Philips CDR880 - Faultfinding Guide; General Faultfinding Flowchart

IC7170-R3124 Radial Error Normalized switch
Reset encoder(CDCEP) and digital servo(DSICR)
1IC7170-1C7130
Reset decoder CD60
C2498-3CONN.1400 __| Analog right output
C2498->CONN. 1420
C2498->C2303
IC7320-31C7325 Reset microcontroller( from user uP
RSTHA
1C73251C7465
Reset
high
active,
reset
for
DAIO
RSTLA IC7325-1C7440 Reset low active, reset for GDIN, servo uP, DSD3, DSICR and
IC7325-R3908 display.
1C7325-3D6130
1C7325—>CONN.1330
Receive data of serial interface
|
SCL
IC7320CONN.1303
|
I°C-bus
clock
for
communication
IC7320<5L5300
SDA
|
IC7320CONN.1303
___
|
I°C-bus
data
to
display
driver
1C7320<>L5300
SDAUX 1IC7405-1C7440 Analog to digital converted data from ADC to DAI-O
| SL+ 1C7105CONN.1101 _| Sledge motor positive connection
SL- IC7105-CONN.1101 Sledge motor negative connection
STROBE 1C7320—1C7465 Control signal for DAI-O : data strobe
IC7320-—CONN. 1302
Start Write 9ms(one shot at start up LWRT)
System synchronization
Track Loss Normalized
Tray sense
Transmit data serial interface
User-data available
UNLOCK 1C7465-1C7320 Not locked on incoming EBU-signal
UNLOCK_GDIN | 1C7323-4R3435 Unlock signal to GDIN
V4
IC7210-CONN.1250
_|
Versatile
pin
4
VFTD Power supply for displa
WCLK 1072109107245 Word clock
PCS 83 979