Sony HCD GN600 Service Manual

HCD-GN600
SERVICE MANUAL
Ver 1.0 2003.04
HCD-GN600 is the amplifier, CD play er, tape deck and tuner section in MHC­GN600.
Model Name Using Similar Mechanism NEW
CD Section
TAPE Section Tape Transport Mechanism Type CWM43RR23
CD Mechanism Type CDM74-K6BD47S Base Unit Name BU-K6BD47S Optical Pick-up Name KSM-213DCP Model Name Using Similar Mechanism HCD-XGR88
E Model
SPECIFICATIONS
Amplifier section
The following are measured at AC 127V, 60 Hz (Mexican model only) The following are measured at AC 120, 220, 240V50/60 Hz (except Mexican model) DIN power output (rated) 130 + 130 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
165 + 165 watts
(6 ohms at 1 kHz, 10% THD) Inputs GAME (VIDEO): 1 Vp-p, 75 ohms (phono jack) GAME (AUDIO): Voltage 250 mV, (phono jacks) impedance 47 kilohms MD/VIDEO (AUDIO) IN: voltage 450 mV/250 mV, (phono jacks) impedance 47 kilohms MIC: sensitivity 1 mV, (phone jack) impedance 10 kilohms
Outputs VIDEO OUT: max. output level 1 Vp-p, (phono jacks) unbalanced, Sync.
negative load impedance 75 ohms PHONES: accepts headphones of (stereo mini jack) 8 ohms or more FRONT SPEAKER: accepts impedance of 6 to
16 ohms
CD player section
System Compact disc and digital audio system Laser Semiconductor laser
(λ=795nm)
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 795 nm CD OPTICAL DIGIT AL OUT (Square optical connector jack, rear panel) Wave length 660 nm Output Level –18 dBm
Tape player section
Recording system 4-track 2-channel stereo Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I cassette
– Continued on next page –
9-877-282-01 Sony Corporation
2003D0200-1 Home Audio Company C 2003.04 Published by Sony Engineering Corporation
MiNi Hi-Fi COMPONENT SYSTEM
HCD-GN600
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 ohm unbalanced Intermediate frequency 10.7 MHz
AM tuner section
Tuning range North and Latin American models: 530 – 1,710 kHz
(with the interval set at 10 kHz) 531 – 1,710 kHz (with the interval set at 9 kHz)
Middle Eastern models: 531 – 1,602 kHz
(with the interval set at 9 kHz)
Other models: 531 – 1,602 kHz
(with the interval set at 9 kHz) 530 – 1,710 kHz
(with the interval set at 10 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz
General
Power requirements Mexican models: 127 V AC, 60 Hz Argentina models: 220 V AC, 50/60 Hz Other models: 120 V, 220 V or 230 - 240 V AC, 50/60 Hz
Adjustable with voltage selector Power consumption 145 watts Dimensions (w/h/d) Approx. 280 x 360 x 386.5 mm Mass : Approx. 10.5 kg
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C dur­ing repairing.
• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or unsoldering.
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra­diation exposure.
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
Design and specifications are subject to change without notice.
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.
2
TABLE OF CONTENTS
HCD-GN600
1. SERVICING NOTES ................................................ 4
2. GENERAL
Location of Controls ....................................................... 5
3. DISASSEMBLY
3-1. Case ................................................................................. 8
3-2. Loading (Panel)............................................................... 8
3-3. Front Panel Assy ............................................................. 9
3-4. Tuner Pack, Sub Trans Board ......................................... 9
3-5. CD Mechanism Deck ...................................................... 10
