DOWNLOAD Sony HCD-ZT4 / LBT-ZT4 Service Manual ↓ Size: 3.76 MB | Pages: 84 in PDF or view online for FREE

Model
HCD-ZT4 LBT-ZT4
Pages
84
Size
3.76 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-zt4-lbt-zt4.pdf
Date

Sony HCD-ZT4 / LBT-ZT4 Service Manual ▷ View online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
HCD-ZT4
SPECIFICATIONS
COMPACT DISC DECK RECEIVER
9-889-196-02
2010G05-1
© 
2010.07
US Model
Ver. 1.1  2010.07
•  HCD-ZT4 is the amplifi er, USB, CD player, tape 
deck and tuner section in LBT-ZT4.
CD
Section
Model Name Using Similar Mechanism
NEW
Mechanism Type
CDM88A-K6BD93-WOD
Optical Pick-up Block Name
KSM-213DCP
Tape deck 
Section 
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
TCM-J1 or CS-21SC-900TP
AUDIO POWER SPECIFICATION
POWER OUTPUT AND TOTAL 
HARMONIC DISTORTION:
With 6 ohm loads, both channels driven, 
from 120 Hz – 10 kHz; rated 110 watts per 
channel minimum RMS power, with no 
more than 0.7% total harmonic distortion 
from 250 miliwatts to rated output.
Amplifier section
The following are measured at AC 120 V  
60 Hz
Front speaker
RMS output power (reference): 
180 W + 180 W (per channel at 6 
7,
1 kHz, 10% THD)
Subwoofer
RMS output power (reference): 180 W 
(at 6 
7, 100 Hz, 10% THD)
Inputs
AUDIO INPUT: sensitivity 
800 mV, impedance 47 kilohms
MIC: sensitivity 1 mV, impedance 
10 kilohms
 (USB) port: Type A
DMPORT
Outputs
PHONES: accepts headphones of 8 
7 or 
more
FRONT SPEAKER: accepts impedance of 
6
7
SUBWOOFER: accepts impedance of 6 
7
USB section
Supported bit rate
MP3 (MPEG 1 Audio Layer-3): 
32 – 320 kbps, VBR
WMA: 32 – 192 kbps, VBR
AAC: 48 – 320 kbps
Sampling frequencies
MP3 (MPEG 1 Audio Layer-3): 
32/44.1/48 kHz
WMA: 44.1 kHz
AAC: 44.1 kHz
Transfer speed
Full-Speed
Supported USB device
Mass Storage Class
Maximum current
500 mA
CD player section
System: Compact disc and digital audio 
system
Laser Diode Properties
Emission Duration: Continuous
Laser Output*: Less than 44.6 
MW
* 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
Tape deck section 
Recording system: 4-track 2-channel, stereo
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range:
87.5 – 108.0 MHz (100 kHz step)
Antenna: FM lead antenna
Antenna terminals: 75 ohms unbalanced
Intermediate frequency: 10.7 MHz
AM tuner section
Tuning range
530 – 1,710 kHz (with 10 kHz tuning 
interval)
531 – 1,710 kHz (with 9 kHz tuning 
interval)
Antenna: AM loop antenna, external antenna 
terminal
Intermediate frequency: 450 kHz
General
Power requirements
AC 120 V,60 Hz
Power consumption
225 W
Dimensions (w/h/d) (excl. speakers)
Approx. 231 × 361 × 437.5 mm 
(9 1/8 × 14 1/4 × 17 1/4 inch)
Mass (excl. speakers)
10.0 kg (22 lb 1 oz)
Design and specifications are subject to 
change without notice.
HCD-ZT4
2
NOTES  ON  CHIP  COMPONENT  REPLACEMENT
•  Never reuse a disconnected chip component.
•  Notice that the minus side of a tantalum capacitor may be dam-
aged 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 follow-
ing 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)
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A.  Using an AC voltmeter to check AC leakage.
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.
CAUTION
Use of controls or adjustments or performance of procedures 
other than those specifi ed herein may result in hazardous radia-
tion exposure.
HCD-ZT4
3
1. 
SERVICING  NOTES
  .............................................   4
2. GENERAL
  ..................................................................   8
3. DISASSEMBLY
3-1. Disassembly 
Flow 
...........................................................  10
3-2. Side-L/R 
Case 
.................................................................  11
3-3.  Top Panel Block ..............................................................   11
3-4.  Tape Mechanism Deck ....................................................   12
3-5.  Front Panel Block ...........................................................   12
3-6.  DC FAN (M102), Back Panel .........................................   13
3-7. MAIN 
Board 
...................................................................  13
3-8.  CD Mechanism Block .....................................................   14
3-9.  DC Fan (M101), POWERAMP Board ...........................   14
3-10. Base Unit .........................................................................   15
3-11.  OP Base Assy (KSM-213D) ...........................................   15
3-12. Belt (DLM3A) ................................................................   16
4. 
TEST  MODE 
 ............................................................   17
5. MECHANICAL 
 
