Pioneer PR-8210-A Service Manual page 70

PR-8210-A
Problem Cause
: Disc fails to rotate when PLAY
button is pressed
|
i
i
|
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| Disc stops after rotating for
| only a few seconds.
|
| SPDL servo lock failure
!
Defective SPDL motor.
No SPDL RUN signal
FOCS LOCK signal not applied
to CONT after focussing.
Defective CONT
Defective SPDL servo circuit
¦ Defective SPDL motor.
Defective FG adjustment
Defective FG adjustment
! Defective REAM or VDEM
; Defective UM5003
Defective UM3001
Defective SPDL offset
adjustment
Check Point
— ‫س‬ ‫ڪ ک‬ ‫ک ک‬ P a ‫‏‬
Check for generation of motor drive voltage (about
*20V) at VSOP (N8-6) after focussing, Failure to
rotate when this voltage is applied to the SPD L
motor indicates a defective SPDL motor.
Does FOCS LOCK signal appear at УЗОР (N76)?
Is FOCS LOCK signa! applied to CONT (N13-1}?
1s SPOL RUN signal applied to VSOP (N9-2)?
Does SPDL RUN signal appear at CONT (М14-8)2
Failure to generate the drive voltage at VSOP (N8-6)
when the SPDL RUN signal is applied to UM3002
(24) indicates a defective SPDL servo circuit.
VSOP adjustment, step 6.
VSOP adjustment, step 6.
Check presence of RF SENS signal at UM3002(261.
Check presence of COMP SYNC signal at UM5003
(13).
REF Н (15.734kHz) should appear at ТРЗ.
Check that PB H is generated at TP2.
Check for appearance of the PFC output at UM3001
(10) (oscilloscope V rate).
i УЗОР adjustment, step 21.
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