Sanyo CP10 - Troubleshooting Flowcharts; Diagnostic Procedures for Common Issues

TROUBLE SHOOTING FLOW CHARTS
Check AC power cord
Load a disc { not scratched or soiled ) and close the lid
POWER
switch
“ON”
==
aveseese
ees
The
LCD
does
not
display,
and
the
disc
does
not
rotate
in
this
condition.
NO
PLAY
key
“ON”
ls
1C301
pin
3
output
voltage
normal?
(
+5V
)
Check
+V
IN
DC
POWER
supply
circuit
NO NO F in S609 (CLOSE switch) or $601 (POWER
Does LCD display? Is 10501 pin 35 “LOW? aulty contact in S609 switch) or S601 (
switch)
YES
Disc starts rotatin ne | # DC POWER BLOCK +5,2V? aad Check POWER ON/OFF voltage
: SougtP ache Check 1C501 pin 28 (P-CONTL)
YES YES
NO j
*Check operation of sled motor in the service mode Check soldering of 1C401 pins 1 to 4
NO YES itted? YES
Focus
search
takes
place
and
focus
servo
goes
“ON”
*Check
focus
search
operation
in
the
service
mode
iB
psi
(Do
not
look
at
laser
beam
for
along
YES
Is FOK (1C501 pin 21) “HIGH’? Check soldering of |C501 pin 21
Player stops after several seconds
Spindle motor runs away
Sled motor runs away
Readjust focus offset in the service mode
NO NO
1s sound heard when 1st tune is played? Does tracking servo go “ON” and appear RF waves? Readjust tracking balance in the service mode
YES
Servo
is
normal
but
no
sound
appears,
or
sound
distorted
Check soldering of 1C401, 402, and 701 Is PLL VCO waveform normal? (Ils GFS “‘HIGH’?) Readjust PLL VCO
2
(eo)
YES
Check bus line of 1C401 and 501 sub code. Check soldering of |C401
NO NO
Is skip search operation normal? Is focus tracking gain normal? Readjust each gain
YES
End of operation check Check mechanism