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This is a very good quality print (scan) of the original SONY service manual. The original from Sony is on very thin paper. Nevertheless it is very clear and sharp and excellent readable. I'm very satisfied to have now this rare document. I've looking for it many years (infrequent). It contains very detailed circuit diagrams, exploded views, part lists, PCB view with good readable connection lines. Very recommended.
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A complete manual with all the needed details of calibrations and service instructions about the radio receiver.
A big deal.
Many thanks !
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Fast delivery and good quality copy. To be recommended
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Excellent product, very clear print. Detailed circuit and assembly diagrams - this enabled me to repair my CD player with confidence. I highly recommend this site.
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Fast access, 100% correct and complete service manual
GRUNDIG Service
CIRFLEXX UMS 4201 SPCD
Adjustment Procedures
Tuner
Test equipment: Sweep / Signal Generator, Distortion Meter, Oscilloscope, Digital Voltmeter Note: The frontend is a completely preadjusted module. Only the IF filter must be adjusted to the IF amplifier (Adjustment 4). The values of the tuning voltages are as follows: 87.5MHz = typ. 1,6V; 108MHz = typ. 8.0V.
Adjustment 1. AM IF
Preparation AM; Sweep Generator 450kHz to AM Aerial Input; Ue > 60dBµV; Oscilloscope to Testpoint TP5, IC502(-19).
Adjustment Procedure Adjust with T503 for Maximum.
2. AM Oscillator
AM, 1620kHz; Digital Voltmeter to Testpoint TP3. AM; Couple Signal Generator via Loop Antennas; Ue > 50dBµV; fmod = 1kHz; Oscilloscope to Loudspeaker Output. FM, 98.0MHz Signal Generator to FM Aerial Input; Ue = 20dBµV; fmod = 1kHz; Deviation = 75kHz; Distortion Meter to Loudspeaker Outputs. FM; Signal Generator to FM Aerial Input; Ue = 50dBµV; fmod = 19kHz; Oscilloscope to Loudspeaker Outputs.
Adjust with T501 for 8.0V ± 0.2V.
3. AM Band Pass
Adjust alternating with L502 at 558kHz and with VC501 at 1440kHz for AF Maximum.
4. FM IF
Adjust with IF Filter A (under the cover) for Distortion Minimum.
5. 19kHz Filter
Adjust with LPF501 (left channel) and with LPF502 (right channel) for AF Minimum.
CD
Test equipment: Digital Voltmeter
Adjustment DC Offset
Preparation Mode CD; Digital Voltmeter between TP9 and TP10.
Adjustment Procedure Adjust with VR701 for 0V ± 0.1V.
2-2
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