Sony HCD-M80 User manual

SERVICE MANUAL
COMPACT DISC DECK RECEIVER
E Model
SPECIFICATIONS
HCD-M80
Ver 1.1 2002.12
9-874-142-02 Sony Corporation
2002L0500-1 Home Audio Company
C2002.12 Published by Sony Engineering Corporation
HCD-M80 is the Amplifier, Video CD/CD player,
Tape Deck and Tuner section in CMT-M80V.
– Continued on next page –
Model Name Using Similar Mechanism NEW
CD CD Mechanism Type CDM55G-30BD62
Section Base Unit Name BU-30BD62
Optical Pick-up Name A-MAX.3
TAPE Model Name Using Similar Mechanism HCD-M70
Section
Amplifier section
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
MIC IN (mini jack) Sensitivity 1 mV,
impedance 10 kilohms
Outputs
VIDEO OUT: max. output level
(phono jack) 1 Vp-p, 75 ohms
PHONES: Accepts headphones with
an impedance of 8 ohms
or more
SPEAKER: accepts impedance of 6 to
16 ohms.
Tape deck section
Recording system 4-track 2-channel stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 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
Middle Eastern and Philippine models:
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Other models: 531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
Antenna AM loop antenna, external
antenna terminal
Intermediate frequency 450 kHz
VIDEO CD/CD player section
Laser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
Frequency response 20 Hz – 20 kHz =
(±1 dB)
Video color system format NTSC, PAL

2
HCD-M80
General
Power requirements
Saudi Arabian models: 120 – 127 V or
220 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector
Thailand 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 See the nameplate
Dimensions (w/h/d) incl. projecting parts and controls
Approx. 159 ×217 ×
335 mm
Mass Approx. 5.2 kg
Design and specifications are subject to change
without notice.
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-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.

3
HCD-M80
1. SERVICING NOTES ............................................... 4
2. GENERAL ................................................................... 5
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 6
3-2. Panel (Side) (L), Panel (Side) (R) .................................. 7
3-3. Top Panel Section............................................................ 7
3-4. Mechanical Deck (Tape) ................................................. 8
3-5. Front Panel Section ......................................................... 8
3-6. Back Panel Assy .............................................................. 9
3-7. MAIN Board ................................................................... 9
3-8. CD Mechanism Deck (CDM55G-30BD62) ................... 10
3-9. BU Holder Section .......................................................... 10
3-10. BASE Unit (BU-30BD62) .............................................. 11
3-11. LOADING Board ............................................................ 11
3-12. CAM (CDM55) ............................................................... 12
4. TEST MODE.............................................................. 13
5. ELECTRICAL ADJUSTMENTS
CD Section ...................................................................... 14
Video Section .................................................................. 15
Deck Section ................................................................... 15
6. DIAGRAMS
6-1. Block Diagram – CD SERVO Section – ....................... 16
6-2. Block Diagram – AUDIO/VIDEO CD Section –.......... 17
6-3. Block Diagram – TUNER/TAPE DECK Section – ...... 18
6-4. Block Diagram – MAIN Section – ................................ 19
6-5. Block Diagram
– KEY CONTROL/POWER SUPPLY Section –........... 20
6-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 21
6-7. Printed Wiring Board – BD Board – ............................. 22
6-8. Schematic Diagram – BD Board – ................................ 23
6-9. Printed Wiring Board – TC Board –.............................. 24
6-10. Schematic Diagram – TC Board –................................. 25
6-11. Schematic Diagram – VMP Board (1/2) – .................... 26
6-12. Schematic Diagram – VMP Board (2/2) – .................... 27
6-13. Printed Wiring Board – VMP Board – .......................... 28
6-14. Printed Wiring Boards – MAIN/JACK Boards – .......... 29
6-15. Schematic Diagram – MAIN Board (1/2) – .................. 30
6-16. Schematic Diagram
– MAIN (2/2)/JACK Boards –....................................... 31
6-17. Printed Wiring Boards
– CONTROL/LOADING/VIDEO Boards – .................. 32
6-18. Schematic Diagram
– CONTROL/LOADING/VIDEO Boards – .................. 33
6-19. Printed Wiring Board – SWITCH Board – ................... 34
6-20. Schematic Diagram – SWITCH Board – ...................... 35
6-21. Printed Wiring Board – POWER Board – ..................... 36
6-22. Schematic Diagram – POWER Board –........................ 37
6-23. IC Pin Function Description ........................................... 44
TABLE OF CONTENTS
7. EXPLODED VIEWS
7-1. Panel (Side) Section ........................................................ 52
7-2. Front Panel Section ......................................................... 53
7-3. Top Panel Section............................................................ 54
7-4. Chassis Section-1 ............................................................ 55
7-5. Chassis Section-2 ............................................................ 56
7-6. Chassis Section-3 ............................................................ 57
7-7. CD Mechanism Deck (CDM55G-30BD62) ................... 58
7-8. Base Unit Section (BU-30BD62) ................................... 59
8. ELECTRICAL PARTS LIST ............................... 60

