NEW PRODUCT BULLETIN

Integrated Amplifier
High performance amplifier that takes full advantage of the sound quality benefits of balanced amplification Floating Balanced Power Amplifier Triple parallel electronic volume and tone controls

HiFi Began with Yamaha

Yamahas involvement with and passion for music goes back more than a century, to when we built our first reed organ in 1887. Now we are the worlds leading producer of pianos and other musical instruments, and are involved with music in many other ways as well. We manufacture professional recording equipment, we design concert halls and we assist artists at concerts with set up and sound tuning. This knowledge and experience benefits our production of audio components in many ways. We introduced our first HiFi (High Fidelity) turntable in 1954, becoming the first company to actually use the term HiFi. Thereafter we were one of the first to offer mass-produced, high quality audio equipment, and introduced many legendary stereo components. We hope you enjoy the genuine HiFi experience of Yamaha Natural Sound.
The brilliantly expressive capabilities of Yamahas floating and balanced design now available to a wider range of music lovers.
Yamahas All-New Approach to Achieving Superior Performance
The development of the modern audio amplifier began in the 1960s with the introduction of full-transistor amplifiers. In the 1970s, pure complementary configured power amps appeared, made possible by high output PNPNPN transistors, and became the dominant type of analogue amplifier. Now digital amps have become popular for their high conversion efficiency and superior operating precision, as well as for their lower weight, size and heat production as compared to analogue amps. Some manufacturers of audiophile-quality amps are working to improve the traditional pure complementary analogue amplifier, while others are seeking to achieve higher sound quality from digital amplifiers. But Yamaha has developed a third approach that we believe is superior to the other two. The Floating Balanced Power Amplifier uses patented technologies featuring power transistors with the same polarity at the output stage to achieve completely symmetrical operation. First introduced in the A-S2000, this method is also used to good effect in the A-S1000, which combines a floating balanced power amp section with a high quality preamp section. Simpler in configuration yet with many of the same sound quality features as the ultra
high-end A-S2000, it will deliver excellent performance with the CD-S1000 Super Audio CD Player and other high quality components.
High Performance Amplifier that Brings Out the Best of Other Components
The power amp, power supply, and phono EQ circuits that contribute to the A-S1000s high sound quality are identical to those of the A-S2000, while the line amp section and volume and tone circuits are nearly the same. Designed to take full advantage of the excellent sonic qualities of the matching CD-S1000, the A-S1000 will also bring out the best of other high performance components.
output stage. The use of four sets of floating power supply units (not connected to earth), provides further operating precision. The result is very low levels of noise and distortion for exceptionally pure and transparent sound quality.
Conventional Power Amplifier
Power amp and signal input and output are connected to ground
Noise Speaker Power Supply Feed back

Ground wiring

Power Supply
Ground wiring Noise enters power amp through ground
Floating Balanced Power Amplifier
A-S1000 Floating Balanced Power Amp
With the A-S2000 and now the A-S1000, Yamaha has taken the bold step of using a floating balanced configuration to update the power amplifier for serious music fans. This method, which is completely different from the pure complementary circuit that has been the main type used for the past four decades, features identical polarity on the plus and minus side of the output stage. By completely isolating the plus and minus sides of the left and right channels of both the NFB and power supplies, it achieves perfectly symmetrical operation in the

Symmetrical

Speaker

Floating power supply

Feedback

S Signal +

S Signal Ground wiring
Triple Parallel Electronic Volume and Tone Controls
Conventional audio amps have the volume and tone control circuits arranged in series (in line); when the tone controls are used, the signal route becomes more complicated, which can lower sound quality. Many high quality amps therefore have a default circuit that can be selected to bypass the tone controls, but this forces you to choose between tone control and optimum quality. The A-S2000 and A-S1000 are the first amplifiers to avoid this problem by employing triple parallel electronic volume and tone controls, providing maximum sound quality even when the tone controls are used (signal goes through fewer ICs, so there is less noise). When the tone controls are set to the center position, the passive element used for tone control is bypassed, so the three volume elements connected in parallel operate solely to drive and control the volume, for more efficient use of the power output. Each volume element is an ultra-high quality device and an analogue potentiometer is used to provide a very smooth operating feel.
Completely symmetrical left-right construction.
Large heat sink, huge power transformer, custom-made block capacitors (18,000F) and preamp board.
MC Head Amp and Equaliser Amp Block Diagram

MC Head Amp

Relay for Selecting MC Head Amp

EQ Amp

MC Head Amp +B EQ Amp +B

Lch In

Fully Discrete Phono Equaliser and MC Head Amp
The A-S1000 uses a fully discrete phono equaliser circuit, whose quality is comparable to those in high-end control amps. And with

Phono Out

EQ Amp -B MC Head Amp -B

Conventional Amplifier

Volume In Tone control circuit Bass / Treble

Bypass

Signal passes through two circuits

increased noise

its high priority on maximising musical response, it is also equipped with a discrete head amp for MC cartridges. If you enjoy listening to records via high performance cartridges, the A-S1000 is an ideal choice.
parts that directly affect sound quality were chosen only after extensive testing.

Symmetrical Construction

Although it is an integrated amplifier, the A-S1000 has a completely left-right symmetrical construction that makes it virtually the equal of separate amps. A central reinforcing bar ensures that the chassis is totally rigid.

