Rolsen 25D26MA Service Manual

Download or browse on-line these Service Manual for Rolsen 25D26MA TV.

Rolsen 25D26MA Manual Information:

This manual for Rolsen 25D26MA, given in the PDF format, is available for free online viewing and download without logging on. The guide contains 52 pages, and the size of the file at download is . The document type is Service Manual.

Download Manual

Summary of Contents:

[Page 1] Rolsen 25D26MA

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...

[Page 2] Rolsen 25D26MA

TABLE OF CONTENTS SAFETY INSTRUCTIONS ........................................................................................1 ADJUSTMENTS ..............................................................................................

[Page 3] Rolsen 25D26MA

SERVICE MANUAL SAFETY INSTRUCTIONS AND MAINTENANCE WARNING: BEFORE SERVICING THIS CHASSIS, READ THE X-RAY RADIATION PRECAUTION , SAFETY PRECAUTION AND PRODUCT SAFETY NOTICE INSTRUCTIONS BELOW. X-RAY RADIATION PRECAUTION 1. The EHT must be...

[Page 4] Rolsen 25D26MA

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 resi...

[Page 5] Rolsen 25D26MA

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 speci...

[Page 6] Rolsen 25D26MA

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. Whit...

[Page 7] Rolsen 25D26MA

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 pa...

[Page 8] Rolsen 25D26MA

SERVICE MANUAL BLU Red Red/BLU GRN Red/BLU GRN BLU Red 4-pole Magnet Movement 6-pole Magnet Movement Center Convergence by Convergence Magnets ...

[Page 9] Rolsen 25D26MA

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...

[Page 10] Rolsen 25D26MA

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, e...

[Page 11] Rolsen 25D26MA

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 th...

[Page 12] Rolsen 25D26MA

SERVICE MANUAL 3. ADJUST menu Table 2 Adjustment Menu Item Description Bus Data Remarks MENU 1 AFW AFC bandwidth selection 0 For inspection only IF-FREQ IF frequency 38 For inspection only AFA Auto frequency tracing display...

[Page 13] Rolsen 25D26MA

SERVICE MANUAL CL Cathode voltage adjustment 1-BMCC CRT 5 For inspection only AKB Auto dark balance adjusting switch 0 For inspection only VSD Vertical output switch 0 For inspection only MENU 6 CB Color band pass filter IF se...

[Page 14] Rolsen 25D26MA

SERVICE MANUAL Enter the TV to the Service mode. Select “SUB-BRIGHT” by pressing the / 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. d) Adjust the sub...

[Page 15] Rolsen 25D26MA

SERVICE MANUAL SYSTEM BLOCK DIAGRAMS AND KEY ICS Block Diagram of Chassis 150-250V 50Hz Fig. 4 Chassis Block Diagram 13 ...

[Page 16] Rolsen 25D26MA

SERVICE MANUAL Block Diagram of Supply Voltage System 150-250V 50Hz Fig. 5 Block Diagram of Supply Voltage System 14 ...

[Page 17] Rolsen 25D26MA

SERVICE MANUAL Block Diagram of Remote Control Structure Fig. 6 Block Diagram of Remote Control Structure 15 ...

[Page 18] Rolsen 25D26MA

SERVICE MANUAL Key ICs And Assemblies Table 3 Key ICs and Assemblies Serial No. Position No. Type Function Description 1 N001A CH12T1007 (S3P8849XZZ) Microcontroller 2 N002 AT24C08 EEPROM 3 N301 TDA8844/OM8839PS Small signal processor...

[Page 19] Rolsen 25D26MA

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 ...

[Page 20] Rolsen 25D26MA

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. Th...

[Page 21] Rolsen 25D26MA

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 s conversion time (8-MHz CPU clock) Pulse Width Modulation Module · 14-bit PWM wit...

[Page 22] Rolsen 25D26MA

SERVICE MANUAL 2. Block Diagram Fig.9 Block Diagram 20 ...

