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Service Test Program - Philips 70DCC600 Service Manual

Digital compact cassette recorder
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SERVICE TEST PROGRAM - FLOW CHART
SYSTEM-CODE 23 (OCC)
KEY
COMMAND·CODE
KEY
COMMAND·CODE
0
00
PREVIOUS
33
1
0'
RECORD MUTE
42
2
02
OPEN/CLOSE
45
3
03
SIDE AlB
47
4
04
RECORD PAUSE
46
5
05
RESET
4'
6
06
BACKWARD
50
7
07
FORWARD
52
6
06
PLAY
53
09
STOP
54
TEXT
11
AECORD
55
STAND BY
12
MARK WRITE
114
REPEAT
28
APPEND
117
NEXT
32
TIME
122
KEY
KEY NUMBER
KEY
KEY NUMBER
RENUMBER
01
RECORD
27
OPEN/CLOSE
03
DOLBY BlC
33
WRITE MARK
os
BACKWARD
35
PREVIOUS
09
CDSYNCHAO
37
APPEND
11
REPEAT
3.
DlGITAUANALOGUE
17
SIDE AlB
41
FORWARD
"
RECOADIPAUSE
43
ERASE MARK
21
TEXT
65
PLAY
23
TIME
67
NEXT
25
RESET
73
(<<0
TRACK
SIDE
ram
TOTAL
REM
TIME
WRITE
MARK
ERASE
cc
lUI'
IWI
lUll
' \ 111
\WI
lUll
"ill
k17'
' 1 111
l\Ul
' W I
~it, ~, ~, ~, ~,:
Ii,
~" ~, ~,
1!JSi
~,
table2
TRACK
REPEAT CONT
L 11111111111111111111111111111'"11111111111111111111 DOlBVmllNR
DIGITAl
ANAlOGUE
R 11111111111111111'111111111111111111111111'111111111
~
-ell
eo so
010
JO
25
20
15
12
9
e
2
0
table1
hg.4
3.3. Key test
To enter the key test fulfil preliminary setup and press the MARK
ERASE·button. The display shows "KEY TEST". Press keys and
check their corresponding key·numbers acc. to tablel.
To exit the key test press the STOP-button.
3.4. IR-test (only for versions with IR-remote control)
To enter the IR-test fulfil preliminary setup and press the DOLBY
BiC-button. The display shows "IRTEST
xxlyy".
"xx" indicates the system code (DCC=23)
"yy"
indicates the command code
Press keys and check their corresponding system
I
command-code
acc. to table2.
To exit the IR-test press the STOP-button.
3.2. Display test
To enter the display test fulfil preliminary setup and press the
DIGITAUANALOGUE-button. The display shows "DISPLAY TEST".
Four display test pattern are available (see fig. 1-4). The patterns
can be scrolled forward resp. backward by pressing the WIND-
resp. REWIND-button.
To exit the display test press the STOP-button.
SERVICE TEST PROGRAM - DESCRIPTIONS
3.1. Display software version of
main-~P
(not on all versions)
To display the software version of the
main-~P
fulfil preliminary
setup and press the TIME-button. The display shows
"MAINVERS Vxx".
"xx" indicates the software version of the
main·~P.
To exit this test press the STOP·button.
3. Preliminary setup SERVICE MODE
- Turn POWER ON
- Follow "start-up procedure" as described on page 27
- Remove cassette from the cassette compartment
- Hold DOLBY
B/C
&
REC.PAUSE depressed, then press PLAY
- To enter servicemodel press the NEXT·button.
The display shows "SERVICE MODE". The available tests can now
be entered pressing the corresponding buttons (see also flow chart,
page 25).
To exit service mode press the STOP-button.
2. Preliminary setup EXTENDED PLAYMODE
- Switch POWER ON
- Follow "start-up procedure" as described on page 27
- Insert a DCC
- Hold DOLBY
B/C
& REC.PAUSE depressed, then press PLAY
The set is now in the extended playmode, music will be audible.
The display shows "x yy
zz
ffff'.
"x" indicates the selected tape channel
"yy"
indicates the error rate of channel x
"zz"
indicates the error rate of channel (x+ 1)
"ffff" counts the number of tape blocks received without C1-error
flags. The counter will be resetted with every C1-error.
Press TIME to increase x by steps of 2.
To select the tape channel for the digital eye output of the DEQ2
press TEXT. The display shows "DIG EYE CH x". To increase the
number of the tape channel press TIME, again.
1. General
The test program is equipped with a service modes, a factory mode
and an extended playback-mode. The service mode includes tests
for display, detection of hole switches, IR-remote control and keys.
The factory mode is a special test program, which is used in the
production process of the front board, but not useful for service
purposes. In the extended playback-mode the error rates (C1 error
flags from DDSP) are shown on the display. Also the tape channel
for the digital eye output olthe DEQ2 (pin1) can be selected.
