HCD-M100
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HCD-M100/M300AV
SERVICE MANUAL
HCD-M100/M300AV is the tuner, deck, CD and
amplifier section in MHC-M100/M300AV.
SPECIFICATIONS
COMPACT COMPONENT SYSTEM
— Continued on next page —
Model Name Using Similar Mechanism HCD-MC3AV
CD Mechanism Type CDM-46B1
Optical Pick-up Name KSM-213BFN/C2NP
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type TCM-230AWR21
CD
SECTION
TAPE DECK
SECTION
US Model
Amplifier section
U.S.A models:
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC DISTORTION:
With 6 Ω loads both channels driven, from 120 – 10,000 Hz; rated 75 W per
channel minimum RMS power, with no more than 10% total harmonic
distortion from 250 mW to rated output.
MHC-M300AV
Front Speaker:
Continuous RMS power output
75 + 75 W
(6 Ω at 1 kHz, 10% THD)
Total harmonic distortion
less than 0.09%
(6 Ω at 1 kHz, 40 W)
Center Speaker:
Continuous RMS power output
35 W
(6 Ω at 1 kHz. 10% THD)
Rear Speaker:
Continuous RMS power output
17.5 + 17.5 W
(12 Ω at 1 kHz, 10% THD)
MHC-M100
Continuous RMS power output
75 + 75 W
(6 Ω at 1 kHz, 10% THD)
Total harmonic distortion
less than 0.09%
(6 Ω at 1 kHz, 40 W)
Inputs
VIDEO/MD IN (phono jack):
voltage 250 mV/450 mV,
impedance 47 kΩ
Outputs
PHONES (stereo phone jacks):
accepts headphones of 8 Ω or more
FRONT SPEAKER: accepts impedance of 6 to 16 Ω
REAR SPEAKER: (M300AV only):
MHC-M300AV accepts impedance of 12 to 16 Ω
CENTER SPEAKER: (M300AV only):
accepts impedance of 6 Ω
SUPER WOOFER: (M300AV only):
voltage 1 V, impedance 1 kΩ
Manufactured under license from Dolby
Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol ; and
“PRO LOGIC” are trademarks of Dolby
Laboratories Licensing Corporation.
Photo: HCD-M300AV
Ver 1.1 2001. 07
9-929-271-12
2001G0200-1
© 2001.7
Sony Corporation
Home Audio Company
Shinagawa Tec Service Manual Production Group
2
CD player section
System Compact disc and digital audio system
Laser Semiconductor laser (λ =780 mm)
Emission duration: continuous
Laser output Max. 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 with
7 mm aperture.
Frequency response 2 Hz – 20 kHz (± 0.5 dB)
Wavelength 780 – 790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length 600 nm
Output level –18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 – 13,000 Hz (± 3 dB),
using Sony TYPE I cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
Antenna FM lead antenna
Antenna terminals 75 Ω unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range 530 – 1,710 kHz
(with the interval set at 10 kHz)
531 – 1,710 kHz
(with the interval set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
General
Power requirements 120 V AC, 60 Hz
Power consumption
MHC-M300AV: 190 W
MHC-M100: 150 W
Dimensions (w/h/d) Approx. 280 × 373 × 468 mm
Mass
MHC-M300AV: Approx. 10.9 kg
MHC-M100: Approx. 10.5 kg
Supplied accessories: AM loop antenna (1)
Remote commander (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (for MHC-M300AV only) (2)
Center speaker pads (for MHC-M300AV
only) (4)
Design and specifications are subject to change without notice.
3
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 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
PUBLISHED BY SONY.
This appliance is classified as a CLASS 1 LASER product. The
CLASS 1 LASER PRODUCT MARKING is located on the rear
exterior.
CAUTION
Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
SAFETY CHECK-OUT
(US model only)
After correcting the original service problem, perform the
following safety checks 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
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” 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 passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)
Fig. A. Using an AC voltmeter to check AC leakage.
