Sony hmd-m11 User manual

MICROFILM
HMD-M11
US Model
Canadian Model
AEP Model
UK Model
E Model
SERVICE MANUAL
MINI DISC DECK/TUNER/PREAMPLIFIER
Model Name Using Similar Mechanism NEW
MD Mechanism Type MDM-3C
Optical Pick-up Name KMS-260A/J1N
HMD-M11 is the mini disc deck,
tuner and preamplifier section
in CMT-M11C.
U.S and foreign patents licensed from Dolby Labora-
tories Licensing Corporation.
SPECIFICATIONS
MiniDisc deck section
System MiniDisc digital audio system
Disc MiniDisc
Laser Semiconductor laser (λ= 780 nm)
Laser output power Less than 44.6 mW*
* This output is the value measured at a distance of 200 mm from the ob-
jective lens surface on the optical pick-up block with 7 mm aperture.
Laser diode properties Material: GaAlAs
Revolutions (CLV) Approx. 400 rpm to 900 rpm
Error correction Advanced Cross
Interleave Reed Solomon Code (ACIRC)
Sampling frequency 44.1 kHz
Modulation system EFM (Eight-to-Fourteen Modulation)
Number of channels 2 stereo channels
Frequency response 20 to 20,000 Hz ± 0.5 dB
Signal-to-noise ratio Over 92 dB (during playback)
Wow and flutter Below measurable limit
Inputs DIGITAL IN (CD OPTICAL IN):
Square optical connector jack, impedance opti-
cal wave length 660 nm.
Tuner section
Tuning range
US, CND model FM: 87.5 – 108 MHz
(100 kHz step)
AM: 530 – 1,710 kHz
(at 10 kHz interval)
AEP, UK model FM: 87.5 – 108 MHz
(50 kHz step)
AM: 522 – 1,611 kHz
E, HK, SP, MY model FM: 87.5 – 108 MHz
(50 kHz step)
AM: 531 – 1,602 kHz
(at 9 kHz interval)
530 – 1,710 kHz
(at 10 kHz interval)
Intermediate frequency FM: 10.7 MHz
AM: 450 kHz
Antenna terminals FM: 75 ohm unbalanced
AM: External antenna terminal
Timer Quartz lock system
Timer setting One-minute step
Sleep timer 10-minute step, max. 90 minutes
– Continued on next page –

– 2 –
Preamplifier section
Inputs TAPE IN jack:
Stereo phone jacks, sensitivity 220 mV, imped-
ance 47 kilohms
Outputs OUTPUT jack:
Stereo phone jacks, 1 V, 1 kilohm
TAPE OUT jack:
Stereo phone jacks, 1 V, 1 kilohm
PHONES (headphones) jack:
Stereo mini jack, accepts headphones of 8 ohms
or more.
General
Power requirements
US, CND model 120 V AC, 60 Hz
AEP, UK model 220 – 230 V AC, 50/60 Hz
E, HK, SP, MY model 120 V or 220 – 240 V AC, 50/60 Hz adjustable
with voltage selector
Power consumption
US, CND model 19 W
Except US, CND model 20 W
Dimensions Approx. 142 ×125 ×256 mm (w/h/d)
(5 5/8×5 ×10 inches) incl. projecting parts and
controls
Mass Approx. 3.3 kg (6 lb 10 oz)
Design and specifications are subject to change without notice.
•Abbreviation
CND : Canadian
HK : Hong Kong
MY : Malaysia
SP : Singapore
TABLE OF CONTENTS
1. SERVICING NOTES
1-1. Check Mode of Fluorescent Indicator Tube,
Buttons, and LED’s ........................................................ 5
1-2. Check Mode of Amplifier Section.................................. 5
1-3. Extension Cable.............................................................. 5
1-4. Aging Mode.................................................................... 5
2. GENERAL .................................................................. 6
3. DISASSEMBLY ........................................................ 23
4. TEST MODE
4-1. Precautions for Use of Test Mode .................................. 30
4-2. Setting the Test Mode ..................................................... 30
4-3. Releasing the Test Mode ................................................ 30
4-4. Basic Operations of the Test Mode ................................ 30
4-5. Selecting the Test Mode ................................................. 30
4-6. Operating the Continuous Playback Mode..................... 31
4-7. Operating the Continuous Recording Mode................... 31
4-8. EEP Mode....................................................................... 32
4-9. Functions of Other Buttons ............................................ 32
4-10. Test Mode Displays ........................................................ 32
4-11. Meanings of Other Displays ........................................... 32
5. ELECTRICAL ADJUSTMENTS
5-1. Precautions for Checking Laser Diode Emission ........... 33
5-2. Precautions for Use of Optical Pick-up (KMS-260A) ... 33
5-3. Precautions for Adjustments........................................... 33
5-4. Creating MO Continuously Recorded Disc.................... 33
5-5. Temperature Compensation Offset Adjustment ............. 34
5-6. Laser Power Adjustment................................................. 34
5-7. Traverse (E-F Balance) Adjustment ............................... 35
5-8. Focus Bias Adjustment ................................................... 36
5-9. Error Rate Check ............................................................ 36
5-10. Focus Bias Check ........................................................... 36
5-11. Adjusting Points and Connecting Points ........................ 37
6. DIAGRAMS
6-1. Block Diagram (1/3)....................................................... 39
6-2. Block Diagram (2/3)....................................................... 41
6-3. Block Diagram (3/3)....................................................... 43
6-4. Printed Wiring Boards
– MD MECHANISM DECK Section – ......................... 48
6-5. Schematic Diagram
– MD MECHANISM DECK Section – ......................... 51
6-6. Schematic Diagram – MECHANISM CONTROL,
A/D, D/A CONVERTER Section – ............................... 56
6-7. Printed Wiring Boards – MECHANISM CONTROL,
A/D, D/A CONVERTER Section – ............................... 61
6-8. Printed Wiring Board – AUDIO/TUNER Section –...... 63
6-9. Schematic Diagram – AUDIO/TUNER Section – ......... 65
6-10. Schematic Diagram
– MASTER CONTROL, POWER SUPPLY Section –.. 69
6-11. Printed Wiring Boards
– MASTER CONTROL, POWER SUPPLY Section –.. 73
6-12. Schematic Diagram —DISPLAY Section— .................. 76
6-13. Printed Wiring Boards —DISPLAY Section—.............. 79
6-14. IC Pin Function Description ........................................... 85
7. EXPLODEDVIEWS ................................................ 96
8. ELECTRICAL PARTS LIST .................................100