4
HCD-M80 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 tape deck section, prepare jig (extension cable J-
2501-167-A: 1.25 mm Pitch, 17 cores, Length 300 mm).
Part No.
Model Name Part No.
Singapore model 4-238-890-0[]
Thai model 4-238-891-0[]
Saudi Arabia model 4-241-755-0[]
TC board (CN301)
main board (CN301)
Connect jig (extension cable J-2501-167-A)
to the main board (CN301) and TC board (CN301).
Ver 1.1
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 [DSG] key, press the [ CD] key for 5 seconds.
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.
Z

5
HCD-M80
SECTION 2
GENERAL This section is extracted from
instruction manual.
Main unit
ALPHABETICAL ORDER
CD N7
CD X7
CD SYNCHRO qd
CD SYNCHRO indicator ws
DIRECTION qs
Disc tray 9
Display window 2
DSG w;
FM MODE qf
FUNCTION wa
MIC jack qa
MIC LEVEL q;
PHONES jack qh
PLAY MODE qg
Remote sensor 4
REPEAT qf
TAPE nN ql
TAPE Xql
TUNER AM qj
TUNER FM qj
TUNING +/– 3
TUNING MODE qg
VOLUME +/– 6
P – V
?/1 (power) 1
m/M 3
l/L 3
x5
ZCD 8
zREC qk
Z
x
nN N
?/1
lm
ML
z
XX
1
3
5
wa
6
7
4
8
9
2
qs qa 0qdqfqgqh
qk
qj
w;
ql
ws
BUTTON DESCRIPTIONS
A – M
Remote Control
@/1 (power) 1
N0
Xqg
xqa
./>9
m/M8
+/– 9
ALBUM +/– qf
BASS/TREBLE wa
CD wf
CLEAR qk
CLOCK/TIMER SELECT w;
CLOCK/TIMER SET 4
DISPLAY 2
DSG qd
ENTER 3
KEY CONTROL 7
K.PON/MPX ql
NEXT 9
Numeric buttons 6
BUTTON DESCRIPTIONS
A – N
ALPHABETICAL ORDER
ON SCREEN wj
PICTURE EFFECT wh
PREV 9
RETURN Owg
SELECT 0
SLEEP qj
SPECIAL MENU qh
TAPE wd
TUNER BAND ws
TUNING MEMORY 5
VOLUME +/– qs
O – V
`/1
X
O
1
3
2
qj
qk
qh
4
5
6
8
7
qs
qf
0
qa
qg
qd
9
`/1
X
O
w;
ql
wa
ws
wd
wf
wj
wg
wh
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 on the remote.
5 Press .or >on the remote
repeatedly to set the minute.
6 Press ENTER on the remote.
The clock starts working.
If youmakea mistake
Press mor Mon the remote until the
incorrect item flashes, then set it again.
To adjusttheclock
1 Press CLOCK/TIMER SET on the remote.
2 Press .or >on the remote to select
“CLOCK SET?”, then press ENTER on the
remote.
3
Do the same procedures as step 3 to 6 above.

