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Extracted text from panasonic sa pm 54 e service manual (Ocr-read)
Page 1
1 Troubleshooting Flowchart (CD Section Circuit)
CD can not
playback
Disc
rotating
TOC
reading
IC7001
Pin45 TP50
IC7001
Pin24 (TRP)
R7331 (22K)
& R7323 (3.3K)
Not connect or cut Display
shows PLAY
IC7001
Pin71, 63, 64
IC7001
Pin52, 56, 59
IC7001
NG
IC7002
NG IC7001
NGIC7001
NG
Check
main unit NO
NO
NO YES
YES
NO outputOutput OKOK
OK Output NG Playing time appear on the display screen.Can not access
IVPP output level
Pin71: BLKCLK
Pin63: LRCK
Pin64: SR DATA
NG
2
SA-PM54GN / SA-PM54E / SA-PM54EG / SA-PM54GT / SA-PM54GD
Page 2
Take off clamper
& test disc
One time, after moving to inner,
moves 2~3mm to outer track Laser pickup
movement
Laser move up
& down
Laser diode
blinking
R7601 voltage
at terminalsR7601 voltage
at terminals
Test disc
IC7002
Pin11, 12IC7002
Pin13, 14 IC7002
Pin15, 16 output
IC7001
Pin25 (FOP)CN7002
Pin2 (RESET_SW)CN7002
Pin2 (RESET_SW)
IC7001
Pin23 (TRV)
Spindle motor
NG IC7002
NGIC7001
NG
IC7001
NG
IC7002
NG IC7002
NGTraverse unit
NG Laser pick-up NG
(Laser diode NG)
Q7601 NG or
Laser pick-up NGLaser pickup NGLaser pick-up NGLaser pick-up
position
Inner track limit
switch (S7201)
NG OpenInner track limit
switch (S7201)
Short
Q7601
voltage Change all non
CD functions to CD
Change all non
CD functions to CDNot moving
Outer track, or middle
Inner track NO
Above 0.2V
Above 0.4V
Above 0.6V Below 0.2VBelow 0.4V
Below 0.6V YES
YESNONGL H
NGNG
OK
OKOK
OK NG NG
3
SA-PM54GN / SA-PM54E / SA-PM54EG / SA-PM54GT / SA-PM54G D
FLE07 06
