HCD-GX8000, HCD-RG77 - Sony Audio Service Manual (repair manual). Page 21

View Sony HCD-GX8000 / HCD-RG77 Service Manual online

21
HCD-GX8000/RG77
CD SECTION
Note:
1.
CD Block is basically designed to operate without adjustment. Therefore,
check each item in order given.
2.
Use LUV-P01 (4-999-032-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10M
 impedance.
4.
Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
S-CURVE  CHECK
Procedure :
1. Connect an oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (DVC) ( 1.65 V) by lead
wire.
3. Turn the power ON.
4. Load a disc (LUV-P01) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
5. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 2 
±
 0.5 Vp-p.
6. After check, remove the lead wire connected in step 2.
Note:
• Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF  LEVEL  CHECK
Procedure :
1. Connect an oscilloscope CH1 to TP (RFDC) and CH2 to TP
(RFAC).
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
BD board
Oscilloscope
TP(FEO)
TP(DVC)
symmetry
S-curve waveform
within 2 
±
0.5Vp-p
A
B
TP(RFDC)
TP(RFAC)
BD board
oscilloscope
TP(DVC)
Note:
Clear RF signal waveform means that the shape “ 
 ” can be clearly
distinguished at the center of the waveform.
E-F BALANCE (1  TRACK  JUMP)  ADJUSTMENT
Procedure :
1. Connect an oscilloscope to TP (TEO) and TP (DVC).
2. Turn the power ON.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the hH button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
6. Adjust RV101 on the BD board so that the center of waveform
becomes the same voltage of DVC. (i.e.  A=0V)
Connecting and Adjustment Location: BD board
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 0.65 
±
0.15Vp-p (RFDC)
1.1 
±
0.4Vp-p (RFAC)
TP(TEO)
TP(DVC)
BD board
oscilloscope
level=1.0 
±
0.5Vp-p
symmetry
A (DC voltage)
center of
waveform
B
DVC
1 track jump waveform
22
HCD-GX8000/RG77
Connecting and Adjustment Location:
– BD BOARD (Component Side) –
TP
(DVC)
TP
(FEO)
TP
(FEI)
TP
(RFDC)
TP
(RFAC)
TP
(TEO)
– BD BOARD (Conductor Side) –
RV101
E-F BALANCE
(1 TRACK JUMP)
ADJUSTMENT
HCD-GX8000/RG77
23
23
SQSO
SQCK
A/D
CONVERTER
CH1OUTR
CH1OUTF
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40
39
64 15
28
29
30
31
32
33
24
25
23
6
5
3
2
17
18
15
16
CD A+5V
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
DIGITAL
PLL
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
DATA
XLAT
CLOK
14
5
6
MDP
26
7
8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4SIN
CH3RIN
CH3OUTF
CH3OUTR
CH2RIN
CH2FIN
CH1RIN
CH1FIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
EMPH
WFCK
GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
SENS
20
36
37
35
34 19
SCOR
SQ-DATA-IN
SQ-CLK
XLT
CD-CLK
CD-DATA
SENS
SCOR
1 2
32 33
SCLK
COUT
9 21
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
CH4OUTF
CH4OUTR
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
CH2OUTR
CH2OUTF
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
BLOCK
(A-MAX. 3)
SW
PD
11
12
14
13
54
56 53
55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR
BUFFER
CLOCK
GENERATOR
TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
43
XRST
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
DOUT
70
77
LOUT1
LOUT2
R-CH
72
75
71
76
A
(Page 25)
EQ
IN
15
3
4
EQ
AC
SUM
17
FEI
RF DC
AMP
28
RFDCO
29
RFDCI
19
TE BAL
COIL
DRIVE
COIL
DRIVE
24
26
28
BU-PWM3
BU-PWM2
BU-PWM1
PWM1
PWM3
PWM2
PWM3
PWM2
PWM1
40 LD-ON
48
49
BU UP/DOWN-SW
TBL-SENS
50
CD-MUTE
DISC TRAY
STATUS SENSOR
IC711
LASER DIODE
ON SWITCH
Q202 – 205
OPEN-SW 46
CLOSE-SW 47
OPEN
CLOSE
S701
DISC TRAY OPEN/CLOSE
DETECT
S711
OPTICAL PICK-UP
UP/DOWN DETECT
LOAD-OUT 45
LOAD-IN 44
9
7
RIN
FIN
MOTOR
DRIVE
4
2
OUT1
OUT2
TURN MOTOR
DRIVER
IC701
M721
(TURN)
M
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (1/4)
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
• R-ch is omitted due to same as L-ch.
