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I was very glad recieving the service manal from You. Additionaly very fast. Extremaly nice servicing. Thanks very mach! Now my GX-220 working better, than it was made. Alexander from Moscow, Russia/
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Sweet! I won the item on eBay and couldn't adjust the geometry or even keep a steady picure. This guide has the full schematics (not available anywhere else as far as I could tell), and was a bargain for the wealth of knowledge it contains. I hooked it up to my testing equipment, tweaked a few potentiometers and got it playing videogames in no time. Thanks!
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It was just what I need to fix my old BMW's CD player. Very convenient also. Thank you.
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Great Manual! It contains all the wiring schematics and mechanical exploded views that are essential for service and repair. I was surprised I even found this for such an old machine. Only wish I knew of this site many years ago.
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Great manual very clear copied. You are making an incredible job. I appreciate a lot the rapidity and your efficiency. Thanks a lot
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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