Sony HCDRXD-7 Service manual

HCD-GRX50/R770/RXD7
SERVICE MANUAL
HCD-GRX50/R770/RXD7 are the Ampli­fier, CD player, Tape Deck and Tuner section in HMC-GRX50/R770/RXD7.
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-GRX50
CD Section
Tape deck Section
Canadian Model
HCD-RXD7
AEP Model
HCD-R770/RXD7
UK Model
HCD-R770
E Model
Australian Model
HCD-GRX50
Model Name Using Similar Mechanism NEW CD Mechanism Type CDM38LH-5BD32L Base Unit Name BU-5BD32L Optical Pick-up Name KSS-213D/Q-NP Model Name Using Similar Mechanism NEW Tape Transport Mechanism Type TCM-230AWR2
Amplifier section
Canadian model: Continuous RMS power output (reference)
70 + 70 watts (6 ohms at 1 kHz, 10% THD)
Total harmonic distortion less than 0.07%
(6 ohms at 1 kHz, 45 W)
European and Russian models: DIN power output (rated) 80 + 80 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
100 + 100 watts (8 ohms at 1 kHz, 10% THD)
Music power output (reference)
170 + 170 watts (6 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) 110 + 110 watts
(8 ohms at 1 kHz, DIN)
Continuous RMS power output (reference)
140 + 140 watts (8 ohms at 1 kHz, 10% THD)
– Continued on next page –
MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
Specifications (continued)
Inputs MD/VIDEO (AUDIO) IN: voltage 450 mV/250mV, (phono jacks) impedance 47 kilohms MIX MIC: (phone jack) sensitivity 1 mV, impedance 10
kilohms
Outputs MD OUT: voltage 250 mV, (phono jacks) impedance 1 kilohms PHONES: accepts headphones of 8 ohms (stereo phone jack) or more SPEAKER: Canadian model: accepts impedance of 6 to 16 ohms Other models: accepts impedance of 8 to 16 ohms SUPER WOOFER (GRX50/RXD7: Canadian models):
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
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
3 Band type: Middle Eastern models: MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz) Other models: MW: 531 - 1,602 kHz
(with the interval set at 9 kHz)
530 - 1,710 kHz
(with the interval set at 10 kHz) SW: 5.95 - 17.90 MHz
(with the interval set at 5 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz
General
Power requirements Canadian model: 120 V AC, 60 Hz European and Russian models: 230 V AC, 50/60 Hz Mexican model: 120 V AC, 50/60 Hz Australian model: 230 - 240 V AC, 50/60 Hz Israel and Thai 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 Canadian model: 130 watts European and Russian models: 165 watts Other models: 160 watts
Dimensions (w/h/d) Approx. 280 × 340 × 395 mm
(111/8 × 131/2 × 155/8 in.)
Mass Canadian model: Approx. 9.2 kg European and Russian models: Approx. 10.1 kg Other models: Approx. 10 kg Supplied accessories: AM loop antenna (1)
Remote Commander (1)
Batteries (2)
FM lead antenna (1)
Speaker cords (2)
Front speaker pads (8)
Design and specifications are subject to change without notice.
UKV tuner section (3 band (FM-AM-UKV) models only)
Tuning range 65.0 - 74.0 MHz
Stereo Plus
AM tuner section
Tuning range 2 Band type: Canadian model: 530 - 1,710 kHz
(with the interval set at 10 kHz) 531 - 1,710 kHz (with the interval set at 9 kHz)
European and Russian 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)
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIA GRAMS 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.
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.
– 2 –
TABLE OF CONTENTS
SECTION 1

SERVICING NOTES

1. SERVICING NOTES ............................................... 3
2. GENERAL
Location of Controls ....................................................... 6
Setting the Time .............................................................. 7
3. DISASSEMBLY ......................................................... 8
4. TEST MODE.............................................................. 11
5. MECHANICAL ADJUSTMENTS....................... 14
6. ELECTRICAL ADJUSTMENTS
DECK Section ................................................................. 14
CD Section ...................................................................... 17
7. DIAGRAMS
7-1. Block Diagram – CD SERVO 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. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 27
7-6. Printed Wiring Board – BD Board – .............................. 29
7-7. Schematic Diagram – BD Board – ................................ 31
7-8. Printed Wiring Boards – CD MOTOR Section – .......... 33
7-9. Schematic Diagram – CD MOTOR Section – .............. 35
7-10. Printed Wiring Board – AUDIO Board – ...................... 37
7-11. Schematic Diagram – AUDIO Board – ......................... 39
7-12. Printed Wiring Board – LEAF SW Board – .................. 41
7-13. Schematic Diagram – LEAF SW Board –..................... 41
7-14. Printed Wiring Board – MAIN Board – ........................ 43
7-15. Schematic Diagram – MAIN Board (1/4) –................. 45
7-16. Schematic Diagram – MAIN Board (2/4) –.................. 47
7-17. Schematic Diagram – MAIN Board (3/4) –.................. 49
7-18. Schematic Diagram – MAIN Board (4/4) –.................. 51
7-19. Printed Wiring Board – PANEL Board – ...................... 53
7-20. Schematic Diagram – PANEL Board – ......................... 55
7-21. Printed Wiring Board – CD SW Board – ...................... 57
7-22. Schematic Diagram – CD SW Board –......................... 58
7-23. Printed Wiring Boards
– TRANSFORMER Section – ........................................ 61
7-24. Schematic Diagram
– TRANSFORMER Section – ........................................ 63
7-25. IC Pin Function Description ........................................... 67
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.
