Philips Magnavox AZ 7266, Service Manual

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PINNING OF INTEGRATED CIRCUITS
SAA7372 – DECODER AND DIGITAL SERVO IC CD7
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 VSSA1 GND supply (analog) of CD7
2 VDDA1 +3.5 supply (analog) of CD7
3 D1 CD-drive
→
CD7 unipolar current input (central diode signal input)
4 D2 CD-drive
→
CD7 unipolar current input (central diode signal input)
5 D3 CD-drive
→
CD7 unipolar current input (central diode signal input)
6 VRL GND reference input for ADC
7 D4 CD-drive
→
CD7 unipolar current input (central diode signal input)
8 R1 CD-drive
→
CD7 unipolar current input (satellite diode signal input)
9 R2 CD-drive
→
CD7 unipolar current input (satellite diode signal input)
10 IREFT
→
CD7 current reference for calibration ADC
11 VRH reference output from ADC
12 VSSA2 GND supply (analog) of CD7
13 SELPLL +3.5 selects whether internal clock multiplier PLL is used
14 ISLICE CD7
→
current feedback from data slicer
15 HFIN
→
CD7 comparator signal input
16 VSSA3 GND supply (analog) of CD7
17 HFREF
→
CD7 comparator common mode input
18 IREF
→
CD7 reference current pin (nom. VDD/2)
19 VDDA2 +3.5 supply (analog) of CD7
20 TEST1 GND test control input
21 CRIN X-Tal
→
CD7 crystal/resonator input
22 CDOUT X-Tal
→
CD7 crystal/resonator output
23 TEST2 GND test control input
24 CL16 CD7
→
16.9344MHz system clock output
25 CL11 CD7
→
11.2896MHz or 5.6448MHz clock output (3-state)
26 RA CD7
→
servo driver radial actuator output
27 FO CD7
→
servo driver focus actuator output
28 SL CD7
→
servo driver slide actuator output
29 TEST3 GND test control input
30 VDD1P +3.5 supply (digital) of CD7
31 DOBM CD7
→
bi-phase mark output (3-state)
32 VSS1 GND supply (digital) of CD7
33 MOTO1 CD7
→
servo driver motor output1 of CD7; versatile (3-state)
34 MOTO2 CD7
→
motor output2 of CD7; versatile (3-state)
35 SBSY CD7
→
subcode block sync (3-state)
36 SFSY CD7
→
subcode frame sync (3-state)
37 RCK
→
CD7 subcode clock input
38 SUB CD7
→
P to W subcode bits (3-state)
39 VSS2 GND supply (digital) of CD7
40 V5 CD7
→
versatile output pin of CD7
41 V4 CD7
→
versatile output pin of CD7
42 V3 CD7
→
versatile output pin of CD7 (open drain)
43 KILL CD7
→
kill output; programmable (open drain)
44 MISC CD7
→
C2 error flag; output only defined in CD-ROM modes (3-state)
45 DATA CD7
→
DAC serial data output (3-state)
46 WCLK CD7
→
DAC word clock output (3-state)
47 VDD2P +3.5 supply (digital) of CD7
48 SCLK CD7
→
DAC serial bit clock output (3-state)
49 VSS3 GND supply (digital) of CD7
50 CL4 CD7
→
4.2336MHz µP clock output
51 SDA µP
→
CD7 µP interface data I/O line (open drain output)
52 SCL µP
→
CD7 µP interface clock line
53 RAB µP
→
CD7 µP interface R/W and load control line
54 SILD µP
→
CD7 µP interface R/W and load control line
55 NC no connection
56 VSS4 GND supply (digital) of CD7
57 RESET µP
→
CD7 power-on reset input (active low)
58 STATUS CD7
→
µP servo interrupt request line/CD7 status register output (open drain)
59 VDD3C +3.5 supply core (digital)
60 C2FAIL CD7
→
indication of correction failure (open drain)
61 CFLG CD7
→
correction flag output (open drain)
62 V1
→
CD7 versatile input pin
63 V2
→
CD7 versatile input pin
64 LDON CD7
→
Laser supply laser drive on output (open drain)
MPC1718 – 4-STAGE PWM SERVODRIVER
Pin Name Direction Description
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1 Hin2
→
servo driver power supply for H-bridge output section 2
2 Hout2A servo driver
→
disc motor H-bridge PWM output 2A
