Sony SS-CM90 User manual

SERVICE MANUAL
Ver 1.1 2002.11
MICRO Hi-Fi COMPONENT SYSTEM
CMT-M90DVD
CMT-M90DVD
DVD DECK RECEIVER HCD-M90
SPEAKER SYSTEM SS-CM90
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
SPECIFICATIONS
•CMT-M90DVD is composed of following models.
As service manuals are issued for each component model,
please refer to them.
COMPONENT MODEL NAME
1-477-241-11 REMOTE COMMANDER (RM-SM90)
1-501-594-43 ANTENNA (FM) (CH)
1-501-659-62 ANTENNA (FM) (US, CND, SP)
01-569-008-12 ADAPTOR, CONVERSION 2P (SP)
1-769-108-11 CORD, CONNECTION (VIDEO CABLE)
1-754-060-13 ANTENNA (FM) (AEP, UK, AUS)
1-754-094-12 ANTENNA, LOOP (AM) (CH)
1-754-149-11 ANTENNA, LOOP (AM) (EXCEPT CH)
4-232-032-01 COVER, BATTERY (for RM-SM90)
4-239-826-12 MANUAL, INSTRUCTION (ENGLISH) (EXCEPT CH)
4-239-826-22 MANUAL, INSTRUCTION (FRENCH, SPANISH)
(AEP, SP)
4-239-826-32 MANUAL, INSTRUCTION (FRENCH) (US, CND)
4-239-826-42 MANUAL, INSTRUCTION
(GERMAN, DUTCH, ITALIAN) (AEP)
4-239-826-52 MANUAL, INSTRUCTION (SWEDISH, POLISH) (AEP)
4-239-826-62 MANUAL, INSTRUCTION (TRADITIONAL CHINESE)
(SP)
4-239-828-11 MANUAL, INSTRUCTION (GREEK) (AEP)
4-239-828-21 MANUAL, INSTRUCTION (HUNGARIAN, CZECH)
(AEP)
4-239-828-31 MANUAL, INSTRUCTION (TURKISH) (AEP)
4-239-828-41 MANUAL, INSTRUCTION (SLOVAKIAN) (AEP)
4-240-859-12 MANUAL, INSTRUCTION (DANISH, FINNISH) (AEP)
4-242-689-11 MANUAL, INSTRUCTION
(ENGLISH, SIMPLIFIED CHINESE) (CH)
ACCESSORIES
Part No. Description Remark
9-873-990-02 Sony Corporation
2002K0500-1 Home Audio Company
C2002.11 Published by Sony Engineering Corporation
•Abbreviation
AUS:Australian model
CH : Chinese model
SP : Singapore model
The components identified by
mark 0or dotted line with
mark 0are critical for safety.
Replace only with part num-
ber specified.
Les composants identifiés par une
marque 0sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Australian model: 230 V AC, 50/60 Hz
Chinese model: 220 V AC, 50/60 Hz
Other models: 110 −120 V or
220 −240 V AC,
50/60 Hz
Adjustable with voltage
selector
Power consumption
European model: see the name plate
0.3 watts (at the Power
Saving mode)
Other models: see the name plate
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/DVD section:
Approx. 159 ×217 ×
335 mm
Speaker: Approx. 140 ×217 ×
226 mm
Mass
Amplifier/Tuner/Tape/DVD section:
Approx. 5.7 kg
Speakers: Approx. 2.4 kg net per
speaker
Supplied accessories Remote (1)
R6 (size AA) batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Video cable (1)
Design and specifications are subject to change
without notice.