ADJUSTMENTS 
 ......................   20
6. ELECTRICAL 
 
ADJUSTMENTS 
 ........................   21
7. DIAGRAMS
7-1.  Block Diagram - CD SERVO, USB Section - ................   23
7-2.  Block Diagram - MAIN Section - ...................................   24
7-3.  Block Diagram - AMP Section - .....................................   25
7-4. Block 
Diagram 
 
- PANEL, POWER SUPPLY Section - ...........................   26
7-5.  Schematic Diagram - CD Board (1/2) - ..........................   28
7-6.  Schematic Diagram - CD Board (2/2) - ..........................   29
7-7.  Printed Wiring Board - CD Board - ................................   30
7-8.  Printed Wiring Board - TC Board - .................................   31
7-9.  Schematic Diagram - TC Board - ...................................   31
TABLE  OF  CONTENTS
7-10.  Printed Wiring Board - USB Board - ..............................   32
7-11.  Schematic Diagram - USB Board - .................................   33
7-12.  Printed Wiring Board - DMPORT Board - .....................   34
7-13.  Schematic Diagram - DMPORT Board - ........................   34
7-14.  Printed Wiring Board - MAIN Board - ...........................   35
7-15.  Schematic Diagram - MAIN Board (1/4) - .....................   36
7-16.  Schematic Diagram - MAIN Board (2/4) - .....................   37
7-17.  Schematic Diagram - MAIN Board (3/4) - .....................   38
7-18.  Schematic Diagram - MAIN Board (4/4) - .....................   39
7-19.  Printed Wiring Board - POWERAMP Board - ...............   40
7-20.  Schematic Diagram - POWERAMP Board - ..................   41
7-21.  Printed Wiring Boards - JACK Section - ........................   42
7-22.  Schematic Diagram - JACK Section - ............................   42
7-23.  Printed Wiring Boards - REG Section - ..........................   43
7-24.  Schematic Diagram - REG Section - ..............................   43
7-25.  Printed Wiring Boards - DISPLAY Board - ....................   44
7-26.  Schematic Diagram - DISPLAY Board - ........................   45
7-27.  Printed Wiring Boards - PANEL Section - .....................   46
7-28.  Schematic Diagram - PANEL Section - ..........................   47
7-29.  Printed Wiring Board - TRANS2 Board - .......................   48
7-30.  Schematic Diagram - TRANS2 Board - .........................   49
8. 
EXPLODED  VIEWS
8-1. Case 
Section 
....................................................................  58
8-2.  Loading Panel Section ....................................................   59
8-3.  DISPLAY Board Section ................................................   60
8-4.  Front Panel Section .........................................................   61
8-5. Meter 
Display 
Assy 
.........................................................  62
8-6.  Top Panel Section ...........................................................   63
8-7.  Back Panel Section .........................................................   64
8-8.  MAIN Board Section ......................................................   65
8-9. Chassis 
Section 
...............................................................  66
8-10.  CD Mechanism Section (CDM88A-K6BD93-WOD) ....   67
9. 
ELECTRICAL  PARTS  LIST
  ..............................   68
HCD-ZT4
4
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 electrostat-
ic 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.
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/
1
] button to turn the power on.
2.  Press the [CD] button to select CD function.
3.  While pressing the [
x
] button, press the [
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/1]
 button.
UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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.
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Sony HCD-ZT4 / LBT-ZT4 Service Manual ▷ Download

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  • Here you can View online or download the Service Manual for the Sony HCD-ZT4 / LBT-ZT4 in PDF for free, which will help you to disassemble, recover, fix and repair Sony HCD-ZT4 / LBT-ZT4 Audio. Information contained in Sony HCD-ZT4 / LBT-ZT4 Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.