Sony HST-SE581 Service Manual

HST-SE581
SERVICE MANUAL
This set is the tuner deck and amplifier
section in SEN-T481.
Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” and the double-D symbol a and “PRO LOGIC” are trademarks of Dolby Laboratories Licensing Corporation.
Tape deck Model Name Using Similar Mechanism HST-471 Section Tape Transport Mechanism Type TCM-220WR2
SPECIFICATIONS
AEP Model
E Model
Australian Model
Tuner section
FM stereo, FM / AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0 MHz Antenna FM leadantena Antenna terminals 75 unbalanced Intermediate frequency 10.7 MHz
AM tuner section
Tuningrange European model: 531 – 1,602 kHz Other models: 531 – 1,602 kHz (with the interval set at
9 kHz) 530 – 1,710 kHz (with the interval set at 10kHz)
Antenna AM loop antenna, outdoor antenna
terminals
Intermediate frequency
450 kHz
Amplifier section
European models:
(FRONT) DIN power output 90 + 90 W
(at rear / center / woofer off at 1 kHz, 8 )
Continuous RMS power output
110 + 110 W (at rear / center / woofer off at 1 kHz, 10% THD, 8 ) 70 W / ch (at SURROUND ON at 1 kHz, 10% THD, 8 Ω)
(REAR) 40 W
(at front / center / woofer off at 1 kHz, 8 )
(CENTER) 40 W
(at front / rear / woofer off at 1 kHz, 8 )
(WOOFER) 70 W
(at front / rear / center off at 40 Hz, 4 )
Other models:
Peak music power output
1,600 W (total) (FRONT) Continuous RMS power output
90 + 90 W
(at rear / center / woofer off at 1 kHz,
10% THD, 8 Ω) (REAR) 40 W
(at front / center / woofer off at 1 kHz, 8 ) (CENTER) 40 W
(at front / rear woofer off at 1 kHz, 8 ) (WOOFER) 70 W
(at front /rear/ center off at 40 Hz, 4 )
Inputs PHONO (phono jacks):
sensitivity 2.5 mV, impedance 50 k CD (phono jacks): sensitivity 400 mV, impedance 50 k VIDEO1, 2 (phono jacks):
sensitivity 250 mV, impedance 50 k
— Continued on next page —
CASSETTE DECK RECEIVER
MICROFILM
TABLE OF CONTENTS
Outputs VIDEO1 (phono jacks):
voltage 250 mV, impedance 1 k
PHONES (stereo phone jack):
accepts low and high impedence headphones
Tape deck section
Track method 4-track, 2-channnel stereo
Frequency response With DOLBY NR set to OFF TYPE-I tape: 60-13,000 Hz, ± 3 dB TYPE-II tape: 60-14,000 Hz, ± 3 dB
General
Power requirements European, Singapore and Malaysian models:
230 V AC, 50 / 60 Hz Australian model: 230 V AC, 50 Hz E model: 110 – 120 V AC or
220 – 240 V AC, 50 / 60 Hz
(selectable) Power consumption 220 W Dimensions (w/h/d) Approx. 430 × 330 × 355 mm Mass Approx.10.5 kg Supplied accessories: Remote RM-U581 (1)
Batteries (2)
AM loop antenna (1)
FM lead antenna (1)
Design and specifications are subject to change without notice.
1. GENERAL ·········································································· 3
2. TEST MODE ······································································ 5
3. MECHANICAL ADJUSTMENTS ······························ 6
4. ELECTRICAL ADJUSTMENTS ································ 6
5. DIAGRAMS
5-1. Circuit Boards Location ····················································· 9 5-2. Block Diagram ································································· 11 5-3. Schematic Diagram — Main Section (1/2) — ················· 13 5-4. Schematic Diagram — Main Section (2/2) — ················· 15 5-5. Printed Wiring Board — Main Section — ······················· 17 5-6. Printed Wiring Board — Display Section — ··················· 19 5-7. Schematic Diagram — Display Section — ······················ 21 5-8. Printed Wiring Board — SW Section —·························· 23 5-9. Schematic Diagram — SW Section — ···························· 25 5-10. Printed Wiring Board — Power Amp Section —·············27 5-11. Schematic Diagram — Power Amp Section — ··············· 29 5-12. Printed Wiring Board — Deck Section — ······················· 31 5-13. Schematic Diagram — Deck Section —·························· 33 5-14. Printed Wiring Board — Power Transformer Section —·35 5-15. Schematic Diagram — Power Transformer Section — ··· 37 5-16. IC Block Diagrams··························································· 39 5-17. IC Pin Function ································································ 41
6. EXPLODED VIEWS ······················································ 43
MODEL IDENTIFICATION
— Model Number Label —
MODEL IDENTIFICATION
MODEL NO. HST-SE581
CASSETTE DECK RECEIVER
AEP, Singapore,
Malaysia : AC 230V ~ 50/60Hz 220W
Australian : AC 230V ~ 50Hz 220W
E : AC 1 10-120V , 220-240V selectable
~ 50/60Hz 220W
7. ELECTRICAL PARTS LIST·······································47
SAFETY-RELATED COMPONENT W ARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.
— 2 —
LOCATION AND FUNCTION OF CONTROLS
[FRONT PANEL]
SECTION 1

