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This is a good quality scan of the original Service Manual from Nordmende, Germany. Contains the circuit diagram, PCB layout, adjust/tune instructions as well. It is NOT in English but in GERMAN language! That was quite right for my german friend from the lower east side in Berlin.
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Received via e-mail this PDF manual is worth the money. This is a quality scan of a manual in excellent condition and is just as good as having the original manual in hand. I have later seen the original manual and it was printed in colour, but this particular manual is black & white but scan resolution is high end quality! All drawings and pictures are presented in great detail. So, nearly perfect score in my opinion.
If you own the turntable you also should own the manual!
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I was very satisfied with the service manual I ordered and downloaded. I will definitely buy again from this seller.
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Great product. Recieved it fast...exactly as advertised.
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Manuals were delivered promptly and were correct as advertised. No issues with the download link which was provided promptly after everything was processed. Very pleasant experience
AV-28BK5ECB AV-28BK5ECS CHASSIS DESCRIPTION
[Digital Scan Operation]
100Hz Digital Scan Converter circuit 100Hz converter circuit consists of the following ICs. - TC90A36F, IC7201 Field Progressive Converter - MSM518221A, IC7202, IC7203 Video Memory - TLC2932I, IC7204, IC7205 PLL (Phase Locked Loop) - MC74HC04AFP, IC7341 invertor The Y-signal output from IC101 is sent to pin 85 of IC7201<TC90A36F>, field progressive converter, after controlling the amplitude level and band-pass limiting by the circuit consist of Q7301, Q7302, Q7303, Q7304 and 8MHz LPF. The U/V-signal are also controlling the amplitude level and band-pass limiting by the circuit consist of Q7311, Q7312, Q7313, Q7314, Q7321, Q7322, Q7323, Q7324 and 4MHz LPF respectively. The U-signal is sent to pin 90 of IC7201and the V-signal is sent to pin 92 of IC7201. The HD signal is sent to pin 63 of IC7201 with positive polarity through IC7341 for shaping the waveform. The VD-signal is sent to pin68 of IC7201 with negative polarity through IC7341. The Y-signal input to IC7201 is converted from A to D in 8bit and output from pins 31 to 50 of IC7201 to pins 1 to 4 and 24 to 27 of IC7203<MSM51822A>, video memory, for writing. Digital scan circuit
LPF Q7351-Q7354 LPF Q7361-Q7364 LPF Q7371-Q7374
IC7203 IC7202
6 9 | 31
2Y 2U 2V
98
100
IC7201 DOUBLE SCAN CONVERTER <TC90A36F>
31 | 50
92
LPF Q7321-Q7324 LPF Q7311-Q7314 LPF Q7301-Q7304
V U
90
Video Memory
85 53 59 63 68 70 71
Y
IC7204 PLL <READ>
9 4
IC7341 Inverter
13 12 11 10
2HD 2VD VD HD
IC7205 PLL <WRITE>
5 4
6 4
5 1
Fig.-6
6
No. 51758
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