• HCD-GTR333 is the amplifi er, USB, CD player and tuner
section in MHC-GTR333.
• HCD-GTR555 is the amplifi er, USB, CD player and tuner
section in MHC-GTR555.
• HCD-GTR777 is the amplifi er, USB, CD player and tuner
section in MHC-GTR777.
• HCD-GTR888 is the amplifi er, USB, CD player and tuner
section in MHC-GTR888.Photo: HCD-GTR888 (E2 Model)
“WALKMAN” and “WALKMAN” logo are registered
trademarks of Sony Corporation.
MPEG Layer-3 audio coding technology and patents licensed
from Fraunhofer IIS and Thomson.
Windows Media is a registered trademark of Microsoft
Corporation in the United States and/or other countries.
This product contains technology subject to certain
intellectual property rights of Microsoft.
Use or distribution of this technology outside of this
product is prohibited without the appropriate license(s) from
Microsoft.
CD Section
Model Name Using Similar Mechanism
CD Mechanism Type
Optical Pick-up NameKHM-313CAB/C2NP
E Model
HCD-GTR6/GTR6B/GTR7/GTR8/GTR8B
CDM74HF-DVBU101//M
Amplifi er section
The following are measured at AC 120 V –
240 V, 50/60 Hz
MHC-GTR888
Front/Satellite speaker
Power Output (rated):
290 W + 290 W (at 4 Ω, 1 kHz, 1% THD)
Front speaker
RMS output power (reference):
360 W + 360 W (per channel at 6 Ω, 1 kHz)
Satellite speaker
RMS output power (reference):
180 W + 180 W (per channel at 12 Ω, 1 kHz)
Subwoofer
RMS output power (reference):
260 W + 260 W (per channel at 8 Ω, 100 Hz)
MHC-GTR777
Front/Satellite speaker
Power Output (rated):
190 W + 190 W (at 4 Ω, 1 kHz, 1% THD)
Front speaker
RMS output power (reference):
220 W + 220 W (per channel at 6 Ω, 1 kHz)
Satellite speaker
RMS output power (reference):
110 W + 110 W (per channel at 12 Ω, 1 kHz)
Subwoofer
RMS output power (reference):
170 W + 170 W (8 Ω, 100 Hz)
MHC-GTR555
Front speaker
Power Output (rated):
160 W + 160 W (at 5 Ω, 1 kHz, 1% THD)
RMS output power (reference):
250 W + 250 W (per channel at 5 Ω, 1 kHz)
Subwoofer
RMS output power (reference):
250 W (5 Ω, 100 Hz)
SPECIFICATIONS
MHC-GTR333
Front speaker
Power Output (rated):
130 W + 130 W (at 4 Ω, 1 kHz,1% THD)
RMS output power (reference):
250 W + 250 W (per channel at 4 Ω, 1 kHz)
Inputs
TV (AUDIO IN) L/R
Voltage 1.2 V, impedance 47 kΩ
DVD/PC (AUDIO IN) L/R
Voltage 1.2 V, impedance 47 kΩ
MIC (MHC-GTR888/MHC-GTR777 only)
Sensitivity 1 mV, impedance 10 kΩ
A, B port: Type A
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3):
32 kbps – 320 kbps, VBR
WMA: 48 kbps – 192 kbps
AAC: 48 kbps – 320 kbps
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3):
32 kHz/44.1 kHz/48 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
Disc player section
System
Compact disc and digital audio system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6 μW
* This output is the value measurement at
a distance of 200 mm from the objective
lens surface on the Optical Pick-up Block
with 7 mm aperture.
Frequency response
20 Hz – 20 kHz
Signal-to-noise ratio
More than 90 dB
Dynamic range
More than 88 dB
Tuner section
FM stereo, FM/AM superheterodyne tuner
Antenna:
FM lead antenna
AM loop antenna
FM tuner section
Tuning range
87.5 MHz – 108.0 MHz (50 kHz step)
AM tuner section
Tuning range
Pan American models:
530 kHz – 1,710 kHz (10 kHz step)
531 kHz – 1,710 kHz (9 kHz step)
Other models:
530 kHz – 1,610 kHz (10 kHz step)
531 kHz – 1,602 kHz (9 kHz step)
COMPACT DISC RECEIVER
General
Power requirements
AC 120 V – 240 V, 50/60 Hz
Power consumption
MHC-GTR888: 220 W
MHC-GTR777: 160 W
MHC-GTR555: 150 W
MHC-GTR333: 110 W
Dimensions (w/h/d) (excl. speakers)
(Approx.)
280 mm × 333 mm × 439.5 mm
Mass (excl. speakers) (Approx.)