GENERAL

@• @¶
@∞
1
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2
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@™
3
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45678
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9
0
!™
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!∞
!•
1 10 KEY 2 MEMORY 3 SURROUND MODE (DOLBY/HALL/SIMULATED) 4 CONTROL MODE (–/+) 5 CONTROL MODE (TONE/CENTER/REAR/WOOFER) 6 MEMORY SCAN 7 STEREO/MONO 8 TUNING (–/+) 9 BAND 0 MASTER VOLUME !¡ WOOFER ON/OFF !™ DIRECTION (DECK B) !£ DOLBY NR (DECK B) !¢ DUBBING SPEED (HIGH/NORMAL) (DECK B) !∞ REC (PAUSE/REC MUTING/REC) (DECK B)
!§ ) (DECK B) !¶ · (DECK B) !• ª (DECK B) !ª p (DECK B) @º 0 (DECK B)VIDEO 1/VIDEO 2/TAPE/CD/TUNER/PHONO @™ · (DECK A) @£ ª (DECK A) @¢ p (DECK A) @∞ 0 (DECK A) @§ ) (DECK A)SOUND FIELD
(1 ROCK/2 POPS/3 CLASSIC/4 MOVIE/5 GAME)
@• CENTER MODEPOWER 1/u
— 3 —
[REAR PANEL]
#™
r
r
r
r
Photo : AEP Model
ANTENNA terminalPHONO jack #™ CD/VIDEO 1/VIDEO 2 jackSPEAKER terminal
— 4 —
SECTION 2

