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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+++++++++++++++++++++++++
SECTION 3 ELECTRICAL ADJUSTMENTS
The set should be connected to a master unit for electrical adjustments (See page 2). Local OSC Adjustment Setting:
ANTENNA jack
oscilloscope main board TP LO
Frame Sync Adjustment Setting: ANT +B switch : ON
oscilloscope ANTENNA main board TP IF2 CH-1 set CH-2
Procedure: 1. Adjust T102 so as to maximize the peak of waveform at 35.84 MHz. Adjustment Location: See page 6. IF2 Output Gain Adjustment Setting:
digital voltmeter main board TP LEL
main board TP FSYNC
Procedure: 1. Receive the DAB signal. 2. Adjust RV104 so that the rising edge of waveform of TP FSYNC is positioned A. (1) In case of Band ��� (from channel 5A to 13F)
TP IF2
TP FSYNC
Procedure: 1. Adjust RV101 so that the reading on digital voltmeter is 2.25 V. Adjustment Location: See page 6. AGC Adjustment Setting: ANT +B switch : OFF
�1.68000 ms �680.00 us 200 us / div 5.00000 V
A
320.00 us realtime
1 500 mV/ 2 2.00 V /
�1.12500 V
(2) In case of L Band (from channel L1 to L23)
RF SSG ANTENNA jack digital main board voltmeter TP AGC 0.01 µF set
TP IF2
output level : 90 dBm (32 mV) Non-modulation
A
TP FSYNC
Procedure: 1. Set the carrier frequency of RF SSG to 225.648 MHz. 2. Receive the channel 12B (225.648 MHz). 3. Adjust RV102 so that the reading on digital voltmeter is 3.1 ± 0.5 V. 4. Set the carrier frequency of RF SSG to 1471.792 MHz. 5. Receive the channel L12 (1471.792 MHz). 6. Adjust RV103 so that the reading on digital voltmeter is 3.2 ± 0.5 V. Adjustment Location: See page 6.
�370.00 us
1 500 mV/ 2 2.00 V /
125.000 mV 3.00000 V
�120.00 us 50.0 us / div
130.00 us realtime
Adjustment Location: See page 6.
�5�
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