0.15µF
To Exposed Metal
Parts on Set
1.5kΩ
AC
voltmeter
(0.75V)
Earth Ground
4
TABLE OF CONTENTS
1. GENERAL
Font Panel ··············································································· 5
Rear Panel ·············································································· 6
2. DISASSEMBLY ······························································· 8
3. TEST MODE ··································································· 16
4. MECHANICAL ADJUSTMENTS ···························· 18
5. ELECTRICAL ADJUSTMENTS
Deck Section ········································································ 21
CD Section ··········································································· 23
6. DIAGRAMS
6-1. Block Diagram – CD Section – ········································ 24
Block Diagram – Main Section – ····································· 25
Block Diagram – Audio Section –···································· 26
6-2. Circuit Boards Location ··················································· 27
6-3. Printed Wiring Board – BD Section – ······························ 28
6-4. Schematic Diagram – BD Section – ································· 29
6-5. Printed Wiring Board – CD Motor Section – ··················· 30
6-6. Schematic Diagram – CD Motor Section – ······················ 31
6-7. Printed Wiring Board – Audio Section – ·························· 32
6-8. Schematic Diagram – Audio Section –····························· 33
6-9. Printed Wiring Board – Main Section – ··························· 34
6-10. Schematic Diagram – Main (1/6) Section – ····················· 35
6-11. Schematic Diagram – Main (2/6) Section – ····················· 36
6-12. Schematic Diagram – Main (3/6) Section – ····················· 37
6-13. Schematic Diagram – Main (4/6) Section – ····················· 38
6-14. Schematic Diagram – Main (5/6) Section – ····················· 39
6-15. Schematic Diagram – Main (6/6) Section – ····················· 40
6-16. Printed Wiring Board – Power Section – ························· 41
6-17. Schematic Diagram – Power Section – ···························· 41
6-18. Printed Wiring Board – Panel Section – ··························· 42
6-19. Schematic Diagram – Panel Section – ····························· 43
6-20. Printed Wiring Board – Front Amp Section – ·················· 44
6-21. Schematic Diagram – Front Amp Section – ····················· 45
6-22. Schematic Diagram – Rear Amp Section – ······················ 46
6-23. Printed Wiring Board – Rear Amp Section – ··················· 47
6-24. Waveforms ········································································ 48
6-25. IC Pin Function Description ············································· 48
6-26. IC Block Diagrams ··························································· 56
7. EXPLODED VIEWS ····················································· 60
8. ELECTRICAL PARTS LIST ····································· 67
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electrostatic
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 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 repeatedly.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged
by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
5
SECTION 1
GENERAL
FRONT PANEL
1 @/1 button
2 STANDBY indicator
3 MEMO INPUT button
4 MEMO SCAN button
5 MEMO SEARCH button
6 TAPE A h button and indicator
7 CD 7 button and indicator
8 TAPE A H button and indicator
9 Display window
0 x (STOP) button
qa TAPE B h button and indicator
qs TUNER/BAND button
qd TAPE B H button and indicator
qf CHECK button
qg CLEAR button
qh DELETE button
qj GROOVE button and indicator
qk FUNCTION button
ql DSP button and indicator
w; DBFB button
wa CONTINUE/STEREO/MONO button
ws ENTER button
wd PROGRAM/TUNER MEMORY button
wf SHUFFLE/DIRECTION button
wg + M > button
wh m .– button
wj SELECTOR dial
wk PHONES jack
wl FILE SELECT button
e; VOLUME knob
ea X PAUSE button and indicator
es CD SYNCHRO button
ed z REC button
ef CD PLUS ONE button
eg TIMER SELECT button and indicator
eh CLOCK TIMER SET button
ej DISPLAY button
ek PROLOGIC button and indicator
(HCD-M300AV only)
1
ef
eg
eh
ej
ek
2
3
4
5
678 90 qaqsqd qfqgqh
qj
qk
w;
wa
ws
wd
wf
wg
wh
wj
wk
wle;eaesed
ql
Photo: HCD-M300AV
6
REAR PANEL
1 CD DIGITAL OUT connector
2 SUPER WOOFER jack (HCD-M300AV only)
3 MD/VIDEO INPUT (AUDIO) jack
4 ANTENNA terminal
5 CENTER SPEAKER terminal (HCD-M300AV only)
6 REAR SPEAKER terminal (HCD-M300AV only)
7 FRONT SPEAKER terminal
8 AC power cord
1
2
3
4 5 6 7
8
Photo: HCD-M300AV
7
This section is extracted from
instruction manual.
8
SECTION 2
DISASSEMBLY
2-1. CASE
2-2. FRONT PANEL SECTION
Note : Follow the disassembly procedure in the numerical order given.
1 Three screws
(CASE3 TP2)
1 Three screws
(CASE3 TP2)
2 Three screws
(BVTP 3 × 8)
3 Case
7 Screws
(BVTT 3 × 8)
8 Lug
4 Connector(CN804)
5 Connector(CN604A
)
6 Connector(CN453)
1 Wire (flat type)
(17 core)
2 Wire (flat type)
(15 core)
0 Two claws
qa Front panel assy
0 Two claws
9 Three screws
(BVTP 3 × 8)
3 Wire (flat type) (10 core)
9
2-3. DOOR ASSY
2-4. BACK PANEL
2 Open the door ass'y
1 Two screws
(PTPWH 2.6 × 8)
A
3 Remove the door ass'
y
to direction of the
arrow A.
7 Six screws
(BVTP 3 × 8)
5 Two screws
(BVTP 3 × 8)
6 Two screws
(BVTP 3 × 8)
3 Five screws
(BVTP 3 × 8
)
4 Cover
8 Remove the back panel
to direction of the arrow.
