Sony HCD-EX770 User manual

Sony Corporation
Home A&V Products Company
DHC-EX770MD
HCD-EX770
SERVICE MANUAL
MICROFILM
9-922-860-11
98D001648-1D
Printed in Japan ©1998.4
Published by Quality Assurance Dept.
(Shibaura)
• DHC-EX770MD is composed of following models.
As for the service manual, it is issued for each component
model, then, please refer to it.
AEP Model
UK Model
PARTS LIST (ACCESSORIES & PACKING MATERIALS)
Part No. Description
1-475-883-11 COMMANDER, STANDARD (RM-EX77)
1-501-594-11 ANTENNA (FM)
1-501-721-11 ANTENNA (LOOP)
1-769-170-21 CORD (WITH CONNECTOR) (7P) (TA-ST-MDS-CDP)
1-775-373-11 CORD, CONNECTION (0.5m) (AUDIO)
1-775-924-11 CORD, LIGHT PLUG
3-860-163-13 MANUAL, INSTRUCTION (ENGLISH, SPANISH)
3-860-163-23 MANUAL, INSTRUCTION (FRENCH, DUTCH) (AEP)
3-860-163-33 MANUAL, INSTRUCTION (GERMAN, ITALIAN) (AEP)
3-860-143-43 MANUAL, INSTRUCTION (SWEDISH, PORTUGUESE) (AEP)
4-981-643-01 COVER, BATTERY (FOR RM-EX77)
4-992-237-01 CAP (PJ) (FOR TA-EX770)
MINI Hi-Fi COMPONENT SYSTEM
HCD-EX770 is composed of TA-EX770 and CDP-EX770
COMPONENTS MODEL NAME FOR DHC-EX770MD
AMPLIFIER TA-EX770
TUNER ST-EX770
CD PLAYER CDP-EX770
MINIDISC DECK MDS-EX770

TA-EX660/EX770
AEP Model
UK Model
SERVICE MANUAL
MICROFILM
Ref. No. Part No. Description
9-922-858-11 Sony Corporation
Home A&V Products Company
INTEGRATED STEREO AMPLIFIER
98D001648-1D
Printed in Japan ©1998.4
Published by Quality Assurance Dept.
(Shibaura)
TA-EX660/EX770 is the amplifier section in MHC-EX660 and DHC-EX770MD.
The mechanical and electorical specifications of TA-EX660/EX770 is almost same as
TA-EX66/EX77 AEP/UK model.
So this manual contains only the points which differ from TA-EX66/EX77.
For the informations not contained in this manual, please refer to the TA-EX66/EX77
service manuals (9-960-931- ) previously issued.
•PARTS LIST (The difference betweenTA-EX66/EX77 andTA-EX660/770)
Page
1 4-985-925-01 KNOB(JOG)
2 X-4947-837-1 KNOB(VOL)ASSY
4 X-4948-359-1 PANEL ASSY, FRONT(EX66)
4 X-4948-436-1 PANEL ASSY, FRONT(EX77:AEP, UK)
*58 4-985-927-11 PANEL, BACK(EX77:AEP,UK)
*58 4-985-927-41 PANEL, BACK(EX66:AEP,UK)
Ref. No. Part No. Description
––––––– ––––––– –––––––––
22
TA-EX66/EX77 TA-EX660/EX770
• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
1 4-985-925-11 KNOB(JOG)
2 X-4949-863-1 KNOB(VOL)ASSY
4 X-4949-867-1 PANEL ASSY, FRONT(EX660)
4 X-4949-862-1 PANEL ASSY, FRONT(EX770)
*58 4-985-927-61 PANEL, BACK(EX770)
*58 4-985-927-71 PANEL, BACK(EX660)
23

