Sony HCDGRX-66 Service manual
HCD-GRX5/RX66
SERVICE MANUAL
HCD-GRX5/RX66 is the Amplifier, CD
player, Tape Deck and Tuner section in
MHC-GRX5/RX66.
Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
Photo: HCD-RX66
CD
Section
T APE
DECK
Section
US Model
Canadian Model
HCD-RX66
E Model
Austr alian Model
HCD-GRX5
Model Name Using Similar Mechanism HCD-H991AV
CD Mechanism Type
Base Unit Type BU-5BD29AL
Optical Pick-up Type KSS-213D/Q-NP
Model Name Using Similar Mechanism NEW
Tape Tr ansport Mechanism Type
CDM38L-5BD29AL/
CDM38LH-5BD29AL
TCM-230AWR1/
230PWR1
SPECIFICA TIONS
AUDIO POWER SPECIFICATIONS:
(U.S.A. model only)
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
with 6 ohm loads both channels driven, from 70 - 20,000 Hz; rates 60
watts per channel minimum RMS power, with no more than 0.9% total
harmonic distortion from 250 milliwatts to rated output.
Amplifier section
Canadian model:
Continuous RMS power output (reference)
60 + 60 watts
(6 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 45 W)
Other models:
The following measured at AC 110, 220 V 50/60 Hz
DIN power output (rated) 50 + 50 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
65 + 65 watts
(6 ohms at 1 kHz, 10% THD)
The following measured at AC 120, 240 V 50/60 Hz
DIN power output (rated) 60 + 60 watts
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
75 + 75 watts
(6 ohms at 1 kHz, 10% THD)
Peak music power output (reference)
1000 watts
Inputs
MD/VIDEO IN: voltage 450 mV,
(phono jacks) impedance 47 kilohms
MIX MIC: (phone jack) sensitivity 1 mV, impedance 10
kilohms
– Continued on next page –
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
Specifications (continued)
Outputs
MD/VIDEO OUT: voltage 250 mV,
(phono jacks) impedance 1 kilohms
PHONES: accepts headphones of 8 ohms
(stereo phone jack) or more
SPEAKER: accepts impedance of 6 to 16 ohms
SUPER WOOFER: Voltage 1 V, impedance 1 kilohm
CD player section
System Compact disc and digital audio system
Laser Semiconductor laser (λ=780nm)
Emission duration: continuous
Laser output Max. 44.6 µW*
*This output is the value measured at
distance of 200 mm from the objective
lens surface on the Optical Pick-up
Block with 7 mm aperture.
Frequency response 2 Hz - 20 kHz (±0.5 dB)
Wavelength 780 -790 nm
Signal-to-noise ratio More than 90 dB
Dynamic range More than 90 dB
CD OPTICAL DIGITAL OUT
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level -18 dBm
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 40 - 13,000 Hz (±3 dB),
(DOLBY NR OFF) using Sony TYPE I cassette
40 - 14,000 Hz (±3 dB),
using Sony TYPE II cassette
Wow and flutter ±0.15% W.Peak (IEC)
0.1% W .RMS (N AB)
±0.2% W .Peak (DIN)
General
Power requirements
North American models: 120 V AC, 60 Hz
Mexican model: 120 V AC, 50/60 Hz
Australian, and Israel models:
220 - 240 V AC, 50/60 Hz
Thai model: 220 - 240 V AC, 50/60 Hz
Other models: 110 - 120 V or 220 - 240 V AC,
50/60 Hz
Power consumption
U.S.A. model: 140 watts
Canadian model: 120 watts
Other models: 140 watts
Dimensions (w/h/d) Approx. 280 × 335 × 380 mm
(111/8 × 131/8 × 15 in.)
Mass
U.S.A. model: Approx. 8.8 kg (19 lbs. 6 oz.)
Canadian model: Approx. 8.4 kg (18 lbs. 8 oz.)
Other models: Approx. 9.4 kg (20 lbs. 12 oz.)
Supplied accessories: AM loop antenna (1)
Remote RM-SR5 (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (2)
Front speaker pads (8)
Design and specifications are subject to change without notice.
