SONY HCD-ZX6, HCD-ZX8 Service Manual
HCD-ZX6/ZX8
SERVICE MANUAL
Ver 1.0 2004. 07
• HCD-ZX6/ZX8 are the tuner,
deck, CD and amplifier
section in FST-ZX6/ZX8.
(Photo: HCD-ZX8)
CD CD Mechanism Type CDM79B-F1BD81
Section Base Unit Name BU-F1BD81A
TAPE Model Name Using Similar Machanism HCD-GN880
Section Tape Mechanism Type CWM43RR35
E Model
Model Name Using Similar Mechanism NEW
Optical Pick-up Name KSM-215DCP/C2RP
Amplifier section
HCD-ZX8
Mexican models:
The following measured at AC 127 V, 60 Hz
DIN power output (rated):
140 × 2 + 140 × 2 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
180 × 2 + 180 × 2 watts
(6 ohms at 1 kHz, 10% THD)
Other models:
The following measured at AC 120, 220, 240 V, 50/60 Hz
DIN power output (rated):
140 × 2 + 140 × 2 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
180 × 2 + 180 × 2 watts
(6 ohms at 1 kHz, 10% THD)
HCD-ZX6
Mexican models:
The following measured at AC 127 V, 60 Hz
DIN power output (rated):
220 + 220 watts
(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
280 + 280 watts
(4 ohms at 1 kHz, 10% THD)
SPECIFICATIONS
Other models:
The following measured at AC 120, 220, 240 V, 50/60 Hz
DIN power output (rated):
220 + 220 watts
(4 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
280 + 280 watts
(4 ohms at 1 kHz, 10% THD)
Inputs
PHONO IN (phono jack):
sensitivity 3 mV,
impedance 47 kOhms
MIC (phone jack): sensitivity 1 mV,
impedance 10 kOhms
GAME INPUT AUDIO L/R (phono jacks):
sensitivity 250 mV,
impedance 47 kOhms
GAME INPUT VIDEO (phono jack):
1 Vp-p, 75ohms
VIDEO/MD IN L/R (phono jacks):
sensitivity 250 mV/450 mV,
impedance 47 kOhms
– Continued on next page –
9-879-083-01
2004G04-1
© 2004. 07
COMPONENT Hi-Fi STEREO SYSTEM
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
1
HCD-ZX6/ZX8
Outputs
PHONES (stereo phone jack):
accepts headphones of
8 ohms or more
VIDEO/MD OUT L/R (phono jacks):
voltage 250 mV,
impedance 1 kOhm
VIDEO OUT (phono jack):
max. output level 1 Vp-p,
load impedance 75 ohms
FRONT SPEAKER:
HCD-ZX8:
FRONT L/R Use only the supplied
speaker SS-ZX8
SURROUND L/R Use only the supplied
speaker SS-ZX8
HCD-ZX6:
FRONT L/R Use only the supplied
speaker SS-ZX6
CD/MP3 player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ=780 nm)
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)
Wave length 780 – 790 nm
Signal-to-noise-ratio More than 90 dB
Dynamic range More than 90 dB
OPTICAL CD DIGITAL OUT
(Square optical connector jack, rear panel)
Wave length 660 nm
Output level –18 dBm
General
Power requirements
Mexican models: 127 V, 60 Hz
Other models: 120 V, 220 V or
230 – 240 V AC, 50/60 Hz
Adjustable with voltage
selector
Power consumption
HCD-ZX8: 330 watts
HCD-ZX6: 240 watts
Dimensions (w/h/d) (Main Unit)
Approx. 362 × 437 × 465 mm
Mass (Main Unit)
HCD-ZX8: Approx. 19.0 kg
HCD-ZX6: Approx. 18.0 kg
Supplied accessories: AM loop antenna (1)
FM lead antenna (1)
Remote Commander (1)
Batteries (2)
Speaker cords:
• HCD-ZX6 only 2m (2)
• HCD-ZX8 only –grey (10m) (2)
–white (3m) (2)
Speaker pads:
• HCD-ZX6 only (8)
• HCD-ZX8 only (16)
Design and specifications are subject to change without
notice.
