Sony HCD-RG121 User Manual

SERVICE MANUAL
Sony Corporation
Home Audio Company
Published by Sony Engineering Corporation
AEP Model
UK Model
E Model
Australian Model
MINI HI-FI COMPONENT SYSTEM
9-877-658-01
2004D1679-1
© 2004.04
Ver 1.0 2004.04
SPECIFICATIONS
HCD-RG121
• HCD-RG121 is the tuner, deck, CD and
amplifier section in MHC-RG121.
Amplifier section
AUDIO POWER SPECIFICATIONS
D
IN power output (rated): 50 + 50 watts (6 ohms at
1kHz, DIN)
C
ontinuous RMS power output (reference):
65 + 65 watts (6 ohms at
1kHz, 10% THD)
M
usic power output (reference):
130 + 130 watts (6 ohms at
1kHz, 10% THD)
T
he following measured at AC 120, 127, 220, 240 V
5
0/60 Hz
D
IN power output (rated): 50 + 50 watts (6 ohms at
1kHz, DIN)
C
ontinuous RMS power output (reference):
60 + 60 watts (6 ohms at
1kHz, 10% THD)
CD player section
S
ystem Compact disc and digital
audio system
L
aser Semiconductor laser
(λ=780 nm)
Emission duration:
continuous
F
requency response 2 Hz – 20 kHz (±0.5 dB)
W
avelength 780 – 790 nm
S
ignal-to-noise ratio More than 90 dB
D
ynamic range More than 90 dB
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
North American model: 87.5 – 108.0 MHz
(100-kHz step)
Russian model: 65.0 – 74.0 MHz
(There is no stereo effec
t.
10-kHz step)
87.5 – 108.0 MHz
(50-kHz step)
Other models: 87.5 – 108.0 MHz
(50-kHz step)
Antenna FM lead antenna
Antenna terminals 75 ohms unbalanced
Intermediate frequency 10.7 MHz
Tape deck section
Recording system 4-track 2-channel, stereo
Frequency response 50 – 13,000 Hz (±3 dB),
using Sony TYPE I
cassettes
Model Name Using Similar Mechanism New
CD
CD Mechanism Type CDM74-K6BD80
Section
Optical Pick-up Name KSM-213DCP/Z-NP
Tape deck
Model Name Using Similar Mechanism New
Section
Tape Transport Mechanism Type CWM43FF-05
– Continued on next page –

Sony HCD-RG121 Specifications

General

Type	Mini Hi-Fi System
Power Output	120W
CD Player	Yes
Tuner	FM/AM
Bluetooth	No
USB Port	No
Output Power (per channel)	30W
Cassette Deck	Yes
Remote Control	Yes
Audio Channels	2.0
MP3 Playback	Yes
Functions	CD

Summary

SPECIFICATIONS

Amplifier Section Specifications

Details amplifier output power specifications, including DIN and RMS ratings.

CD Player Section Specifications

Specifications for the CD player mechanism, laser, and frequency response.

Tape Deck & Tuner Specifications

Specifications for the tape deck and tuner sections, including frequency ranges.

GENERAL INFORMATION & SAFETY

Handling and Repair Precautions

Notes on handling optical pick-up, laser diode, and circuit board repairs.

Component Replacement & Safety Warnings

Guidelines for replacing chip components and critical safety warnings.

CD Tray Lock Function

Method to lock and unlock the CD disc tray for security purposes.

SERVICE & TEST PROCEDURES

Service Positions

Recommended physical orientations for servicing internal components.

Button Location Guide

Guide to button locations and their corresponding page references on the main unit.

System Test Modes & Reset Procedures

Procedures for activating system test modes, resets, and special functions.

DIAGRAMS & SCHEMATICS

Unit Disassembly Steps

Step-by-step instructions for disassembling the unit, detailing component removal order.

System Block Diagrams

High-level block diagrams illustrating the interconnections of major system sections.

Circuit Schematics & PWB Layouts

Detailed circuit schematics and printed wiring board layouts for various sections.

EXPLODED VIEWS & PARTS LIST

Exploded Views of Unit Sections

Visual guides showing the assembly of unit sections, referencing part numbers.

Electrical Parts List

Comprehensive list of electrical components, part numbers, and descriptions.