Sony HCD-EX66 / HCD-EX88 / HCD-EX99 / MHC-EX66 / MHC-EX88 / MHC-EX99 Service Manual ▷ View online
HCD-EX66/EX88/EX99
13
2-7. KNOB (VOL)
2-8. CD MECHANISM DECK
hole
2 knob (VOL)
1 Push the knob (VOL) by flat-head screwdriver.
front panel block
(back view)
(back view)
5 top lid
7 CD mechanism deck block
3 top panel
2
4 two screws
(+P tapping (B2.6))
4 two screws
(+P tapping (B2.6))
6 wire (flat type) (5 core)
1 four screws
(+BVTP 3
u10)
HCD-EX66/EX88/EX99
14
2-9. BASE UNIT
2-10. OPTICAL PICK-UP
1 two floating screws
(+PTPWH M2.6)
2 two screws
(+BVTP 2.6 (3CR))
4 two coil springs (insulator)
3 two stoppers (BU)
4 two coil springs (insulator)
6 two insulators
6 two insulators
7 base unit
top panel block
(bottom view)
(bottom view)
5
1 Remove the four solders.
2 wire (flat type) (16 core)
(CN201)
4 BD76 board
3 optical pick-up
HCD-EX66/EX88/EX99
15
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.
Procedure:
1. In the standby status, press the [
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 the standby status, press the [
?/1
] button to turn the power
on.
2. Press three buttons of [
x
], [FUNCTION] and [
?/1
] simultane-
ously.
3. When “RESET” appears, the set enters standby status.
PANEL TEST MODE
Enter The Panel Test Mode
Procedure:
1. In the standby status, press the [
Enter The Panel Test Mode
Procedure:
1. In the standby status, press the [
?/1
] button to turn the power
on.
2. Press three buttons of [
x
], [OPTIONS] and [
?/1
] simultane-
ously.
3. When the panel test mode is activated, all LEDs and segments
of the liquid crystal display panel are all turned on.
Version Check
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
crystal display panel are turned on), press the [FUNCTION]
button.
button.
2. On the liquid crystal display panel, date and version are dis-
played “xxxxVxxx”.
3. From this status, press the [
u
] button, and the destination and
model name are displayed.
4. To release from this mode, press three buttons of [
x
], [OP-
TIONS] and [
?/1
] simultaneously.
Key Test Mode
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
Procedure:
1. In the panel test mode (all LEDs and segments of the liquid
crystal display panel are turned on), press the [
x
] button.
2. The message “KEY0 0 0” displayed. Whenever any buttons
are pressed and the [VOLUME] control is turned, the value is
changed.
changed.
3. To release from this mode, press three buttons of [
x
], [OP-
TIONS] and [
?/1
] simultaneously.
CD TRAY LOCK
This mode is for the antitheft of CD disc in shop. (not for transport)
Procedure:
1. Press the [
This mode is for the antitheft of CD disc in shop. (not for transport)
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Insert a disc.
4. While pressing the [
3. Insert a disc.
4. While pressing the [
x
] button for more 5 seconds.
5. The message “CHILD LOCK ON” is displayed and the disc
tray is locked. (Even if releasing from this mode, the disc tray
is still locked)
is still locked)
6. If press the [
Z
] button to eject the disc, the message “CHILD
LOCK” is displayed and can not eject the disc.
7. To release this lock, while pressing the [
x
] button for 5 sec-
onds again.
8. The message “CHILD LOCK OFF” is displayed and the disc
tray is unlocked.
CD POWER MANAGE
This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.
Procedure:
1. Press the [
This mode is for switch the CD power supply on/off. Even if this
state pulls out AC plug, it is held.
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select CD function.
3. Press the [
3. Press the [
?/1
] button again to turn the power off (clock
mode).
4. After pressing the [DISPLAY] button on the remote com-
mander, while pressing the [
x
] button, press the [
?/1
] button.
5. It turns power on and display “CD/USB”, then display “PWR
ON” or “PWR OFF”.
CHANGE-OVER THE AM TUNING INTERVAL
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the [
The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select TUNER AM function.
3. Press the [
3. Press the [
?/1
] button again to turn the power off (clock
mode).
4. After pressing the [DISPLAY] button on the remote com-
mander, while pressing the [TUNING +
M
L
] button,
press the [
?/1
] button.
5. It turns power on and display “9k STEP” or “10k STEP”, and
thus the tuning interval is changed over.
CD SHIP MODE
This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.
Procedure:
1. Press the [
This mode can run the CD sled motor optionally. Use this mode,
for instance, when cleaning the optical pick-up.
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Confi rm there is no disc in tray.
3. Press the [FUNCTION] button to select CD function.
4. Press two buttons of [
3. Press the [FUNCTION] button to select CD function.
4. Press two buttons of [
x
] and [
?/1
] simultaneously.
5. Set to the CD ship mode (chucking on).
6. After blink “STANDBY”, “CHILD LOCK ON” is displayed,
6. After blink “STANDBY”, “CHILD LOCK ON” is displayed,
disconnect the AC plug.
CD SHIP AND COLD RESET
Procedure:
1. Press the [
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Confi rm there is no disc in tray.
3. Press the [FUNCTION] button to select CD function.
4. Press three buttons of [ENTER], [TUNING–
3. Press the [FUNCTION] button to select CD function.
4. Press three buttons of [ENTER], [TUNING–
l
m
] and
[
?/1
] simultaneously.
5. After blink “STANDBY”, “RESET” is displayed, disconnect
the AC plug.
HCD-EX66/EX88/EX99
16
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
Ω 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
level:
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
μV
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