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I tapes
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz
(50 kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
AM tuner section
Tuning range
Latin American models: 530 – 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 – 1,710 kHz
(with the tuning interval
set at 9 kHz)
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
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 P ARTS WHOSE
PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR
IN SUPPLEMENTS PUBLISHED BY SONY.
2
HCD-ZX6/ZX8
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.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher than
ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to about
350 °C.
Caution: The printed pattern (copper foil) may peel away if the
heated tip is applied for too long, so be careful!
• Strong viscosity
Unleaded solder is more viscou-s (sticky , less prone to flo w) than
ordinary solder so use caution not to let solder bridges occur such
as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may also
be added to ordinary solder.
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
claassified as a CLASS 1
LASER product. This
label 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 HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
breakdown 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.
3
HCD-ZX6/ZX8
MODEL IDENTIFICATION
– BACK PANEL –
Part No.
MODEL PARTS No.
ZX6: E2 4-252-689-0s
ZX8: E51 4-252-689-1s
ZX6: E51 4-252-689-2s
ZX8: E2 4-252-689-3s
PLAYABLE DISC
You can playback the following discs on this system. The other
discs cannot be played back.
List of playable discs
Format of
discs
Audio CDs Audio
CD-R/CD-RW Audio
(Audio CDs)
CD-R/CD-RW Audio
(Discs with
MP3 audio
tracks)
Disc logo Contents
• Abbreviation
E2 : 120 V AC area in E model
E51 : 220 V AC area in E model
4
TABLE OF CONTENTS
HCD-ZX6/ZX8
1. SERVICE NOTE
1-1. Service Position of CD BU Block....................................... 6
1-2. Service Position of TC Mechanism, Panel Board ............... 7
1-3. Service Position of Power Board ........................................ 8
1-4. Service Position of CD Changer ......................................... 8
2. GENERAL
List of Button Locations and Reference Pages........................ 9
3. DISASSEMBLY
3-1. Case ................................................................................... 13
3-2. Loading Panel.................................................................... 13
3-3. Front Panel Section ...........................................................14
3-4. Tape Mechanism ............................................................... 14
3-5. Game-in/hp Board, Mic Board.......................................... 15
3-6. Back Panel Section............................................................ 15
3-7. CD Mechanism Section..................................................... 16
3-8. Main Board ....................................................................... 17
3-9. Table Assy ......................................................................... 17
3-10. SE-130 Board .................................................................... 18
3-11. TD Belt .............................................................................. 18
3-12. DC Motor (M901) ............................................................. 19
3-13. Optical Pick-up ................................................................. 19
3-14. BD81A Board ................................................................... 20
4. TEST MODE .....................................................................21
5. MECHANICAL ADJUSTMENTS............................... 25
6. ELECTRICAL ADJUSTMENTS................................. 25
7. DIAGRAMS
7-1. Circuit Boards Location .................................................... 29
7-2. Note for Printed Wiring Boards
and Schematic Diagrams .................................................. 29
7-3. Waveforms......................................................................... 29