HCD-M80
6
SET
3-2. PANEL (SIDE) (L),
PANEL (SIDE) (R)
(page 7)
3-3. TOP PANEL SECTION
(page 7)
3-4. MECHANICAL DECK (TAPE)
(page 8) 3-5. FRONT PANEL SECTION
(page 8)
3-6. BACK PANEL ASSY
(page 9)
3-11.LOADING BOARD
(page 11)
3-12.CAM (CDM55)
(page 12)
3-7. MAIN BOARD
(page 9)
3-8. CD MECHANISM DECK
(CDM55G-30BD62)
(page 10)
3-9. BU HOLDER SECTION
(page 10)
3-10.BASE UNIT
(BU-30BD62)
(page 11)
• This set can be disassembled in the order shown below.
3-1. DISASSEMBLY FLOW
SECTION 3
DISASSEMBLY

HCD-M80
7
Note: Follow the disassembly procedure in the numerical order given.
3-2. PANEL (SIDE) (L), PANEL (SIDE) (R)
3-3. TOP PANEL SECTION
1 four screws
(BTP3
× 10)
2
3 panel (side) (L)
1 screw
(BTP3
× 10)
4 screw
(BTP3
× 10)
4 four screws
(BTP3
× 10)
5
6 panel (side) (R)
3 wire (flat type) (17 core)
(CN301)
4 top panel section
1 screw
(BTP3 × 10
)
2

HCD-M80
8
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)
(FFC) (8 core)
8 TC board
1 flexible flat cable (19 core)
(CN605)
2 connector
(CN304)
3 three screws
(BTP3
× 8)
4 screw
(BTP4
× 8)
5 ground wire
6 front panel section

HCD-M80
9
3-6. BACK PANEL ASSY
3-7. MAIN BOARD
1 connector
(CN301)
VMP board
3 back panel assy
2 four screws
(BTP3
× 8)
2 two screws
(BTP3
× 8)
1 wire (flat type) (25 core)
(CN603)
1 wire (flat type) (17 core)
(CN602)
2 connector
(CN902)
4 main board
3 screw
(BTP3 × 12)

HCD-M80
10
3-8. CD MECHANISM DECK (CDM55G-30BD62)
3-9. BU HOLDER SECTION
1 connector
(CN903)
2 two screws
(DIA. 2.6
× 6)
6 two claws
4 screw
(BVTP3
× 8)
5 boss
5 boss
7 flexible flat cable (28 core
)
(CN101)
8 CD mechanism deck
(CDM55G-30BD62)
3 Open the bracket (MPEG)
in the direction of arrow
A .
1 connector
(CN606)
A
1 floating screw
(PTPWHM2.6)
3 shaft
4 shaft (BU)
5 BU holder section
2 shaft

HCD-M80
11
3-10. BASE UNIT (BU-30BD62)
3-11. LOADING BOARD
6 BU holder (BU-30)
5 three compression spring
5 compression spring
4 base unit (BU-30BD62)
3 two insulators (BU-30
)
3 two insulators (BU-30)
2
1 two screws
(PTPWHM2.6)
1 two screws
(PTPWHM2.6)
2 belt (CDM55)
B
3 Pull the tray pushing B .
4 two screws
(BTP2.6
× 6)
5 loading board
1 Rotate the gear (B) in
the direction of arrow
A .
A

HCD-M80
12
3-12. CAM (CDM55)
2lever (SW)
1torsion spring
6gear (B)
3spacer (55)
4pulley (LDG)
5gear (A)
7roller
8cam (CDM55)

