Sony HCD-VX99 Service manual

HCD-VX99
SERVICE MANUAL
HCD-VX99 is the tuner, deck, CD and amplifier section in MHC-VX99.
CD
SECTION
TAPE DECK
SECTION
CD Mechanism Type CDM58-K2BD37A
Base Unit Type BU-K2BD37A
Optical Pick-up Type KSM-213DAP/Z-NP
Tape Transport Mechanism Type TCM-230PWR11
E Model
Amplifier section
The following measured at AC 120, 220, 240V 50/60 Hz DIN power output (rated) 220 + 220 W
Continuous RMS power output (reference)
Inputs MD/VIDEO (AUDIO) IN:voltage 450 mV/250 mV, (phono jacks) impedance 47 k MIC: sensitivity 1 mV, (phone jack) impedance 10 k
Outputs VIDEO OUT: max. output level 1 Vp-p, (Phono jack) unbalanced, Sync
S-VIDEO OUT: Y: 1 Vp-p, unbalanced (4 pin/mini-DIN jack) Sync negative
PHONES: accepts headphones of 8 (stereo mini jack) or more FRONT SPEAKER:
(4 at 1 kHz, DIN)
300 + 300 W (4 at 1 kHz, 10% THD)
negative, load impedance 75
C: 0.286 Vp-p load impedence 75
accepts impedance of 4 to 16
SPECIFICATIONS
VIDEO CD/CD player section
System Compact disc and digital
Laser Semiconductor laser
Laser output Max. 44.6
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 Video color system format
CD OPTICAL DIGITAL OUT (Square optical connector jack, rear panel) Wavelength 660 nm Output Level –18 dBm
audio system
(λ=780nm) Emission duration: continuous
*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.
NTSC, PAL
µ
W*
Tape player section
Recording system 4-track 2-channel stereo Frequency response (DOLBY NR OFF)
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 unbalanced Intermediate frequency 10.7 MHz
AM tuner section
Tuning range Middle East model: 531 – 1,602 kHz
Other models: 531 – 1,602 kHz
Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz
40 – 13,000 Hz (±3 dB), using Sony TYPE I cassette
(with the interval set at 9 kHz)
(with the interval set at 9 kHz) 530 – 1,710 kHz (with the interval set at 10 kHz)
— Continued on next page —
COMPACT DISC DECK RECEIVER
1
General
Power requirements
Power consumption
120 V, 220 V or 230 - 240 V AC, 50/60 Hz Adjustable with voltage selector
300 W
TABLE OF CONTENTS
1. SERVICE NOTE ······························································· 4
2. GENERAL ·········································································· 5
3. DISASSEMBLY ································································ 7
Dimensions (w/h/d)
Mass:
Supplied accessories: AM loop antenna (1)
Design and specifications are subject to change without notice.
Approx. 280 x 360 x 425 mm (11x 14 in.)
Approx. 11 kg (24 lb. 5 oz)
Remote commander (1) Batteries (2) Video cable (1) FM lead antenna (1) Front speaker pads (8)
3
/16 x 1611/
4. TEST MODE ···································································· 12
16
5. MECHANICAL ADJUSTMENTS ····························· 17
6. ELECTRICAL ADJUSTMENTS ······························· 17
7. DIAGRAMS
7-1. Circuit Board Location ····················································· 23 7-2. Block Diagrams ································································ 25 7-3. Printed Wiring Board – BD Section – ······························ 28 7-4. Schematic Diagram – BD Section – ································· 29 7-5. Printed Wiring Board – Video Section – ·························· 30 7-6. Schematic Diagram – Video (1/3) Section – ···················· 31 7-7. Schematic Diagram – Video (2/3) Section – ···················· 32 7-8. Schematic Diagram – Video (3/3) Section – ···················· 33 7-9. Printed Wiring Board – Main Section – ··························· 34 7-10. Schematic Diagram – Main (1/3) Section – ····················· 35 7-11. Schematic Diagram – Main (2/3) Section – ····················· 36 7-12. Schematic Diagram – Main (3/3) Section – ····················· 37 7-13. Printed Wiring Board – Power AMP Section – ················ 38 7-14. Schematic Diagram – Power AMP Section – ··················· 39 7-15. Printed Wiring Board – Panel Section – ··························· 40 7-16. Schematic Diagram – Panel Section – ····························· 41 7-17. Printed Wiring Board – Leaf SW Section – ····················· 42 7-18. Schematic Diagram – Leaf SW Section – ························ 43 7-19. Printed Wiring Board – Driver Section – ························· 44 7-20. Schematic Diagram – Driver Section – ···························· 45 7-21. Printed Wiring Board – Trans Section – ··························· 46 7-22. Schematic Diagram – Trans Section – ····························· 47 7-23. IC Pin Function ································································ 48 7-24. IC Block Diagrams ··························································· 57
8. EXPLODED VIEWS
8-1. Main Section ····································································· 61 8-2. Panel Section ···································································· 62 8-3. Main Board Section ·························································· 63 8-4. Tape Mechanism Deck Section ········································ 64 8-5. CD Mechanism Deck Section (CDM58-K2BD37A) ······· 65 8-6. Base Unit Section (BU-K2BD37A) ································· 66
9. ELECTRICAL PARTS LIST ······································· 67
2
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT
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 pick­up block. Therefore, when checking the laser diode emission, observe from more than 30 cm away from the objective lens.