7-4. Printed Wiring Board –BD Section– ................................. 30
7-5. Schematic Diagram –BD Section–.................................... 31
7-6. Printed Wiring Boards –Loading Section– ....................... 32
7-7. Schematic Diagram –Loading Section–............................33
7-8. Schematic Diagram –Main Section (1/4)– ........................ 34
7-9. Schematic Diagram –Main Section (2/4)– ........................ 35
7-10. Schematic Diagram –Main Section (3/4)– ........................ 36
7-11. Schematic Diagram –Main Section (4/4)– ........................ 37
7-12. Printed Wiring Board –Main Section– .............................. 38
7-13. Printed Wiring Boards –Power Section–........................... 39
7-14. Schematic Diagram –Power Section (1/2)– ...................... 40
7-15. Schematic Diagram –Power Section (2/2)– ...................... 41
7-16. Printed Wiring Board –Panel Section–.............................. 42
7-17. Schematic Diagram –Panel Section– ................................43
7-18. Printed Wiring Boards –Volume Section– ........................ 44
7-19. Printed Wiring Board –Mic Section– ................................ 45
7-20. Schematic Diagram –Volume, Mic Section– ....................46
7-21. Schematic Diagram –Switch Section– .............................. 47
7-22. Printed Wiring Boards –Switch Section (1/2)–................. 48
7-23. Printed Wiring Boards –Switch Section (2/2)–................. 49
7-24. Printed Wiring Boards –Jack Section–..............................50
7-25. Schematic Diagram –Jack Section– .................................. 51
7-26. Printed Wiring Board –Surround Section– ....................... 52
7-27. Schematic Diagram –Surround Section– ..........................53
7-28. Printed Wiring Boards –Transformer Section– ................. 54
7-29. Schematic Diagram –Transformer Section– ..................... 55
7-30. IC Block Diagrams............................................................ 56
7-31. IC Pin Descriptions ...........................................................57
8. EXPLODED VIEWS
8-1. Back Panel Section............................................................ 65
8-2. Front Panel Section (1)...................................................... 66
8-3. Front Panel Section (2)...................................................... 67
8-4. Chassis Section ................................................................. 68
8-5. CD Mechanism Section (1) ............................................... 69
8-6. CD Mechanism Section (2) ............................................... 70
9. ELECTRICAL PARTS LIST ........................................71
5
HCD-ZX6/ZX8
1-1. SERVICE POSITION OF CD BU BLOCK
SECTION 1
SERVICE NOTE
chassis
CD block
6
1-2. SERVICE POSITION OF TC MECHANISM, PANEL BOARD
k
gear (shaft)
3
loading panel
HCD-ZX6/ZX8
2
1
Turn the gear (shaft) in the
direction of the arrow.
PANEL board
tape mechanism bloc
7
HCD-ZX6/ZX8
k
1-3. SERVICE POSITION OF POWER BOARD
front panel assy CD mechanism bloc
POWER board
1-4. SERVICE POSITION OF CD CHANGER
CD mechanism block
8
SECTION 2
GENERAL
HCD-ZX6/ZX8
This section is extracted
from instruction manual.
9
HCD-ZX6/ZX8
10
HCD-ZX6/ZX8
11
HCD-ZX6/ZX8
Note : Disassemble the unit in the order as shown below.
SET
SECTION 3
DISASSEMBLY
3-1. CASE
(Page 13)
3-2. LOADING PANEL
(Page 13)
3-3. FRONT PANEL SECTION
(Page 14)
3-6. BACK PANEL SECTION
(Page 15)
3-7. CD MECHANISM SECTION
(Page 16)
3-9. TABLE ASSY
(Page 17)
3-13. OPTICAL PICK-UP
(Page 19)
3-14. BD81A BOARD
(Page 20)
3-4. TAPE MECHANISM
(Page 14)
3-8. MAIN BOARD
(Page 17)
3-5. GAME-IN/HP BOARD,
MIC BOARD
(Page 15)
3-10. SE-130 BOARD
(Page 18)
3-11. TD BELT
(Page 18)
3-12. DC MOTOR (M901)
(Page 19)
12
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE
HCD-ZX6/ZX8
3
7
case
6
three
(case 3 TP2)
case (top)
screws
three claws
2
1
three claws
4
four
(+
5
three
(case 3 TP2)
three
screws
BVTP3 x 8
(+
screws
BVTP3 x 8
screws
)
)
3-2. LOADING PANEL
3
gear (shaft)
loading panel
2
1
Turn the gear (shaft) in the
direction of the arrow.