2 Connector(CN751)
1 Connector
(CN802)
10
2-5. MAIN BOARD
2-6. POWER TRANSFORMER (T991)
qa Remove the MAI
N
board to direction
of the arrow.
0 Two screws
(BVTP 3 × 8)
2 Wire (flat type) (9 core)
1 Wire (flat type) (16 core)
7 Connector(CN451)
3 Connector(CN902)
4 Connector(CN801B)
6 Connector(CN461)
8 Connector(CN403)
5 Connector(CN454)
9 Connector(CN454)
6
Four screws
(BVTT 3 × 8)
7 Power transforme
3 Connector CN995
4 Two screws
(BVTT3 x 8)
5 Sub trans board
1 Connector CN992
2 Power cor
d
11
2-7. SUB CHASSIS
2-8. CD MECHANISM DECK SECTION
1 Two screws
(BVTT 3 × 8)
3 Sub chassis
2 Three screws
(BVTP 3 × 8)
2 Two screws
(BVTP 3 × 8)
8
Three screws
(BVTT 3 × 10)
9 Base (LOADING)
3 Two screws
(BVTP 3 × 8)
4 Cover (CD)
qs Base (CDM)
qa Screw
(BVTT 3 × 10)
0 Screw
(BVTT 3 × 14)
5 Two screws
(BVTT 3 × 6)
7 Reinforcement
1 Screw
(PTPWH 2.6 × 8)
2 Table (50)
6 Wire holder
12
2-9. CD BASE UNIT
2-10. BD BOARD, SLED MOTOR (M102)
1 Two screws
(BTVP 3 × 8)
2 Bracket
3 Two tention springs
5 Base unit
4 Four screws
(PTPWH 2.6 × 8)
6 Gear (A) (S)
5 Claw
0 Two screws (P 2 × 3)
qa Sled motor
(M102)
3 Removal
four solders.
2 Screw (PTPWH 2 × 5)
4 BD board
1 Wire (flat type) (16 core)
9 Gear (B) (RP)
7 Three claws
8 Gear cover
13
2-11. OPTICAL PICK-UP
2-12. TAPE MECHANISM DECK SECTION
3 Remove the optical
pick-up to direction
of the arrow A.
2 Sled shaft
1 Claw
A
2 Remove the cassette lid (L) ass'y
to direction of the arrow B.
1 Remove the cassette lid (R) ass'y
to direction of the arrow A.
A
B
3 Three screws
(BVTP 2.6 × 8)
3 Three screws
(BVTT 3 × 6)
4 Remove the tape mechanism
deck section.
14
2-13. PANEL BOARD
2-14. CASSETTE BOARD
0 Five screws
(BVTP 2.6 × 8)
0 Seven screws
(BVTP 2.6 × 8)
7 Volume ring
6 Volume knob
8 Selector ring
9 Selector ring
0 Five screws
(BVTP 2.6 × 8)
3 Remove the
cassette lid (R) assy
3 Remove the
cassette lid (L) assy
TORSION SPRING
(DOOR2)
TORSION SPRING
(DOOR1)
4 Two screws
(BVTP 2.6 × 8)
5 Remove the
TC bracket
qa Remove the panel (L) boar
d
qd Remove the panel board
qs Remove the panel (R) board
1
2
2
1
3 Two screws
(BVTT 2 × 4 (S))
2 Break the soldering of tw
o
flexible flat cables.
1 Four rivets
4 CASSETTE board
15
2-15. CAPSTAN MOTOR (M1)
3 Remove the belt.
1 Two screws
(PS 2.6 × 5)
2 Remove the belt.
4
Remove the capstan motor
to direction of the arrow.
16
SECTION 3
TEST MODE
[MC 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 three buttons x , ENTER and @/1 at the same
time.
2. The fluorescent indicator tube turns off for a moment and the
RAM is reset to the initial conditions.
[MC Hot Reset]
* This mode resets the set with the preset data kept stored in the
memory. This hot reset mode is performed also when the power
cord is plugged in and out.
Procedure:
1. Press the three buttons x , ENTER and FUNCTION at the
same time.
2. The fluorescent indicator tube turns off for a moment and the
RAM is reset to the initial conditions.
[CD Initial]
* The CD INITIAL clears all of the CD related data. Execute
this mode when returning the set to the customer.
Procedure:
1. Press the three buttons x , ENTER and CONTINUE/
STEREO/MONO at the same time.
2. The message “STANDBY” appears on the fluorescent indicator
tube and the CD related data is reset to the initial conditions.
[CD Line Test]
* The CD Line test displays the rotating time required for one
rotation by rotating the disc tray.
Procedure:
1. Press the three buttons x , ENTER and CLOCK/TIMER SET
at the same time. The CD PLAY LED and the CD PAUSE LED
flash alternately and the disc tray starts rotation.