3-6. Game In Board, Tape Mechanism Deck ......................... 10
3-7. CD Switch Board, Display Board .................................. 11
3-8. Volume Board.................................................................. 11
3-9. Subwoofer Board, Rear Panel ........................................ 12
3-10. Main Board...................................................................... 12
3-11. Po wer Amp Board ........................................................... 13
3-12. SW Board, Driver Board................................................. 13
3-13. CD Board, CD Block Assy ............................................. 14
3-14. Sensor Board ................................................................... 14
3-15. Motor (TB) Board ........................................................... 15
3-16. Motor (LD) Board ........................................................... 15
4. TEST MODE.............................................................. 16
5. MECHANICAL ADJUSTMENTS....................... 20
7-14. Schematic Diagram – Display Board – ......................... 43
7-15. Printed Wiring Board – Power Amp Board – ................ 44
7-16. Schematic Diagram – Power Amp Board –................... 45
7-17. Printed Wiring Boards – Trans Board – ........................ 46
7-18. Schematic Diagram – Trans Board – ............................. 47
7-19. IC Block Diagram ........................................................... 48
7-20. IC Pin Function Description ........................................... 49
8. EXPLODED VIEWS
8-1. Case, Rear Panel Section ................................................ 54
8-2. Front Panel Section ......................................................... 55
8-3. Chassis Section ............................................................... 56
8-4. CD Mechanism Deck Section-1
(CDM74-K6BD47S) ....................................................... 57
8-5. CD Mechanism Deck Section-2
(CDM74-K6BD47S) ....................................................... 58
9. ELECTRICAL PARTS LIST ............................... 59
6. ELECTRICAL ADJUSTMENTS
Deck section .................................................................... 20
CD Section ...................................................................... 22
7. DIAGRAMS
7-1. Circuit Board Location ................................................... 26
7-2. Block Diagram – CD Servo Section –........................... 28
Block Diagram – Tuner/Tape Deck Section – ............... 29
Block Diagram – Main/Power Section –....................... 30
Block Diagram – Display Section – .............................. 31
7-3. Printed Wiring Board – CD Board – ............................. 32
7-4. Schematic Diagram – CD Board – ................................ 33
7-5. Printed Wiring Board – CD Mechanism Board – ......... 34
7-6. Schematic Diagram – CD Mechanism Board – ............ 35
7-7. Printed Wiring Boards – Main Board – ......................... 36
7-8. Schematic Diagram – Main Board (1/3) – .................... 37
7-9. Schematic Diagram – Main Board (2/3) – .................... 38
7-10. Schematic Diagram – Main Board (3/3) – .................... 39
7-11. Printed Wiring Boards
– Game In, CD Switch Board – ...................................... 40
7-12. Schematic Diagram
– Game In, CD Switch Board – ...................................... 41
7-13. Printed Wiring Board – Display Board – ...................... 42
3
HCD-GN600
SECTION 1