OPTICAL
TRANSCEIVER
IC201
CD DIGITAL OUT
OPTICAL
CD
L-CH
RFAC
VCA
(LIMIT)
When the optical
pick-up is inner 
position
ON :
E-F BALANCE
(1 TRACK JUMP)
RV101
MUTING
Q201
MUTING CONTROL
SWITCH
Q206, 207
R-CH
67
66
XTAO
XTAI
X101
16.9344MHz
SECTION  7
DIAGRAMS
7-1.
BLOCK  DIAGRAM  – CD SERVO Section –
HCD-GX8000/RG77
24
24
FM ANT
ANT GND
AM ANT
ANT GND
ST-DIN
ST-CLK
ST-CE
ST-MUTE
TUNED
STEREO
L-CH
R-CH
ST-DOUT
TUNER UNIT
FM 75
AM
R-CH
25
ST-DIN
23
ST-DOUT
27
ST-CLK
22
ST-CE
21
ST-MUTE
DI
DO
CLK
CE
MUTING
3
TUNED
2
STEREO
TUNED
STEREO
R-CH
L-CH
R-CH
L-CH
R-CH
R-CH
HP901
(PB)
HRPE901
(REC/PB/ERASE)
1
3
2
4
R-CH
R-CH
REC/PB SWITCHING
IC302
R-CH
BIAS OSC
T301
BIAS
TRAP
REC BIAS
SWITCH
Q301, 307, 310
TC +10V
BIAS OSC
Q302, 303
TRIGGER
PLUNGER DRIVE
(DECK B)
Q391, 392
PM902
TRIGGER PLUNGER
(DECK B)
51
A-TRIG
TRIGGER
PLUNGER DRIVE
(DECK A)
Q393, 394
PM901
TRIGGER PLUNGER
(DECK A)
52
B-TRIG
90
B-SHUT
89
A-SHUT
34
32
BIN1
AIN1
15 13 12
14
28
27
EQOUT1
26
PB-OUT1
TAI1
MUTE
DECK A/B SELECT SWITCH,
PB EQ AMP
IC301 (1/2)
R-CH
23
REC-
OUT1
REC-IN1
ALC1
REC EQ AMP, ALC
IC301 (2/2)
21
R-CH
R-CH
68
ALC
C
(Page 25)
TAPE
L-CH
B
(Page 25)
TUNER
L-CH
D
(Page 25)
REC
L-CH
55 CAPM-CNT1
54 CAPM-H/L
65 BIAS
CAPSTAN
MOTOR DRIVE
Q396, 397
M
M
M901
(CAPSTAN)
57
B-PLAY
56
A-PLAY
11
ALC ON/OFF
S1002
(DECK B PLAY)
S1001
(DECK A PLAY)
70
A-HALF
S1003
(DECK A HALF)
91
B-HALF
S1006
(DECK B HALF)
S1009
(DECK B REC)
S1005
(DECK A REC)
D +3.3V
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (2/4)
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
: TUNER (FM/AM)
: TAPE PLAY (DECK A)
: REC
: TAPE PLAY (DECK B)
ROTATION
DETECT SENSOR
(DECK A)
IC1001
ROTATION
DETECT SENSOR
(DECK B)
IC1002
DO
CE
MUTING
TUNED
STEREO
DI
CLK
REC BIAS (L)
(DECK B)
RV304
REC BIAS (R)
(DECK B)
RV354
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
Q395
TAPE SPEED
(HIGH)
RV1001
TAPE SPEED
(NORMAL)
RV1002
A/B
NORMAL/HIGH SPEED
MUTE ON/OFF
REC MUTE ON/OFF
A/B
NOR/HIGH
REC MUTE
58
53
61 67 66
A/B
NOR/HIGH
REC-MUTE
PB-A/B
EQ-H/N
TC-MUTE
AMS-IN
REC MUTE
EQ
ALC
REC LEVEL (L)
(DECK B)
RV301
69
TC-RELAY
+
MUTING
Q306
MUTING CONTROL
SWITCH
Q389
BUFFER
Q390, 398, 399
LOW-PASS
FILTER
IC303
24
ANTENNA
REC/PB
SWITCHING
Q304, 305
D +3.3V
D +3.3V
7-2.