8. EXPLODED VIEWS................................................ 73
9. ELECTRICAL PARTS LIST ............................... 82
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
INTERLOCKS 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!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALT-
TIINA 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 LÉZERSU-
GÁRVESZÉLY
!
KERÜLJE A BESUGÁRZÁST!
– 3 –
MODEL IDENTIFICATION – Rear Panel –
PART No.
MODEL PART No.
Argentine model 4-214-442-0π Israel and Thai models 4-214-442-6π 120 V AC Area in E model 4-215-168-0π Canadian model 4-215-168-1π R770: AEP, UK, German and
North European models RXD7: CIS model 4-215-168-3π R770: CIS model 4-215-168-4π RXD7: AEP, German and
North European models 240 V AC Area in E model 4-215-168-6π Saudi Arabia model 4-215-168-7π Singapore model 4-215-168-8π Mexican model 4-215-168-9π Australian model 4-220-083-0π Taiwan model 4-220-083-1π Korean model 4-220-083-2π
4-215-168-2π
4-215-168-5π
– 4 –
HOW TO OPEN THE DISC TRAY WHEN POWER SWITCH TURNS OFF.
1
Remove the Case.
3
Pull-out the disc tray.
2
Turn the cam to the direction of arrow.
e
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 CONTOROLS – Front Panel –
SECTION 2

GENERAL

This section is extracted from instruction manual.
– Rear Panel –
123
4
5
6
7
8
1 CD DIGITAL OUT terminal 2 VIDEO (AUDIO) IN jack 3 FM COAXIAL ANTENNA terminal
(R770/RXD7: AEP models) FM ANTENNA terminal
(GRX50/RXD7: Canadian models)
4 MD IN/OUT jack 5 SUPER WOOFER jack
(GRX50/RXD7: Canadian models)
6 SPEAKER terminal 7 AM ANTENN A terminal 8 VOLTAGE SELECTOR switch
(GRX50: 120 V AC Area in E, 240 V AC Area in E, Saudi Arabia, Singapore, Taiwan, Argentine models)
– 6 –
– 7 –
SECTION 3

DISASSEMBLY

Note: Follow the disassembly procedure in the numerical order given.
CASE
2
3
two screws (case 3TP2) (3
screw (case 3TP2) (3
×
8)
×
12)
6
case
4
5
4
1
three screws (BVTP3
2
screw (case 3TP2) (3
3
two screws (case 3TP2) (3
×
8)
×
12)
×
8)
LOADING PANEL ASS’Y
A
1
Turn the cam-in the direction of the arrow
A
2
.
Pull-out the disc tray.
3
loading panel ass’y
– 8 –
FRONT PANEL SECTION
)
6
screw (BVTT3
×
10)
9
front panel section
4
screw (BVTT2.6
3
wire (flat type) (15 core) (CN303)
5
×
5)
6
screw (BVTP3
lug
×
10)
2
wire (flat type) (23 core) (CN501)
5
lug
4
screw (BVTT2.6
×
5
7
three screws (BVTT3
×
6)
CD MECHANISM DECK SECTION (CDM38LH-5BD32L)
3
Remove the CD mechanism deck (CDM38LH-5BD32L) in the direction of arrows
A
– B.
B
1
screw (BVTP3
×
10)
1
wire (flat type) (17 core) (CN304)
A
2
two screws (BVTP3
×
8)
– 9 –
1
4
screw (BVTP3
5
wire (flat type) (19 core) (CN391)
two connectors (CN392, 393)
×
10)
TAPE MECHANISM DECK SECTION (TCM-230AWR2)
)
2
Open two cassette lids.
1
Push the cassette lid.
3
three screws (BVTP2.6
×
8)
3
two screws (BVTP2.6
4
tape mechanism deck section (TCM-230AWR2)
×
8)
MAIN BOARD
2
connector (CN952)
1
Push the cassette lid.