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 American models: 530 - 1,710 kHz
Middle Eastern models:
MW: 531 - 1,602 kHz
SW: 5.95 - 17.90 MHz
Other models:
MW: 531 - 1,602 kHz
SW: 5.95 - 17.90 MHz
Antenna AM loop antenna
Antenna terminals External antenna terminal
Intermediate frequency 450 kHz
(with the interval set at 10 kHz)
531 - 1,710 kHz
(with the interval set at 9 kHz)
(with the interval set at 9 kHz)
(with the interval set at 5 kHz)
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz)
(with the interval set at 5 kHz)
– 2 –
SECTION 1
SERVICING NOTES
TABLE OF CONTENTS
1. SERVICING NOTES ............................................... 3
2. GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3. DISASSEMBLY ......................................................... 8
4. TEST MODE.............................................................. 11
5. MECHANICAL ADJUSTMENTS....................... 13
6. ELECTRICAL ADJUSTMENTS
DECK Section ................................................................. 13
CD Section ...................................................................... 16
7. DIAGRAMS................................................................. 18
7-1. Block Diagram
– CD MECHANISM DECK Section – .......................... 19
7-2. Block Diagram
– TAPE DECK Section – ................................................ 21
7-3. Block Diagram
– MAIN Section – ........................................................... 23
7-4. Block Diagram
– DISPLAY/KEY CONTROL/POWER SUPPLY
Section – ........................................................................ 25
7-5. Printed Wiring Boards – CD Section – ......................... 29
7-6. Schematic Diagram – CD Section – ............................... 31
7-7. Printed Wiring Board – CD MOTOR Section – ............ 33
7-8. Schematic Diagram – CD MOTOR Section – .............. 35
7-9. Printed Wiring Board – TAPE DECK Section – ........... 37
7-10. Schematic Diagram – TAPE DECK Section –.............. 39
7-11. Printed Wiring Board – LEAF SW Section – ............... 41
7-12. Schematic Diagram – LEAF SW Section – .................. 41
7-13. Printed Wiring Board – MAIN Section – ...................... 43
7-14. Schematic Diagram
– MAIN Section (1/4) – .................................................. 45
7-15. Schematic Diagram
– MAIN Section (2/4) – .................................................. 47
7-16. Schematic Diagram
– MAIN Section (3/4) – .................................................. 49
7-17. Schematic Diagram
– MAIN Section (4/4) – .................................................. 51
7-18. Printed Wiring Board – PANEL Section – .................... 53
7-19. Schematic Diagram – PANEL Section –....................... 55
7-20. Printed Wiring Board – CD-SW Section –.................... 57
7-21. Schematic Diagram – CD-SW Section – ...................... 57
7-22. Printed Wiring Board – HP Section – ........................... 59
7-23. Schematic Diagram – HP Section – .............................. 59
7-24. Printed Wiring Board – POWER AMP Section – ......... 60
7-25. Schematic Diagram – POWER AMP Section –............ 61
7-26. Printed Wiring Board
– TRANSFORMER Section – ........................................ 63
7-27. Schematic Diagram
– TRANSFORMER Section – ........................................ 64
7-28. IC Pin Function Description ........................................... 68
8. EXPLODED VIEWS ................................................ 73
9. ELECTRICAL PARTS LIST ............................... 82
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.
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.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
CAUTION : INVISIBLE LASER RADIATION WHEN OPEN AND INTER-
LOCKS DEFEATED. AVOID EXPOSURE TO BEAM.
ADVARSEL : USYNLIG LASERSTRÅLING VED ÅBNING NÅR
SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FOR
STRÅLING.
VORSICHT : UNSICHTBARE LASERSTRAHLUNG, WENN ABDECKUNG
GEÖFFNET UND SICHEREITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM
STRAHL AUSSETZEN.
VARO
!
ALTTIINA NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.
VARNING : OSYNLING LASERSTRÅLING NÄR DENNA DEL ÄR
ÖPPNAD OCH SPÄRREN ÄR URKOPPLAD. BETRAKTA EJ STRÅLEN.
ADVERSEL : USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG
SIKKERHEDSLÅS BRYTES. UNNGÅ EKSPONERING FOR STRÅLEN.
VIGYAZAT!: A BURKOLAT NYITÁSAKOR LÁTHATATLAN
LÉZERSUGÁRVESZÉLY! KERÜLJE A BESUGÁRZÁST
: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET
!
– 3 –
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED
LINE WITH MARK ! ON THE SCHEMA TIC 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.
MODEL IDENTIFICATION
– Back Panel –
PART No.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microampers.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.
2. A battery-operated AC milliammeter . The Data Pr ecision 245
digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC voltmeter. The “limit” indication is 0.75 V, so analog meters must have an accurate lowvoltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V A C range are suitable. (See Fig. A)
MODEL PART No.
RX66: US model 4-996-725-0π
RX66: Canadian model 4-996-725-1π
GRX5: Thai and Israel models 4-996-725-2π
GRX5: E model 4-996-842-0π
GRX5: Malaysia, Singapore and
South African models
GRX5: Saudi Arabia and Taiwan models 4-996-842-2π
GRX5: Hong Kong model 4-996-842-3π
GRX5: Australian model 4-996-842-4π
GRX5: Mexican model 4-996-842-5π
GRX5: Indonesian model 4-996-842-7π
4-996-842-1π
To Exposed Metal
Parts on Set
1.5 k
0.15 µF
Fig. A. Using an AC voltmeter to check AC leakage.
