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There are currently no product reviews.
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The manual was very accurate for the part that I was changing, I was able to order the correct part and had no issues with the replacement procedure. However, I was expecting to have more detailed repairs for the lower drive unit.
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I needed the manual immediately and I got it immediately. I couldn't find this manual anywhere else on the net. The site was easy to traverse, and the price was very reasonable. I'll definitely be back for any future needs.
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I received a good service manual, with good resolution. Improve the instructions for the purchase because they are not well understood.
For the rest, so good.
Thanks Angel.
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Very good documentation for the Grundig 2077 model (as well as similar 800/900/1000 series radios). The first two pages are a summary of reception specifications and output capability. The third page is the tuner dial indicator and dial cord routing diagram. the final ~5 pages are the schematics for the various models (including 2077). The scan quality of the schematics are good, adn can be easily read if zoomed in. The documents are in German, not English as stated. It would have been nice to have the tuning sequence and settings, and some trouble shooting materials... or component and wiring map.
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Perfect like it was descriped, Perfect like it was descriped
HORIZONTAL AND VERTICAL DEFLECTION LOOP NTSC CHROMA ADJUSTMENT
SAME LEVEL
NO. Adjustment part Adjusting procedure conditions Waveform and others
V-LINEARITY Monoscope Pattern Signal. 1 SUB-TINT 1. Receive the "NTSC3.58 Colour Bar" signal
2
2. Call the "V-LIN" mode. (I C BUS through AV in.
3. Increase or decrease "V-LIN" by Volume key till CONTROL) 2. Connect the oscilloscope to TP853 (Pin (5) of » Sweep time : 10 µsec/div.
horizontal line in the center of monoscope is P882) BLUE-OUT. just at position where the blanking starts. » Range : 100mV/div. (AC)(Use Probe 10:1)
2 V-CENTER 1. Call the "V-CENT" mode.
2
(I C BUS 2. Increase or decrease "V-CENT" by Volume key 3. Call the "SUB-TINT" mode in service mode. waveform shown as Fig. 9.
CONTROL) till picture is centered. Adjust "SUB-TINT" bus data to obtain the W Y Cy G Mg R B
3 V AMP 1. Call "V-AMP" 4. Clear the SERVICE mode. Fig. 9
2
(I C BUS 2. Increase or decrease "VAMP" by Volume key
CONTROL) to set overscan of 9.5% typical.
Adjustment Spec 9.5% range +1% -0%.
4 S-CORRECFIXED DATA, NO NEED TO ADJUST.
PROTECTOR OPERATION CHECKING
PROTECTOR 2. Set CONTRAST MAX. each short test. 3. Set BRIGHT MAX. 5 H CENTER 1. Call the "H-CENT" mode. 4. During the Collector & Emitter of Q883/5/7 2. Increase or decrease "H-CENT" by Volume key short, make sure the protector ON and switch to center the picture horizontal. to standby mode.
NO. Adjustment part Adjusting procedure conditions Waveform and others BUS CONTROL) 1 BEAM 1. Receive "Monoscope Pattern" signal. * Select one of Q883/5/7 to do
2
TION (I C
6 SUB1. Call the "SUB-SHP" mode.
SHARPNESS 2. Set "SUB-SHP" to 20 by pressing Volume down 2 H, V 1. Receive "Monoscope Pattern" signal.
key. PROTECTOR 2. Connect output of Bias Box to D607 cathode (R606 side). 3. Set voltage of Bias Box to 18V and make sure protector is not work. 7 Focus 1. Receive the "Monoscope Pattern" signal.
9
3 Other 1. Once finish rectified Electrolytic Capacitor short protectors testing in +B line, check all possible damaged
Cy G B NO. Adjustment part Adjusting procedure conditions Waveform and others
adjustment 2. Press R/C set Picture NORMAL condition. 4. Set voltage of Bias Box to 27V, and make sure
3. Adjust focus control to get best focus. the protector is work.
components on +B line.
(Use random selected set for inspection)
PAL CHROMA ADJUSTMENT
NO. Adjustment part Adjusting procedure conditions Waveform and others
1 SUB COLOUR 1. Receive the "PAL Colour Bar" signal.
2
(I C BUS 2. Press R/C to set Picture Normal condition. (C881 and R885). AUDIO OUTWhite Color Bar, Sound 400 Hz 100% Mod.) » Sweep time : 10 µsec/div. PUT CHECK 2. Terminate the Video output with a 75 ohm im-
CONTROL) 3. Connect the oscilloscope to Red cathode
CHECKINGOUTPUTANDINPUTA/V
» Range : 20 V/div. (AC) (Use 10:1 probe) 1 VIDEO AND 1. Receive the "PAL Colour Bar" signal (100%
4. Using R/C call "SUB COL" in SERVICE pedance. Make sure the output is as specified
mode. Adjust SUB COLOUR bus data, so that (1.0 Vp-p ±3 dB). 75% White & Red portions of PAL Colour W Y 100%W Mg R 3. Terminate the Audio output with a 10k ohm imBar be at same level shown Fig. 8. 75% pedance. Make sure the output is as specified
5. Clear the SERVICE mode. (1.76 Vp-p ±3 dB). Fig. 8 2 VIDEO AND 1. Using TV/AV key on the remote controller, AUDIO INPUT make sure that the modes change in order of CHECK TV, AV1, AV2 TV again and the video & audio output are according to the input terminal for each mode.
CX48K4
9-1 9-2
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