SERVICE MANUAL
DVD DECK RECEIVER
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Chinese Model
SPECIFICATIONS
HCD-M90
Ver 1.4 2004.09
9-873-991-05 Sony Corporation
2004I05-1 Personal Audio Company
© 2004.09 Published by Sony Engineering Corporation
HCD-M90 is the Amplifier, DVD player, Tape
Deck and Tuner section in CMT-M90DVD.
Model Name Using Similar Mechanism NEW
DVD DVD Mechanism Type CDM55D-DVBU8B
Section Base Unit Name DVBU8B
Optical Pick-up Name KHM-240AAA (TYPE A)
KHM-270AAA (TYPE B)
TAPE Model Name Using Similar Mechanism HCD-M70
Section
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6-ohm loads, both channels driven, from
70 - 20,000 Hz; rated 18 watts per channel
minimum RMS power, with no more than 0.9%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 12 W)
European, Chinese models:
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
40 + 40 W
Other models:
The following measured at 230 V AC, 60 Hz
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
18 + 18 W
(6 ohms at 1 kHz, 10%
THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 12 + 12 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
AUDIO IN MD (VIDEO) (phono jacks):
Sensitivity 500/250 mV,
impedance 47 kilohms
Outputs
VIDEO OUT: max. output level
(phono jack) 1 Vp-p, unbalanced,Sync
negative, load impedance
75 ohms
S-VIDEO OUT: Y: 1 Vp-p, unbalanced,
(4-pin/mini-DIN jack) Sync negative,
C: 0.286Vp-p,
load impedance 75 ohms
OPTICAL OUT: Optical
Wavelength: 660 nm
PHONES: Accepts headphones with
an impedance of 8 ohms
or more
SPEAKER: accepts impedance of 6 to
16 ohms.
DVD player section
Laser Semiconductor laser
(DVD: λ=650 nm,
CD: λ=780 nm)
Emission duration:
continuous
Frequency response DVD (PCM 48 kHz):
2 Hz – 22 kHz = (±1 dB)
CD: 2 Hz – 20 kHz =
(±1 dB)
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
Video color system format NTSC, PAL
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
– Continued on next page –

2
HCD-M90
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model: 87.5 - 108.0 MHz
(100-kHz step)
Other models: 87.5 - 108.0 MHz
(50-kHz step)
Antenna FM wire antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Pan American model: 530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model: 531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models: 530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz
General
Power requirements
North American model: 120 V AC, 60 Hz
European model: 230 V AC, 50/60 Hz
Australian model: 230 V AC, 50/60 Hz
Chinese model: 220 V AC, 50/60 Hz
Other models: 110 – 120 V or
220 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector
Power consumption
European model: see the name plate
0.3 watts (at the Power
Saving mode)
Other models: see the name plate
Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/DVD section:
Approx. 159 ×217 ×
335 mm
Mass
Amplifier/Tuner/Tape/DVD section:
Approx. 5.7 kg
Design and specifications are subject to change
without notice.
Ver 1.3

3
HCD-M90
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous ra-
diation 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 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.
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
TheAC 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 dropacross a resistorby meansofaVOM
or battery-operatedAC 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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2VAC range are suitable. (See Fig.A)
Fig. A. Using an AC voltmeter to check AC leakage.
1.5 k Ω 0.15 µFAC
voltmete
r
(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 0
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 0OR DOTTED
LINE WITH MARK 0ON 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.
This appliance is
classified as a CLASS 1
LASER product. This
label is located on the
rear exterior.
The following caution label is located inside the
apparatus.
This label is located inside the unit.
Ver 1.3