Ω
Earth Ground
AC
voltmeter
(0.75 V)
– 4 –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
e
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the
direction of arrow.
NOTE FOR INSTALLATION (ROTARY ENCODER)
BU cam
Section A
Groove
Note:When attaching the BU cam,
engage the Rotary encoder
switch as shown in the figure.
Note:When attaching the Base unit, Insert th
section A into the groove of BU cam.
– 5 –
LOCATION OF CONTROLS
1 2 3 4
!∞
!§
!¶
!•
!ª
@º
@¡
@™
@£
SECTION 2
GENERAL
5
6
7
8
9
!º
!¡
!™
!£
!¢
1 I /u (Power) button
2 DISC 1 to 3 buttons and indicators
3 DISC SKIP/EX-CHANGE button
4 6 (CD) button
5 CD disc tray
6 CD, ^ button and indicator
7 TUNER, BAND button
8 r REC button and indicator
9 P PAUSE button and indicator
!º HI-DUB button
!¡ CD SYNC button
!™ FILE SELECT button
!£ SURROUND button
!¢ KARAOKE PON/MPX button
!∞ TAPE B, 9 and ( buttons and indicators
!§ TAPE A, 9 and ( buttons and indicators
!¶ FUNCTION button
!• MIC LEVEL knob
!ª MIX MIC jac
@º DISPLAY/DEMO button
@¡ CLOCK/TIMER SET button
@™ TIMER SELECT button
@£ p button
#º
#¡
#™
#£
#¢
#∞
#§
@¢
#¶ #• #ª $º $¡ $™ $£
@∞
@§
@¶
@•
@ª
@¢ Fluorescent indicator tube
@∞ ENTER/NEXT button and indicator
@§ GROOVE button and indicator
@¶ VOLUME konb
@• PHONES jack
@ª DBFB button
#º Remote sensor
#¡ FLASH button
#™ NON-STOP button and indicator
#£ LOOP button
#¢ EDIT, DIRECTION button
#∞ PLAY MODE, DOLBY NR button
#§ REPEAT button
#¶ § button (deck A)
#• Tape deck A
#ª –, 0 button and indicator
$º JOG dial
$¡ +, ) button and indicator
$™ Tape deck B
$£ § button (deck B)
– 6 –
– 7 –
SECTION 3
)
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
6
CASE
2
screw
(CASE3 TP2) (3 × 12)
3
two screws
(CASE3 TP2) (3 × 8)
case
1
three screws
(BVTP3 × 8)
FRONT PANEL SECTION
4
loading panel
4
5
1
Turn the cam to the direction
of arrow
A
.
4
2
screw
(CASE3 TP2) (3 × 12)
3
two screws
(CASE3 TP2) (3 × 8
9
screw
(BVTP3
2
Pull-out the
disc tray.
×
10)
3
two claws
0
three screws
(BVTT3
A
5
wire (flat type)
(15 core) (33 cm)
(CN106)
9
screw
(BVTP3
8
connector
(CN109)
×
6)
×
10)
6
wire (flat type) (13 core)
(23 cm) (CN201)
7
wire (flat type)
(17 core) (CN107)
– 8 –
TAPE MECHANISM DECK SECTION (TCM-230AWR1/TCM-230PWR1)
1
Push the
cassette lids.
3
three screws
(BVTP3
×
8)
2
Open the
cassette lids.
4
two screws
(BVTP3
×
8 )
5
tape mechanism
deck section
(TCM-230AWR1/
TCM-230PWR1)
4
CD mechanism deck section
CDM38L-5BD29AL
CDM38LH-5BD29AL
3
two screws
(BVTP3
×
8)
2
wire (flat type)
(19 core) (CN105)
1
two connectors
(CN103, CN104)
CD MECHANISM DECK SECTION (CDM38L-5BD29AL /CDM38LH-5BD29AL)
Note: The CD mechanism deck will
fall if three screws are removed.
Support it by hand, then remove
three screws.
– 9 –
MAIN BOARD
Abbreviation
AUS : Australian
EA4 : Israel
MY : Malaysia
TW : Taiwan
1
connector
(CN11)
E2 : 120 V A C Area in E model
HK : Hong Kong
SAF : South African
E3 : 240 V A C Area in E model
IA : Indonesian
SP : Singapore
3
four screws
(BVTP3 × 8)
2
wire (flat type) (13 core) (14 cm)
(CN102) (GRX5: E2, EA4, TH,
MX, AUS/RX66)
wire (flat type) (15 core) (14 cm)
(CN102) (GRX5: E3, EA3, MY,
SP, IA, HK, TW, SAF)
EA3 : Saudi Arabia
MX : Mexican
TH : Thai
6
MAIN board
4
two screws
(BVTP3 × 6)
5
connector
(CN101)
– 10 –
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 p , [ENTER/NEXT], and I/u simulta-
neously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Delivery 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 I/u button to turn the set ON.
