Sony STR-V5550, STR-V7770 Service Manual
STR-V5550/V7770
MICROFILM
SERVICE MANUAL
This set is the tuner and amplifier
section in MHC-V5550/V7770AV.
Amplifier section
The following measured at AC 230V 50/60 Hz
DIN power output (Rated) (FRONT)
95 + 95W (6 Ω at 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 110 + 110W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 55W
(8 Ω at 1kHz, 10% THD) (V7770)
REAR SPEAKER: 35 + 35W
(8 Ω at 1kHz, 10% THD) (V7770)
The following measured at AC 120, 220, 240V 50/60Hz
DIN power output (Rated) (FRONT)
100 + 100W (6 Ω at 1kHz DIN)
Continuous RMS power output (Reference)
FRONT SPEAKER: 120 + 120 W
(6 Ω at 1kHz, 10% THD)
CENTER SPEAKER: 60W
(8 Ω at 1kHz, 10% THD) (V7770)
REAR SPEAKER: 40 + 40W
(8 Ω at 1kHz 10% THD) (V7770)
Peak music power output 2400W (V7770)
2000W (V5550)
Inputs MD/VIDEO 1 IN (phone jacks): voltage
450/250mV, impedance 47kΩ
AV INPUT AUDIO (phone jacks): voltage
250mV, impedance 47kΩ
MIX MIC 1/2 (phone jack): sensitivity 1mV,
impedance 10kΩ
Output MD/VIDEO 1 OUT (phono jacks): voltage
450/250mV, impedance 1kΩ
PHONES (stereo phone jack): accepts
headphones of 8Ω or more.
FRONT SPEAKER:
accepts impedance of 6 to 16Ω
CENTER SPEAKER:
accepts impedance of 8 to 16Ω (V7770)
REAR SPEAKER:
accepts impedance of 8 to 16Ω
SUPER WOOFER:
Voltage 1V, impedance 1kΩ
Photo : STR-V7770
SPECIFICATIONS
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range 87.5 – 108.0MHz
Aerial FM lead aerial
Aerial terminals 75Ω unbalanced
Intermediate frequency 10.7MHz
AM tuner section
Tuning range
Thai models: 531 – 1,602kHz (with the AM tuning
Other models: MW: 531 – 1,602kHz (with the MW tuning
Intermediate frequency 450kHz
Antenna AM loop antenna External antenna terminal
General
Power requirements
Chinese, Thai models: 220V AC, 50/60Hz
Other models: 120V or 220V or 230 – 240, 50/60Hz
Power consumption 300W
Dimensions (w/h/d) Approx. 288 × 205 × 375mm
Mass Approx. 8.8kg
Design and specifications are subject to change without notice.
E Model
Chinese Model
interval set at 9kHz)
530 – 1,710kHz (with the AM tuning
interval set at 10kHz)
interval set at 9kHz)
530 – 1,710kHz (with the MW tuning
interval set at 10kHz)
SW: 5.95 – 17.90MHz (with the SW tuning
interval set at 5kHz)
Adjustable with voltage selector
FM STEREO/FM-AM RECEIVER
TABLE OF CONTENTS
1. GENERAL ···········································································3
2. DISASSEMBLY
2-1. Sliding Panel Assembly······················································ 5
3. SERVICE MODE ······························································· 6
MODEL IDENTIFICATION
— BACK PANEL —
LABEL MODEL NUMBER
4. DIAGRAMS
4-1. Circuit Boards Location ··················································· 10
4-2. Block Diagrams
• Main Section ·································································· 11
• Power Section ································································ 13
4-3. Printed Wiring Board – Main Section – ··························· 17
4-4. Schematic Diagram
– Main (1/2) Section (V5550 Model) – ····························19
4-5. Schematic Diagram
– Main (1/2) Section (V7770 Model) – ····························21
4-6. Schematic Diagram – Main (2/2) Section – ····················· 23
4-7. Schematic Diagram – Power Amp Section – ··················· 25
4-8. Printed Wiring Board – Power Amp Section –·················27
4-9. Schematic Diagram – Display Section – ·························· 29
4-10. Printed Wiring Board – Display Section – ······················· 31
4-11. Schematic Diagram – Sliding Panel Section – ················· 33
4-12. Printed Wiring Board – Sliding Panel Section – ··············35
4-13. Schematic Diagram – Surround Amp Section –···············37
4-14. Printed Wiring Board – Surround Amp Section – ············39
4-15. Printed Wiring Board – Trans Section – ··························· 41
4-16. Schematic Diagram – Trans Section – ····························· 43
4-17. Schematic Diagram – AV/Mic Section – ·························· 44
4-18. Printed Wiring Board – AV/Mic Section –······················· 45
4-19. IC Block Diagrams ··························································· 46
4-20. IC Pin Function ································································ 49
5. EXPLODED VIEWS
5-1. Case and Sliding Panel Section ········································ 52
5-2. Front Panel Section ·························································· 53
5-3. Slide Mechanism Section ················································· 54
5-4. Circuit Boards and Back Panel Section ···························· 55
No.