SERVICING NOTES

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 pick-up block. Therefore, when checking the laser diode emis­sion, observe from more than 30 cm away from the objective lens.
LASER DIODE AND FOCUS SEARCH OPERATION CHECK
Carry out the “S curve check” in “CD section adjustment” and check that the S curve waveforms is output three times.
• MODEL IDENTIFICATION – Back Panel –
PA RT No.
MODEL PART No.
E2 model 4-244-103-0 E51 model 4-244-103-1 Mexican model 4-244-103-2
Argentina model 4-244-103-3
[]
[]
[]
[]
• Abbreviation E2 : 120 V AC Area in E model E51 : Chilean and Peruvian model
4
Main unit
ALPHABETICAL ORDER A - D
ALBUM +/- qg AMP MENU rd CD r; CD SYNC qj DECK A wk DECK B wd DIRECTION 9 DISC 1~3 3 DISC SKIPEX-CHANGE 4 Disc tray 6 DISPLAY ra
Display 2
E - L
EDIT 9 EFFECT ON/OFF rf FM MODE 8 GAME eh GAME EQ ea
SECTION 2

GENERAL

GAME INPUT (jacks) wj GAME MIXING ef GROOVE ed IR (receptor) rs ILLUMINATION wl
M - Q
MD (VIDEO) ej MIC (jack) wh MIC LEVEL wg MOVIE EQ qh MUSIC EQ eg OPEN/CLOSE Z 5 P FILE wa PHONES (jack) wf PLAY MODE 7 Power illuminator e; PUSH ENTER q;
4 5 61 2 3
This section is extracted from instruction manual.
R - Z
REC PAUSE/START qk REPEAT 8 SURROUND
TAPE A/B ek TUNER/BAND el TUNER MEMORY 7 VOLUMEws
SYMBOLS
@/1 (power) 1 hH (play) qa x (stop) qs X (pause) qd
. (go backward) qf > + (go forward) qf m (rewind) qg M (fast forward) qg
V/v/B/b q;
A A (Eject A) es A B (Eject B) ql
w;
HCD-GN600
r r
e
ej
eg
ed
ea wl
rf
d
r
s
a
r;
l
e
k
eh
ef
es
e;
wk
wj
wgwh
wf
7
9
qa
qd
qg
qj
q
wa
wd
8
0
qs
qf
qh
qk
l
w;
ws
5
HCD-GN600
Remote Control
ALPHABETICAL ORDER
This section is extracted from instruction manual.
A - M
CD ql CLEAR 7 CLOCK/TIMER SELECT 2 CLOCK/TIMER SET 3
D.SKIP 9 ENTER qd
EFFECT ON/OFF qf GAME w; MD (VIDEO) q;
P - Z
PRESET - wd PRESET + wf PRESET EQ qj P FILE qh SURROUND
SLEEP 1 TAPE A/B qa TUNER/BAND qk TUNING - wa
qs
TUNING + ws VOL +/- 8
SYMBOLS
@/1 (power) 4 nN (p X (pause) 5 x (stop) 6 .(go backward) wd > (go forward) wf m (rewind) wa M (fast forward) ws
M/m/</, qg
lay)
wg
wg
wf wd ws wa
w; ql
qk
qj
qh
123
4 5
6 7
8 9
q; qa qs
qd
qf
qg
6
• This set can be disassembled in the order shown below.
SET
CASE
LOADING (PANEL)
FRONT PANEL ASSY
HCD-GN600
SECTION 3

DISASSEMBLY

CD MECHANISM DECK
REAR PANEL
MAIN BOARD
POWER AMP BOARD
TUNER PACK,
SUB TRANS BOARD
SW BOARD,
DRIVER BOARD
CD BLOCK ASSY
GAME IN BOARD,
TAPE MECHANISM DECK
CD SWITCH BOARD,
DISPLAY BOARD
VOLUME BOARD
SENSOR BOARD
MOTOR (TB) BOARD
MOTOR (LD) BOARD
CD BOARD,
OPTICAL PICK-UP
(KSS-213DCP)
7
HCD-GN600
)
Note: Follow the disassembly procedure in the numerical order given.

3-1. CASE

6
Case
1
Three screws
(case 3 TP2)
2
Five screws
(+BVTT3 x 6)
5
4
3
T wo screws
(+BVTT3 x 6

3-2. LOADING (PANEL)

CD mechanismdeck (CDM74-K6BD47S)
1
Turn the pulley to the arrow direction.
Pulley
Front side
Pull out disc tray
2
4
3
1
Three screws
(case 3 TP2)
Loading (panel)
8

3-3. FRONT PANEL ASSY

d
8
3
Screw (BVTP3 x 10)
Front panel ASSY
1
(flat type)
7
From CN607 on
Game in board
HCD-GN600
T wo wires
MAIN boar
CN402
CN304
2
Four screws (BVTP3 x 10)

3-4. TUNER PACK, SUB TRANS BOARD

1
Wire (flat type)
(11 core)
4
CN971
8
Sub trans board
6
From deck A head
3
Screw (BVTP3 x 10)
3
T uner pack
4
From deck B head
5
From CN606 on Game in board
2
Two screw (BVTP3 x 10)
7
Three screws
(BVTP3 x 10)
6
CN976
5
CN974
9
HCD-GN600
)
)

3-5. CD MECHANISM DECK

4
CD mechanism deck
3
CN701
2
Wire (flat type) (31 core)
1
Two screws (BVTP3 x 10
CN201

3-6. GAME IN BOARD, TAPE MECHANISM DECK

8
Tape mechanism deck
2
Screw (+PTT2 x 4)
7
Three screws
(+BVTP2.6 x 8)
MAIN board
4
Two screws (+BVTP2.6 x 8)
2
Screw (+PTT2 x 4)
Shield plate (GHX)
3
T wo screws
(+BVTP2.6 x 8
10
1
Knob (MIC)
6
GAME IN board
5
T wo screws
(+BVTP2.6 x 8)

