Philips EXP212 Service Manual page 17

SERVICE TEST PROGRAM – FLOW CHART
To enter the service test program
PRELIMINARY
1. Disconnect the AC/DC adaptor and remove batteries
SETUP
2. Open the CD-door
3. Hold "PLAY" & "PREV" buttons depressed
4. Connect the AC/DC adaptor or insert batteries
Display shows
software-version
(i.e. "S-22")
"NEXT" "MODE"
N N
pressed? pressed?
Y Y
DISPLAY TEST 1 KEY TEST
display shows Display shows
test pattern 1 "--"
"NEXT" key on key on
N
N
pressed? CD-player remote control
depressed? depressed?
Y
Y Y
DISPLAY TEST 2
Display shows Display shows
display shows
keycode keycode + "RC"
test pattern 2
(see table1) (see table1)
"NEXT"
N
pressed?
Y
test pattern 1 (all segments activated)
table2 – playback error analysis
CODE
E 1000
EXP30x EXP50x
E 1001
test pattern 2 (alternate segments activated)
E 1002
E 1003
EXP30x EXP50x
E 1004
table1 – key test
DISPLAY
KEY ON SET
01
DBB
02
PROGRAM
03
MODE
E 1005
05
PLAY
06
NEXT
07
PREVIOUS
E 1006
08
ESP
E 1008
09
+
10
–
KEY ON CORD-RC
04 RC E 1009
STOP
05 RC
PLAY
06 RC
NEXT
E 1020
07 RC
PREVIOUS
Press "STOP" on the CD-player to exit the key test.
3-10
MAIN MENU
"PREV"
N
pressed?
Y
DSP TEST DRAM TEST
Display shows Display shows
"0 dSP" resp. "drc" resp.
"DSP-TEST 0"
"DRAM-CHECK"
DSP Test
DRAM Test
N N N
passed within
passed within
2s?
3s?
Y Y
Display shows Display shows
"1 dSP" resp. "P drc" resp.
"DSP-TEST 1" +
"DRAM OK" +
DSP version
DSP version
(i.e. "t-25")
(i.e. "t-25")
"PLAY"
N N
pressed?
Y
ERROR TYPE CAUSE
focus error non fatal Focus point lost for at least 3ms.
radial error non fatal The radial servo was offtrack for a
certain amount of time.
sledge in error non fatal The slide did not reach it´s inner pos.
(inner switch of CD-drive does not close)
within approx. 6s.
sledge out error non fatal The slide did not come out of it´s inner
pos. (inner switch of CD-drive is open)
within approx. 250ms.
DRAM filling non fatal The DRAM controller was not able to
error connect two consecutive audio frames.
The microcontroller had to perform a
direct audio connection that produces
audible clicks.
jump error non fatal The offtrack values do not decrease
properly when jumping tracks, the jump
destination could not be found.
subcode error non fatal No valid subcode for approx. 230ms.
turntable motor fatal During start-up, the disc speed did not
error reach 75% of the nom. speed within
approx. 6 seconds.
audio error non fatal Uncorrectable audio error (EF error flag
(error flag) from CD-Decoder).
focus search fatal The focus point could not be found
error within approx. 10s (no valid TOC info),
resp. 30s (valid TOC info).
"DBB"
N
pressed?
• State of switches
Y
PLAYBACK TEST
(CDDA-mode only)
Close CD-door &
press "PLAY"
Error during
N
playback?
Y
Display shows Display shows
"F drc" resp. error-code
"DRAM ERROR" +
(see table2)
DSP version
(i.e. "t-25")
• Focus status
N
Fatal error?
Note: If focus has
Y
been lost, focus
start-up procedure
is entered (ramping).
Stop playback
EXIT
SERVICE TEST
PROGRAM
DISC MOT. TEST
• Disc speed status
• Focus status
• On track status
• Disc speed status
• Focus status
table3 – focus sensitivity
DISPLAY ESP-FLAG FOCUS SENSITIVITY
-F01
off Normal focus sensitivity for CDDA
Low focus sensitivity for
-F02
on
high-reflective CD-RW
Medium focus sensitivity for
-F03
on
normal-reflective CD-RW
Track servo jumps
High focus sensitivity for
-F04
on
low-reflective CD-RW 16 tracks forwards
3-10
"PLAY"
N
pressed?
Y
SERVO TEST
Display shows:
"CD xy "
x = door switch
y = inner switch
"0" = closed
"1" = open
"PLAY" "NEXT" "PREV"
N N N
pressed? depressed? depressed?
Y Y Y
Disc motor turns
Slide moves Slide moves
outside inside
FOCUS TEST
" F
" = focus OK
x
"-F x " = focus error ATTENTION: FROM THIS TEST ONWARDS THE
x = focus sensitivity
LASER IS SWITCHED ON !!
(see table3)
→ AVOID DIRECT EXPOSURE TO BEAM !!
"PLAY"
"DBB" "NEXT"
N N N
pressed and
pressed? depressed?
focus OK?
Y Y Y
Toggle focus
Slide moves Slide moves
sensitivity
outside
" D" = speed OK
(see table 3)
"-D" = speed error
" F
" = focus OK
x
"-F x " = focus error
x = focus sensitivity
(see table3)
"PLAY"
and focus OK N
and speed
OK?
Y
RADIAL TEST
" R" = on track
"-R" = not on track
" D" = speed OK
"-D" = speed error
" F
" = focus OK
x
"-F " = focus error
x
x = focus sensitivity
"NEXT" "PREV"
N N
depressed? depressed?
Y Y
CUE-MODE
REVIEW-MODE
Track servo jumps
16 tracks backw.
"MODE" "PROG"
N N
depressed? depressed?
Y Y
Disc motor turns
clockwise counter-clockwise
(accelerate) (brake)
"PREV" "MODE" "PROG"
N N N
depressed? depressed? depressed?
Y Y Y
Disc motor turns Disc motor turns
clockwise counter-clockwise
inside
(accelerate) (brake)