TEST MODE

[Fluorescent Indicator Tube, LED All Lit, and Ke y Check Mode]
1. When the plug is inserted into the outlet while pressing the MEMORY SCAN button, the fluorescent indicator tube and LED will light up completely.
2. The mode changes as follows each time the BAND button and WOOFER ON/OFF button are pressed together after 1.
Sequence of Service Modes
Fluorescent Indicator Tube and LED Check Mode
Press the BAND button and
*1
WOOFER ON/OFF button at the same time.
Destination display mode
Press the BAND button and
*2
WOOFER ON/OFF button at the same time.
KEY check mode
*3
Press the BAND button and
WOOFER ON/OFF button at the same time.
AMP check mode
*4
Press the BAND button and
WOOFER ON/OFF button at the same time.
*1 For checking if the fluorescent indicator tube and LED are lit
completely
*2 Model name and destination are shown in the destination display
mode.
*3 When the KEY check mode is set, “KEY 0”is displayed on the
fluorescent indicator tube. Each press of the button is counted. (This excludes the 1/u button) Buttons pressed once will not be counted when pressed again. When all keys are pressed, “KEY END” appears.
*4 When the AMP check mode is set, “AMP” is displayed on the
fluorescent indicator tube. Select any desired mode by pressing the TONE or CENTER or REAR or WOOFER button. After a mode is selected, press any of the DOLBY or HALL or SIMULATED button as shown below to change the amplification level.
TONE
CENTER
REAR
WOOFER
DOLBY
–10 dB –15 dB –15 dB –24 dB
HALL
0 dB 0 dB 0 dB 0 dB
SIMULATED
+10 dB
+6 dB +6 dB +8 dB
[TC test mode]
1. Insert a playback tape into the deck A and a record tape into the deck B.
2. While the power cable is disconnected from AC outlet, press the 1/u switch.
3. While pressing the DUBBING SPEED HIGH button, connect the power cable to the AC outlet.
Operation
Audio dubbing from deck A to Deck B starts. When the 0 button or the ) button (during reverse recording) of the deck B is pressed during dubbing, the tape returns to the recording start point and playback starts. When the DUBBING SPEED HIGH button is pressed during dubbing, the high speed dubbing is performed.
[TC aging mode]
1. Turn on the main power.
2. Press the TAPE button. Insert a playback tape into the deck A and a record tape into the deck B.
3. Set the DIRECTION switch to .
4. Press the WOOFER and p (STOP) button of the deck A at the same time to enter the aging mode.
Operation
Deck A rewinds (REW) up to the tape top, Deck B rewinds (REW) up to the tape top, Deck A plays back (FWD) for one minute, then stops (STOP) momentarily, Deck A plays back (FWD) for three minutes, Deck A runs in fast forward (F. FWD) up to tape end, Deck A plays back (REV) for one minute, then stops (STOP) momentarily, Deck A plays back (REV) for three minutes, Deck A runs in fast reverse (REV) up to tape top, Deck B plays back (FWD) for one minute, then stops (PAUSE) momentarily,
<Repeat>
Deck B records (FWD. RECORD) for three minutes, Deck B runs in fast forward (F. FWD) up to tape end, Deck B plays back (REV) for one minute, then stops (PAUSE) momentarily, Deck B records (REV. RECORD) for three minutes, Deck B runs in fast reverse (REV) up to tape end,
These operations are repeated.
5. How to exit the TC aging mode. Press any keys related to the TC deck.
3. To exit the test mode, press the 1/u button, or press the p (STOP) button of the deck A during the modes except the key check mode.
— 5 —
[Backup Clear Mode]
1. While pressing the DOLBY key, connect the power cable to the AC outlet. All preset data is cleared.
SECTION 3
set
rear panel
VIDEO1 AUDIO OUT connector (L: L-CH) (R: R-CH)
+ –
level meter
test tape P-4-A100 (10 kHz, –10 dB)