MODEL PART No.
V5550:Hong Kong, Malaysia, Singapore,
Indonesia
V7770:Hong Kong, Malaysia, Singapore 4-900-848-6π
V7770:Thai, Chinese 4-900-848-7π
V5550:Chinese 4-900-848-8π
4-900-848-5π
6. ELECTRICAL PARTS LIST········································· 56
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY MARK ! OR DO TTED 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 —
Front Panel
SECTION 1
GENERAL
#¢
#£
#™
#¡
#º
@ª
@•
@¶
@§
@∞
@¢
@£
123 456
@¡
@™
!ª
@º
Photo : STR-V7770
!¶
!§
!∞
7
8
9
!º
!¡
!™
#∞
!£
!¢
#¶ #§!•
1 MOVIE button
2 MUSIC button
3 GAME button
4 PLACE button
5 P FILE button
6 EFFECT ON/OFF button
7 OPEN/CLOSE button
8 TUNER BAND button
9 STEREO/MONO button
!º MEMORY button
!¡ KARAOKE PON/MIX button
!™ MIC LEVEL/ECHO VOL dial
!£ MIX MIC1 jack
!¢ GROOVE button
!∞ VOLUME dial
!§ ) + button
!¶ ENTER/NEXT button
!• MULTI JOG STATION dial
!ª 0 – button
@º NON-STOP button
@¡ EDIT button
@™ FLASH button
@£ PLAY MODE button
@¢ REPEAT button
@∞ PHONES jack
@§ LOOP button
@¶ CLOCK/TIMER SET button
@• TIMER SELECT button
@ª FUNCTION button
#º PROLOGIC button
#¡ DSP button
#™ DBFB button
#£ DISPLAY/DEMO button
#¢ I/u (POWER) button
#∞ MIX MIC2 jack
#§ KEY CONTROL (n)
#¶ KEY CONTROL (˜)
— 3 —
Rear Panel
7
1
6
2
5
Photo : STR-V7770 (Chinese model)
4
3
1 SYSTEM CONTROL jack
2 ANTENNA terminal
3 CENTER SPEAKER terminal
4 REAR SPEAKER terminal
5 MONITOR OUT jack
6 FRONT SPEAKER terminal
7 MD/VIDEO 1 jack
— 4 —
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
2-1. SLIDING PANEL ASSEMBLY
4
Flat type cable (19 core)
Slide mechanism
1
Push the OPEN/CLOSE button to
open the Sliding panel assembly.
5
Sliding panel assembly
• NOTE FOR INSTALLATION (LEVEL SLIDER)
(Perform this DISASSEMBLY after the front panel is removed.)
1
Screw (BVTP2.6 × 8)
3
Top bracket
4
Four screws
(BVTP2.6 × 8)
5
Holder (L) assembly
b
a
2
Screw
(BVTP2.6 × 8)
2
Screw (BVTP 3 × 8)
3
Holder level
8
Remove the Level slider direction of arrow.