4
HCD-M90
1. SERVICING NOTES ............................................... 5
2. GENERAL ................................................................... 9
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 10
3-2. Side Panel (L), Side Panel (R) ........................................ 11
3-3. Top Panel Section............................................................ 11
3-4. Mechanical Deck (Tape) ................................................. 12
3-5. Front Panel Section ......................................................... 12
3-6. Back Panel Assy.............................................................. 13
3-7. MAIN Board ................................................................... 13
3-8. CONTROL Board, Noise Shield Case ........................... 14
3-9. DAC Board ...................................................................... 14
3-10. DVD Board...................................................................... 15
3-11. Mechanism Deck (CDM55D-DVBU8B) ....................... 15
3-12. LOADING Board, Motor (LD) Assy (M901) ................ 16
3-13. RF-240 Board.................................................................. 16
3-14. Tray.................................................................................. 17
3-15. Optical Device................................................................. 17
4. TEST MODE.............................................................. 18
5. ELECTRICAL ADJUSTMENTS
DVD Section ................................................................... 27
Deck Section ................................................................... 28
6. DIAGRAMS
6-1. Block Diagram – DVD SERVO Section – .................... 29
6-2. Block Diagram – DVD MAIN Section (1/2) – ............. 30
6-3. Block Diagram – DVD MAIN Section (2/2) – ............. 31
6-4. Block Diagram – TUNER/TAPE DECK Section – ...... 32
6-5. Block Diagram – AUDIO Section – .............................. 33
6-6. Block Diagram
– KEY CONTROL/POWER SUPPLY Section –........... 34
6-7. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 35
6-8. Printed Wiring Board – RF-240 Board (Suffix-11) – ... 36
6-9. Schematic Diagram – RF-240 Board (Suffix-11) – ...... 37
6-10. Printed Wiring Board – RF-240 Board (Suffix-22) – ... 38
6-11. Schematic Diagram – RF-240 Board (Suffix-22) – ...... 39
6-12. Printed Wiring Boards
– DVD (Side A) (Suffix-21)/LOADING Boards – ........ 40
6-13. Printed Wiring Board
– DVD Board (Side B) (Suffix-21) –.............................. 41
6-14. Schematic Diagram
– DVD (1/7) (Suffix-21)/LOADING Boards – .............. 42
6-15. Schematic Diagram
– DVD Board (2/7) (Suffix-21) – ................................... 43
6-16. Schematic Diagram
– DVD Board (3/7) (Suffix-21) – ................................... 44
6-17. Schematic Diagram
– DVD Board (4/7) (Suffix-21) – ................................... 45
6-18. Schematic Diagram
– DVD Board (5/7) (Suffix-21) – ................................... 46
6-19. Schematic Diagram
– DVD Board (6/7) (Suffix-21) – .................................. 47
6-20. Schematic Diagram
– DVD Board (7/7) (Suffix-21) – .................................. 48
6-21. Schematic Diagram
– DVD (1/7) (Suffix-22)/LOADING Boards – .............. 49
6-22. Schematic Diagram
– DVD Board (2/7) (Suffix-22) – ................................... 50
6-23. Schematic Diagram
– DVD Board (3/7) (Suffix-22) – ................................... 51
TABLE OF CONTENTS
6-24. Schematic Diagram
– DVD Board (4/7) (Suffix-22) – ................................... 52
6-25. Schematic Diagram
– DVD Board (5/7) (Suffix-22) – ................................... 53
6-26. Schematic Diagram
– DVD Board (6/7) (Suffix-22) – .................................. 54
6-27. Schematic Diagram
– DVD Board (7/7) (Suffix-22) – .................................. 55
6-28. Printed Wiring Boards
– DVD (Side A) (Suffix-22)/LOADING Boards – ........ 56
6-29. Printed Wiring Board
– DVD Board (Side B) (Suffix-22) –.............................. 57
6-30. Printed Wiring Board – DAC Board –........................... 58
6-31. Schematic Diagram – DAC Board –.............................. 59
6-32. Printed Wiring Board – TC Board (Suffix-12) –........... 60
6-33. Schematic Diagram – TC Board (Suffix-12) – ............. 61
6-34. Printed Wiring Board – TC Board (Suffix-32) –........... 62
6-35. Schematic Diagram – TC Board (Suffix-32) – ............. 63
6-36. Schematic Diagram
– MAIN Board (1/2) (Suffix-14) – ................................. 64
6-37. Schematic Diagram – MAIN (2/2) (Suffix-14)/
JACK (Suffix-11) Boards –............................................. 65
6-38. Printed Wiring Boards
– MAIN (Suffix-14)/JACK (Suffix-11) Boards – .......... 66
6-39. Printed Wiring Boards
– MAIN (Suffix-16)/JACK (Suffix-12) Boards – .......... 67
6-40. Schematic Diagram
– MAIN (1/2) Board (Suffix-16) – ................................. 68
6-41. Schematic Diagram – MAIN (2/2) (Suffix-16)/
JACK (Suffix-12) Boards –............................................. 69
6-42. Printed Wiring Boards
– CONTROL (Suffix-11)/VIDEO Boards –................... 70
6-43. Schematic Diagram
– CONTROL (Suffix-11)/VIDEO Boards –................... 71
6-44. Printed Wiring Boards
– CONTROL (Suffix-12)/VIDEO Boards –................... 72
6-45. Schematic Diagram
– CONTROL (Suffix-12)/VIDEO Boards –................... 73
6-46. Printed Wiring Board
– SWITCH Board (Suffix-11) – ..................................... 74
6-47. Schematic Diagram – SWITCH Board (Suffix-11) – ... 75
6-48. Printed Wiring Board
– SWITCH Board (Suffix-12) – ..................................... 76
6-49. Schematic Diagram – SWITCH Board (Suffix-12) – ... 77
6-50. Printed Wiring Board
– POWER Board (Suffix-11) – ....................................... 78
6-51. Schematic Diagram – POWER Board (Suffix-11) –..... 79
6-52. Printed Wiring Board
– POWER Board (Suffix-12, -21) – ............................... 80
6-53. Schematic Diagram
– POWER Board (Suffix-12, -21) – .............................. 81
6-54. IC Pin Function Description ........................................... 88
7. EXPLODED VIEWS
7-1. Panel (Side) Section ........................................................ 99
7-2. Front Panel Section ........................................................ 100
7-3. Top Panel Section........................................................... 101
7-4. Chassis Section-1 ........................................................... 102
7-5. Chassis Section-2 ........................................................... 103
7-6. Chassis Section-3 ........................................................... 104
7-7. Mechanism Deck Section (CDM55D-DVBU8B) ......... 105
7-8. Base Unit Section (DVBU8B) ....................................... 106
8. ELECTRICAL PARTS LIST ..............................107
Ver 1.3