3
connector (CN953) (GRX50)
4
two screws (BVTP3
1
wire (flat type)
13 core: EXCEPT AEP, UK, Singapore, Taiwan
(
15 core: AEP, UK, Singapore, Taiwan
(CN371)
6
five screws (BVTP3
×
8)
×
8)
7
Remove the MAIN board in the direction of the arrow.
5
two screws (BVTP3
×
8)
– 10 –
8
connector (CN403) (EXCEPT Canadian)
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. Turn the power ON or set to the DEMO mode.
2. Press three buttons of p , [ENTER/NEXT], and 1/u simulta-
neously.
3. The set is reset, and displays “COLD RESET”, then becomes
DEMO mode.
[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. Turn the power ON or set to the DEMO mode.
2. Press three buttons of p , [ENTER/NEXT], and [DISC1] si-
multaneously.
3. The set is reset, and becomes standby state.
[Change-over the AM Tuning Interval] (EXCEPT AEP, UK, and Saudi Arabia models)
• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the 1/u button to turn the power ON.
2. Select the function “TUNER”, and press the [TUNER/BAND]
button to select the BAND “AM”.
3. Press the 1/u button to turn the power OFF.
4. Press the [ENTER/NEXT] and 1/u buttons simultaneously,
and the display on the fluorescent indicator tube changes to “AM 9 k STEP” or “AM 10 k STEP”, and thus the tuning interval is changed over.
[CD Service Mode]
• This mode can run the CD sled motor optionally. Use this mode, for instance, when cleaning the optical pick-up.
Procedure:
1. Press the 1/
2. Select the function “CD”.
3. Press three buttons of p , [ENTER/NEXT], and § simulta-
neously.
4. Set to the Sled Servo mode.
5. With the CD in stop status, turn the JOG dial clockwise to
move the optical pick-up to outside track, or turn it counter­clockwise to inside track.
6. To exit from this mode, perform as follows.
1) Move the optical pick-up to the most inside track.
2) Disconnect the power cord.
Notes: • Always move the optical pick-up to most inside track when
u button to turn the power ON.
exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
[CD Delivery Mode]
• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press the 1/
2. Press the [LOOP] and 1/u buttons simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator
tube, and the CD delivery mode is set.
[LED and Fluorescent Indicator Tube All Lit, Key Check Mode]
Procedure:
1. Press three buttons of p , [ENTER/NEXT], and [DISC2] si-
multaneously.
2. LEDs and fluorescent indicator tube are all turned on.
Press the [DISC2] button, and the key check mode is acti­vated.
3. In the key check mode, the fluorescent indicator tube displays
“K 0 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 turn the JOG dial clock­wise, or it decreases like 0, 9, 8 ... if turn the JOG dial counter­clockwise. “V” value increases like 1, 2, 3 ... if turn the [VOLUME] dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.
4. To exit from this mode, press three buttons in the same man-
ner as step 1, or disconnect the power cord.
u button to turn the power ON.
– 11 –
[Aging Mode]
This mode can be used for operation check of CD section and tape deck section. CD section and tape deck section work in parallel.
• If an error occurred: The aging operation stops only an error occurred sections and display then status.
• If no error occurs: The aging operation continues repeatedly.
Procedure:
1. Set disc in DISC1 tray.
2. Load the tapes into the decks A and B respectively.
3. Press the [PLAYMODE] button to set the “ ALL DISCS” mode,
and press the [REPEAT] button to “REPEAT” off.
4. Press the [FUNCTION] button to select the function “CD”.
5. Press three buttons of p , [ENTER/NEXT], and [DISCSKIP/
EX-CHANGE] simultaneously.
6. The aging mode is activated, if the indicator of disc tray num-
ber on the fluorescent indicator tube is blinking.
7. To exit from the aging mode, press the 1/u button to turn the
power OFF and operate the cold reset. (Refer to the “MC Cold Reset”)
• Display at an error occurred
1) Display of the error count (1) Press three buttons of p , [ENTER/NEXT], and [CDSYNC]
simultaneously.
(2) Display of the error count following as below.
Display
EMC**EDC
Notes:
EMC**: The number of mechanical error. EDC**: The number of no disc error after chucking the disc.
**
2) Display of mechanical error
Display
E**M##$$&&
1. Display at the Aging Mode
• Display operating state of CD section and tape deck section al­ternately.
• If an error occurred, stop display which that section.
2. CD Section
• Display at the aging mode is the same as the normal operation.
• The sequence during the aging mode is following as below.
Aging mode sequence (CD section) :
Tur n the disc tray
Disc1 chucking
TOC read
Play track1 for 2 seconds
Play last track for 2 seconds
Notes:
: The number of mechanical error.(“00” is latest one)
**
(Press the [PLAYMODE] button to changes next error display) ## : Not used. $$ : Loading error. (Second figure is not used)
D: The error in the midst of close at the except mechanical trouble. E : The error in the midst of open at the except mechanical trouble. C : The error in the midst of chuck up at the except mechanical
trouble.
