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There are currently no product reviews.
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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
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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.
HCD-VX777
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
Tape Speed Adjustment
DECK B
Note: Start the Tape Speed adjustment as below after setting to the test mode. In the test mode, the tape speed is high during pressing the CD SYNC HI-DUB button.
L-CH peak Output level
within 1dB within 1dB
Procedure: 1. Turn the power switch on. 2. Press the x button, ENTER button and DISC 3 button simultaneously. (The �TEST MODE� on the fluorescent indicator tube display while in the test mode.) To exit from the test mode, press the ?/1 button. Mode: Playback
Screw position
R-CH peak L-CH peak R-CH peak
Screw position
test tape WS-48B (3 kHz, 0 dB) set main board CN301 (Pin 3 (Pin 1
frequency counter
3. Mode: Playback
test tape P-4-A100 (10 kHz, �10 dB) L-CH MAIN board CN301 set R-CH pin 1 waveform of oscilloscope pin 3 L R pin 2 V H
+ � : L-CH) : R-CH)
oscilloscope
1. Insert the WS-48B into the deck B. 2. Press the gG button on the deck B. 3. Press the CD SYNC HI-DUB button in playback mode. Then at HIGH speed mode. 4. Adjust RV1001 on the LEAF SW board do that frequency counter reads 6,000 ± 30 Hz. 5. Press the CD SYNC HI-DUB button. Then back to NORMAL speed mode. 6. Adjust RV1002 on the LEAF SW board so that frequency counter reads 3,000 ± 15 Hz. Adjustment Location: LEAF SW board Playback level Adjustment DECK A Procedure: Mode: Playback
test tape P-4-L300J (315 Hz, 0 dB) set
in phase 45 ° good
90 ° 135 ° 180 ° wrong
DECK B
4. After the adjustments, apply suitable locking compound to the pats adjusted. Adjustment Location: Playback Head (Deck A). Record/Playback/Erase Head (Deck B).
level meter
+ �
main board CN301 (Pin 3 : L-CH)
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that adjustment within adjustment level as follows. Adjustment Level: CN301 PB level: 334.4 to 748.7 mV (�7.3 to �0.3 dB) level difference between the channels: within ±0.5 dB Adjustment Location: MAIN board Sample Volue of Wow and Flutter: 0.3% or less W. RMS (WS-48B)
forward reverse
15
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