Philips CD931 - Page 10

SERVICING HINTS
43
in the set chip components have been applied. For disassembly and assembly of chip components see the figure
below.
GENERAL
SERVICE PACKAGE
SERVICE TOOLS
Audio signal disc
Disc without errors (test disc 5) +
disc with DO errors,
black spots and fingerprints (test
dise 5A
Disc (65 min 1kHz)without pause
Max. diameter disc (58.0 mm)
Torx screwdrivers
Set (straight)
Set (square)
13th order filter
Service cable (4p)
Service fiexfoil (14p)
Service connector (14p)
Green LED CQY G11
Infra red remote control e.g.
DISMOUNTING
VACUUM PISTON
SOLDERING 6822 395 10082
IRON
eI
#.9. WELLER
SOLDER TIP PT-H7
SOLDERING
IRON
SOLDER WICK
4822 321 40042
€.9. A PAIR OF TWEEZERS
HEATING +
x
SOLDERING IRON
SOLDER WICK CLEANING
PRECAUTIONS
SOLDERING
IRON
/PPER TRACK
SOLOERING
4822 397 30184
4822 397 30096
4822 397 30155
4822 397 60141
4822 395 50145
4822 395 50132
4822 395 30204
4822 321 21284
4822 322 40066
4822 267 50676
5322 130 32182
4822 218 10324
aso CZ
Se
8
HEATING
Ca
MOUNTING
0.9. A PAIR OF TWEEZERS
4
SOLDER
205-08 mm
SOLDERING \. pressuRE
4RON +
SOLDERING TIME SOLDER
<3 seciside 205-08 mm
pressure J SOLDERING
+ 1RON
27 Owe
PCS 60 039
AGC - Automatic Gain Control
AM ~ Additional mute
ATSB - Attenuation of Audio level in Search
position
ATT _ = Attenuation
BO-B3 - Control bits for radial circuit
BEQ - Equalizer reference current input
BCKI — Input data bit clock
BCKO - Output data bit clock
BGC - DC and LF gain contro! reference input
BSW ~ Bandwidth switch turntable motor circuit
CD ROM ~ Digital Data information in disc signa!
switch
CEFM - Clock Eight-to-Fourteen Modulator
CKO - Oscillator output clock
CKSL - Clock frequency
CLAB ~ Clock signal Detector-A to Filter-B
CLBD - Clock signal Filter-B to DAC
Cli - PS seriat bit clock input
CORR - 1/2 bit DAC
Cosci - Capacitor wobble oscillator
Cosc2 - Capacitor wobble oscillator
CREF ~ Reference current
CRI ~ Counter Reset Inhibit
DAAB ~ Data signal Decoder-A to Filter-B
DABD ~ Data signal Filter-B to DAC
DAI ~ PS serial data input
DAO - PS serial data output
DEC. ~ Decoupling input internal bypass
DEEM - Deemphasis
DET ~ HF detector voltage input
DIN ~ Input data
Diva ~ Divide by 4 input
DMUTE - Digital mute
DOBM - Digital out signal
DOEN ~ Digital out enable
DO0DS ~ Drop out detector suppression
D1-4 ~ Photodiode currents
DOL - Left channel data output
DOR - Right channel data output
EFAB ~ Error flag Decoder~A to Filter-B
FBL+ - - Feedback for left positive (negative) swit
ched capacitor integrator
FBR+ - - Feedback for right positive (negative) swit
ched capacitor integrator
FE - Focus error signat
FE lag ~ Focus error signal for LAG network
HF ~ HF output for DEMOD
HFD - HF detector output for DEMOD
HF-in - HF current input to HF amplifier
HF-out - HF amplifier and equalizer voltage output
IDF1-3 - Input data format
INTL+ - ~ Output from left positive (negative)
switched capacitor integrator
INTR+ - ~ Output from right positive (negative) swit
ched capacitor integrator
LM - Laser monitor diode input
LO - Laser amplifier current output
LARC! - Input data word clock
MC - Motor contro! signal
MCES - Motor speed contro!
MCK ~ Mode set bit clock
MOT - Mode set seria! data input
MLE - Mode set latch enable
MUSB ~ Soft mute signa!
MUTE ~ Mute signal
PCS 60 040
OALO ~ Operational ampl. teft output
OARO - Operational amp. right output
Offset IN- . - Offset contro! input
Offset OUT - Offset contro! output
PD/OC ~ Phase detector - oscillator control
PLLH - PLL on hold reset
QcL - Q-channel clock signal
OQDA - Q-shanne! data signal
QRA ~ Q-channel request aknowiedge
RADout - Output of RE2-RE1 input
RE ~ Radial errer signal (Amplified RE2-
RE‘ currents)
Rose - Resistor wobble oscillator
Rwob ~ Wobble generator input
RE1 ~ Radial error signal 1
RE2 - Radial error signal 2
RE dig ~ Radial error digital
RE lag ~ Radial error signa! for LAG network
RST ~ Device reset
SBD ~ Single Bit Deviation correction
Sc ~ Starting up capacitor input
SCAB ~ Subcode clock Decoder-A to Filter-B
SCKI - Bit clock input for serial input interface
SDAB ~ Subcode data Decoder-A to Filter-B
SDi1-2 - Serial data input .
SIN_ ~ Tray switch
Si/RD + On/off control for laser supply and focus
circuit. Ready signal. Starting up procedure
succesfull
SWAB/SSM_ - Subcode word/start-stop motor signal
TL ~ Track loss output signal
TRMOT - Tray motor drive
TTM+ - Control voltage for turntable motor
TTM- - Control voltage for turntable motor
TTMO - Motor offset and bandwidth switch
VDACL-R_ = - Reference voltage supply left(right) channel
DAC
Vext+ - Supply connection
Vext- - Supply connection
VRCL-R - High impedance voitage refence for left
(right) channel inputs
VROL-R - Left (right) channel voltage reference
output
WCKO - Output word clock
WSAB - Word select Decoder-~A to Filter-B
WSBD - Word select Filter-B to DAC
WSI - S word select input
Wwso - FS word select output
XIN - Oscillator signal input
XOUT - Oscillator output
XSEL ~ Crystal frequency select
xsYS - Oscillator signal
XTI - Crystal oscillator input
XTO ~ Crystal oscillator output