2. The message “xx << y.y” appears on the fluorescent indicator
tube. The left numbers count up the discs starting from 1 to 51.
The left numbers “y.y” indicate the rotating time required for
one rotation by rotating the disc tray.
3. To exit the CD LINE test mode, execute the MC Hot Reset.
[CD Memo All Clear]
* The mode clears all contents of the CD disc memo. Execute
this mode when returning the set to the customer.
Procedure:
1. Press the two buttons MEMO INPUT and ENTER at the
same time.
2. The message “ALL ERASE” appears on the fluorescent indicator
tube and the CD disc memo is all cleared.
[GC Test Mode]
* This mode checks microprocessor version number, keys,
fluorescent tubes, LEDs and VACS (Variable Attenuation
Control System).
Procedure:
1. Press the three buttons x , ENTER and DISPLAY at the
same time. The set enters the GC test mode, and all of the
fluorescent tubes and LEDs turn on.
2. From this state, any one of the three modes MODEL NAME,
KEY CHECK and VACS can be selected. Go to step 3 to enter
the MODEL NAME test mode. Go to step 5 to enter the KEY
CHECK test mode. Go to step 11 to enter the VACS test mode.
3. [MODEL NAME test mode ] From the state of step 2, press the
CONTINUE/STEREO/MONO button. Every pressing of the
CONTINUE/STEREO/MONO button advances the following
check modes and displays in the given order. Model name
display, destination display, MC version display, GC version
display, DC version display, VC version display and CC version
display.
4. To exit the GC test mode and to return to the STANDBY mode,
press the x , ENTER and DISPLAY buttons again.
5. [KEY CHECK test mode ] You can enter this mode directly
from step 2. When you performed steps 3, perform steps 4,
then 1 and 2 before starting the step 5.
[KEY CHECK test mode ] From the GC test mode, press the
PROGRAM button to enter the key check mode.
The display: K 1, J 0, V 0 appears.
6. The value after K indicates the number of times that the key is
pressed. 1 is displayed because the PROGRAM button has
already been pressed.
7. When other keys are pressed one after another, the key count
increases up to 43. The keys which have already been pressed,
are not counted.
8. The value after J indicates the number of clicks that the JOG
dial is rotated. The clockwise rotation increases the count value.
The counter-clockwise rotation decreases the count value.
9. The value after V also indicates amount of rotation of volume
control. The clockwise rotation increases the count value. The
counter-clockwise rotation decreases the count value.
10. To exit the GC test mode and to return to the STANDBY mode,
press the x , ENTER and DISPLAY buttons again.
11. [VACS test mode ] You can enter this mode directly from step
2. When you performed steps 3, perform steps 4, then 1 and 2
before starting the step 5.
[VACS test mode ] From the GC test mode, press the SHUFFLE
button to enter the VACS attenuation check mode. The display:
VOL NORMAL appears.
12. To exit the GC test mode and to return to the STANDBY mode,
press the x , ENTER and DISPLAY buttons again.
[Aging Mode]
The decks A and B are operated automatically for aging purpose.
When errors occur during aging, causes of errors are displayed and
the aging mode is stopped.
How to enter the aging mode
1. Turn on the main power. Install a playback tape to deck A and
install a blank tape to deck B.
2. Select TAPE A with the FUNCTION button.
3. Press the three buttons of x , ENTER and SHUFFLE at the
same time to enter the aging mode.
How to exit the aging mode.
Turn off the main power.
1. Rewind the tapes A and B. Tapes stop at the shut-off of tape A
and the aging mode advances to the next step.
The message: TAPE A AG-1 appears.
2. The tape A is played back in the FWD mode. After two minutes
of the FWD playback, the aging mode advances to the next
step.
The message: TAPE A AG-2 appears.
17
3. The tape A runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE A AG-3 appears.
4. The tape A is played back in the RVS mode. After two minutes
of the RVS playback, the aging mode advances to the next step.
The message: TAPE A AG-4 appears.
5. The tape A is rewound and stops at the shut-off. The aging
mode advances to the next step.
The message: TAPE A AG-5 appears.
6. The tape B is played back in the FWD mode. After two minutes
of the FWD playback, the aging mode advances to the next
step.
The message: TAPE B AG-2 appears.
7. The tape B runs in fast forward. After two minutes of fast
forward, or at the shut-off point, the tape is stopped and the
aging mode advances to the next step.
The message: TAPE B AG-3 appears.
8. The tape B is played back in the RVS mode. After two minutes
of the RVS playback, the aging mode advances to the next step.
The message: TAPE B AG-4 appears.
9. The tape B is rewound and stops at the shut-off. The aging
mode advances to the next step.
The message: TAPE B AG-5 appears.
