Philips CDR770 - 5.2 Faultfinding Trees; 5.2.1 CDR-Module

Service modes, repair tips and faultfinding trees
GB 18 CDR 3rd gen.5.
FE : number of errors
detected during
finalise modes on
digits 10 and 11
If started up with a disc other than a
CDRW disc the display shows : ”WRONG DISC”,
if no disc is inserted display : “NO DISC”.
– End of test
To exit the Burn In mode, power off the player.
5.2 Faultfinding Trees
The faultfinding trees and repair suggestions like the power
supply voltages for proper functioning of the mainboard are
indicated here.
5.2.1 CDR-Module
Figure 5-6
Figure 5-7
NO DISC LOADED
SWITCH ON POWER
PRESS
<OPEN/CLOSE>
SEE CD-DA DISC
FAULT FINDING
SEE CD-R DISC
FAULT FINDING
SEE CD-RW DISC
FAULT FINDING
INSERT DISC
PRESS <OPEN/CLOSE>
DISPLAY?
DISPLAY:
"INSERT DISC"
CD-DA DISC
LOADED?
CHECK:
• POWER SUPPLY (SEE FAULT FINDING GUIDE PSU)
⇒
WIRING
⇒
ON/OFF SWITCH
⇒
FUSES
⇒
VOLTAGES
• DISPLAY (SEE FAULT FINDING GUIDE DISPLAY BOARD)
⇒
WIRING
⇒
CONTROL SIGNALS
⇒
CLOCK SIGNAL 8MHz
⇒
SUPPLY VOLTAGES
⇒
ELECTRICAL SERVICE DIAGNOSTICS:
DISPLAY TEST, KEYBOARD TEST
• POWER SUPPLY VOLTAGES
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
CHECK:
• MECHANICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF ERROR OCCURS
TRAY?
CD-R DISC
LOADED?
NONO
NO
NO
NO
YES
YESYES
YES
YES
CD-RW DISC
LOADED?
YES
STBY LED?
PRESS <DISPLAY>
• MAINS, MAINS CABLE
CHECK:
STANDBY LED
⇒
NO
YES
⇒
KEYBOARD
• WIRING
• DISPLAY BOARD (SEE FAULT FINDING GUIDE DISPLAY BOARD)
⇒
WIRING
⇒
CONTROL SIGNALS
⇒
CLOCK SIGNAL 8MHz
⇒
SUPPLY VOLTAGES
⇒
ELECTRICAL SERVICE DIAGNOSTICS:
DISPLAY TEST, KEYBOARD TEST
⇒
KEYBOARD
CL 96532076_016.eps
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PLAY BACK OF CD-DA
DISCS OK
PRESS <PLAY>
CD-DA DISC LOADED
CHECK:
CHECK:
•
PLAY AUDIO SIGNALS DISC TRACK 15:
SIGNAL OF 5.4 VPP ON PINS 1 AND 3 OF CONN.
1000
KILL VOLTAGE (pin 7 conn. 1000):
-8V DURING PLAY
NO
NO
NO
NO
NO
YES
YES
YES
YES
HEADPHONE?
DIGITAL
YES
DISTORTION?
DISPLAY:
“CD” &
T.O.C. INFO?
YES
DISC
DETECTION &
READING?
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
CHECK:
• DISC: DIRT, SCRATCHES, DAMAGED...
NO
• POWER SUPPLY VOLTAGES
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
CHECK:
• WIRING
I/O BOARD
⇒
FLEX CONNECTION
⇒
⇒
⇒
+5V (pin 8 conn. 1000)
KILL TRANSISTORS 7006,7007,7008, 7009
AUDIO
ANALOG
OUT?
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
•
AUDIO CONNECTIONS & CABLES
CHECK:
•
I/O BOARD
⇒
FLEX CONNECTION
⇒
+5V (pin 8 conn. 1000)
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
•
AUDIO CONNECTIONS & CABLES
⇒
•
WIRING OF HEADPHONE/IR BOARD
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
CHECK:
DIGITAL OUT TRANSFORMER 5450, IC7005
•
AUDIO CONNECTIONS & CABLES
•
I/O BOARD
⇒
FLEX CONNECTION
⇒
⇒
+5V (pin 8 conn. 1000)
• ELECTRICAL SERVICE DIAGNOSTICS:
REPLACE CDR MODULE IF
"DERRn"
OR "BERRn" ERROR OCCURS
AUDIO
OUT?
CL 96532076_017.eps
290799