– 3 –
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 microampers.).
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” indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2VAC range are suit-
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µ FAC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !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 PUB-
LISHED BY SONY.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may
result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
MODEL IDENTIFICATION
– Specification Label –
MODEL NO. HMD-M11
TUNER MINIDISC DECK
SERIAL No.
MADE IN JAPAN
US, Canadian model:
AC:120V 60 Hz 19 W
AEP, UK model:
AC:220 – 230 V
⁄ 50/60 Hz 20 W
E, Hong Kong, Singapore, Malaysia model:
AC:120 V/220 – 240 V
⁄ 50/60 Hz 20 W

– 4 –
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static 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 flexible 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 reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
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 the soldering iron around 270 ˚C dur-
ing 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.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type recommended by
the manufacturer.
Discard used batteries according to the manufacturer’s instructions.
ADVARSEL!
Lithiumbatteri-Eksplosionsfare ved fejlagtig håndtering.
Udskiftning må kun ske med batteri
af samme fabrikat og type.
Levér det brugte batteri tilbage til leverandøren.
ADVARSEL
Eksplosjonsfare ved feilaktig skifte av batteri.
Benytt samme batteritype eller en tilsvarende type
anbefalt av apparatfabrikanten.
Brukte batterier kasseres i henhold til fabrikantens
instruksjoner.
VARNING
Explosionsfara vid felaktigt batteribyte.
Använd samma batterityp eller en likvärdig typ som
rekommenderas av apparattillverkaren.
Kassera använt batteri enligt gällande föreskrifter.
VAROITUS
Paristo voi räjähtää, jos se on virheellisesti asennettu.
Vaihda paristo ainoastaan laitevalmistajan suosittelemaan tyyppiin.
Hävitä käytetty paristo valmistajan ohjeiden mukaisesti.

– 5 –
1-1. CHECK MODE OF FLUORESCENT INDICATOR
TUBE, BUTTONS, AND LED’S
Setting the Check Mode:
Thismode is activatedif pressing =0buttonand DISPLAY
button simultaneously with the power supply to the set in OFF
(standby) status. When this mode started, the fluorescent indica-
tor tube and LEDs are all turned on.
1-1-1. Check Mode of Fluorescent IndicatorTube
The display changes in three ways each time the YES button is
pressed.
When POWER button is pressed, the set becomes ready for nor-
mal operation.
When POWER button is pressed, the set becomes ready for nor-
mal operation.
1-2. CHECK MODE OF AMPLIFIER SECTION
Setting the Check Mode:
This mode is activated if pressing FUNCTION button
and YES button simultaneously with the power supply to the set
in ON status. When this mode started, the display will be as shown
below.
US, Canadian models: U/CA
AEP, UK models: AE4
E, Hong Kong, Singapore, Malaysia models: E
Table 1-1. Operation of Check Mode
Button Display Operation
VOL + Volume 0dB Volume control maximum
VOL – Volume — — dB Volume control minimum
)+ 10 RIGHT Balance control (right side)
maximum
=0 10 LEFT Balance control (left side)
maximum
pDestination
indication Volume control maximum, balance control center
Releasing the Check Mode:
When POWER button is pressed, the set becomes ready for nor-
mal operation.
1-3. EXTENSION CABLE
In performing a repair of this set, etc., connect the CN103 on BD
board with the CN100 on DIGITAL board using as extension cable
(Parts No.: J-2501-094-A).
1-1-2. Check Mode of Buttons
In the fluorescent indicator tube check mode, press the NO but-
ton, and the buttons check mode is activated.
When this mode started, the display will be as shown below.
MDK= 0
CDK=OK
At this display, each time respective buttons (total 16 pcs.) are
pressed, MDK values on the display are counted up, and
“MDK=OK” is displayed when all buttons are pressed. If any
button is pressed when “MDK=OK”, the set becomes ready for
normal operation.
1-1-3. Check Mode of LED’s
In the fluorescent indicator tube check mode, each time
=0button or )+button is pressed, each LED turns
on as shown below.
All lights
up Bride-1 indicate Bride-2 indicate
All lights
up PLAY
(green) PAUSE
(amber) REC CD SYNC
TA Test Deffers according to
the destination.
SECTION 1
SERVICING NOTES
– BD board (Conductor side) –
Extension cable (J-2501-094-A)
CN103
CN100
– DIGITAL board (Component side) –
1-4. AGING MODE
For the AGING MODE, refer to the CMT-M11C service manual
(Parts No.: 9-960-794-11).

– 6 –
SECTION 2
GENERAL
This section is extracted
from instruction manual.

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