......2.07

......5.31

......0.86

......6.51

......4.13

IC2201

......1.26

..... n.c

......2.28

......2.18

......0.25

......4.99

......2.31

......2.45

......0.40

......2.24

......3.28

......3.43

......2.18

......3.45

......3.51

..... GND

......4.28

......4.26

..... n.c

......2.26

......2.21

..... n.c

IC2303

..... 6.30

.....GND

..... 6.31

..... 0.00

..... 0.77

..... 8.83

..... 8.90

.....GND

..... 8.98

.... 19.02

IC2304

......6.30

.....GND

......6.30

......0.00

......0.77

......8.82

......8.88

.....GND

......8.95

.....19.06

Q001

B C E

0.74

0.00

GND

Q304

B C E

3.12

9.05

2.49

Q551

B C E

0.00

-31.00 GND

Q002

5.94

10.92

5.29

Q430

0.38

2.69

GND

Q801

129.00

130.20

129.60

Q3001

B C E

0.00

9.01

GND

Q003

5.05

5.89

5.94

Q451

0.63

0.00

GND

Q802

129.80

129.90

CHIP TRANSISTOR

LEAD DESIGNATION

Q004

5.26

GND

5.25

Q452

0.00

3.66

GND

Q804

129.90

0.65

130.30

Q302

2.80

9.05

2.19

Q501

0.00

90.10 GND

Q2309

6.87

GND

0.77

Note:

Obtained voltages with a digital multimeter.

Boards Designation

• A-Board - Main Board

• C-Board - CRT Board

Voltage Measurements

1. Voltagemeasurement:

- AC input to the Receiver is 120V. NTSC (HD, 1125i & 525P when applicable) signal generator is connected to the antenna of the Receiver. (Color bar pattern of 100IREwhiteand7.5IREblack.)

- All Picture and Audio adjustments are set to Normalize. TV ANT/CABLE - (Set-Up Menu) in TV/ANT Mode Volume - Min. TV/Video SW - TV position AudioMode-Stereo

Schematic Notes

1. Resistors are carbon 1/4W unless notedotherwise.

2. Capacitors are ceramic 50V unless notedotherwise.

3. Coil value notes is inductance in

4. Test point indicated by ; Test point but no pin .

5. Components indicated with are critical parts and replacement should be made with manufacture specified replacement parts only.



- Voltage readings are nominal and may vary ±10% on active devices. Some voltage reading will vary with signal strength and picture content.

- Supply voltages are nominal.

2. Ground symbol indicates groundlead connection of meter. Incorrect ground connection will result in erroneous readings.

CAUTION: Incorrect ground

connection of the test equipment will result in erroneous readings.

6. (BOLD LINE) indicates the route of B+ supply.

7. The schematic diagrams are currentatthetimeofprintingand are subject to change without notice.

8. Ground symbol indicates HOT GROUND CONNECTION; indicates COLD GROUND.

NOTE: All other component symbols

are used for engineering design purposes.

1. indicateswaveform measurement. (Measurement can be taken at the best accessible location in common to the indicated point.)

2. TakenwithanNTSCsignal generator connected to the antenna terminal. (NTSC color bar pattern of 8 bars of EIA colors, 100 IRE white and 7.5 IRE black.)

3. Customer Controls (Picture/Audio Menu) are set to Normalize. Volume is set to “MIN”.

Waveform Measurements

IMPORTANT SAFETY NOTICE

THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES THAT ARE IMPORTANT FOR PROTECTION FROM X-RADIATION, FIRE AND ELECTRICAL SHOCK HAZARDS. WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURERS SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS DESIGNATED WITH A IN THE SCHEMATIC.

4. All video and colorwaveforms are taken with a wideband scope and a probe with low capacitance (10 to 1). Shape and peak altitudes may vary depending on the type of Oscilloscope used and its settings.

5. Ground symbol shown on waveform number indicates (Hot) ground lead connection of the Oscilloscope.

CAUTION: Incorrect ground connection of the test equipment will result in erroneous readings.