BLOCK  DIAGRAM  – TUNER/TAPE DECK Section –
HCD-GX8000/RG77
25
25
7-3.
BLOCK  DIAGRAM  – MAIN Section –
STK-MUTE
PROTECTOR
HP MUTE
LINE-MUTE
GEQ DATA
GEQ CLK
FRONT-RELAY
LINK-RELAY
86
HP-DETECT
79
78
87
88
83
80
81 82
M891
(FAN)
+

+
+

+
FRONT SPEAKER
IMPEDANCE
USE 6–16
L
R
SURROUND
SPEAKER
IMPEDANCE
USE 24
L
R
PHONES
J631
RY501
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (3/4)
• R-ch is omitted due to same as L-ch.
CD L-CH
A
(Page 23)
TAPE L-CH
C
(Page 24)
TUNER L-CH
B
(Page 24)
T501
D507
D511
FAN MOTOR
DRIVE
Q891, 892
FAN MOTOR
ON SWITCH
Q831
OVER LOAD
DETECT SWITCH
Q510, 511
PROTECT SWITCH
Q502
OVER LOAD
DETECT SWITCH
Q509
OVER LOAD
DETECT
Q501, 551
DC DETECT
SWITCH
Q507, 508
M
HEADPHONE MUTING
Q812, 862
MUTING CONTROL
SWITCH
Q861
RY502
+
+
+
TH701
+
TEMPERATURE
DETECT SWITCH
Q505, 506
D502
MUTING
Q103
MUTING CONTROL
SWITCH
Q504, 505
STANDBY
SWITCH
Q503, 504, 581
R-CH
D841
R-CH
R-CH
18
15
17
16
OUT1
VOLIN1
14
22
21
TOUT1
VOLUME
CONTROL
SOUND
CONTROL
CIRCUIT
INPUT
SELECT
SWITCH
+
R-CH
8
+
R-CH
R-CH
R-CH
INPUT SELECT SWITCH,
TONE CONTROL,
ELECTRICAL VOLUME
IC102
IND1
INB1
INA1
INC1
6
4
3
2
INEX1
SWOUT
BB B1
BB A1
RECB1
DATA
CLOCK
7
5
24
SAOUT
MIC
19
+
CPU
INTERFACE
R-CH
J750
L
R
MD/VIDEO
(AUDIO) IN
R-CH
J601
J401
L
R
GAME
INPUT
REC L-CH
D
(Page 24)
SPEANA
(Page 26)
MIC
AUDIO
VIDEO OUT
VIDEO
J721
MIC AMP
IC722 (1/2)
FEED BACK
SWITCH
Q101
• SIGNAL PATH
: TUNER (FM/AM)
: CD PLAY
: TAPE PLAY
: MD/VIDEO (AUDIO) IN
: GAME INPUT (AUDIO)
: GAME INPUT (VIDEO)
: REC
: MIC INPUT
SURROUND
SPEAKER PROTECT
RELAY DRIVE
Q513
FRONT SPEAKER
PROTECT
RELAY DRIVE
Q512
–2
–1
POWER AMP
IC501
RV722
MIC LEVEL
MIC
CONTROL
Q721
A +10V
MIC AMP
IC722 (2/2)
E
HCD-GX8000/RG77
26
26
FL601
FLUORESCENT
INDICATOR TUBE
 10, 12 
 22,
24 
 41, 43, 44
P1 
 P41
1G 
 15G
100 
 86
17 
 12
67 
 72
64 
 66
F01 
 F06
BPF0 
 BPF5
4 LINE IN
11
L+R
BAND-PASS
FILTER
IC602
73 ALL-BAND
6 REC IN
80 VOLUME-A
79 VOLUME-B
ROTARY
ENCODER
S748
VOLUME
X
E
SPEANA
X601
4MHz
83 X1
82 X0
52 
 59, 74
LED-TAPE,
LED-TUNER,
LED-MD-VIDEO,
LED-CD,
LED-GAME,
LED-DISC1,
LED-DISC2,
LED-DISC3,
LED-REC
LED DRIVE
Q601 – 605,
Q791 – 793, 795
D604 – 608,
D791 – 793, 795
D794
KEY0 
 KEY2
S751, 752, 754 – 762,
S765 – 780, 782 – 792
60
I2C-DATA
61
I2C-CLOCK
77
RESET
30 IIC-DATA
29 IIC-CLK