2. Press [LOOP] button and I/u button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator
tube, and the CD delivery 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 p , [ENTER/NEXT], and [DISC1] simul-
taneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[Sled Servo Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pickup.
Procedure:
1. Press
2. Select the function “CD”.
3. Press three buttons p , [ENTER/NEXT], and § simulta-
4. The Sled Servo mode is selected, if “CD” is blanking on the
5. With the CD in stop status, press ) + button to move the
6. To exit from this mode, perform as follows:
Note: • Always move the pickup to most inside track when exiting from
I/u button to turn the set ON.
neously.
fluorescent indicator tube.
pickup to outside track, or – 0 button to inside track.
1) Move the pickup to the most inside track.
2) Press three buttons in the same manner as step 2.
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 AM Tuner Step between 9 kHz and
10 kHz]
• A step of AM channels can be changed ov er between 9 kHz and
10 kHz.
Procedure:
1. Press I/u button to turn the set ON.
2. Select the function “TUNER”, and press [TUNER/BAND]
button to select the BAND “AM”.
3. Press I/u button to turn the set OFF.
4. Press [ENTER/NEXT] and I/u buttons simultaneously, and
the display of fluorescent indicator tube changes to “AM 9 k
STEP” or “AM 10 k STEP”, and thus the channel step is
changed over.
[LED and Fluorescent Indicator Tube All Lit, Key Check
Mode]
Procedure:
1. Press three buttons p , [ENTER/NEXT], and [DISC2] simul-
taneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press [DISC2] button, and the key check mode is activated.
3. In the key check mode, the fluorescent indicator tube displays
“K 1 J0 V0”. Each time a button is pressed, “K” value increases. However , once a button is pressed , it is no longer taken
into account.
“J” value increases like 1, 2, 3 ... if rotating [JOG] knob in
“+” direction, or it decreases like 0, 9, 8 ... if rotating in “–”
direction.
“V” value increases like 1, 2, 3 ... if rotating [VOLUME] knob
in “+” direction, or it decreases like 0, 9, 8 ... if rotating in
“–” direction.
4. To exit from this mode, press three buttons in the same man-
ner as step 1, or disconnect the power cord.
– 11 –
[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
1) Set disc in DISC1 tray.
2) Load the tapes recording use into the decks A and B respec-
tively.
3) Press three buttons p , [ENTER/NEXT],
and [DISCSKIP/EX-CHANGE] simultaneously.
4) The aging mode is activated, if a CD roulette mark on the fluo-
rescent indicator tube is blinking.
5) To exit from the aging mode, press I/u button to turn the set
OFF.
2. Operation Sequence
• During the aging mode in the following sequence to below.
• Starting the CD section aging for function set “CD”, starting
the TAPE section (deck A) aging for function set “TAPE A” or
“TAPE B”. (Set another function is no work.)
CD (disc1) (12 minutes) → Deck A
↑↓(About 13 minutes
Deck B 20 seconds
maximum)
3. Aging mode in CD section
1) Display state
• No error occurs
display
1 –
[*][*]
@ @
4. 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 The top of tape
2 TAPE A AG-2 FWD play the TAPE A 3 minutes playing
3 TAPE A AG-3 F.F. the TAPE A First either 20 minutes
or the end of tape
4 TAPE A AG-4 REV play the TAPE A 3 minutes playing
5 TAPE A AG-5 Rewind the TAPE A The top of tape
6 TAPE B AG-1 Rewind the TAPE B The top of tape
7 TAPE B AG-2 FWD play the TAPE B 3 minutes playing
8 TAPE B AG-3 F.F. the TAPE B First either 20 minutes
or the end of tape
9 TAPE B AG-4 REV play the TAPE B 3 minutes playing
10 TAPE B AG-5 Rewind the TAPE B The top 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.
(2) A tape on FWD side is played for 3 minutes.
(3) FF is executed up to either made for 20 minutes or the end of
tape.
(4) A tape is reversed, and the tape on REV side is played for 3
minutes.
(5) Rewind is executed up to the top of tape.
(6) Steps 1 through 5 are executed for the other deck.
(7) Change to CD section aging.
Note:
: a letter “CD” and the remainder time (minute) alternately. (re-
[*][*]
mainder time start from 12 minute)
@@: track number in access.
