Teac PD-H500C, Руководство по обслуживанию

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SERVICE MANUAL
7
PIN No. SYMBOL I/O FUNCTION DESCRIPTION REMARKS
Power supply input terminal.
RF amplitude adjustment control signal input termi-
nal.
Controlled by 3-PWM signals.
(PWM carrier = 88.2kHz)
Open loop gain adjustment terminal for AGC amp.
Main beam l-V amp input terminal.
Main beam l-V amp input terminal.
Sub beam l-V amp input terminal.
Sub beam l-V amp input terminal.
Monitor photo diode amp input terminal.
Laser diode amp input terminal.
Laser diode control signal input terminal and APC
circuit ON/OFF control signal terminal.
Tracking error balance adjustment signal input ter-
minal. Controlled by 3-PWM signal.
(PWM carrier = 88.2 kHz)
Reference voltage (2VRO) output terminal.
2VRO = 4.2 V when Vcc = 5 V
TE amp negative input terminal.
TE error signal output terminal.
Sub beam adder signal output terminal.
Focus error signal output terminal.
FE amp negative input terminal.
RFRP output circuit suitching terminal.
TA2150FN
VCC
RFGC
GMAD
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
SBAD
FEO
FEN
SEB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
-
3 signals input.
(2VRO, VRo, GND)
(Note 1)
Connected to pin diode
output B + D
(through resistor)
Connected to pin diode
output A + C
(through resistor)
Connected to pin diode
output F.
Connected to pin diode
output E.
Connected to pin monitor
photo diode.
Connected to laser diode
control circuit.
3 signals input.
(Vcc, Hiz, GND)
3 signals input
(2VRO, VRO, GND)
-
Connected to TEO through
feedback resistor.
-
-
-
Connected to FEO through
feedback resistor.
Low (GND) is for normal use.
-
I
l
l
l
l
l
l
O
l
l
O
l
O
O
O
l
l
SEL
LEVEL
APC
CIRCUIT
LDO
DETECT
FREQUENCY
GND
OFF
Connected to Vcc
through resister (1 k )
Low
Hiz ON Control signal output
Low
Vcc ON
Control signal output
High
SEB LEVEL
GND
GND
GND
GND GND GND
BOTTON
DETECTION
PEAK
DETECTION