HCD-GN1200D, MHC-GN1200D - Sony Audio Service Manual (repair manual)

2008D04-1

© 

2008.04

DVD

Section

Model Name Using Similar Mechanism

HCD-GN1100D

DVD Mechanism Type

CDM74HF-DVBU101

Optical Pick-up Name

KHM-313CAB/C2NP

TAPE

Section 

Model Name Using Similar Mechanism

HCD-GN1100D

Tape Transport Mechanism Type

CWN42RR603

• HCD-GN1200D is the 

Amplifier, 

  DVD player, tape deck and tuner 
  section in MHC-GN1200D.

The following are measured at AC 120, 127, 220,
240V 50/60 Hz
Power output (rated): 130 W + 130 W
 (6 

Ω , 1 kHz, 1% THD)

RMS output power (reference)
Front speaker:  

215 W + 215 W

 

(per channel at 6 

Ω , 1 kHz, 10% THD)

Center speaker: 

85 W

 

(per channel at 6 

Ω , 1 kHz, 10%THD)

Surround speaker:  

90 W + 90 W

 

(per channel at 6 

Ω , 1 kHz, 10% THD)

Subwoofer:  

210 W (per channel at 8 

Ω , at 100 Hz, 10% THD)

Inputs
VIDEO INPUT:
 

VIDEO: 1 Vp-p, 75 ohms

 

AUDIO L/R: Voltage 250 mV, impedance 47 kilohms

TV/SAT AUDIO IN L/R:
 

Voltage 250 mV/450 mV, impedance 47 kilohms

MIC 1 or 2:
 

Sensitivity 1 mV, impedance 10 kilohms

Outputs
AUDIO OUT:
 

Voltage 250 mV, impedance 1 kilohm

VIDEO OUT:
 

Max. output level 1 Vp-p, unbalanced, Sync. negative 
load impedance 75 ohms

COMPONENT VIDEO OUT:
 

Y: 1 Vp-p, 75 ohms

 

PB/CB: 0.7 Vp-p, 75 ohms

 

PR/CR: 0.7 Vp-p, 75 ohms

S VIDEO OUT:
 

Y: 1 Vp-p, unbalanced, Sync. negative C: 0.286 Vp-p, 
load impedance 75 ohms

PHONES:
 

accepts headphones of 8 ohms or more

System
 

Compact disc and digital audio and video system

Laser
 

Semiconductor laser (DVD: 

λ =650 nm, 

 CD: 

λ = 790 nm)

 

Emission duration: continuous

Frequency response
 

DVD (PCM 48 kHz): 2 Hz – 22 kHz (±1 dB)

 

CD: 2 Hz – 20 kHz (±0.5 dB)

Video color system format
 

Latin American models: NTSC

 

Russian models: PAL

 

Other models: NTSC and PAL

Recording system
 

4-track 2-channel stereo

Frequency response
 

50 – 13,000 Hz (±3 dB), using Sony TYPE I tape

– Continued on next page –

FM stereo, FM/AM superheterodyne tuner

Tuning range
 

87.5 – 108.0 MHz (50 kHz step)

Antenna
 

FM lead antenna

Antenna terminals
 

75 ohms unbalanced

Intermediate frequency
 10.7 

MHz

Tuning range
 Saudi 

Arabian:

 

531 – 1,602 kHz (with the interval set at 9 kHz)

 Other 

models:

 

531 – 1,602 kHz (with the interval set at 9 kHz)

 

530 – 1,610 kHz (with the interval set at 10 kHz)

Antenna
 

AM loop antenna

Antenna terminals
 

External antenna terminal

Intermediate frequency
 450 

kHz

Power requirements
 

Saudi Arabian model: 120 – 127 V, 220 V or 230 – 240 V 
AC, 50/60 Hz, adjustable with voltage selector

 

Other models: 120 V, 220 V or 230 – 240 V AC, 50/60 
Hz, adjustable with voltage selector

Power consumption
 350 

W

Dimensions (w/h/d) (Approx.)
 

281 × 361 × 417 mm

Mass (Approx.)
 16.0 

kg

Design and specifi cations are subject to change without notice.

When the self-diagnosis function is activated to 
prevent the system from malfunctioning, a 
5-character service number (e.g. C 13 50) with a 
combination of a letter and 4 digits appears on 
the TV screen and the front panel display. In this 
case, check the following table.

When you turn on the system, the version 
number [VER.X.XX] (X is a number) may 
appear on the TV screen. Although this is not a 
malfunction and for Sony service use only, 
normal system operation will not be possible. 
Turn off the system, and then turn on the system 
again to operate.

C 13

This disc is dirty.

  Clean the disc with a soft cloth 

C 31

The disc is not inserted correctly.

  Restart the system, then re-insert 

the disc correctly.

E XX
(XX is a 
number)

To prevent a malfunction, the system 
has performed the self-diagnosis 
function.