A-S1000

Power is provided by four large capacity power supplies that are completely isolated from earth. In the preamp stage, the combination of a low-current circuit that prevents the occurrence of noise due to current fluctuation and 12 shunt regulators supply all stages with clean and stable power. The extra-large power transformer, the carbon sheath block capacitors and other

Treble Volume In

Flat Out

Specially Designed Feet

The base is equipped with height adjustable, solid steel feet that maximise stability and thoroughly dampen any external vibration.
Signal passes through one circuit
lower distortion, higher S/N ratio
A-S1000 Main Specifications
[AUDIO SECTION] Maximum Power Minimum RMS Output Power Maximum Power Dynamic Power/Channel Damping Factor (4 ohms, 1 kHz, 0.7 % THD, for Europe) (8 ohms, 20 Hz20 kHz, 0.02% THD) (4 ohms, 20 Hz20 kHz, 0.02% THD) (8 ohms, 1 kHz, 10% THD) (4 ohms, 1 kHz, 10% THD) (8/6/4/2 ohms) (8 ohms, 20 Hz20 kHz) CD, etc. Phono MM Phono MC Main In CD,etc. to Speaker Out, Flat Position CD,etc. to Speaker Out, Flat Position Phono MM Phono MC CD, etc. to Speaker Out Phono MM to Rec Out Phono MC to Rec Out 160 W + 160 W 90 W + 90 W 140 W + 140 W 115 W + 115 W 190 W + 190 W 105/135/190/220 W mV/47 k-ohms 2.5 mV/47 k-ohms 100 V/50 ohms 1 V/47 k-ohms 5 Hz100 kHz, +0 dB/-3 dB 20 Hz20 kHz, +0 dB/-0.3 dB 20 Hz20 kHz, 0.5 dB 20 Hz20 kHz, 0.5 dB 0.015% (90 W/8 ohms) 0.005% (2 V) 0.05% (2 V) Signal-to-Noise Ratio [IHF-A Network] Residual Noise Channel Separation (1 kHz/10 kHz) CD, etc. (150 mV, Input Shorted) Phono MM (5mV, Input Shorted) Phono MC (500 V, Input Shorted) CD, etc. [IHF-A-Network] CD, etc., Input 5.1 k-ohms Terminaled Phono MM, Input Shorted, Vol: -30dB Phono MC, Input Shorted, Vol: -30dB Bass Boost/Cut (at 50 Hz) Bass Turnover Frequency Treble Boost/Cut (at 20 Hz) Treble Turnover Frequency [GENERAL SECTION] Dimensions Weight (W x H x D) 435 x 137 x 465 mm 17-1/8 x 5-3/8 x 18-5/kg 48.5 lbs. 98 dB 93 dB 85 dB 73 V 74 dB/54 dB 90 dB/77 dB 66 dB/65 dB 9 dB 350 Hz 9 dB 3.5 kHz
Tone Control Characteristics
Input Sensitivity/Impedance
Frequency Response RIAA Equalisation Deviation Total Harmonic Distortion (20 Hz20 kHz)

The perfect match:

Super Audio CD Player
For details please contact:
Yamaha Electronics UK Ltd. 200 Rickmansworth Road Watford Herts, WD18 7GQ Tel:www.yamaha-uk.com

P10019746W-AS1000@NPB

When installing the knob unit, it is necessary to position them as specified. (Refer to When installing the knob unit.)
Panel side L Top cover Coned disc spring L Hook
Hook Washer side 3 POWER ON / OFF switch
Refer to PRINTED CIRCUIT BOARDS: MAIN (3) P.C.B.

Panel side R

I DISASSEMBLY PROCEDURES /
(Remove parts in the order as numbered.) Disconnect the power cable from the AC outlet.
1. Removal of Panel Side L/R
a. Remove 2 screws (1), 2 coned disc spring L and 2 washers side. (Fig. 1) b. Lift the panel side L upward and release 3 hooks. Then remove the panel side L. (Fig. 1) c. Remove 2 screws (2), 2 coned disc spring L and 2 washers side. (Fig. 1) d. Lift the panel side R upward and release 3 hooks. Then remove the panel side R. (Fig. 1) 1

Coned disc spring L 6

Knob TC unit Front panel Lock set screw Washer side

Knob SEL unit

2. Removal of Top Cover
a. Remove 7 screws (3), 2 screws (4) and 2 screws (5). (Fig. 1) b. Remove the top cover. (Fig. 1) 5

Knob VOL unit

An Allen wrench
3. Removal of Front Panel
Prepare an Allen wrench (2 mm) for removal of knob unit.

Fig. 1

a. Loosen lock set screw to remove the knob VOL unit. (Fig. 1) b. Loosen lock set screw to remove the knob SEL unit. (Fig. 1) c. Loosen each lock set screw to remove 3 knob TC unit. (Fig. 1) d. Remove 8 screws (6). (Fig. 1) e. Set the POWER ON/OFF switch to the ON position. f. Remove the front panel forward gradually using care not to cause damage the switches. (Fig. 1)
G When installing the knob VOL unit: a. Turn the VOLUME (VR501) counterclockwise fully. (Fig. 2) b. Match the slit in the knob VOL unit with the VOLUME MIN position and install it in that state. (Fig. 2)
At this time, do not tighten the lock set screw.
c. Keep about 0.5 mm to 0.75 mm clearance from the front panel to knob VOL unit. (Fig. 2) d. Match the lock set screw position with the cut in VOLUME (VR501) and tighten the lock set screw. e. After installation, perform following checks. Turn the knob VOL unit both directions to check that it does not rub against the front panel. Turn the knob VOL unit clockwise fully and check that the slit in it matches with the VOLUME MAX position. Turn the knob VOL unit counterclockwise fully and check that the slit in it matches with the VOLUME MIN position. G When installing the knob SEL unit: a. Turn the INPUT (SW501) so that the cut in it comes at the top. (Fig. 2) b. Install the knob SEL unit with its lock set screw positioned at the top. (Fig. 2)
e. After installation, perform following checks. Turn the knob TC unit in both directions to check that it does not rub against the front panel. Turn the knob TC unit counterclockwise fully and check that the slit in it matches with the BALANCE L position. Turn the knob TC unit clockwise fully and check that the slit in it matches with the BALANCE R position.

