Sony DE-85 Service manual

D-E808/E885
SERVICE MANUAL
Ver 1.1 1999. 02
SPECIFICATIONS
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
D-E885
Tourist Model
D-E808
Model Name Using Similar Mechanism D-E800/E805 CD Mechanism Type CDM-2911EBA Optical Pick-Up Name DAX-11E
CD player section
System
Compact disc digital audio system
Laser diode properties
Material: GaAlAs Wavelength: λ = 780 nm Emission duration: Continuous Laser output: Less than 44.6 µW (This output is the value measured at a distance of 200 mm from the objective lens surface on the optical pick-up block with 7 mm aperture.)
Error correction
Sony Super Strategy Cross Interleave Reed Solomon Code
D-A conversion
1-bit quartz time-axis control
Frequency response
20 - 20,000 Hz
307)
Output (at 4.5 V input level)
Headphones (stereo minijack)
15 mW + 15 mW at 16 ohms
Line output (stereo minijack)
Output level 0.7 V rms at 47 kilohms Recommended load impedance over 10
kilohms Optical digital output (optical output connector)
Output level: –21 to –15 dBm
Wavelength: 630 – 690 nm at peak level
+1
dB (measured by EIAJ CP-
–2
General
Power requirements
For the area code of the model you purchased, check the upper left side of the bar code on the package.
• Two Sony NH-DM2AA rechargeable batteries: 2.4 V DC Two Sony NC-DMAA rechargeable batteries: 2.4 V DC
• Two LR6 (size AA) batteries: 3 V DC
• AC power adaptor (DC IN 4.5 V jack): US/Canadian model: 120 V, 60 Hz AEP/E13 model: 220 – 230 V, 50/60 Hz UK model: 230 – 240 V, 50Hz Australian model: 240 V, 50 Hz Tourist/E33 model: 100 – 240 V, 50/60 Hz Hong Kong model: 220 V, 50/60 Hz Chinese model: 220 V, 50 Hz
• Sony DCC-E245 car battery cord for use on car battery: 4.5 V DC
Dimensions (w/h/d) (without projecting parts and controls)
Approx. 131.8 × 24.2 × 142.0 mm (5 1/4 × 31/32 × 5 5/8 in.)
Mass (without rechargeable batteries)
Approx. 210 g (7.4 oz)
Operating temperature
5 ˚C – 35 ˚C (41 ˚F – 95 ˚F)
Supplied accessories
For the area code of the model you purchased, check the upper left side of the bar code on the package.
AC power adaptor (1) Headphones with remote control (1)* Earphones with remote control (1)* Rechargeable batteries (2) AC plug adaptor (1)* Battery carrying case (1) Carrying case (1) *1Supplied with US model *2Not supplied with US model *3Supplied with Tourist, E33 and E13 models
Design and specifications are subject to change without notice.
• Abbreviation E13: 220 – 230 V AC area in E model E33: 100 – 240 V AC area in E model
3
1
2
MICROFILM
COMPACT DISC COMPACT PLAYER

TABLE OF CONTENTS

1. SERVICING NOTES ............................................... 3
2. GENERAL ................................................................... 4
3. DISASSEMBLY ......................................................... 8
4. SERVICE MODE...................................................... 9
This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior.
5. ELECTRICAL ADJUSTMENTS......................... 10
6. DIAGRAMS
6-1. Block Diagram – MAIN Section – ................................. 15
6-2. Block Diagram – POWER SUPPLY Section – .............. 19
6-3. IC Pin Function Description ........................................... 21
6-4. Printed Wiring Boards (Suffix-11) ................................. 24
6-5. Schematic Diagram (Suffix-11)...................................... 27
6-6. Schematic Diagram (Suffix-12)...................................... 31
6-7. Printed Wiring Board (Suffix-12) ................................... 35
7. EXPLODED VIEWS ................................................ 43
8. ELECTRICAL PARTS LIST ............................... 46
CAUTION
Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra­diation exposure.
Discrimination of MAIN board
– MAIN BOARD (Side A)
1-671-585-11
or
1-671-585-12
Flexible Circuit Board Repairing
• Keep the temperature of the 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.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam­aged by heat.
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 PUB­LISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS P AR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM­POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
– 2 –
SECTION 1