3-7. CD SWITCH BOARD, DISPLAY BOARD

)
)
1
Six screws
(+BVTP2.6 x 8)
2
CD SWITCH board
4
Five screws
(+BVTP2.6 x 8)
5
3
Wire (flat type) (17 core)
from CN604
DISPLAY board
4
Five screws
(+BVTP2.6 x 8
HCD-GN600

3-8. VOLUME BOARD

1
Knob (VOL)
5
VOLUME board
4
Four claws
3
Three screws
(+BVTP2.6 x 8)
3
Three screws
(+BVTP2.6 x 8
2
Hexagonal nut
11
HCD-GN600
)
)

3-9. REAR PANEL

6
rear panel
with fan
1
two screws
(+BVTT3 x 6)
2
two screws
(+BVTP3 x 10
3
three screws
(+BVTP3 x 10
4
three screws
(+BVTP3 x 10)

3-10. MAIN BOARD

1
Connector
CN998
TRAN board
main board
5
connector
CN851
4
POWER AMP board (CN503, 504)
MAIN board (CN901, 902)
5
6
MAIN board
12
Lug
2
Screw
(+BVTP3 x 10)
3
Two screws
(+BVTP3 x 10)

3-11. POWER AMP BOARD

d
d
3
Bracket (HS)
2
T wo screws
(+BVTP3 x 10)
6
T wo screws
(+BVTP3 x 10)
4
T wo screws
(+BVTP3 x 10)
5
Three screws
(+BVTP3 x 10)
7
POWER AMP boar
HCD-GN600
1
Connector
from CN997

3-12. SW BOARD, DRIVER BOARD

2
SW board
3
1
Screw
(+BTTP (M2.6))
CN704
7
CN702 (flat type)
4
CN703
6
DRIVER boar
5
Two
screws
(+BTTP (M2.6))
13
HCD-GN600

3-13. CD BOARD, CD BLOCK ASSY

9
(insulator)
8
2
Holder (213) ASSY
qh
CD block ASSY
0
Two
insulators
Two
coil springs
Two stoppers (BU)
qa
3
Floating
(+PTPWH M2.6)
1
Floating
(+PTPWH M2.6)
6
Two
5
(insulator)
4
Two floating
(+PTPWH M2.6)
screw
screw
insulators
Two
coil springs
screws

3-14. SENSOR BOARD

2
Tray
7
(BVTT M2.6)
qd
Remove the four solderings of motor.
1
Floating
(+PTPWH M2.6)
6
Floating
(+PTPWH M2.6)
screw
8
Screw
(+BTTP (M2.6))
screw
Two screws
9
SENSOR board
0
CN731
qf
CN708 (flat type)
qg
CD board
qs
Screw (+BTP 2.6x 8)
3
Belt (table)
4
Foating
(+PTPWH M2.6)
5
screw
Pulley (table)
14
7
Gear (geneva)

3-15. MOTOR (TB) BOARD

1
6
Table motor ASSY (M741)
HCD-GN600

3-16. MOTOR (LD) BOARD

4
Remove the two solderings of motor.
5
Loading motor ASSY (M751)
2
4
MOTOR (TB) board
5
Remove the two solderings of motor.
3
Two
screws
(+BTTP (M2.6))
2
Two
screws
(+BTTP (M2.6))
3
CN742 (flat type)
MOTOR (LD) board
1
Belt (loading)
15
HCD-GN600
SECTION 4