Laser component in this product is capable of emitting radiation exceeding the limit for Class 1.
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.
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 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.
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.
3
SECTION 1
H
g
g
H
H
g

SERVICE NOTE

2
Panel board
Note for installing the panel board
Hot melt
Screw hole
1
Cut the eleven melted-connection points with a cutting plier.
Attach the panel board with six screws (
+BVTP 2.6 × 8
) after the board is removed once. Do not tighten the screws excessively.
SELF-DIAGNOSIS
This model has the self-diagnosis function for the VIDEO and AUDIO decoder sections. Connecting to the LED between TP522 and TP523 on the VIDEO BOARD. Immediately after the power on, the self-diagnosis function searches each operation of IC’s around the mechanism control microcomputer (IC701). and TP5 The results can be checked by LED of the VIDEO board.
Oscilloscope (Waveform) Symptom
No error
Li
ht
L
MPEG decoder (IC505) error
2 time blinkin
L
[VIDEO BOARD] (SIDE A)
TP523 TP522
LED
IC505
91
90
65
64
100
1
32
33
MPEG decoder (IC505) or
L
3 time blinkin
DRAM (IC507) error
4
SECTION 2
12345
6
7
qd qf
qgqh
el
ed
r;
ef
wh
wj wk
ea
8
qa qs
9 q;
es
ej
qk qj
ws
wd
wf
wg
w;
ql
wa
ek
eg
eh
wl
e;

GENERAL

1 DISC SKIP EX-CHANGE button 2 DISC 1 button and indicator 3 DISC 2 button and indicator 4 DISC 3 button and indicator 5 Z OPEN/CLOSE button 6 PREV button 7 NEXT button 8 RETURN button 9 EDIT, TUNER MOMERY button q; PLAY MODE, STEREO/MONO button qa REPEAT, DOLBY NR button qs DIRECTION button qd VOLUME knob qf PHONES jack qg ENTER button qh REC PAUSE/START button and indicator qj CD SYNC HI-DUB button qk KARAOKE PON/MPX button ql MIC1, MIC2 jack w; MIC LEVEL knob
wa ECHO LEVEL knob ws EQ EDIT button wd SPECTRUM button wf DISPLAY button wg ?/1 button and indicator wh Function indicator wj TUNER/BAND button wk CINEMA SPACE button wl MD (VIDEO) button e; gG/SELECT button ea > + button es X button ed – . button ef x button eg V-GROOVE button and indicator eh PICTURE EFFECT button ej CURSOL button and indicator ek GROOVE button el TAPE A/B button r; CD button
5
This section is extracted from
7
Inserting two size AA (R6)
batteries into the remote
Using the remote
You can use the shaded buttons shown below
to operate a Sony TV.
To Press
Turn the TV on or off TV ?/1
Switch the TV's TV/VIDEO.
video input
Change the TV TV CH +/–.
channels
Adjusts the volume TV VOL +/–.
of the TV speaker(s)
Tip
With normal use, the batteries should last for about
six months. When the remote no longer operates
the system, replace both batteries with new ones.
Note
If you do not use the remote for a long period of
time, remove the batteries to avoid possible damage
from battery leakage.
When carrying this system
Do the following to protect the CD
mechanism.
1 Make sure that all discs are removed from
the unit.
2 Hold down CD and then press ?/1 so that
“LOCK” appears in the display.
3 Unplug the AC power cord.
1
Press CLOCK/TIMER SET.
The hour indication flashes.
2
Press . or > repeatedly to set
the hour.
Step 2: Setting the
time
You must set the time before using the timer
functions.
continued
NX x
xMm>.
nN
O
v
V
bB
X
1
3,5
2,4
TV ?/1
TV VOL +/
TV CH +/
TV/VIDEO
8
1
Press TUNER/BAND repeatedly
until the band you want appears in
the display.
Every time you press this button, the
band changes as follows:
FM y AM
Step 3: Presetting
radio stations
You can preset 20 stations for FM and 10
stations for AM.
?/1
(Power)
3
Press ENTER.
The minute indication flashes.
4
Press . or > repeatedly to set
the minute.
5
Press ENTER.
The clock starts working.
Tip
If youve made a mistake, start over from step 1.
To change the time
The previous explanation shows you how to set the
time while the power is off. To change the time
while the power is on, do the following:
1 Press CLOCK/TIMER SET.
2 Press . or > repeatedly to select
SET CLOCK.
3 Press ENTER.
4 Perform steps 2 through 5 above.
Note
The clock settings are canceled when you disconnect
the power cord or if a power failure occurs.
Step 2: Setting the time
(continued)
SHUTTLE
42
13
instruction manual.
6
SECTION 3

DISASSEMBLY

Note : Follow the disassembly procedure in the numerical order given.