SERVICING NOTES

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro­static breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body . During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care.
Befor Replacing the Optical Pick-Up Block
Please be sure to check thoroughly the parameters as par the “Op­tical Pick-Up Block Checking Procedures” (Part No.: 9-960-027-
11) issued separately before replacing the optical pick-up block. Note and specifications required to check are given below.
• FOK output: IC501 !™ pin When checking FOK, remove the lead wire to disc motor.
• S curve P-to-P value: 0.6 to 1.8 Vp-p IC501 pin When checking S curve P-to-P value, remove the lead wire to disc motor.
• RF signal P-to-P value: 0.8 to 1.2 Vp-p
• Traverse signal P-to-P value: 1.2 Vp-p
• The repairing grating holder is impossible.
Precautions for Checking Emission of Laser Diode
Laser light of the equipment is focused by the object lens in the optical pick-up so that the light focuses on the reflection surface of the disc. Therefore, be sure to keep your eyes more then 30 cm apart from the object lens when you check the emission of laser diode.
Laser Diode Checking Methods
During normal operation of the equipment, emission of the laser diode is prohibited unless the upper panel is closed while turning ON the S801. (push switch type) The following two checking methods for the laser diode are oper­able.
• Method (In the service mode or normal operation): Emission of the laser diode is visually checked.
1. Open the upper lid.
2. Push the S801 as shown in Fig. 1.
3. Press the ^ key.
4. Check the object lens for confirming normal emission of the
laser diode. If not emitting, there is a trouble in the automatic power control circuit or the optical pick-up. During normal operation, the laser diode is turned ON about
2.5 seconds for focus searching.
S801
Fig. 1 Method to push the S801
– 3 –
SECTION 2

GENERAL

This section is extracted from instruction manual.
– 4 –
– 5 –
– 6 –
– 7 –
SECTION 3
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
CABINET (LOWER)
1
five screws (2
×
8)
5
cabinet (lower)
4
two claws
4
two claws
2
Open the battery case lid.
INSTALLATION MAIN BOARD
On installation MAIN board adjust the S301, 803, 804, and knob (H-R, A VLS).
S804
3
two claws
Note:Take care not to allow the rechargeable
battery detection plate to ride on the mold of the bottom plate.
S301
S803
knob (AVLS)
knob (H-R)
– 8 –
SECTION 4

SERVICE MODE

Service Mode (Service program)
The equipment is provided with a service program built in the microcomputer, like conventional models. Service program operation methods are described in the follow­ing.
PLAY MODE
HOLD
c
Be sure to turn OFF the HOLD switch (If ON, all the LCD indication and LED are lightup)
=
(FR) The optical pick-up is moved inwardly
+
The optical pick-up is moved outwardly
(FF)
Tracking servo and sled servo are turned ON
REPEAT/ENTER
Tracking gain-up mode while pressing
^
(PLAY/PAUSE) Focus is tuned ON to effect draw-in mode
p
(STOP)
[All servos are turned OFF]
4. By pressing the ^ key, focus is turned ON from focus search- ing while entering CLV-S. (draw-in mode) Without disc, focus searching is repeated continuously.
5. By pressing the PLAY MODE key, tracking servo, sled servo and CLV-A (servo in PLAY) are turned ON.
6. When step 4 and 5 are performed, playing begins. No muting is ON in the service mode.
7. By pressing the p key, all servos (focus, tracking and sled) are turned OFF. However , the disc motor re volv es for a w hile by inertia.
• Step 3 (Resetting of service mode)
1. Be sure to disconnect the external power supply and remove the solder bridge at the TEST terminals connected before in setting.
2. The set thus becomes available for normal operation.
– MAIN BOARD (Side A) –
Descriptions in [ ] indicate major operations in the service mode. For more informatrion, see Step 2.
Fig. 1 Layout of each key
• Step 1 (Service mode setting methods)
1. Turn OFF the HOLD switch with external power supply dis­connected. (power is not applied to the set)
2. Solder across the TEST terminals (TAP802). (pin , IC801 (ESPSL/TEST) is grounded)
3. Connect an external power supply.
Thus, the set is switched to the service mode.
• Step 2 (Operation in the service mode)
1. Once the service mode is ef fected, the LCD displays 5 indica­tions each of which is repeatedly displayed. However , the follo wing operations can be activated e ven if LCD indication is effected.
2. By pressing the + or = ke y, the optical pick-up is mov­able inwardly or outwardly . Howe ver, if this is acti vated, track­ing servo and sled servo are turned OFF, so it can be turned ON by pressing the PLAY MODE key if required.
3. By pressing the REPEAT/ENTER key, the tracking gain-up mode becomes active.
TAP802
(TEST)
– 9 –
Fig. 2 Location of Test terminal
SECTION 5