G When installing the power unit: When installing the power unit, be very careful not to cause any damage to the cable at the bottom with the end of the screw. (Fig. 6)

Bottom view

Cable Front side

End of the screw

Rear side

Fig. 6

Remove frame panels L/R. Put the rubber sheet and cloth over this unit. Then place the P.C.B. slantingly on the cloth and check it. (Fig. 7) Reconnect all cables (connectors) that have been disconnected. In this unit, the ground of the amplifier unit L/R is connected to the chassis. When the amplifier unit L/R is removed from the chassis, connect the ground point to the chassis, using a ground lead wire or the like. (Fig. 7) It is also possible to check the amplifier unit L/R from the bottom. (Fig. 7)
AMP unit L Rubber sheet and cloth

Ground lead

AMP unit R

Fig. 7

7. Removal of FUNCITON (2) P.C.B.
a. b. c. d. e. Remove 4 screws (F) and screw (G). (Fig. 8) Remove CB401-404, CB407 and CB408. (Fig. 8) Remove the connector TR. (Fig. 8) Disconnect the cable (W4004) from the bottom. (Fig. 9) Remove FUNCTION (2) P.C.B. (Fig. 8) F G
F Solder Barrier SP L Speaker terminal L J

CB408 CB407 CB402 F

FUNCTION (2) P.C.B. CB404 CB403
I FUNCTION (3) P.C.B. H CB2 FRONT (13) P.C.B. K K G P CB23 P N Speaker terminal R L CB27 L CB59 Connector TR FRONT (11) P.C.B. Barrier SP R O
FRONT (12) P.C.B. Frame side R

Solder

Fig. 8

Fig. 9

8. Removal of Speaker Terminal L/R
a. b. c. d. e. f. g. h. i. j. k. l. m. n. o. p. q. Remove 2 screws (H) and 2 screws (I). (Fig. 8) Remove CB2, CB23 and CB79. (Fig. 8) Remove FUNCTION (3) P.C.B. (Fig. 8) Remove 2 push rivets (J) and then remove the barrier SP L. (Fig. 8) Remove 5 screws (K). (Fig. 8) Remove the speaker terminal L together with the P.C.B. (Fig. 8) Unsolder the P.C.B. to separate the speaker terminal L. (Fig. 8) Remove 2 screws (L). (Fig. 8) Remove CB27. (Fig. 8) Remove FUNCTION (11) P.C.B. (Fig. 8) Remove 4 screws (M) and 3 screws (N). (Fig. 8) Remove frame side R. (Fig. 8) Remove 2 push rivets (O) and then remove the barrier SP R. (Fig. 8) Remove 5 screws (P). (Fig. 8) Remove CB59. (Fig. 8) Remove the speaker terminal R together with the P.C.B. (Fig. 8) Unsolder the P.C.B. to separate the speaker terminal R. (Fig. 8) H I

Top cover
RS232C conversion adapter (Including flexible flat cable 9P, 300mm) / Part no.: AAX77610
G Preparation and precautions before starting the operation
Download firmware upgrading program and firmware from the specified source to the same folder of the PC. Prepare the above specified RS232C cross cable. While writing, keep the other application software on the PC closed. It is also recommended to keep the software on the task tray closed as well.
Writing port / (FRONT (1) P.C.B.: CB515)
to writing port / Serial port (RS232C) / RS232C conversion adapter /

RS232C cross cable /

FLASH UCOM

SW301 OTHER

Flexible flat cable (9P) /
Connect the power cable of this unit to the AC outlet. At this time, set the POWER ON/OFF switch to the OFF position. 6. Start up FlashSta.exe. Select Program is displayed. (Fig. 2) 7. Select Program: Inter flash memory, RS232C Port: COMx (serial port of the PC connected to this unit). (Fig. 2) 8. Confirm settings and click [OK]. M16C Flash Start is displayed in about 5 seconds. (Fig. 2) 9. Set the POWER ON/OFF switch to the ON position. 10. Click [OK]. (Fig. 2) Set baudrate is displayed. (Fig. 3)
Select Inter flash memory.

After a 5 seconds /

Select the serial port of the PC connected to the main unit.
11. Select 38400 for Baud rate and 15 for Program_intervals (ms). (Fig.3) 12. Click [OK]. (Fig.3)
Select 38400bps or below for the baud rate. * Reduce the baud rate if a transmission error occurs frequently.
13. ID Check is displayed. (Fig. 4) Click [Refer.], and select A-S1000.s2. (Fig. 4) * The ID code and MCU type are loaded automatically when the file is selected. (Fig. 4) Click [OK]. (Fig. 4)
When [Refer.] is clicked, the open file screen is displayed.
Select the firmware A-S1000.s2.
14. M16C Flash Start is displayed. (Fig. 5) Click [E.P.R.], and Erase OK? is displayed. (Fig. 5) Click [OK] to start writing. (Fig. 5) 15. When writing is completed, Program OK. is displayed. (Fig. 5) Click [OK]. (Fig. 5) 16. Set the POWER ON/OFF switch to the OFF position. 17. Disconnect the power cable of this unit from the AC outlet. 18. End "FlashSta. exe." 19. Disconnect the RS232C cross cable, RS232C conversion adapter and flexible flat cable.
When click [E.P.R.], Erase OK? is displayed.
When click [OK], writing is started.

Writing /

Collating /

Click [OK].

