Grundig CCF 23, Service Manual, Page: 22 / 28

Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs CCF 23 Schaltpläne und Druckplattenabbildungen / Circuit Diagrams and Layout of PCBs CCF 23
3 - 11 GRUNDIG Service 3 - 12 GRUNDIG Service
AUDIO L = RECORD LEFT CHANNEL (AF)
AUDIO R = RECORD RIGHT CHANNEL (AF)
AVDD = VOLTAGE 5V
BIAS = BIAS GENERATOR „ON“
C/B/OFF = DOLBY SWITCH-OVER
CLK = DATA LINE
CR = CR SWITCH-OVER
FE = FE SWITCH-OVER
FIL1 = DISPLAY VOLTAGE
FIL2 = DISPLAY VOLTAGE
HS = HIGH SPEED
KBRD1 = KEYBOARD LEFT
KBRD2 = KEYBOARD RIGHT
LINEOUT-L = OUTPUT LEFT CHANNEL
LINEOUT-R = OUTPUT RIGHT CHANNEL
LMUTE = PLAYBACK MUTE
NS = NORMAL SPEED
PD = VOLTAGE 5V
PLBK = PLAYBACK
R/P = RECORD/PLAYBACK SWITCH-OVER
REC-L = RECORD LEFT CHANNEL
REC-R = RECORD RIGHT CHANNEL
RECORD L = RECORD LEFT CHANNEL (AF + BIAS)
RECORD R = RECORD RIGHT CHANNEL (AF + BIAS)
RMUTE = RECORD MUTE
SIN = DATA LINE
SOUT = DATA LINE
SRDY = DATA LINE
VEE = VOLTAGE SUPPLY – 24V
ABBREVIATIONS OF THE LINES IN THE CIECUIT
DIAGRAMS
GLEICHSPANNUNGEN BEI WIEDERGABE GEGEN MASSE GEMESSEN.
BEI DEN IN DEN SCHALTPLÄNEN ANGEGEBENEN MESSWERTEN HANDELT ES
SICH UM NÄHERUNGSWERTE! DC-VOLTAGES MEASURED AGAINST MINUS TERMINAL (GND) ON PLAYBACK.
THE MEASURED VALUES GIVEN IN THE CIRCUIT DIAGRAMS ARE APPROXIMATES!
GEMESSEN BEI AUFNAHME OHNE SIGNAL MIT CR-CASSETTE
MEASURED DURING RECORDING OF A CR CASSETTE WITHOUT SIGNAL
(...V) =
Audio Board
(4.4V)
(0.7V)
(2.2V)
(8.7V)
(8.7V)
(1
1V)
(8.7V)
(9.3V)
(12V)
(11V)
(9.3V)
(2.2V)
(9.3V) (9.2V) (9.2V)
(7.9V)
(0.7V)
(1.2V)
(1.7V)
(4.4V)
(2.2V) (9.2V) (9.2V)
(7.9V)
(0.7V) (1.2V)
(4.4V)
9V
8V
8V
9V
8V
8V
-0.15V
-0.2V
-0.2V
-0.15V
L1
P
AGE 3-5
P
AGE 3-4
BIAS
BIAS
C165
C166
TO
PAGE
3-8
TO R/P HEAD
PAGE 3-7
TO R/P HEAD
PAGE 3-7
FROM R102
PAGE 3-10
FROM R101
PAGE 3-10
IC105
µ
PC1297CA (HX-PRO)
µ
PC 1297 CA
1 2 3 4 5 6 7 8 9
18 17 16 15 14 13 12 11 10
ABSO
DET
PEAK
DET
ABSO
DET
PEAK
DET
VCA
VCA
PRE
DRIVER
V
CC
V
R2
V
IN(R)2
PH
2
C
IN2
C
OUT2
V
OUT21
V
OUT22
V
IN(0)
V
ST
V
R1
V
IN(R)1
PH
1
C
IN1
C
OUT1
V
OUT11
V
OUT12
GND
VOLTAGE
REGULATOR
THERMAL
PROTECTION
COMP
COMP