Inhaltsverzeichnis
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Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
Audio Board
(0.7V)
(11V)
(12V)
(9.3V)
(8.7V)
GEMESSEN BEI AUFNAHME OHNE SIGNAL MIT CR-CASSETTE
(...V) =
MEASURED DURING RECORDING OF A CR CASSETTE WITHOUT SIGNAL
BIAS
(2.2V)
(4.4V)
(1.2V)
(0.7V)
TO R/P HEAD
PAGE 3-7
BIAS
(4.4V)
(2.2V)
(4.4V)
(1.2V)
(0.7V)
(2.2V)
TO R/P HEAD
PAGE 3-7
8V
9V
8V
9V
GLEICHSPANNUNGEN BEI WIEDERGABE GEGEN MASSE GEMESSEN.
BEI DEN IN DEN SCHALTPLÄNEN ANGEGEBENEN MESSWERTEN HANDELT ES
SICH UM NÄHERUNGSWERTE!
3 - 11
(8.7V)
(8.7V)
(1.7V)
(9.2V)
(9.2V)
(9.3V)
(7.9V)
FROM R102
PAGE 3-10
(9.2V)
(9.2V)
(7.9V)
FROM R101
PAGE 3-10
8V
8V
C165
TO
PAGE
3-8
C166
DC-VOLTAGES MEASURED AGAINST MINUS TERMINAL (GND) ON PLAYBACK.
THE MEASURED VALUES GIVEN IN THE CIRCUIT DIAGRAMS ARE APPROXIMATES!
GRUNDIG Service
CCF 23
Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs
L1
IC105 µPC1297CA (HX-PRO)
V
V
V
PH
C
C
V
CC
R2
IN(R)2
2
IN2
OUT2
OUT21
18
17
16
15
14
13
12
ABSO
PEAK
COMP
DET
DET
THERMAL
VOLTAGE
µPC 1297 CA
REGULATOR
PROTECTION
ABSO
PEAK
COMP
DET
DET
1
2
3
4
5
6
V
V
V
PH
C
C
V
ST
R1
IN(R)1
1
IN1
OUT1
OUT11
-0.15V
-0.2V
-0.15V
-0.2V
3 - 12
ABBREVIATIONS OF THE LINES IN THE CIECUIT
DIAGRAMS
AUDIO L
=
RECORD LEFT CHANNEL (AF)
AUDIO R
=
RECORD RIGHT CHANNEL (AF)
AVDD
=
VOLTAGE SUPPLY + 5V
BIAS
=
BIAS GENERATOR „ON"
C/B/OFF
=
DOLBY SWITCH-OVER
V
V
CLK
=
DATA LINE
OUT22
IN(0)
CR
=
CR SWITCH-OVER
11
10
FE
=
FE SWITCH-OVER
FIL1
=
DISPLAY VOLTAGE
FIL2
=
DISPLAY VOLTAGE
HS
=
HIGH SPEED
VCA
KBRD1
=
KEYBOARD LEFT
KBRD2
=
KEYBOARD RIGHT
LINEOUT-L
=
OUTPUT LEFT CHANNEL
LINEOUT-R
=
OUTPUT RIGHT CHANNEL
PRE
DRIVER
LMUTE
=
PLAYBACK MUTE
NS
=
NORMAL SPEED
PD
=
VOLTAGE SUPPLY + 5V
PLBK
=
PLAYBACK
VCA
R/P
=
RECORD/PLAYBACK SWITCH-OVER
REC-L
=
RECORD LEFT CHANNEL
REC-R
=
RECORD RIGHT CHANNEL
RECORD L
=
RECORD LEFT CHANNEL (AF + BIAS)
7
8
9
RECORD R
=
RECORD RIGHT CHANNEL (AF + BIAS)
RMUTE
=
RECORD MUTE
V
GND
OUT12
SIN
=
DATA LINE
SOUT
=
DATA LINE
SRDY
=
DATA LINE
VEE
=
VOLTAGE SUPPLY – 24V
CCF 23
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