13
HCD-M80
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 ?/1key to turn the power ON.
2. Pressthree keys[FUNCTION],zREC ,and ?/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 ?/1key to turn the power ON.
2. Press three [PLAY MODE/TUNING MODE],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.Thedestination andmodel
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, and TC version this order,
and returns to the 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]
keyispressed whileyear, 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, oncea keyispressed, itis nolongertakenintoaccount.
9. To release this mode, press three keys in the same manner as
step 2, or disconnect the power cord.
[CD 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 ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys [REPEAT/FM MODE], [FUNCTION] and
[DSG] 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 “CD SHIP
(MECHA)” simultaneously.
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys [FUNCTION], [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.
[CDTRAY LOCK MODE]
•This mode is used to unable to take sample disc out of tray in
the shop.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. While pressing the [DSG] key, press the ZCD key.
4. The message “LOCKED” is displayed on the liquid crystal
display and the tray is locked. (Even if pressing the ZCD key,
the message “LOCKED” is displayed on the liquid crystal
display and the tray is locked)
6. To release from this mode, while pressing the [DSG] key, press
the ZCD key for 5 seconds.
7. The message “UNLOCKED” is displayed on the liquid crystal
display and the tray is unlocked.
[REPEAT 5 LIMIT OFF MODE]
Number of repeat for CD playback is 5 times when the repeat mode
is“REPEAT”.This mode enables CDto repeatplayback forlimitless
times.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUNCTION] key to select “CD”.
3. Press three keys [REPEAT/FM MODE], [FUNCTION] and
zREC simultaneously to enter the repeat 5 limit off mode.
[TUNER STEP CHANGE]
(EXCEPT Saudi Arabia model)
•Astep ofAM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press the ?/1key to turn the power ON.
2. Press the [FUCTION] key to select “TUNER” and press the
[TUNER AM] key to turn the “AM”.
3. Press the ?/1key to turn the set OFF.
4. Whilepressing[REPEAT/FM MODE] key, and pressthe ?/1key
and the display of liquid crystal display changes to “AM 9K
Step” or “AM 10K Step”, and thus the channel step is changed
over.
[VCD COLOR SYSTEM MODE ]
•The color system can be changed over PAL, AUTO or NTSC.
Procedure:
1. Set to the standby state.
2. Press the lmand ?/1buttons simultaneously to change
the color system to PAL, and the message “COLOR PAL” is
displayed on the liquid crystal display.
3. Press the MLand ?/1buttons simultaneously to change
the color system to AUTO, and the message “COLORAUTO”
is displayed on the liquid crystal display.
4. Pressthe xand ?/1buttons simultaneouslyto change thecolor
systemto NTSC, andthe message“COLORNTSC” is displayed
on the liquid crystal display.

14
HCD-M80 SECTION 5
ELECTRICAL ADJUSTMENTS
– BD BOARD (Conductor Side) –
TP70
(TE) TP68
(FE)
TP71
(RFDC)
TP73
(DVC)
TP72
(RFAC)
Note: Clear RF signal waveform means that the shape “ ◊” can be clearly
distinguished at the center of the waveform.
TRAVERSE LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP70 (TE) and TP73 (DVC) on the
BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the CD N button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscillo-
scope waveform.
Connecting Location:
Note:
1. CDBlock is basicallydesigned to operatewithout adjustment.Therefore,
check each item in order given.
2. Use LUV-P01 (Part No. 4-999-032-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10MΩimpedance.
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. Connect an oscilloscope to TP68 (FE) and TP73 (DVC) on the
BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and actuate the focus search. (In conse-
quence of open and close the disc tray, actuate the focus search)
4. Confirm that the oscilloscope waveform (S-curve) is symmetri-
cal betweenA and B.And confirm peak to peak level within 2 ±
0.5 Vp-p.
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. Connect an oscilloscope CH1 to TP71 (RFDC), CH2 to TP72
(RFAC) and TP73 (DVC) on the BD board.
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
level=1.2 ±0.55Vp-p symmetry
A (DC voltage
)
center of
waveform
B
DVC
1 track jump waveform
TP70 (TE)
TP73 (DVC)
BD board
+
–
oscilloscope
RF signal waveform VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 0.75 ±0.1Vp-p (RFDC
)
1.05 ±0.3Vp-p (RFAC)
+
–
oscilloscope
TP71 (RFDC)
TP72 (RFAC)
BD board
TP73 (DVC)
symmetry
S-curve waveform
within 2 ±0.5Vp-
p
A
B
+
–
oscilloscope
BD board
TP68 (FE)
TP73 (DVC)
CD SECTION

HCD-M80
1515
Note: Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
1. The adjustments should be performed with the rated power supply
voltage unless otherwise noted.
2. The adjustments should be performed in the order given in this service
manual.
3. The adjustments should be performed for both L-CH and R-CH.
REC BIAS ADJUSTMENT
Procedure:
1. Mode: REC
FUNCTION: MD
2. Mode: Playback
3. Confirm playback the signal recorded in step 1 become speci-
fied values as follows.
If these values are out of specification values, adjust the RV101
(L-CH) and RV201 (R-CH) on the TC board to repeat steps
1and 2.
Specified values:Playback output of 315 Hz to playback
output of 10 kHz: ±0.5 dB
Adjustment Location: TC board
attenuator
set
MAIN board
AUDIO IN (MD/VIDEO) jack (SJ302)
L-CH, R-CH
1) 315 Hz
2) 10 kHz 50 mV (– 23.8 dB)



600 Ω
blank tape
CN-123
AF OSC
+
–
set
recorded
portion
MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH
level meter
0 dB=0.775 V
DECK SECTION
RV101 (L)
RV201 (R)