F : The error in the midst of EX-open at the except mechanical
&&: Loading error. (Second figure in not used)
trouble.
1:The error in the midst of chuck up. 2:The error in the midst of chuck down. 3:Time up of EX-open 4:Time up of EX-close.
3) Display of no disc error
Display
E**D##$$&&
Notes:
: The number of mechanical error.(“00” is latest one)
**
(Press the [REPEAT] button to changes next error display) ##:
01:Focus error 02:GFS error 03:Set up error
$$:
00:No disc error when does not chucking retry. 02:No disc error when chucking retry to completion.
&&: The state when judged no disc error. (Second figure is not used)
1: Stop 2: Set up 3: TOC read 4: Access 5: Play 6: Pause 7: Manual search (Play) 8: Manual search (Pause)
– 12 –
3. Tape Deck Section
• The sequence during the aging mode is following as below.
• If an error occurred, stop display that step.
Aging mode sequence (Tape deck section) :
Rewind the tape A and B
“TAPE A AG-1”
Shut off
FWD play the tape A
“TAPE A AG-2”
2 minutes
Fast forward the tape A
“TAPE A AG-3”
Shut off or 20 seconds
REV play the tape A
“TAPE A AG-4”
2 minutes
Rewind the tape A
“TAPE A AG-5”
Shut off
FWD play the tape B
“TAPE B AG-2”
2 minutes
Fast forward the tape B
“TAPE B AG-3”
Shut off or 20 seconds
REV play the tape B
“TAPE A AG-4”
2 minutes
Rewind the tape B
“TAPE B AG-5”
Shut off
Note: “TAPE * AG-*” is display of each step.
– 13 –
SECTION 5
r

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
(0.03 – 0.08 oz • inch)
31 to 71 g • cm
(0.43 – 0.98 oz • inch)
2 to 6 g • cm
(0.03 – 0.08 oz • inch)
71 to 143 g • cm
(0.99 – 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.
8. Set to the DOLBY NR OFF.
9. Set to the test mode. (1) Press the 1/u button to turn the power ON. (2) Select the function “TAPE A or B”. (3) Press the button of p , [ENTER/NEXT], and [DISC3]
simultaneously, to set the tape deck test mode and blink the indicator of disc tray number on the fluorescent indi­cator tube.
(4) To exit from the test mode, press the 1/u 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
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 MD OUT jack (J101) L-CH, R-CH
set
level mete
+ –
– 14 –
2. T urn 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.
Tape Speed Adjustment
Mode: Playback
test tape WS-48B (3 kHz, 0 dB)
DECK B
frequency counter
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
main board test tape P-4-A100 (10 kHz, –10 dB)
L-CH
MAIN board CN301 set
R-CH
in phase 45°90°135°180
MD OUT jack (J101)
L-CH
R-CH
waveform of oscilloscope
good
oscilloscope
wrong
H
V
°
4. Repeat step 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the pats adjusted.
set
main board MD OUT jack (J101) L-CH, R-CH
+ –
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 Sample value of Wow and Flutter: 0.3% or less W.RMS (JIS)
(WS-48B)
Playback level Adjustment DECK A DECK B
Procedure:
Mode: Playback
test tape P-4-L300 (315 Hz, 0 dB)
set
main board MD OUT jack (J101) L-CH, R-CH
level meter
+
Adjustment Location:Playback Head (Deck A).
Record/Playback/Erase Head (Deck B).
forward
reverse
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:
J101 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
– 15 –
REC Bias Adjustment DECK B
Procedure:
1. Mode: Record FUNCTION: VIDEO
main board VIDEO (AUDIO) IN jack (J101) L-CH, R-CH
50 mV (–23.8 dB)
 
600
AF OSC
1) 315 Hz
2) 10 kHz
attenuator
2. Mode: Playback
set
blank tape CN-123
Specification values:
J101 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
– MAIN BOARD (Conductor Side)
RV301
L
IC301
RV351
R
REC LEVEL
VIDEO (AUDIO) IN
J101
MD OUT
(L/R)
(L/R)
recorded portion
set
main board MD OUT jack (J101) L-CH, R-CH
level meter
+ –
3. Confirm playback the signal recorded in step 1 become speci­fication values as follows. If these values are out of specification values, adjust the R V341 (L-CH) and RV441 (R-CH) on the AUDIO board to repeat steps 1and 2.
