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Probably it never existed a 1081 official service manual from Commodore, it's look more like a NAPCEC service manual & diagrams compilation of the 1084 series and his variants, like the nap6523, 8cm505, 1084S, 1084P and obviously the 1081. It's more complete than other scans and the quality of the scans also are far superior. It has two circuit diagrams variants of the 1081, mono and stereo versions. It doesn't include a diagram for the Philips CM8500 or CM8501, they look like the 1081 but they are slightly different.
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Rapid, clear well done as all the scheme I downloaded from this site. Great job very functional and very useful
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Great copy of the manual, has all information required for servicing,
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I work at an authorized service center and I can tell if a manual is as it should be. This one is. It may be a scan, but a very good one at that. The interesting part for me was the curcuit diagram which was scanned at high quality, making it as good as the original. I will definitely be back as a customer. I need not say this, but I will: the price was the best. Thank you owner-manuals.com .
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really a very good manual even sometimes the quality is no so good as before still very readible and very very useful!
Pin No. 32 33
Pin Name LF I LF O
IJo I
Description Input terminal by capacity combination of RF summing amplifier. Output terminal of RF summing amplifier. Check point of Eye pattern. Anti-reverse input terminal for RF summing amplifier.
0
I
34
I
LF M
I
I
The gain of RF amplifier is decided by the connection resistance between RF-M and RFO terminals.
35 36 37
38,39
LIWC LD PD PD1, PD2
I o I
This is a pin where the selection time constant is externally connected to control the RF level. APC amplifier output terminal. APC amplifier input terminal. RFI-V amplifier inverted input pin.
I
I I I Theseare connected to the A+C and B+D pins of the optical pickup, receiving by pins
currents input.
1/0
40
FE(NC)
Bias adjustment pin of the focus error amplifier. (Not used.) F and EIV amplifier inverted input pins.
41,42
F, E
I
These pins are connected to the F and E pins of the optical pickup, receiving by current I input. Gain adjustment pin of the I-V amplifier E. (When not in use of BAL automatic adjustment).
I
I
EI(NC) �
I
43
GND connection pin. Output terminal for tracking-error amplifier. Output E-F signal. BAL adjustment comparator input pin. (Input through LPF from TEO) 47 48 49
50 51
I
TEI ATSC
I I
I I
I I
Input terminal fortracking error. Whdow-comparator input terminal for detecting ATSC. Inputterminalfortracking-zerocrosscomparator. Capacitor connection pin forthetimc constant used when there is defect. Voltage center of DC voltage reduced to half between VCC and VEE. Input terminal for focus-zero cross comparator.
I
I
I
Tzc
TDFCT
Vc
III
I I
o
I
52
F�Zc
I
�21�
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