Sony HCD-EX660Z / HCD-EX880Z / HCD-EX990Z / MHC-EX660 / MHC-EX880 / MHC-EX990 Service Manual ▷ View online
HCD-EX660Z/EX880Z/EX990Z
13
SECTION 3
TEST MODE
COLD RESET
The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
The cold reset clears all data including preset data stored in the
memory to initial conditions. Execute this mode when returning
the set to the customer.
Procedure
:*
1. In standby status, press the [
?/1
] button to turn on the system.
2. Press three buttons of [
x
], [OPTIONS] and [
?/1
] simultaneously.
3. When “RESET” appears, the set enters standby status.
PANEL TEST MODE
This mode is used to check the liquid crystal display, keys, [VOLUME]
knob, model, destination and software version.
This mode is used to check the liquid crystal display, keys, [VOLUME]
knob, model, destination and software version.
Enter The Panel Test Mode
Procedure:
1. In standby status, press the [
Procedure:
1. In standby status, press the [
?/1
] button to turn the power on.
2. Press three buttons of [
x
], [-] and [
?/1
] simultaneously.
3. All LEDs and segments of liquid crystal display will light up.
Version Check
Procedure:
1. In Panel Test Mode, press the [FUNCTION] button.
2. On the liquid crystal display panel, date and version are
Procedure:
1. In Panel Test Mode, press the [FUNCTION] button.
2. On the liquid crystal display panel, date and version are
displayed alternately.
3. From this status, press the [EQ] button, the destination and
model name are displayed alternately.
4. To release from this mode, press three buttons of [
x
], [-]
and [
?/1
] simultaneously.
Key & Encoder Test check
Procedure:
1. In Panel test mode, press the [ENTER] button.
2. The message “KEY0 0 0” displayed. Whenever any buttons
Procedure:
1. In Panel test mode, press the [ENTER] button.
2. The message “KEY0 0 0” displayed. Whenever any buttons
are pressed, the value is change.
3. To release from this mode, press three buttons of [
x
], [-]
and [
?/1
] simultaneously.
COMMON TEST MODE
This mode is used to check operations of the Amplifi er section.
Procedure:
1. To enter Common Test Mode, press three buttons of [FUNCTION],
This mode is used to check operations of the Amplifi er section.
Procedure:
1. To enter Common Test Mode, press three buttons of [FUNCTION],
[OPTIONS] and [
?/1
] simultaneously.
2. “COMMON” appears on the liquid crystal display panel. The
volume is changed to VOLUME MIN.
Check
of
Amplifi er
1.
Press the [EQ] button repeatedly until a message “EQ MAX”
appears on the liquid crystal display panel. EQ increases
to its maximum.
appears on the liquid crystal display panel. EQ increases
to its maximum.
2.
Press the [EQ] button repeatedly until a message “EQ MIN”
appears on the liquid crystal display panel. EQ decreases
to its minimum.
appears on the liquid crystal display panel. EQ decreases
to its minimum.
3.
Press the [EQ] button repeatedly until a message “EQ FLAT”
appears on the liquid crystal display panel. EQ is set to fl at.
appears on the liquid crystal display panel. EQ is set to fl at.
4. When the [VOLUME] knob is turned clockwise even
slightly, the message “VOL 29” (for EX660Z and EX880Z)
or “VOL 31” (for EX990Z) appears on the liquid crystal
display panel. Sound is set to Standard Volume Position
(SVP).
or “VOL 31” (for EX990Z) appears on the liquid crystal
display panel. Sound is set to Standard Volume Position
(SVP).
5. When the [VOLUME] knob is turned clockwise even
slightly, the message “VOL MAX” appears on the liquid
crystal display panel. Sound is set to volume maximum.
crystal display panel. Sound is set to volume maximum.
6. When the [VOLUME] knob is turned counterclockwise
even slightly, the message “VOL MIN” appears on the
liquid crystal display panel. Sound is set to volume mini-
mum.
liquid crystal display panel. Sound is set to volume mini-
mum.
3. To release from this mode, press the [
?/1
] button.
4. The cold reset is enforced at the same time.
CD THEFT PREVENTION
This mode let you lock the disc tray. When this mode is activated,
the disc tray will not open when the [
This mode let you lock the disc tray. When this mode is activated,
the disc tray will not open when the [
Z
] button is pressed. The
message “LOCKED” will be displayed on the liquid crystal
display panel. This mode only applied when there is disc on the
tray.
Procedure:
1. In standby status, press the [
display panel. This mode only applied when there is disc on the
tray.
Procedure:
1. In standby status, press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press the [
3. Press the [
x
] and [
Z
] button simultaneously and hold down
for around 5 seconds until “LOCKED” or “UNLOCKED” is
displayed on the liquid crystal display panel.
displayed on the liquid crystal display panel.
TUNER STEP CHANGE
The step interval of AM channels can be toggled between 9 kHz
and 10 kHz. This mode is not available for Saudi Arabian, Euro-
pean and Russian models.
Procedure:
1. Press the [
The step interval of AM channels can be toggled between 9 kHz
and 10 kHz. This mode is not available for Saudi Arabian, Euro-
pean and Russian models.