5
HCD-M90
SECTION 1
SERVICING NOTES
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 HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
MODEL IDENTIFICATION
– Back Panel –
SERVICE POSITION
In checking the control board, prepare jig (extension cable J-2501-
219-B: 1.00 mm Pitch, 10 cores, Length 300 mm).
Part No.
In checking the tape deck section, prepare jig (extension cable J-
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
Model Name Part No.
AEP and UK models 4-239-822-0[]
US and Canadian models 4-239-823-0[]
Singapore model 4-239-824-0[]
Australian model 4-240-899-0[]
Chinese model 4-242-690-0[]
Connect jig (extension cable J-2501-219-B)
to the control board (CN507) and DVD board (CN101).
control board (CN008)
DVD board (CN008)
TC board (CN301)
main board (CN301)
Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).
RELEASING THE DISC TRAY LOCK
The disc tray lock function for the antitheft of an demonstration
disc in the store is equipped.
Releasing Procedure :
While pressing the xkey, press the [ DVD] key. The message
“UNLOCKED” is displayed and the tray is unlocked.
Note: When “LOCKED” is displayed, the tray lock is not released by
turning power on/off with the I/1button.
Ver 1.3
Z

6
HCD-M90
Ver 1.3
NEW/FORMER DISCRIMINATION
In this set, RF-240, DVD, TC, MAIN, JACK, CONTROL,
SWITCH and POWER boards have been changed in the midway
of production.
Note: Chinese model is produced only with the new boards.
– RF-240 BOARD (Side A) –
Former : 1-681-879-11
New : 1-681-879-22
– DVD BOARD (Side B) –
Former : 1-684-516-21
New : 1-684-516-22
–TC BOARD (Component Side) –
Former : 1-684-172-12
New : 1-684-172-32

7
HCD-M90
Ver 1.3
– MAIN BOARD (Component Side) –
Former: 1-684-232-14
New : 1-684-232-16
– JACK BOARD (Component Side) –
Former: 1-685-428-11
New : 1-685-428-12
– CONTROL BOARD (Component Side) –
Former : 1-685-427-11
New : 1-685-427-12