Writing completed / Fig. 5
G Confirmation of Firmware Version
Confirm that the firmware is updated successfully by checking the Indication of Firmware Version by the self-diagnostic function. For more information, refer to SELF-DIAGNOSTIC FUNCTION.
G Indication of Firmware Version

Operation procedures

Turn the BALANCE and TREBLE knobs clockwise fully and then while pressing down the AUDIO MUTE switch, set the POWER ON/OFF switch to the ON position. (Fig. 6)

PS AMP protection 1/2 /

Flashing 3 /
500mS 500mS 500mS 500mS 500mS 1000mS 500mS 500mS 500mS 500mS 500mS 500mS
AMP DC protection L/R ch /

Flashing 4 /

500mS 500mS 500mS 500mS 500mS 500mS 500mS 1000mS 500mS 500mS 500mS 500mS
HP DC protection L/R ch /

Flashing 5 /

500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 1000mS 500mS 500mS

I protection L/R ch /

Flashing 6 /
500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 1000mS

TMP protection L/R ch /

Flashing 7 /
500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS 500mS
G Details of Protection Information
PS (Power Supply) protection
Cause : The voltage in the power supply section is abnormal. Normal value : 0.804 to 1.604V Detection port : PRV (FRONT P.C.B. 40 pin of microprocessor IC502) Detected at : CB21, CB22 and CB23 of power transformer, +18V, +12C of FUNCTION P.C.B., MC 20V, MM 25V, LINE1 25V, LINE2 25V, VOL1 12V and VOL2 12V of FRONT P.C.B.
PS AMP source protection 1/2
Cause : Abnormal voltage of amplifier power source Normal value : LOW (0V) Detection port : PSVA1 (FRONT P.C.B. 48pin of microprocessor IC502) PSVA2 (FRONT P.C.B. 47 pin of microprocessor IC502) Detected at : PSVA1 (CB24 and CB26 of power transformer) PSVA2 (B1, B2, B3 and B4 of MAIN P.C.B.)
Amplifier DC voltage protection L/Rch
Cause : Abnormal DC voltage of amplifier output L/R Normal value : 0.332 to 1.028V Detection port : PRDL (FRONT P.C.B. 3 pin of microprocessor IC502) PRDR (FRONT P.C.B. 2 pin of microprocessor IC502) Detected at : PRDL (Amplifier output Lch of MAIN P.C.B.) PRDR (Amplifier output Rch of MAIN P.C.B.)
Headphone DC voltage protection L/Rch
Cause : Abnormal DC voltage of headphone output L/R Normal value : 0.229 to 0.635V Detection port : HPPRDL (FRONT P.C.B. 62 pin of microprocessor IC502) HPPRDR (FRONT P.C.B. 63 pin of microprocessor IC502) Detected at : PRDL (Headphone amplifier output Lch of MAIN P.C.B.) PRDR (Headphone amplifier output Rch of MAIN P.C.B.)

I protection L/Rch

Cause : Excess current flow into amplifier Normal value : LOW (0V) Detection port : PRIL (FRONT P.C.B. 21 pin of microprocessor IC502) PRIR (FRONT P.C.B. 20 pin of microprocessor IC502) Detected at : PRIL (Amplifier output Lch of MAIN P.C.B.) PRIR (Amplifier output Rch of MAIN P.C.B.)

TMP protection L/Rch

Cause : Abnormal temperature of heat sink Normal value : 0.200 to 1.550V Detection port : THML (FRONT P.C.B. 1 pin of microprocessor IC502) THMR (FRONT P.C.B. 64 pin of microprocessor IC502) Detected at : PRDL (Heat sink temperature detection Lch IC202 of MAIN P.C.B.) PRDR (Heat sink temperature detection Rch IC202 of MAIN P.C.B.)
G Starting in the Protection Cancel mode

CAUTION!

If this product is used with a failure un-repaired and the protection function disabled, the protection function does not work even in a dangerous state, possibly resulting further in damage. Use special care when using this mode. When the protection function works due to an I protection L/Rch, it is not possible to start this unit with the protection function cancelled. If the protection function works and causes hindrance to trouble shoot, it will be possible to start this unit in the protection cancel mode by following procedures.
Turn the BALANCE knob counterclockwise fully and then while pressing down the AUDIO MUTE switch, set the POWER ON/OFF switch to the ON position. At this time, keep pressing down the AUDIO MUTE switch for 3 seconds or longer. The POWER indicator lights up and the power supply relay (RY1 of FUNCTION P.C.B.) turns on.

I IC DATA

IC502: M38039xxxxx (FRONT P.C.B.) Single chip 8-bit microprocessor
Main clock input XIN 30 Main clock Sub-clock Sub-clock output input output XOUT XCIN XCOUT 29 Reset input RESET 27

VSS 32

VCC 1 Data bus

CNVSS 26

MICROPROCESSOR Clock generating circuit RAM ROM A X Y S PCH PCL PS
Timer 1 (8) Prescaler 12 (8) Prescaler X (8)
Timer 2 (8) Timer X (8) Timer Y (8)
Prescaler Y (8) Timer Z (16)

A/D converter (10)

PWM (8)

SI/O2 (8)

SI/O1 (8)

D/A converter 2 (8)

D/A converter 1 (8)

SI/O3 (8)

P6 (8)

P5 (8)

P4 (8)

INT00 INT1 INT2 INT40

INT01 INT41

P3 (8)

P2 (8)

P1 (8)

P0 (8)

VREF AVSS

I/O port P6

I/O port P5

I/O port P4

I/O port P3

I/O port P2 (LED drive)

