JVC RC-BM5 Service Manual page 24

RC-BM5
Pin No. Symbol
50 V
SSD2
51 DOBM
52 V
DDD1(P)
53 CFLG
54 RA
55 FO
56 SL
57 V
DDD2(C)
58 V
SSD3
59 MOTO1
60 MOTO2
61 V4
62 V5
63 V1
64 LDON
AN7312 (IC601) : Dual recording/Playback pre-amplifier circuit with ALC
1. Terminal layout
~
14
~
1
3. Pin function
Pin No.
1 GND
2 ALC time constant
3 ALC input Ch.1
4 Output Ch.1
5 Phase compensation Ch.1
6 N.E.B. Ch.1
7 Input Ch.1
8 Input Ch.2
9 N.E.B. Ch.2
10 Phase compensation Ch.2
11 Output Ch.2
12 ALC input Ch.2
13 Ripple filter
14 Vcc
1-24
I/O
- Digital ground 2
O Bi-phase mark output (externally buffered;3-state)
- Digital supply voltage 1 for periphery
O Correction flag output (open-drain)
O Radial actuator output
O Focus actuator output
O Sledge control output
- Digital supply voltage 2 for core
- Digital ground 3
O Motor output 1;versatile (3-state)
O Motor output 2;versatile (3-state)
O Versatile output 4
O Versatile output 5
I Versatile input 1
O Laser drive on output (open-drain)
2. Block diagram
8
7
Symbol I/O
- GND
- ALC time constant by resistance and capacitor
I Right channel ALC input
O Right channel output
- Not connect
I Right channel negative feed back input
I Right channel signal input
I Left channel signal input
I Left channel negative feed back input
- Not connect
O Left channel output
I Left channel ALC input
- Ripple filter
- Power supply
Function
Vcc
14 13 12 11 10
Amp.
Ripple Filter
Ch2
ALC
Amp.
Ch1
1 2 3 4 5
GND
Function
9 8
6 7