13
HCD-ZX6/ZX8
3-3. FRONT PANEL SECTION
4
CN920 (3P)
qf
front panel section
5
connector (3P)
2
3
CN507 (21P)
CN104 (13P)
0
screw
(+
lug
BVTP3 x 8
)
MAIN board
two hooks
qa
three
screws
(+
BVTP3 x 8
3-4. TAPE MECHANISM
qs
)
two
(+
screws
BVTP3 x 8
dust sheet
1
two holes
9
CN801 (4P)
8
CN803 (3P)
7
CN802 (2P)
6
connector (6P)
qd
three
screws
BVTP3 x 8
)
(+
4
)
tape mechanism
3
three
(+
BVTP2.6 x 8
screws
2
)
two
screws
(+
BVTP2.6 x 8
)
14
lid (TC)
lug
1
3-5. GAME-IN/HP BOARD, MIC BOARD
)
)
0
qa
two clips
knob (MIC)
9
bracket (MIC)
8
qd
4
bracket (game)
four
screws
(+
BVTP2.6 x 8
MIC board
qs
screw
(+
BVTP2.6 x 8
HCD-ZX6/ZX8
)
6
two
screws
(+
BVTP2.6 x 8
7
GAME-IN/HP board
)
3
5
clip
)
four
screws
(+
BVTP2.6 x 8
)
3-6. BACK PANEL SECTION
5
3
CN1004 (4P)
4
CN1000 (3P)
two
screws
(+
BVTP3 x 8
1
two
screws
(+
BVTP2.6 x 8
6
two
(+
two lugs
screws
BVTP3 x 8
7
two
(+
BVTP3 x 8
8
two
screws
(+
BVTP3 x 8
9
three
(+
four
qa
(+
0
two
(+
BVTP3 x 8
qs
three
(+
BVTP3 x 8
)
screws
screws
BVTP3 x 8
screws
BVTP3 x 8
screws
screws
)
)
)
)
)
2
bracket (center)
2
CN1002 (2P)
1
CN504 (11P)
)
qd
qf
CN513 (3P)
qg
back panel section
15
HCD-ZX6/ZX8
n
3-7. CD MECHANISM SECTION
5
three
screws
(+
BVTP3 x 8
1
CN509 (11P)
6
)
2
CN501 (27P)
6
4
two
(+
7
BVTP3 x 8
chassis section
screws
)
8
two
(+
screws
BVTP3 x 8
3
two
screws
(+
BVTP3 x 8
9
two
screws
(+
BVTP3 x 8
)
)
)
0
CD mechanism sectio
16
3-8. MAIN BOARD
)
d
1
CN502 (4P)
CN602
5
6
CN601
4
two
(+
HCD-ZX6/ZX8
MAIN boar
screws
BVTP3 x 8
)
3-9. TABLE ASSY
qs
table assy
3
CN509 (11P)
1
floating screw
(+PTPWH M2.6)
7
2
screw
BTP2.6 x 8
(+
2
tray
)
CN501 (27P)
6
CN002 (6P
3
two
(+
screws
BTP2.6 x 8
4
bracket
8
claw
screw
BTP2.6 x 8
(+
)
5
)
0
plate (guide)
qa
9
17
HCD-ZX6/ZX8
w
3-10. SE-130 BOARD
1
CN102 (2P)
6
SE-130 board
4
two
(+
screws
BTP2.6 x 8
5
)
CN101 (6P)
3
cla
3-11. TD BELT
2
two
(+
P3 x 3
5
4
screws
)
TD unit assy
TD belt
1
two
(+
screws
BTP2.6 x 8
2
claw
)
3
TD motor assy
18
table assy
3-12. DC MOTOR (M901)
5
CN004 (2P)
6
DC motor (M901)
HCD-ZX6/ZX8
3-13. OPTICAL PICK-UP
4
two
P2.6 x 4
(+
screws
3
belt (loading)
2
gear (loading A)
1
)
screw
PTPWH M2.6
(+
)
holder (BU) assy
7
two coil spring (insulating)
6
two
stopper (BU)
5
two
BVTP2.6 x 8
(+
screws
8
)
0
9
4
CN201 (27P)
2
chassis plate
1
two
BVTP3 x 8
(+
optical pick-up
two coil spring (insulating)
3
two floating
(+
PTPWHM2.6)
screws
screws
)
19
HCD-ZX6/ZX8
)
3-14. BD81A BOARD
5
BD81A board
1
CN101 (16P
3
gap tube
4
Remove soldering from the four points.
