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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
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Very good detail, all pages clear, exactly what I needed
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Excellent service, and just what I needed to service my TU-7700. All pages of the manual are clear and easily readable.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
BLOCK DIAGRAM
Antenna
3 1 TU200 Tuner 2 Q200 IF Amp.
IC200 4 Video Sound Det. Det FM AFT Circuit AGC Circuit VR600 Audio Amp. Volume Control IC600 Speaker
7
IC270
5
IC300 Chroma Circuit LCD
Tuning Voltage Generator
6
IC700 Display Control Auto-Tuning Control
Power Supply
VCC2 (4.5±0.02V) VCC7 (25.9~31.3V) VCC6 (10.8~12.0V) VEE1 (�8.5~�7.5V) VEE2 (�19.8~�17.2V)
1 2 3
� Color Tuner: TU200 TEPU5-02 Selects a desired radio wave and changes it to the video IF signal. � Video IF Amp.: Q200 2SC4670 Amplifies the video IF signal output from the tuner TU by 10 times (20 dB). � Video Det./Sound Det./FM Det./AFT/AGC: IC200 M51348FP Eliminates the carrier wave in the video IF signal, and picks up the video signal and the sound IF signal. Also, the sound signal is picked up from the sound IF signal by FM detection. � Audio Amp.: IC600 NJM2070M Sound amplification. � Chroma Circuit: IC300 IR3P90B Generates the tricolor (red, green, and blue) from the video signal. � Display Control/ Auto-Tuning Control : IC700 MSM6770GS Controls the display. � Tuning Voltage Generator: IC270 BA10358F Generates the tuning voltage with the tuning pulse (TU) output from 6.
4 5 6 7
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