TEST MODE

[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube, LED, model, destination, software version, volume, key and VACS level.
Procedure:
1. Press x button, [AMP MENU] 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] b utton. The model and destination are displayed.
4. Each time
MC version, GC version, CD version, CDDM version, CDMA version, CDMB version, BDA v ersion, BDB version, ST version, T A version, TM v ersion and TC version in this order , and returns to the MC version display.
5. When
are being displayed except model and destination, the date of the software creation appear. When again, the display returns to the software version display . When
[DISC 1] b utton is pressed, the display changes from
[DISC 3] button is pressed while the version numbers
[DISC 3] button is pressed
[DISC 1] b utton 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
7. In the key check mode, the fluorescent indicator tube displays
8. When
9. When
10. T o release this mode, press three buttons in the same manner as
[DISC 2] button, the key check mode is activated.
“K 0 V 0”. Each time a button is pressed, “K” value increases. However, once a button has been pressed, it is no longer taken into account. “V” value increases in the manner of 0,1, 2, 3 ... if knob is turned clockwise, or it decreases in the manner of 0, 9, 8,7 ... if
[VOLUME] knob is turned counter-clockwise.
[VOLUME]
[DISC 3] button is pressed after all LEDs and segments
in fluorescent indicator tube light up, the fluorescent indicator tube displays “VACS A + B”. A is VACS level which is trigger by signal level while B is VACS lev el which is trigger by thermal. Total VACS value would be the sum of A and B.
[DISC SKIP/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 half of alternate segments in fluorescent indicator tube would light up. Pressing would case all segments lights up.
step 1, or disconnect the power cord.
[DISC SKIP/EX-CHANGE] button again, another
[DISC SKIP/EX-CHANGE] button again
[MC TEST MODE]
• This mode is used to check operations of the respective sections of Amplifier, Tuner , and Tape.
Procedure:
* To enter MC Test Mode
1. Press x button, [AMP MENU] button and [DISC 3] button
simultaneously.
2. The TAPE A and TAPE B segments 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.
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 the sound volume increases to its maximum and a message “VOLUME MAX” appears for two seconds, then the display returns to the original display.
5. When the 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.
* Check of clock frequency
1. To check the frequency of clock used to run the clock of the system, the clock output is available at IC501 pin ek (CLOCK- OUT) on the MAIN board during MC test mode.
2. The frequency is 32.768 kHz.
* T ape function
1. When a tape is inserted in Deck B and recording is started, the function is changed to VIDEO automatically . When button is pressed during recording in function, ALC (Automatic Logic Control) is turned on.
2. After recording is stopped by pressing x button, press
button will change the function to TAPE B and rewind Tape B until the recording start position and playback of Tape B is started. If the pause and pressed again to resume recording during recording time, when tape deck B is rewind, tape deck B 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
[VOLUME] knob is turned clockwise even slightly,
[VOLUME] knob is turned counter-clockwise even
[CD SYNC]
m
[REC PAUSE/ START] button is pressed for a
[DIRECTION] button. Insert a test tape AMS-110A or AMS-
120 to selected tape deck.
3. Press the
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 off after detecting the AMS signal twice.
6. When the check is complete, a message of either OK or NG appears.
* To release MC Test mode.
1. To release this mode, press
2. The cold reset is enforced at the same time.
[AMP MENU] button to enter the AMS test mode.
button.
?/1
16
HCD-GN600
[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 button, [AMP MENU] button, and
simultaneously.
2. The fluorescent indicator tube becomes blank for a while, and
the set is reset.
?/1
button
[VACS ON/OFF]
This mode is used to switch ON and OFF the VACS (Variable Attenuation Control System).
Procedure:
1. Press
2. Press
simultaneously. The message VACS OFF or VACS ON appears.
button to turn the set ON.
?/1
[AMP MENU] button and [GAME MIXING] button
[TUNER STEP CHANGE]
The step interval of AM channels can be toggled between 9 kHz and 10 kHz.
Procedure:
1. Press
2. Press
3. Press
4. Press [AMP MENU] button and
The system will turn ON automatically. The message AM 9k STEP or AM 10k STEP appears and thus the channel step is changed.
button to turn the set ON.
?/1
[TUNER/BAND] button to select the “AM.
button to turn the set OFF.
?/1