MECHANICAL ADJUSTMENTS

SECTION 4

ELECTRICAL ADJUSTMENTS

PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab:
record/playback head pinch roller erase head rubber belts capstan idlers
2. Demagnetize the record/playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the parts adjusted.
5. The adjustments should be performed with the rated power supply voltage unless otherwise noted.
• Torque Measurement
Mode Torque Meter Meter Reading
Forward CQ-102C Forward
Back Tension (0.026 to 0.082 oz•inch)
CQ-102C
Reverse CQ-102RC Reverse
Back Tension (0.026 to 0.082 oz•inch)
CQ-102RC
FF, REW CQ-201B
36 to 61g•cm
(0.50 to 0.84 oz•inch)
2 to 6g•cm
36 to 61g•cm
(0.50 to 0.84 oz•inch)
2 to 6g•cm
61 to 143g•cm
(0.85 to 1.98 oz•inch)
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.)
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 test mode. (While pressing the DUBBING SPEED HIGH button, insert the AC outlet.)
Test Tape
Tape Signal Used for
P-4-A100 10 kHz, –10 dB Azimuth Adjustment
WS-48B 3 kHz, 0dB Tape Speed Adjustment
P-4-L300 315 Hz, 0dB Level Adjustment
• Tape Tension Measurement Mode Tension Meter Meter Reading
Forward CQ-403A
Reverse CQ-403R
more than 100 g
(3.53 oz•inch)
more than 100 g
(3.53 oz•inch)
Record/Playback Head Azimuth Adjustment
DECK A DECK B
Note : Perform this adjustments for both decks. Remove the covers
of cassette holders.
Procedure:
1. Mode: Playback (FWD)
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
output level
within 1dB
L-CH peak
R-CH peak
within 1dB
Screw position
L-CH peak
R-CH
Screw position
peak
— 6 —
3. Mode: Playback (FWD)
r
(
)
(
)
test tape P-4-A100 (10kHz, –10dB)
rear panel
L
set
R
VIDEO1 AUDIO OUT connector
oscilloscope
V
H
Tape Speed Adjustment DECK A
Note: Start the Tape Speed adjustment as belo w after setting to the
test mode.
Procedure:
Mode: Playback (FWD)
test tape WS-48B (3 kHz, 0 dB)
rear panel
set
frequency counter
+ –
waveform of oscilloscope
in phase 45°90°135°180
good
°
wrong
4. Repeat steps 1 to 3 in playback (REV) mode.
5. After the adjustments, apply suitable locking compound to the pats adjusted.
Adjustment Location: Record/Playback Head (Deck A and B).
Fowerd
side
Adjustment screws
Reverse
side
VIDEO1 AUDIO OUT connector (L: L-CH)
R: R-CH
1. Insert the WS-48B into the deck A and the blank tape into the deck B.
2. Press the REC button and · button on the deck B. Then the deck B is at recording mode.
3. Set the deck A to playback mode.
4. Press the DUBBING SPEED HIGH button in playback mode. Then at high speed mode.
5. Adjust RV652 on the A UDIO board do that frequenc y counter reads 6,000 ± 180 Hz.
6. Press the DUBBING SPEED NORMAL button in playback mode. Then at normal speed mode.
7. Adjust RV651 on the A UDIO board so that frequency counter reads 3,000 ± 90 Hz.
8. Frequency difference between deck A and deck B the beginning of the tape should be within ± 1.5 %.
Adjustment Location: AUDIO board
Sample Value of Wow and flutter
W.RMS (JIS) within 0.3% (test tape: WS-48B)
Playback level Adjustment DECK A DECK B
Procedure:
Mode: Playback (FWD)
test tape P-4-L300 (315 Hz, 0 dB)
rear panel
set
VIDEO1 AUDIO OUT connector (L: L-CH)
R: R-CH
level mete
+ –
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:
VIDEO1 AUDIO OUT 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
— 7 —
r
(
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Record bias Current Adjustment DECK B
r
(
)
Procedure:
1. Mode: Record
AF OSC
VIDEO 1 IN connector (L: L-CH)
1) 315 Hz
2) 10 kHz
attenuator
(R: R-CH)
50 mV (–23.8 dB)
 