7
Holder (R) assembly
a
NOTE :
Attach in the reverse order, but make sure the rollers (a, b) of the
holder (L) assembly and holder (R) assembly fit into the grooves of
the level slider.
b
— 5 —
Four screws (BVTP2.6 × 8)
6
SECTION 3
SERVICE MODE
Connections and Operations When Used Alone
Normally, use the unit connected to the HTC-V5550 as follows.
Basically, when servicing the unit, connect the unit as follows.
UNIT
SYSTEM CONTROL 17P
AC IN
Even when not connected to the HTC-V5550, the unit can operate alone as it mounts a power supply (some functions will however not be
available).
MC Cold Reset
• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the
customer.
Procedure:
1. Press three buttons EDIT , ENTER/NEXT , and DISPLAY/DEMO simultaneously.
2. The fluorescent indicator tube becomes blink instantaneously, and the set is reset.
CD Delivery Mode (This mode can be used only when the HTC-V5550 is connected.)
• This mode moves the pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
Procedure:
1. Press 1/u button to turn the set ON.
2. Press LOOP button and 1/u button simultaneously.
3. A message “LOCK” is displayed on the fluorescent indicator tube, and the CD delivery mode is set.
MC Hot Reset
• This mode resets the set with the preset data kept stored in the memory . The hot reset mode functions same as if the power cord is plugged
in and out.
Procedure:
1. Press three buttons REPEAT , ENTER/NEXT , and DISPLAY/DEMO simultaneously.
2. The fluorescent indicator tube becomes blink instantaneously, and the set is reset.
HTC-V5550
Sled Servo Mode (This mode can be used only when the HTC-V5550 is connected.)
• This mode can run the CD sled motor freely. Use this mode, for instance, when cleaning the pick-up.
Procedure:
1. Select the function “CD”.
2. Press three buttons FLASH , ENTER/NEXT , and KARAOKE PON/MIX simultaneously.
3. The Sled Servo mode is selected, if “CD” is blinking on the fluorescent indicator tube.
4. With the CD in stop status, press ) + button move the pick-up to outside track, or – 0 button to inside track.
5. To exit from this mode, perform as follows:
1) Move the pick-up to the most inside track.
2) Press three buttons in the same manner as step 2.
Note:
• Always move the pick-up to most inside track when exiting from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.
Change-over of FUNCTION Name
• The FUNCTION name of external input terminal can be changed over to VIDEO 1 or MD. W ith the FUNCTION selected to “MD”, about
5dB mute is applied to the input gain.
Procedure:
1. Press 1/u button to turn the set OFF.
2. Press 1/u button together with FUNCTION button, and the power is turned on, the display of fluorescent indicator tube changes to
“MD” or “VIDEO 1” instantaneously, and thus the FUNCTION is changed over.
Change-over of AM Tuner Step between 9kHz and 10kHz
• A step of AM channels can be changed over between 9kHz and 10kHz.
Procedure:
1. Press 1/u button to turn the set ON.
2. Select the function “TUNER”, and press TUNER/BAND button to select the BAND “MW”.
3. Press 1/u button to turn the set OFF.
4. Press ENTER/NEXT and 1/u buttons simultaneously, and the display of fluorescent indicator tube changes to “MW step 10” or
“MW step 9”, and thus the channel step is changed over.
— 6 —
LED and Fluorescent Indicator Tube All Lit, Key Check Mode (Do not connect the HTC-V5550.)
Procedure:
1. Press 1/u button to turn the set ON.
2. Press the OPEN/CLOSE button to open the sliding panel.
3. Press three buttons DELAY , ENTER/NEXT , and DISPLAY/DEMO simultaneously.
4. LEDs and fluorescent indicator tube are all turned on. Each time the MOVIE button is pressed, the fluorescent indicator tube lights up
as follows:
lights up completely n lights up partially 1 n lights up partially 2 n lights up completely.
5. Press GAME button, and the key check mode is activated.
6. In the key check mode, the fluorescent indicator tube displays “K @@ V0 J0”. Each time a button is pressed, “K”value decreases.