  Contact your nearest Sony dealer or 

local authorized Sony service 
facility and give the 5-character 
service number.
Example: E 61 10

VER.X.XX

  .............................................   4

  ..................................................................   8

3-1. Case 

.................................................................................   8

3-2. Loading 

Panel 

.................................................................   8

3-3. Tuner 

Pack 

......................................................................   9

3-4.  DVD Mechanism Deck ...................................................   9
3-5. Front 

Panel 

Assy 

.............................................................  10

3-6.  Tape Mechanism Deck, MIC Board ...............................   10
3-7.   CD-SW Board .................................................................   11
3-8.   PANEL Board, FUNCTION Board, JOG Board ............   11
3-9.   KARAOKE Board, VIDEO Board, DMB16 Board .......   12
3-10. Back Panel ......................................................................   12
3-11.  PRIMARY Board, EFFECTOR Board ...........................   13
3-12.  Power AMP PC Board Assy, MAIN Board ....................   13
3-13.  SURROUND Board, PA Board ......................................   14
3-14.   Power Transformer (T1200) ..........................................   14
3-15.  DRIVER Board, SW Board ............................................   15
3-16.  DVD Assy .......................................................................   15
3-17.  Optical Pick-up ...............................................................   16
3-18.  SENSOR Board ..............................................................   16
3-19.  MOTOR (TB) Board.......................................................   17
3-20.  MOTOR (LD) Board ......................................................   17

TEST  MODE 

 ............................................................   18

ADJUSTMENTS 

 ......................   23

ADJUSTMENTS 

 ........................   24

7-1.  Block Diagram  – RF Section – ......................................   27
7-2.  Block Diagram – Video Section – ..................................   28
7-3.  Block Diagram – Tape/Tuner Section – ..........................   29
7-4.  Block Diagram – Main Section – ...................................   30
7-5.  Block Diagram – AMP Section – ....................................   31
7-6.  Block Diagram – Display/Power Section – ....................   32
7-7.  Printed Wiring Board – DMB16 Section (1/2) – ............   36
7-8.  Printed Wiring Board – DMB16 Section (2/2)  – ...........   37
7-9.  Schematic Diagram  – DMB16 Section (1/4)  – .............   38
7-10.  Schematic Diagram  – DMB16 Section (2/4)  – .............   39
7-11.  Schematic Diagram  – DMB16 Section (3/4)  – .............   40
7-12.  Schematic Diagram  – DMB16 Section (4/4)  – .............   41
7-13.  Printed Wiring Boards  – CD Mechanism Section – ......   42
7-14.  Schematic Diagram  – CD Mechanism Section  – ..........   43
7-15.  Printed Wiring Board – MAIN Section – .......................   44
7-16.  Schematic Diagram  – MAIN Section (1/5) – ................   45
7-17.  Schematic Diagram  – MAIN Section (2/5) – ................   46
7-18.  Schematic Diagram  – MAIN Section (3/5) – ................   47
7-19.  Schematic Diagram  – MAIN Section (4/5) – ................   48
7-20.  Schematic Diagram  – MAIN Section (5/5) – ................   49
7-21.  Printed Wiring Board – PANEL Section – ......................   50
7-22.  Schematic Diagram  – PANEL Section – .......................   51
7-23.  Printed Wiring Boards – CD-SW, JOG, FUNCTION 
 

And MIC Section – .........................................................   52

7-24.  Schematic Diagram  – CD-SW, JOG, FUNCTION 
 

And MIC Section – .........................................................   53

7-25.  Printed Wiring Board – PA Section –..............................   54
7-26.  Schematic Diagram  – PA Section – ...............................   55
7-27.  Printed Wiring Board – EFFECTOR Section – ..............   56
7-28.  Schematic Diagram  – EFFECTOR Section – ................   57
7-29.  Printed Wiring Board – VIDEO Section – ......................   58
7-30.  Schematic Diagram  – VIDEO Section – .......................   59
7-31.  Printed Wiring Board – KARAOKE Section – ..............   60
7-32.  Schematic Diagram  – KARAOKE Section – ................   61
7-33.  Printed Wiring Board – SURROUND Section – ............   62
7-34.  Schematic Diagram  – SURROUND Section (1/2) – .....   63
7-35.  Schematic Diagram  – SURROUND  Section (2/2) – ....   64
7-36.  Printed Wiring Boards – Power Section – ......................   65
7-37.  Schematic Diagram  – Power Section – ..........................   66

8-1.  Case, Back Panel Section ................................................   80
8-2.  Front Panel Section-1 ......................................................   81
8-3.  Front Panel Section-2 ......................................................   82
8-4. Chassis 

Section 

...............................................................  83

8-5.  DVD Mechanism Section-1 (CDM74HF-DVBU101) ...   84
8-6.  DVD Mechanism Section-2 (CDM74HF-DVBU101) ...   85

  ..............................   86

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.

LASER DIODE  AND  FOCUS  SEARCH  OPERATION
CHECK
Carry out the “S curve check” in “CD section adjustment” and 
check that the S curve waveform is output several times.

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)

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 viscou-s (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.

CAUTION
Use of controls or adjustments or performance of procedures other than 
those specifi ed herein may result in hazardous radiation exposure.

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.

0 OR  DOTTED  LINE  

0 ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  

This appliance is classifi ed as a 
CLASS 1 LASER product.
This marking is located on the 
rear or bottom exterior.

Iran model

3-197-993-4

[]

Saudi Arabia model

3-197-994-1

[]

Malaysia and Singapore models

3-197-996-1

[]

Philippines model

3-197-999-1

[]