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MINI Hi-Fi COMPONENT SYSTEM
MICROFILM
US Model
AEP Model
UK Model
E Model
Tourist Model
Model Name Using Similar Mechanism
NEW
CD Mechanism Type
CDM48-5BD29
Base Unit Name
BU-5BD29
Optical Pick-up Name
KSS-213BA/F-NP
Model Name Using Similar Mechanism
NEW
MD Mechanism Type
MDM-C1D
Base Unit Name
MBU-C1
Optical Pick-up Name
KMS-260A/J1N
SPECIFICATIONS
SERVICE MANUAL
HCD-MD515
RM-MD515
HCD-MD515 is the Amplifier, CD player, MD
Deck and Tuner section and RM-MD515 is the
Detachable Controller section in DHC-MD515.
U.S and foreign patents licensed from Dolby Labora-
tories Licensing Corporation.
CD
Section
MD
Section
RM-MD515
HCD-MD515


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­ 2 ­
SELF DIAGNOSTICS


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­ 3 ­
CD SECTION
1. OPERATING THE DISPLAYED HISTORYS
1. Press the DIMMER button, DBFB button, and CD 1
6 but-
ton simultaneously and enter the test mode.
2. Press the PROGRAM button, and mechanical error count and
the cout of "NO DISC" that optical system judged are displyed.
3. Under this condition press the buttons in Table 2, and the re-
spective operations are executed as listed below.
Table 2.
Button
Function
MD/CD 1
Mechanical error cord from latest one to last ten are dis-
played each time this button is pressed. (*1)
MD/CD 2
The reasons of "NO DISC" from latest one to last ten are
displayed each time this button is pressed. (*2)
CD 1
6
Reset the count of mechanical error.
CD 2
6
Reset the count of "NO DISC".
(*1) Mechanical error code
MD SECTION
1. OPERATING THE ERROR HISTORY MODE
All operations are performed using the MULTI JOG dial
and PROGRAM button.
1. Enter the test mode for MD function. (*1)
2. Turn the MULTI JOG dial and display "ERR DP MODE".
3. Press the ENTER/YES button, therefor enter the error his-
tory mode and change the display "total rec".
4. Press the EDIT/NO button, therefor end the error history
mode and change the display "ERR DP MODE".
(*1) See the "SECTION 4 TEST MODE" (page 21) for
detail of test mode.
Table 1.
Contents
Function
Display
total rec
Total time of laser power high.
r
h
About 20% of total recording time.
total play
Total time of playback.
p
h
retry error
Total count of record and playback
r
p
retry error.
total error
Total count of error.
total
err history
Error contents display of from
0
E
(*2)
latest one"00" to last ten "09".
(Turn the MULTI JOG dial and
change the error NO.)
err refresh
Press the PROGRAM button and
complete
(*3)
clear the error histories memory
2. OPERATING THE DISPLAYED HISTORYS
1. Turn the MULTI JOG dial and change the display of error
history contents.
2. Press the PROGRAM button and display error history func-
tion.
3. Press the PROGRAM button again and back the display of
error history contents.
(*2) See table 1-1. for contents of each error code.
(*3) Error refresh with optical pick-up exchange, another not ex-
ecute.
Table 1-1.
Display
Contents
(error No./code)
0:
E00
No error
0:
E01
Disc error PTOC does not read
0:
E02
Disc error UTOC does not read
0:
E03
Loading error
0:
E04
Address does not read
0:
E05
Out of FOK
0:
E06
Focus does not work
0:
E07
Retry of record
0:
E08
Record retry error
0:
E09
Retry of Playback
0:
E0A
Playback retry error
(a)
The number of Mechanical error.
Latest one "00" to last ten "09"
(Turn the MULTI JOG dial and change the error No.)
(b)
"FF": Mechanical error, when mechanical initialize to
completion.
Others: Mechanical error in the midst of mechanical initialize.
(c)
"4
*": Mechanical error in the midst of mechanical initial-
ize, when sub tray set into the stocker.
"5
*": Mechanical error in the midst of mechanical initial-
ize, when sub tray take out to the stocker.
(d)
"2
*": Mechanical error in the midst of elevator moving.
(*2) NO DISC error code
(a)
The number of NO DISC error.
Latest one "00" to last ten "09"
(Turn the MULTI JOG dial and change the error No.)
(b)
"01": Focus error
"02": GFS error
"03": Set up error
(c)
"00": NO DISC error (Does not chucking retry)
"02": NO DISC error (Chucking retry to completion)
(d)
The status, when judged NO DISC error.
"3
*": Stop
"4
*": Set up
"5
*": TOC read
"6
*": Access
"7
*": Play
"8
*": Pause
"9
*": Manual search (Play)
M0 =
(a)
(b)
(c)
(d)
* ******
D0 =
(a)
(b)
(c)
(d)
* ******