However, once a button is pressed, it is no longer taken into account. (@@ means the total of buttons)
“J” Value increases like 1, 2, 3 ... if rotating JOG knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
“V” Value increases like 1, 2, 3 ... if rotating VOLUME knob in “+” direction, or it decreases like 0, 9, 8 ... if rotating in “-” direction.
7. Pressing all buttons lights up the fluorescent indicator tube completely.
8. To exit from this mode, press three buttons EDIT , ENTER/NEXT and DISPLAY/DEMO simultaneously. (COLD RESET)
9. To exit from this mode, press three buttons in the same manner as step 1, or disconnect the power cord.
CD, TAPE Deck Aging Mode (This mode can be used only when the HTC-V5550 is connected.)
This mode can be used for checking the operations of the CD player and tape deck.
• When problems occur;
Aging stops, and the stopped state is displayed on the fluorescent indicator tube.
• When no problems;
Aging continues.
Preparations:
• Set the CD on the DISC1 tray.
• Insert a commercially available tape for recording (tapes which contents can be erased, etc.) in decks A and B.
Setting the aging mode:
Press the PLAY MODE button, ENTER/NEXT button, and STEREO/MONO button together.
When the aging mode is set, the CD roulette mark blinks. To exit the mode, press the 1/u button and turn OFF the power.
Sequence:
The aging mode is executed in the following sequence.
If the function is set to “CD” when the aging mode is set, aging is performed starting from the CD player. When set to “TAPE A” or “TAPE
B”, aging is started from deck A.
If the function is set to others, aging will not be started until the function is switched to CD or TAPE.
Aging of CD player (12 minutes)
Aging of deck A
Aging of deck B
12 minutes
Display of status:
• The aging status is displayed on the fluorescent indicator tube.
• Normally, the CD player displays the remaining aging time. But if operations ended abnormally, it displays the cause.
• During the aging of the tape deck, the operations performed will be displayed. If operations ended abnormally , this will be displayed at the
fluorescent display tube.
CD Player
• During normal operations:
Display of fluorescent indicator tube
**1-@@
**: Displays “CD” and the remaining aging time (minutes) alternately. The remaining aging time is counted down from 12.
@@: Track number being accessed.
— 7 —
• When operations end abnormally:
Display of fluorescent display tube
Display
NO DISC ERR
FOCUS1 ERR
FOCUS2 ERR
GFS ERR
FBIAS ERR
SENSOR ERR
TABLE ERR
TRAY ERR
Tape Deck
Display of Operations
TAPE A AG-1
TAPE A AG-2
TAPE A AG-3
TAPE A AG-4
TAPE A AG-5
TAPE B AG-1
TAPE B AG-2
TAPE B AG-3
TAPE B AG-4
TAPE B AG-5
Main Cause
DISC 1 is NO DISC from the beginning
Focus is not imposed properly
The focus deviated several times after the disc rotated normally
GFS ERROR
Error during focus bias adjustment
DISC 1 was found to be NO DISC by the disc sensor
The table did not rotate normally
The tray containing the BD did not operate normally
Operation
TAPE A REW
TAPE A FWD
TAPE A FF
TAPE A REV
TAPE A REW
TAPE B REW
TAPE B FWD
TAPE B FF
TAPE B REV
TAPE B REW
Shutoff
2 minute playback
20 seconds or shutoff
2 minutes playback
Shutoff
Shutoff
2 minute playback
20 seconds or shutoff
2 minute playback
Shutoff
Timing of Ending
Operations during aging
• Operations are performed in the following sequence during aging.
<CD player>
1. The CD tray rotates and disc 1 is selected.
2. Chucking is performed.
3. TOC is read.
4. Track 1 played back for 2 seconds.
5. The last track is played back for 2 seconds.
6. 1 to 5 is repeated.
7. After 12 minutes of aging, aging is switched to the tape deck.
<Tape Deck>
1. The tape in deck A is rewound to the head.
2. The FWD side is played back for 2 minutes.
3. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20
seconds.