Specification values: Playback output of 315 Hz to playback
output of 10 kHz: ± 0.5 dB
Adjustment Location: AUDIO board
REC Level Adjustment DECK B
Procedure:
1. Mode: Record FUNCTION: VIDEO
main board VIDEO (AUDIO) IN jack (J101) L-CH, R-CH
AF OSC
315 Hz, 50 mV (–23.8 dB)
attenuator
600
blank tape CS-123
set
– AUDIO BOARD (Component Side)
RV441
RV401
RV301
LR
PB LEVEL
– DECK B –
– LEAF SW BOARD (Component Side)
TAPE SPEED
(NORMAL) (HIGH)
RV1002

REC BIAS
RV1001
IC602
RL


CN601
RV341
CN1001
RV311
LR
PB LEVEL
– DECK A –
RV411

2. Mode: Playback
recorded portion
set
main board MD OUT jack (J101) L-CH, R-CH
level meter
+ –
3. Confirm playback the signal recorded in step 1 become speci­fication values as follows. If these values are out of specification values, adjust the R V301 (L-CH) and R V351 (R-CH) on the MAIN board to repeat steps 1 and 2.
– 16 –
CD SECTION
V
+ –
BD board
TP (TE) TP (VC)
oscilloscope
)
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 M 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
BD board
TP (FE) TP (VC)
+ –
E-F Balance (1 Track Jump) Check
Procedure :
1. Connect oscilloscpe to TP (TE) and TP (VC).
2. Turn the power ON.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the ^ (CD) button. (Becomes the 1 track jump mode)
5. Confirm that the level B and A (DC voltage) on the oscillo­scope waveform.
Procedure:
1. Connect oscilloscope to TP (FE).
2. Connect between TP (FE1) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn the power ON.
5. Load a disc (YEDS-18) and actuate the focus search. (In con­sequence of open and close the disc tray, actuate the focus search)
6. Cofirm that the oscilloscope waveform (S-curve) is symmetri­cal between A and B. And confirm peak to peak level within 4 ± 1 Vp-p.
S-curve waveform
symmetry
A
B
within 4
±
1 Vp-p
7. After check, remove the lead wire connected in step 2 and 3.
Note: • Try to measure several times to mak e sure than the ratio of A : B
or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the brightness to obtain best waveform.
RF Level Check
oscilloscope
BD board
1 track jump waveform
B
0V
level = 1.3
Specified level: × 100 = less than ± 22%
±
0.6 Vp-p symmetry
A B
A (DC voltage
6. After check, remove the lead wire connected in step 1.
center of waveform
TP (RF) TP (VC)
+ –
Procedure:
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turn the power ON.
4. Load a disc (YEDS-18) and playback.
5. Confirm that the oscilloscope waveform is clear and check RF signal level is correct or not.
6. After check, remove the lead wire connected in step 2.
Note: Clear RF signal waveform means that the shape “” can be clearly
distinguished at the center of the waveform.
VOLT/DIV: 200 m TIME/DIV: 500 ns
level:
±
0.3 Vp-p
1.45
– 17 –
Checking Location:
– BD BOARD (Side B) –
TP (VC)
TP (RF)
IC103
IC102
TP (TE)
TP (GND)
TP
(AGCCON)
TP (FE)
TP (FE1)
– 18 –
SECTION 7

DIAGRAMS

7-1. BLOCK DIAGRAM – CD SERVO Section –
RF AMP,
DETECTOR
A
B
C
D
F
E
OPTICAL PICK-UP (KSS-213D/Q-NP)
LASER DIODE
PD
7
4
2
1
5
I-V AMP
10
6
LD
CD D+5V
10
11
AUTOMATIC
POWER
CONTROL
Q101
FOCUS/TRACKING ERROR AMP
A
5
B
6
C
7
D
8
F
F I-V AMP
E
E I-V AMP
3
IC103
RF
SUMMING
AMP
LD
APC LD
AMP
RF EQ
FOCUS
ERROR AMP
TRACKING
ERROR AMP
APC PD
AMP
AMP
HOLD SW
RFO
LDON
HCD-GRX50/R770/RXD7
FILTER
53
54 56
FILO
PCO
CLTV
RFAC
ASYI ASYO
DIGITAL
CLV
MDP
26
ASYMMETRY CORRECTION
XRST
3
16
FE
14
TE
13
21
22
PD
4
51
49 48
DIGITAL
SUBCODE
PROCESSOR
XLON
XLAT
DATA
14 5 6
PLL
CPU INTERFACE
CLOK
SENS
8
7
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
55
FILI
EFM
DEMODULATOR
SERVO AUTO
SEQUENCER
SQSO
SCOR
20
1 2
16K
RAM
SQCK
IC101 (1/2)
CORRECTOR
SERVO
INTERFACE
SCLK
COUT
9 21
D/A
INTERFACE
INTERNAL BUS
ERROR
SSTP
EMPH
WFCK
GFS
64 15
27
ON :
18
S101
(LIMIT)
When the optical pick-up is inner position.