HCD-GTR888: 7.1 kg
HCD-GTR777/HCD-GTR555: 6.7 kg
HCD-GTR333: 6.4 kg
Supplied accessories
Remote control (1)
R6 (Size AA) batteries (2)
FM lead/AM loop antenna (1)
Spacer A (MHC-GTR888 only) (2)
Spacer B (MHC-GTR888 only) (2)
Design and specifi cations are subject to change
without notice.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
FLEXIBLE CIRCUIT BOARD REPAIRING
• Keep the temperature of soldering iron around 270 °C during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following
safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
To Exposed Metal
Parts on Set
1.5 kΩ0.15 μF
Earth Ground
AC
voltmeter
(0.75 V)
Fig. A. Using an AC voltmeter to check AC leakage.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specifi ed herein may result in hazardous
radiation exposure.
This appliance is classified as a CLASS 1
LASER product. This marking is located on
the rear exterior.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN
THE PARTS LIST ARE CRITICAL TO SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS
WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS
MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
6-6. CD Mechanism Section (2) ............................................. 77
7. ELECTRICAL PARTS LIST ............................... 78
3
HCD-GTR333/GTR555/GTR777/GTR888
Ver. 1.1
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic break-down because of the potential difference generated by
the charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The fl exible board is easily damaged and should be handled with
care.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc refl ective surface by the objective lens in the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution: The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscous (sticky, less prone to fl ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
MODEL IDENTIFICATION
– Back Panel –
PART No.
ModelPart No.
HCD-GTR333: E2, E51, AR /
HCD-GTR555: AR
HCD-GTR333: MX
HCD-GTR555: E2, E51
HCD-GTR555: MX
HCD-GTR777, GTR888: E2, E51, AR
HCD-GTR777, GTR888: MX
4-265-400-0[]
4-265-400-2[]
4-265-400-5[]
4-265-400-7[]
4-265-401-0[]
4-265-401-2[]
NOTE OF REPLACING THE IC102 AND IC4605 ON
THE DMB21 BOARD
IC102 and IC4605 on the DMB21 board cannot exchange with
single. When these parts on the DMB21 board are damaged, exchange the entire mounted board.
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure:
1. Press [I/
STANDBY] button to turn the power on.
1
2. Press the [CD/DISC SKIP] button to select CD function.
3. While pressing the [TV] button, press the [
OPEN/CLOSE]
Z
button for more 5 seconds).
4. The message “UNLOCKED” is displayed and the disc tray is
unlocked.
Note: When “LOCKED” is displayed, the slot lock is not released by
turning power on/off with the [I/
STANDBY] button.
1
Note: Refer to supplement-1 for the printed wiring board,
schematic diagram and electrical parts list of MAIN board
(Suffi x-13 and Suffi x-21).
4
HCD-GTR333/GTR555/GTR777/GTR888
MICOM (IC500) ON MAIN BOARD SERVICE POSITION
• In checking the MICOM (IC500) on the MAIN board, prepare two extension jigs (1-843-138-11: 14 cores, 150 mm (common)/
1-843-140-11: 10 cores, 150 mm (for 2CH DAMP board)/ 1-843-139-11: 12 cores, 150 mm (for 3CH DAMP board)/ 1-843-138-11:
14 cores, 150 mm (for 4CH DAMP board).
• This mode is used to check the fl uorescent indicator tube,
LEDs, keys, [MASTER VOLUME] jog, model, destination
and software version.
Procedure:
1. Press [TV] button and [OPTION] button simultaneously
and hold 3 seconds.
2. All LEDs and segments in fl uorescent indicator tube are
lighted up.
3. When you want to enter to the software version display
mode, press [PRESET EQ] button. The model information
appears on the fl uorescent indicator tube.
• “GFX 2” is shown for MHC-GTR333.
• “GFX 3S” is shown for MHC-GTR555.
• “GFX 4S” is shown for MHC-GTR777.
• “GFX 7S” is shown for MHC-GTR888.
Press [PRESET EQ] button again to view the destination
information.
4. During the destination information display, press [PRESET
EQ] button. Each time [PRESET EQ] button is pressed,
the fl uorescent indicator tube shows the version of each
category software in the following sequence: SC, MTK
(DMB Board fi rmware version), UI, PF, SYS, CD, CDMA,
CDMB, ST, TA TAS, TM and return back to model
information display.
5. When [SEARCH] button is pressed while the version
numbers are being displayed except model and destination,
the date of the software creation appears. When [SEARCH]
button is pressed again, the display returns to the software
version display. When [PRESET EQ] button is pressed
while the date of the software creation is being displayed,
the date of the software creation is displayed in the same
order of software version display.
6. Press [GROOVE] button, the key check mode is activated.
7. In the key check mode, the fl uorescent indicator tube displays
“K 0 V0”.
Each time a button is pressed, “K” value increases. However,
once a button has been pressed, it is no longer taken into
account.
“V” value increases in the manner of 0, 1, 2, 3 ... if
[MASTER VOLUME] knob is turned clockwise, or it
decreases in the manner of 0, 9, 8, 7 ... if [MASTER
VOLUME] knob is turned counterclockwise.