3-1. UPPER CASE (TOP)
5
Two screws (Case)
Side panel L
6
Screw (Case)
Upper case (Top)
7
Two screws
(+BVTP 3
×
8
10)
q;
9
Two screws (+BVTP 3
Claw
Side panel R
4
×
10)
3-2. LOADING PANEL ASSY
CD mechanism deck (CDM58)
1
Turn the pulley to the direction of arrow.
pulley
Front panel side
2
Pull-out the disc tray.
Loading panel assy
3
1
Two screws (Case)
2
Screw (Case)
3
Two screws
(+BVTP 3
×
10)
7
)
3-3. FRONT PANEL SECTION
)
CD mechanism deck (CDM58)
4
Screw (+BVTP 3
7
×
10)
qs
1
Flat type wire (CN304)
5
Screw (+BVTP 3
2
Connector (CN1)
8
Connector (CN201)
Connector (CN601)
×
10)
0Tw o
screws (+BVTP 2.6
×
8
6
Three screws (+BVTT 3
3-4. TAPE MECHANISM DECK
×
9
3
Connector (CN2)
Front panel section
6)
4
Bracket (Heart cam L)
3
Screw (+BVTP 2.6
5
Five screws (+BVTP 2.6
Connector (CN202)
×
8)
×
8)
1
Screw (+BVTP 2.6
×
8
2
Bracket (Heart cam R)
6
Tape mechanism deck
8
d
)
3-5. PANEL BOARD
7
Knob(MIC)
6
Spring
2
Two screws
(+BVTP 2.6
×
8)
1
Knob (Volume)
4
Bracket (FR)
5
FR knob
3
Two bosses & four pins
0
Three claws
8
9
Three screws
(+BVTP 2.6
qa
CD Switch boar
qf
Panel board
qd
Five claws
qs
Cut the eleven melted-connection points with a cutting plier.
When attching the panel board,
Note:
refer to "Service Note" on page 4.
×
8)
3-6. TRANS BOARD
6
Connector (CN977)
7
Two screws (+BVTT 4
5
Connector (CN975)
0
Trans board
×
8)
9
Trans
8
Two screws
(+BVTT 4
×
4
Panel, back
2
Six screws
(+BVTP 3
8)
1
Two screws
(+BVTP 3
3
Connector (CN891)
×
10)
×
10
9
)
3-7. MAIN BOARD AND AMP BOARD
4
Three screws (+BVTP 3
×
8)
7
Heat sink
6
Two screws (+BVTP 3
×
8)
5Powe r
3
Two screws (+BVTP 3
AMP board
×
16)
Connector (CN503)
Connector(CN502)
2
Main board
1
Two screws (+BVTP 3
×
8
3-8. LEAF SW BOARD, HEAD (A) BOARD AND HEAD (B) BOARD
1
Five claws
7
Remove the four solderings.
4
Head (A) board
5
3
Screw (+PS 2.6
×
5)
Head (B) board
2Leaf
SW board
10
6
Screw (+PS 2.6
×
5)
d
3-9. BASE UNIT
5
Two insulators
Base unit
3
4
Two insulators
1
Flat type wire (CN101)
2
Four screws (+PTPWH 2.6)
3-10. DRIVER BOARD, MOTOR BOARD SENSOR BOARD AND VIDEO BOARD
9
q;
Tray
3
Connector (CN701)
1
Screw (+BVTP 2.6
Screw (+PTPWH 2.6
qa
Screw (+BVTP 2.6
2
Driver board
×
8)
6
Motor board
×
×
8)
8)
4
Three screws (+BVTP 2.6
7
Flat type wire (CN721)
5
Remove the two solderings of motor.
8
Connector(CN722)
qs
Sensor board
×
8)
qd
Two screws (+BVTP 2.6
×
qf
Video boar
8)
11
SECTION 4

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 three buttons x , ENTER , and ?/1 simulta-neously.
2. The fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[CD Ship Mode]
• This mode moves the pickup to the position durable to vibra­tion. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press CD button and ?/1 button simultaneously.
3. After the "STANDBY" display blinks six times, a message
“LOCK” is displayed on the fluorescent indicator tube, and the CD ship mode is set.
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.
Procedure:
1. Press three buttons x , ENTER , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pickup.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “CD”.
3. Press three buttons x , ENTER , and OPEN/CLOSE simul-
taneously.
4. The CD service mode is selected.
5. With the CD in stop status, turn the shuttle knob clockwise to
move the pickup to outside track, or turn the shuttle knob counter-clockwise to inside track.
6. To exit from this mode, perform as follows:
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.
Note: • Always move the pickup to most inside track when exiting from
this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
[Change-over of MW Tuner Step between 9 kHz and 10 kHz]
• A step of MW channels can be changed over between 9 kHz and 10 kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND
button to select the BAND “MW”.
3. Press ?/1 button to turn the set OFF.
4. Press ENTER and ?/1 buttons simultaneously, and the display
of fluorescent indicator tube changes to “MW 9 k STEP” or “MW 10 k STEP”, and thus the channel step is changed over.
[GC Test Mode]
• This mode is used to check the software version, FL tube, LED, keyboard and VACS.
Procedure:
1. Press three buttons x , ENTER , and DISC 2 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When you want to enter the software version display mode,
press DISC 1 . The model number and destination are displayed.