I/O port P1

I/O port P0

56 RY_PHONO

55 RY_MMMC

63 HP_PRDR

62 HP_PRDL

54 RY_BYP

51 EV2_DA
THM_L 1 PRD_R 2 PRD_L 3 RY_SPA 4 RY_SPB 5 /ICEX 6 /CSEX 7 EV1_CE 8 EV1_CL 9 EV1_DA 10 EX_DI 11 232_RTS 12 232_CTS 13 232_TXD 14 232_RXD 15

M38039xxxxx

O O O O O O O O O O O O I I I I I
FUNCTION LED CD FUNCTION LED TUNER FUNCTION LED LINE1 FUNCTION LED LINE2 FUNCTION LED BALANCE FUNCTION LED PHONO FUNCTION LED MAIN_DIRECT LED MUTE Treble control Bass control Initial clear extended IC Detect head phone insert, H: HP non inserted / L: HP inserted Balance gain select SW Detect switch for MUTE Detect switch MMMC, Hi: MC / Low: MM
IC501: TC74HC4051AFEL (FRONT P.C.B.) 8-channel analog multiplexer/demultiplexer
Function Name (P.C.B.) +5STBY SP_AB HPTRIM CNTR_TAP LRBAL 4051A 4051B 4051C MG MG MG TONE_BAS TONE_TRE EXAD I_SEL I_VOL
VCC A B C GND VEE INH COM 6 4

O I I I I I I I I

SP_AB rotary SW HP_TRIM rotary SW TREBLE, BASS, L/R BALANCE reference of center TAP LR_BALANCE volume AD
BASS volume AD TREBLE volume AD COM out Function selector rotary SW AD MAIN VOLUME AD
I PIN CONNECTION DIAGRAMS
BA15218F LB1641 LC709004A-TLM-E LM61CIZ LME49723MA

1 +VS VOUT GND 4

NE5532DR

NJM2068MD-TE2

NJM2082M-TE1

NJM7812FA

3: IN 2: COM 1: OUT

NJM7912FA

RH5RE58AA-T1-FA

TC74HC4051AFEL

TC94A81UG
8 1: COMMON 2: INPUT 3: OUTPUT 1: Vin 2: GND 3: Vout 44 1

Diodes

1N4002S 1SS244

1SS355 1SS380

D15XB20-7001 RS603M-B-C-J80

Cathode

MA8024 2.4V MA8030-L 2.9V MA8051-L 5.0V MA8051-M 5.1V MA8056 5.6V MA8062-L 6.0V MA8062-M 6.2V RB441Q-40
MA8091-L 8.8V MA8100-H 10.3V MA8100-M 10.0V MA8120 12.0V MA8120-L 11.7V MA8120-M 12.0V MA8082-H 8.5V
MA8200-M 20.0V MA8240-H 25.0V MA8300-M 30.0V

HZS6C1 6.0V

CATHODE

RLS245

Anode Anode

S1NB60 1.0A 600V

AC Cathode AC Cathode +

Transistors

2SA970 2SC2240 2SC2878 2SA1036K 2SD1938F 2SA1312-GR,BL 2SA1037K 2SA1708 2SC4488 2SA1145 2SC2705

C E E CB B

2SA2168 2SC5291

2SA2180 ST 2SC6081 ST

2SC1740S

2SC1846 S

2SC2412K

2SC3324-GR,BL

2SC3852

2SC4468 O,P,Y

2SK208-Y

2SK209

C E B B CE B

G D C E S

2SK369

5HP01C-TB-E

DTA144EKA DTC114EKA DTC144EKA

KRA104S-RTK KRC104S-RTK

OUT 1 1: GND 2: IN 3: OUT COMMON IN

J A-S1000

I BLOCK DIAGRAM
See page 59-61 SCHEMATIC DIAGRAM
VOLUME & TONE CONTROL

TONE CONTROL DEVICES

FUNCTION
See page 55-57 SCHEMATIC DIAGRAM
FLOATING BALANCED POWER AMPLIFIER
HOT (POSITIVE PHASE) SIDE

SPEAKER DRIVER

RY_BYP IC411 RY402

RY_DIR RY404

SPCH A L/R CH RY201/R111 SPCH B L/R CH

RY202/R112 RY_SPA RY_SPB

Q1001-1016 RY101

HOT(+)

SPEAKERS L/R CH

MC HEAD AMP

RY102 Q1017-1038

IC412 RY_PHONO POL/POR

MAIN DIRECT

PHONO L/R RY_MMMC

EQ AMP MM/MC CD L/R

INPUT BUFFER

LINE AMP.

COLD(-)

LINE1 L/R LINE2 PB L/R

INPUT SELECTOR

LINE2 REC OUT L/R

TUNER L/R

COLD (NEGATIVE PHASE) SIDE

to POWER AMP. R CH

BUFFER AMP.

PRE OUT

PRD PRI THM IC303 IC414 RY501

PHONES

MAIN IN
PRD RY_DIR RY_BYP RY_UNBAL 34 RY_BAL 32 RY_CD 26 RY_TU 27 RY_LRY_LRY_MMMC 55 RY_PHONO 56
THM HP_PRD PSVA1 PSVA2 1,64 62,63 IC47
BALANCE UNBALANCE CONVERTER
4 RY_SPA 5 RY_SPB RY_PWR PRV1 PRV PRV
HP END LOW IMPEDANCE DRIVE HEADPHONE AMP.