2
screw
BVTP2.6 x 8
(+
)
20
SECTION 4
TEST MODE
HCD-ZX6/ZX8
[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube, LED,
model, destination, software version, volume, ke y , jog and VACS
level.
Procedure:
1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC
2] button simultaneously.
2. All LEDs and segments in fluorescent indicator tube are lighted
up.
3. When you want to enter the software version display mode,
press [DISC 1] button. The model and destination are displayed.
4. Each time [DISC 1] button is pressed, the display changes from
MC version, GC version, CD version, CDDM version, CDMA
version, CDMB version, BDA version, BDB version, ST version,
TC version, T A v ersion, TM version in this order , and returns to
the MC version display.
5. When [DISC 3] button is pressed while the version numbers are
being displayed except model and destination, the date of the
software creation appear. When [DISC 3] button is pressed again,
the display returns to the software version display . When [DISC
1] button is pressed while the date of the software creation is
being displayed, the date of the software creation is displayed
in the same order of software version display.
6. Press [DISC 2] button, the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
“K0 J0 V0”. Each time a button is pressed , “K” value increases.
However, once a button has been pressed, it is no longer taken
into account.
“J” value increases in the manner of 0, 1, 2, 3 ... if [JOG] is
turned clockwise, or it decreases in the manner of 0, 9, 8, 7 ... if
[JOG] knob is turned counter-clockwise. (only for HCD-ZX8)
“V” value increases in the manner of 0, 1, 2, 3 ... if [VOLUME]
knob is turned clockwise, or it decreases in the manner of 0, 9,
8, 7 ... if [VOLUME] knob is turned counter-clockwise.
8. When [DISC 3] button is pressed after all LEDs and se gments in
fluorescent indicator tube light up, the fluorescent indicator tube
displays “VACS A APBB”. A is VACS lev el which is trigger by
signal level while BB is VACS level which is trigger by APVACS
(Abuse Protection VACS).
9. When [EX-CHANGE] button is pressed after all LEDs and
segments in fluorescent indicator tube light up, alternate
segments in fluorescent indicator tube would light up. If you
press [EX-CHANGE] button again, another half of altemate
segments in fluorescent indicator tube would light up. Pressing
[EX-CHANGE] button ag ain would cause all segments lights up.
10. To release from this mode, press three buttons in the same
manner as step 1, or disconnect the power cord.
[MC TEST MODE]
•This mode is used to check operations of the respective sections
of Amplifier, Tuner , and Tape.
3. When b button or B button is pressed, GEQ is set to flat and
a message “GEQ FLAT” appears on the fluorescent indicator
tube.
4. When the [VOLUME] knob is turned clockwise even slightly,
the sound volume increases to its maximum and a message
“VOLUME MAX” appears on the fluorescent indicator tube.
5. When the [VOLUME] knob is turned counter-clockwise even
slightly, the sound volume decreases to its minimum and a
message “VOLUME MIN” appears on the fluorescent indicator
tube.
•Tape function
1. When a tape is inserted in Deck B and recording is started, the
function is changed to VIDEO automatically . When [CD SYNC]
button is pressed during recording in function, ALC (Automatic
Logic Control) is turned on.
2. During recording, press . m (TAPE B) button will stop
the recording and the function is changed to T APE B and re wind
the tape in Deck B until the recording start position and playback
of the tape B is started. If the [REC PAUSE/START] button is
pressed for a pause and pressed again to resume recording during
recording time, when the tape is rewind, the tape will be rewind
until the position where the pause is applied.