600
rear panel
set
blank tape CS-123
2. Mode: Playback
recorded portion
rear panel
set
VIDEO1 AUDIO OUT connector (L: L-CH)
R: R-CH
level mete
+ –
Confirm playback the signal recorded in step 1 become adjustable limits as follows. If these levels do not adjustable limits, adjustment the RV341 (L­CH) and R V441 (R-CH) on the AUDIO board to repeat steps 1 and 2. Adjustable limits: Playback output of 315 Hz to playback output
of 10 kHz: ±0.5 dB
Adjustment Location: AUDIO board
Record Level Adjustment DECK B
Procedure:
1. Mode: Record
AF OSC
VIDEO 1 IN connector (L: L-CH) 315 Hz, 50 mV (–23.8 dB)
attenuator
600
(R: R-CH)
blank tape CS-123
rear panel
set
Adjustment Location [MAIN BOARD] (Component Side)
IC302
J101
RV511 RECORD LEVEL
J102
CN301 CN302
(L-CH)
RV521 RECORD LEVEL (R-CH)
[AUDIO BOARD] (Conductor Side)
RECORD
BAIS
RL RV301 RV401
PB LEVEL
L
RV441RV341
R
— DECK B —
IC501
TAPE SPEED
(NORMAL)
RV651
PB
LEVEL
— DECK A —
CN102
RV311 RV411
CN501
CN502
(HIGH) RV652
L
R
2. Mode: Playback
recorded portion
rear panel
set
VIDEO1 AUDIO OUT connector (L: L-CH)
R: R-CH
level mete
+ –
Confirm playback the signal recorded in step 1 become adjustable limits as follows. If these levels do not adjustable limits, adjustment the RV511 (L­CH) and R V521 (R-CH) on the main board to repeat steps 1 and 2.
Adjustable limits:
VIDEO 1 AUDIO OUT level: 47.3 to 53.1 mV
(–24.3 to –23.3 dB)
Adjustment Location: MAIN board
— 8 —
5-1. CIRCUIT BOARDS LOCA TION
DISPLAY BOARD
SECTION 5

DIAGRAMS

AC BOARD
TEN KEY BOARD
SUB HP BOARD
HP BAORD
SECONDARY BOARD
DECK A BOARD
LEAF SWITCH BOARD
MOTOR BOARD
PRIMARY BOARD
TUNER UNIT
MAIN BOARD
POWER BOARD
AUDIO BOARD
DECK B BOARD
— 9 —
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMA TIC DIAGRAMS. (In addition to this necessary note is printed in each block.)
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
• All resistors are in and specified.
% : indicates tolerance.
¢
2 : nonflammable resistor.
1 : fusible resistor.
C : panel designation.
Note: The components identified by mark ! or dotted line
U : B+ Line.
V : B– Line.
H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• Voltages are taken with a VOM (Input impedance 10 M).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Abbreviation
: internal component.
with mark ! are critical for safety. Replace only with part number specified.
under no-signal (detuned) conditions. Voltage variations may be noted due to normal production
tolerances.
F : FM g : VIDEO/MD E : PB (DECK A) a : PB (DECK B) G : REC (DECK B) J : CD c : VIDEO-1 AUDIO I : VIDEO-2 AUDIO
AUS : Australian model. MY : Malaysia model. SP : Singapore model.
1
4
/
W or less unless otherwise
Note on Printed Wiring Board:
X : parts extracted from the component side.
b : Pattern from the side which enables seeing.
• Waveforms
– MAIN SECTION –
1
IC300 (OSC)
4.0Vp-p
8.0 MHz
– DISPLA Y SECTION –
2
IC701 (X2)
5.0 MHz
5.6Vp-p
— 10 —
HST-SE581
5-2. BLOCK DIAGRAM
TUNER UNIT
TU L
DO
DI
CL
CE
MUTE
STEREO
TUNED
POWER AMP
13 14 15
6
1
9
7
1