41 GC-RESET
74 POWER-KEY
73 DISPLAY-KEY
S749
S750
DISPLAY
75 STBY-LED
4 SIRCS
X502
16MHz
15 X-IN
13 X-OUT
X501
32.768kHz
10 XC-IN
11 XC-OUT
38
CD-POWER
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC501 (4/4)
84
STBY-RELAY
12
RESET
20
AC-CUT
B+ SWITCH
Q911, 912
RECT
D906 – 909
RECT
D914 – 917
CD +3.3V
+3.3V
REGULATOR
Q102
+5V
REGULATOR
IC911
M +9V
M +7V
A +10V
TC +10V
D920 – 922
D502
D504
D501
D503
+4V
REGULATOR
IC951
+4V
REGULATOR
IC971
D +4V
+9V
REGULATOR
IC961
+10V
REGULATOR
IC101
CD D+5V
CD A+5V
RESET SIGNAL
GENERATOR
IC601
D505
RECT
D918, 919, 923, 924
RECT
D972 – 975
LED DRIVE
Q794
T972
SUB POWER
TRANSFORMER
RECT
D541
RECT
D543
+VL
–VL
+VH
–VH
– 33V
REGULATOR
Q941
POWER ON/OFF
RELAY DRIVE
Q971
– VG
RECT
D977
VF1
VF2
RY971
(E, Singapore)
EXCEPT
E, Singapore
AC IN
T910
MAIN POWER
TRANSFORMER
RESET
SWITCH
Q601
REMOTE CONTROL
RECEIVER
IC603
TO FLUORESCENT
INDICATOR TUBE
FL601
D +3.3V
EVER +4V
VOLTAGE
SELECTOR
S901
FLUORESCENT
INDICATOR TUBE DRIVER,
KEY CONTROL
IC601
(Page 25)
7-4.
BLOCK  DIAGRAM  – DISPLAY/KEY CONTROL/POWER SUPPLY Section –
HCD-GX8000/RG77
27
27
7-5.
NOTE  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS
Note on Printed Wiring Board:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
2
: nonflammable resistor.
5
: fusible resistor.
C
: panel designation.
A
: B+ Line.
B
: B– Line.
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM/AM)
E
: TAPE PLAY (DECK A)
d
: TAPE PLAY (DECK B)
G
: REC
J
: CD PLAY (ANALOG)
c
: CD PLAY (DIGITAL OUT)
q
: MD/VIDEO (AUDIO) IN
j
: GAME IN (AUDIO)
k
: GAME IN (VIDEO)
N
: MIC INPUT
• Abbreviation
AR
: Argentina model
MX
: Mexican model
SP
: Singapore model
• Circuit Boards Location
Note: The components identified by mark 
0
 or dotted line
with mark 
0
 are critical for safety.
Replace only with part number specified.
MOTOR board
SENSOR (CD) board
DRIVER board
BD board
SW board
HEAD (A) board
HEAD (B) board
MAIN TRANS board
SENSOR board
TUNER PACK
MAIN board
POWER board
PANEL board
CD SWITCH board
CD OPEN board
PAD SWITCH board
GAME IN board
VOL board
SUB-TRANS board
HCD-GX8000/RG77
28
28
IC102
IC101
IC103
A
B
C
D
1
2
3
4
M102
(SLED)
2
8
7
1
M101
(SPINDLE)
OPTICAL PICK-UP
BLOCK
(A-MAX.3)
TP
(DVC)
TP
(RFAC)
TP
(FEI)
TP
(FEO)
TP
(TEO)
TP
(RFDC)
Approx.
