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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
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Very good detail, all pages clear, exactly what I needed
HP S7500/MV7500/CV7500
below 4.0 V, the ABL function will happen.
3-3-8 H/V size breathing compensation
1. Beam current is sensed as above section (3-3-7 item 2) and this voltage routes through R451, R468, C470 then through R437 to pin 31 of I401 for H. size compensation. 2. HV voltage is detected through T402(FBT) pin 11. C481, R4F4, R4F8, C430, R411, pin 5, 6, 7 of I403 (KA324) then through R302 to I401 pin 21 for V. size compensation.
3-3-9 Dynamic focus circuitry
The dynamic focus is applied to improve the corner focus performance, it includes horizontal and vertical dynamicfocus. 1. Horizontal dynamic comes from Idy current through T403, R434, C448, R428 and feed to FBT dynamic focus pin (T401 pin 12). 2. Vertical dynamic comes from pin 32 of I401 through C315, R309, R326, R322, R323, Q301, R324, R325 and feed to FBT dynamic focus pin.
3-4 Power Supply Section
3-4-1 AC Rectifier
The circuit can accept 90 V to 264 V AC input through D801~D803 bridge diodes and C808 filtering to get DC 126 V~364 V for power conversion in T802.
3-4-2
Line Filter
It consists of C803, T801, C804, C805, C808, C819, C807, C817 and meets EMI regulation.
3-4-3
Power LED Status
1. The LED has 3 leads with common cathode to emit green and amber color light for different power saving states. It is controlled by CPU. 2. Normal : Green light Amber LED is off because CPU pin 29 is 1.96V and pin 24 is 0.45V, only green LED is turned on. 3. Off Mode : Amber light CPU pin 24 is 1.87V and pin 29 is 0.46V, then green is off and amber is illuminated.
3-4-4 Auto Degaussing
When S801 turns on, pin 27 of I701 will send a signal to Q802 and turns on RL801 for degaussing. After 4 seconds, it will turn off RL801 automatically.
3-4-5 PWM Control
1. Start Up The I801 (5S0765C) gets power from R807, R808, C830 and pin 3 voltage reaches 15 V for starting up. The I801 starts oscillation at 20 kHz, pin 1 output to drive T802. Switching on, R819 set up an 15 V to keep I801 working through D809 auxiliary voltage.
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