4. The REV side is played back for 2 minutes.
5. The tape is rewound to the head (REW).
6. The tape in deck B is rewound to the head.
7. The FWD side is played back for 2 minutes.
8. The tape is fast forwarded (FF) for 20 seconds. The following procedure is performed when the tape end is reached before the 20
seconds.
9. The REV side is played back for 2 minutes.
10. The tape is rewound to the head (REW).
11. Aging is switched to the CD player.
— 8 —
PANEL Aging Mode
This mode is used for opening and closing the sliding panel continuously.
Setting the aging mode :
With the set at standby condition, press FLASH button, ENTER/NEXT button and STEREO/MONO button together.
The aging will start and sliding panel will follow aging sequence as described below.
• When problems occur ;
Aging stops and “AGING ERROR” is displayed on the fluorescent indicator tube.
• When no problems;
Aging is carried out repeatedly. After 65000 times, “AGING STOP” is displayed and aging stops.
Aging Sequence
Stops for one second in the opened state
Panel open Panel close
n
Counts up
n n
Stops for one second in the closed state
Each time the DISPLAY/DEMO button is pressed, the display switches as follows.
Aging @@@@@ (No. of agings carried out)
OP Max @.@@ (Maximum time taken for OPEN:In seconds)
OP Min @.@@ (Minimum time taken for OPEN:In seconds)
CL Max @.@@ (Maximum time taken for CLOSE:In seconds)
CL Min @.@@ (Minimum time taken for CLOSE:In seconds)
— 9 —
4-1. CIRCUIT BOARDS LOCATION
d
SECONDARY board
CONNECTOR board
(V7770 MODEL)
SECTION 4
DIAGRAMS
PRIMARY board
ENCAPSULATED COMPONENT
SURR SPK boar
HEADPHONE board
LOADING PANEL board
FRONT AV board
SURR AMP board
(V7770 MODEL)
POWER AMP board
MIC / ECHO board
MOTOR board
PANEL board
DETECTOR board
— 10 —
MAIN board
4-2. BLOCK DIAGRAMS
— MAIN SECTION —
1
2
7
9
5
6
14
16
17
13
VIDEO
AUDIO L
IN L
OUT L
COM DIN
COM DATA
ST CE
COM CLK
MUTE
STEREO
TUNED
POWER ON/OFF
AC1
AC2
VF1
VF2
ST L
SYSTEM
CONTROL
HTC-V5550
AV INPUT
(VIDEO 2)
VIDEO 1
FM/AM TUNER
TUNER UNIT IS
SUPPLIED AS
THE ASSEMBLED
BLOCK
B
POWER
SECTION
16
CN101
TO
J6301
J101
MD/
R-CH(CD R)
R-CH(PB R)
R-CH(REC R)
IIC DATA
IIC CLK
AC1
AC2
FL601
FLUORESCENT
INDICATOR
TUBE
DISPLAY CONTROL
IC601
G0
12
I
DATA
1
CLK
64
I
61
59
I
33
31
I
23
G15
S35
CS
RESET
S0
STR-V5550/V7770
VIDEO
EQ
IC111(1/2)
TU
69
CD
68
V2
67
TC
66
MD/V1
65
R-CH
AV SWITCH
Q6301
16
15
14
13
KEY
MATRIX
MULTI JOG
STATION
S653
VOLUME
S652
SLIDING
SENSOR
IC504,Q513
REMOTE
SENSOR
IC503
SELECT
SWITCH
15
4
22
SPEANA CONT
SPEANA0
26
27
SPEANA1
AV IN
41
I2C DATA
55
I2C CLK
56
92
DATA OUT
90
DATA IN
LAT
89
93
CLK
ST MUTE
86
STREO
87
88
TUNED
POWER ON/OFF
94
FL DATA
35
FL CLK
36
FL LAT
37
FL RESET
38
28
KEY0
I
I
31
KEY3
JOG A
20
21
JOG B
VOL A
18
19
VOL B
SENSOR IN
42
SIRCSN
43
X501
5MHz
R-CH
SPEANA
SELECTOR
IC505
Y
Z
9 10
X2 X1
10 11
2
1
Y1
Y2
2
3
Z1
Z2
5
25
VACS
PRO-LOG CLK/LEVEL B
PRO-LOG DATA/LEVEL A
MASTER CONTROL
IC501
XT2 XT1
13 14
EQ
AMP
BPF FILTER
17 f1
16
f2
15 f3
14 f4
13 f
PRO-LOG LAT2
PRO-LOG LAT1
PANEL OPEN
PANEL CLOSE
X502
32kHz
SPEANA
IC506
LINE
GEQ DATA
GEQ CLK
GEQ LAT
DBFB B2
DBFB B1
TA MUTE
RESET
ACCUT
42 41
4
59
3
60
57
58
DOLBY PRO-LOGIC
IC300
L IN
LED
IN
61
R-CH
4
ENABLE2
49 50 54 51 5352
99
98
3
2
1
96
2
97
3
95
5
6
7
50
I
54
.
