JVC CH-X1500 Service Manual page 23

3.2 Troubleshooting
3.2.1 Servicing procedures for CH-X1500 error displays
Error display
E1: Eject error
The magazine cannot be ejected until S601 (magazine switch) turns off.
Can the magazine be ejected? YES
1 The magazine switch (S601) does not turn off even though the magazine is completely ejected.
2 Check that the magazine is not engaged with the mechanism assembly.
E2: Position The lifter does not move up and down when exchanging or ejecting discs.
motor error After resetting, check whether or not the lifter moves.YES
3 If the lifter exceeds the required disc position, check the lift position input. (IC601 pin 76)
If the lifter does not reach the required disc position, check the mechanism (mainly the lifter
elevation mechanism)
4 Check that voltage is present at the motor terminal.
If voltage is present, check the lifter elevation mechanism. If voltage is not present, separate the
motor from the circuit and check again whether or not voltage is present.
If voltage is present, next check that the armature resistance of the position motor (resistance
between motor terminals) is approx. 12
If the resistance is excessively low (1 - 2
E3: Tray motor Trays cannot be opened or closed when exchanging or ejecting discs.
error Does the tray move when changing or ejecting discs?YES
5 Check that TRAY OUT SW (S602) and TRAY IN SW (S603) function correctly.
6 Check that the drive voltage is applied to the motor terminal.
If the voltage is present, check the tray mechanism.
If the voltage is not present, separate the motor from the circuit and check again whether or
not the voltage is present.
E4: Pick returning Does the feed (pickup unit) return to the inner area of the disc when ejecting?
error YES
7 Check the rest switch.
8 If the feed gear is rotated, check the feed transfer mechanism
9 If the feed gear is not rotated, check the motor driver and the pattern.
Other errors occurring in the receiver or controller.
E8: Connection When selecting the CD Changer mode using function keys, etc., the unit does not enter the CD
error changer mode, or the E8 error display appears. This signifies trouble relating to communications.
a Check the connection cables between the CD changer and the receiver (CD changer controller).
b Check the CD changer power cord and the fuse (including F901 on the PC board).
c Check IC651 and its peripheral circuits.
The E1 ~ E8 error displays described above may appear as E-1 ~ E-8, 1E1 ~1E8, R-1 ~ R-8, or RST1 ~ RST8,
depending on the product.
Servicing procedure
S602 & IC601 pin (46)
When opening
When closing
7, NO 8, 9
1, NO 2
3, NO
.
), the motor is defective.
5, NO
S603 & IC601 pin (45)
H
L
4
6
L
H
CH-X1500
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