Display-format: "DIG EYE CH x"
"x" indicates the tape channel selected for the
digital eye output of the DEQ2 (pinl)
3}
Press "TEXT" to increase no. of tape channel
Press "TIME" to exit selection.
Display-format: "x yy
zz
ffff"
"x" indicates the selected tape channel
"yyn
indicates
the error rate of
channel
x
"zz" indicates the error rate of channel (x+1)
"ffff"
counts the number of tape blocks
received without C1-error flags.
Press "TIME" to increase x by steps of 2
PLAY·MODE
Tape channel for
dlg.eye output
can be selected'}
press "TEXT"
PLAY-MODE
Error rates are
shown on display
Press keys of IR-transmitter and check
corresponding systemfcommand-codes acc. to table2.
Display-format: "IRTEST xxiyy"
"xx" indicates the system code (DCC=23
"yy"
indicates the command code
Four display patterns are available
(see fig. 1·4). Patterns can be scrolled by
pressing "WIND" resp. "REWIND".
Press keys and check corresponding
key-numbers acc. to table1.
"xx" indicates the software version of the main-IJP
EXTENDED PLA Y MODE
press "STOP"
FACTORY MODE
not used for service purposes
IR.TEST
2}
KEY·TEST
SOFTWARE-
VERSION
MAIN-~P
')
"xx" indicates the software version
of the
front-~P
Switch POWER ON
To enter service test program hold
"DOLBY BiC"
&
"REC.PAUSE" depressed, then press "PLAY"
r---1
DISPLAY-TEST
1----1
DCC
yes
inserted?
>-'='------~------.------,
Preliminary
setup
service- or
factexy-mode
?
Display shows
"Service mode"
no
Display shows
"Servmode Vxx"
SERVICE MODE
press "NEXT"
t
press "MARK ERASE"
display shows "KEY TEST"
press "DOLBY BiC"
display shows "IRTEST xxiyy"
press "DIGITAUANALOGUE"
display shows "DISPLAY TEST"
press "TIME"
t----1
display shows "MAINVERS Vxx·
press "RECORD"
display shows "HOLE TEST"
HOLE-TEST
Hold indication switch x depressed.
If detection is OK the display shows
"HOLE x OK", else "HOLE TEST"
1--
3.5. Hole test
To enter the hole test fulfil preliminary setup and press the
RECORD-button. The display shows "HOLE TEST". Hold indication
switch x depressed and check display.
If
detection is OK the display
shows "HOLE x OK", else "HOLE TEST".
To exit the hole test press the STOP-button.
press "APPEND"
display shows "TRAY TEST"
press ''TEXT''
display shows "LT-CHECK"
press "STOP"
EXIT
SERVICE MODE
TRAY-TEST
LT-BUS
CHECK '}
Press "OPENiCLOSE"
If tray end switches are OK the display
shows "OPEN OK" resp. "CLOSE OK",
else "OPEN ERROR" resp. "CLOSE ERROR"
Communication between DEQ2, DDSP, ADASiSBC
and
main·~P
can be tested. To choose IC to be
checked press "WIND" resp. "REWIND".
If communication via LT -interface is correct the display
shows ego "DEQ OK", else "DEQ ERROR".
1)
not on all versions
2)
only for versions with IR-remote control
3)
only useful with special measurement eqUipment
fig.1
II/ III II/ III
I"~
,1/
II/ I"
III
,1/
III II/
/II III III /I, /I, III III III III III III III
flg.2
«<0
TRACK
SIDE
Elm
TOTAL
REM
TIME
WRITE
MARK
ERASE
CC
eb:::
TRACK
REPEAT CONT
L 1111111111111111111111111111111111111111111111111111 OOLBVCHilNR
DIGITAL
ANALOGUE
R 1111111111111111111111111111111111111111111111111111
~
.ce eo so
~
JO
25
20
15
12
t
e
2
0
hg.3
3.6. Tray test
To enter the tray test fulfil preliminary setup and press the
APPEND-button. The display shows "TRAY TEST". If tray end
switches are OK the display shows "OPEN OK" resp. "CLOSE OK",
else "OPEN ERROR" resp. "CLOSE ERROR".
To exit the tray test press the STOP-button.
3.7. LT-bus check (not on all versions)
To enter the LT-bus check fulfil preliminary setup and press the
TEXT-button. The display shows "LT-CHECK".
The communication between DEQ2, DDSP, ADAS/SBC and main-
~P
can be tested. To choose the IC to be checked press WIND
resp. REWIND.
If
the communication via LT-interface is correct the
display shows e.g. "DEQ OK", else "DEQ ERROR".
To exit the LT-bus check press the STOP-button.
25
26
CS 45 925

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