Philips CDR570 Service Manual page 20

GB 20 5. CDR 3rd gen.
POWER PART CHECK
USE CDR MAIN BOARD CIRCUIT DIAGRAM 7 AND CDR MAIN BOARD BOTTOM VIEW : POWER PART TEST POINTS
D5VS testpoint 4
L5V testpoint 5
+12VA testpoint 6
P12V testpoint 7
12VPWR testpoint 8
+9SRVPWR testpoint 9
L12V testpoint 10
FS30V = +27V at testpoint 11
KILL voltage at testpoint 14
-8V during normal operation
Service modes, repair tips and faultfinding trees
Switch on player,
exit stand by mode
+5V (+/-5%) conn. 1500 pin 5 and 6
+12V (+/-10%) conn. 1500 pin 10
- 8V (+/- 10%) conn. 1500 pin 11
OK
NOK
5VA testpoint 1
D3V3 testpoint 2
D5V testpoint 3
OK
POWER_UP signal = +3V3 at testpoint 14
OK
NOK
Check fuse 1543, T7520, T7523, T7524
Check fuse 1543, T7520, T7523, T7524
Check fuse 1541
Check fuse 1541
Check fuse 1541, T7527, T7528
Check fuse 1541, T7527, T7528
Check fuse 1541, safety resistors 3541 and 3542, T7527, T7528
OK
NOK
Check safety resistor 3545, opamp 7521, T7526, T7522,
T7529, T7548, D6554, D6501, D6500
OK
NOK
A-8V testpoint 12
L-5V testpoint 13
OK
NOK
Check T7560, T7561, T7562, T7563, D6553
OK
POWER PART
OK
Figure 5-11
NOK
Check power
supply unit
Check fuse 1542
Check fuse 1542, IC7535
Check fuse 1543
NOK
Check T7525, T7549
Check T7525, T7549, IC7556
Check IC7270 MACE
CL06532018_015.eps
290200