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Incredibly clear!!!! Well done, complete and wonderful. It could not better than this!!!!
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Thank You for fast delivery for the sheme.
Everything allright.
Thanks & best regards Franz
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again you did a very good job. It was fast too. Photocopy are really readable and clear
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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
8. SERVICE PROCEDURE
MICRO-COMPUTER
To check the microcomputer firmware version, press 6.1 CH IN button and SLEEP button simultaneously while
2-2. AM(MW) Alignment Output of signal generator should not be greater than necessary to obtain an optimum output reading. Signal generator modulation ................................................................. 30% Signal frequency ................................................................................ 400Hz Modulation frequency ........................................... 603, 999, 1404kHz (/A/K/N) Modulation frequency ............................................ 600, 1000, 1400kHz (/U) Switch ........................................................... press the BAND Button to AM
power is on. The version number is shown on the main display of the unit. Ex. V 020716 01
TUNER 1. Requried Equipments
- AM Standard Signal Generator (AM SSG) - Oscilloscope - AC Voltmeter - FM Standard Signal Generator (FM SSG) - Stereo Modulator - Audio Generator - Distortion Meter - DC Voltmeter - Frequency Counter
Step 1
Subject Tunning voltage
Signal generator setting 522kHz (/A/K/N) 520kHz (/U) 603kHz (/A/K/N) 600kHz (/U)
Set frequency setting 522kHz (/A/K/N) 520kHz (/U) 603kHz (/A/K/N) 600kHz (/U) 603kHz (/A/K/N) 600kHz (/U) 999kHz (/A/K/N) 1000kHz (/U)
Equipment connection DC voltmeter
Adjustment point RF BLOCK OSC coil
Adjust for 522 kHz : 1.0 ~ 1.3V 1611 kHz : 7.0 ~ 8.5V
2
Note : Disconnect external FM antenna prior to alignment.
IF Tracking
AC voltmeter oscilloscope tape monitor L/R AC voltmeter oscilloscope tape monitor L/R AC voltmeter oscilloscope tape monitor L/R
IF BLOCK Coil KSNT-111I
Maximize audio output
2. Alignment
2-1. Alignment Test Points
3
RF Tracking
603kHz (/A/K/N) 600kHz (/U)
RF BLOCK ANT coil
Maximize audio output Repeat LOW, HIGH frequency
4
Seek level
999kHz (/A/K/N) 1000kHz (/U)
SVR 03
Tuned on point
2-3. LW Alignment (/A/N) Output of signal generator should not be greater than necessary to obtain an optimum output reading. Signal generator modulation ................................................................. 30% Signal frequency ................................................................................ 400Hz Modulation frequency ....................................................... 162, 207, 252kHz Switch ........................................................... press the BAND Button to LW
Step 1
Subject Tunning voltage
Signal generator setting 152kHz
Set frequency setting 152kHz
Equipment connection DC voltmeter
Adjustment point RF BLOCK OSC coil
Adjust for 522 kHz : 1.5 ~ 2.3V 1611 kHz : 6.0 ~ 7.5V
2
RF Tracking
162kHz
162kHz
AC voltmeter oscilloscope tape monitor L/R AC voltmeter oscilloscope tape monitor L/R
RF BLOCK ANT coil
Maximize audio output Repeat LOW, HIGH frequency
3
Seek level
207kHz
207kHz
Tuned on point
59
60
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