REC Bias
Adjustment
– TC BOARD (Component Side) –
–VMP BOARD (Component Side) –
TP308
(V-OUT)
TP70
(54 MHz)
TP182
(4.2336 MHz)
TP415
(L-OUT) TP413
(R-OUT)
RV501
Video
Level
Adjustment
VIDEO SECTION
VIDEO LEVEL ADJUSTMENT
(AUDIO LEVEL/VIDEO CLOCK/AUDIO SERVO
CLOCK CHECK)
Procedure :
1. Connect an oscilloscope to TP308 (V-OUT) on the VMP board.
2. Connect a level meter to TP415 (L-OUT) and TP413 (R-OUT)
on the VMP board.
3. Connect a frequency counter to TP70 (54 MHz) and TP182
(4.2336 MHz) on the VMP board.
3. Turn the power ON.
4. Set a test disc (HLV-402 (Part No. 8-909-870-00))
5. Press three buttons [FUNCTION], [DSG] and [DIRECTION]
simultaneously.
6. The message “MPEG AV TEST” is displayed on the liquid
crystal display. Color bar signal outputs and sine-wave (1 kHz
0dB) appears.
7. Adjust the RV501 on the VMP board for 0.714 ±0.05 Vp-p.
Note: TP308 (V-OUT) on the VMP board must be teminated by 75 Ω.
8. Confirm that the value of level meter is 2.5 ±2.0 dBs. (If audio
output disappear, press the [PLAY MODE/TUNING MODE]
button, and the message “CD SERVICE” is displayed on the
liquid crystal display)
9. Confirm that the value of frequency counter is 54 MHz ±400
Hz.
10. Confirm that the value of frequency counter is 4,2336 MHz.
11.Press the [REPEAT/FM MODE] button to change the traverse
ON/OFF, and the message “TRAVERSE ON” or “TRAVERSE
OFF” is displayed on the liquid crystal display.
12.Press the lmbutton to turn the optical pick-up inside
position, and the message “SLED IN” is displayed on the liq-
uid crystal display.
13.Press the MLbutton to turn the optical pick-up outside
position, and the message “SLED OUT” is displayed on the
liquid crystal display.
14. Change disc to a MP3 test disc (MP3 1kHz 0dB sine-wave is
recorded)
15. Confirm that the value of level meter is 2.4 ±2.0 dBs.
+
–
level mete
r
VMP board
TP415 (L-OUT)
TP413 (R-OUT)
VMP board
TP70 (54 MHz)
TP182 (4.2336 MHz) +
–
frequency counte
r
VMP board
TP308 (V-OUT) +
–
oscilloscope
0.714 ± 0.05 Vp-p

HCD-M80
1616
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SERVO Section –
60
SYSRST
VO1–
VO1+
6
7
8
9
16
18
11
10
12
2
1
173
137 138 140 141 142 143
27
26
31
32
34
35
1
2
5
10
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
FF I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
164 FE
160 RFDC
162 TE
163 SE
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR
IC505 (1/2)
MDP
133
SFDR
IN3+
IN4
IN3–
VO3+
VO3–
IN2–
IN2+
IN1–
IN1+
SRDR TFDR TRDR FFDR FRDR
SSTP
135
VO4+
VO4–
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
VO2–
VO2+
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
OPTICAL PICK-UP
BLOCK
(A-MAX. 3)
SW
PD
55
56
47
52
168 170 171 169
FILTER
FILO
PCO
CLTV
FILI
EQ
IN
3
4EQ
AC
SUM
17
FEI
RF DC
AMP 28
RFDCO
29
RFDCI
COIL
DRIVE
COIL
DRIVE
D/A1
D/A3
D/A4
D/A2
LOAD-OUT 67
LOAD-IN 68 6
5IN2
IN1 MOTOR
DRIVE 10
1
OUT2
OUT1
LOADING MOTOR
DRIVER
IC607
D/A
CONVERTER
IC506
M901
(LOADING)
M
SYSTEM CONTROLLER
IC601 (1/4)
• SIGNAL PATH
: CD PLAY
• R-ch is omitted due to same as L-ch.
RFAC
VCA
(LIMIT)
When the optical
pick-up is inner
position
ON :
150 149
XTAO XTAI
X501
33.8688MHz
RFC
26
FREQUENCY
SELECT SWITCH
Q102
93
91
88
124
PCMD
BCK
LRCK
C2PO
111
102
109
113
DATA
CLOK
XLAT
SENS
96
126
98
114
SCOR
SQSO
L SQCK
L SCLK
131
121
105
GFS
L FOK
L CDXRST
189
XTSL
6
5
3
AO5
AO4
AO3
2
13
9
AO2
AO1
AO6
D/A4
D/A2
D/A1
D/A3
HUE
SHARPNESS
STBY
8
RST
4
CLK
DATA
LD
11
12
CLK
10
LD
DI
DATA
BCK
LRCK
C2PO
B
(Page 17)
DATA, BCK,
LRCK, C2PO
CONT
DATA
CLOK
XLAT
SENS
SCOR
SQSO
SQCK
SCLK
GFS
FOK
XRST
C
(Page 17)
A
(Page 17)
DATA, CLK, LD
D
(Page 17)
SYSRST
E
(Page 17)
SHARPNESS, HUE
F
(Page 17)
DATA, CLOK, XLAT, SENS,
SCOR, SQSO, SQCK,
SCLK, GFS, FOK, XRST
15
23 70
69
CLOSE
OPEN
S1
DISC TRAY
OPEN/CLOSE
DETECT
CLOSE
OPEN