POWER TRANSFORMER

For LINE AMP1 +25V/-25V For LINE AMP2 +25V/-25V For VOLUME2 +12V/-12V For VOLUME1 +12/-12V For MC AMP +20V/-20V For EQ AMP +25V/-25V

MICRO PROCESSOR

INDEPENDENT FLOATING POWER SUPPLY

+B3/-B3

D305 D335

for HOT

A/B/C 41-43
LED_PWR REM IC501 3,4 SP_AB 15
I_BAS 5 I_TRE 4 I_LRBAL 12 I_SEL 2

MVOL+/- 36,37

INDEPENDENT REGULATED POWER SUPPLY (for AUDIO)

PDET PRV

+B4/-B4

for MICROPROCESSOR

SUB-TRANSFORMER

T1 D304

for COLD

I_VOL 1

(for POWER AMP / VOLTAGE AMP STAGE)

+B1/-B1

POWER SWITCH

D300 RY1

+B2/-B2 PSVA1 PSVA2 +12V

AC IN SPEAKER REMOTE

See page 58 SCHEMATIC DIAGRAM
TREBLE INPUT SEL BASS BALANCE VOLUME

VR501 IC51

FRONT PANEL

to SPEAKERS RELAY

D306 IC52 -12V

A A-S1000 1

I PRINTED CIRCUIT BOARDS
FUNCTION (1) P.C.B. (Side A)

FUNCTION (1)

(W3005)
PREOUT_RAGND PREOUT_R+ AGND PREOUT_LAGND PREOUT_L+ AGND MBAL_RAGND MBAL_R+ AGND MBAL_LAGND MBAL_L+

(W3002)

AGND L AGND R AGND

AGND AGND

(W3001)

(W3007)

RY_DIR RY_BYP EV1_MT EV1_CE EV1_CL EV1_DA MT_M -12RY SW_TRE SW_BAS EV2_CE EV2_CL EV2_DA MG

(CB517)

FRONT (2)

(CB504)

PHR PHL

FRONT (11)

CB402 CB408 W4005
IC410 LINE1+25V LINE1GND LINE1GND LINE1-25V 60VGND 60VGND NC OPE+12 AGND AGND OPE-12 -12RY 34 33

(W3003)

INRE INR+

Circuit No. C4233, 4224

MAIN (1)

(W102)

INRAGND INR+

MAIN (2)

(W202)

(Side B)

Ref no. Location Ref no. Location Ref no. Location Ref no. Location
D4012 D4014 C6 E6 C6 C6 D4022 D4023 D4028 D4030 E6 E6 G6 H6 D4031 D4032 D4045 D4046 G6 G6 H6 H6 Q4002 Q4008 Q4010 Q4011 C4 I4 D4 I4

D4015 D4016

(CB501)
PDET /RES RY_PWR MG 9V -12C PRV RY_SPA RY_SPB +5M

FUNCTION (3) P.C.B.

U, C, T, K, A, B, G, J models

R, L models

PSVA1 PSVA2 MG +5M PRV

PSAV1 PSAV2 MG

MAIN (3)

(W317)

Brown Brown Black

PRMSW1

PRMSW2

POWER ON/OFF switch

COM OUT IN COM OUT IN
FRONT (14) (W8A, W8B) R, L models

W11B W11A

POWER TRANSFORMER U, C, T, K, A, B, G, J models

(CB302)

Ref no. Location
D9 D11 D306 IC51 IC52 Q3 Q5 Q144 Q145 Q146 Q147 E3 E3 G4 F5 G5 F4 F4 G6 G6 G6 G6
Circuit No. C6 CB2 J1 W11A, W11B
U, C, T, K, A, B, G, J X X O O

R, L O O X X

FRONT (13)

(CB79)

Semiconductor Location 5

D1 D2 D3

E4 E4 E4 D4 D4 E4 E4 D4 D3 D4 G5 E4 E4 D4 E4 D4 D4

D4 D5 D6 D7 D8 D10

D12 D13 Q1 Q2 Q4 Q6 Q7 Q8

(W314)

RIDL2_N RIDL2_P

(CB75)

(CB71)

INR+ AGND INR-

RSP_P RSP_N

(W101A, W101B)

D101 D102 D103 D104 D105 D106 D107 D108 H3 H3 G3 H4 H4 D5 E5 D4 D109 D115 D124 IC102 Q101 Q102 Q103 Q104 D4 G3 H4 F3 H4 G4 I7 H4 Q105 Q106 Q107 Q108 Q109 Q110 Q115 Q116 G3 H4 G4 G4 G4 G4 D5 D5 Q117 Q122 Q123 Q124 Q125 Q132 Q148 Q149 B5 C4 C4 B5 B5 G3 H3 H3

MAIN (4) P.C.B. (Side A)

+5M MG THMR HPRRDR PRIR PRDR

(CB405)

W103 CB64

(W303A-W303D)

MAIN (1) P.C.B. (Side B)

MAIN (4) P.C.B. (Side B)

D122 F4 C4 D5 D5

D123 Q114 Q118

MAIN (1) MAIN (3)

+B4 +B3

(W103)

(W304A-W304D)

-B3 +PB AGND AGND

(W315)

RIDL2_N

(CB55)

INLAGND INL+

FUNCTION 3/3

Page 61 D9 to FRONT (14)_W8A, W8B (R, L models)

2P 600mm

W11A W11B
To POWER TRANSFORMER (U, C, T, K, A, B, G, J models)

5.0 6.5 3.3 6.5 3.3

6.5 5.5.1 5.0.0 5.5.1 5.1

7.6 7.6 7.9 3.2

8.2 7.6 7.6 8.2 9.5 8.9 7.0 7.6 7.6 8.2 0

7.6 3.3

0.8 7.0 AC8.6

to FRONT (1)_CB501

C3036 C3037 C3041 C3042 R3044 R3050 C4049 C4050 C4051 C4052 C4053 C4054 C4093 C4094 C4114 C4115 C4127 C4128 C4233 C4234 C4108 C4110 IC404 IC405 IC406 R4072 R4164

