CD-C471
TROUBLESHOOTING (CD SECTION)
When the CD does not function
When the CD section does not operate When the objective lens of the optical pickup is
section may not
the objective
check the playback
this section does not operate even after the above step is
the following items.
Remove the cabinet and follow the troubleshooting instructions.
and/or no
Of Contents) may be caused by build up of dust other foreign matter on the laser pickup lens.
Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned below.”
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
Is
5 till OV down pulse (approx. 300 ms) input
Check the SW3 and the wiring from the
pin 54 to the
into the
pin 54 when the turntable is rotating?
I
Yes
Is there following voltage input on the
pin 54 in the
specific state?
When the CD mechanism is moved up: OV
In other states:
Check the SW2 MECHA UP SW and the wiring from the
No
pin 21 to the SW2 MECHA UP SW.
Yes
Check
pin26
and Q93 and the periphery.
Is there following voltage input on the
pin 54 in the
specific state?
When the CD mechanism is moved up: OV
In other states:
Check the SW2 MECHA UP SW and the wiring from the
pin 54 to the SW2 MECHA UP SW.
Yes
Is output from the
pin 26 during SEC when the disc skip
switch is pressed?
Yes
output from the
emitter during operation stated
above?
Yes
Check the wiring of
pin 26 and Q93 BASE.
OK
defective.
Check
and the periphery.
Check turntable motor and turntable mechanism.
40
Содержание CD-C471 W
Страница 16: ... I I Ill I i c r __ __ I Figure 16 BLOCK DIAGRAM 2 3 16 ...
Страница 17: ...CD C471 W w UTER lC56115621563 N5M4558L lC562 1 2 Figure 17 BLOCK DIAGRAM 3 3 17 ...
Страница 20: ...CD C471 W l NOTES ON SCHEMATIC DIAGRAM can be found on page 14 1 2 3 4 5 6 Figure 20 SCHEMATIC DIAGRAM 3 13 20 ...
Страница 30: ...CD C471 W CD NORMAL REC OTHERCD NORMAL PLAY I 2 I 3 I 4 5 6 Figure 30 SCHEMATIC DIAGRAM 13 l 3 30 ...
Страница 31: ...CD C471 W 1 SWICH PWB A3 1 DISPLAY PWB A2 1 7 8 9 10 11 12 I Figure 31 WIRING SIDE OF P W BOARD l E 3 1 ...
Страница 36: ... POWER PWB B 1 MAII IUPWB P33 7 A 1 2 3 4 5 6 Figure 36 WIRING SIDE OF P W BOARD 6 8 36 ...
Страница 54: ...CD C471 W MEMO 54 ...
Страница 66: ...CD C471 W 620 12 614x2 hy2 x b16 226 L 235 234 609x2 611 236 SOLM2 1 2 3 4 5 6 CABINET EXPLODED VIEW 2 2 ll ...
Страница 69: ...CD C471 W WOOFER SPI L CH SP2 R CH SPI 2 904 1 I 2 I 3 I 4 I 5 I 6 SPEAKER EXPLODED VIEW 2 2 14 ...
Страница 70: ......
Страница 71: ...CD C471 W MEMO ...