Page 18

HGFEDCBA

C-Board Schematic

CT-25G5B/UB

2.1V p-p [20s]

IC101 PIN 33 (DET OUT)

1.0V p-p [20s]

TP12

3.58MHz X’tal

IC101 PIN 1

3.58VCO

OSC Waveform

3.8-4.8V p-p [20s]

A11PIN1(R)

TP47R

Waveforms - A-Board

1.9V p-p [20s]

IC101 PIN 41 (SYNC)

4.2V p-p [5ms]

IC101 PIN 52 (VERT OUT)

24.4-29.8V p-p [5ms]

IC451 PIN 13

0.1Vp-p [20s]

IC101PIN47(HAFC)

7.4V p-p [20s]

IC101 PIN 16 (H SYNC)

146.3-172.8V p-p [20s]

Q501 collector (H DRIVE)

260-270V p-p [5s]

IC803 PIN 2

260-270V p-p [5s]

Collector of Q802

C-Board Voltage Measurements (Transistors)

Q351

B C E

3.53

148.07

3.28

Q352

3.42

152.40

3.15

Q353

3.41

152.40

3.15

2.0V p-p [20s]

IC101 PIN 39 (Y IN)

1.2-1.3V p-p [20s]

IC101 PIN 43 (C IN)

3.4-4.0V p-p [20s]

A11PIN2(G)

TP47G

3.7-4.1V p-p [20s]

A11PIN3(B)

TP47B

1.7V p-p [5ms]

IC451 PIN 7 (DRIVE)

46.7’55.1V p-p [5ms]

12 IC451 PIN 12 (VERT OUT)

503KHz X’tal

IC101 PIN 48

HOSC

OSCWaveform

3.3V p-p [20s]

IC101 PIN 50 (H OUT)

208.7-252.5V p-p [20s]

T551 PIN 1

24.4V p-p [20s]

T551 PIN 6

2.0V p-p [20s]

IC101 PIN 30

COMP SW OUT

CHIP TRANSISTOR

LEAD DESIGNATION

Boards Designation

• A-Board - Main Board

1. indicates waveform measurement. (Measurement can be taken at the best accessible location in common to the indicated point.)

2. TakenwithanNTSCsignal generator connected to the antenna terminal. (NTSC color bar pattern of 8 bars of EIA colors, 100 IRE white and 7.5 IRE black.)

3. Customer Controls (Picture/Audio Menu) are set to Normalize. Volume is set to “MIN”.

Waveform Measurements

5. Ground symbol shown on waveform number indicates (Hot) ground lead connection of the Oscilloscope.

CAUTION: Incorre ct ground connection of the test equipment will result in erroneous readings.

IMPORTANT SAFETY NOTICE

MTNC000664A1

Sheet 1 of 1

Side B

Notes:

Obtained voltages using a digital multimeter.

The board layout has been modified to enhance and display traces otherwise hidden by a mask.

• C-Board - CRT Board

Schematic Notes

1. Resistors are carbon 1/4W unless notedotherwise.

2. Capacitors are ceramic 50V unless notedotherwise.

3. Coil value notes is inductance in

4. Test point indicated by ; Test point but no pin .

5. Components indicated with are critical parts and replacement should be made with manufacture specified replacement parts only.



6. (BOLD LINE)indicates the route of B+ supply.

7. The schematic diagrams are current at the time of printing and are subject to change without notice.

8. Ground symbol indicates HOT GROUND CONNECTION; indicates COLD GROUND.

NOTE: All other component symbols

are used for engineering design purposes.

Voltage Measurements

1. Voltage measurement:

- AC input to the Receiver is 120V. NTSC (HD, 1125i & 525P when applicable) signal generator is connected to the antenna of the Receiver. (Color bar pattern of 100IREwhiteand7.5IREblack.)

- All Picture and Audio adjustments are set to Normalize. TV ANT/CABLE - (Set-Up Menu) in TV/ANT Mode Volume - Min. TV/Video SW - TV position AudioMode-Stereo

- Voltage readings are nominal and may vary ±10% on active devices. Some voltage reading will vary with signal strength and picture content.

- Supply voltages are nominal.

2. Ground symbol indicates ground lead connection of meter. Incorrect ground connection will result in erroneous readings.

CAUTION: Incorrect ground

connection of the test equipment will result in erroneous readings.

C-Board Schematic &

C Board, Waveforms,

CT-25G5B, CT-25G5UB

Voltages