UR05810 100/35

UR25747 47/35
V807090 1P100 WK04180 10/16
HF35510 1/2P100 WM09800 4.7/16

to MAIN (3)_W317

19.5 19.1.3 0

0 AC29.8 4.9

UU23710 10/16 YA089A0 LME49723MA V807090 1P100
WM09800 4.7/16 X5482A0 NE5532DR HF35510 1/2P100

To POWER TRANSFORMER

11.9 11.-12.-12.0 -19.4 12.1

to FUNCTION (1)_CB302

to FRONT (13)_CB79
IC51: NJM7812FA Voltage regulator
IC52: NJM7912FA Voltage regulator

COMMON

R1 Q3 Q4 Q10 D1 D2 R2 R3 Q5 Q15 Q14 Q16 Q25 Q20 R13 Q23 R5 R6 R10 Q9 Q1 Q19 C1 Q18 R11 R12 C2 Q24 R20 R14 C3 D3 R17 Q21 Q22 Q12 Q11 Q13 R24 R22 R23

R21 R15 R16 R19

F6 to MAIN (2)_CB75

MAIN (4)

0.9 5.1

C5 to MAIN (1)_CB52

56.5 0

Idling adjustment

54.9 54.54.4

AC82.6

54.4 52.4 52.4 53.9

-31.8 31.9 0

to FRONT (12)_W101A, W101B
53.0 52.4 52.4 0.7 0.7 52.4 52.53.6 7.0 7.0 7.0 6.4 -49.8 -50.4 1.9 -43.0 -43.2 -1.7 1.7 0.0.0 0.7 0.7 10.4 54.9 54.9 53.0

to FRONT (11)_CB34

54.9 0.6

AC48.1

to FUNCTION (3)_CB25 To POWER TRANSFORMER To POWER TRANSFORMER

CB26 W317

AC35.1

to FUNCTION (2)_CB405 M2

6.4 1.7

-43.0 -43.0

-43.2 -43.2 1.7 1.7

-43.7 -43.8

1.7 -43.9 -45.4 1.7 1.7

Ground point

-56.4 -44.5 -44.9
-44.9 -45.5 1.7 1.7 1.5 1.7

-45.9 23.0

-44.5 -45.4

-45.5 -45.9

1.7 1.5 1.7 -45.6 -45.7 1.5 1.6

-44.9 -45.5 54.9

-45.9 -45.5 54.9

-45.5 -45.4 -45.6 -45.7

W304C CB57 CB58 W303C

DC47.2 0

0 DC46.9

3.7 -23.3.2 0.6 0.6

23.4 23.4

-15.5 -15.5

W304B W304A

DC46.9

DC47.2

M2 to MAIN (3)_W314

F1 to MAIN (1)_CB55
-18.8 5.1 5.1 -17.5 5.5.1 -16.2 5.1 5.1 -18.3

to FRONT (1)_CB521

MAIN (5) 6

-17.5 -45.1

-18.3 -45.2

-45.4 -46.3 -46.3

54.8 54.7 0

54.4 52.4 52.4 54.4 53.8

53.5 53.0 53.0 52.4 0.6 0.6 0.0.7 6.2 6.7 6.7 6.2 -49.7 53.5 -50.3 1.7 -42.9 -43.0 52.4 53.0
to FRONT (13)_W201A, W201B

CB84 CB79 CB80

10.4 54.8 0.0.54.8

0.6 52.4 52.4

to FUNCTION (2)_CB406

1.7 0.2 6.2 1.6

1.6 1.7

1.5 -42.9 1.5 54.8 1.7

-43.5 -43.8
-44.4 1.7 -44.4 -44.9 1.7
-44.9 -45.5 1.7 1.7 1.5 1.7 -45.6
-44.9 -45.5 1.7 1.5 1.5 1.7 -45.5 44.9 -45.5 -45.5 -45.6 -45.6 54.7 -45.4 1.7 1.7 1.5 1.6 -45.6

-44.9 -45.5

-45.9 -45.6
IC102, 202: LM61CIZ Temperature sensor

9 MAIN (2)

CB72 CB74
Note) Those parts marked with # are not included in the P.C.B. assy. Safety measures Some internal parts in this product contain high voltages and are dangerous. Be sure to take safety measures during servicing, such as wearing insulating gloves. Note that positions indicated below are dangerous even after the power is turned off because an electric charge remains and a high voltage continues to exist there. Before starting any repair work, perform discharge by connecting a discharge resistor (5k-ohms/10W) between terminals at following positions. The time required for discharging is about 30 seconds. 1. C308 on MAIN (3) P.C.B. 2. C309 on MAIN (3) P.C.B. 3. C335 on MAIN (3) P.C.B. 4. C336 on MAIN (3) P.C.B.
1. MAIN 2. MAIN 3. MAIN 4. MAIN
P.C.B. P.C.B. P.C.B. P.C.B.