[AM TUNER STEP 9 kHz/10 kHz Selection Mode]
* Either the 9 kHz step or 10 kHz step can be selected for the AM
channel step.
Procedure:
1. Turn on the power and select TUNER using the FUNCTION
button.
2. Select AM with the TUNER/BAND button and turn off the
power.
3. Press the two buttons ENTER and @/1 at the same time. The
main power is turned on and the other frequency step of the
previous mode is selected and displayed. “AM 9 k STEP” or
“AM 10 k STEP”
[CD SRAM Test Mode]
Procedure:
1. Turn on the power and select CD using the FUNCTION button.
2. Press the three buttons x , ENTER and DBFB at the same
time.
3. The message “SRAM OK” appears on the fluorescent indicator
tube.
[GC VACS ON/OFF Mode]
Procedure:
1. Press the two buttons DELETE and @/1 at the same time.
2. The message “VACS ON” or “VACS OFF” appears on the
fluorescent indicator tube.
18
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
3.06 N • m to 6.96 N • m
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
0.19 N • m to 0.58 N • m
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
6.96 N • m to 14.02 N • m
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
9.80 N • m
100 g or more
(3.53 oz or more)
9.80 N • m
100 g or more
(3.53 oz or more)
FWD
FWD
back tension
REV
REV
back tension
FF/REW
FWD tension
REV tension
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
SECTION 4
MECHANICAL ADJUSTMENT
• TAPE MECHANISM DECK SECTION
• Torque Measurement
• CD MECHANISM DECK SECTION
To adjust the mechanism section, enter the mechanism section adjustment mode.
For how to enter the mechanism section adjustment mode, refer to each adjustment section.
DISC SENSOR ALIGNMENT
1. Make sure that there is no disc in the unit.
2. Connect an oscilloscope to IC401rs, IC4014 of the MAIN board.
3. Press the @/1 button to turn ON the power.
Precaution
1. Clean the following parts with a denatured alcohol-moistened
swab:
record/playback heads pinch rollers
erase head rubber belts
capstan idlers
2. Demagnetize the record/playback head with a head demagne-
tizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
Mode
Torque meter Meter reading
4. Press the x button, ENTER button and CLOCK/TIMER SET button simultaneously.
oscilloscope
IC401rs D.SENS (CH1)
IC4014 HHOUT (CH2)
GND
19
5. The disc table rotates in the clockwise direction. The disc table rotation time is displayed with “PLUS ONE” slit as a measuring point.
6. Measure the waveform of the oscilloscope when the disc table is rotating.
7. Move the holder (sensor) center so that the flat portion center at the top of the D.SENS (CH1) input waveform and the “H” center of
HHOUT (CH2) coincide.
8. Tighten the fixed screw to fix the disc table, then press the CLEAR button.
9. The disc table rotates in the counterclockwise direction. Measure the waveform and make sure that the flat portion center at the top of the
D.SENS (CH1) input waveform and the “H” center of HHOUT (CH2) coincide.
10. If the adjustment is not successful, press the CLEAR button to rotate the disc table in the clockwise direction, and perform steps 6 to 9.
Note: During the adjustment mode, the rotational direction is switched each time the CLEAR button is pressed.
Pressing the CHECK button enters the loading mode which will be described later. Pressing the CLEAR button rotates the disc table
again.
PLUS ONE
HHOUT (CH2) waveform
D.SENS (CH1) waveform
Flat portion center of
D.SENS (CH1) waveform
Fixed screw
Holder (sensor)
20
MAGNET ASSY ALIGNMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Close the door, and while pressing the x button, ENTER button and CLOCK/TIMER SET button simultaneously.
3. Press the CHECK button, and set the loading mode.
4. Press the +
J L button and chuck the disc.
5. Adjust the magnet assembly and magnet holder so that A = B as shown in the figure.
DISC HOLDER A ALIGNMENT
1. Check that there is no disc in the unit and then turn ON the power. Open the door, and set a disc in the PLUS ONE slit.
2. Close the door, and while pressing the x button, ENTER button and CLOCK/TIMER SET button simultaneously.
3. Press the CHECK button, and set the loading mode.
4. Press the + J L button and chuck the disc.
5. Press + J L or l j – button to stop the disc holder A slightly away from the disc.
6. Rotate and adjust the adjusting screw so that the center of the disc and that of the disc holder coincide.
AB
Magnet ASSY
Magnet holder
Magnet ASSY
Screw (For adjustment)
Disc
Disc holder A
Disc holder A
Screw (For adjustment
)
Disc
a = b
a
b
21
SECTION 5
ELECTRICAL ADJUSTMENTS
2. Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1 dB of peak.
3. Mode: Playback
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
0 dB = 0.775 V
DECK SECTION
1. Demagnetize the record/playback head with a head demagne-
tizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to the
parts adjust.