PCMD
BCK LRCK C2PO
SERIAL
IN
INTERFACE
DIGITAL
62 63 61 19
OUT
DOUT
60
DIGITAL
FILTER,
NOISE SHAPER
TO MIRR/DFCT/ FOK DETECTOR
PWM
&
INTEGRATOR
AOUT1
AOUT2
70
77
CLOCK
GENERATOR
X101
CD DIGITALOUT
OPTICAL OPTICAL
TRANSCEIVER
CD-L
IC381
IC381
A
(Page 23)
BUFFER
TIMING
LOGIC
LOUT1
LOUT2
XTAI
XTAO
72
75
R-CH
66 67
16.9344MHz
AIN1
71
AIN2
76
(TRACKING)
(FOCUS)
05
2-AXIS
DEVICE
M101
(SPINDLE)
M102
(SLED)
FOCUS/TRACKING COIL DRIVE, SPINDLE/SLED MOTOR DRIVE
CH4OUTF
15
M
M
16
17 18
12 11
14 13
CH4OUTR
CH3OUTF CH3OUTR
CH2OUTF CH2OUTR
CH1OUTF CH1OUTR
IC102
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
COIL
DRIVE
CH4SIN
CH3FIN
CH3RIN
CH2FIN
CH2RIN
CH1FIN
CH1RIN
MUTE
25
43
39
40
41
FE
TE
SE
24 23
SFDR
28
SRDR
29
5 6
2 3
20
TFDR
30
TRDR
31
FFDR
32 33
FRDR
FOCUS/TRACKING/SLED
RFDC
A/D
CONVERTER
PWM GENERATOR
SERVO DSP
FOCUS/TRACKING/SLED
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
MIRR/DFCT/
FOK
DETECTOR
TO SERVO INTERFACE
FOK
MIRR
DFCT
24 22 23
33
SQ-CLK
32
SQ-DATA
19
SCOR
56
SENSE
37
CD-CLK
58
XLT CD-DATA
35
HOLD
57
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (1/4)
59
XRST
DISC-SENS
TBL-SENS
OUT-OPEN
ENC1 ENC2 ENC3
LOAD-OUT
LOAD-IN
TBL-L TBL-R
60
61
71
69 68
66 67
63 65
LEVEL SHIFT
Q701
(OPEN/CLOSE DET)
470
ROTARY
2
ENCODER
S811
3
DISC TRAY SLIDE MOTOR DRIVE
FIN
10
RIN
2
DISC TRAY TURN MOTOR DRIVE
IN1
3
IN2
6
DISC TRAY SENSOR
S801
CLOSE
OPEN
IC801
MOTOR
DRIVE
IC701
MOTOR
DRIVE
DISC IN DETECT
SENSOR
IC703
IC702
DISC TRAY
ADDRESS DETECT
OUT1
7
OUT2
4
OUT1
7
OUT2
2
M
(DISC TRAY SLIDE)
M
(DISC TRAY TURN)
M801
M701
– 19 – – 20 –
SIGNAL PATH : CD PLAY (ANALOG OUT) : CD PLAY (DIGITAL OUT)
HCD-GRX50/R770/RXD7
7-2. BLOCK DIAGRAM – TAPE DECK Section –
HP101
(PLAYBACK)
L-CH
R-CH R-CH
HRPE101 (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 31
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
BIAS (M)
CONTROL
B NORM/CROM
A 120/70
19
IC301
BIAS
CIRCUIT
ALC ON/OFF
1516182022 23242517
NORM/HIGH
PB A/B
70
120
R-CH
NR ON/OFF
BIAS ON/OFF
RM ON/OFF
L.P.F.