3 DCout2 DC/DC converter 2
→
LC-filter connects H-bridge DC/DC converter 2 to LC-filter
4 Vin +A power supply for servo driver
5 DCout1 DC/DC converter 1
→
LC-filter connects H-bridge DC/DC converter 1 to LC-filter
6 Gnd1,2 GND ground for H-bridge section 1 and 2
7 Hout1A servo driver
→
focus servo H-bridge PWM output 1A
8 Hin1
→
servo driver power supply for H-bridge output section 1
9 Hout1B servo driver
→
focus servo H-bridge PWM output 1B
10 Vout servo driver
→
PWM output of DC/DC converter of VLG power supply
11 DTC
→
servo driver dead time control pin (used to set duty value of Vout output)
12 FBout servo driver
→
feedback for DC/DC converter of VLG power supply
13 INM
→
servo driver inverting input for DC/DC converter of VLG power supply
14 INP
→
servo driver non-inverting input for DC/DC converter of VLG power supply
15 VBias servo driver
→
bias stabilizing capacitor connection pin for DC/DC converter
16 Vd servo driver
→
+S power switch output pin of servo driver
17 S.Gnd GND ground for internal logic of servo driver
18 Vref servo driver
→
+1.2 band-gap reference voltage output of servo driver
19 VG +VG
→
servo driver gate drive power supply for output transistor,
power is supplied by using the Cg pin to form a charge pump.
20 Cg servo driver
→
charge pump step-up capacitor connection
21 Vreg servo driver
→
+1.8 regulator output pin
22 Cosc servo driver
→
sawtooth waveform output, synchronized to the clock
23 Sync
→
servo driver external clock input for separate excitation
24 Power µP
→
servo driver power control pin (low-active)
25 Hout3B servo driver
→
track servo H-bridge PWM output 3B
26 Hin3
→
servo driver power supply for H-bridge output section 3
27 Hout3A servo driver
→
track servo H-bridge PWM output 3A
28 Gnd3,4 GND ground for H-bridge section 3 and 4
29 DCout3 DC/DC converter 3
→
LC-filter connects H-bridge DC/DC converter 3 to LC-filter
30 Vin +A power supply for servo driver
31 DCout4 DC/DC converter 4
→
LC-filter connects H-bridge DC/DC converter 4 to LC-filter
32 Hout4A servo driver
→
slide servo H-bridge PWM output 4A
33 Hin4
→
servo driver power supply for H-bridge output section 4
34 Hout4B servo driver
→
slide servo H-bridge PWM output 4B
35 Lim2,4 +LF input pin, limits LC-filter output voltages of sections 2 and 4
36 Vinp3 CD7
→
servo driver control input pin, receives track servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
37 Vinp4 CD7
→
servo driver control input pin, receives slide servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
38 VLG +3.5 power supply for motor control circuit
39 S.Gnd GND ground for internal logic of servo driver
40 Vc DR_REF reference voltage for motor control circuit
41 Vinp2 CD7
→
servo driver control input pin, receives disc motor control signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
42 Vinp1 CD7
→
servo driver control input pin, receives focus servo signals from CD7
H-bridge output is controlled by voltage between this pin and Vc
43 Lim1,3 +LF
→
servo driver input pin, limits LC-filter output voltages of sections 1 and 3
44 Hout2B servo driver
→
disc motor H-bridge PWM output 2B
TDA1545A – CONTINUOUS CALIBRATION DAC
Pin Name Direction Description
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
1 BCK CD7
→
DAC bit clock input of DAC
2 WS CD7
→
DAC word select input of DAC
3 DATA CD7
→
DAC data input of DAC
4 GND GND ground
5 VDD +LFD supply voltage
6 IOL DAC
→
left channel output
7 IREF DAC
→
reference voltage output
8 IOR DAC
→
right channel output
3-2 3-2
CS 46 173