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CHASSIS Pro 4400
BUSH
3463NTX 3472NTX WS6667 WS7667 WST66
ORION
3850 TV2844W TV4400NTX
DECCA / TATUNG GRUNDIG
T70-1020 WF82-3020
MATSUI
28N03 32WN03
D28N440 D28W440 D28W441 T21N421 T25N440 T28N440 T32W440 T32W441S
and many others
Chassis Pro 4400
General Information
Used in Bush, Goodmans, Grundig, Matsui, Orion, Tatung, etc
4. Control bytes (Cox) These are control registers that must be set as follows: Co4 Co3 Co2 00 27 96
Waveforms
5. Option bytes (Opx) The correct values to set for each appliance are given on the label on the back cover alongside the notations Op3, Op2 and Op1.
Service Adjustments
Power supply Use potentiometer PP1 to adjust the HT for 151V ± 0.5V for 16:9 tubes at the TSP28 terminals. Activating service mode 1. Switch on the appliance whilst holding down the MENU key at the cabinet controls until the red LED lights up. 2. Release the MENU button at the cabinet and press the standby key on the remote control. The appliance will default to programme 1, or to AV1 if pin 8 of SCART 1 is connected to a voltage of ±12V. It is therefore important to make certain that the test signal needed to make the adjustments is available either on programme 1, or on the SCART 1 input, as selection of the sources is not possible thereafter in service mode. 3. The functions that can be adjusted (listed below) are selected using the P+ and P-- keys on the remote control and the adjustments then made with the Volume ± keys. It is advisable to make a note of initial values before making any changes so that they can be restored if necessary. In the event of replacing the NVM memory or the microprocessor, it is essential to make all the adjustments accessible in service mode, since the replacement memory is supplied
without any prior programming and a new microprocessor requires initialization. 1. IF video setting (IFxx AFCxx) This adjustment requires special equipment and will be needed only for the ICC2 N1 version, which is also recognisable by the presence of the LC7 coil. If the coil is present, adjust IF and AFC to the values given on the label affixed to the left side of the main PCB so that a suitable approximation is achieved. If the coil is not present, adjust as follows: IF AFC 50 3
6. Audio/stereo A2 decoder (LA/SA) The LA and SA functions allow adjustment of the separation between the right and left audio channels, and of the respective levels. An RF stereo generator is therefore required. Disconnect modulation to the left hand channel and adjust LA to give 1.4Vp-p at pin 1 of the SCART 1 connector. Then adjust SA for the minimum residual signal at pin 3 of SCART 1. If a stereo generator is not available, set LA to 01 and SA to 0B to obtain a fair approximation. 7. Setting the luminance/chrominance delay (Yx) The delay must be adjusted to the following values:
Vp Vs Vn Yo 18 30 20 22 (PAL) (SECAM) (NTSC) (SCART) (UK VERSIONS)
2. Initialization (INIT CTV 831 x (VERSION) The initialization procedure, which also indicates the software version for the microprocessor, is enabled with the Volume + key and must be carried out whenever the NVM memory or the microprocessor is replaced. Bear in mind that initialization has the effect of erasing all data from the memory except for the bytes option. 3. Screen grid voltage (Vg2 Test) Having selected the function, press the Volume + key. A luminous horizontal line appears in the middle of the screen. Adjust potentiometer G2 on the EHT transfonner so that the line is just visible (in a dimly lit room). Then press Volume -- and wait for a few seconds until service mode is restored.
The Yn function is only accessible if the signal is NTSC coded (standard accepted only by SCART) 8. On screen display (OSD) Load the fixed value 3F. (AUDIO MENU APPEARS) 9. White control (WB/WG/WR) Using a black and white bar signal, adjust to obtain a correct grey scale. 10. Horizontal geometry (TC/CP/PW/EW/HSH) There are two groups of these functions, one for 4:3 format (suffix 4) and one for 16:9 format (suffix 16), both of which must be adjusted because they are used in the zoom function (4:3 tubes included). The functions of the single parameters are as follows:
TC CP PW EW HSH Trapezium correction (The four adjustments appear in 4x3 and 16x9) Corner parabola correction Parabola correction Horizontal amplitude Horizontal shift
Recommended Safety Parts
Item Part No.
S068055309 S092503809 S060328549 S067203419 S030242209 S030242209 S044010109 S044010479 S044011009 S044011509 S044013309 S044013309 S047501009 S047502209 S047504709 S0475 10009 S048002209 S048002209 S048222009 S048222009 S053051009 S053210709 S063411019 S065621409 S065621419 S065708009 S065708009 S06654 1709 S047033009 S070001209 S068055319 S092503809 S060325219 S067202019 S068055319 S092503809 S060328029 S067202119 S068055309 S092503809 S060332009 S067203319
Description
Mains switch Mains cable CRT 28" W66EHU013X010 Degauss coil Capacitor 220n, 250VAC Capacitor 220n, 250VAC Fusible resistor 1R Fusible resistor 4R7 Fusible resistor 10R Fusible resistor 15R Fusible resistor 33R Fusible resistor 33R Fusible resistor 1R SMD Fusible resistor 2R2 SMD Fusible resistor 4R7 SMD Fusible resistor 10R SMD Fusible resistor 2R2 Fusible resistor 2R2 Fusible resistor 2k2 Fusible resistor 2k2 Safety resistor 1M VR37 Safety resistor 4M7 VR68 I.C.TCD T 1101 GB Flyback transformer 110° (Eldor) Flyback transformer 110° (Orega) Power switch transformer (Eldor) Power switch transformer (Orega) Line filter Fusible resistor 33R CRT socket Mains switch (D25N440) Mains cable (D25N440) CRT 25" A59EHJ43X31 (D25N440) Degauss coil (D25N440) Mains switch (T28N440) Mains cable (T28N440) CRT 28" A66EAK071X01 (T28N440) Degauss coil (T28N440) Mains switch (T32W440) Mains cable (T32W440) CRT 32" W76EDX013X010 (T32W440) Degauss coil (T32W440)
CP1 CP3 RC45 RS22 RS41 RL8 RL18 RV19 RR53 RR64 RS33 RS52 RF8 RF9 RE15 RL16 RP1 RP21 ICP2 TRL1 TRL1 TRP1 TRP1 LP1 RV19 CNV3
In the case of 4:3 format picture tubes, enter EW16 = 3F to ensure proper zooming. 11. Vertical geometry (SC/VSH/VA/VS) Vertical geometry is adjusted starting with the VS (vertical slope), which is set so that the central horizontal line of the test signal is exactly at the boundary between the visible image and the black part below and must not then be changed again. The functions of the single parameters are as follows:
SC VSH VA VS Vertical Vertical Vertical Vertical S-correction (linearity) shift amplitude slope
12. AGC tuner setting (AG) With a signal of lmV applied to the aerial input on an UHF channel, adjust to 4Vdc at pin 1 of the tuner. 13. De-activating service mode Once all the necessary adjustments have been made, press TV or MENU OFF on the remote control to save all the changes and return the appliance to normal operating mode.
Chassis Pro 4400
Audio Nicam Diagram
Chassis Pro 4400
CPU Micro Diagram
Chassis Pro 4400
CRT Diagram
Chassis Pro 4400
Deflection Diagram
Chassis Pro 4400
Power Supply Diagram
Chassis Pro 4400
Scart Audio Amp Diagram
Chassis Pro 4400
Tuner Front End Diagram