BUFFER
28
27
AMS
CIRCUIT
REC/PB/PASS
LM ON/OFF
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)
HRPE101 (2/2)
(ERASE)
R-CH
05
2
RV341
REC BIAS (L)
(DECK B)
BIAS OSC
T621
BIAS OSC
Q621, 622
REC BIAS
SWITCH
Q623
C331, L331
BIAS
TRAP
B+
(A+7V)
D+5V
100
TC-RELAY
8584838281 807978
A-PLAY-SW
87
S1001
(DECK A PLAY)
PB-A/B
EQ-H/N
ALC-ON/OFF
S1002
(DECK B PLAY)
BIAS
REC-MUTE
B-PLAY-SW
86
TC-MUTE
R/P-PASS
NR-ON/OFF
(DECK A HALF)
S1003
77
AMS-IN
88
DETECT SENSOR
A-HALF
(DECK B HALF)
(DECK A REC)
(DECK B REC)
ROTATION
(DECK A)
IC1001
91
A-SHUT
S1006
S1005
S1009
ROTATION
DETECT SENSOR
(DECK B)
IC1002
90
B-SHUT
SYSTEM CONTROLLER
B-HALF
89
IC501 (2/4)
TRIGGER PLUNGER
DECK A
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333, 334
73
A-TRG
TRIGGER PLUNGER
DECK B
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331, 332
72
B-TRG
Q335
76
CAP-M-H/L
RV1001
TAPE SPEED
(HIGH)
CAPM-CNT1 CAPM-CNT2
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
75
MOTOR DRIVE
74
RV1002
TAPE SPEED
(NORMAL)
CAPSTAN
Q336 – 343
M
M1
(CAPSTAN)
– 21 –
– 22 –
HCD-GRX50/R770/RXD7
7-3. BLOCK DIAGRAM – MAIN Section –
(GRX50: Saudi Arabia)
DIGITAL ECHO
IC711
J711
MIX MIC
(Page 20)
A
(Page 22)
B
VIDEO
(AUDIO) IN
MD IN
(Page 25)
D
(R770/RXD7: AEP)
FM 75
COAXIAL
CD-L
PB-L
J101 (1/2)
L
R
L
R
SPEANA
R-CH
R-CH
MIC AMP
IC712 (1/2)
65 66 68
69
67
FM/AM TUNER UNIT
RV712
MIC LEVEL
IN E2 IN D2
INPUT
IN B2
SELECT
IN A2
SWITCH
IN C2
R-CH
INPUT SELECT SWITCH,
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC101
RV711
ECHO LEVEL
SOUND
CONTROL
CIRCUIT
MIC AMP
IC712 (2/2)
KEY IN2
KEY IN1
KEY OUT 2
60 5 59 6
KEY OUT 1
BASS FREQ.
2 58 57
MIC IN
REC A2
+
+
L+R
+
493-DATA
493-CLK
493-LATCH
DBFB-H/L
30
47 48 38
7
44
GRAPHIC EQUALIZER
CONTROL CIRCUIT
R-CH
D607 D644
REC B2
F OUT2
42 41
REC-L
L
R-CH
R-CH
SUPER
WOOFER
BUF
OUT2
FEED BACK
R-CH
72
36
SWITCH
Q112
R-CH
D141
R-CH
+
VOL IN2
VOLUME
CONTROL
COMMAND
+
CPU
INTERFACE
DATA
CLOCK
34
LATCH
BASS BOOST
CONTROL
CIRCUIT
BB B2,
BB A2
38, 39
DBFB CONTROL
SWITCH
Q111
CONTROL SWITCH
BUF IN2
373233
BASS FREQUENCY
Q201
R-CH
+
(GRX50/RXD7: Canadian)
D191
PROTECT
SWITCH
Q192
R-CH
R-CH
MUTING
(EXCEPT RXD7: Canadian)
–1
–2
Q191
M501 (FAN)
M
FAN MOTOR
DRIVE
Q401, 402
R
J101 (2/2)
J191
SUPER
WOOFER
IMPEDANCE USE 6 – 16
C
MD OUT
TM401
SPEAKER
+ –
+ –
(Page 22)
L
R
FM
75
AM
(GRX50/RXD7: Canadian)
• SIGNAL PATH : TUNER (FM/AM)
: CD PLAY : TAPE PLAY
: RECORD : MIC INPUT
(Page 25 )
RESET
E
ANTENNA
FM ANT
FM ANT
AM ANT
AM ANT
ST-L ST-R
ST-MUTE
STEREO
TUNED
ST-DIN
ST-DOUT
ST-CLK
ST-CE
RDS-DATA
RDS-INT
R-CH
(R770/RXD7: AEP)
32.768kHz
05
X601
X613
16MHz
49 50 51
53 54 55 52
21 20
11
10
13
15
ST-MUTE STEREO TUNED
ST-DOUT ST-DIN ST-CLK ST-CE
RDS-DATA RDS-INT
XC-OUT
XC-IN
X-OUT
X-IN
SYSTEM CONTROLLER
IC501 (3/4)
STK-MUTE
LINE-MUTE
AC-CUT
PROTECTOR
F-RELAY
RY-SW
RESET
POWER AMP
IC801
MUTING
Q113
R-CH
1
MUTING CONTROL
SWITCH
Q508, 509
6
22
12
27
3
36
RESET SWITCH
Q501
STANDBY SWITCH
Q803, 804, 881
+5V
