Page 1
HCD-EC69i/EC79i/EC99i
2
NOTES ON CHIP COMPONENT REPLACEMENT
- Never reuse a disconnected chip component.
- Notice that the minus side of a tantalum capacitor may be dam-aged by heat.
FLEXIBLE CIRCUIT BOARD REPAIRING
- Keep the temperature of 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. SAFETY CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, metallized knobs,
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes.).
Leakage current can be measured by any one of three methods.
1. A commercial leakage tester, such as the Simpson 229 or RCA
WT-540A. Follow the manufacturers instructions to use these
instruments.
2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication
is 0.75 V, so analog meters must have an accurate low-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples
of a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2 V AC range are suitable. (See
Fig. A)
1.5 kΩ
0.15 μF AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE
WITH MARK 0 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.
ATTENTION AU COMPOSANT AYANT RAPPORT - LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR
LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES
PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONC-
TIONNEMENT. NE REMPLACER CES COMPOSANTS QUE
PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DON-
NÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS
PUBLIÉS PAR SONY. CAUTION
Use of controls or adjustments or performance of procedures
other than those speci
fi ed herein may result in hazardous radia-
tion exposure.
This appliance is classifi ed as
a CLASS 1 LASER product.
This marking is located on the
rear exterior.
Page 2
HCD-EC69i/EC79i/EC99i
3
1. SERVICING NOTES ............................................. 4
2. GENERAL .................................................................. 7
3. DISASSEMBLY
3-1. Disassembly Flow ........................................................... 9
3-2. Side Panel (L)/(R) (HCD-EC69i/EC79i: US, Canadian) .............................. 10
3-3. Top Panel Block (HCD-EC69i/EC79i: US, Canadian) .............................. 10
3-4. Ornament Plate (Dock) or iPod Assy .............................. 11
3-5. Base (Dock) .................................................................... 12
3-6. MAIN Board ................................................................... 12
3-7. Front Panel Block (HCD-EC69i/EC79i: US, Canadian) .............................. 13
3-8. Base Unit Block (BU-K8BD90-WOD) (HCD-EC69i/EC79i: US, Canadian) .............................. 13
3-9. Optical Pick-Up Block (KSM-213CDP) (HCD-EC69i/EC79i: US, Canadian) .............................. 14
3-10. Side Panel (L)/(R) (HCD-EC79i: UK, Australian/EC99i) ............................ 14
3-11. Top Panel Block (HCD-EC79i: UK, Australian/EC99i) ............................ 15
3-12. CD Mechanism Deck (CDM76A-K6BD90-WOD) (HCD-EC79i: UK, Australian/EC99i) ............................ 15
3-13 MAIN Board (HCD-EC79i: UK, Australian/EC99i) ...... 16
3-14. Front Panel Block (HCD-EC79i: UK, Australian/EC99i) ............................ 16
3-15. Base Unit (BU-K6BD90-WOD) (HCD-EC79i: UK, Australian/EC99i) ............................ 17
3-16. Optical Pick-Up Block (KSM-213DCP) (HCD-EC79i: UK, Australian/EC99i) ............................ 17
3-17. Belt (CDM76) (HCD-EC79i: UK, Australian/EC99i) .... 18
4. TEST MODE ............................................................ 19
5. ELECTRICAL ADJUSTMENTS ........................ 23
TABLE OF CONTENTS
6. DIAGRAMS
6-1. Block Diagram - CD, TUNER Section - ........................ 24
6-2. Block Diagram - MAIN Section - ................................... 25
6-3. Block Diagram - PANEL, POWER SUPPLY Section - ........................... 26
6-4. Printed Wiring Board - CD Board - ................................ 28
6-5. Schematic Diagram - CD Board - ................................... 29
6-6. Schematic Diagram - MAIN Board (1/2) - ..................... 30
6-7. Schematic Diagram - MAIN Board (2/2) - ..................... 31
6-8. Printed Wiring Board - MAIN Board - ........................... 32
6-9. Printed Wiring Boards - AMP Section -.......................... 33
6-10. Schematic Diagram - 2CH-4CH AMP Board - ............... 34
6-11. Schematic Diagram - 3CH AMP Board (EC99i) - .......... 35
6-12. Printed Wiring Boards - PANEL Section - ..................... 36
6-13. Schematic Diagram - PANEL Section - .......................... 37
6-14. Printed Wiring Boards - AUDIO IN/OUT, KEY, POWER SUPPLY Section - ............................................ 38
6-15. Schematic Diagram - AUDIO IN/OUT, KEY, POWER SUPPLY Section - ............................................ 39
7. EXPLODED VIEWS
7-1. Overall Section (HCD-EC69i) ........................................ 46
7-2. Overall Section (HCD-EC79i/EC99i) ............................ 47
7-3. Top Panel Section (HCD-EC69i/EC79i: US, CND) ....... 48
7-4. Top Panel Section (HCD-EC79i: UK, AUS/EC99i) ....... 49
7-5. Front Panel Section ......................................................... 50
7-6. iPod Dock Section .......................................................... 51
7-7. MAIN Board, Chassis Section (HCD-EC69i) ................ 52
7-8. MAIN Board Section (HCD-EC79i/EC99i) ................... 53
7-9. Chassis Section (HCD-EC79i/EC99i) ............................ 54
8. ELECTRICAL PARTS LIST .............................. 55
Accessories are given in the last of the electrical parts list.