4. Each time DISC 1 is pressed, the display changes starting
from MC version, GC version, VC version, CD version, CM version, ST version, TC version, TA version, TM version and BR version in this order, and returns to the model number and destination display.
5. When DISC 3 is pressed while the version numbers are being
displayed except model number and destination, year, month and day of the software creation appear. When DISC 3 is pressed again, the display returns to the software version display. When DISC 1 is pressed while year, month and day of the software creation are being displayed, the year, month and day of creation of the software versions are displayed in the same order of version display.
6. Press DISC 2 button, and the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“KEY0 VOL0”. Each time a button is pressed, “KEY” value increases. However, once a button is pressed, it is no longer taken into account. “VOL” value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “–” direction.
8. Also when DISC 3 is pressed after lighting of all LEDs and FL
tubes, value of VACS appears.
9. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
[VACS ON/OFF Mode]
• This mode is used to switch ON and OFF the VACS (Variable Attenuation Control System).
Procedure:
Press the ENTER and SPECTRUM buttons simultaneously. The message “VACS OFF” or “VACS ON” appears.
12
[MC Test Mode]
• This mode is used to check operations of the respective sections of Amplifier, Tuner, CD and Tape.
Procedure:
1. Press the ?/1 button to turn on the set.
2. Press the three buttons of x , ENTER and DISC 3
simultaneously.
3. A message “TEST MODE” appears on the FL display tube. 4 When f (CURSOR UP) button is pressed, GEQ increases to
its maximum and a message “GEQ ALL MA” appears.
5. When F (CURSOR DOWN) button is pressed, GEQ decreases
to its minimum and a message “GEQ ALL M1” appears.
6. When g (CURSOR LEFT) or G (CURSOR RIGHT) button
is pressed, GEQ is set to flat and a message “GEQ FLAT” appears.
7. When the VOLUME control knob is turned clockwise even slightly, the sound volume increases to its maximum and a message “VOLUME MAX” appears for two seconds, then the display returns to the original display.
8. When the VOLUME control knob is turned counter-clockwise even slightly, the sound volume decreases to its minimum and a message “VOLUME MIN” appears for two seconds, then the display returns to the original display.
9. In the test mode, the default-preset channel is called even when the TUNER is selected and an attempt is made to call the preset channel that has been stored in memory, by operating the Shuttle knob. (It means that the memory is cleared.)
10. When CD is selected and the EDIT button is pressed, the disc that is being chucked at this moment becomes the default setting. It means that the default disc only is accessed when any other discs are selected even though the display indication changes accordingly. At the same time, the DISC SKIP EX­CHANGE and OPEN/CLOSE cannot be accepted. (It means that the tray motor and the turntable motor are disabled of their operation.)
11. When a tape is inserted in Deck B and recording is started, the input source function selects VIDEO automatically.
12. When x button is pressed to stop recording, the Tape (Deck) B is selected and tape is rewound using the Shuttle knob, tape is rewound, tape is stops at around the record-starting position and playback of the recorded portion of the tape is started. If PAUSE is inserted even once during recording, tape is rewound to the position around the PAUSE position and is played back.
13. When the CD SYNC HI-DUB Button is press during playback of Deck B, either normal speed or high speed can be selected by this button.
14. Select the desired loop by pressing the PLAY MODE button. Insert a test tape AMS-110A or AMS-RO to Deck A.
15. Press the SPECTRUM button to enter the AMS test mode.
16. After a tape is rewound first, the FF AMS is checked, and the mechanism is shut off after detecting the AMS signal twice.
17. Then the REW AMS is checked and the mechanism is shut off after detecting the AMS signal twice.
18. When the check is complete, a message of either OK or NG appears.
19. When you want to exit this mode, press the ?/1 button twice. The cold reset is enforced at the same time.
13
[Aging Mode]
This mode can be used for operation check of CD section and tape deck section.
• If an error occurred: The aging operation stops and display status.
• If no error occurs: The aging operation continues repeatedly.
1. Operating method of Aging Mode
Turn on the main power and select “CD” of the function.
1) Set a disc in DISC1 tray. Select ALL DISC CONTINUE, and REPEAT OFF.
2) Load the tapes recording use into the decks A and B respectively.
3) Press three buttons x , ENTER , and
DISC SKIP/EX-CHANGE simultaneously.
4) Aging operations of CD and tape are started at the same time.
5) To exit the aging mode, perform [MC Cold Reset].
3. Aging Mode in CD section
1) Display state
• No error occurs
Display
AGING[*][*][*][*]
Note:
[*][*][*][*]
Error display
E ** s ## $$ %%
12 34 5
1 **
2 s 3 ##
4 $$
5 %%
: Number of aging operations
The error No. 00 indicates the newest error. As the error No. increases, it means the older error. When you want to retrieve the error history, press the PLAY MODE button in the case of mechanism error. Or press the REPEAT button in the case of NO DISC error.
M: Mechanism error
Don’t care
High order digits only D: Stopped during closing due to problems other than mechanism. E: Stopped during opening due to problems other than mechanism. C: Stopped during chucking due to problems other than mechanism. F: Stopped during EX-opening due to problems other than mechanism.