Procedure:
1. Press the [
?/1
] button to turn on the system.
2. Press the [FUNCTION] button repeatedly to select the “AM”.
3. Press the [
3. Press the [
?/1
] button to turn off the system.
4. Press the [DISPLAY] button on the remote control to enter
clock mode or demo mode, then press the [TUNING +
M
L
]
and [
?/1
] button simultaneously.
5. The system turns on automatically. The message “9K STEP”
or “10K STEP” appears on the liquid crystal display panel and
thus the channel step is changed.
thus the channel step is changed.
PROTECT KIND CHECK TEST MODE
This mode is used to check type of protect occurred during
protector on.
Procedure:
1. During protection on, LCD will toggle between “PROTECT
This mode is used to check type of protect occurred during
protector on.
Procedure:
1. During protection on, LCD will toggle between “PROTECT
EXX” message & protector kind message display.
Indication of display tube
Breakdown of defect
PROTECT E01
Defect of AMP circuit & SMPS
overload.
overload.
PROTECT E02
Defect of fan, output speaker,
7V regulator & 9V regulator
circuit.
7V regulator & 9V regulator
circuit.
OVER CURRENT
Defect of power supply circuit
to 5V regulator (USB).
to 5V regulator (USB).
1. Defect of AMP circuit
1-1. If PROTECT mode is in “PROTECT ERROR 01”,
The following defect can be considered.
1-1. If PROTECT mode is in “PROTECT ERROR 01”,
The following defect can be considered.
The kind of defect
The cause is considered
OTP (Over Temperature
Protection)
Protection)
Unusual heat of MOSFET by
assemble defect of heatsink
and destruction of MOSFET
etc..
assemble defect of heatsink
and destruction of MOSFET
etc..
Unusual output of Power
mount
mount
The power mount is unusual
output. Please refer the point
of power mount.
output. Please refer the point
of power mount.
HCD-EX660Z/EX880Z/EX990Z
14
SMPS overload
Current surge to MOSFET by
MOSFET and defect of PS
output line.
MOSFET and defect of PS
output line.
1-2. If output does not come out even if the set status is
not in PROTECT mode
The following defect can be considered.
The kind of defect
The cause is considered
Under Voltage
SMPS switching MOSFET de-
fect.
fect.
RESET defect
Reset signal status from mi-
com is not ‘H’.
com is not ‘H’.
2. Defect of power supply (regulator)
2-1. If the PROTECT mode is “PROTECT ERROR 02”,
The following defect can be considered.
2-1. If the PROTECT mode is “PROTECT ERROR 02”,
The following defect can be considered.
The kind of defect
The cause is considered
OCP (Over Current Protection)
Unusual output voltage of 7V &
9V regulator short.
9V regulator short.
Fan block
Fan supply draw current.
DC Detection
DC appears in SP terminal by
defect of AMP IC and MOS-
FET or output of short-circuit.
defect of AMP IC and MOS-
FET or output of short-circuit.
HCD-EX660Z/EX880Z/EX990Z
15
SECTION 4
ELECTRICAL ADJUSTMENTS
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-
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 checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
+
–
BD76 board
oscilloscope
(DC range)
CL102 (RFOUT)
CL117 (VREF)
Procedure:
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
(VREF) on the BD76 board.
2. Press the [
?/1
] button to turn the power on, and press the
[FUNCTION] button to select CD function.
3. Set disc (YEDS-18) and press the [
u
] button to playback.
4. 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.
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
1.1 ± 0.4 Vp-p
1.1 ± 0.4 Vp-p
Checking Location:
– BD76 Board (Side B) –
– BD76 Board (Side B) –
CL102
(RFOUT)
CL117
(VREF)
IC101
CD SECTION
FM AUTO STOP CHECK
Procedure:
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
1. Turn the power on.
2. Input the following signal from Signal Generator to FM an-
tenna input directly.
Carrier frequency : A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation
Deviation
: 75 kHz
Modulation
: 1 kHz
ANT input
: 35 dBu (EMF)
Note: Please use 75 ohm “coaxial cable” to connect SG and the set. You
cannot use video cable for checking.
Please use SG whose output impedance is 75 ohm.
3. Set to FM tuner function and scan the input FM signal with
automatic scanning.
4. Confi rm that input Frequency of A, B and C detected and auto-
matic scanning stops.
The stop of automatic scanning means “The station signal is re-
ceived in good condition”.
ceived in good condition”.
signal
generator
set
+
–
75
:
TUNER SECTION
0 dB = 1
V
HCD-EX660Z/EX880Z/EX990Z
16
SECTION 5
DIAGRAMS
• Circuit Boards Location
PANEL board
TUNER1 board
BD76 board
LOADING board
MODULE PHD board (EX660Z)
MODULE board (EX880Z/EX990Z)
MODULE board (EX880Z/EX990Z)
AMP-SMPS board (EX660Z/EX880Z)
AMP-SMPS PC board (EX990Z)
AMP-SMPS PC board (EX990Z)
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