8
HCD-M90
Ver 1.4
– SWITCH BOARD (Component Side) –
Former : 1-685-426-11
New : 1-685-426-12
– POWER BOARD (Component Side) –
Former : 1-685-429-11
New : 1-685-429-12, -21
SILVER: KHM-240AAA (TYPE A)
BLACK:KHM-270AAA (TYPE B)
optical device
TYPE A/B DISCRIMINATION
NOTE OF REPLACING THE DVD BOARD
When replacing the DVD board, since the adjustment value is not
set up correctly, “Drive Auto Adjustment” can’t be performed.
In this case, initialize Memory in the following procedures.
Procedure:
1. Set the test mode. (See page 18)
2. Press the [2] key of the remote commander, and set the “DRIVE
MANUAL OPERATION”. (See page 23)
3. Press the [6] key of the remote commander, and set the “2-6,
Memory Check”. (See page 25)
4. Press the [CLEAR] key of the remote commander, and initial-
ize Memory.

9
HCD-M90
SECTION 2
GENERAL This section is extracted from
instruction manual.
Main unit
ALPHABETICAL ORDER
A – F
CD SYNCHRO qa
CD SYNCHRO indicator w;
DIRECTION 0
Disc tray 9
Display window 2
DSG qk
DVD N7
DVD X7
FUNCTION ql
PHONES jack qf
PLAY MODE/TUNING MODE
qd
Remote sensor 4
REPEAT/FM MODE qs
TAPE nN qj
TAPE Xqj
TUNER AM qg
TUNER FM qg
TUNING +/– 3
VOLUME +/– 6
P – V
?/1 (power) 1
m/M 3
l/L 3
x5
ZDVD 8
zREC qh
Z
x
nN N
?/1
lm
ML
z
XX
1
3
5
ql
6
7
4
8
9
2
0qaqsqdqf
qh
qg
qk
qj
w;
BUTTON DESCRIPTIONS
Remote Control
ANGLE ea
AUDIO ed
BASS/TREBLE 3
CLEAR ql
CLOCK/TIMER SELECT ws
CLOCK/TIMER SET wa
CURSOR T/t5
DISPLAY qg
DSG 2
DVD DISPLAY qs
DVD MENU 0
DVD TOP MENU qf
DVD SETUP ef
DVD N/SELECT qj
DVD Xqj
DVD xqj
DVD ./> 7
DVD t/ T 8
ENTER/YES w;
FUNCTION qh
Numeric buttons wh
PLAY MODE/TUNING MODE
wk
REPEAT/FM MODE wl
RETURN Oqa
SCROLL eg
SLEEP wd
SUBTITLE e;
TAPE nN qk
TAPE Xqk
TAPE xqk
TAPE m/M 6
TUNER BAND eh
TUNER +/– wj
TUNING MEMORY ej
TV `/1 wf
TV CH +/– wg
TV VOL +/– ek
TV VIDEO r;
VES 9
VOL +/– es
WIDE el
`/1 (power) 1
V/v/B/b/ENTER qd
+/– 4
ALPHABETICAL ORDER
A – E F – W
BUTTON DESCRIPTIONS
+
+
–
–
++
––
1
2
3
4
5
7
6
8
9
0
qaqs
qd
qf
qg
qh
qj
qk
ql
w;
ws
wa
wd
+
+
–
–
++
––
wf
wg
wh
wk
wl
e;
ea
ef
r;
el
ek
ej
eh
wj
eg
ed
es
Setting the clock
1 Press ?/1 to turn on the system.
2 Press CLOCK/TIMER SET on the
remote.
3 Press + or — on the remote repeatedly
to set the hour.
4 Press ENTER/YES or CURSORton
the remote.
5 Press + or — on the remote repeatedly
to set the minute.
6 Press ENTER/YES on the remote.
The clock starts working.
To adjust the clock
1 Press CLOCK/TIMER SET on the remote.
2 Press + or —on the remote to select CLOCK
SET?, then press ENTER/YES on the
remote.
3 Do the same procedures as step 3 to 6 above.

