Sony HCD-H881 Service Manual

MICROFILM
HCD-H881/H881D
RVC
ANA
—
@ HCD-H881/H881D is the tuner,
deck, CD and amplifier section in
MHC-81 1, MHC-D7 and MHC-G8s.
Dolby noise
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol 0) are trademarks of
Dolby Laboratories Licensing Corporation.
for the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION :
with 8 ohm loads, both channels driven,
from 40 - 20kHz ; rated 100 watts per
channel minimum RMS power, with no
more then 0.9 % total harmonic distortion
from 250 milliwatts to rated output.
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
Wavelength 780-790 nm
Frequency response
2Hz- 20 kHz (+0.5 dB)
Signal-to-noise ratio
More than 90 dB
Dynamic range More than 90 dB
CD DIGITAL OUT OPTICAL
(Square optical connector jack, rear panel)
Wavelength 600 nm
Output Level -18 dBm
Tuner section
FM stereo, FM /AM superheterodyne
tuner
FM tuner section
Tuning range US, Canadian model :
87.5- 108MHz (100kHz step)
EXCEPT US, Canadian,
East European model :
87.5- 108MHz (50kHz step)
East European model :
FM 1 : 65— 74MHz (10kHz step)
FM 2: 87.5~ 108MHz (50kHz step)
reduction manufactured under license from
MHe-881
Photo : HCD-H881
Tape deck
Section
SPECIFICATIONS
Antenna FM lead antenna
Antenna terminals
75 ohm unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range US, Canadian model :
531- 1,710kHz (with the tuning
interval set at 9kHz)
530- 1,710kHz (with the tuning
interval set at 10kHz)
AEP, UK, East European, German model :
MW : 53i- 1,602kHz (with the
tuning interval set at 9kHz step)
LW : 153- 279kHz
Italian model :
MW : 522~ 1,611kHz (with the
tuning interval set at 9kHz step)
LW : 153- 279kHz
E, Saudi Arabia, Argentine, Hong Kong,
Malaysia, Taiwan, Singapore, Australian,
Tourist, Indonesia, CIS, Mexican,
Thailand model :
531 - 1,602 kHz (with the
tuning interval set at 9 kHz)
530 - 1,710 kHz
(with the tuning interval set
at 10 kHz)
SW :5.95- 17.90MHz
(E3, Saudi Arabia, Hong Kong, Tourist,
Malaysia, Singapore, Indonesia, CIS model)
an Model Name Using Similar Mechanism
, CD Mechanism Type CDM38-5BD19
Section
ausaDI9
Model Name Using Similar Mechanism
Tape Transport Mechanism Type TCM-220WR2E
hear Ae
US Model
Canadian Model
HCD-H881/H881D
AEP Model
UK Model
E Model
Australian Model
Tourist Model
HCD-H881
Antenna AM loop antenna,
External antenna terminals
Intermediate frequency
450 kHz
Amplifier section
AEP, UK, German, Italian, East European, CIS model :
DIN 50W+50W (8 ohm, 1kHz, 0.8% THD)
RMS 60W+60W (8 ohm, 1kHz, 10% THD)
MUSIC power output
105W+105W (8 ohm, 1kHz, 10% THD)
US, Canadian model :
FTC 100W+100W (8 ohm, 40- 20kHz, 0.9% THD)
Continuous RMS _ power output
120W+120W (8 ohm, 1kHz, 5% THD)
Other model
Peak music power output
1200 W
Continuous RMS power output
80 W + 80 W (8 ohm atl
kHz, 5 % THD)
Inputs
VIDEO/MD IN (phono jacks):
voltage 450 mV,
impedance 47 kilohm
MIX MIC (phone jacks):
sensitivity 1 mV,
impedance 10 kilohm
— Continued on page 2 —
MINI HiFi COMPONENT SYSTEM
SONTY.

Sony HCD-H881 Specifications

General

Brand	Sony
Model	HCD-H881
Category	Stereo System
Language	English

Summary

Safety-Related Component Warning!!

Safety Check-out

Leakage Test

Procedure to test AC leakage from exposed metal parts to earth ground and other parts.

Section 1 Servicing Notes

Notes on Handling the Optical Pick-up Block or Base Unit

Precautions for handling the optical pick-up block and flexible boards.

Notes on Laser Diode Emission Check

Guidelines for safely checking laser diode emission.

Section 3 Disassembly

3-1. Front Panel Removal

Step-by-step guide with diagram for removing the front panel.

3-2. CD Block Removal

Diagram showing the procedure for removing the CD block mechanism.

3-3. Lid (A)/(B) Assy, Cassette, Mechanism Deck Block and HP/MIC Board Removal

Steps to remove cassette lids, mechanism deck, and HP/MIC board.

Section 4 Adjustments

4-1. Mechanical Adjustments

Procedures for mechanical adjustments like torque and tape tension measurement.

4-2. Electrical Adjustments

Electrical adjustments for the deck section, including switch positions and test points.

Playback Mode

Detailed steps for playback mode adjustments using test tapes and oscilloscopes.

Tape Speed Adjustment

Procedure for adjusting tape speed for both high and normal speed playback.

Playback Level Adjustment

Steps to adjust playback level and channel difference for proper output.

Record Bias Adjustment

Procedure for adjusting record bias and output levels for record mode.

Record Level Adjustment

Procedure for adjusting record level and confirming playback output.

Tuner Section Precautions In Repairing

MW Tuned Indication Lighting Level

SW Control Voltage Adjustment

SW Tracking Adjustment

FM Tuned Indication Lighting Level

FM Poler Adjustment (CIS model only)

CD Section

Focus Bias Adjustment

Procedure for adjusting focus bias when the optical block is replaced.

RF Level Check

Procedure to check RF signal level and waveform clarity.

S-Curve Check

Procedure to check S-curve symmetry and peak-to-peak level.

E-F Balance Check

Procedure to check traverse waveform symmetry and level.

Focus/Tracking Gain Adjustment

Section 6 Diagrams

6-1. Block Diagram - CD Section - Optical Pick-up Block

Continuation of the CD optical pick-up block diagram, showing signal processing and motor drives.

6-2. Block Diagram - Main Section (1) -

Continuation of the main section block diagram, detailing AM/FM IF, mixer, and VCO circuits.

6-3. Block Diagram - Main Section (2) -

Continuation of the main section block diagram, showing power supply, control logic, and speaker output stages.

6-7. Schematic Diagram - Main Section (1/2)

Continuation of the main board schematic, showing digital echo, delay, and control logic circuits.

6-6. Schematic Diagram - Main Section (2/2)

Continuation of the main board schematic, showing motor drivers, volume control, and interface circuits.

6-11. Schematic Diagram - BD Section

Schematic diagram for the BD section, illustrating ICs and signal paths.

Waveforms - BD Section

6-12. Schematic Diagram - TCB Section

Further continuation of TCB section schematic, detailing tuning level and control signals.

6-15. Schematic Diagram - Power Section

6-16. Schematic Diagram - Audio Section

Waveforms - Audio Section -

6-18. Schematic Diagram - Polar Section

BD SECTION

TCB SECTION

POWER SECTION

MAIN SECTION

Section 7 Exploded Views

7-1. Chassis Section

7-2. Front Panel Section

7-3. Mechanism Deck Section-1 (TCM-220WR2E)

7-4. Mechanism Deck Section-2 (TCM-220WR2E)

7-5. Disc Table Assy Section (CDM38-5BD19)

7-6. CDM Chassis Section (CDM38-5BD19)

7-7. Base Unit Section (BU-5BD19)