Table of Contents
Advertisement
Quick Links
Service Manual
This Simplified Service Manual is issued to add listed models to the main Service Manual order No.
MTNC000146C1(CT-27G5B/CB/UB). A full set of Schematics, Pictures and a complete Parts List are included 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 designed for experienced repair technicians only and is not designed for use by the general public.
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 repaired only by experienced professional technicians. Any attempt to
service or repair the product or products dealt with in this Service Manual by anyone else could result in serious injury or death."
The service technician is required to read and follow the "Safety Precautions" and "Important Safety Notice" in this Main Manual.
Models
CT-25G5B
CT-25G5UB
Copyright 2000 by Matsushita Electric Corporation of
America. All rights reserved. Unauthorized copying
and distribution is a violation of law.
®
ORDER NO. MTNC000664A1
B5
Color Television
Main Manual
(NA6LV)
Panasonic
Chassis
AP356M
AP356M
Advertisement
Table of Contents
Related Manuals for Panasonic CT-25G5B
Summary of Contents for Panasonic CT-25G5B
- Page 1 Main Manual (NA6LV) Panasonic Models Chassis 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-27G5B/CB/UB). A full set of Schematics, Pictures and a complete Parts List are included in this Simplified Manual.
-
Page 2: Important Safety Notice
Important Safety Notice Special components are used in this television set which are important for safety. These parts are identified on the schematic diagram by the symbol and printed in BOLD TYPE on the replacement part list. It is essential that these critical parts are replaced with the manufacturer’s specified replacement part to prevent X-ray radiation, shock, fire or other hazards. -
Page 3: Table Of Contents
Important Safety Notice ....2 Safety Precautions ....2 Service Notes . -
Page 4: Service Notes
Service Notes Note: These components are affixed with glue. Be careful not to break or damage any foil under the component or at the pins of the 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 How to Replace Flat-IC (surface mount) -
Page 5: Horizontal Oscillator Disable Circuit
Service Notes (Continued) IMPORTANT: To protect against possible damage to Procedure: the solid state devices due to arcing or static 1. Tune in a station to verify that the horizontal is discharge, make certain that all ground wires and CTR in sync. -
Page 6: Receivers Feature Table
Receiver Feature Table FEATURE\MODEL CT-25G5B/UB Chassis NA6LV Tunning system # of channels Menu language Eng/Span/Fr Closed Caption V-Chip 75 Ω input Remote Model # EUR501450 Picture tube A63QDB891X Notch filter V/A norm AI Sound Built-in audio power 1.5Wx2 (10%) # of speakers... -
Page 7: Location Of Controls (Receiver)
Location of Controls (Receiver) Figure 2. Location of Controls (Receiver). POWER VOLUME CHANNEL ACTION TV/VIDEO Remote Control Sensor Quick Reference Control Operation Quick Reference Control Operation Power Button - Press to turn ON or OFF. Volume Buttons - 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 channels. -
Page 8: Location Of Controls (Remote)
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 adjust TV sound level. -
Page 9: Component Identification
Component Identification 1 screw 1 screw 1 screw 1 screw 1 screw 1 screw 1 screw Figure 4. Back of Television Figure 5. C-Board - 9 -... -
Page 10: A-Board
Component Identification (cont.) CRT secured by 4 screws Anode (High Voltage) Degaussing Coil Deflexion Yoke C-Board Tuner A-Board T551 Flyback Audio/Video Inputs Figure 6. Television’s rear view with cover removed. Remote Control Sensor IC001 MPU IC101 VCJ Front Keypad IC451 V Out Tuner T551 Flyback IC2304... -
Page 11: Parts List
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 REF NO. PART NO. DESCRIPTION... - Page 12 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 REF NO. PART NO. DESCRIPTION...
- 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 REF NO. PART NO. DESCRIPTION...
- Page 14 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 REF NO. PART NO. DESCRIPTION...
- 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 REF NO. PART NO. DESCRIPTION...
- Page 16 SERVICEMAN MODE (ELECTRONIC CONTROL) SERVICE ADJUSTMENT VALUES Model _____________________________________________ Ser #_____________ Date_________________ Note: Record the original settings PRIOR to modifying the registers. Service Adjustment Def. Original Service Adjustment Def. Original Mode Mode Adjustment Range Val. Value Value Adjustment Range Val. Value Value Sub Adjustments...
- Page 17 A-Board Schematic - CT-25G5B/UB A-Board Voltage Measurements (ICs and Transistors) IC001 IC002 IC551 IC101 IC2201 IC2303 Q001 Q002 Q003 Q004 Q302 Voltage Measurements Waveform Measurements ..4.55 ..0.00 ..GND .
- Page 18 C-Board Schematic CT-25G5B/UB Waveforms - A-Board 3.58MHz X’tal 2.1V p-p [20 IC101 PIN 1 1.9V p-p [20 24.4-29.8V p-p [5ms] 7.4V p-p [20 260-270V p-p [5 3.58VCO IC101 PIN 33 (DET OUT) IC101 PIN 41 (SYNC) IC451 PIN 13 IC803 PIN 2...