57
I
70
.
72
.
73
15
32
82
83
84
85
D504
5
6
LED
ON/OFF
SWITCH
Q502-512
Q531-540
RESET
SWITCH
Q501
IC891
MOTOR
DRIVER
PANEL
OPEN/CLOSE
S892
2
10
CLK DATA
ENABLE
PANEL
LED
L OUT
S OP OUT
C OP OUT
RESET
IC502
M
24
33
31
OSC2
47
46
OSC1
76
MIC AMP
IC6001(2/2)
D507
M891
PANEL
MOTOR
X301
8MHz
+5.6V
VOLUME
IC111(2/2)
MICON
INTERFACE
33
32 34
123
RV6001(2/2)
ECHO VOL
36
40
38
30
39
AMP
IC361
5
3
1
8 1
LPF 2 OUT
7
1
DELAY/REVERB SWITCH
DELAY LEVEL SELECT
IC402
15
10
14
11
4
9
DELAY
IC401
LPF 1 IN
LPF 2 OUT
CLOCK
13
DELAY/REVERB
SWITCH
Q401
MUTE
SWITCH
Q121
ECHO PROCESSOR
IC6002
R-CH
V5550 ONLY
2
1
12
13
5
3
8
LPF 1 IN
57
AMP
IC113(2/2)
SELECTOR
MUTE
Q361,371
DBFB
IC112
MUTE
Q183
SW
Q132
RV6001(1/2)
MIC LEVEL
L-CH
S/W
MUTE
DET
D131
MIC AMP
IC6001(1/2)
1
L+R
V7770 MODEL
S OUT
C OUT
TA MUTE
3
• R CH: Same as L ch
• SIGNAL PATH
: FM
: AUDIO(AV INPUT)
: MD/VIDEO
: PB
: VIDEO(AV INPUT)
: REC
: CD
C
POWER
SECTION
J6001
MIX
MIC 1
J6002
MIX
MIC 2
— 11 — — 12 —
STR-V5550/V7770
– POWER SECTION –
VIDEO
RY781
J781
VIDEO OUT
C
MAIN
SECTION
S/W
C OUT
S OUT
L+R
L-CH
TA MUTE
POWER AMP
IC4001(1/2)
POWER AMP
IC4001(2/2)
MUTE
Q181
1
18
POWER AMP
IC901
20
8
MUTE
SWITCH
Q901
10
OVER LOAD
13
OVER LOAD
15
OVER LOAD
DET
Q4002
DET
Q4052
DET
Q952
R-CH
R-CH
RY741
RY751
R-CH
D761
D751
D746
R-CH
R-CH
SUPER WOOFER
V7770 MODEL
TB201
CENTER
SPEAKER
L
REAR
SPEAKER
R
V5550 MODEL
TB201
L
REAR
SPEAKER
R
TB751
FRONT
L
SPEAKER
PHONES
J755
B
MAIN
SECTION
16
MUTE
POWER ON/OFF
AC1
AC2
VF1
VF2
D852,853
ST+10V
3 1
REG
IC804
+7V REG
3
IC801
+5.6V REG
3
IC803
FAN MOTOR
REG
Q731,732
-7V REG
3
IC802
VG REG
Q801
1
1
+
–
2
+
–
+
–
POWER ON
MUTE
Q852
OVER LOAD
SWITCH
Q851
1
4
2
PROTECTOR
PROTECTOR
IC851
VCC ON
MUTE
7
SWITCH
Q853
ST+10V
UNREG
+12V
+7V
+5.6V
D813
+5V
M901
M
6
FAN
MOTOR
SURR +B
SURR -B
-7V
+B
-B
VG
— 13 — — 14 —
RECT
D810,811
RECT
D805-808
RECT
D801
RECT
D802, 803
V7770 MODEL
RECT
D809
AC1
AC2
VF1
VF2
T901
POWER
TRANSFORMER
AC
IN
VOLTAGE
SELECTOR
S871
HK,MY,SP,IA
• R CH : Same as L ch
• SIGNAL PATH
: FM
: VIDEO (AV INPUT)
• Abbreviation
HK : Hong Kong
SP : Singapore
MY : Malaysia
IA : Indonesia
THIS NOTE IS COMMON FOR PRINTED WIRING
5MHz
5.5Vp-p
d
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
Waveforms
– DISPLAY Section –
1
For schematic diagrams.