• AMS Test Mode
1. Select the function “TAPE A” or “TAPE B”.
2. Select Loop or Relay direction mode by pressing the
[DIRECTION] button. Insert a test tape AMS-110A or AMS-120
to selected tape deck.
3. Press the [AMP MENU] button to enter the AMS test mode.
4. After the test tape is rewind to the beginning of the tape, the
AMS+ is checked, and the mechanism is shut off after detecting
the AMS signal twice.
5. Then the AMS– is checked and the mechanism is shut of f after
detecting the AMS signal twice.
6. When the check is complete, a message of either OK or NG
appears on the fluorescent indicator tube.
•To release from MC Test mode
1. To release from this mode, press ?/1 button.
2. The cold reset is enforced at the same time.
[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 x (TAPE B) button, [TUNER ENTER] button, and ?/1
button simultaneously.
2. The fluorescent indicator tube becomes blank for a while, and
the set is reset.
Procedure:
•To enter MC Test Mode
1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC
3] button simultaneously.
2. The 4 speaker symbols and CD ring indicators flash on the
fluorescent indicator tube. The function is changed to VIDEO.
• Check of Amplifier
1. When v button is pressed, GEQ increases to its maximum and
a message “GEQ MAX” appears on the fluorescent indicator
tube.
2. When V button is pressed, GEQ decreases to its minimum and
a message “GEQ MIN” appears on the fluorescent indicator
tube.
[VACS ON/OFF]
•This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press [PLAY MODE] button and ?/1 button simultaneously.
The message “VACS OFF” or “VACS ON” appears on the
fluorescent indicator tube.
21
HCD-ZX6/ZX8
START
(from Disc 1)
TOC Reading
Play first track for 2
seconds
Play last track for 2
seconds
EX-CHANGE open/
close
Open the disc tray
Disc skip
Close the disc tray
Change the next disc
Disc Chucking
[TUNER STEP CHANGE]
•The step interval of AM channels can be toggled between 9 kHz
and 10 kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press [TUNER BAND] button to select the “AM”.
3. Press ?/1 button to turn the set OFF.
4. Press [TUNER ENTER] button and ?/1 button simultaneously.
The system will turn ON automatically. The message “AM 9k
STEP” or “AM 10k STEP” appears on the fluorescent indicator
tube and thus the channel step is changed.
[CD SERVICE MODE]
•This mode let you move the CD sled motor freely . Use this mode
when you want to clean the optical pick-up.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Press x (T APE B) button, [TUNER ENTER] button, and [DISC
5] button simultaneously.
4. The CD service mode is activated. The message “SERVICE
MODE” appears on the fluorescent indicator tube.
5. With the CD in stop status, press M (CD) b utton to move the
optical pick-up to outside track, or press m (CD) button to
move to inside track. The message “SLED OUT” or “SLED
IN” appears on the fluorescent indicator tube.
6. To turn on or off the laser, press [PLAY MODE] button. The
message “LASER ON” or “LASER OFF” appears on the
fluorescent indicator tube.
7. To release from this mode, press ?/1 button.
Aging mode sequence:
[AGING MODE]
• This mode can be used for operation check of CD section.
If an error occurs, the aging operation would stops and the
status is displayed.
If there were no error occurs, the aging operation would
continue repeatedly.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Load five discs on the disc tray.
4. Press [PLAY MODE] button to select the “ALL DISCS” mode,
and press the [REPEAT] button to select “REPEA T OFF” mode.
5. Press x (T APE B) button, [TUNER ENTER] button, and [DISC
4] button simultaneously.
6. Aging operation is started.
7. T o release from this mode, press ?/1 button or disconnect the
power cord to turn the power OFF.