IC151

VCC VCC VEE
IN
MUTE
WOOFER

IC651

VCC
VEE
IN

Q153

Q653

BOOSTER

Q151

BOOSTER

Q152

BOOSTER

Q651

BOOSTER

Q652

CURR DET

Q155

CURR DET

Q670

PROTECTOR Q191,192,291
Q261Q261
RELAY DRIVE

Q161

RELAY DRIVE

Q351

RELAY DRIVE

Q661

RELAY DRIVE

RY251

RY151

RY351

RY651

+VE
2
LIMITER

Q154

NF
5
LIMITER
-VE
3
+VE
6
LIMITER

Q654

NF
2
LIMITER
-VE
5
H.P.F IC602
MUTE Q602
VCC
MUTE Q921

IC351

IC451

+24V
-24V
VEE
LV CE1 FV DATA FV CLK
SURROUND
VOL CONT
LVR IN33
12
RF IN
18
CE
17
DI
16
CL

IC401

RF OUT
Q449 LINE
MUTE
L OUT
23
MUTE Q131
13
MUTE Q331
MUTE Q431
BOOST
L.P.F
37Hz

IC601

IC602

Q603

PHASE
DET
SURROUND
PROCESSOR
61
53 51 54 50 52 49

IC300

LT IN
DATA DATA CLK CLK ENABLE1 ENABLE2
46 47
X301 8MHz
L OUT
C OUT
S OUT

Q330

10dB
MUTE
24

IC303

31
MUTE Q332
IC303
33
MUTE Q432

IC601

FUNCTION

IC302

DOLBY NR
A
41
39
B
EQ OUT
32 25
NORM
24
CROM
13
A120/70 NORM/
15
CROM/ METAL

IC501

120
70
34
33
RV511
REC
LEVEL
S771
NR
OFF
ON
+5V
B NR
NR ON/OFF
18
PB OUT
REC IN
BIAS ON/OFF16LM ON/OFF20PB A/B
12
NORM/HIGH14R/P PASS
19
35
37
PHONO
CD
VIDEO 1
AUDIO IN
VIDEO 2
AUDIO IN
VIDEO 1
AUDIO OUT
J101-1

J101-2

J102-1

J102-2

J101-3

IC301
2
1
3
5
7
6
10
LEVEL SHIFT
CONTROL
F CE
1413 15
FV DATA
FV CLK
4
LV DATA
LV CLK
LV CE1 LV CE2
8
11
R CH
R CH

TM151

TM351

L
FRONT
SPEAKER
R
CENTER
SPEAKER
L
REAR
SPEAKER
R
SUPER
WOOFER

J781

J701
PHONS
MECHANISM BLOCK
A-PB (L) B-PB (L)
B-REC (L)
BIAS
II A­II B-
TRG (+)
TRG(-)
CAP.M (H/L)
CAP.M (-)
TC RELAY
A HALF B HALF A SHUT
B SHUT (A-STOP) A PLAY (B-STOP) B PLAY
16
MOTOR DRIVE
2
TRG(+) TRG)-)
10

Q531

H/L
SWITCH

Q532

ON/OFF SWITCH
Q951,952
+12V REG

IC502

VZ
4
B TRG
Q533,534
SWITCH
UNREG +12VCAP.M (+)

Q701

POWER
SWITCH

Q709

DRIVE
67
21
P RELAY
PWR MECH SW
GR1,2,6-9,11,12
SEG1-4
F1
STANBY
47
S/W M ON/OFF
DI
CL
CE
DO
MUTE
TUNED
STEREO
2
3
4
6
7
8
5
62
50
60
61
37
ST DI
STCE
ST DO
ST TUNED
ST CLK
ST MUTE
ST STEREO
52
5A TRG 6
H/L
TC A TRG
51
TC B TRG
59
TC TRG H/L
57
TC CAP.M H/L
58
TC CAP.M ON/OFF
56
TCRELAY REC/PB
55
TC A HALF
26
TC B HALF
27
TC A SHUT
28
TC B SHUT
54
TC A PLAY
53
TC B PLAY
TC A/B
TC LM ON/OFF
TC BIAS ON/OFF
X2
X1
11
12

X701

5 MHz
TC NORMAL/HIGH
19
FUNC CE
TC REC/PB PASS
SIRCS
38

IC702

REMOTE CONTROL RECEIVER
+5V
FV CLK
LV DATA
FV DATA
18
17
42
LV DATA
FUNC CLK
FUNC DATA
SYSTEM CONTROL

IC701

LV CLK
LV CE1
41
43
LV CLK
LV SUR CE
VOL A15VOL B
VOL
ENCODER

RV701

LV CE2
68
44
69
49
68
64
24
23
22
66
36
36
PHASE
LV VOL CE
9
IC MUTE
LINE MUTE
10dB MUTE
F2
FLUORESCENT INDICATOR TUBE
PROTECTION
SEG1-18 GR1-12
FLUORESCENT LAMP
45
H.P RY
S/W RY
SUR RY
FRONT RY
H.P SENCE