• Error occurred
NO. Display Main factor
1 NO DISC ERR Not set disc in DISC1
2 FOCUS1 ERR Focus does not work
3 FOCUS2 ERR Focus does not work after the disc rotate as usual
4 GFS ERR GFS error
5 FBIAS ERR Error in to the focus bias adjustment
6 SENSOR ERR Disc sensor sens DISC1 is no disc
7 TABLE ERR CD tray lotate does not work
8 TRAY ERR Tray (include BD) move does not work
2) Operation during aging Mode
In the aging mode, the program is executed in the following sequence.
(1) The disc tray turns to select a disc1.
(2) A disc is chucked.
(3) TOC of disc is read.
(4) The pickup accesses to the track 1, and playing 2 seconds.
(5) The pickup accesses to the last track, and playing 2 seconds.
(6) Steps 1 through 5 are repeated about 12 minutes.
(7) Change to deck section aging.
– 12 –
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
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.02 – 0.08 oz • inch)
71 to 143 g • cm
(0.98 – 1.99 oz • inch)
100 g or more
(3.53 oz or more)
100 g or more
(3.53 oz or more)
DECK SECTION
0 dB=0.775 V
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
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
3
(L-CH)
Pin
Pin
1
(R-CH)
level meter
set
main board
CN301
Pin
2
(GND)
+
–
– 13 –
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.
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
[HI-DUB] button.
Procedure:
1. Turn the power switch on.
2. Press the p button, [ENTER/NEXT] button and [DISC3] button
simultaneously.
(The “VOLUME” on the fluorescent indicator tube will blink
while in the test mode.)
To exit from the test mode, press the I/u button.
Mode: Playback
test tape
WS-48B
(3 kHz, 0 dB)
frequency counter
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
L
R
pin
good
3
pin
1
2
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).
3
: L-CH)
1
: R-CH)
+
–
set
main board
CN301 (Pin
(Pin
1. Insert the WS-48B into the deck B.
2. Press the · button on the deck B.
3. Press the [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 ± 180 Hz.
5. Press the [HI-DUB] button.
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 ± 90 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
+
–
forward
reverse
main board
CN301 (Pin
(Pin
3
1
: L-CH)
: R-CH)
Deck A is RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (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: AUDIO board
– 14 –
REC Bias Adjustment DECK B
+
–
set
recorded
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
set
MD/VIDEO (AUDIO) IN
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
600
Ω
attenuator
AF OSC
REC LEVEL
13
RV301
L
RV351
R
CN106
CN301
CN107
RV401
RV301
RV341
RV311
RV411
IC602
CN601
LR
RL
RV441
PB LEVEL
– DECK B –
REC BIAS
LR
PB LEVEL
– DECK A –
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, 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 press
– 0 button then rewind to recording start position.)
1. Press [FUNCTION] 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] button, press P button, then recording
r
start.
4. Mode: Record
MD/VIDEO (AUDIO) IN
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
50 mV (–23.8 dB)
600
Ω
set
blank tape
CN-123
4. Mode: Record
5. Mode: Playback
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 R V351 (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
5. Mode: Playback
6. Confirm playback the signal recorded in step 3 become adjustable level as follows.
If these levels do not adjustable level, adjustment the RV341
(L-CH) and RV441 (R-CH) on the AUDIO board to repeat
steps 4 and 5.
Adjustable level: Playback output of 315 Hz to playback output
Adjustment Location: AUDIO board
REC Level Adjustment
Procedure:
INTRODUCTION
When set to the test mode performed in Tape Speed Adjust-
ment, 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 press
– 0 button then rewind to recording start position.)
1. Press [FUNCTION] 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] button, press P button, then recording
start.
recorded
portion
of 10 kHz: ±1.0 dB
r
set
CN301 (Pin
DECK B
3
1
(Pin
level meter
+
–
: L-CH)
: R-CH)
[MAIN BOARD] (Component Side)
[AUDIO BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
TAPE SPEED
(NORMAL) (HIGH)
RV1002
RV1001
– 15 –
CN1001
V
+
–
BD board
TP (TEO)
TP (VC)
oscilloscope
)
CD SECTION
Note:
1. CD Block is basically designed to operate without adjustment. Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10 MΩ 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.
E-F Balance (Traverse) check
(Without remote commander)
S Curve Check
oscilloscope
BD board
TP (FEO)
TP (VC)
+
–
Procedure:
1. Connect oscilloscope to test point TP (FEO).
2. Connect between test point TP (FOK) and GND by lead wire.
3. Turn Power switch on.
4. Put 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.)
5. Check the oscilloscope waveform (S-curve) is symmetrical
between A and B. And confirm peak to peak level within 3±1
Vp-p.
S-curve waveform
symmetry
A
B
within 3
±
1 Vp-p
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than the ratio of A : B
RF Level Check
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the brightness
to obtain best waveform.
oscilloscope
BD board
TP (RF)
TP (VC)
+
–
Procedure:
1. Connect oscilloscope to test point TP (TEO) on BD board.
2. Turned Power switch on. Press [FUNCTION] button to select
CD.
