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NAD Manuals
Receiver
T 763
Service manual
Special Function; Details & Waveforms On System Test & Debugging - NAD T 763 Service Manual
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Service manual
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SPECIAL FUNCTION
FEATURE
A A
RESET FOR AH VERSION
RESET FOR C VERSION
NTSC / PAL SELECTION
VFD ALL DISPLAY
AM FREQ. STEP
DETAILS & WAVEFORMS ON SYSTEM TEST & DEBUGGING
T89C51RD2 (U202) main clock is at 20MHz (X202)
T89C51RD2 (U201) main clock is at 20MHz (X201)
UPPER - +5V supply to KEYBOARD when power up
LOWER - RESET line (TCM810LENB713) when
power up
NOTE: The waveforms are based on software version V2.13V.
KEYS PRESS ON FRONT PANEL
VIDEO + TONE DEFEAT
VIDEO + TONE CONTROLS
VIDEO + MEMORY
AUDIO + TAPE MONITOR
AM/FM + FM MUTE
UPPER - OUTPUT ENABLE (pin 24) of EPROM
(W27C02) when changing SURROUND MODES
LOWER - CHIP ENABLE (pin 22) of EPROM
(W27C02) when changing SURROUND MODES
SCLK (pin 43 of CS49326)
LRCLK (pin 42 of CS49326)
MCLK (pin 30 of CS49326)
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