Related Manuals for Rolsen 25D26MA
Summary of Contents for Rolsen 25D26MA
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Page 1: Service Manual
FILE NO. SM-CTV-O-142 COLOR TELEVISION SERVICE MANUAL MODEL NO. 25D26MA/ 25D19MA/ PF25D19MA/ 29D18MA/ PF29D18MA/ 29D99MA/ PF29D99MA/ 34D18MA/ PF34D8MA CHASSIS NO. CH-10DR Please read this manual carefully before service. -
Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY INSTRUCTIONS ..................1 ADJUSTMENTS ....................... 4 SYSTEM BLOCK DIAGRAMS AND ICS..............13 SERVICE DATA ....................... 17 REPLACEMENT OF PARTS..................50 APPENDIX 1. CIRCUIT DIAGRAMS 2. PRINTED CIRCUIT BOARD LAYOUTS 3. FINAL ASSEMBLY DIAGRAMS 4. FINAL WIRING DIAGRAMS... -
Page 3: Safety Instructions And Maintenance
SERVICE MANUAL SAFETY INSTRUCTIONS AND MAINTENANCE WARNING: BEFORE SERVICING THIS CHASSIS, READ THE ¡ ° X-RAY RADIATION PRECAUTION ¡ ± ¡ ° ¡ ± ¡ ° ¡ ± SAFETY PRECAUTION PRODUCT SAFETY NOTICE INSTRUCTIONS BELOW. X-RAY RADIATION PRECAUTION 1. The EHT must be checked every time the TV is serviced to ensure that the CRT does not emit X-ray radiation as result of excessive EHT voltage. - Page 4 SERVICE MANUAL avoid electronic gun magnetized and decrement in convergence of the CRT. 6. When remounting the TV chassis, ensure that all guard devices, such as nonmetal control buttons, switch, insulating sleeve, shielding cover, isolating resistors and capacitors, are installed on the original place.
- Page 5 SERVICE MANUAL strong enough to cause an electric shock. Extreme caution should be exercised when working on the TV with the back removed. This is an international hazard symbol, telling you that the components identified by the symbol have special safety-related characteristics. FDA This symbol tells you that the critical components identified by the FDA marking have special safety-related characteristics.
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Page 6: Adjustments
SERVICE MANUAL ADJUSTMENTS Set-up Adjustments The following adjustments should be made when a complete realignment is required or a new CRT is installed. Perform the adjustments in order as follows. 1. Colour purity 2. Convergence 3. White Balance Note: The purity/convergence magnet assembly and rubber wedges need mechanical positioning. Refer to Fig. - Page 7 SERVICE MANUAL Fig. 2 2. Convergence Adjustment Note: Before attempting any convergence adjustment, the TV should be operated for at least 15 minutes. Center convergence adjustment 1) Receive the cross hatch pattern. 2) Set the brightness and contrast properly. 3) Adjust two tabs of the 4-pole magnet to change the angle between them and red and blue vertical lines are superimposed on the center area of the screen.
- Page 8 SERVICE MANUAL BLU Red Red/BLU GRN Red/BLU 4-pole Magnet Movement 6-pole Magnet Movement Center Convergence by Convergence Magnets Incline the Yoke Up (or Down) Incline the Yoke Right (or Left) Circumference Convergence by DEF Yoke Fig. 3...
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Page 9: Circuit Adjustments
SERVICE MANUAL Circuit Adjustments 1. General Description All adjustments are thoroughly checked and corrected before the TV outgoing. Therefore the TV should operate normally and deliver proper colour pictures upon installation. However, several minor adjustments may be required depending on the particular location where the TV is operated. This TV is shipped completely in carton. - Page 10 SERVICE MANUAL 5. Focus Adjustment 1) Use the remote control to set the contrast to maximum and the brightness, chroma to medium. 2) Set H. V. lines near center of Philips pattern to thinnest with the FCB on the FBT. After finishing adjustment, ensure that no poor focusing exists near the center or around of the frame.