FL701

LED

D801

POWER
48
PLOG LED
KEY 1
KEY 3
KEY 3
KEY 4

S701

OFF
10RESET
39POWER SENCE
32
31
30
29
ON

Q702

LED
DRIVE

Q703

LED
DRIVE

Q704

RESET
SWITCH
S702-704
S721-736
S741-751
GR11
GR11
GR12
GR6
GR7
GR1
GR2
GR8
GR9
+15V

RY451

Q451

RELAY
2 1
2 3
SEG1
Q956,957
+10V
REG

IC951

+7.5V
REG

IC952

-7.5V REG
MOVIE

Q710

DRIVE
-26V(VFDP)
UNREG +15V

D815

GAME
RECT

D951

RECT

D961

RECT
D957-960

Q954

-26V REG

D803

D802

SUPER
WOOFER

D805

RESET
S705-713
+5V

IC703

D804

DOLBY
PLO LOGIC

D702

13
D+5.6V
VCC VEE
+24V
-24V
+10V
+7.5V
-7.5V
DECK B DECK A
PAUSE REC
REC
SEG2

S772

HIGH NORMAL

Q711

S752-756

D811

D812 D814

ROCK
POPS

D813

CLASSIC
S761-770

D756

D756 D756
D755 D754 D753 D752 D751D751 D821 D822
Q718,719
+5V
Q716,717
Q714,715
Q720,721
SEG4

Q713

Q712

SEG3
+15V
+5.6V
+5.6V
Q901
RELAY DRIVE
F955 F956

F951

F952 F953

F954

F1 F2
Q902 +5.6V
REG

T901

RY901

D901-904
RECT
F902 F903
E MODEL

T901

EXCEPT E MODEL
E MODEL
S901
120V 240V
• RCH is omitted
• Signal Path
: TUNER/AUDIO
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
: CD
: VIDEO-1 AUDIO
: VIDEO-2 AUDIO
EXCEPT E MODEL

F901

E MODEL
EXCEPT E MODEL

J901

AC
OUTLET
AC IN
— 11 — — 12 —
5-3. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • See page 10 for Waveforms. • See page 39 for IC Block Diagrams.
HST-SE581
— 13 — — 14 —
HST-SE581
5-4. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • See page 39 for IC Block Diagrams.
— 15 — — 16 —
5-5. PRINTED WIRING BOARDS — MAIN SECTION — • See page 9 circuit boards location
HST-SE581
• Semiconductor
Location
Ref. No. Location

D618 J-8 D621 J-8 D951 I-3 D963 G-4 D964 H-6 D965 I-6

IC300 D-8 IC301 B-10 IC302 B-8 IC303 I-10 IC401 G-9 IC501 F-3 IC502 H-4 IC601 I-8 IC602 I-8 IC951 H-6 IC952 J-6

Q121 H-10 Q131 H-7 Q221 H-9 Q231 G-7 Q330 I-10 Q331 H-7 Q332 I-9 Q431 G-7 Q432 H-9 Q449 G-6 Q531 G-2 Q532 G-2 Q533 H-3 Q534 H-3 Q602 I-7 Q603 I-8 Q951 H-2 Q952 I-2 Q956 G-5 Q957 G-5

A
B
C
D
E
12
MAIN BOARD
F
345678910111213
TO
TUNER
UNIT
16
15
30
1
D
(Page 19)
64
65
80
1
24
22
21
42
1
41 40
25
1
4
5
8
R
PHONE
L
R
L
R
L
R
L
R
L
CD
AUDIO
OUT
AUDIO
IN
AUDIO
IN
VIDEO-1
VIDEO-2
J101
J102
H
(Page 32)
E
G
H
J
E
(Page 19)
E
E
E
E
E
E
E
E
I
(Page 31)
1
110
E
E
E
E
3
E
E
E
4
1
4
1
E
E
1
E
E
4
I
8
5
11
1-669-781-
(11)
16
8
1
3
12
C
1
B
5
(Page 28)(Page 27)
8
5
112
— 17 — — 18 —
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