HCD-M90
10
SET
3-2. SIDE PANEL (L),
SIDE PANEL (R)
(page 11)
3-3. TOP PANEL SECTION
(page 11)
3-4. MECHANICAL DECK (TAPE)
(page 12) 3-5. FRONT PANEL SECTION
(page 12)
3-6. BACK PANEL ASSY
(page 13)
3-13.RF-240 BOARD
(page 16) 3-14.TRAY
(page 17)
3-15.OPTICAL DEVICE
(page 17)
3-12.LOADING BOARD,
MOTOR (LD) ASSY (M901)
(page 16)
3-7. MAIN BOARD
(page 13)
3-8. CONTROL BOARD,
NOISE SHIELD CASE
(page 14)
3-9. DAC BOARD
(page 14)
3-10.DVD BOARD
(page 15)
3-11.MECHANISM DECK
(CDM55D-DVBU8B)
(page 15)
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY

HCD-M90
11
Note: Follow the disassembly procedure in the numerical order given.
3-2. SIDE PANEL (L), SIDE PANEL (R)
3-3. TOP PANEL SECTION
1 four screws
(BTP3
× 10)
2
3 side panel (L)
1 screw
(BTP3
× 10)
4 screw
(BTP3
× 10)
4 four screws
(BTP3
× 10)
5
6 side panel (R)
3 wire (flat type) (17 core)
(CN301)
4 top panel section
1 screw
(BTP3 × 10
)
2

HCD-M90
12
3-4. MECHANICAL DECK (TAPE)
3-5. FRONT PANEL SECTION
3 shield case (TC)
5 connector
1 two screws
(BVTP3 × 8)
qs MD bracket (R
)
qa two screws
(BVTT2.6 × 5)
6 screw
(BVTT2.6 × 5)
7
6 two screws
(BVTT2.6 × 5)
1 two screws
(BVTP3 × 8)
9 two screws
(BVTT2.6 × 5)
qd mechanical deck
(tape)
2
0 MD bracket (L)
4 wire (flat type) (EEC) (8 core)
8 TC board
1 wire (flat type) (FFC) (21 core) (CN801)
3 lead (with connector)
2 connector
(CN304)
4 three screws
(BTP3
× 8)
5 front panel section

HCD-M90
13
3-6. BACK PANEL ASSY
3-7. MAIN BOARD
1 two connectors
(CN802, CN809)
3 back panel assy
2 four screws
(BTP3
× 8)
2 two screws
(BTP3
× 8)
1 wire (flat type) (25 core) (CN806)
1 wire (flat type) (17 core) (CN804)
2 connector
(CN902)
4 main board
3 screw
(BTP3 × 12)

HCD-M90
14
3-8. CONTROL BOARD, NOISE SHIELD CASE
3-9. DAC BOARD
6 two screws
(BVTP3 × 8)
7
5 two leads (with connector)
5 lead (with connector)
1 wire (flat type) (FFC) (6 core)
(CN803)
1 wire (flat type) (FFC) (13 core)
(CN506)
1 wire (flat type) (FFC) (10 core)
(CN507)
3 control board
2 two screws
(BVTP3 × 8)
4 connector
(CN008)
8 noise shield case
6 two screws
(BVTP3 × 8)
3 terminal
3 terminal
4 DAC board
2 screw
(DIA. 2.6
× 8)
2 screw
(DIA. 2.6
× 8)
1 wire (flat type) (FFC) (5 core)
(CN300)

HCD-M90
15
3-10. DVD BOARD
3-11. MECHANISM DECK (CDM55D-DVBU8B)
2 connector
(CN402)
4 terminal
4 terminal
5 DVD board
4 two terminals
3 screw
(DIA. 2.6 × 8
)
3 screw
(DIA. 2.6
× 8)
3 two screws
(DIA. 2.6 × 8)
1 flexible flat cable 25P
(CN010)
1 flexible flat cable (9 core)
(CN009)
3 screw
(BVTP3
× 8)
1 two screws
(DIA. 2.6 × 8)
2 bracket (MPEG)
4 Remove the mechanism dec
k
in the direction of the arrow.
3 two claws

HCD-M90
16
3-12. LOADING BOARD, MOTOR (LD) ASSY (M901)
3-13. RF-240 BOARD
2 two screws
(BTP 2.6
× 6)
5 loading board
3 Remove the two soldes
of motor (LD) assy (M901) .
4 motor (LD) assy (M901)
1 Remove the belt (CDM55).
3 two screws
(BTP 2.6 × 6)
4 RF-240 board
1 flexible flat cable (25 core
)
(CN002)
2 flexible flat cable (26P)
(CN001)