Emergency related errors (High order digits only) 1: Stopped during chuck-up 2: Stopped during chuck-down 3: Time out by EX-OPEN 5: Time out by EX-CLOSE
D: No disc error
01: FOCUS ERROR 02: GFS ERROR 03: SETUP ERROR
01: NO DISC judgment without chucking retry 02: NO DISC judgment after chucking retry
Status at the time of NO DISC judgment (High order digits only) 1: STOP 2: SETUP 3: TOC READ 4: ACCESS 5: PLAY BACK 6: PAUSE 7: MANUAL SEARCH (PLAY) 8: MANUAL SEARCH (PAUSE)
• When the buttons x , ENTER and DISC 1 are pressed simultaneously, number of time of the mechanism error and the NO DISC error can be checked. Display: EMC**EDC** **: Number of times of error (Maximum three times)
EMC: Mechanism error EDC: NO DISC error
• When aging operation is complete, be sure to perform the MC Cold Reset to reset the error history.
14
2) Operation during aging mode In the aging mode, the program is executed in the following sequence. (1) The disc tray opens and closes. (2) The mechanism accesses DISC 2 and makes an attempt to
read TOC. However, since there are no discs, a message “CD2 NO DISC” appears.
(3) The mechanism accesses DISC 3 and a message “CD3 NO
DISC” appears. (4) The disc tray turns to select a disc1. (5) A disc is chucked. (6) TOC of disc is read. (7) The pickup accesses to the track 1, and playing 2 seconds. (8) The pickup accesses to the last track, and playing 2 seconds. (9) Every time when an aging operation of step 1 to step 8 is
complete, the display “AGING[*][*][*][*]” value increases
as the number of aging operations is counted up. (10) Returns to step 1.
3. Aging Mode in Tape Deck section
1) Display state
• No error occurs
Display action now
• Error occurred
Display action last time
NO. Display action Action contents Final timing
1 TAPE A AG-1 Rewind the TAPE A, B The top of tape
2 TAPE A AG-2 FWD play the TAPE A 2 minutes playing
3 TAPE A AG-3 F.F. the TAPE A 20 second FF or the end
4 TAPE A AG-4 REV play the TAPE A 2 minutes playing
5 TAPE A AG-5 Rewind the TAPE A The top of tape
6 TAPE B AG-2 FWD play the TAPE B 2 minutes playing
7 TAPE B AG-3 F.F. the TAPE B 20 second FF or the end
8 TAPE B AG-4 REV play the TAPE B 2 minutes playing
9 TAPE B AG-5 Rewind the TAPE B The top of tape
of tape
of tape
2) Operation during aging mode In the aging mode, the program is executed in the following sequence. (1) Rewind is executed up to the top of tape A and B. (2) A tape on FWD side is played for 2 minutes. (3) FF is executed up to either made for 20 second or the end of
tape.
(4) A tape is reversed, and the tape on REV side is played for 2
minutes. (5) Rewind is executed up to the top of tape. (6) Returns to step 2, and repeat steps from 2 to 5.
[Function Change Mode]
* elect either VIDEO or MD of the external FUNCTION input.
Procedure:
1. Turn on the power.
2. Press the two buttons ENTER and ?/1 at the same time.
The main power is turned on and the other function of the previous function is selected and displayed. “MD” or “VIDEO”.
15
VIDEO CD COLOR-BARS MODE
On this mode, the data of the color-bars signal as a picture signal and the 1kHz sine wave signal as a sound signal are output by the mechanism control microcomputer (IC502) for video CD signal check. When measurement of the voltage and waveform on the VIDEO board, perform it in this mode. For reference, the color-bars signal can be observed at J302 (VIDEO OUT) and the sound signal can be observed at J101 (VIDEO/MD (AUDIO) OUT) using an oscilloscope.
1. Connect the lead wire to both ends of the land of SL503 of the VIDEO board.
2. Turn the power on. Press CD button to select CD.
3. After 2 or 3 seconds later, connect the lead wire.
4. After measuring, remove the lead wire connected.
[VIDEO BOARD] (SIDE A)
SL501 SL502
TEST MODE
[VIDEO BOARD] (SIDE B)
SL503
CT503
VIDEO FREQUENCY
IC505
IC507
16
TEST
MODE
SL503 SL502 SL501
IC502
SECTION 5

MECHANICAL ADJUSTMENTS

SECTION 6

ELECTRICAL ADJUSTMENTS

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
demagnetizer.
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
supply voltage unless otherwise noted.
Torque Measurement
Mode
FWD
FWD back tension
REV
REV back tension
FF/REW
FWD tension
REV tension
Torque meter
CQ-102C
CQ-102C
CQ-102RC
CQ-102RC
CQ-201B
CQ-403A
CQ-403R
Meter reading
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)
DECK SECTION
1. Demagnetize the record/playback head with a head demagnetizer.
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 supply 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 adjustment.)