Note:
• 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 Ω and 1/4 W or less unless otherwise
specified.
¢
•
• 2 : nonflammable resistor.
• 1 : fusible resistor.
• C : panel designation.
• 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 MΩ).
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Abbreviation
: internal component.
The components identified by
mark ! or dotted line 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 produc-
tion tolerances.
Voltage variations may be noted due to normal produc-
tion tolerances.
F : FM
f : AM
L : AUDIO (AV INPUT)
g : MD/VIDEO
i : VIDEO (AV INPUT)
E : PB (DECK A)
G : REC (DECK B)
J : CD
HK : Hong Kong
SP : Singapore
MY : Malaysia
CH : Chinese
TH : Thai
IA : Indonesia
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• p : parts mounted on the conductor side.
®
•
•
• b : Pattern from the side which enables seeing.
: Through hole.
¢
: internal component.
• Indication of transistor
C
Q
These are omitte
EB
C
EB
These are omitted
IC501 0 X2
2
5Vp-p
32.768kHz
IC501 !£ XT2
— 15 —
– 16 –
STR-V5550/V7770
4-3. PRINTED WIRING BOARD — MAIN SECTION —
V7770
• Semiconductor
Location
Ref. No. Location
D101 B-11 D102 B-11 D131 E-9 D401 D-5 D402 D-5 D403 C-9 D742 F-8 D743 F-10 D746 F-11 D751 F-11 D752 E-10 D761 E-12 D781 G-10 D801 E-4 D802 F-5 D803 E-4 D804 C-2 D805 F-4 D806 F-4 D807 F-4 D808 F-4 D810 E-4 D811 E-4 D812 C-2 D813 B-2 D851 F-8 D852 G-8 D853 G-8
• Refer to page 10 for Circuit Boards Location.
V5550
V7770
V7770
V5550
V7770
V7770
V7770
V5550
IC111 C-10 IC112 E-10 IC113 E-9 IC300 A-7 IC361 A-5 IC401 E-7 IC402 D-6 IC801 B-2 IC802 C-3 IC803 B-2 IC804 D-4 IC851 G-9
Q121 B-2 Q132 D-10 Q182 E-11 Q183 E-8 Q361 B-4 Q371 A-4 Q401 D-7 Q731 G-11 Q732 G-10 Q741 F-9 Q801 C-2 Q851 G-9 Q852 H-8 Q853 H-8
— 17 — — 18 —
STR-V5550/V7770
4-4. SCHEMATIC DIAGRAM — MAIN (1/2) SECTION (V5550 MODEL) —
• Refer to page 47 for IC Block Diagrams.
— 19 — — 20 —
STR-V5550/V7770
4-5. SCHEMATIC DIAGRAM — MAIN (1/2) SECTION (V7770 MODEL) — • Refer to page 17 for Printed Wiring Board..
• Refer to page 46 to 47 for IC Block Diagrams.
— 21 — — 22 —
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