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2

FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range

87.5 - 108.0 MHz
(50-kHz step)

Antenna

FM wire antenna

Antenna terminals

75 ohms unbalanced

Intermediate frequency

10.7 MHz

AM tuner section
Tuning range
European model:

531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)

Other models:

530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)

Antenna

AM loop antenna, external
antenna terminal

Intermediate frequency

450 kHz

Power requirements
European model:

230 V AC, 50/60 Hz

Other models:

110 – 120 V or
220 – 240 V AC,
50/60 Hz
Adjustable with voltage
selector

Power consumption
European model:

See the name plate
0.3 watts (at the Power
Saving mode)

Other models:

See the name plate

Dimensions (w/h/d) incl. projecting parts and controls
Amplifier/Tuner/Tape/MD/DVD section:

Approx. 159 

× 216.5 ×

330 mm

Mass

Approx. 5.9 kg

Design and specifications are subject to change
without notice.

Recording system

4-track 2-channel stereo

Frequency response

50 – 13,000 Hz (

±3 dB),

using Sony TYPE I
cassettes

0

0

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 laser diode in the optical pick-up block may suffer electrostatic
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.

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 emission,
observe from more than 30 cm away from the objective lens.

Never look into the laser diode emission from right above when
checking it for adjustment. It is feared that you will lose your sight.

Use of controls or adjustments or performance of procedures
other than those specified herein may result in hazardous radiation
exposure.

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be

damaged by heat.

This caution
label is
located inside
the unit.

When replacing the DVD board, since the adjustment value is not
set up correctly, “Drive Auto Adjustment” can’t be performed.
In this case, initialize Memory in the following procedures.

Procedure:
1. Set the DVD Service Mode. (See page 44)
2. Press the [2] key of the remote commander, and set the “DRIVE

MANUAL OPERATION”. (See page 49)

3. Press the [6]  key of the remote commander, and set the “6.

Memory Check”. (See page 51)

4. Press the [CLEAR] key of the remote commander, and initialize

Memory.

3

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········································································ 13

······························································ 16

3-1. Case (R), Case (L), Top Cover Section ······························ 17
3-2. Front Panel Section, Back Panel Section ··························· 17
3-3. VIDEO Board, OPTICAL Board ······································ 18
3-4. SWITCH Board, JACK Board ··········································· 18
3-5. TC Board, Mechanism Deck (CMAL1Z228) ···················· 19
3-6. MAIN Board ······································································ 19
3-7. CONTROL Board ······························································ 20
3-8. POWER Board ··································································· 20
3-9. DIGITAL Board ································································· 21
3-10. MD Mechanism Deck (MDM-7B4M) ······························ 21
3-11. DVD Board ········································································ 22
3-12. DVD Mechanism Deck (CDM55A-DVBU8) ··················· 22
3-13. Holder Assy ······································································· 23
3-14. BD Board ··········································································· 23
3-15. Over Light Head (HR901) ················································· 24
3-16. OP-SUB Assy ···································································· 24
3-17. Loading Motor Assy (M703), Spindle Motor Assy (M701),

Sled Motor Assy (M702) ······················································ 25

3-18. LOADING Board, Motor (LD) Assy (M901) ··················· 25
3-19. RF-240 Board ···································································· 26
3-20. Tray ···················································································· 26
3-21. Optical Pick Up (KHM-240AAA(TYPE A))

(KHM-270AAA(TYPE B)) ···················· 27

··································································· 28

······························ 33

······································································ 54

6-1. CIRCUIT BOARDS LOCATION ····································· 54
6-2. Block Diagrams ································································· 55
6-3. Schematic Diagram  – RF-240 Board – ····························· 60
6-4. Printed Wiring Board  – RF-240 Board – ·························· 61
6-5. Schematic Diagram  – BD Board (1/2) – ·························· 62
6-6. Schematic Diagram  – BD Board (2/2) – ·························· 63
6-7. Printed Wiring Board  – BD (SIDE A) Board – ················ 64
6-8. Printed Wiring Board  – BD (SIDE B) Board – ················ 65
6-9. Schematic Diagram  – DVD Board (1/8) – ························ 66

