7.2CD Module

CD MODULE

NO DISC

POWER ON

DISC NO

DETECTION

STARTS?

YES

NO

DISPLAY?

YES

PRESS

<OPEN/CLOSE>

CHECK FLEX CONNECTION FROM CDR MAIN BOARD

POWER SUPPLY

+5V, +12V AT TESTPOINTS 28 AND 27 +5V AT CONN. 1000 PINS 1 AND 3 +5V AT IC7005 PIN 14

+3V3 AT IC7000 PINS 5,17,21,57, CHECK SAFETY RESISTORS

+5V AT IC7020 PIN 25

+10V AT IC7020 PINS 26, 27, 28

+12V AT IC7021 PIN 5, CHECK SAFETY RESISTOR R3131

+12V AT IC7022 PIN 5, CHECK SAFETY RESISTOR R3154

+5V AT IC7025 PIN 16

+5V AT IC7202 PIN 38, CHECK SAFETY RESISTOR R3308

+3V3 AT IC7309 PINS 4 AND 13, CHECK SAFETY RESISTORS R3215, R3216 +12V AT IC7120 PIN 8, CHECK SAFETY RESISTOR R3263

CLOCKS

8.4672MHz AT TESTPOINT 7 12MHz AT TESTPOINTS 29 AND 30 11.2896 AT TESTPOINT 10 2.1168MHz AT TESPOINT 20 44.1kHz AT TESTPOINT 21

DISPLAY

SEE FAULTFINDING GUIDE DISPLAY BOARD

MICROPROCESSOR 7202

NO

TRAY?

YES

LOAD DISC

(CD-DA OR PARTIALLY RECORDED CD-R/CD-RW)

PRESS <OPEN/CLOSE>

NO

TOC?

YES

SEE NEXT PAGE:

PLAYBACK

DIAGNOSTIC SOFTWARE : MECHANICAL SERVICE DIAGNOSTICS CD LOADER : TRAY TEST

CHECK TRAY MOTOR VOLTAGES TRAY+, TRAY-

MICROPROCESSOR 7202

CHECK TRAY MOTOR DRIVER IC7021

REPLACE OR REPAIR CD LOADER ASSY:

TRAY MOTOR ASSY 02, BELT 11

DIAGNOSTIC SOFTWARE : MECHANICAL SERVICE DIAGNOSTICS CD LOADER : FOCUS TEST & SLEDGE TEST

CHECK WIRING TO CDM

CHECK POWER DRIVERS 7021, 7022, 7020

CHECK VOLTAGES ON POWER DRIVERS (SEE CIRCUIT DIAGRAMS)

TESTPOINTS 4, 5, 6 : PULSE DENSITY MODULATED SIGNALS

HF PATH

TESTPOINTS 1, 2, 3, 9 : EYEPATTERN

CHECK RW AT TESTPOINT 8 : HIGH FOR CDDA AND CDR DISC, LOW FOR CDRW DISC. EYEPATTERN OF CDRW DISC WILL BE AMPLIFIED ( »X 2.5). EYEPATTERN OF CDDA DISC WILL BE ATTENUATED(» X 0.8)

CHECK S1,S2 AT TESTPOINTS 25 AND 26 (SEE CIRCUIT DIAGRAMS) TESTPOINTS 20, 21, 22: I2S DATA, WCLK, SCLK

REPLACE OR REPAIR CD LOADER ASSY (CDM MECHANISM)

CL 96532086_030.eps 080999

Figure 7-5

14

Page 16
Image 16
Marantz DR-6000, MAR770 CD Module, Open/Close, Check Flex Connection from CDR Main Board Power Supply, Press OPEN/CLOSE

MAR770, MAR775, DR-6000 specifications

The Marantz DR-6050 and DR-6000 are revered components in the world of high-fidelity audio systems, reflecting the brand's long-standing commitment to quality and performance. These models have gained popularity among audiophiles for their comprehensive features and advanced technologies, which cater to both casual listeners and serious music enthusiasts.

The Marantz DR-6050 is a CD recorder and player that stands out with its dual functionality. It allows users to enjoy CDs while also having the capability to record directly from various sources, including analog inputs and digital connections. This functionality is essential for those who wish to preserve their vinyl records, cassettes, or other audio formats onto CD. The machine supports CD-R and CD-RW media, providing flexibility for repeated use and recording.

One of the standout technologies in the DR-6050 is its high-quality Digital-to-Analog Converter (DAC), which significantly enhances sound performance by converting digital signals to analog with incredible accuracy. This contributes to the unit's ability to reproduce audio with rich detail and clarity. Additionally, the recorder is equipped with a Microprocessor that ensures precise recording levels and optimizes the quality of the output.

On the other hand, the Marantz DR-6000 offers similar capabilities but with an emphasis on simplicity and ease of use. Designed for users who appreciate an intuitive interface, it features straightforward controls and an ergonomic design. The DR-6000 supports multiple recording formats, including standard audio CDs, making it versatile for various playback systems.

Both models are built with high-grade components that promise longevity and reliability. They feature robust construction, ensuring minimal vibration and interference to enhance playback quality. Integrated analog and digital inputs allow for diverse connectivity options, which is crucial for users with elaborate audio setups.

In terms of audio performance, both the DR-6050 and DR-6000 exhibit impressive frequency response and low distortion levels, characteristics that are vital for a satisfying listening experience. The devices also include features like playback speed control and disc finalization options, providing the user with complete control over their audio sessions.

The Marantz DR-6050 and DR-6000 are ultimate companions for those who appreciate high-quality sound and need versatile recording solutions. With their blend of advanced technologies, clear audio output, and user-friendly designs, they remain solid choices for anyone looking to enhance their audio collection and experience.