Cd Service Test Program - Philips AZ2785 Service Manual

CD SERVICE TEST PROGRAM

* STOP button pressed in any step returns
to begin of Service Testprogram.
To leave Service Testprogram switch mode switch
*
to off-position.
Door switch is ignored Æ
CD door can be opened.
*
* Volume up/down buttons function independentely
of the service testprogram.
DISPLAY TEST
N
fig. 1
N
PCS 104 451
4-2
CD TEST
To enter Service
Testprogramm hold
PLAY & STOP buttons
depressed while switching
CD mode on.
Display shows
version number Slide servo, Radial servo, Focus servo, Disc motor
of the µP - software. and Laser are switched off.
Mute is switched on via decoder IC.
CD SERVO TEST
NEXT button N PLAY button
pressed? pressed?
Y Y
Display shows all Display shows
segments and flags.
see figure 1
SLIDE test
STOP button N PLAY button NEXT button N
pressed? pressed? pressed?
Y Y Y
FOCUS search
Display shows
Slide moves
outside as long as
button is held
objective moves up&down
depressed.
disc motor for 160ms "on"
N
FOCUS found?
Y
Display shows
disc motor turns.
PLAY button N
pressed?
Y
Display shows
automatic
while autom. track balance adjustment is active
adjustment of
as soon as track balance adjustment finished.
TRACK BALANCE
(1 - 6) indicates the actual setting.
If the margin settings 0 or 7 are displayed the required
setting is possibly out of the adjustment range.
Æ
check disc drive and/or electronic circuitry
Y N N
SHUFFLE button PLAY button
pressed?
pressed?
Y
Display shows
automatic
while autom. focus gain adjustment is active
adjustment of
as soon as focus gain adjustment finished.
FOCUS GAIN
(1 - 6) indicates the actual setting.
If the margin settings 0 or 7 are displayed the required
setting is possibly out of the adjustment range.
Æ
check disc drive and/or electronic circuitry
Y N PLAY button N
SHUFFLE button
pressed?
pressed?
Y
Display shows
automatic
while autom. track gain adjustment is active
adjustment of
as soon as track gain adjustment finished.
TRACK GAIN
(1 - 6) indicates the actual setting.
track servo switched on
If the margin settings 0 or 7 are displayed the required
setting is possibly out of the adjustment range.
Æ
check disc drive and/or electronic circuitry
Y N N
SHUFFLE button PLAY button
pressed?
pressed?
Y
PLAY test
Purpose of PLAY test:
Display shows
To check if the Audio signal is reproduced.
Subcode info is ignored during this test Æ
Æ
Play mode
If the CD player functions well in this testmode,
MUTE is switched off
but not in the normal Play mode check quality
of the eye-pattern signal.
NEXT button PREV button
pressed? pressed?
Y Y
CUE - mode REVIEW - mode
jumps in steps of jumps in steps of
16 tracks forward 16 tracks backwards
DISC MOTOR test
PREV. button N PROG. button N N
SHUFFLE button
pressed? pressed?
pressed?
Y Y Y
Disc motor turns Disc motor turns
Slide moves
counter clockwise clockwise
inside as long as
as long as button as long as button
button is held
is held depressed. is held depressed.
depressed.
(brake) (accelerate)
REGION
PRESET
10
11
12
13
1) How to set frequency grid:
AM - 9 kHz / FM - 50 kHz : Hold BAND & TUNING DOWN buttons depressed while switching MODE-switch to RADIO.
AM - 10 kHz / FM - 100 kHz : Hold BAND & TUNING UP buttons depressed while switching MODE-switch to RADIO.
Selected frequency grid is stored in the EEPROM.
2)
In sets with 30kHz grid on FM band it may occur that the
tuned frequency is indicated wrong on the display because
of tolerances of the discriminator filter.
For that reason the testsoftware is prepared for an
automatic IF-offset correction.
Note:
To execute the automatic IF-offset correction proceed as follows:
* feed a strong 87.5MHz signal to the antenna
* press the PROGRAM button
The µP starts now several times the search mode.
If the transmitter was found at 87.5MHz the stop-frequency sent by the
radio IC is compared with the nominal frequency else the display shows "00E".
When the same difference is found twice the value will be stored as offset.
The actual used offset is shown on the display ( -3, -2, -1, 0, 1, 2, 3 ).
4-2
TUNER TEST
To enter Service
Testprogramm hold
PLAY & STOP buttons
depressed while switching
RADIO mode on.
Display shows
version number
of the µP - software.
DISPLAY TEST TUNER TEST
N NEXT button
pressed?
Y
Service preset frequencies
Display shows all
acc. table 1 are copied
segments and flags.
to the RAM.
Tuner is normal working
see figure 1
except the PROGRAM key.
IF-OFFSET CORRECTION 3)
N STOP button
PROG button N
pressed?
pressed?
Y
Y
IF - OFFSET correction
2)
activated .
SERVICE PRESET FREQUENCIES
EUROPE EUROPE East EUROPE USA OVERSEAS OVERSEAS
FM/MW/LW FM/MW/LW/SW FM/MW/LW FM/MW FM/MW FM/MW/SW
1) Grid switchable 1) Grid switchable
10-100kHz/9-50kHz 10-100kHz/9-50kHz
/00/05/20/25 /00/05/20/25 /14/34 /17/37 /01/21
1 87,5 MHz 87,5 MHz 65,81 MHz 87,5 MHz 87,5 MHz
2 108 MHz 108 MHz 108 MHz 108 MHz 108 MHz
3 531 kHz 531 kHz 74 MHz 530 kHz 530/531 kHz 530/531 kHz
4 1602 kHz 1602 kHz 87,5 MHz 1700 kHz 1700/1602 kHz 1700/1602 kHz
5 558 kHz 558 kHz 531 kHz 560 kHz 560/558 kHz 560/558 kHz
6 1494 kHz 1494 kHz 1602 kHz 1500 kHz 1500/1494 kHz 1500/1494 kHz
7 153 kHz 153 kHz 558 kHz
8 279 kHz 279 kHz 1494 kHz
9 198 kHz 198 kHz 153 kHz
5,9 MHz 279 kHz
17,9 MHz 198 kHz
6,2 MHz
17MHz
table 1
This test functions only with the East European
tuner version used in /14/34 set versions.
The test was executed on every set in the production line.
In case the discriminator filter or the EEPROM has to be
exchanged the automatic IF-offset correction should also be
executed after repair.
PROG button N
(Tuner)
pressed?
Y
STOP button N
pressed?
Y
KOREA CHINA
FM/MW-stereo FM/MW/SW
/01/21 /13/33 /15/35
87,5 MHz 87,5 MHz 87,5 MHz
108 MHz 108 MHz 108 MHz
531 kHz 531 kHz
1602 kHz 1602 kHz
558 kHz 558 kHz
1494 kHz 1494 kHz
3,9 MHz 5,9 MHz
12,1 MHz 17,9 MHz
4,2 MHz 6,2 MHz
11 MHz 17MHz
servtest EVA-PLL, 221098