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Page 11: Service Mode And Bus Data
SERVICE MANUAL Service Mode and Bus Data 1. To enter the D/S (Design/Service) mode a. To enter the USER SERVICE mode Set the volume to 0. Then press and hold the MUTE button on the remote control£ ¬ and press the MENU button on the TV to enter the SERVICE mode. - Page 12 SERVICE MANUAL 3. ADJUST menu Table 2 Adjustment Menu Item Description Bus Data Remarks MENU 1 AFC bandwidth selection For inspection only IF-FREQ IF frequency For inspection only Auto frequency tracing display For inspection only Auto frequency tracing display ABOVE For inspection only AGC-TAK AGC control data...
- Page 13 SERVICE MANUAL Cathode voltage adjustment For inspection only £ ¨ 1-BMCC CRT£ © Auto dark balance adjusting switch For inspection only Vertical output switch For inspection only MENU 6 Color band pass filter IF selection For inspection only Color sub-carrier output switch Comb filter TD9181: 1-Yes£...
- Page 14 SERVICE MANUAL Enter the TV to the Service mode. Select “SUB-BRIGHT” by pressing the ¡ û /¡ ú buttons on the remote control£ ¬ and set the data to 31 by pressing the data adjustment buttons. Operate the TV for 5 minutes in the mode.
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Page 15: System Block Diagrams And Ics
SERVICE MANUAL SYSTEM BLOCK DIAGRAMS AND KEY ICS Block Diagram of Chassis... - Page 16 SERVICE MANUAL Block Diagram of Supply Voltage System...
- Page 17 SERVICE MANUAL Block Diagram of Remote Control Structure...
- Page 18 SERVICE MANUAL Key ICs And Assemblies Table 3 Key ICs and Assemblies Serial Position No. Type Function Description N001A CH12T1007 (S3P8849XZZ) Microcontroller N002 AT24C08 EEPROM N301 TDA8844/OM8839PS Small signal processor N401 TDA8350Q Vertical output circuit N601 TDA7057AQ Sound power amplifier N606 TDA9859 Audio processor...
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Page 19: Service Data
SERVICE MANUAL SERVICE DATA Technical Data of Key ICs Power Control Circuit TDA4605 Control IC for Switched-Mode Power Supplies Using MOS-Transistor 1. Features ¡ ¤ Fold-back characteristics provide overload protection for external components ¡ ¤ Burst operation under secondary short-circuit condition implemented ¡... - Page 20 SERVICE MANUAL Microcontroller S3P8849XZZ/CH12T1007 S3C8835/C8837/P8837/P8849 The S3C8835 microcontroller has 16K bytes of on-chip program memory and the S3C8837 has 24K bytes. Both chips have a 272-byte general-purpose internal register file. The interrupt structure has seven interrupt sources with six interrupt vectors. The CPU recognizes six interrupt priority levels.
- Page 21 SERVICE MANUAL · One general-purpose 8-bit timer/counters with interval timer mode (timer A) A/D Converter · Two analog input pins; 4-bit resolution · 3.125 ¦ Ì s conversion time (8-MHz CPU clock) Pulse Width Modulation Module · 14-bit PWM with one-channel output (push-pull type) ·...
- Page 22 SERVICE MANUAL 2. Block Diagram Fig.9 Block Diagram...
- Page 23 SERVICE MANUAL 3. Pin Assignments Fig.10 Pin Assignment Diagram...
- Page 24 SERVICE MANUAL 4. Pin Descriptions Table 4 5. Refer to Table 13 about Functions and Ser vice Data of the IC’ s Pins...
- Page 25 SERVICE MANUAL EEPROM AT24C08 1. Features ·Data EEPROM int ernally organized as 1024/2048 bytes and 6 4/128 pages×16 bytes 2. Pin Configuration ·Page protection mode, flexible page-by-page hardware write protection -Additional protection EEPROM of 64/128 bits, 1 bit per data page -Protection setting for each data page by writing its protection bit -Protection management without switching...
- Page 26 SERVICE MANUAL C-bus Controlled PAL/NTSC/SECAM TV Processors OM8839PS/TDA8843/44 1. Features 2. General Description The following features are available in all The various versions of the TDA884X/5X ICs: series are I C-bus controlled single chip TV · Multi-standard vision IF circuit with PLL processors which are intended to be applied in demodulator without external components.