FRONT 1/3

POINT A-1 XL501 (Pin 23 of IC502) POINT A-/ Pin 1, 2 / Pin 3 of CB501

Writing port

CB501 (+5V) 1 CB501 (/RES) 2

FRONT (9)

POWER ON INPUT indicator

POWER OFF

POWER ON
TUNER PHONO LINE 1 LINE 2

5.0 5.0 5.0 5.0

MAIN AUDIO DIRECT MUTE

5.0 5.0

FRONT (4)

12.0 0.8

0.6 0.8 0.6 12.0

FRONT (6) FRONT (3)

0.3 0.5 1.8 2.6 2.2.6 2.8 2.4 3.0 0.7 1.0.7 0.7 5.0 5.1 0.5 0.5 1.3 1.3 1.0 1.3 5.0 2.3.9 0

W5003A

4.0 5.0

5.0 1.5 0

3.0 2.4 2.8

5.1 5.1 5.1 0.2 5.0

1.8 1.0 1.3

0 12.0 5.6 4.9 5.0 5.0 0

3.9 5.1 5.0 5.0 0

W5005A

to FUNCTION (3)_W1

W5009A W5009B

IC501: TC74HC4051AFEL 8-channel analog multiplexer/demultiplexer
Logic Level Converter OUTC IN COM 6 OUTC IN 2 COM 5 INH 6 VEE 7 GND Vcc 11 A 10 B 9 C

W5007A

W5007B

TREBLE +/-

BASS BALANCE +/L/R

5.8 7.5.1 5.8 5.0

IC503: LB1641 Motor driver

OUT 1 OUT 2 VCC 2 P1 P2

4.3 3.6 4.3 0
IC505: RH5RE58AA-T1-FA Voltage regulator

VIN VOUT

12.0 12.11.9 11.-12.0 -12.-12.1 -12.1 12.0 11.9 12.0

to FUNCTION (2)_W4004

PRE DRIVER

+ Vref 1 GND

IN 1 5

INPUT LOGIC

12.0 12.0 12.0

11.9 11.0 -12.11.9

0 -12.1

11.9 -12.-12.0 -12.1

0 5.1 5.0

to FUNCTION (1)_W3004

IC504: LC709004A-TLM-E I/O-expander for microcontroller

Control logic

Serial/parallel converter/shift register

14 DOUT 15 VDD 19 VSS

CLK# 3 CS# 4

RES# 21

I/O control/output register

12.0 5.7 5.7

OFF A B A+B

5.0 5.3

port 0 I/O buffer

port 1 I/O buffer

to MAIN (2)_W203

5.3 5.0

IC502: M38039xxxxx Single chip 8-bit microprocessor

5.0 -12.0

Main clock input XIN 30
Main clock Sub-clock Sub-clock output input output XOUT XCIN XCOUT 29

Reset input RESET 27

5.3 -12.1 5.0 -12.0
MICROPROCESSOR Clock generating circuit RAM ROM A X Prescaler 12 (8) Prescaler X (8)
Timer 1 (8) Timer 2 (8) Timer X (8) Timer Y (8)

to FUNCTION (2)_W4005

S PCH PCL PS

Prescaler Y (8)

Timer Z (16)

FRONT 2/3

to FRONT (11)_CB27

20.9 0.6 0

25.7 0.6 0.6 0
24.6 24.7 24.6 24.2 0.8 0.8 25.7 0.8 0.2 -20.7 -25.-0.0.5 0.5 25.2

10.6 0.0.6

10.6 0.6 0

5.4 5.5 0.1 0.1 -0.1

0 -0.5 -0.5 -0.5 -10.5

0 -0.5

0 -0.0.7 -0.5 -10.5 -10.5 -0.7 24.2 -24.7

-24.7 -25.2

Page 55 B3

to FUNCTION (1)_CB301

-24.6 -24.7 -24.2 -10.5 -10.5 -10.5 -10.5 -25.3 -0.-0.-0.-0.-0.7 -0.1 0.1 0.5.0.6 0.6 10.6 10.0.6 10.0.6 24.2 10.6 0.7 24.7 25.2 24.7 24.4 25.1 0.7 -11.8 -11.6.0 6.0 0.2 24.6 0.7 25.7 6.0 5.5 0.-11.8 11.9 -0.7

Note) Those parts marked with # are not included in the P.C.B. assy. /

16 (14)

8-15 8-11 8-11 8-33 8-33 8-37 8-23 8-35 8-16 8-37 8-(13) 8-34 8-33 8-33 8-36 K, B, G, L models

15 (1)

16 (10)

8-22 8-(12)

I REMOTE CONTROL
RAS21 (U, C, R, T, A, B, G, L models) / RAS12 (K, J models)

SCHEMATIC DIAGRAM

RAS21 (U, C, R, T, A, B, G, L models) SC73P1601MC-AA45 RAS12 (K, J models) SC73P1601MC-AA55

PANELS

RAS21 (U, C, R, T, A, B, G, L models) RAS12 (K, J models)
R1 3.3 ohms C1 + 47uF/10V C4 0.1uF 1 IR-LED IR1 VDD 20

19 K32 K24 K16

R2 Kohms Q1 KTC8050S K31 K23 K15 K7

4 C2 C3 X1 3.84MHz 5

17 K30 K22 K14 K6

16 K29 K21 K13 K5

15 K28 K20 K12 K4

14 K27 K19 K11 K3

13 K26 K18 K10 K2

12 K25 K17 K9 K1

KEY LAYOUT

KEY CODE

RAS21 (U, C, R, T, A, B, G, L models)
No. Customer code 7A85 7A85 7A85 7A85 7A85 7A85 7A85 7D82 7A85 7D82 7A85 7D82 Data code 12ED 10EF 11EE 0AF5 0BF4 09F6 08F7 8D72 A35C 946B A25D 8E71 Function A/B/C/D/E PRESET H (+) PRESET G (-) Y (SKIP+) T (SKIP-) D/A (PAUSE/STOP) W (PLAY) VOL+ INPUT Q MUTE INPUT W VOL-

RAS12 (K, J models)

No. Customer code 7986 7986 7986 7986 7986 7986 7D82 7A85 7D82 7A85 7D82 Data code 01FE 07F8 04FB 56A9 55AA 02FD 8D72 A35C 946B A25D 8E71 Function OPEN/CLOSE Y (SKIP+) T (SKIP-) A (PAUSE) D (STOP)

W (PLAY)

VOL+ INPUT Q MUTE INPUT W VOL-