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There are currently no product reviews.
 ;
Great product, helped me to restore vintage walkman cassette.
Just some pictures could be little bit more sharp and contrast
Thank you
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I love older radio's and the service manuals that are sometimes hard to find. Was able to find a manual quite easily on this site.
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Thank you for your shop manual! Your help was very useful - the device is repaired! Once again - Thank you! I wish you a successful business! Edward (Russia).
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It was a great experience,instead of purchasing a new Stereo Amplifier ,in just minutes i repaired my old one and that was thaks to the manual I have purchased from you.
Thanks again.
Samuel Alter
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Das ging ja sehr unkompliziert hat bestens geklappt und die Quallität ist auch noch gut.
Vielen Dank dafür.
RR 430 CD
Abgleichvorschriften / Adjustment Procedures
2. Tuner
Measuring instruments: Signal generator, sweep generator, oscilloscope. Function switch: Radio Adjustment 1. AM IF Preparations Couple in a sweep signal of 455kHz to L504 (ferrite aerial) via a loop aerial. Oscilloscope to testpoint TP 5 (IC501 Pin 7). Band switch: MW MW fu 515kHz, fo 1630kHz Couple in a standard signal to L504 (ferrite aerial) via a loop aerial, (fmod = 1kHz, m = 30%, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: MW MW 558kHz, MW 1440kHz Couple in a standard signal to L504 (ferrite aerial) via a loop aerial, (fmod = 1kHz, m = 30%, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: MW LW fu 142kHz, fo 292kHz Couple in a standard signal to L505 (ferrite aerial) via a loop aerial, (fmod = 1kHz, m = 30%, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: LW LW 153kHz, LW 261kHz Couple in a standard signal to L505 (ferrite aerial) via a loop aerial, (fmod = 1kHz, m = 30%, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: LW FM fu 87.35MHz, fo 108,25MHz Couple in a standard signal via a 10nF capacitor to testpoint TP 1 / TP 2 (GND) (fmod = 1kHz, �f = 22.5kHz, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: FM FM 88MHz, FM 106MHz Couple in a standard signal via a 10nF capacitor to testpoint TP 1 / TP 2 (GND) (fmod = 1kHz, �f = 22.5kHz, Ua as low as possible so that the signal is just visible). Oscilloscope to the headphone socket. Band switch: FM Adjustment Process Adjust to maximum with T501.
2. MW Oscillator
At tuning minimum (515kHz) adjust with T502 and at tuning maximum (1630kHz) adjust with VC501-C to maximum output. Repeat this adjustment alternately.
3. MW Aerial bandpass
At 558kHz adjust to maximum with L504 (MW aerial coil, move). At 1440kHz adjust to maximum with VC501-D. Repeat this adjustment alternately.
4. LW Oscillator
At tuning maximum (292kHz) adjust with TC502 to maximum output.
5. LW Aerial bandpass
At 153kHz adjust to maximum with L505 (LW aerial coil, move). At 261kHz adjust to maximum with TC501. Repeat this adjustment alternately.
7. FM Oscillator
At tuning minimum (87,35MHz) adjust with L502 and at tuning maximum (108,25MHz) adjust with VC501-A to maximum output. Repeat this adjustment alternately.
8. FM Aerial bandpass
At 88MHz adjust to maximum with L503 (bend). At 106MHz adjust to maximum with VC501-B. Repeat this adjustment alternately.
L504
L505
VC501
B A
C D
TP 1 TP 2
TC501 L502 L503 T501 TC502 T502
TP 5
GRUNDIG Service
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