6. The adjustments should be performed for both L-CH and R­CH.
7. Switches and controls should be set as follows unless otherwise specified.
• Test Tape
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
Record/Playback Head Azimuth Adjustment
0 dB=0.775 V
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
test tape P-4-A100 (10 kHz, –10 dB)
main board CN301 Pin 3 (L-CH) Pin 1 (R-CH)
set
main board CN301 Pin 2 (GND)
level meter
+ –
17
2. Turn the adjustment screw and check output peaks. If the peaks
(
)
r
(
)
do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
Output level
within 1dB
L-CH peak
R-CH peak
within 1dB
Screw position
L-CH peak
Screw position
R-CH peak
Tape Speed Adjustment DECK B
Note: Start the Tape Speed adjustment as below after setting to the test
mode. In the test mode, the tape speed is high during pressing the
CD SYNC HI-DUB button.
Procedure:
1. Turn the power switch on.
2. Press the x button, ENTER button and DISC 3 button
simultaneously. (The TEST MODE on the fluorescent indicator tube display while in the test mode.) To exit from the test mode, press the ?/1 button.
Mode: Playback
test tape WS-48B (3 kHz, 0 dB)
frequency counte
3. Mode: Playback
test tape P-4-A100 (10 kHz, –10 dB)
L-CH
MAIN board CN301 set
R-CH
waveform of oscilloscope
in phase 45 ° 90° 135° 180 °
pin 3
pin 2
L
R
pin 1
good
oscilloscope
V
wrong
H
4. After the adjustments, apply suitable locking compound to the pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
set
main board CN301 (Pin 3 : L-CH)
Pin 1 : R-CH
+
1. Insert the WS-48B into the deck B.
2. Press the gG button on the deck B.
3. Press the CD SYNC HI-DUB button in playback mode. Then at HIGH speed mode.
4. Adjust RV1001 on the LEAF SW board do that frequency counter reads 6,000 ± 30 Hz.
5. Press the CD SYNC HI-DUB button. Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency counter reads 3,000 ± 15 Hz.
Adjustment Location: LEAF SW board
Playback level Adjustment DECK A DECK B
Procedure:
Mode: Playback
test tape P-4-L300 (315 Hz, 0 dB)
set
level meter
+
18
forward
reverse
main board CN301 (Pin 3 : L-CH)
Pin 1 : R-CH
Deck A is RV302 (L-CH) and RV352 (R-CH), Deck B is RV303 (L-CH) and RV353 (R-CH) so that adjustment within adjustment level as follows.
Adjustment Level:
CN301 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level difference between the channels: within ±0.5 dB
Adjustment Location: MAIN board
Sample Volue of Wow and Flutter: 0.3% or less W. RMS
(WS-48B)
REC Bias Adjustment DECK B
(
)
set
MD/VIDEO (AUDIO) IN 315 Hz, 50 mV (–23.8 dB)
blank tape CS-123
600
attenuator
AF OSC
(
)
T601
RV611
RV351
RV354
RV304
RV303
RV352
RV302
RV353
RV301
CN301
CN304
CN302
CN303
13
REC LEVEL (L)
(B)
PB LEVEL (L)
(B)
PB LEVEL (R)
(A)
PB LEVEL (L)
(A)
PB LEVEL (R)
(B)
REC LEVEL (R)
(A)
REC LEVEL (L)
(A)
REC LEVEL (R)
(B)
Procedure:
INTRODUCTION When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the REC memory mode which rewinds only the recorded portion and playback is set. This REC memory mode is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO. (If do not operation of stopped from recording complete, and rotette of shuttle knob then rewind to recording start position.)
4. Mode: Record
5. Mode: Playback
1. Press MD/VIDEO button to select VIDEO. (This step is not necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press REC PAUSE/START button, press REC PAUSE/ START button, then recording start.
4. Mode: Record
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
50 mV (–23.8 dB)
 
600
blank tape CN-123
set
5. Mode: Playback
recorded portion
set
CN301 (Pin 3 : L-CH)
level meter
+
Pin 1 : R-CH
recorded portion
set
level meter
+
CN301 (Pin 3 : L-CH)
Pin 1 : R-CH
6. Confirm playback the signal recorded in step 3 become adjustable level as follows. If these levels do not adjustable level, adjustment the RV301 (L-CH) and RV351 (R-CH) on the MAIN board to repeat steps 4 and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB) Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
6. Confirm playback the signal recorded in step 3 become adjustable level as follows. If these levels do not adjustable level, adjustment the RV304 (L-CH) and RV354 (R-CH) on the AUDIO board to repeat steps 4 and 5.
Adjustable level: Playback output of 315 Hz to playback output
Adjustment Location: MAIN board
REC Level Adjustment
Procedure:
INTRODUCTION When set to the test mode performed in Tape Speed Adjustment, when the tape is rewound after recording, the REC memory mode which rewinds only the recorded portion and playback is set. This REC memory mode is convenient for performing this adjustment. During recording, the input signal FUNCTION will automatically switch to VIDEO. (If do not operation of stopped from recording complete, and rotate of shuttle knob then rewind to recording start position.)