HCD-M90
17
3-14. TRAY
3-15. OPTICAL DEVICE
1 While pushing the two protrusions, release the two claws fixing the tray
and pull out the tray in the direction of the arrow
A . (Be carefull of the two claws.
)
2 tray
A
1 floating screw (PTPWHM 2.6)
2 flexible flat cable
(9 core)
3 flexible flat cable
(26 core)
4 step screw (L)
8 three insulators
9 optical device
5 two step screws (M)
6 holder (KHM-240)
7

18
HCD-M90 SECTION 4
TEST MODE
[COLD RESET]
•The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Press the I/1key to turn the power ON.
2. Press three keys x,zREC , and I/1simultaneously.
3. The set is reset, and becomes standby state.
[PANEL TEST]
•This mode is used to check the liquid crystal display, LED,
destination, model, software version, and key.
Procedure:
1. Press the I/1key to turn the power ON.
2. Press three keys ZDVD ,zREC , and [FUNCTION]
simultaneously.
3. Liquid crystal display and LEDs are all turned on.
4. When you want to enter the version check mode, press the
[PLAY MODE/TUNING MODE] keys.Thedestinationandmodel
are displayed.
5. Each time [PLAY MODE/TUNING MODE] key is pressed, the
display changes starting from MC version, GC version, ST
version, TA version, TM version, TC version, MD version, and
DVD versionin this order, and returns tothe MC version display.
6. When [REPEAT/FM MODE] key is pressed while the version
numbers are being displayed except model and destination,
year, month and day of the software creation appear. When
[REPEAT/FM MODE] key is pressed again, the display returns to
thesoftwareversiondisplay.When[PLAY MODE/TUNING MODE]
keyis pressedwhile year, month anddayof the softwarecreation
are being displayed, the year, month and day of creation of the
software versions are displayed in the same order of version
display.
7. Pressthe [CD SYNCHRO] key, andthekeycheckmodeisactivated.
8. In the key check mode, the liquid crystal display displays “K0
J0 V0”. Each time a key is pressed, “K” value increases.
However, onceakey is pressed, it is no longer takenintoaccount.
9. To release this mode, press three keys in the same manner as
step 2, or disconnect the power cord.
[AMPTEST MODE]
•This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the I/1key to turn the power ON.
2. Pressthreekeys x,[DSG],and[PLAY MODE/TUNING MODE]
simultaneously.
3. Thedisplay changes a shownbeloweach time [BASS/TREBLE]
key on the remote commander is pressed.
4. The display changes “VOLUME MAX” each time [VOLUME +]
key is pressed and “VOLUME MIN” each time [VOLUME --] key
is pressed.
[DVD SHIP (MECHA) MODE]
•This mode moves the optical pick-up to the position durable to
vibration. Use this mode when returning the set to the customer
after repair.
Procedure:
1. Press the I/1key to turn the power ON.
2. Press the [FUNCTION] key to select “DVD”.
3. Press three keys x, [DSG], and [REPEAT/FM MODE]
simultaneously.
4. The message “LOCK” is displayed on the liquid crystal display
and turn the power off automatically, and becomes delivery
mode.
[SHIP MODE]
•This mode is used to execute “COLD RESET” and “DVD SHIP
(MECHA)” simultaneously.
1. Press the I/1key to turn the power ON.
2. Press the [FUNCTION] key to select “DVD”.
3. Pressthreekeys x,[DSG],and [CD SYNCHRO] simultaneously.
4. The message “LOCK” is displayed on the liquid crystal display
and turn the power off automatically, and set is reset, then
becomes delivery mode.
[DVD SERVICE MODE]
•This mode allows you to make diagnosis and adjustment easily
using the remote commander and monitor TV. The instructions,
diagnostic results, etc. are given on the on-screen display (OSD).
Enter the DVD Service Mode
Procedure:
1. Connect a TVmonitor to this set.
2. Press the I/1key to turn the power ON.
3. Press the [FUNCTION] key to select “DVD”.
4. Pressthree keys x,[DSG],and[DIRECTION] simultaneously.
5. Test mode start and display the menu shown below on the TV
screen. (At the bottom of the menu screen, the model name and
revision number are displayed)
6. To execute each function, select the desired menu and press its
number on the remote commander. To release from this mode,
press the I/1key.
Test Mode Menu
0. Syscon Diagnosis
1. Drive Auto Adjustment
2. Drive Manual Operation
3. Mecha Aging
4. Emergency History
5. Version Information
6. Video Level Adjustment
Exit: POWER Key
_
Model : HCX-1102_xx
Revision: 1.xxx
“TONE MAX”
“TONE MIN”
“TONE FLAT”
(BASS/TREBLE MAX, VOLUME MAX)
(BASS/TREBLE MIN, VOLUME MAX)
(BASS/TREBLE FLAT, VOLUME MAX
)
Ver 1.2