0.4 Vp-p
Approx.
0.3 Vp-p
7-6.
PRINTED  WIRING  BOARD  – BD Board –
 See page 27 for Circuit Boards Location.
qg
IC501 
qd
 (X-OUT)
qf
IC501 
qa
 (XC-OUT)
2.4 Vp-p
30.5 
µ
s
1.9 Vp-p
62.5 ns
• Waveforms
– BD Board –
1.1 
±
 0.4 Vp-p
1
IC103 
qg
 (RFAC) (CD Play Mode)
2.5 Vp-p
7.5 
µ
s
2
IC101 
wh
 (MDP) (CD Play Mode)
3
IC101 
el
 (FE) (CD Play Mode)
4
IC101 
ra
 (TE) (CD Play Mode)
0.65 
±
 0.15 Vp-p
5
IC101 
t;
 (RFDC) (CD Play Mode)
5 Vp-p
59 ns
2.1 Vp-p
12.1 
µ
s
qa
Q302, Q303  (Base) (REC Mode)
10.8Vp-p
12.1 
µ
s
qs
Q302, Q303  (Collector) (REC Mode)
6
IC101 
yj
 (XTAO)
– MAIN Board –
0.4 Vp-p
12.1 
µ
s
qd
Q302, Q303  (Emitter) (REC Mode)
2.8 Vp-p
250 ns
wa
IC601 
is
 (X0)
– PANEL Board –
(Page 33)
• Semiconductor
Location
Ref. No.
Location
D101
B-4
IC101
C-3
IC102
B-2
IC103
D-2
Q101
C-1
Q102
B-4
HCD-GX8000/RG77
29
29
A
MAIN
BOARD (1/4)
CN201
1
2
3
4
5
6
RV101
E-F BALANCE
(1 TRACK JUMP)
TP
(RFDC)
TP2
(TEO)
TP
(DVC)
680
220k
33k
TP
(FEI)
TP
(RFAC)
Q101
2SB710A-RT1
AUTOMATIC
POWER CONTROL
RF AMP,
FOCUS/TRACKING
ERROR AMP
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
TP
(FEO)
DIGITAL SERVO PROCESSOR
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER,
D/A CONVERTER
Q102
2SD1664-T100-QR
+3.3V REGULATOR
DSP+5V (SW)
D-OUT
DSP-GND
L-CH
RF-GND
R-CH
RF+5V (SW)
X-RST
CD-DATA
CD-CLK
LD-ON
SQ-DATA
SQ-CLK
M-GND
M+7V (UNSW)
X-LAT
7-7.
SCHEMATIC  DIAGRAM  – BD Board –
 See page 28 for Waveforms.
 See page 48 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
The components identified by mark 
0
 or dotted
line with mark 
0
 are critical for safety.
Replace only with part number specified.
(Page
34)
HCD-GX8000/RG77
30
30
MAIN BOARD (1/4)
CN202
B
0.2
3.3
IC711
SG-264
DISC TRAY
STATUS SENSOR
S711
OPTICAL PICK-UP
UP/DOWN DETECT
C712
0.1
D+3.3V
D. GND
D+3.3V
D. GND
TURN
MOTOR
DRIVER
D+3.3V
D. GND
(LOAD IN)
(LOAD OUT)
S701
DISC TRAY
OPEN/CLOSE DETECT
OPEN
CLOSE
14
(14)
14
(14)
14
(14)
C712
1
4
OPTICAL PICK-UP
UP/DOWN DETECT
CN202
B
IC711
IC701
S701
DISC TRAY
OPEN/CLOSE DETECT
M721
(TURN)
7-8.
PRINTED  WIRING  BOARDS  – DRIVER/MOTOR/SENSOR (CD) Boards –
 See page 27 for Circuit Boards Location.
7-9.
SCHEMATIC  DIAGRAM  – DRIVER/MOTOR/SENSOR (CD) Boards –
 See page 48 for IC Block Diagram.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : CD PLAY
(Page 33)
(Page 34)

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