- Page 27 SERVICE MANUAL 3. Block Diagram 5. Refer to Table 15 about Functions and Service Data of the IC’s Pins.
- Page 28 SERVICE MANUAL DC-coupled Vertical Deflection and East-West Output Circuit TDA8350Q 1. Features ·Few external components ·East-West output stage with one single ·Highly efficient fully DC-coupled vertical output conversion resistor. bridge circuit ·Vertical flyback switch 2. General Description ·Guard circuit The TDA8350Q is a power circuit for use in 90° ·Protection against: and 110°...
- Page 29 SERVICE MANUAL TDA7057AQ 2×8W Stereo BTL Audio Output Amplifier with DC Volume Control 1. Features 2. General Description ·DC volume control The TDA7057AQ is a stereo BTL output ·Few external components amplifier with DC volume control. The device ·Mute mode is designed for use in TVs and monitors, but is ·Thermal protection also suitable for battery-fed portable recorders...
- Page 30 SERVICE MANUAL Triple Video Output Amplifier TDA6108JF/6107Q ·Black-Current Stabilization (BCS) circuit 1. Features · Typical bandwidth of 9.0MHz (for TDA6108JF) ·Thermal protection. or 5.5MHz (for TDA6107Q) for an output 2. General Description signal of 60 V (peak-to-peak value) The TDA6108JF includes three video output ·High slew rate of 1850V/¦...
- Page 31 SERVICE MANUAL Dual 4-channel Analog Multiplexer/Demultiplexer HEF4052 1. Description With E LOW, one of the four switches is The HEF4052 is a dual 4-channel analog selected (low impedance ON-state) by A multiplexer/demultiplexer with common . With E HIGH, all switches are in the high channel select logic.
- Page 32 SERVICE MANUAL Fig. 20 Schematic Diagram (One Switch) 3. Function Table Table 7 Inputs Channel none Notes H=HIGH state (the more positive voltage) L=LOW state (the less positive voltage) X=state is immaterial Ratings Limiting values in accordance with the Absolute Maximum System (IEC 134) Supply voltage (with reference to V -18 to +0,5 V Note...
- Page 33 SERVICE MANUAL Triple 2-channel Analog Multiplexer/Demultiplexer HEF4053 selected switches high 1. Description The HEF4053 is a triple 2-channel analog impedance OFF-state, independent of S multiplexer/demultiplexer with common enable input (E). Each supply voltage multiplexer/demultiplexer has two independent connections for the digital control inputs (S inputs/outputs common and E).
- Page 34 SERVICE MANUAL Table 8 Pinning to Y Independent inputs/outputs to Y Independent inputs/outputs to Sc Select inputs Fig. 22 Pinning Diagram Enable input (active LOW) to Z Common inputs/outputs HEF4053P(N): 16-lead DIL ; plastic (SOT38-1) Table 9 Function Table HEF4053D(F):16-lead DIL; ceramic Inputs Channel (cerdip)
- Page 35 SERVICE MANUAL 5 W Mono BTL Audio Amplifier with DC Volume Control TDA7056B 1. Features 2. General Description · DC volume control The TDA7056B is a mono Bridge-Tied Load · Few external components (BTL) output amplifier with DC volume control. ·...
- Page 36 SERVICE MANUAL Dual Operational Amplifier TA75558P The TA75558P, TA75558S and TA75558F are Low-Noise Operational Amplifiers with High Speed and Wide Bandwidth. 1. Features · Internal Frequency Compensation Type · Pin Compatible with TA75558P, TA75558S and TA75558F · Possible to Exchange the Position of 9 Pin for 1 Pin Because of Pin Connection Being Symmetric.
- Page 37 SERVICE MANUAL Universal Hi-Fi Audio Processor for TV TDA9859 externally 1. Features ·Multi-source selector switches six AF inputs ·Two general purpose logic output ports (three stereo sources or six mono sources). ·I C-bus control of all functions. ·Each of the input signals can be switched to 2.
