Read Harman Kardon HD 750 Service Manual online
MN662790RAS1
66
CLVS
O
Spindle servo phase synchronization signal output. "H" level: CLV. "L"
level: rough servo.
67
CRC
O
During default operation, subcode CRC check result output. "H" level: OK.
"L" level: no good.
During command execution, pulse output for external track counter.
68
DEMPH
O
De-emphasis detection signal output. "H" level: ON.
69
FLAG6 or
O
When IOSEL is "L" level, FLAG6 output, signal for resetting address of
RESY
RAM for error correction de-interleave. "L" level: address reset.
When IOSEL is "H" level, RESY output, frame resynchronization signal.
"H" level: synchronized. "L" level: out of sync.
70
IOSEL
I
Mode selection pin
71
TEST
I
Test pin.
Keep this at "H" level.
72
AV
DD1
I
Power supply for analog circuits. (common use for left and right channel
audio outputs.)
73
OUTL
O
Left channel audio output.
74 AV
SS1
I Ground for analog circuits. (common use for left and right channel audio
outputs.)
75
OUTR
O
Right channel audio output.
76
RSEL
I
RF signal polarity selection pin.
"H" level: bright level is "H."
"L" level: bright level is "L."
77 V
CC5V
I
5-V power supply applied to pins for 5-V input.
78
PSEL
I
When IOSEL is "H" level, test pin.
Keep this at "L" level.
When IOSEL is "L" level, SRDATA input.
79
MSEL
I
When IOSEL is "H" level, frequency selection pin for SMCK pin output.
"H" level: SMCK=8.4672 MHz
When IOSEL is "L" level, LRCK input.
"H" level: left channel data.
"L" level: right channel data.
SMCK output fixed at 4.2336 MHz.
80
SSEL
I
When IOSEL is "H" level, SUBQ pin output mode selection pin.
"H" level: buffered subcode Q mode.
"L" level: CLDCK synchronization mode.
When IOSEL is "L" level, BCKL input.
Buffered subcode Q mode.
Pin Descriptions (continued)
Pin No. Symbol I/O Function Description
HD750
20
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