4. The adjustments should be performed with the rated power sup-
ply voltage unless otherwise noted.
5. The adjustments should be performed in the order given in this
service manual. (As a general rule, playback circuit adjustment
should be completed before performing recording circuit ad-
justment.)
6. The adjustments should be performed for both L-CH and R-
CH.
7. Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
Record/Playback Head Azimuth Adjustment
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
P-4-L300 315 Hz, 0 dB Level Adjustment
DECK A/B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
set
main board
CN301B
Pin qs (L-CH)
Pin qa (R-CH)
main board
CN301B
Pin 0 (GND)
+
–
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Screw
position
L-CH
peak
within
1dB
Output
level
L-CH
peak
R-CH
peak
within
1dB
Screw
position
R-CH
peak
MAIN
board
CN301B
set
test tape
P-4-A100
(10 kHz, –10 dB)
pin
qa
oscilloscope
L-CH
R-CH
V
H
waveform of oscilloscope
in phase 45° 90° 135° 180 °
good
wrong
pin 0
pin qs
L
R
22
[MAIN BOARD] (Component Side)
[CASSETTE BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
Tape Speed Adjustment DECK A/B
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
Procedure:
1. Press the @/1 button to turn ON the power.
2. Press the x button, ENTER button and TIMER SELECT
button simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the @/1 button.
Mode: Playback
1. Insert the WS-48B into the deck.
2. Press the H button on the deck.
3. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 Hz.
Adjustment Location: LEAF SW board
Sample Value of Wow and filter
W, RMS (JIS) within 0.3%
(test tape: WS-48B)
Playback level Adjustment DECK A/B
Procedure:
Mode: Playback
Adjust DECK A/B: VR301 (R-CH) so the level meter reading
becomes the adjustment limits below.
Adjustment Level:
CN301 PB level: 155 to 275 mV (– 14 to – 9 dB) level difference
between the channels: within ± 0.5 dB
Adjustment Location: CASSETTE board
+
–
set
test tape
WS-48B
(3 kHz, 0 dB)
main board
CN301B (Pin qs : L-CH)
(
Pin qa : R-CH
)
frequency counte
r
+
–
set
test tape
P-4-L300
(315 Hz, 0 dB)
Phones jack (HP801)
level meter
CN401
CN301B
IC501
CN402
19
28
115
216
12 2
11 1
VR301
PB
LEVEL
IC301
CN301
1
2
11
12
TAPE SPEED
RV1002
(NORMAL)
CN1001
23
23
When a general remote commander is used:
1. Press the @/1 button to turn ON the power.
2. Open the front cover, and press the CD PLUS ONE button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the @/1 button to turn OFF the power.
6. Connect the oscilloscope to TP (TE) of the BD board.
7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
8. Press the @/1 button to turn ON the power.
9. Playback the fifth track of the disc.
10. Press the 3 button on the remote commander. (The tracking
servo and the sledding servo are turned OFF.)
11. Check the level B of the oscilloscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 10%
10. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note : A clear RF signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
E-F Balance (Traverse) Check
The procedure for this checking method differs for when a general
remote control unit is used and not used.
12. Press the 8 button on the remote control unit. (The tracking
servo and sledding servo are turned ON.) Confirm the C (DC
voltage) is almost equal to the A (DC voltage) is step 11.
13. Turn OFF the power, and remove the lead wire connected at
step 7.
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MW impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
S Curve Check
Procedure :
1. Press the @/1 button to turn ON the power .
2. Open the front cover, and press the CD PLUS ONE button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the @/1 button to turn OFF the power.
6. Connect the oscilloscope to TP (FE) of the BD board.
7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
8. Press the @/1 button to turn ON the power.
9. The first track will be played back automatically. When the
CHECK button is pressed, “S JI” will be displayed on the
fluorescent indicator tube, and focus search will be repeated.
10. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 1.8 ±
0.6 Vp-p.
11. Turn OFF the power, and remove the lead wire connected at
step 7.
Note : • Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Press the @/1 button to turn ON the power.
2. Open the front cover, and press the CD PLUS ONE button.
3. Set the disc (YEDS-18) into the “PLUS ONE” slit.
4. Close the front cover, and chuck the disc.
5. Press the @/1 button to turn OFF the power.
6. Connect the oscilloscope to TP (RF) of the BD board.
7. Connect TP (ADJ) of the MAIN board and connect TP (GND)
with a lead wire.