button simultaneously.
?/1
[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 are no error occurs, the aging operation would continues repeatedly.
Procedure:
1. Press
2. Select CD function.
3. Load three discs on the disc tray.
4. Press
and press the
5. Press x button, [AMP MENU] button, and [DISC SKIP/ EX-
button to turn the set ON
?/1
[PLAY MODE] button to select the ALL DISCS mode,
[REPEAT] button to select REPEA T OFF mode.
CHANGE] button simultaneously.
6. Aging operation is started.
7. To release this mode, press
power cord to turn the power OFF.
2. Aging mode sequence:
Start (from disc 1)
Disc chucking
TOC read
Play first track for 2 seconds
Play last track for 2 seconds
button or disconnect the
?/1
[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. Pressbutton to turn the set ON.
2. Select CD function.
3. Press x , [AMP MENU] button, and
simultaneously.
4. The CD service mode is activated. The message “SERVICE
MODE appears.
5. With the CD in stop status, press
optical pick-up to outside track, or press to inside track. The message SLED OUT or SLED IN
appears.
6. To release this mode, press
?/1
OPEN/CLOSE
Z
button to move the
M
m
button.
button
button to move
EX-change open/close
Open the disc tray
Disc skip
Close the tray
Change the next disc.
17
HCD-GN600
>
Display when an error occurred (CD Error Code Mode)
Procedure:
1. Press x button, [AMP MENU] button and [DISC 1] button simultaneously to enter the error code display mode.
2. The fluorescent indicator tube displays the number of total error .
3. Each time change as below
m
m
4. To clear the error record, operate the cold reset. (Refer to the MC COLD RESET)
5. To release this mode, press the power plug to turn the power OFF.
1) Display of total error
button or
M
Display of total error Button Display of Mechanical errors Button
Display of no disc errors
Display
button is pressed, display
m
+
M
Button
+
M
Button
button or disconnect the
?/1
3) Display of no disc errors
Display
D*$$%%&&##00
D*: The number of mechanical error (“00” is latest one) (Press $$: 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)
button or
button to display next error)
.
EMC**EDC**
EMC**: The number of mechanical errors. EDC**: The number of no disc errors after chucking the disc.
2) Display of mechanical errors
Display
M*$$%%&&##00
M*: The number of mechanical error (“00” is latest one) (Press $$: Not used
%%: Loading related error (Second figure is not used)
D: Stop by the problem other than mechanical problem while
E: Stop by the problem other than mechanical problem while
C: Stop by the problem other than mechanical problem while
F: Stop by the problem other than mechanical problem while
&&: 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
button or
>
closing.
opening.
chucking up.
chucking down.
button to display next error)
.
[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.
Procedure:
1. Press
2. Select CD function.
3. Press x button, [REPEAT] button and [CD] button
simultaneously to enter the CD repeat 5 limit off mode and the
fluorescent indicator tube displays LIMIT OFF”.
3. To release this mode, operate the cold reset. (Refer to the “MC
COLD RESET”)
button to turn the set ON.
?/1
[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
2. Select CD function.
3. Press x button, [AMP MENU] button and [GAME] 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.
button to turn the set ON.
?/1
18
HCD-GN600
[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
2. Select CD function.
3. Press [CD] button and
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.
button to turn the set ON.
?/1
?/1
button simultaneously. The 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
2. Select CD function.
3. Press
4. Press x button and
power on automatically.
5. The message “CD POWER ON” or “CD POWER OFF” will
be displayed on the fluorescent indicator tube.
button to turn the set ON.
?/1
button to turn the set OFF.
?/1
?/1
button simultaneously . The set will
[CD TRAY LOCK MODE]
This mode let you lock the disc trays. When this mode is activated, the disc tray will not open when button or [DISC SKIP/EX-CHANGE] button is pressed. The
message LOCKED will be displayed in the will be displayed on the fluorescent indicator tube.
Procedure:
1. Press
2. Select CD function.
3. Press x button and
and hold down until “LOCKED” or “UNLOCKED” displayed on the fluorescent indicator tube (around 5 seconds).
button to turn the set ON.
?/1
OPEN/CLOSE
Z
OPEN/CLOSE
Z
button simultaneously
[MD/VIDEO SWITCHING]
This mode let you switch from MD to VIDEO and vice-versa.
Procedure:
1. Press
2. Select MD function.
3. Press [MD (VIDEO)] button and
The function will change to VIDEO. Press the same buttons again to change from VIDEO to MD.
button to turn the set ON.
?/1
button simultaneously .
?/1
19
HCD-GN600
SECTION 5