6-10. Schematic Diagram  – DVD Board (2/8) – ························ 67
6-11. Schematic Diagram  – DVD Board (3/8) – ························ 68
6-12. Schematic Diagram  – DVD Board (4/8) – ························ 69
6-13. Schematic Diagram  – DVD Board (5/8) – ························ 70
6-14. Schematic Diagram  – DVD Board (6/8) – ························ 71
6-15. Schematic Diagram  – DVD Board (7/8) – ························ 72
6-16. Schematic Diagram  – DVD Board (8/8) – ························ 73
6-17. Printed Wiring Board  – DVD (SIDE A) Board – ············· 74
6-18. Printed Wiring Board  – DVD (SIDE B) Board – ············· 75
6-19. Schematic Diagram  – DIGITAL Board (1/2) – ················ 76
6-20. Schematic Diagram  – DIGITAL Board (2/2) – ················ 77
6-21. Printed Wiring Board  – DIGITAL (SIDE A) Board – ······ 78
6-22. Printed Wiring Board  – DIGITAL (SIDE B) Board – ······ 79
6-23. Schematic Diagram  – TC Board – ···································· 80
6-24. Printed Wiring Board  – TC Board – ································· 81
6-25. Schematic Diagram  – MAIN Board (1/2) – ····················· 82
6-26. Schematic Diagram  – MAIN Board (2/2) – ····················· 83
6-27. Printed Wiring Board  – MAIN Board – ··························· 84
6-28. IC Block Diagrams ···························································· 85
6-29. Schematic Diagram  – CONTROL Board (1/2) – ············· 88
6-30. Schematic Diagram  – CONTROL Board (2/2) – ············· 89
6-31. Printed Wiring Board  – CONTROL (SIDE A) Board – ··· 90
6-32. Printed Wiring Board  – CONTROL (SIDE B) Board – ··· 91
6-33. Schematic Diagram  – PANEL Section – ·························· 92
6-34. Printed Wiring Board  – PANEL Section – ······················· 93
6-35. Schematic Diagram  – OPTICAL Board – ························ 94
6-36. Printed Wiring Board  – OPTICAL Board – ····················· 95
6-37. Schematic Diagram  – POWER Section – ························· 96
6-38. Printed Wiring Board  – POWER Board – ························ 97
6-39. IC Pin Function Description ·············································· 98

··················································· 106

7-1. Case Section ···································································· 106
7-2. Front Panel Section ·························································· 107
7-3. Top Cover Section ··························································· 108
7-4. Chassis Section-1 ····························································· 109
7-5. Chassis Section-2 ····························································· 110
7-6. DVD Mechanism Deck Section (CDM55A-DVBU8) ···· 111
7-7. MD Mechanism Deck Section-1 (MDM-7B4M) ············ 112
7-8. MD Mechanism Deck Section-2 (MDM-7B4M) ············ 113

··································· 114

SILVER: KHM-240AAA (TYPE A)
BLACK: KHM-270AAA (TYPE B)

optical device

4

The sound source is a copy of a commercially
available music software or CD-R.

cThe Serial Copy Management System prevents

making a digital copy. In addition, you cannot 
copy from a CD-R.

No component is connected to the DIGITAL
OPTICAL IN jack, or you tried to record from the
digital component which is not connected
correctly.

cConnect the optional digital component correctly

to the DIGITAL OPTICAL IN jack using the
digital optical cable (not supplied).

The power of the connected component is not
turned on.

cCheck if the power of the connected digital

component is on. Refer to the operating
instructions supplied with the component.

The digital optical cable is disconnected, or the
power of the connected component is turned off
while recording the digital audio from the
component connected to the DIGITAL OPTICAL
IN jack.
cConnect the digital optical cable, or turn on the

power of the connected component.

The component has internal problem.

cConsult your nearest Sony dealer.

There is a problem with the laser pickup.

cThe laser pickup may be damaged. Consult your

nearest Sony dealer.

This system has a Self-diagnosis display
function to let you know if there is a system
malfunction. The display shows a code made
up of three or five letters and a message
alternately to show you the problem. To solve
the problem refer to the following list. If any
problem persists, consult your nearest Sony
dealer.

The MD is protected against erasure.
cRemove the MD and slide the tab to close the

slot. 

You tried to record a CD with a format that the
system does not support, such as a CD-ROM.

cRemove the disc and turn off the system once,

then turn it on again.

Recording could not be performed properly.

cMove the system to a stable place, and start

recording over from the beginning.

The MD is dirty or scratched, or the MD does not
meet the standards.

cReplace the MD and start recording over from

the beginning.

The MD deck cannot read the disc information
properly.

cRemove the MD once, then insert it again.

The MD deck cannot read the disc information
properly.
cReplace the MD.
cErase all the recorded contents of the MD using

the All Erase Function.

5

C:13:00

When the self-diagnosis function for DVD is
activated, a five-character service number (e.g.,
C 13 00) with a combination of a letter and
digits appears on the screen and the front panel
display. In this case, check the following table.

The disc is dirty

cClean the disc with a soft cloth.

The disc is not inserted correctly.

cRe-insert the disc correctly.

To prevent a malfunction, the system has
performed the self-diagnosis function.

cContact your nearest Sony dealer or local

authorized Sony service facility and give the 5-
character service number.
Example: E 61 10

One of the following messages may appear or
flash in the display during operation.

All the tracks on an MD are registered into groups.

The MD deck is pausing the recording because
silence continued for 30 seconds or more during
digital recording.

The inserted recordable MD is new, or all tracks on
the MD have been erased.

• A pre-mastered MD is in the deck.

• You tried to edit in Program or Shuffle Play

mode.

• The track is recorded in MDLP mode.

• A pre-mastered MD is in the deck.

• The function is switched to MD.

• There is no disc in the MD deck, or the MD is

protected against erasure.

• There is no time remaining on the MD.

The editing operation of the MD is completed.

There is no time remaining on the MD.

The MD deck is ejecting the MD.

An attempt was made to create a new group in
excess of the maximum number of groups, or there
are insufficient characters for updating the group
management information.

• You tried to make an impossible editing

operation.

• You cannot combine or erase the tracks due to

the system limitations of MDs.