[Page 23] Rolsen 25D26MA

SERVICE MANUAL 3. Pin Assignments Fig.10 Pin Assignment Diagram 21 ...

[Page 24] Rolsen 25D26MA

SERVICE MANUAL 4. Pin Descriptions Table 4 5. Refer to Table 13 about Functions and Ser s Pins vice Data of the IC’ 22 ...

[Page 25] Rolsen 25D26MA

SERVICE MANUAL EEPROM AT24C08 ernally organized as 1024/2048 4/128 pages×16 bytes interface bus, I 2 C-Bus le including n all pins ranges 3 . Refer to Table 14 about Functions and Service Data of the IC’s Pins. 2. Pin Configuration ...

[Page 26] Rolsen 25D26MA

SERVICE MANUAL I 2 C-bus Controlled PAL/NTSC/SECAM TV Processors OM8839PS/TDA8843/44 1. Features The following features are available in all ICs: · Multi-standard vision IF circuit with PLL demodulator without external components. · Alignmen...

[Page 27] Rolsen 25D26MA

SERVICE MANUAL 3. Block Diagram ZW 45 EW-GEOMETRY Fig.13 Block Diagram OM8839 (S-DIP 56 Envelope) 5. Refer to Table 15 about Functions and Service Data of the IC’s Pi...

[Page 28] Rolsen 25D26MA

SERVICE MANUAL DC-coupled Vertical Deflection and East-West Output Circuit TDA8350Q 1. Features ·Few external components ·Highly efficient fully DC-coupled vertical output bridge circuit ·Vertical flyback switch ·Guard circuit ·Protectio...

[Page 29] Rolsen 25D26MA

SERVICE MANUAL TDA7057AQ 2×8W Stereo BTL Audio Output Amplifier with DC Volume Control 1. Features ·DC volume control ·Few external components ·Mute mode ·Thermal protection ·Short-circuit proof ·No switch-on and switch-off clicks �...

[Page 30] Rolsen 25D26MA

SERVICE MANUAL Triple Video Output Amplifier TDA6108JF/6107Q 1. Features ·Black-Current Stabilization (BCS) circuit ·Typical bandwidth of 9.0MHz (for TDA6108JF) ·Thermal protection. or 5.5MHz (for TDA6107Q) for an output 2. General Descr...

[Page 31] Rolsen 25D26MA

SERVICE MANUAL Dual 4-channel Analog Multiplexer/Demultiplexer HEF4052 1. Description The HEF4052 is a dual 4-channel analog multiplexer/demultiplexer with common channel select logic. Each multiplexer/demultiplexer has four independent inputs...

[Page 32] Rolsen 25D26MA

SERVICE MANUAL Fig. 20 Schematic Diagram (One Switch) 3. Function Table Table 7 Inputs Channel E A 1 A 0 On L L L Y OA -Z A ; Y OB -Z B L L H Y 1A -Z A ; Y 1B -Z B L H L Y 2A -Z A ; Y 2B -Z B L H H ...

[Page 33] Rolsen 25D26MA

SERVICE MANUAL Triple 2-channel Analog Multiplexer/Demultiplexer HEF4053 1. Description The HEF4053 is a triple 2-channel analog multiplexer/demultiplexer with a common enable input (E). Each multiplexer/demultiplexer has two independent input...

[Page 34] Rolsen 25D26MA

SERVICE MANUAL Fig. 22 Pinning Diagram HEF4053P(N): 16-lead DIL ; plastic (SOT38-1) HEF4053D(F):16-lead DIL; ceramic (cerdip) (SOT74) HEF4053T(D);16-lead S0; plastic (SOT109-1) (): Package Designator North America Table 8 Pin...

[Page 35] Rolsen 25D26MA

SERVICE MANUAL 5 W Mono BTL Audio Amplifier with DC Volume Control TDA7056B 1. Features · DC volume control · Few external components · Mute mode · Thermal protection · Short-circuit proof · No switch-on and switch-off clicks · Good o...

[Page 36] Rolsen 25D26MA

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,...