3. Put disc (YEDS-18) in to play the number five track.
4. Press the p button, [ENTER/NEXT] button and ^ button simultaneously several times to fluorescent indicator tube
display “SHUFFLE” is blink. (The sledding servo is turned
OFF.)
5. Check the level B of the oscilloscope’s waveform and the A
(DC voltage) of the center of the Tr averse waveform.
Confirm the following:
A
× 100 = less than ±7 (%)
B
Traverse waveform
0 V
level: 500
±
100 mVp-p
Center of the waveform
B
A (DC
voltage)
symmetry
6. Press the p button, [ENTER/NEXT] button and ^ button
simultaneously several times to fluorescent indicator tube display “SHUFFLE” is OFF. (The sleding servo is turned ON.)
Confirm the C (DC voltage) is almost equal to the A (DC v oltage) is step 5.
Traverse waveform
0 V
C (DC
voltage
Procedure:
1. Connect oscilloscope to test point TP (RF) on BD board.
2. Turned Power switch on.
3. Put disc (YEDS-18) in and playback.
4. Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
Note: Clear RF signal waveform means that the shape “≈” can be clearly
distinguished at the center of the waveform.
• FR signal
VOLT/DIV: 200 m
TIME/DIV: 500 ns
level:
±
0.3 Vp-p
1.3
Sled servo ONSled servo OFF
– 16 –
Adjustment Location:
[BD BOARD] (Conductor Side)
CNU101
GND
TEO
IC103
CNU102
FEO
RF
IC101
VC
FOK
IC
I02
– 17 –
• Circuit Boards Location
CD-SW board
SECTION 7
DIAGRAMS
TRANSFORMER board
ENCAPSULATED COMPONENT
MAIN board
PANEL board
CONNECTOR board
HP board
SENSOR board
POWER AMP board
MOTOR (TURN) board
BD board
MOTOR (SLIDE) board
AUDIO board
LEAF SW board
– 18 –
7-1. BLOCK DIAGRAM – CD MECHANISM DECK Section –
PD1 I-V AMP
PD1
38
PD2 I-V AMP
PD2
39
AUTOMATIC
POWER CONTROL
Q101
F
41
E
42
LD
36
RF
+
SUMMING
AMP
RF AMP,
FOCUS/TRACKING
SERVO
IC101 (1/2)
I-V
AMP
LD
AMP
PD
AMP
FOCUS
ERROR
AMP
TRACKING
ERROR
AMP
DETECTOR
A
D
B
C
F
E
OPTICAL PICK-UP
(KSS-213D/Q-NP)
LASER DIODE
PD
4
5
1
2
I-V AMP
10
6
LD
PD
37
RFO
33
RFI
32
FOCUS OK
COMPARATOR
MIRR
AMP
DEFECT
AMP
FEO
FE BIAS
TEO
HCD-GRX5/RX66
DIGITAL SIGNAL PROCESSOR,
CLV SERVO PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
FOK
DATA
CLK
XLT
LOCK
XRST
SENS1
C.OUT
SENS2
FEO
TAO
27
22
20
21
19
23
25
24
26
6
13
73
FOCUS OK
AMP
TTL
IIL
1
40
45
FEI
2
TEI
47
TTL
IIL
IIL
IIL DATA REGISTER
TTL
FOCUS PHASE
COMPENSATION
TRACKING PHASE
COMPENSATION
IC103
RF
ASYI
ASYO
FOK
DATO
CLKO
XLTO
SEIN
CNIN
ASYMMETRY
CORRECTION
XRST
100
57
XRST
SQ-DATA-IN
CD-DATA
SERVO AUTO SEQUENCER
SYSTEM CONTROLLER
SENS
CD-CLK
XLT
SCOR
44
46
47
23
15
17
16
13
14
SQ-CLK (D-OUT ON/OFF)
SENS2
DIGITAL CLV
MON
26
IC501 (1/3)
34
36
74
47
48
58
18
FILTER
39
42
FILO
CLTV
DIGITAL PLL
XROF
MDS29LOCK64SQSO
MDP
28
27
PCO
4038
FILI
SQCK
8 7
EFM
DEMODULATOR
SUB-CODE
PROCESSOR
CPU INTERFACE
SENS
XLAT
CLOK
DATA
91012
117576
INTERNAL BUS
ERROR
CORRECTOR
CKO
SPOD
SCOR
SBSO
EXCK
77
6
21
S101
(LIMIT)
ON : When the optical pick-up
is inner position.
