Sony HCD-M70 - User Manual

SERVICE MANUAL
Tape player section
Recording system 4-track 2-channel stereo
Frequency response 50 - 13,000 Hz (±3 dB),
using a Sony TYPE I
cassette
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model: 87.5 - 108.0 MHz
(100-kHz step)
Other models: 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
Pan-American model: 530 - 1,710 kHz
(with the tuning interval
set at 10 kHz)
531 - 1,710 kHz
(with the tuning interval
set at 9 kHz)
European model: 531 - 1,602 kHz
(with the tuning interval
set at 9 kHz)
Amplifier section
For the U.S. model
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 6-ohm loads, both channels driven, from
70 - 20,000 Hz; rated 18 watts per channel
minimum RMS power, with no more than 0.9%
total harmonic distortion from 250 milliwatts to
rated output.
North American model:
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Total harmonic distortion less than 0.07% (6 ohms at
1 kHz, 12 W)
European model:
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
20 + 20 W
(6 ohms at 1 kHz, 10%
THD)
Music power output (reference):
40 + 40 W
DIN power output (rated): 15 + 15 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
18 + 18 W
(6 ohms at 1 kHz, 10%
THD)
The following measured at 220 V AC, 60 Hz
DIN power output (rated): 12 + 12 W
(6 ohms at 1 kHz, DIN)
Continuous RMS power output (reference):
15 + 15 W
(6 ohms at 1 kHz, 10%
THD)
Inputs
AUDIO IN MD (VIDEO) (phono jacks):
Sensitivity 500/250 mV,
impedance 47 kilohms
Outputs
OPTICAL DIGITAL OUT (CD):
Optical
PHONES: Accepts headphones with
an impedance of 8 ohms
or more
SPEAKER: 6 ohms
Other models:
The following measured at 230 V AC, 60 Hz
CD player section
System Compact disc and digital
audio system
Laser Semiconductor laser
(λ = 780 nm)
Emission
duration: continuous
Wavelength 780 - 790 nm
Frequency response 2 Hz - 20 kHz (±0.5 dB)
MICRO Hi-Fi COMPONENT SYSTEM
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
SPECIFICATIONS
HCD-M70
Ver 1.1 2002.03
9-873-633-02 Sony Corporation
2002C0500-1 Home Audio Company
C 2002.03 Published by Sony Engineering Corporation
HCD-M70 is the Amplifier, CD player, Tape
Deck and Tuner section in CMT-M70/M70K.
– Continued on next page –
CD
Model Name Using Similar Mechanism HCD-CP100
Section
CD Mechanism Type CDM55F-K6BD41A
Optical Pick-up Name KSS-213DCP
TAPE
Model Name Using Similar Mechanism NEW
Section

Summary

Specifications

Amplifier Section

Technical specifications for the amplifier, including power output and distortion.

Safety and Handling

Safety Check-out Procedures

Procedures for safety checks, including AC leakage testing.

Leakage Test

Detailed description of AC leakage testing methods and limits.

Safety-Related Component Warning

Warning about critical components for safe operation and replacement guidelines.

Disassembly

Disassembly Flow

Step-by-step flow chart for disassembling the unit.

Servicing Notes

Handling Optical Pick-up and Laser Diode

Precautions for handling optical pick-up and checking laser diode emission.

Test Modes

Cold Reset and LCD Check Mode

Procedures for cold reset and liquid crystal display check.

Aging Modes

Procedures for tape deck and CD aging modes.

Electrical Adjustments

Deck and CD Section Adjustments

Adjustments for deck and CD sections, including REC bias and focus bias.

Diagrams

CD Servo Block Diagram

Block diagram illustrating the CD servo section.

Tuner;Tape Deck Block Diagram

Main Section Block Diagram

Waveforms

Illustrations of key waveforms for different sections and modes.

IC Pin Function Description

Main Board IC801 Pin Functions

Detailed pin function description for the System Controller IC801.

Electrical Parts List

CD Section Parts

List of capacitors, connectors, ICs, transistors, and resistors for the CD section.

Control, Main, and Power Section Parts

Sony HCD-M70 Specifications

General

CD Player	Yes
Tuner	FM/AM
Cassette Deck	Yes
Bluetooth	No
USB Port	No
Remote Control	Yes
Type	Mini Hi-Fi System
Power Output	100 W
Speakers	2-way