8. When [DJ EFFECT] button is pressed after all LEDs and
segments in fl uorescent indicator tube light up, alternate
segments in fl uorescent indicator tube and LEDs would
light up. If you press [DJ EFFECT] button again, another
half of alternate segments in fl uorescent indicator tube and
LEDs would light up. Pressing [DJ EFFECT] button again
would cause all segments in fl uorescent indicator tube and
LEDs light up.
9. To release from this mode, press three buttons in the same
manner as step 1, or disconnect the power cord.
[COMMON TEST MODE]
• This mode is used to check operations of the Amplifi er
section.
Procedure:
• To enter Common Test Mode
1. Press [USB/USB SELECT] button and [GROOVE] button
simultaneously and hold for 3 seconds.
2. The bar segment fl ash on the fl uorescent indicator tube.
The function is changed to TV and the volume is changed
to VOLUME MIN.
• Check of Amplifi er
1. Press [PRESET EQ] button repeatedly until a message
“GEQ MAX” appears on the fl uorescent indicator tube.
GEQ increases to its maximum.
2. Press [PRESET EQ] button repeatedly until a message
“GEQ MIN” appears on the fl uorescent indicator tube.
GEQ decreases to its minimum.
3. Press [PRESET EQ] button repeatedly until a message
“GEQ FLAT” appears on the fl uorescent indicator tube.
GEQ is set to fl at.
4. When the [MASTER VOLUME] knob is turned clockwise
even slightly, the sound volume increases to its maximum
and a message “VOLUME MAX” appears on the fl uorescent
indicator tube.
5. When the [MASTER VOLUME] knob is turned counterclockwise even slightly, the sound volume decreases to its
minimum and a message “VOLUME MIN” appears on the
fl uorescent indicator tube.
• To release from Common Test Mode
1. To release from this mode, press [POWER] button.
2. The cold reset is enforced at the same time.
[COLD RESET]
• The cold reset clears all data including preset data stored
in the EEPROM to initial conditions. Execute this mode
when returning the set to the customer.
• Procedure:
1. Press [POWER] button to turn on the system.
2.
for 3 seconds.
3. “COLD RESET” appears on the fl uorescent
tube becomes blank for a while, and the system is
reset.
Press [x] button and [POWER] button simultaneously
indicator tube. After that, the fl uorescent indicator
[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, European and Russian models.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Press [FUNCTION] button repeatedly to select the
“AM”.
3. Press [POWER] button to turn off the system.
4. Press [SEARCH] button and [POWER] button
simultaneously. The system turns on automatically.
The message “AM 9K STEP” or “AM 10K STEP”
appears on the fl uorescent indicator tube and thusthe channel step is changed.
[CD SHIP MODE (WITH MEMORY CLEAR)]
• This mode moves the optical pick-up to the position durable
to vibration and clears all data including preset data stored
in the EEPROM to initial conditions during the next
AC-In. Use this mode when returning the set to the customer
after repair.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [GROOVE] button and [POWER] button
simultaneously for 3 seconds. The system turns off
automatically.
4. Message “MECHA LOCK” is displayed on the
fl uorescent indicator tube and the CD ship modeis set.
[CD SHIP MODE (WITHOUT MEMORY CLEAR)]
• This mode moves the optical pick-up to the position
durable to vibration. Use this mode when returning the set
to the customer after repair.
15
HCD-GTR333/GTR555/GTR777/GTR888
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [EX-CHANGE] button and [POWER] button
simultaneously. The system turns off automatically.
4. Message “MECHA LOCK” is displayed on the
fl uorescent indicator tube and the CD ship mode is
set.
[CD TRAY LOCK MODE]
• This mode let you lock the disc tray. When this mode is
activated, the disc tray will not open when [Z OPEN/
CLOSE] button or [EX-CHANGE] button is pressed. The
message “LOCKED” will be displayed on the fl uorescent
indicator tube. This mode only applied when there is disc(s)
on the tray.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function.
3. Press [STOP] button and [ENTER] button simultaneously and hold down until “LOCKED”
or “UNLOCKED” displayed on the fl uorescent
indicator tube (around 5 seconds).
[FACTORY PRESET]
• This mode is use to load all the factory use preset
frequencies into FM 1-FM 20 and AM 1-AM 10. Originally,
frequency of FM 1-FM 20 and AM 1-AM10 are set to the
minimum frequency.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Press [TV] button and [FUNCTION] button
simultaneously and hold for 3 seconds, message
“FACTORY” appears on the fl uorescent indicator
tube. The function is changed to TUNER automatically.
[CDM AGING MODE]
• This mode is used to display the total count of meter
pointer touch initial switch and max switch.
• Procedure:
1. Press [POWER] button to turn on the system.
2. Select CD function and All DISC play mode.
3. Put discs on all trays and close the tray.
4. Press [B ??] button and [EXCHANGE] button
simultaneously for 3 seconds.