HCD-M80
1717
6-2. BLOCK DIAGRAM – AUDIO/VIDEO CD Section –
PROGRAM ROM
IC508
• SIGNAL PATH
: CD PLAY (AUDIO)
: CD PLAY (VIDEO)
DIGITAL FILTER,
D/A CONVERTER
IC504
MPEG VIDEO/AUDIO DECODER,
VIDEO SIGNAL ENCODER
IC505 (2/2)
7
8
VOUTL
VOUTR
1
2
3
DATA
BCK
LRCK
DRADR0 – DRADR10 DRDAT0 – DRDAT15
D0 – D15
D0 – D15
A0 – A10
A0 – A10
74
18
73 72 68
6
7
201
203
204
CPSIG
AUDDTO0
AUDBCK
AUDLRCK
16 MLCK 205
AUDXCLKO
14
13
15
DATA
CLK
LAT
30
29
26
GPIO14
GPIO13
GPIO11
28
GPIO12
CSIG
34 – 37, 39 – 45 49 – 56, 59 – 66
23 – 26, 29 – 34, 22
A0 – A10
12 – 5, 27, 26, 31
D8 – D15
A10 – A17
23, 25, 4, 28, 29, 3, 2, 30
D0 – D7
DQ0 – DQ7
A0 – A9, A18
DQ0 – DQ15
ADDRESS BUS
DATA BUS
D-RAM
IC507
A0 – A10
13 – 15, 17 – 21
WE
24
OE
RAS
CAS
DRCAS DRRAS
DRWEL NVOEL
B.P.F. 1
VOUT
10 VIN
5
CONT IN
6
VOUT
1VIN
5
BGP
8
TINT
B.P.F.
C AMP
IC303
Y AMP
IC304
LOW-PASS
FILER
IC102
70 76 77 78
DRDQM1 DRDQM0
DRBS DRCK
13 14
GPIO1 GPIO0
15 19 18 16
GPIO3 GPIO4
GPIO5 GPIO2
• R-ch is omitted due to same as L-ch.
G
(Page 19)
CD-L
D
(Page 16)
DATA, CLK, LD
F
(Page 16)
SHARPNESS,
HUE
R-CH
2, 4, 5, 7, 8, 10, 11, 13, 42,
44, 45, 47, 48, 50, 51, 53
161720
CLK
BA0
LDQM
3815
UDQM
39
92
90
87
123
L CDDATA
L CDBCK
L CDLRCK
L CDC2PO
110
103
108
112
L DDAT
L DCLK
L XLAT
L SENS
95
125
99
115
L SCOR
L SQSO
SQCK
SCLK
132
120
106
L GFS
FOK
XRST
DATA
BCK
LRCK
C2PO
B
(Page 16)
DATA, BCK,
LRCK, C2PO
DATA
CLOK
XLAT
SENS
SCOR
SQSO
SQCK
SCLK
GFS
FOK
XRST
C
(Page 16)
DATA, CLOK, XLAT, SENS,
SCOR, SQSO, SQCK,
SCLK, GFS, FOK, XRST
24 GPIO9
CONT
A
(Page 16)
81 SYSRST
SYSRST
E
(Page 16)
+3.3V
REGULATOR
Q581
CD +5V
5
VDD
6
VCC
DATA
CLK
LD
SDO SDI SCK SCS SOK SRQ
3
VRF VIDEO
LEVEL
RV501
C SYNC BUFFER
IC302
VIDEO AMP
IC307
Y SYNC BUFFER
Q302
SYNC BUFFER
Q301
SYNC
SEPARATOR
IC301
+
8BUF
IN 1
BUF
OUT 6
OUT
5
OUTSAG
3IN
2
STBY
VIDEO MUTING
CONTROL SWITCH
Q370
J700
VIDEO OUT
HUE
SHARPNESS
(Page 19)
V MUTE
H
(Page 19)
SDO, SDI, SCK,
SCS, SOK, SRQ
J
207 206
CLKB CLKA
X502
27MHz

