Sony HMD-M11 Service Manual

SERVICE MANUAL
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.
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.
MICROFILM
HMD-M11
Model Name Using Similar Mechanism
MD Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Tuner section
Tuning range
US, CND model
AEP, UK model
E, HK, SP, MY model
Intermediate frequency
Antenna terminals
Timer
Timer setting
Sleep timer
MINI DISC DECK/TUNER/PREAMPLIFIER
US Model
Canadian Model
AEP Model
UK Model
E Model
NEW
MDM-3C
KMS-260A/J1N
FM: 87.5 – 108 MHz
(100 kHz step)
AM: 530 – 1,710 kHz
(at 10 kHz interval)
FM: 87.5 – 108 MHz
(50 kHz step)
AM: 522 – 1,611 kHz
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)
FM: 10.7 MHz
AM: 450 kHz
FM: 75 ohm unbalanced
AM: External antenna terminal
Quartz lock system
One-minute step
10-minute step, max. 90 minutes
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