RESET SIGNAL
GENERATOR
IC502
+
R-CH
(EXCEPT RXD7: Canadian)
TEMPERATURE
TH831
OVER LOAD
DETECT
Q801
DC DETECT
SWITCH
Q433, 434
DETECT SWITCH
Q831, 832
+
R-CH
D803
PROTECT SWITCH
Q439
MUTING CONTROL
SWITCH
Q412
OVER LOAD
DETECT SWITCH
Q432
OVER LOAD
DETECT SWITCH
PROTECT SWITCH
Q435, 436
Q437
MUTING
Q411, 471
RELAY DRIVE
Q431
J701
PHONES
RY401
– 23 –
– 24 –
HCD-GRX50/R770/RXD7
7-4. BLOCK DIAGRAM – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
D
FLUORESCENT INDICATOR TUBE DRIVER,
KEY CONTROL
IC601
BAND-PASS FILTER
IC603
SPEANA
(Page 23)(Page 23)
E
RESET
(R770/RXD7)
+5V REGULATOR
IC11
SUB POWER TRANSFORMER
RECT
D12 – 15
T11
GRID DRIVE
Q607 – 612
FL601
FLUORESCENT INDICATOR TUBE
GRID DRIVE
Q613
S611 – 621, 625 – 630,
S638 – 651, 751 – 757
REMOTE CONTROL
RECEIVER
IC602
S601
(JOG DIAL)
S602
VOLUME
ROTARY
ENCODER
S601
ROTARY
ENCODER
S602
45
1
2 8
9
10
05
S LOW FREQ (BPF0)
46 – 67
S1 – S22
32 – 27
G13 – G18
G2 – G12
44 – 42, 40 – 33
GR1
11 – 14
KEY0 – KEY3
SIRCS
JOG-A JOG-B
VOL-A VOL-B
72
ALL BAND (L+R)
LED DATA
I2C DATA
WAKE UP
XOUT
XIN
70
X601
12.5MHz
BPF1 BPF2
BPF3 BPF4
RESET
L SEL
LED SCK
LED LAT
I2C CLK
16 17 18 19 20
21
73
7
5 3 4
78 79
22
F01
17
F02
16
F04
14
DET
F05
13
F06
12
L+R
11
DET
LED DRIVER
IC604
DATA
13 14
CLK
15
STB
SYSTEM CONTROLLER
IC501 (4/4)
IIC-DATA
30
IIC-CLK
29
WAKE UP
18
LINE
B.P.F.
17, 19 – 23, 2, 3, 5, 7, 10, 11
P1 – P6, P8, P9, P11, P12, P15, P16
FL SW
STBY RELAY
CD-POWER
POWER
STBY LED
TIMER LED
IN
REC IN
42 43
5
2
39
26
LED DRIVE
Q604, 605
LED DRIVE
4
6
B+ SWITCH
Q601, 602
D611 – 616, 619 – 622, 624,
D627 – 631, 751 – 753
Q606
Q603
(R770/RXD7)
TIMER SELECT
D754
I/u
LED +5V
CD SENSOR CIRCUIT B+
D632
SYSTEM CONTROLLER
(IC501) B+
(PANEL SECTION B+)
CD D+5V, CD A+5V
CD MECHANISM DECK
SECTION B+
D+5V
M62493FP (IC101),
+5V
+5V (STBY)
(R770/RXD7)
D501, 502
D509
B+ SWITCH
Q907, 908
B+ SWITCH
Q904, 905
D+5V
(TAPE DECK SECTION B+)
LED +5V
(PANEL SECTION B+)
(GRX50)
(R770/RXD7)
D925
(GRX50)
(R770/RXD7)
D923
(GRX50)
(R770/RXD7)
D922
(GRX50)
(R770/RXD7)
D924
(GRX50)
(R770/RXD7)
–26V
(FL DRIVER (IC601) B–)
REGULATOR
TC, PANEL,
REGULATOR
CONTROL SWITCH
Q903, 923
CD M+7V
(CD MOTOR SECTION B+)
TC M+12V
(TC MOTOR SECTION B+)
ST +10V
(FM/AM TUNER UNIT B+)
+5V
IC902
AUDIO
–26V REGULATOR
Q13
TO FLUORESCENT
INDICATOR TUBE
(FL601)
POWER AMP (IC801), PROTECTOR CIRCUIT
(GRX50)
+7V
–7V
(EXCEPT RXD7: Canadian)
FAN MOTOR B–
+10V
REGULATOR
Q909
REGULATOR
Q901, 902, 913
REGULATOR
Q914, 951, 952
FL ON/OFF
SWITCH
Q12, 17
FL ON/OFF
SWITCH
Q14 – 16
VF1 VF2
B+ B–
B+ B–
–26V REGULATOR
Q971
+7V
–7V
D405 – 407
+7V
REGULATOR
IC901
+12V
REGULATOR
IC903
RECT
D17 – 20
(GRX50)
RECT D832
RECT D831
RECT D971
RECT
D901 – 904
RECT
D907 – 910
RELAY DRIVE
RY11
Q11
POWER TRANSFORMER
T951
EXCEPT E2, E3, Saudi Arabia, Argentina, Singapore, Taiwan
VOLTAGE
SELECTOR
S951
E2, E3, Saudi Arabia, Argentina, Singapore, Taiwan
AC IN
(GRX50)
AC IN
– 25 –
– 26 –
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