MECHANICAL 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)
SECTION 6

ELECTRICAL ADJUSTMENTS

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
RECORD/PLAYBACK HEAD AZIMUTH ADJUST­MENT
DECK A DECK B
Note: Perform this adjustments for both decks
Procedure:
1. Mode: Playback
test tape P-4-A100 (10 kHz, –10 dB)
0 dB=0.775 V
MAIN board CN301 Pin
1 3
Pin
set
MAIN board CN301
2
Pin
(L-CH) (R-CH)
(GND)
level meter
+ –
20
HCD-GN600
e
attenuator
set
MAIN board MD/VIDEO (AUDIO) IN (J750)
1) 315 Hz
2) 10 kHz
50 mV (–23.8 dB)
  
600
blank tape CN-123
AF OSC
+
set
recorded portion
MAIN board CN301 Pin
2
(GND)
MAIN board CN301 Pin
1
(L-CH)
Pin
3
(R-CH)
level meter
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 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
3. Mode: Playback
test tape P-4-A100 (10 kHz, –10 dB)
L-CH
MAIN board CN301 set
R-CH
pin
L R
pin
1
pin
3
2
oscilloscop
H
V
REC BIAS ADJUSTMENT DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for this adjustment. In the REC memory mode , when the REC starts the input signal FUNCTION is switched to VIDEO automatically. When the REC stops, the tape returns near to the 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.
4. Mode: Record
5. Mode: Playback
waveform of oscilloscope
in phase 45°90°135°180
good
wrong
°
4. After the adjustments, apply suitable locking compound to the pats adjusted.
Adjustment Location: Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
6. Confirm the playback signal recorded in step 3 becomes adjustable level as follows. If these levels are not adjustable level, adjust the RV304 (L­CH) and RV354 (R-CH) on the MAIN board to repeat steps 4 and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz: ±1.0 dB
Adjustment Location: MAIN board
forward
reverse
21
HCD-GN600
+
CD board
TP4 (FE)
TP7 (DVC)
oscilloscope
REC LEVEL ADJUSTMENT DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for this adjustment. In the REC memory mode , when the REC starts the input signal FUNCTION is switched to VIDEO automatically. When the REC stops, the tape returns near to the 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.
4. Mode: Record
MAIN board MD/VIDEO (AUDIO) IN (J117)
AF OSC
5. Mode: Playback
315 Hz, 50 mV (–23.8 dB)
attenuator
600
blank tape CS-123
set
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
Connection:
Procedure:
1. Connect an oscilloscope to test point TP4 (FE) and TP 7(DVC)
on the CD board.
2. Turn the power on.
3. Put the disc (YEDS-18) in and turned power switch on again
and actuate the focus search. (actuate the focus search when disc table is moving in and out)
4. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak lev el within 2.4 ± 1 Vp-p.
MAIN board
recorded portion
CN301
1
Pin Pin
3
set
MAIN board CN301 Pin
(L-CH) (R-CH)
2
level meter
+
(GND)
6. Confirm the play back signal recorded in step 3 becomes adjustable level as follows. If these levels are not adjustable level, adjust the RV301 (L­CH) and RV351 (R-CH) on the MAIN board to repea t 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) –
REC LEVEL
ADJUSTMENT

S-curve waveform
symmetry
A
B
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.
within 2.4
±
1 Vp-p
Checking Location: CD board (SIDE B)
(See page 24.)
22
31 CN301
(R-CH)
RV351
REC BIAS ADJUSTMENT
IC301
RV304
(L-CH)
(R-CH)
RV301
(L-CH)
RV354

Loading...
+ 50 hidden pages