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­ 4 ­
TABLE OF CONTENTS
SELF DIAGNOSTICS ...................................................... 2
1.
SERVICING NOTES ............................................... 4
2.
GENERAL ................................................................... 6
3.
DISASSEMBLY ......................................................... 8
4.
TEST MODE .............................................................. 21
5.
ELECTRICAL ADJUSTMENTS
MD Section ..................................................................... 24
CD Section ...................................................................... 29
6.
DIAGRAMS
6-1. Printed Wiring Board ­ BD (CD) Section ­ .................. 31
6-2. Schematic Diagram ­ BD (CD) Section ­ ...................... 33
6-3. Printed Wiring Boards ­ BD (MD) Section ­ ............... 36
6-4. Schematic Diagram ­ BD (MD) Section ­ .................... 39
6-5. Schematic Diagram ­ SUB Section ­ ............................. 44
6-6. Printed Wiring Board ­ SUB Section ­ ......................... 49
6-7. Printed Wiring Boards ­ MAIN Section ­ .................... 52
6-8. Schematic Diagram ­ MAIN Section ­ .......................... 55
6-9. Schematic Diagram ­PANEL Section ­ ......................... 60
6-10. Printed Wiring Boards ­ PANEL Section ­ .................. 65
6-11. Printed Wiring Boards
­ CD (Motor/ Sensor) Section ­ .................................... 67
6-12. Schematic Diagram
­ CD (Motor/ Sensor) Section ­ ..................................... 69
6-13. Printed Wiring Boards
­ MD (Motor/ Sensor) Section ­ .................................... 71
6-14. Schematic Diagram
­ MD (Motor/ Sensor) Section ­ .................................... 73
6-15. Printed Wiring Boards
­ POWER/AMPLIFIER Section ­ ................................. 75
6-16. Schematic Diagram
­ POWER/AMPLIFIER Section ­ ................................. 77
6-17. Printed Wiring Boards
­ DETACHABLE CONTROLLER Section
(RM-MD515) ­ .............................................................. 79
6-18. Schematic Diagram
­ DETACHABLE CONTROLLER Section
(RM-MD515) ­ ............................................................... 81
6-19. IC Pin Function Description ........................................... 92
7.
EXPLODED VIEWS ............................................... 107
8.
ELECTRICAL PARTS LIST .............................. 117
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
The laser diode in the optical pick-up block may suffer electro-
static break-down because of the potential difference generated
by the charged electrostatic load, etc. on clothing and the human
body.
During repair, pay attention to electrostatic break-down 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.
NOTES ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc reflective surface by the objective lens in the optical
pick-up block. Therefore, when checking the laser diode emis-
sion, observe from more than 30 cm away from the objective lens.
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 the soldering iron around 270 °C dur-
ing 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-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.
SECTION 1
SERVICING NOTES


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­ 5 ­
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may
result in hazardous radiation exposure.
This appliance is classified as a CLASS 1 LASER product.
The CLASS 1 LASER PRODUCT MARKING is located on
the rear exterior.
Laser component in this product is capable of emitting radiation
exceeding the limit for Class 1.
The following caution label is located inside the unit.
MODEL IDENTIFICATION
­ Back Panel ­
MODEL
PARTS No.
AEP, UK, German and
North European models
4-993-619-1
Malaysia and Singapore models
4-993-619-2
Hong Kong model
4-993-619-3
US model
4-993-619-4
Tourist model
4-993-619-6
PART No.
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 microampers.).
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" indica-
tion is 0.75 V, so analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex-
amples of a passive VOM that is suitable. Nearly all battery
operated digital multimeters that have a 2 V AC range are suit-
able. (See Fig. A)
Fig. A.
Using an AC voltmeter to check AC leakage.
1.5 k
0.15
µF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground