Sony MDX-65 Service Manual

MDX-65

SERVICE MANUAL

Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby
Laboratories Licensing Corporation.

SPECIFICATIONS

US Model

Canadian Model

AEP Model

UK Model

E Model

Model Name Using Similar Mechanism MDX-62
Mini Disc Mechanism Type MG-798K-133
Optical Pick-up Name KMS-241A/J2N

FEATURES

System Mini disc digital audio system
Laser Diode Properties

Material: GaAlAs
Wavelength: 780 nm
Emission Duration: Continuous
Laser output Power: Less than

44.6 µW*

* This output is the value measured at a distance of

200 mm from the objective lens surface on the
Optical Pick-up Block.

Frequency response

10 – 20,000 Hz
Wow and flutter Below measurable limit
Signal-to-noise ratio

95 dB
Outputs Bus control output (8 PIN)

Analog audio output (RCA PIN)
Current drain 300 mA (MD playback)

600 mA (during loading or ejecting a

disc)
Dimensions Approx. 176 × 83.5 × 142 mm

(7 × 3 3/8 × 5 18/32 in.) (w/h/d) not incl.

projecting parts and controls
Mass Approx. 1.1 kg (2 lb. 7 oz.)
Power requirement

12 V DC car battery (negative

ground)
Supplied accessories

Mounting hardware (1 set)

Bus cable 5.5 m (1)

RCA pin cord 5.5 m (1)

• U.S. and foreign patents licensed from Dolby

Laboratories Licensing Corporation.

• Design and specifications subject to change without

notice.

• Sony BUS system compatible with mobile MD
changers.

• Direct-in system for inserting and removing
MDs easily.

• No waiting time to change discs in continuous
play.

• The MD changer compartment has a built in light
for easy use even in the dark.

• 1 bit Digital/Analog converter for high quality
sound reproduction.

MICROFILM

MINIDISC CHANGER

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SECTION 4

DIAGRAMS

4-1. IC PIN DESCRIPTIONS

• IC100 CXA2523AR (RF AMP)

Pin No. Pin Name I/O Pin Description

1 I I I-V converted RF signal input (I) from detector of optical pick-up.
2 J I I-V converted RF signal input (J) from detector of optical pick-up.
3 VC O Center voltage (+1.65 V) generation output

4 – 9 A – F I Signal input (A to F) from detector of optical pick-up.

10 PD I Quantity monitor input of light from laser diode of optical pick-up.
11 APC O Laser amplifier output to automatic power control circuit.
12 APCREF I Reference voltage input for laser power setting.
13 GND — GND
14 TEMPI I Temperature sensor connecting pin (Not used in this set.)
15 TEMPR O Reference voltage output for temperature sensor. (Not used in this set.)
16 SWDT I Write data signal input from System controller (IC600).
17 SCLK I Serial clock signal input from System controller (IC600).
18 XLAT I Serial latch signal input from System controller (IC600).
19 XSTBY I Standby signal input (“L” : Standby) (Fixed at “H” in this set.)
20 FOCNT I Center frequency control voltage input of internal circuit filter (BPF22, BPF3T and EQ).
21 VREF O Reference voltage output (Not used in this set.)
22 EQADJ I Center frequency setting input of internal circuit filter (EQ).
23 3TADJ I Center frequency setting input of internal circuit filter (BPF3T).
24 VCC — Power supply pin (+3.3 V)
25 WBLADJ I Center frequency setting input of internal circuit filter (BPF22).
26 TE O Tracking error signal output to CXD2652AR (IC200).
27 CSLED I Connecting pin for low pass filter condenser of sled error signal.
28 SE O Sled error signal output to CXD2652AR (IC200).
29 ADFM O FM signal output of ADIP.
30 ADIN I FM signal input of ADIP by AC combination.
31 ADAGC I External condenser connecting pin for AGC of ADIP.
32 ADFG O ADIP double FM signal output (22.05 kHz ± 1 kHz) to CXD2652AR (IC200).
33 AUX O Support signal (I3 signal/temperature signal) output (Not used in this set.)
34 FE O Focus error signal output to CXD2652AR (IC200).
35 ABCD O Quantity signal output of light to CXD2652AR (IC200).
36 BOTM O Bottom hold signal output of quantity signal (RF/ABCD) of light to CXD2652AR (IC200).
37 PEAK O Peak hold signal output of quantity signal (RF/ABCD) of light to CXD2652AR (IC200).
38 RF O Playback EFM RF signal output to CXD2652AR (IC200).
39 RFAGC I External condenser connecting pin of AGC circuit for RF.
40 AGCI I RF signal input by AC combination.
41 COMPO O User comparator output pin (Not used in this set.)
42 COMPP I User comparator input pin (Fixed at “L” in this set.)
43 ADDC I External condenser connecting pin for low frequency interception of ADIP amplifier.
44 OPO O External condenser connect pin for lower cut of ADIP amplifier.
45 OPN I User operational amplifier inversion input pin (Fixed at “L” in this set.)
46 RFO O RF signal output
47 MORFI I RF signal input of MO by AC combination.
48 MORFO O RF signal output of MO.