HCD-M80
1818
6-3. BLOCK DIAGRAM –TUNER/TAPE DECK Section –
MUTING
CONTROL SWITCH
Q404, 405
11
ALC
TU1
TUNER UNIT
FM75Ω
ANENNA
AM
4
3
5
9
8
10
7
57
23
27
22
25
80
59
CAPSTAN/REEL
MOTOR DRIVE
Q341, 343
58
38
90
91
TRIGGER
PLUNGER DRIVE
Q342, 344
MM
(TAPE DECK BLOCK)
(CAPSTAN/REEL)
SIGNAL PATH
: TUNER (FM/AM)
: TAPE PLAY
: REC
FM ANT
ANT GND
ANT GND
AM ANT
L-CH
R-CH R-CH
TUNED
DI
CK
CE
DO
SYSTEM CONTROLLER
IC601 (2/4)
TUNED
ST-DOUT
ST-CLK
ST-CE
ST-DIN
ALC
43
TC-RELAY
CAPM-CNT1
B TRG
B PLAY
B SHUT
B HALF/REC
R-CH : R-ch is omitted due to same as L-ch.
41
REC-MUTE
39
TC-MUTE
34 BIN (L)
1513 14
28
EQ-OUT (L)
26
PB-OUT
(L)
TAI (L) MUTE
REC/PB EQ AMP, ALC
IC401
A/B
MUTE
REC-MUTE
24
23
REC-OUT
(L)
REC-IN
(L)
ALC
(L)
21
R-CH
R-CH
EQ
ALC
BIAS OSC
T401 REC BIAS
SWITCH
Q402, 403
COM +8V
BIAS OSC
Q401
REC BIAS
(L)
MUTING
Q100, 101
RV101
REC BIAS
(R)
RV201
L-CH
R-CH
ERASE
R-CH
HRPE901
(RECORD/PLAYBACK/ERASE)
R-CH
R-CH
T101
BIAS
TRAP
K
TU-L (Page 19)
L
TC-L (Page 19)
M
REC-L (Page 19)
27