19
HCD-M90
Syscon Diagnosis
The same contents as board detail check by serial interface can be
checked from the remote commander.
On the Test Mode Menu screen, press the [10/0] key on the remote
commander, and the following Check Menu will be displayed.
### Syscon Diagnosis ###
Check Menu
0. Quit
1. All
2. Version
3. Peripheral
4. Servo
5. Supply
6. AV Decoder
7. Video
8. Audio
_
0. Quit
Quit the Syscon Diagnosis and return to the Test Mode Menu.
1. All
This menu checks all diagnostic items continuously. Normally, all
items are checked successively one after another automatically
unless an error is found, but at a certain item that requires judgment
througha visual check totheresult,the following screen is displayed
for the key entry.
### Syscon Diagnosis ###
Diag All Check
No. 2 Version
2-2. Revision
ROM Revision = 1070
Press NEXT Key to Continue
Press PREV Key to Repeat
_
For the ROM Check, the check sum calculated by the syscon is
output, and therefore you must compare it with the specified value
for confirmation. Following the message, press the DVD >key
to go to the next item, or the DVD .key to repeat the same
check again. To quit the Syscon Diagnosis and return to the Check
Menu screen, press the DVD xor the [ENTER] keyon the remote
commander. If an error occurred, the diagnosis is suspended and
the error code is displayed as shown below.
### Syscon Diagnosis ###
3-2. EEPROM Check
Error 03: EEPROM Write/Reed N
Address : 00000001
Write Data : 2492
Read Data : 2490
Press NEXT Key to Continue
Press PREV Key to Repeat
_
Selecting 2 and subsequent items calls the submenu screen of each
item.For example, if “5.Supply”is selected, the followingsubmenu
will be displayed.
### Syscon Diagnosis ###
Check Menu
No. 5 Supply
0. Quit
1. All
2. ARP Register Check
3. ARP to RAM Data Bus
4. ARP to RAM Address Bus
5. ARP RAM Check
_
2. Version
(2-2) Revision
ROM revision number is displayed.
Error: Not detected.
The revision number defined in the source file of ROM
(IC108) is displayed with four digits.
(2-3) ROM Check Sum
Check sum is calculated.
Error: Not detected.
The 8-bit data are added at addresses 0x000F0000 to
0x002EFFFF of ROM (IC108) and the result is displayed
with 4-digit hexadecimal number. Compare the result with
the specified value.
(2-4) Model Type
Model code is displayed.
Error: Not detected.
The model code read from EEPROM (IC101) is displayed
with 2-digit hexadecimal number.
(2-5) Region
Region code is displayed.
Error: Not detected.
The region code determined from the model code is displayed.
3. Peripheral
(3-2) EEPROM Check
Data write →read, and accord check
Error 03: EEPROM write/read discord
Data 0x9249, 0x2942, 0x4294 are written to addresses
0x00~0xFF of EEPROM (IC101), then read and checked.
Before writing, the data are saved, then after checking, they
are written to restore the contents of EEPROM.
4. Servo
(4-2) Servo DSP Check
Data write →read, and accord check
Error 12: Read data discord
Data 0x9249, 0x2942, 0x4294 are written to the address
0x602 of RAM in the servo DSP (IC302), then read and
checked.