1. Press MD/VIDEO button to select VIDEO. (This step is not necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press REC PAUSE/START button, press REC PAUSE/ START button, then recording start.
of 10 kHz: ±1.0 dB
DECK B
[LEAF SW BOARD] (Component Side)
TAPE SPEED

(NORMAL) (HIGH)
RV1002
RV1001
CN1001
19
FM Tuned Level Adjustment
FM RF SSG
75 coaxial
Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 28 dB (at 75 W open)
set
FM ANTENNA terminal (TM601)
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 10M 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. Supply a 28 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Adjust RV611 to the point (moment) when the TUNED indicator will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
FM RF SSG
75 coaxial
set
Carrier frequency : 98 MHz Modulation : AUDIO 1 kHz, 75 kHz deviation (100%) Output level : 60 dB (at 75 W open)
FM ANTENNA terminal (TM601)
Procedure:
1. Supply a 60 dB 98 MHz signal from the ANTENNA terminal.
2. Tune the set to 98 MHz.
3. Measure voltage between pin 21 of IC 601. Adjust T601 ubtil the voltage becomes 0 V.
Oscilloscope
BD board
TP(FEO) TP(VC)
Procedure :
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn Power switch on.
5. Load a disc (YEDS-18) and actuate the focus search. (In consequence of open and close the disc tray, actuate the focus search)
6. Confirm that the oscilloscope waveform (S-curve) is symmetrical between A and B. And confirm peak to peak level within 4 ±1 Vp-p.
S-curve waveform
symmetry
A
within 4 ±1Vp-p
B
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD] Component side
NULL
T601
RV611
FM TUNED LEVEL
CN301
RV351
7. After check, remove the lead wire connected in step 2 and 3.
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
oscilloscope
BD board
TP(RF) TP(VC)
Procedure :
CN304
13
RV301
RV303
RV352
RV302
RV353
CN302
CN303
RV304
RV354
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turned Power switch on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal level is correct or not.
6. After check, remove the lead wire connected in step 2.
20
Note: Clear RF signal waveform means that the shape can be
r
clearly distinguished at the center of the waveform.
RF signal waveform
VOLT/DIV : 200mV TIME/DIV : 500ns
level : 1.45 ± 0.3Vp-p
E-F Balance (1 Track jump) Check
oscilloscope
BD board
TP (TEO) TP (VC)
+
Procedure:
1. Connect oscilloscope to TP (TEO) and TP (VC) board.
2. Turned Power switch on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the Y button. (Becomes the 1track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope waveform.
1 track jump waveform
Center of waveform
B
0V
level=1.3±0.6Vp-p
Specification level: x 100=less than ±22%
A B
Symmetry
A (DC voltage)
6. After check, remove the lead wire connected in step 1.
RF PLL Free-run Frequency
Procedure :
1. Connect frequency counter to test point (XPCK) with lead wire.
BD board
TP (XPCK)
frequency counte
+
2. Turned Power switch on.
3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.
21
r
Adjustment Location :
[ BD BOARD ] SIDE B
TP
(RF) TP (VC)
TP (AGCCON)
TP (AGND)
TP (IOP)
IC102
TP (FEO)
TP (TEO)
TP (DGND)
VIDEO SECTION
Frequency adjustment
1. Connect the frequency counter to check point of the VIDEO board.
2. Adjust CT503 of the VIDEO board so that the frequency counter read 27MHz ± 80Hz at STOP condition.
Adjustment Location :
[ VIDEO BOARD ] – SIDE A –
SL502
SL501
TEST MODE
SL503
CT503
VIDEO
FREQUENCY
IC505
(27MHz)
IC507
(GND)
frequency counte
VIDEO board (27 MHz)
[ VIDEO BOARD ] – SIDE B –
SL503
TEST
MODE
SL502 SL501
IC502
+
22
SECTION 7 DIAGRAMS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
• All resistors are in and 1/ specified.
f
C : panel designation.
Note:
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
U : B+ Line.
V : B– Line.
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• Voltages are taken with a VOM (Input impedance 10 M).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Abbreviation
: internal component.
under no-signal (detuned) conditions.
Voltage variations may be noted due to normal produc­tion tolerances.
Voltage variations may be noted due to normal produc­tion tolerances.
F : FM f : AM E : PB (DECK A) d : PB (DECK B) G : REC (DECK B) J : CD c : digital out
EA : Saudi Arabia model MY : Malaysia model SP : Singapore model
4
W or less unless otherwise
Note on Printed Wiring Boards:
X : parts extracted from the component side.
b : Pattern from the side which enables seeing.
• Indication of transistor.
C
These are omitted.
Q
B
CE
These are omitted.