D/A
16K
RAM
TIMING
LOGIC
XTAI
89
16.9344MHz
INTERFACE
DIGITAL
90
X101
PCMD
52
BCK
54
LRCK
50
C2PO
63
RFCK
62
WDCK
49
DOUT
OUT
EMPH
WFCK
GTOP
CLOCK
GENERATOR
XTAO70C4M
GFS
PCMDI
53
55
51
71
72
61
74
58
BCKI
LRCKI
SERIAL
INPUT
INTERFACE
EMPHI
73
OVER
SAMPLING
DIGITAL
FILTER
NOISE
SHAPER
PWM &
INTEGRATOR
AOUT1
AOUT2
84 95
85
94
AIN1
AIN2
BUFFER
LOUT2
LOUT1
86
93
R-CH
CD-L
A
(Page 23)
OPTICAL
TRANSCEIVER
IC381
IC381
CD DIGITAL
OUT
OPTICAL
LEVEL SHIFT
Q701
4
ROTARY
2
ENCODER
S811
3
DISC TRAY SLIDE MOTOR DRIVE
FIN
10
RIN
2
TBL-SENS
ENC1
ENC2
ENC3
LOAD-IN
75
76
81
80
79
78
63
64
DISC-SENS
9
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
05
M102
M
(SLED)
M101
(SPINDLE)
M
OUT4A
16
OUT4B
15
OUT3A
18
OUT3B
17
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
OUT2A
11
OUT2B
12
OUT1A
13
OUT1B
14
MUTE
TRACKING
COIL DRIVE
FOCUS
COIL DRIVE
IC102
SLED
MOTOR DRIVE
SPINDLE
MOTOR DRIVE
IN4A
IN3B
IN2A
IN1B
27
OP
26
6
3
24
16
OUT
SLO
SLED SERVO
BUFFER
SLED
AMP
IC101 (2/2)
OP+,
OP–
SLP
22, 23
14
OUT-OPEN
LOAD-OUT
DISC SENSOR
IC703
DISC TRAY SENSOR
IC702
S801
(OPEN/CLOSE DET)
CLOSE
OPEN
IC801
OUT1
MOTOR
OUT2
DRIVE
7
4
M
(DISC TRAY SLIDE)
M801
• SIGNAL PATH
: CD PLAY
TBL-L
TBL-R
DISC TRAY TURN MOTOR DRIVE
60
61
IC701
MOTOR
DRIVE
OUT1
OUT2
7
2
M
(DISC TRAY TURN)
M701
IN1
3
IN2
6
: DIGITAL OUT
– 19 – – 20 –
HCD-GRX5/RX66
7-2. BLOCK DIAGRAM – TAPE DECK Section –
HRP1
(PLAYBACK)
L-CH
R-CH R-CH
HRP2 (1/2)
(RECORD/PLAYBACK)
L-CH
R-CH R-CH
3
R-CH
PB EQ AMP
(DECK A)
IC611
PB EQ AMP
(DECK B)
IC601
REC/PB SWITCHING
IC602
1
R-CH
RV311
PB LEVEL (L)
(DECK A)
RV301
PB LEVEL (L)
(DECK B)
4
DECK PROCESS
DECK A/B SELECT, PB/REC EQ AMP,
DOLBY NR AMP, ALC, AMS
AIN (L)
48
BIN (L)
46
BIAS (N)
33
BIAS (C)
32
BIAS (M)
31
A 120/70
19
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
IC301
BIAS
CONTROL
CIRCUIT
B NORM/CROM
ALC ON/OFF
NORM/HIGH
PB A/B
1516182022 23242517
70
120
R-CH
NR ON/OFF
BIAS ON/OFF
RM ON/OFF
L.P.F.
