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@
Display Driver
CIRCUIT DESCRIPTION
The BG-526GK display is driven by attaching the inversion
port to the output port of microprocessor wPD75108CW.
The time chart is as follows :
Key scan
Key scan
ON Time ; 400yusec
Blanking period : tOOyusec
DUTY = 1/11.25
Scanning frequency : 222Hz
@ Initial Status
1) Contents of the initial status
Function
Amplifier (AMP) section
AUDIO SELECTOR
TAPE 2 MONITOR
VIDEO SELECTOR
VOLUME
REAR VOLUME
BALANCE
AUDIO INJECTION
SURROUND
TUNER
OFF
VIDEO 1
—56dB
+0dB
CENTER
OFF
OFF
Equalizer (EQ) section
EQ MEMORY
MODE
EQ MEMORY
PRESET
EO
EQ PGM MEMORY
'EQ ON/DEFEAT
EQ REC ON/OFF
Display mode
PGM
Not in PRESET recali status.
+0dB FLAT
+0dB FLAT
DEFEAT
OFF
SPI
Tuner section
Receiving frequency.
TUNING MODE
1-10/11-20
Lower limit of the FM frequency range.
AUTO
1-10
Power supply
OFF
Key scan
Key scan
2) Initial status setup
Setting of the initial status will be performed: in a follow-
ing cases :
1. When
the memory
contents
backed
up has been cac-
celled.
2. When the power cord is plugged into the AC outlet while
the MEMORY
key on the tuner is being depressed.
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