8. Press the @/1 button to turn ON the power.
9. Playback the fifth track of the disc.
oscilloscope
BD board
TP (FE)
TP (VC)
S-curve waveform
symmetry
within 1.8 ± 0.6Vp-p
A
B
oscilloscope
BD board
TP (RF)
TP (VC)
RF signal waveform
level : 1.8 ± Vp-p
VOLT/DIV : 200mV
TIME/DIV : 500ns
+0.3
–0.2
TP (TE)
TP (VC)
BD board
oscilloscope
Traverse wavefor m
A (DC voltage)
B
Center of the waveform
level : 0.7 ± 0.3 Vp-p
0V
Traverse wavefor m
0V
C (DC
voltage)
Tracking servo
Sled servo
ON
Tracking servo
Sled servo
OFF
When a general remote commander is not used:
1. Solder lead wires to TP (DVDD) and TP (TOFF) on the BD
board severally.
2. Connect the oscilloscope to TP (TE) of the BD board.
3. Press the @/1 button to turn ON the power.
4. Open the front cover, and press the CD PLUS ONE button.
5. Set the disc (YEDS-18) into the “PLUS ONE” slit.
6. Close the front cover, and chuck the disc.
7. Playback the fifth track of the disc.
8. Short-circuit the lead wire connected at step 1. (The tracking
servo is turned OFF)
9. Check the level B of the oscilliscope's waveform and the A
(DC voltage) of the center of the Traverse waveform.
Confirm the following :
A/B × 100 = less than ± 10%
10. Disconnect the lead wire short-circuited at step 8. (The tracking
servo is turned ON.) Confirm the C (DC voltage) is almost
equal to the A (DC voltage) is step 8.
11. Turn OFF the power, and remove the lead wire connected at
step 1.
RF PLL Free-run Frequency Check
Procedure :
1. Connect the frequency counter to TP (PLCK) of the BD board.
2. Press the
@/1 button to turn ON the power.
3. Open the front cover, and press the CD PLUS ONE button.
4. Set the disc (YEDS-18) into the “PLUS ONE” slit.
5. Close the front cover, and chuck the disc.
6. Playback the fifth track of the disc.
7. Confirm that reading on frequency counter is 4.3218 MHz ±
30 kHz.
Adjustment Location :
[ BD BOARD ] — CONDUCTOR SIDE —
[ MAIN BOARD ] — COMPONENT SIDE —
oscilloscope
BD board
TP (TE)
TP (VC)
Traverse wavefor m
A (DC voltage)
B
Center of the waveform
level : 0.7 ± 0.3 Vp-p
0V
Traverse waveform
0V
C (DC
Tracking servo
OFF
Tracking servo
ON
voltage)
frequency counter
BD board
TP (PLCK)
IC102
IC101
TP
(VC)
TP
(TE)
TP
(FE)
TP
(RF)
TP
(PLCK)
CN101
CN102
CN103
TP
(DVDD)
TP
(TOFF)
CN401
CN301B
IC501
CN402
19
28
115
216
12 2
11 1
HCD-M100/M300AV
24
24
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SECTION –
OPTICAL PICK-UP
BLOCK
(KSM-213BFN/C2NP)
LD
DRIVER
Q103
A+5V
LD
GND
FOCUS
COIL
F+
F
T+
T
TRACKING
COIL
IC103
FCS/TRK COIL
SL/SP MOTOR
DRIVER
SLED/SPINDLE SERVO
RF AMP
IC101
18
22
17
19
20
VR
PD
8
7
6
5
15
10
V02
V IN 4
V IN 3
3
V IN 1
2
MUTE
V06
V05
V07
V08
V04
V03
V02
V01
M
M
MOTOR
M102
SLED
MOTOR
M101
SPINDOL
S101
LIMIT
VDD
D IN
GND
A+5V
CD
DIGITAL
OUT
IC402
09
:CD
:DIGITAL OUT
• SIGNAL PATH
41
RF SM
VR
58
VCC
VC
A
B
C
D
E
F
DETECTOR
FOCUS/TRACKING/
FIN 1
2
FIN 2
1
E
3
F
4
LDD
62
LDS
63
FD
16
TO
15
SLD
29
SPD
27
52DATA
50
CLK
