8.1.3Display board troubleshooting guide

SWITCH POWER ON,

EXIT STAND BY

MODE

NO

DISPLAY?

YES

CHECK :

SUPPLY VOLTAGES

-35V± 5% at conn. JY01-2

3V8 ± 10% between conn. JY01-1 and JY01-3 +5V ± 5% at conn. JY01-10

CLOCK SIGNAL

8Mhz at pins 8, 9 of QY01

CONTROL SIGNALS

RESETN 3V3 (high) at conn. JY01-4 after start up I2C DATA at conn. JY01-5

I2C CLK at conn. JY01-7

FTD DRIVE LINES

Filament voltage 3V8 10% between pins 1-3 and pins 1-52 of the FTD (VX01)

Grid lines (see test instructions) Segment lines (see test instructions)

ELECTRICAL SERVICE DIAGNOSTICS - Local display test

KEYNO FUNCTIONS?

YES

REMOTE NO CONTROL?

YES

DISPLAY BOARD

OK

CHECK:

KEY MATRIX LINES (see test instructions)

ELECTRICAL SERVICE DIAGNOSTICS – Keyboard test

EASY JOG KNOB (see test instructions)

CHECK:

IR RECEIVER signal at pin 22 of QY01 ( see test instructions) ELECTRICAL SERVICE DIAGNOSTICS – Remote control est

CL 96532076_020.eps 290799

Figure 8-9 Display board troubleshooting’

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Marantz MAR770, DR-6000, MAR775 Display board troubleshooting guide, Clock Signal, Control Signals, FTD Drive Lines

MAR770, MAR775, DR-6000 specifications

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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.

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