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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
KDC-C471FM/C521FM
ADJUSTMENT
� L.P.S. initial position adjustment procedure
1. Connect the changer to the HEAD UNIT (H/U). 2. While holding the magazine eject button of the changer, press the reset button of the H/U. 3. After about 3 seconds, release the magazine eject button. 4. Press the SRC button of the H/U to enter the CD-CH mode, and the H/U's display section indicates �E-88�. 5. Move the mechanism deck to around the 1st stage by pressing the DISC- or DISC+ button. 6. Insert the adjustment tool (W05-0635-00) into the tool hole on the changer mechanism. 7. Then press the DISC+ button to move the mechanism deck until the mechanism's slider hits the adjustment tool. 8. When the motor locks (stops), press the REPEAT key of the H/U. When the REPEAT key is pressed, the mechanism moves automatically to the 1st stage and the initial position adjustment completes. (The data is written in the EEPROM at this time.)
W05-0635-00
� Caution : Note on IC8 (EEPROM)
Be sure to use the W05-0869-00 when replacing the EEPROM. IC8 stores the digital servo data of the pickup servo. Therefore, if the EEPROM does not store servo data, ERROR76 (E-76) will indicate the H/U�s display section at the moment CD is played.
Instrument : SSG, OSC (5MHz), AC VOLTMETER, PWR SUPPLY, H/UNIT, CD-CH
RECEIVER (MODULATOR) FREQ ALIGNMENT POINTS
No.
ITEM
INPUT SETTINGS
OUTPUT SETTINGS
ALIGN FOR
FIG.
Connect a 1 L/R Balance Adj. CD-CH cignal off (Tr No.29 or Pause) Oscilloscope to Q301 Base. Difference between Moduration 2 level Adj. 1. Ref.FM 1kHz 80dBµV Stereo, CD-CH Tr No.1 2. D.Cont Off MOD Lv:2 Connect a AC voltmeter to Receiver PreOut 88.3MHz VR302 FM and a CD-CH level is adjusted to (-0.5±1.0dB). * After Adj. The glue is applied to VR301, VR302. 88.3MHz VR301 Min Level (a)
(Scope Setting Condition for L/R BAL. Adj.) 1. VOLTAGE RANGE : 5mV 2. TIME/DIV : 50µs
Adjusted to be min level point
(Before Adj.) Fig. (a)
(After Adj.)
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