HCD-M80
1919
6-4. BLOCK DIAGRAM – MAIN Section –
RV500
MIC LEVEL
: TAPE PLAY
: REC
: CD PLAY
: TUNER (FM/AM)
87 88 86 89
STK MUTE
50
HEAD PHONE DETECT
81
LINE-MUTE
KTU-L
(Page 18)
LTC-L
(Page 18)
GCD-L
(Page 17)
MREC-L
(Page 18)
INPUT SELECT SWITCH,
ELECTRICAL VOLUME,
TONE CONTROL
IC323
POWER ON
MUTING
Q330
MUTING
CONTROL SWITCH
Q312, 313
3
COM +12V
D309
MUTING
Q408, 409
MUTING
Q100
4
10
14
+
+
–
–
SJ301
L
R
SPEAKER
IMPEDANCE
USE 6 – 16Ω
R-CH
R-CH J501
HEADPHONE AMP
IC324
MOS GAIN &
LEVEL SHIFT
ING STAGE
MOS
OUTPUT
STAGE
SHORT
CIRCUIT
PROTECTION
IN+
IN+
MUT
STANDBY/MUTE
MUTE STBY
POWER AMP
IC101
R-CH
OUT
R-CH
R-CH
DC DETECT
Q310, 311
PHONES
100
DC-DETECT
R-CH
INPUT
SELECT
SWITCH
L4
L3
L1
L2
11
12
14
13 9LIN
10
LSELO 5 LOUT
VOLUME
CONTROL
TONE
CONTROL
30
1
DI
CL
2
CE
CPU
INTERFACE
R-CH
SJ302
L
R
AUDIO IN
MD (VIDEO)
9
R-CH
AMP-DATA
AMP-CLK
AMP-CE
84
STK-POWER
SYSTEM CONTROLLER
IC601 (3/4)
8 10 4
9 11 3
INVERTER
IC603 (1/2)
12 2
13 1
INVERTER
IC603 (2/2)
SIGNAL PATH
: MD (VIDEO)
R-CH : R-ch is omitted due to same as L-ch.
: MIC INPUT
MIC
J502 MIC AMP
IC525 (1/2)
MIC AMP
IC525 (2/2)
R-CH
MUTING
Q604
MUTING CONTROL
SWITCH
Q606, 607
V MUTE
(Page 17) H
(Page 17)
33 VIDEO MUTE
66 CD MUTE
35
36 SYSIN
SYSOUT
37
19
56
54 SYSRQ
SYSOK
SYSCS
SYSCLK
SDO
SDI
SCK
SCS
SOK
SRQ
J
SDO, SDI, SCK,
SCS, SOK, SRQ
D313

HCD-M80
2020
6-5. BLOCK DIAGRAM – KEY CONTROL/POWER SUPPLY Section –
97, 95, 94
KEY0 – KEY2
LIQUID CRYSTAL
DISPLAY
LCD502
SIRCS
4
12RESET
D500
D604
SYSTEM CONTROLLER
IC601 (4/4)
D514
(STANDBY)
LED DRIVE
Q505 LED547
LED1
42
LED DRIVE
Q503 LED345
LED DRIVE
Q502
TUNER
D502
LED7
49
LED DRIVE
Q501
CD
D501
LED6
48
LED DRIVE
Q506
82
STBY-RELAY
RECT
D906 – 909
RECT
D902 – 905
+4V
REGULATOR
IC904
AMP +22.5V
AMP – 22.5V
D921
RECT
D910 – 913
D506 – 509
(LCD BACK LIGHT)
TU +9.5V
COM +8V
COM +12V
40TUNER ON
65CD-POWER
U-COM +3.3V
+3.3V
LCD B+
T902
MAIN POWER
TRANSFORMER
T901
SUB POWER
TRANSFORMER
RY901 (Singapore, Saudi Arabia)
(Thai)
(AC IN)
VOLTAGE
SELECTOR
S901
BACKUP +4V
S513, 514, 517 – 521,
S523 – 528, 530, 531,
S587, 590, 593, 594
10
11
X601
32.768KHz
15
13
X602
16MHz
XCIN
XCOUT
XIN
XOUT POWER ON/OFF
RELAY DRIVE
Q902
+5V
+8V
REGULATOR
IC304
LCD STB 6
LCD RS 3
LCD DATA 5
LCD SCK 7
20
AC-CUT
REMOTE CONTROL
RECEIVER
IC502
D920, 922
D622 RESET SWITCH
Q618
B+ SWITCH
Q635, 637
LED B+
+14V
+5V
REGULATOR
IC605
TC +3.3V
+3.3V
REGULATOR
Q309
M+7V
+8V
REGULATOR
IC901
RECT
D914 – 917
74 POWER KEY
S503
51
BACK LIGHT
B+ SWITCH
Q601
B+ SWITCH
Q507, 508
LED DRIVE
Q504
TAPE
D504
LED4
46
CD SYNCHRO
D505
DSG
D503
D919
STANDBY
SWITCH
Q602, 603
CD +5V
+12V
REGULATOR
Q355
+12V
MIC AMP B+
+12V
REGULATOR
IC305
+5V
REGULATOR
IC606
+9.5V
REGULATOR
Q305
CD ON
SWITCH
Q307, 308
CD +3.3V
+3.3V
REGULATOR
IC202
CD +2.5V
+2.5V
REGULATOR
IC201
CD +4.5V
+4.5V
REGULATOR
Q201
+9.5V
REGULATOR
Q301
RESET SIGNAL
GENERATOR
IC602
RESET SWITCH
Q619
TUNER ON
SWITCH
Q303, 304