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• IC600 µPD784216GC-027-8EU (SYSTEM CONTROLLER)

Pin No. Pin Name I/O Pin Description

1 M1 O Elevator motor (M904) drive signal output
2 M1 O Elevator motor (M904) drive signal output
3 M2 O Loading motor (M903) drive signal output
4 M2 O Loading motor (M903) drive signal output
5 MDMON O Mechanism deck system power control output (“H” : Power ON)
6 LES I Loading end sensor detection switch (S902) input
7 SES I Store end sensor detection switch (S903) input
8 HOME I Home position detection switch (S901) input (“L” : Home position)

9 VDD — Power supply pin (+5 V)
10 X2 — Main system clock connecting pin (14 MHz)
11 X1 — Main system clock connecting pin (14 MHz)
12 VSS — GND
13 XT2 — Sub system clock connecting pin (32.768 kHz)
14 XT1 — Sub system clock connecting pin (32.768 kHz)
15 RESET — System reset input
16 BU IN I Backup OFF detection input (“L” : Backup OFF)
17 BUS ON I BUS OFF detection of SONY BUS. (“H” : BUS OFF)
18 SQ SY I Sub code Q sync input from CXD2652AR (IC200).
19 STR SW I STOP switch (S600) input
20 — O Not used.
21 CC XINT I Interruption status input from CXD2652AR (IC200).
22 — O Not used.
23 AVDD — Power supply for A/D converter. (+5 V)
24 AVREF0 — Reference voltage for A/D converter.
25 INIT I Initial input pin at reset.
26 TEMP I Thermistor connecting pin for temperature detection.
27 EHS I Elevator height position detection input

28, 29 — I Connect to GND.

30 – 32 — O Connect to GND.

33 AVSS — Analog GND
34 ERR PWM O Error data output (Not used in this set.)
35 — O Not used.
36 AVREF1 — Reference voltage for D/A converter.

37, 38 — O Not used.

39 — — Not used.
40 MD SI I Read data signal input from CXD2652AR (IC200).
41 MD SO O Write data signal output to CXA2523AR (IC100) and CXD2652AR (IC200).
42 MD CKO O Serial clock signal output to CXA2523AR (IC100) and CXD2652AR (IC200).
43 — O Not used.
44 — — Not used.
45 UNISI I Serial data input for SONY BUS.
46 UNISO O Serial data output for SONY BUS.
47 UNI CKI I Serial clock input for SONY BUS.
48 LINKOFF O Link control signal output for SONY BUS. (“H” : Link OFF)
49 — O Not used.
50 — I Not used.

51, 52 D-BASS1, 2 O Digital D-BASS select output 1, 2 (Not used in this set.)
53 – 55 — O Not used.
56 – 59 MNT0 – 3 O Monitor 0 – 3 signal input from CXD2652AR (IC200).

60 AGING O Not used.
61 AGCHK O Not used.
62 TFTON O Not used.

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Pin No. Pin Name I/O Pin Description

63 — O Not used.
64 EE CS O Chip select output to EEPROM. (Not used in this set.)
65 EE CKO O Serial clock output to EEPROM. (Not used in this set.)
66 EE SIO I/O Data input from/output to EEPROM. (Not used in this set.)
67 SENS I Internal status input from CXD2652AR (IC200).
68 LIMIT SW I Optical pick-up innermost track limit position detection switch (S400) input
69 DOORSW I Front door open detection switch (S620) input (“L” : Open complete)
70 MD LAT O Serial latch signal output to CXA2523AR (IC100) and CXD2652AR (IC200).
71 MD RST O Reset signal output to CXD2652AR (IC200).
72 VSS — GND
73 MD ON O Servo system power control output (“H” : Power ON)
74 EMPH O O De-emphasis circuit control output (“H” : De-emphasis ON)
75 A ATT I Analog mute control input (“H” : Mute ON)
76 ILLON O Illumination lamp (PL620) light-up control output (“H” : Lamp light-up)
77 TSTSMD I Single mode setting pin (“L” : Single mode)
78 TSTCKO O Serial clock output to LED for TEST mode display. (Not used in this set.)
79 TSTSO O Serial data output to LED for TEST mode display. (Not used in this set.)
80 TSTMOD I TEST mode setting pin (“L” : TEST mode)
81 VDD — Power supply pin (+5 V)

82 – 85 TSTOUT0 – 3 O TEST key output pin of 4 × 8 matrix. (Not used in this set.)
86 – 93 TSTIN0 – 7 I TEST key input pin of 4 × 8 matrix. (Not used in this set.)

94 TEST/VPP — Fixed at “L” in this set.
95 DCS1 I Disc with/without detection 1 switch (S611) input (“H” : with disc)
96 DCS2 I Disc with/without detection 2 switch (S612) input (“H” : with disc)
97 DCS3 I Disc with/without detection 3 switch (S613) input (“H” : with disc)
98 DCS4 I Disc with/without detection 4 switch (S614) input (“H” : with disc)
99 DCS5 I Disc with/without detection 5 switch (S615) input (“H” : with disc)

100 DCS6 I Disc with/without detection 6 switch (S616) input (“H” : with disc)

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