Read Harman Kardon HD 750 Service Manual online
MN662790RAS1
Pin Descriptions (continued)
Pin No.
Symbol
I/O
Function Description
41
PLLF2
I/O
PLL loop filter characteristic selection pin.
42 TOFS O
Tracking offset adjustment or DSL balance output(D/A output).
43
WVEL
O
Double-speed status signal output.
"H" level: double-speed.
44
ARF
I
RF signal input.
45
I
REF
I
Reference current input pin.
46
DRF
I
DSL bias pin.
47
DSLF
I/O
DSL loop filter pin.
48
PLLF
I/O
PLL loop filter pin.
49
VCOF
I/O
VCO loop filter pin.
50
AV
DD2
I
Power supply for analog circuits (DSL, PLL, D/A converter output, and A/D
converter).
51
AV
SS2
I
Ground for analog circuits (DSL, PLL, D/A converter output, and A/D
converter).
52
EFM
O
EFM signal output. EFM output when IOSEL is "H" level.
or CK384
•
Crystal oscillator 16.9344-MHz clock output when I
•
OSEL is "L" level.
•
384 f
s
output from signal processing block. (During
variable-pitch operation, this is the VCO clock.)
Commands permit switching among the above three outputs.
53
PCK
O
PLL derived clock or DSL balance output. f
PCK
=4.3218 MHz.
or DSLB
54
VCOF2
I/O
VCO loop filter pin.
55
SUBC
O
Subcode serial output.
56
SBCK
I
Serial clock input for subcode serial output.
57
V
SS
I
Ground for oscillator circuit.
58
X1
I
Crystal oscillator circuit input/output pins. f=16.9344 MHz, 33.8688 MHz.
59
X2
O
Crystal oscillator circuit output/output pins. f=16.9344 MHz, 33.8688 MHz.
60
V
DD
I
Oscillator circuit power supply.
61
BYTCK or
O
When IOSEL is "H" level, byte clock signal output.
TRVSTOP
When IOSEL is "L" level, traverse stop signal output. "H" level: stop mode.
62
CLDCK
O
Subcode frame clock signal output pin. (f
CLDCK
=7.35 kHz)
63
FCLK
O
Crystal frame clock signal output. (f
FCLK
=7.35 kHz)
64
IPFLAG
O
Interpolation flag signal output. "H" level: interpolation.
65
FLAG
O
Flag signal output.
33
TE
I
Tracking error signal input.
(analog input)
34
RFENV
I
RF envelope signal input.
(analog input)
35
VDET
I
Vibration detection signal input.
"H" level: vibration detected.
36
OFT
I
Offtrack signal input.
"H" level: offtrack.
37
TRCRS
I
Track cross signal input.
(analog input)
38
RFDET
I
RF detection signal input.
"L" level: detected.
39
BDO
I
Dropout signal input.
"H" level: dropout.
40
LDON
O
Laser ON signal output.
"H" level: ON.
HD750
19
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