22
HCD-ZX6/ZX8
• Display when an error occurred (CD Error Code Mode)
Procedure:
1. Press x (TAPE B) button, [TUNER ENTER] button and [DISC
SKIP] button simultaneously to enter the error code display
mode.
2. The fluorescent indicator tube displays the number of total error.
3. Each time M (CD) button or m (CD) button is pressed,
display change as below.
Display of
Total Error
FF button
AMS (+)
button
FF button
AMS (+)
button
FR button
Display of
Mechanical
Error
FR button
Display of
No Disc
Error
AMS (–)
button
AMS (_)
button
• Display of no disc errors
D*$$%%&&##00
D*: The number of no disc error (“00” is latest one)
(Press > (CD) button or . (CD) button to display next
error)
$$: Error type
01: Focus error
02: GFS error
03: Setup error
%%: Not used
&&:
00: No disc judgment without chucking retry.
01: No disc judgment after chucking retry.
##: The state when judged as no disc
01: Stop
02: Setup
03: TOC reading
04: Access
05: Playback
06: Pause
07: Manual search (Play)
08: Manual search (Pause)
[CD REPEAT 5 LIMIT OFF MODE]
• The number of repeat for CD playback is 5 times when the
repeat mode is “REPEAT ALL”. This mode enables CD to
repeat playback for limitless times.
4. To clear the error record, operate the cold reset. (Refer to the
“MC COLD RESET”)
5. T o release from this mode, press the ?/1 button or disconnect
the power plug to turn the power OFF.
• Display of total error
Em **Ed**
Em**: The number of mechanical errors.
Ed**: The number of no disc errors after chucking the disc.
• Display of mechanical errors
M*$$%%&&##00
M*: The number of mechanical error (“00” is latest one)
(Press > (CD) button or . (CD) button to display next
error)
$$: Not used
%%: Loading related error (Second figure is not used)
D: Stop by the problem other than mechanical problem
while closing.
E: Stop by the problem other than mechanical problem
while opening.
C: Stop by the problem other than mechanical problem
while chucking up.
F: Stop by the problem other than mechanical problem
while chucking down.
&&: Emerging error
01: Stop while chucking up.
02: Stop while chucking up.
03: Time-out of EX-CHANGE open.
05: Time-out of EX-CHANGE close.
##: Not used
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Press x (TAPE B) button, [TUNER ENTER] button and
[REPEAT] button simultaneously to enter the CD repeat 5 limit
off mode and the fluorescent indicator tube displays “LIMIT
OFF”.
•To release from this mode, operate the cold reset. (Refer to the
“MC COLD RESET”)
[CD SHIP MODE (WITH MEMORY CLEAR)]
•This mode moves the optical pick-up to the position durable to
vibration and clears all data including preset data stored in the
RAM to initial conditions. Use this mode when returning the
set to the customer after repair.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Press [EXCHANGE] button and ?/1 button simultaneously.
The set will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and the
CD ship mode is set.
23
HCD-ZX6/ZX8
[CD SHIP MODE (WITHOUT MEMORY CLEAR)]
•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 ?/1 button to turn the set ON.
2. Select CD function.
3. Press [REPEAT] button and ?/1 button simultaneously. The
set will power off automatically.
4. After the “STANDBY” blinking display finish, a message
“LOCK” is displayed on the fluorescent indicator tube and the
CD ship mode is set.
[CD POWER MANAGE]
•This mode let you switch on or off power supply to the BU
during TUNER function.
•When CD POWER is set to OFF, the power supply to the BU is
cut off during TUNER function. It will increase the time taken
to access CD when function change from TUNER to CD but it
will improve tuner reception.
•When CD POWER is set to ON, the power supply to the BU is
not cut off during TUNER function. It will reduce the time taken
to access CD when function change from TUNER to CD but it
will decrease tuner reception performance.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Press ?/1 button to turn the set OFF.
4. Press x (CD) button and ?/1 button simultaneously . The set
will power on automatically.
5. The message “CD POWER ON” or “CD POWER OFF” will
be displayed on the fluorescent indicator tube.