MICROFILM
AEP Model
UK Model
E Model
SERVICE MANUAL
TA-EX66/EX77
INTEGRATED STEREO AMPLIFIER
TA-EX66/EX77is theamplifiersection
inMHC-EX66, DHC-EX77MD/MD77.
SPECIFICATIONS
Photo:TA-EX77 (AEP, UK model)
General
Power requirements
AEP, UK model: 220 – 230V AC, 50/60 Hz
HK, SP model: 220 – 240 V AC, 50/60 Hz
Power consumption 125 watts
Design and specifications are subject to change without notice.
• Abbreviation
HK : Hong Kong
SP : Singapore
AEP, UK model:
DIN power output 45 + 45 watts (6 ohms at 1 kHz, DIN)
Continuous RMS power output
60 + 60 watts (6 ohms at 1kHz, 10% THD)
Music power output 105 + 105 watts
HK, SP model:
Continuous RMS power output
55 + 55 watts (6 ohms at 1 kHz, 5% THD)
Inputs
CD IN, MD IN (phono jacks): voltage 450 mV, impedance 47 kilohms
TUNER IN, TAPE IN, VIDEO1 IN, VIDEO2/AUX IN (TA-EX66/
EX77:AEP, UK model),VIDEO2 IN (TA-EX77: HK,SP model) (phono
jacks): voltage 250 mV, impedance 47 kilohms
MIX MIC (phone jack):
sensitivity 1 mV, impedance 10 kilohms or more
Outputs
MD OUT, TAPE OUT, VIDEO1 OUT (phono jacks):
voltage 250 mV, impedance 1 kilohm
PHONES (stereo phone jack):
accepts headphones of 6 ohms or more.
SPEAKER: accepts impedance of 6 to 16 ohms.
Dimensions (w/h/d) incl. projecting parts and controls:
Approx. 280 ×122.5 ×298 mm
Mass Approx. 5.3 kg

– 2 –
SAFETY-RELATED COMPONENT WARNING!!
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 PUB-
LISHED BY SONY.
TABLE OF CONTENTS
1. GENERAL ....................................................................3
2. DISASSEMBLY ...........................................................6
3. DIAGRAMS
3-1. IC Pin Function Description .............................................9
3-2. Schematic Diagram .........................................................14
3-3. Printed Wiring Boards .....................................................19
4. EXPLODEDVIEWS ................................................22
5. ELECTRICAL PARTS LIST .................................24
MODEL IDENTIFICATION
– BACK PANEL –
4-985-927-
TA-EX77 (AEP, UK model) : 1πCED/CEK
TA-EX77 (Singapore model) : 2πSP
TA-EX77 (Hong Kong model): 3πHK
TA-EX66 (AEP, UK model) : 4πCED/CEK
TA-EX66 (Singapore model) : 5πSP

– 3 –
SECTION 1
GENERAL This section is extracted
from instruction manual.

– 4 –

– 5 –

– 6 –
SECTION 2
DISASSEMBLY
•This set can be disassembled in the order shown below.
CONNECTOR BOARD
(Page 7)
BACK PANEL
(Page 7)
MAIN BOARD
(Page 8)
CASE, FRONT PANEL ASS’Y
(Page 6)
1 screw (BVTT3 × 8)
2 two screws
(case 3 TP2)
2 two screws
(case 3 TP2)
3 case
4 two screws
(BVTP3
× 10)
5 two legs (F)
6 three screws
(BVTP3
× 10)
7 claw
7 two claws
7 two claws
8 front panel ass’y
CASE, FRONT PANEL ASS’Y
Note: Follow the disassembly procedure in the numerical order given.

– 7 –
BACK PANEL
CONNECTOR BOARD
1 connector
(CN911)
2 connector
(CN504)
3 screw
(BVTP3
× 8)
3 three screws
(BVTP3
× 10)
3 five screws
(BVTP3
× 10)
4 claw
5 Remove the back panel to
direction of the arrow
A .
A
EX77
1
connector
(CN501)
2 Remove the connector (CN553) to
direction of the arrow
A .
3 Remove the connector (CN554) to
direction of the arrow
B .
4 Remove the connector board to
direction of the arrow
C .
A
B
C

– 8 –
MAIN BOARD
1 two screws
(BVTP3
× 16)
2 four screws
(BVTT3
× 6)
3 Remove the MAIN board to
direction of the arrow.