Philips CDR930 - Page 20

Service modes, repair tips and faultfinding trees
GB 20 CDR 3rd gen.5.
Figure 5-11
+5V (+/-5%) conn. 1500 pin 5 and 6
+12V (+/-10%) conn. 1500 pin 10
- 8V (+/- 10%) conn. 1500 pin 11
NOK
Check power
supply unit
OK
5VA testpoint 1
NOK
Check fuse 1542
D3V3 testpoint 2
Check fuse 1542, IC7535
D5V testpoint 3
Check fuse 1543
OK
POWER_UP signal = +3V3 at testpoint 14
NOK
Check IC7270 MACE
OK
Check fuse 1543, T7520, T7523, T7524D5VS testpoint 4
NOK
L5V testpoint 5
+12VA testpoint 6 Check fuse 1541
Check fuse 1543, T7520, T7523, T7524
P12V testpoint 7
Check fuse 1541
12VPWR testpoint 8 Check fuse 1541, T7527, T7528
+9SRVPWR testpoint 9 Check fuse 1541, T7527, T7528
L12V testpoint 10 Check fuse 1541, safety resistors 3541 and 3542, T7527, T7528
OK
FS30V = +27V at testpoint 11
NOK
Check safety resistor 3545, opamp 7521, T7526, T7522,
T7529, T7548, D6554, D6501, D6500
OK
A-8V testpoint 12
NOK
Check T7525, T7549
L-5V testpoint 13 Check T7525, T7549, IC7556
KILL voltage at testpoint 14
-8V during normal operation
NOK
Check T7560, T7561, T7562, T7563, D6553
OK
OK
POWER PART
OK
Switch on player,
exit stand by mode
POWER PART CHECK
USE CDR MAIN BOARD CIRCUIT DIAGRAM 7 AND CDR MAIN BOARD BOTTOM VIEW : POWER PART TEST POINTS
CL06532018_015.eps
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