ELECTRICAL ADJUSTMENTS

Precautions for Adjustment
1. Before beginning adjustment, set the equipment to service mode. After the completion of adjustment, be sure to reset the ser­vice mode. For more information, see “Service Mode (service program) ” on page 9.
2. Perform adjustments in the order given.
3. Use YEDS-18 disc (P art No.: 3-702-101-01) unless otherwise indicated.
4. Power supply voltage requirement: DC2.5 V in battery termi­nal VOLUME knob : Minimum RESUME switch : OFF ESP switch : OFF AVLS switch : NORMAL HOLD switch : OFF
Before Beginning Adjustment
Set the equipment to service mode (See page 9) and check the following. If there is an error, repair the equipment.
• Checking of the sled motor
1. Open the upper panel.
2. Press the + and = keys and check that the optical pick­up can move smoothly without sluggishness or abnormal noise in innermost periphery n outermost periphery n innermost periphery
+ : The optical pick-up moves outwardly. =: The optical pick-up moves inwardly.
• Checking of focus searching
1. Open the upper panel.
2. Press the ^ key. (Focus searching operation is activated continuously)
3. Check the object lens of the optical pick-up for smooth up/ down motion without sluggishness or abnormal noise.
4. Press the p key. Check that focus searching operation is deactivated. If not, again press the p key slightly longer.
Focus bias Check
Condition:
• Hold the set in horizontal state.
Check Procedure:
oscilloscope
(AC range)
MAIN board
TP522 (RFO) TP520 (VC)
SUFFIX-11: See page 12 SUFFIX-12: See page 13
2 k
+ –
1. Set the equipment to service mode stop state. (See page 9)
2. Connect the oscilloscope to the test point TP522 (RFO) on the MAIN board.
3. Move the optical pick-up to the center by pressing the + and = keys.
4. Put the disc. (YEDS-18)
5. Press the ^ key.
From focus searching, focus is turned ON while entering CLV drawing-in mode. Tracking and sled are turned OFF.
6. Press the PLA Y MODE key . (Both tracking and sled are turned ON)
7. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (≈) in the center of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
VOLT/DIV : 200 mV (With the 10:1 probe in use) TIME/DIV : 500 ns
RF level
0.8 to 1.2 Vp-p
VCC Adjustment
Adjustment Procedure:
digital voltmeter
(DC range)
MAIN board TP401 (VCC)
SUFFIX-11: See page 12 SUFFIX-12: See page 13
+ –
1. Set the equipment to service mode stop state. (See page 9)
2. Connect the digital voltmeter to TP401 (VCC) on the MAIN board.
3. Adjust RV401 on the MAIN board so that the r eading on digi­tal voltmeter goes 2.53 V. Specifications: 2.5 V to 2.55 V
4. After the completion of adjustment, reset service mode. (See page 9)
Adjustment Location:MAIN Board (SUFFIX-11: See page 12,
SUFFIX-12: See page 13)
To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watch­ing.
8. Stop revolving of the disc motor by pressing the p key.
9. After the completion of adjustment, reset service mode. (See page 9)
Checking Location: MAIN Board (SUFFIX-11: See page 12,
SUFFIX-12: See page 13)
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