[CD TRAY LOCK MODE]
•This mode let you lock the disc tray. When this mode is activated, the disc tray will not open when [OPEN/CLOSE] button
or [EX-CHANGE] button is pressed. The message “LOCKED”
will be displayed in on the fluorescent indicator tube.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select CD function.
3. Press x (CD) b utton and [OPEN/CLOSE] button simultaneously
and hold down until “LOCKED” or “UNLOCKED” displayed
on the fluorescent indicator tube (around 5 seconds).
[VIDEO/MD SWITCHING]
•This mode let you switch from VIDEO to MD and vice-versa.
Procedure:
1. During Power Off, press [FUNCTION] button and ?/1 button
simultaneously. The set power on automatically and the function
will changed to MD. Do the same procedures again to change
from MD to VIDEO.
24
SECTION 5
MECHANICAL ADJUSTMENTS
HCD-ZX6/ZX8
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 Torque Meter Meter Reading
2.9 – 6.9 mN • m
FWD (30 to 70 g • cm)
CQ-102C (0.42 – 0.97 oz • inch)
FWD
back tension
FF/REW CQ-201B (80 to 170 g • cm)
0.19 – 0.59 mN • m
(2 to 6 g • cm)
(0.03 – 0.08 oz • inch)
7.8 – 16.7 mN • m
(1.11 – 2.36 oz • inch)
DECK SECTION
Precaution
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.
8. Set to the test mode.
(1) Press the ?/1 button to turn the power ON.
(2) Select the function “TAPE A or B”.
(3) Press the button of x (TC-B) , [TUNER ENTER], and [DISC
3] simultaneously, to set the tape deck test mode and displays
“TEST MODE” on the fluorescent indicator tube.
(4) To release from the test mode, press the ?/1 button.
•Test Tape
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0 dB Tape Speed Adjustment
0 dB=0.775 V
25
HCD-ZX6/ZX8
)
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback (FWD)
test tape
P-4-A100
(10 kHz, – 10 dB)
2. Turn the adjustment scre w 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 1dB of peak.
L-CH
peak
Output
level
MAIN board
VIDEO/MD OUT jack (J701)
L-CH, R-CH
level meter
set
within
1dB
+
within
1dB
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
R-CH
Screw
position
peak
L-CH
peak
R-CH
peak
Screw
position
3. Mode: Playback
test tape
P-4-A100
(10 kHz, – 10 dB)
L-CH
set
R-CH
in phase 45°90°135°180
4. Repeat step 1 to 3 in playback (REV) mode.
MAIN board
VIDEO/MD
L-CH
R-CH
waveform of oscilloscope
good
OUT jack (J701
oscilloscope
wrong
H
V
°
4. After the adjustments, apply suitable locking compound to the
pats adjusted.
26
HCD-ZX6/ZX8
p
p
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 (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
Oscilloscope
BD81A board
TP0102(FE1)
TP117(VC)
Procedure:
1. Connect oscilloscope to TP102 (FE1) and TP117 (VC).
2. Press the ?/1 button to turn the power ON.
3. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak lev el
within 3 ±0.5 Vp-p.
S-curve waveform
symmetry
Note: Clear RF signal waveform means that the shape “◊” can be
clearly distinguished at the center of the waveform.
VOLT/DIV : 200mV
TIME/DIV : 500ns
±
level : 1.3
0.3Vp-
Checking Location:
TP117
(VC)
TP0102
(FE1)
IC101
A
±
within 3
B
0.5Vp-
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
BD81A board
TP124(RFACO)
TP117(VC)
Procedure:
1. Connect oscilloscope to TP124 (RFACO) and TP117 (VC).
2. Press the ?/1 button to turn the power ON.
3. Load a disc (YEDS-18) and playback.
4. Confirm that oscilloscope waveform is clear and check RFAC
signal level is correct or not.
TP124
(RFACO)
27
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