51
CL
53
CE
34
TGL
54
DRF
39
CV-
40CV+
Q101
30
SL-
Q102
31
SL+
35TOFF
44SLI
49DEF
36
TES
37
HFL
33JP+
32JP-
DIGITAL SIGNAL
PROCESSOR
IC102
EFMI
10
EFMO
9
DEFI
1
TES
16
HFL
15
JP+
19
JP-
20
COIN
56
4.2M
61
CQCK
57
RWC
54
TGL
18
SLOF
V/P
14
CONT2
25
TOFF
17
CONT3
26
CLV+
12
CLV-
13
CONT4
27
31
D OUT
49
PW
CD TEXT
DECODER
IC104
SBSO
2
WFCK
4
MCK
5
EXCK
1
SCOR
3
12
SRDT
11
SCLK
13DQSY
6XMODE
50
SFSY
60
16M
51
SBCK
47
SBSY
53
WRQ
55
SQOUT
3
PDO
45
XI
44
XO
X101
16.9344MHz
37
L CH
40
R CH
R CH
58
RESET
CD CHANGER
CONTROL
IC401
80
IIC DATA
78
IIC CLK
66
65
64
67
55
49
SRDT
SCLK
DQSY
XMODE
WRQ
SQOUT
COIN
50
BD RESET
2
COCK
48
RWC
58
TGL
57
DRF
54
SL+
47
SL-
59
XTAL
32
EXTAL
31
X401
10MHz
D151
IC461
MOTOR DRIVER
8
9
11
10
OUT1+
OUT1-
OUT2+
OUT2-
M
M
MOTOR
M601
LOADING
MOTOR
M602
TABLE
3
2
16
17
R IN 1
F IN 1
R IN 2
F IN 2
LD OUT
76
LD IN
77
TBL L
75
TBL R
74
30
RESET
42D SENS
Q471
815
8
D0
D7
A0
A14
SRAM
IC411
WE
27
20
CE
29
WE
RESET
SW
Q411
+5V
Q51 D51
DISC
SENSOR
DISC
SENSOR
62
TSENS 1
61
TSENS 2
70
UP SW
71
DOWN SW
69
DOOR SW
63
TSENS 3
TABL
SENSOR
IC51-53
S51
(UP)
S52
(DOWN)
S413
(DOOR)
RESET
IIC DATA
IIC CLK
CD L
MAIN
SECTION
(Page 26)
B
AMP
SECTION
(Page 25)
A
38
1
2
3
BUFFER
MOTOR
CONTROL
Q464,468
MOTOR
CONTROL
Q461,465
MOTOR
CONTROL
Q463,467
MOTOR
CONTROL
Q462,466
HCD-M100/M300AV
25
25
– MAIN SECTION –
• R-CH is omitted
• SIGNAL PATH
: CD
: AUDIO
: PB (DECK A)
: PB (DECK B)
: REC
: MD/VIDEO
21
22
MUTE
SWITCH
MUTE
Q293
MUTE
Q292
MUTE
Q291
MUTE
Q131
Q294,295
72
74
77
78
76
9
14
17
22
23
24
3
79
MUTE
SWITCH
OVER LOAD
DET.
Q263,
264
MUTE
SWITCH
67
70 71 1
6566
Q171,172
MUTE
CONTROL
POWER
AMP
MUTE
MUTE
SWITCH
MUTE
SWITCH
OVER LOAD
DET.
OVER LOAD
DET.
CD L
PB L
REC IN L
TUNER L
J01
MD/VIDEO
IN
(AUDIO)
L
L
R
REAR
SPEAKER
CENTER
SPEAKER
SUPER
WOOFER
79
63 62 75 74 61 68
27 28
LATCH
DRIVER
LATCH
DRIVER
LATCH
DRIVER
PROTECT
DC AMP
PROTECT
SWITCH
OVER HEAT
DET.
3 1
3 1
+7V
REG
+9V
REG
+5V
REG
T992
D951
D961
AC IN
3 1
+5.6V
REG
-30V
REG.
B+
SWITCH
RELAY
DRIVER
RY771
Q841
Q842
1
80
MIX
AMP
Q161,162
R CH
57
16
15 10
4
5
6
7
8 9 27
Q141,143 Q145
31 1
12
6
Q741-743
Q197
IC831(1/3)
IC831(2/3)
Q771,772
Q703 Q721
Q711,712Q701,702
J801
L
R
FRONT
SPEAKER
JK801
(FAN)
M751
HP801
PHONES
J103
IC101
SOUND PROCESSOR
57
IC121
JP101
M100
MODEL
SCL
SDA
IC141 IC801
Q801
Q732,733
Q751,752
RY731
+VE
-VE
+VE
-VE
-VP
VF2
VF1
M+13V
M+7V
A+9V
P+5V
+5.6V
P+5V CD
FOR
FRONT
AMP
FOR
REAR
AMP
Q931 D836
IC922
Q901-904
IC921
Q921,922
PWR SAVE
CD POWER
PL RELAY
F RELAY
LINE MUTE
PL CE
PL CLK
PL DOUT
MUTE CENTER
MUTE REAR
TDA DATA
TDA CLK
DBFB H/N
DBFB ON/OFF
STK MUTE
JW840
JW838
JW832
IC931
D831,832
D931,932
RY991
D901-904
R CH
R CH
IC501(2/2)
MASTER
CONTROL
IC201
PRO LOGIC PROCESSOR
MAIN
SECTION
D
(Page 26)
CD
SECTION
A
(Page 24)
MAIN
SECTION
E
(Page 26)
MAIN
SECTION
C
(Page 26)
IC251
3
DATA
SCK
REQ
1
IC251
M300AV MODEL
09
SPEANA
T991
POWER
TRANSFORMER
F992
Q991
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