Q
B
HCD-VX99
7-1. CIRCUIT BOARD LOCATION
MOTOR Board
SENSOR Board
TRANS Board
E
CD SWITCH Board
PANEL Board
LEAF SW Board
HEAD (A) Board
HEAD (B) Board
DRIVER Board
VIDEO Board
BD Board
MAIN Board
POWER AMP Board
2323
HCD-VX99
Waveforms – BD SECTION – – VIDEO SECTION –
1
1
IC101 t;
RFAC
IC502 qd
XOUT
7
IC509 ql
LRCK
– MAIN BOARD –
1
IC401 qa
STOP MODE
3
T301 4
TAPE B REC MODE
PANEL BOARD –
1
IC601 oa
STOP MODE
2
IC101 ra
TE
APPROX 500mVp-p
3
IC101 el
FE
APPROX 200mVp-p
4
IC101 wg
MDP
7.5µsec
1.3Vp-p
2.6Vp-p
2.5V
2.5V
2
IC505 ug
COUT
3
IC505 yl
YOUT
4
IC304 9
COUT
10MHz
H
H
4Vp-p
44.1kHz
8
IC509 qj
BCK
1Vp-p
2.11MHz
9
IC504 8
384FS
2Vp-p
H
q;
27M
1Vp-p
33.8MHz
IC504 6
27MHz
4.6Vp-p
4.8Vp-p
4.8Vp-p
3.8Vp-p
32.768kHz
2
IC401 qd
STOP MODE
16MHz
3.0Vp-p
3.4Vp-p
80.7kHz
120Vp-p
12.5MHz
4.8Vp-p
5
IC304 qg
YOUT
6
IC509 1
XT1
2Vp-p
H
5.8Vp-p
27MHz
24
24
HCD-VX99
7-2. BLOCK DIAGRAMS
– TUNER/CD SECTION –
FM 75
AM
G
TM601
8
ANT IN
1
3
RB641
FE602
IF OUT
F OUT
13
AM/FM IF MPX
1
FM IF
9
IF OUT
AM/IF
AM OSC
VCO STOP
8
IF REQ MUTE
AM RF IN
AM OSC
V REG
IC601
L OUT
R OUT
AM MIX OUT
FM SD ADJ
TUNED
STEREO
R-CH
RV611
BUFFER
Q611
IFT601
11
10
18AM IF IN
19
3
6
17
Q602
Q602
RF IF AMP
10
1
24
15
18
17
19
FM
XIN
XOUT
FM OSC
VT1 IN
VT1
PD1
PLL
IC651
FM/AM IF
AM OSC
12
FM
7
14
2VCO STOP
8IF REQ
DO
6DO
DI
DI
4DI
CL
CE
CL
5
CE
3
12
24
13
20
22
23
1
3
VT
4
14
4
55
122
1511
67
9
CF601 CF602
+B A+12V
X651
4.5MHz
LPF601
LPF
L-CH
DO
DI
CL
CE
A
MAIN
SECTION
(Page 27)
MASTER CONTROL
24
TUNED
23
STEREO
22
ST MUTE
27
ST DIN
26
ST DOUT
28
ST CLK
25
ST CE
RCH is omitted
Signal Path
: FM
: CD
: DIGITAL OUT
: VIDEO
IC401(1/2)
OPTICAL PICK-UP
BLOCK
(KSS-213F)
VC
A
B
C
D
E
F
LD
GND
PD
VR
F+
FOCUS
09
COIL
TRACKING
COIL
F-
T+
T-
+5V
Q101
DRIVE
M102 SLED
MOTOR
M101
SPINDLE
MOTOR
DIGITAL SERVO
S101
RF AMP
IC103
12
VC
5
6
7
8
11
10
LD
3
4
MOTOR/COIL DRIVE
14
VO1 (+)
13
VO1 (–)
12
VO2 (+)
11
VO2 (–)
16
VO4 (–)
A
B
C
D
E
F
LD
PD
IC102
OPIN1 (+)
OPIN1 (–)
OPIN2 (+)
OPIN2 (–)
OPIN4 (–)
RFO
RFI
16
17
FE
14
TE
13
22LD ON
21HOLD SW
2
3
5
6
26
A+5V
LIMIT
SWITCH
M
15
18
VO4 (+)
VO3 (–)
OPIN4 (+)
OPIN3 (–)
27
23
DIGITAL SIGNAL PROC.
D/A CONV.
IC101
26
SSTP
50
RFAC
43
RFDC
39
FE
41
TE
40
SE
33
FFDR
34
FRDR
31
TFDR
32
TRDR
30
SRDR
29
SFDR
25
MDP
D OUT
PCMD
B CLK
L RCK
C2PO
DATA
XLAT
CLOK
SENS
S CLK
MUTE
XTSL
SCOR
SQSO
SQCK
XRST
XTAI
IC201
OPTICAL
A DATA
B CLK
L RCK
C2PO
DATA
XLT
CLK
SENS
S CLK
MUTE
CTRL1
SCOR
SUBQ
SQCK
XRST
MCK
DIGITAL
OUT
64
66
67
65
14
4
5
6
7
8
3
69
15
76
77
2
71
DIGITAL OUT
B
VIDEO
SECTION
(Page 26)
CD
IC701
9
MOTOR
DRIVE
7
TBL ADDRESS
4
2
IC711
SENSOR
OPEN/CLOSE
S701
S711
BU UP/
DOWN
M721
M
TURN
MOTOR
C
VIDEO
SECTION
2
I
C, DATA
2
C, CLK
I
XRST
BU UP/DOWN SW
30
IIC-DATA
29
IIC-CLK
43
XRST
MTR CNT2
T SENS
44
45MTR CNT1
49
46OPEN SW
47CLOSE SW
48
(Page 26)
M
17
VO3 (+)
STBY1
STBY2
9
20
LD ON
LPH
2525
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