- Page 38 SERVICE MANUAL TDA9178 YUV One Chip Picture Improvement Based on Luminance Vector-, Color Vector- and Spectral Processor ratio of the most important parts of the scene 1. Features will be improved. Black restoration is available · Picture content dependent non-linear Y£ ¬ U in the event of a set-up in the luminance and V processing by luminance histogram signal.
- Page 39 SERVICE MANUAL of coring according to the video level with the separate pin) is available that detects when video dependent coring. The TDA9178 is also picture content has been changed capable to give extra sharpness in the cases significantly, called cue flash. of saturated red and magenta parts of the screen using the color dependent sharpness An embedded 6-bit ADC can be used for...
- Page 40 SERVICE MANUAL 3£ ® Block Diagram Fig. 31...
- Page 41 SERVICE MANUAL Service Data of Key IC’s Table 12 Functions and Service Data of TDA4605(N811)’s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (K¦ ¸ ) Negative Resistance (K¦ ¸ ) Regulation control 0.713 Primary current input 1.34 9.71 1.34 Primary voltage monitoring input...
- Page 42 SERVICE MANUAL Reference Voltage (V) Positive Resistance (20K¦ ¸ ) Negative Resistance (20K¦ ¸ ) OSC2 1300 1000 TEST 1500 1100 XOUT 1500 1100 RESET 12.2 12.1 1500 1100 20.4 MUTE 25.7 25.6 25.7 25.6 STANDBY Table 14 Functions and Service Data of AT24C08-10P (N002)’s Pins Digital Multimeter Function Description Reference Voltage (V)
- Page 43 SERVICE MANUAL Audio signal output 8.74 5.96 Decoupling capacitor connection 0.02 ∞ ∞ Video input 3.35 8.65 5.88 Black current control input 5.87 8.73 5.81 Blue (B) signal output 2.36 5.74 5.08 Green (G) signal output 2.41 5.74 5.08 Red (R) signal output 2.39 5.74 5.08...
- Page 44 SERVICE MANUAL Table 16 Functions and Service Data of TDA8350Q-N6 (N401)’s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (20K¦ ¸ ) Negative Resistance (20K¦ ¸ ) Vertical drive input (positive) 2.33 8.82 Vertical drive input (negative) 2.28 8.83 5.83 Feedback input...
- Page 45 SERVICE MANUAL Table 18 Functions and Service Data of TDA6108JF/TDA6107Q’s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (20K¦ ¸ ) Negative Resistance (20K¦ ¸ ) G inverting input 3.33 5.32 4.72 R inverting input 3.26 5.32 4.72 B inverting input 3.28 5.32...
- Page 46 SERVICE MANUAL Table 20 Functions and Service Data of HEF4053 (DS01/02/NP02)’s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (K¦ ¸ ) Negative Resistance (K¦ ¸ ) Signal input 9.81 6.15 Signal input Signal input 9.81 6.15 Signal output 6.66 6.21 Signal input...
- Page 47 SERVICE MANUAL Table 23 Functions and Service Data of TDA9859 (N606)’s Pins Digital Multimeter Function Description Reference Voltage (V) Positive Resistance (K¦ ¸ ) Negative Resistance (K¦ ¸ ) Audio input 4.14 7.62 5.85 Output 1 7.86 6.26 Audio input 4.14 7.61 5.84...
- Page 48 SERVICE MANUAL Waveforms of Key ICs Note: The TV receives NTSC color bar with 1KHz sine wave audio reception in Normal mode when measuring voltage and resistance with a GDM-8145 multimeter (Max. resistance: 20 K¦ ¸ , Max. DC voltage :20V).
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- Page 50 SERVICE MANUAL...
- Page 51 SERVICE MANUAL N606’s Pin3, Pin5, Pin7, Pin9 and Pin10 N606’s Pin11, Pin12, Pin19, Pin21 and Pin22 N606’s Pin14...
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Page 52: Replacement Of Parts
SERVICE MANUAL REPLACEMENT OF PARTS 1. Description Many electrical and mechanical components in this chassis have special safety-related characteristics. Components which have these special safety characteristics in this manual and its supplements are identified by the international hazard symbols or UL, FCC, FDA or VDE marking on the circuit diagram and parts list.