Philips CDR785/00 Service Manual page 29

SERVICE TESTPROGRAM
CD-CHANGER MODULE
CD SERVO TEST
CD1 button
N N
pressed?
Tray (open/close button) and Carousel
(CD1, 2, 3 buttons) work as in normal mode.
Y
After activation of the tray or the carousel
program returns to SERVO test.
SERVO test
Display shows
CD
see also fig. 1
DISC MOTOR test
Y N N
STOP button PLAY button
REC LEVEL button
pressed? pressed?
pressed?
Y Y
FOCUS search
Display shows:
CCW
Display shows
Disc motor turns
FOC ERR
counter clockwise
as long as button
objective moves up&down
is held depressed.
(brake)
N
FOCUS found?
Slide can be activated in FOCUS test too:
Y
check if Focus functions over the whole disc area
STOP button pressed in
Display shows
FOCUS- or RADIAL-test
FOC OK
returns to SERVO-test
N PLAY button
pressed?
Y
DISC SERVO
Disc speeds up.
Display shows
DISC OK
PLAY button N
pressed?
Y
RADIAL test
Display shows
RDL
→ Play mode
MUTE is switched off
(single speed)
N NEXT 6 button PREV 5 button N
pressed? pressed?
Y Y
CUE - mode REVIEW - mode
jumps in steps of jumps in steps of
16 tracks forwards 16 tracks backwards
as long as button as long as button
is hold depressed. is hold depressed.
5-4
A SLIDE test
B
NEXT 6 button PREV 5 button
N N N
PROG button
pressed?
pressed?
Y Y
Display shows: Display shows: Display shows:
CW SLD O SLD I
Disc motor turns
Slide moves Slide moves
clockwise
outside as long as inside as long as
as long as button
button is held button is held
is held depressed.
depressed. depressed.
(accelerate )
B
1 2
CD RW
indicates speed - single speed or double speed
note: when double speed is set output is muted in RADIAL test
In the steps SERVO test and FOCUS search
Single/double speed
between single speed (1x) and double speed (2x) with the TEXT button.
Flag 1 or 2 of the music calendar indicates the actual speed.
Since the CD-RW reflects much less light than an ordinary CD-DA
the gain of the HF-amplifier stage and the sensitivity of the ADC inside
the Signal Processor must be increased to find the focus point.
In normal play mode high/low - gain is switched automatically.
In Service Test Mode, with the TRACK EDIT button, the gain/sensitivity can be
toggled manually between high or low as soon as the SERVO test has been entered.
When the set is switched to high gain, RW flag is indicated on the display.
NOTE: If sensitivity is switched to CDRW the set
might not work with normal Audio CDs!
Purpose of RADIAL test:
To check if the Audio signal is reproduced.
Subcode info is ignored during this test →
If the CD player functions well in this testmode,
but not in the normal Play mode check quality
of the eye-pattern signal.
Display shows absolute playing time of the disc
in order one can determine position of the slide.
If the playing time is not shown (display flickers)
the pickup is possibly out of the program area of
the disc. Press Next or Prev to move slide inside.
To enter Service
* To leave Service Testprogram plug mains cord off.
Testprogram hold
CD y CD & NO buttons
depressed while
plugging mainscord in.
On/Off switch in pos. ON
S
Display shows
stands for Service mode
version number VXX
stands for version number
of the µP - software.
of the software used in the
S-CDR785-VXX
front µP.
N
pressed?
Y
A
fig. 1
indicates the chosen disc - 1, 2 or 3
indicates sensitivity - CD or CDRW
the disc speed can be toggled manually
5-4
CD PLAY TEST 1)
CD3 button
pressed?
Y
Display shows:
STANDBY
for 5s.
Set is switched to
Standby mode.
PLAY button
pressed?
Y
CD is in normal
PLAY mode.
In case of failures
error codes acc. table 1
will be indicated
on the display.
MAINS CORD
plugged off?
Y
Exit Service Testprogram
CD ERROR CODES
Error number Error description
E1000 Focus Error
Triggered when the focus is lost for more than 250ms while playing the CD.
E1001 Radial error
Triggered when the radial servo is not on track for a certain time during playing the CD.
E1002 Slide-in error
Generated when the inner-switch did not close within approx. 6s when the pick up is
moved inside. Inner-switch or slide motor problems.
E1003 Slide-out error
Generated when the inner-switch did not open within approx. 250ms when the pick up is
moved from the inner position outside. Inner-switch or slide motor problems.
E1005 Jump error.
Triggered when the servo processor counts too less tracks in a defined time during JUMPS.
This can be caused by a disturbed HF-signal (the tracks cannot be recognized exactly),
slide motor problems, track servo problems or scratched discs.
E1006 Subcode Error
No valid subcode for 300ms during PLAY .
E1007 PLL lock error
When no valid subcode was found within 300ms PLL is checked. If PLL is locked E1006
will be indicated else E1007 and the servo is stopped and restarted once again to recover
(as if the user would have pressed STOP and then PLAY immediately).
E1008 Disc motor error
Generated when the CD could not reach 75% of speed during startup within 1,2s.
E1020 Focus Search Error
Triggered when the focus could not be found within 4s when starting up the CD.
table 1
→
Error type: W = Warning set continues operation, message remains on the display until next error occurs
or any key is pressed.
F = Fatal Error →
set stops operation, message remains on the display.
1)
The CD PLAY TEST is intended to be used
for continuously playing a disc in order to
N
detect intermittent or not reproducible
failures. The error code indicates where
the failure can be found.
N
N
Error type
W
W
W
W
W
W
W
W
F
CDR785 servtest CDC, 070400