Test Mode; Electrical Check - Sony MHC-EC619iP Service Manual

SOFTWARE VERSION
It can confi rm the software version.
Procedure:
1. Press the [ / ] button to turn the power on.
? 1
2. Press the [ ] button to open the disc tray.
Z
3. Press the button on the remote commander as following order.
[CLEAR] → [ ] → [RETURN]
B
(Displayed values in the following fi gure are example)
Screen display
R1395P28
MCU version Model Region MPEG version
Model
Model Display
HCD-EC719iP
7
HCD-EC919iP
9
4. The software version display disappears in about 5 seconds,
and it returns to the display of the normal mode.
FACTORY RESET
It can clear all data including preset data stored in the memory to
initial conditions. Execute this mode when returning the this unit
to the customer.
Procedure:
1. Press the [ / ] button to turn the power on.
? 1
2. Press two buttons of the [ ] and [EQ] simultaneously for fi ve
x
seconds.
3. The message "RESET OK" is displayed on the fl uorescent in-
dicator tube, then returns to the normal mode.
TRAY LOCK
It can be unable to take sample disc out of disc tray in the shop.
Procedure:
1. Press the [ / ] button to turn the power on.
? 1
2. Press the [ ] button to open the disc tray.
Z
3. Set a disc on the disc tray.
4. Press the [ ] button to close the disc tray.
Z
5. Press two buttons of the [ ] and [ ] simultaneously for fi ve
x Z
seconds.
6. The message "LOCKED" is displayed on the fluorescent indi-
cator tube and the disc tray is locked.
(Even if pressing the [ ] button, the message "LOCKED" is
Z
displayed on the fluorescent indicator tube and the disc tray is
locked)
Releasing method:
1. Press two buttons of the [ ] and [ ] simultaneously for fi ve
x Z
seconds.
2. The message "UNLOCKED" is displayed on the fluorescent
indicator tube and the disc tray is unlocked.
HCD-EC719iP/EC919iP
SECTION 3

TEST MODE

CHILD LOCK
It can lock except for the [ / ] button of a main unit to prevent
? 1
from being operated by mistake.
Procedure:
1. Press the [ / ] button to turn the power on.
? 1
2. Press the [ ] button for fi ve seconds.
x
3. The message "LOCK ON" is displayed on the fl uorescent indi-
cator tube and the except for the [ / ] button is locked.
? 1
(Even if pressing except for the [ / ] button, the message
? 1
"LOCK ON" is displayed on the fl uorescent indicator tube and
the operation is locked)
Releasing method:
1. Press the [ ] button for fi ve seconds.
x
2. The message "LOCK OFF" is displayed on the fl uorescent in-
dicator tube and the all buttons are unlocked.
Note: This mode is not released even if it unplugs a power cord.
VFD TEST
It can confi rm the fluorescent indicator tube.
Procedure:
1. Press the [ / ] button to turn the power on.
? 1
2. Press two buttons of the [ ] and [ENTER] simultaneously for
x
fi ve seconds.
3. All segments on the fluorescent indicator tube light up.
Screen display
4. All segments turn off the light in about 3 seconds, and it re-
turns to the display of the normal mode.
CD SECTION
Note:
1. CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3. Use an oscilloscope with more than 10 M impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following check.
RF SIGNAL CHECK
oscilloscope
(DC range)
MAIN board
TP27 (PUHRF) +
TP31 (VREF1)
–
Procedure:
1. Connect the oscilloscope to TP27 (PUHRF) and TP31
(VREF1) on the MAIN board.
2. Press the [ / ] button to turn the power on.
? 1
3. Press the [FUNCTION] button to turn the CD function.
4. Press the [ ] button to open the disc tray.
Z
5. Set the disc (YEDS-18) on the disc tray.
6. Press the [ ] button to close the disc tray.
Z
7. Press the [ ] button to playback.
u
8. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape () in the
center of the waveform can be clearly distinguished.
level: 1.2 ± 0.2 Vp-p
Connection Location:
– MAIN Board (Conductor Side) –
TP31
(VREF1)
TP27
(PUHRF)
15 15
HCD-EC719iP/EC919iP
SECTION 4

ELECTRICAL CHECK

VOLT/DIV: 200 mV
TIME/DIV: 400 ns
TP31
(VREF1)
TP27
(PUHRF)