BUFFER
AMS
CIRCUIT
REC/PB/PASS
LM ON/OFF
+
28
27
26
MAOUT
MSIN
MSOUT
RIN (L)
43
ALC (L)
44
DOLBY PASS
ALC
ROUT (L)
35 34
DOLBY NR
AMP
CIRCUIT
ALC
IN (L)
REC OUT (L)
39
RV301
REC LEVEL (L)
(DECK B)
EQ IN (L)
38
REC
EQ AMP
PB OUT (L)
EQ OUT
• SIGNAL PATH
: PLAYBACK (DECK A)
40
(L)
36
PB-L
REC-L
B
(Page 23)
C
(Page 24)
: PLAYBACK (DECK B)
: RECORD
RV441
REC BIAS (R)
(DECK B)
HRP2 (2/2)
(ERASE)
R-CH
2
RV341
REC BIAS (L)
(DECK B)
BIAS OSC
T621
BIAS OSC
Q621, 622
REC BIAS
SWITCH
Q623
05
C331, L331
BIAS
TRAP
B+
(A+7V)
97
TC-RELAY
A-PLAY-SW
95 96
S1001
(DECK A PLAY)
9994939290 898887
BIAS
PB-A/B
EQ-H/N
REC-MUTE
ALC-ON/OFF
S1002
(DECK B PLAY)
NR-ON/OFF
B-PLAY-SW
S1003
(DECK A HALF)
TC-MUTE
R/P-PASS
31
AMS-IN
A-HALF
98
ROTATION
DETECT SENSOR
(DECK A)
IC1001
S1006
(DECK B HALF)
S1009
(DECK B REC)
26
A-SHUT
B-HALF
28
ROTATION
DETECT SENSOR
(DECK B)
IC1002
27
B-SHUT
S1005
(DECK A REC)
SL1
TRIGGER PLUNGER
DECK A
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333, 334
84
SYSTEM CONTROLLER
IC501 (2/3)
A-TRG
SL2
TRIGGER PLUNGER
DECK B
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331, 332
83
B-TRG
Q335
82
CAP-M-H/L
RV1001
TAPE SPEED
(HIGH)
CAPM-CNT1P
CAPM-CNT2P
CAPM-CNT1M
CAPM-CNT2M
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
17
MOTOR DRIVE
77
85
MOTOR DRIVE
86
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN
Q336 – 339
CAPSTAN
Q340 – 343
M
M1
(CAPSTAN)
– 21 –
– 22 –
7-3. BLOCK DIAGRAM – MAIN Section –
HCD-GRX5/RX66
FM 75Ω
AM
J751
MIX MIC
(Page 20)
(Page 22)
L
R
J101 (1/2)
MD/VIDEO
(AUDIO) IN
ANTENNA
A
B
CD-L
PB-L
R-CH
FM/AM TUNER UNIT
FM ANT
FM ANT
AM ANT
ST-MUTE
STEREO
AM ANT
TUNED
ST-DIN
ST-DOUT
ST-CLK
ST-CE
MIC AMP
IC750 (1/2)
ST-L
ST-R
R-CH
RV750
MIC LEVEL
68
67
69
66
MIC AMP
IC750 (2/2)
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IN B2
IN C2
INPUT
IN A2
SELECT
IN D2
R-CH
CPU
INTERFACE
LATCH
DATA
CLOCK
33 32
34
IC101
SOUND
CONTROL
CIRCUIT
COMMAND
KEY IN2
KEY IN1
60 5
(Page 25)
(Page 25)
(Page 26)
(Page 26)
KEY OUT
75
(Page 22)
REC-L
C
J101 (2/2)
L
MD/VIDEO
R-CH
R-CH
LINE AMP
IC191
BASS BOOST
CONTROL
CIRCUIT
BB B2,
BB A2
38, 39
BUF
OUT2
36
FEED BACK SWITCH
Q112
MUTING
Q191
MUTING
Q113
R-CH
POWER AMP
MUTING CONTROL
D141
2
MIC IN
+
+
REC
A2
+
58
EQUALIZER
CONTROL
R-CH
GRAPHIC
CIRCUIT
REC
B2
57
F OUT2
VOL
42
IN2
41
CONTROL
40
VOL OUT2
VOLUME
+
SPEANA
MIXING AMP
IC102
SPEANA
D
DBFB CONTROL
R-CH
SWITCH
Q111
R-CH
R
SUPER WOOFER
IC801
SWITCH
Q575
(AUDIO) OUT
J191
OVER LOAD
+
R-CH
+
DATA, CLK
F
POWER
G
CD-POWER
H
R-CH
DETECT
Q801
+
R-CH
DC DETECT
Q433, 434
R-CH
SWITCH
• SIGNAL PATH
: CD PLAY
: TAPE PLAY
: RECORD
: TUNER (FM/AM)
: MIC INPUT
-1
-2
RELAY
DRIVE
Q431
OVER LOAD
DETECT SWITCH
Q432, 437
D843
RESET SIGNAL
GENERATOR
+5V
IC502
RY401
PROTECTOR
Q435, 436
J421
PHONES
+
–
+
–
TM401
SPEAKER
IMPEDANCE
USE 6 – 16Ω
L
R
RESET
RESET
E
(Page 25)
6
F-RELAY
MUTING CONTROL
SWITCH
X501
CLK
DATA
52 51
ST-MUTE
M62442-DATA
3
M62442-CLK
M62442-LATCH
46 5
CD-POWER
POWER
5655
IIC-CLK
IIC-DATA
SYSTEM CONTROLLER
IC501 (3/3)
2
DBFB-H/L
68
67
69
ST-DIN
ST-DOUT
70
TUNED
72
STEREO
66
65
ST-CE
ST-CLK
05
5MHz
10
11
X2
X502
32.768kHz
14
13
X1
XT2
100
XT1
STK-MUTE
– 23 –
Q571, 572
– 24 –
1
16
LINE-MUTE
AC-CUT
RESET
SWITCH
Q501
15
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