Harman Kardon CDR 20 (serv.man13) Service Manual ▷ View online
YES
-17-
NO
Go to “RF output is abnormal”
Spindle control is abnormal 2
(CD-ROM Disc)
Is there
RRF signal input?
(IC413 pin 3)
YES
NO
Replace the IC413(EL2245).
Is there
RFDC signal input?
(IC401 pin 85)
YES
NO
Go to “Track servo is unstable”
Does Tracking
Servo operate normally?
YES
Go to “Disc recognition is abnormal”
NO
NO
Go to “RF output is abnormal”
Spindle control is abnormal 3
Is there WBLIN signal
input? (IC201 pin 132)
Is there ATFM signal
output? (IC401 pin 25)
YES
Replace the IC401(CXA2551R).
NO
Replace the IC201(OTI-9790).
Is there DMO signal
output? (IC202 pin 2)
YES
Go to “Spindle operating is
abnormal”
abnormal”
NO
YES
-18-
YES
NO
Go to “RF output is abnormal”
Disc recognition is abnormal
Is there
CDR/RW signal input
normally?(IC601 pin 33)
Is there
RECD1, RECD2 signal
output normally? (IC401 pin
48,49)
YES
Replace IC701 (MICOM)
Go to “Track Servo is unstable”
NO
NO
Go to “Laser is abnormal”
•Check the PICK UP FFC.
•Replace the PICK UP
•Replace the PICK UP
RF output is abnormal
Is there
PICK UP(A,B,C,D) output
normally? (CN401 pin 8,9,
14,15)
Is RRF signal
output normal?(IC401 pin 86)
•First Recognition try : Over 1.7 Vpp
•Second Recognition try :
Over 0.5 Vpp
YES
NO
•Check the connection between
CN401 and IC401.
•Replace the IC401(CXA2551R).
OK
YES
-19-
NO
Check the IC401(CXA2551R).
Focus Servo is unstable
Is FE signal
output normal in Focusing
Up/Down? (IC401
pin 56)
YES
Go to “RF output is abnormal”
NO
Replace the IC201(OTI-9790).
Go to “Focus Actuator operating
is abnormal”
is abnormal”
NO
NO
•Check the PICK UP FFC.
•Replace the PICK UP.
•Replace the PICK UP.
Track Servo is unstable
Is TE signal
output normal in Focusing ON
and Tracking OFF?
(IC401 pin57)
Is PICK UP(E,F,G,H)
output normal?(CN401
pin 16,7,13,10)
YES
Check the IC401(CXA2551R).
Go to “RF output is abnormal”
NO
Check the IC403(NJM3403)
Is TE signal
input normal in Focusing
ON and Tracking OFF?
(IC201 pin198)
YES
NO
Replace the IC201(OTI-9790).
Is
there TAO signal
output in Tracking ON?
(IC201 pin 208)
YES
Check the Driver IC(IC501) and
P/U referring to “Focus Asctatr
operating is abnormal.”
P/U referring to “Focus Asctatr
operating is abnormal.”
Is FAQ signal
output normal in Focusing
Up/Down? (IC201
pin 207)
YES
YES
F
G
Normal
YES
NO
NO
NO
NO
YES
-20-
NO
YES
YES
Laser is unstable
Is EEPROM Data valid?
Execute “B.Calibration Data” of
“How to use Test Tool(Dragon)
“How to use Test Tool(Dragon)
Execute “C.LD Power setup” of
“How to use Test Tol(Dragon)”
“How to use Test Tol(Dragon)”
OK?
OFF LEVEL NG?
VRDC NG?
VWDC1 NG
Execute “D.LD Inspection” of
“How to use Test Tol(Dragon)”
“How to use Test Tol(Dragon)”
E
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