[Page 37] Rolsen 25D26MA

SERVICE MANUAL Universal Hi-Fi Audio Processor for TV TDA9859 1. Features ·Multi-source selector switches six AF inputs (three stereo sources or six mono sources). ·Each of the input signals can be switched to each of the outputs (crossbar sw...

[Page 38] Rolsen 25D26MA

SERVICE MANUAL TDA9178 YUV One Chip Picture Improvement Based on Luminance Vector-, Color Vector- and Spectral Processor 1. Features · Picture content dependent non-linear Y U and V processing by luminance histogram analysis · Variable gam...

[Page 39] Rolsen 25D26MA

SERVICE MANUAL of coring according to the video level with the video dependent coring. The TDA9178 is also capable to give extra sharpness in the cases of saturated red and magenta parts of the screen using the color dependent sharpness feature...

[Page 40] Rolsen 25D26MA

SERVICE MANUAL Fig. 31 38 3 Block Diagram ...

[Page 41] Rolsen 25D26MA

SERVICE MANUAL Table 12 Functions and Service Data of TDA4605(N811)’s Pins Digital Multimeter Pin No. Function Description Reference Voltage (V) Positive Resistance (K ) Negative Resistance (K ) 1 Regulation control 0.4 0.713 0.4 2 Prima...

[Page 42] Rolsen 25D26MA

SERVICE MANUAL No. Reference Voltage (V) Positive Resistance (20K ) Negative Resistance (20K ) 29 OSC2 4.8 1300 1000 30 TEST 0 0 0 31 XIN 1.7 1500 1100 32 XOUT 1.5 1500 1100 33 RESET 4.8 12.2 12.1 34 VCC 4.8 3.4 3.4 35 P/...

[Page 43] Rolsen 25D26MA

SERVICE MANUAL 15 Audio signal output 401 8.74 5.96 16 Decoupling capacitor connection 0.02 ∞ ∞ 17 Video input 3.35 8.65 5.88 18 Black current control input 5.87 8.73 5.81 19 Blue (B) signal output 2.36 5.74 5.08 20 Green (...

[Page 44] Rolsen 25D26MA

SERVICE MANUAL Table 16 Functions and Service Data of TDA8350Q-N6 (N401)’s Pins Digital Multimeter Pin No. Function Description Reference Voltage (V) Positive Resistance (20K ) Negative Resistance (20K ) 1 Vertical drive input (positive) 2....

[Page 45] Rolsen 25D26MA

SERVICE MANUAL Table 18 Functions and Service Data of TDA6108JF/TDA6107Q’s Pins Digital Multimeter Pin No. Function Description Reference Voltage (V) Positive Resistance (20K ) Negative Resistance (20K ) 1 G inverting input 3.33 5.32...

[Page 46] Rolsen 25D26MA

SERVICE MANUAL Table 20 Functions and Service Data of HEF4053 (DS01/02/NP02)’s Pins Digital Multimeter Pin No. Function Description Reference Voltage (V) Positive Resistance (K ) Negative Resistance (K ) 1 Signal input 0 9.81 6.15 2 Sign...

[Page 47] Rolsen 25D26MA

SERVICE MANUAL Table 23 Functions and Service Data of TDA9859 (N606)’s Pins Digital Multimeter Pin No. Function Description Reference Voltage (V) Positive Resistance (K ) Negative Resistance (K ) 1 Audio input 4.14 7.62 5.85 2 Output 1 ...

[Page 48] Rolsen 25D26MA

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-814...

[Page 49] Rolsen 25D26MA

SERVICE MANUAL 47 ...

[Page 50] Rolsen 25D26MA

SERVICE MANUAL 48 ...

[Page 51] Rolsen 25D26MA

SERVICE MANUAL N606’s Pin3, Pin5, Pin7, Pin9 and Pin10 N606’s Pin11, Pin12, Pin19, Pin21 and Pin22 N606’s Pin14 49 ...

[Page 52] Rolsen 25D26MA

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 supplemen...