Yamaha GX-700 Service Manual page 28

GX-700/GX-700VCD
IC5 : MN662741RPB1 [P.C.B. CD/VCD]
Signal Processor & Controller
Pin No. Name I/O
29 VREF I
30 FBAL O
31 TBAL O
32 FE I
33 TE I
34 RFENV I
35 VDET I
36 OFT I
37 TRCRS I
38 I
RFDET
39 BDO I
40 LDON O
41 O
TES
42 PLAY O
43 WVEL O
44 I
ARF
45 IREF I
46 DRF I
47 DSLF I/O
48 I/O
PLLF
49 VCOF I/O
50 AVDD2 I
51 AVSS2 I
52 EFM O
53 PCK O
54 TOFS O
55 O
SUBC
56 SBCK I
57 VSS I
58 X1 I
59 X2 O
60 VDD I
61 BYTCK O
62 O
CLDCK
63 O
FCLK
64 IPFLAG O
65 FLAG O
66 O
CLVS
67 CRC O
68 DEMPH O
69 O
RESY
70 IOSEL I
71 I
TEST
72 I
AVDD1
73 OUTL O
74 AVSS1 I
75 OUTR O
76 I
RSEL
77 CSEL I
78 PSEL I
79 I
MSEL
80 SSEL I
*1 These models used "L".
27
Reference voltage for D/A output section (TVD, ECS, TRD, FOD, FBAL, TBAL, TOFS)
Focus balance adjustment output
Tracking balance adjustment output
Focus error signal input
Tracking error signal input
RF envelope signal input
Vibration detection signal input
Off track signal input
Track cross signal input
RF detection signal input
Drop out signal input
Laser ON signal output
Tracking error shunt signal output
Play signal output
Double speed status signal output
RF signal input
Reference current input pin
Bias pin for DSL
DSL loop filter pin
PLL loop filter pin
VCO loop filter pin
Power supply for analog circuits (For DSL, PLL, A/D input blocks, and D/A output blocks)
GND for analog circuits (For DSL, PLL, A/D input blocks, and D/A output blocks)
EFM signal output At IOSEL = H : EFM signal output
PLL extraction clock output
Tracking offset adjustment output
Sub-code serial output
Clock input for sub-code serial output
GND for oscillation circuit
Crystal oscillation circuit input pin
Crystal oscillation circuit output pin
Power supply for oscillation circuit
At IOSEL = H : Byte clock signal output At IOSEL = L : Traverse stop signal output H : STOP mode
Sub-code frame clock signal output
Crystal frame clock signal output
Interpolation flag signal output
Flag signal output
Spindle servo phase synchronous status signal outut
Sub-code CRC check result output
De-emphasis detection signal output
At IOSEL = H : Frame resynchronizing signal RESY output
At IOSEL = L : Error correction, and deinterleave RAM address reset signal FLAG6 output
Mode selector pin
Test pin
Power supply for analog circuits
L-ch audio output
GND for analog circuits
R-ch audio output
RF signal polarity specification pin When the bright level is "H", RSEL = H
Crystal oscillation frequency specification pin (H : Crystal osillation frequency = 33.8688 MHz, L : Crystal osillation frequency = 16.9344 MHz)
At IOSEL = H : Test pin (Normally L)
At IOSEL = H : SMCK pin output frequency selector pin
At IOSEL = L : LRCK input H : L-ch data, L : R-ch data
At IOSEL = H : SUBQ pin output mode selector pin
At IOSEL = L : BCLK input Q-code buffer mode fixed
Function
At IOSEL = L : 16.9344 MHz clock output (*1)
H : CLV
H : OK
H : ON
H : Synchronous
(For audio output section) (Commonly used for L-ch and R-ch)
(For audio output section) (Commonly used for L-ch and R-ch)
At IOSEL = L : SRDATA input
H : SMCK = 8.4672MHz , L : SMCK = 4.2336MHz
SMCK = Fixed at 4.2336 MHz
H : Q-code buffer working mode
(Analog input)
(Analog input)
(Analog input)
H : Detect
H : Off track
L : Detect
H : Drop out
H : ON
H : Shunt
H : PLAY (NC)
L : Double speed (NC)
(NC)
(NC)
(+5)
(GND)
(f = 4.32MHz) (NC)
PCK
(NC)
(With pull-up resistor)
(f = 16.9344MHz, 33.8688MHz)
(f = 16.9344MHz, 33.8688MHz)
(+5)
(*1)
(f = 7.35kHz)
CLDCK
(f = 7.35kHz) (NC)
FCLK
H : Interpolation
(NC)
L : Rough servo (NC)
L : NG (NC)
(NC)
L : Asynchronous (*1)
L : Address reset generated
(*1)
(Normal : H) (+5)
When the bright level is "L", RSEL = L
(*1)
(*1)
(*1)