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OK?..manual is complet and helpfull... for repairing such a old and rare boombox like JVC PCM it is necessary...
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Super Anleitung. Ordentliche Auflösung. Das ganze noch in Deutsch wäre zu schön. Alle Datenblätter sind sauber Kopiert und alle Leitungswege sind sauber ausgeführt
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Thanks God for the internet and thanks for the service like this - proffessional solution on time.
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About the service it's very fast and reliable. About the manual the quality is high enough to read even the tiniest details on the wiring diagrams so you can't ask much more than that, let it alone for a manual of a product from 20 years ago. Thank you, very satisfied.
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The downloaded quality was as good as the orignial
WCS-880
Adjustment Location:
MIC jack (J1)
RX SECTION
1. Consumption Current Check Setting:
regulated dc power supply battery terminal 3 mA Set
� TX BASE BOARD � (Component Side)
1t2t3
SW51
[RF CHANNEL]
CT2 TX OSC (12.8MHz) RV1 RV2 RV3 Adjustment TX Modulation Sensitivity Adjustment
+ �
RV51 TX Output Level Adjustment
Procedure:
battery terminal #
�VCO BOARD �
1. Connect a regulated dc power supply (1.5 V) and ampere meter. 2. Set the [RF CHANNEL] switch (SW1) to [1]. 3. Check that the value of ampere meter satisfy specified value. Specified value: 50 mA to 65 mA 2. RX Frequency Adjustment Setting:
CT1 VCO Voltage Adjustment shield case
digital voltmeter +
lead wire antenna (ANT1)
� TX BASE BOARD � (Conductor Side)
FM RF SSG
� Foot of VCO lead wire board shield antenna (ANT1) case
to TP51 RX BASE board
Q50
1/4 λ sleeve antenna
TP53 IC51
Carrier frequency: 863.4 MHz Modulation: 1 kHz, ± 20 kHz deviation Output level: � 60 dBm oscilloscope (DC range)
TP58
REC out plug (P1)
CP54
Procedure: 1. Connect the 1/4 λ sleeve antenna to a SSG, and put the antenna by the lead wire antenna (ANT2). 2.
Foot of VCO board shield case
3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14.
Connect a digital voltmeter to the TP51 on RX BASE board and the foot of FE board shield case. Connect REC out plug (P1) to an oscilloscope. Set the [RF CHANNEL] switch (SW1) to [1]. Adjust CT1 on the RX BASE board so that the value of digital voltmeter becomes 1.4 V. Confirm that the waveform of oscilloscope is sine wave. Change the carrier frequency of SSG to 864.2 MHz. Change the [RF CHANNEL] switch (SW1) to [2]. Adjust CT2 on the RX BASE board so that the value of digital voltmeter becomes 1.4 V. Confirm that the waveform of oscilloscope is sine wave. Change the carrier frequency of SSG to 864.6 MHz. Change the [RF CHANNEL] switch (SW1) to [3]. Adjust CT3 on the RX BASE board so that the value of digital voltmeter becomes 1.4 V. Confirm that the waveform of oscilloscope is sine wave.
Adjustment Location: RX BASE Board (See page 9)
8
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