Hitachi C2576 TN Schematic
1HITACHI C2576 TN
General Information
A5 Chassis
Also Covers
C2577TN, C2976TN, C2977TN, C28300.
Specifications
TV Standard ...................................................................................................... 625 lines,
.............................................................................................................. STANDARD I (UK)
............................................................................................................ B/G/H, /L’, (Export)
Channel coverage ........................................................................... UHF Channels (UK)
......................................................................................... UHF/VHF Hyper band (Export)
Aerial input impedance........................................................................................ 75 ohm
.........................................................................................................................unbalanced
Programme Selectors ..................... Channel UP/DOWN buttons with 60 programme
.............................................. remote control CH direct input. Frequency direct input
Power Consumption
C2576/77/75 ............................................................................................................. 139 W
C2976/77/75 ............................................................................................................. 141 W
C28300TN ................................................................................................................ 143 W
Picture tubes
C2576/77/75 ..................................................................................................... 59 cm type
C2976/77/75 ..................................................................................................... 68 cm type
C28300TN ........................................................................................................ 66 cm type
Mains Voltage........................................................................................ 220V/240V 50 Hz
Fuse ................................................................................................................. T4.0A Type
Focusing...................................................................................................... Electro static
Recommended Safety Parts
Item Part No. Description (Models)
X240533 Back Cover 25"
X240555 Back Cover 29"
C101 J0800041R
C9000 J0262774N
C9001 J0262774N
C901 J0262774N
C9011 JAJ00273R
C9012 JAJ00273R
C902 J0262774N
C903 C648751
C9105 C135753
C998 0232753
C999 0130753
E801 E822925 29"
E801 J2698351 25", 16:9
E900 E846662 CL, CP
E900 E846815 C
F&S LEAD J2956783
F901A E882376
IC901 J2917782
IC902 J2917782
L9000 J2124531
L901 L380105
L902 L380105
L910 (Deg Coil) J2274361 25"
L910 (Deg Coil) J2274362 29", 16:9
OP9000 J2917782
R4505 R407551
R4506 R407551
R4555 R407551
R4556 R407551
R4706 R407551
R4707 R407551
R4811 R407551
R9019 R353714 76’s, 77’s
R9019 R658714 16:9
R9100 R812551
R917 R353714 25", 29"
R926 R162714 16:9
R942 R812551
R999 R170727
RL2700 J2640572
RL2701 J2640572
RL900 J2640572
RL950 J2640572
SW901 J2633391
T701 J2436626 29"
T701 J2436771 25"
T701 J2436771 16:9
T9000 L380104
T901 L380103
V1 T159012 25"
V1 T166018 16:9
V1 T180002 29"
X240631 Back Cover 16:9
N937014 Chassis Frames 76’s, 77’s
N937015 Chassis Frames 75’s
N937018 Chassis Frames 16:9
Service Mode
A5 SERVICE MODE OPTIONS
The SERVICE MODE screen is entered by
pressing the ‘ESO’ button underneath the cover
on the handset. The T.V. must, however, be in
factory mode first. The T.V. can be switched into
factory mode by pressing both VOLUME +/buttons on the front of the set whilst it is
powering up.
SERVICE MODE
CODE V1. F E2 V1. F
AFC = 0
< GEOM Reg. 00 >
GEOM Value 00
GREY Reg. 00
GREY Value 00
A2 Level 00
A2 Stereo 00
BYTE 00000000
EXTERNAL 12C
VERSION INDICATION
1) The Version number of the programme code
in the EPROM is displayed after the word
“CODE”.
2) The Version number of the data in the
external EEPROM (E2) is displayed after the
word “E2”.
AFC INDICATION
The service engineer can set the AFC coil ([202)
without the use of a meter by ensuring that the
AFC digit is on the boundary between 2 and 3.
The range of the digit is between 0 and 4.
A2 ADJUSTMENT
1) The A2 input level can be adjusted to any
desired value between 0 and 15 by using the
cursor LEFT/RIGHT buttons on the handset.
The normal value is 0.
2) The A2 Stereo separation can be adjusted to
any desired value between 0 and 63 using the
cursor LEFT/RIGHT
buttons on the handset. The normal value is 0.
GEOMETRY ADJUSTMENT IN SERVICE
MODE
Geometry Geometry Adjustment
Register Number Setting
00 Horizontal Shift
01 EastAAlest Width
02 East/West ParabolafiNidth
03 East/West Corner/Parabola
04 EastANest Trapezium
05 Vertical Slope
06 Vertical Amplitude
07 5 Correction
08 Vertical Shift
GREY SCALE (WHITE BALANCE) ADJUSTMENT IN SERVICE MODE
Grey Scale Grey Scale Adjustment
Register Number Setting
00 RED Gain
01 GREEN Gain
02 BLUE Gain
03 RED Level
04 GREEN Level
05 BLUE Level
NOTE: These adjustments are for the current
selected white balance setting in the FEATURE
MENU. The user will have to swap between the
FEATURE MENU and SERVICE MODE to
adjust all 3 white balance settings (COLD,
NORM and WARM).
SERVICE BYTE DESCRIPTION
Factory Auto I Dolby TOP Single NOT Comb
Mode Tuning Standard Disable Text Standard USED Filter
ON ON VHF Enable Enable Enable
OFF
NOTE 1: The user can NOT alter the FACTORY
MODE or AUTO TUNE flags using the left/right
cursor buttons on the handset when in SERVICE MODE.
Main A5 Menu Tree
A5 Sub-Menu Tree
Service Mode Menu Tree
Fig. 1
Fig. 2 Fig. 3
Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont’d / Text Diagram / Voltage Tables / Voltage Tables Cont’d / 16:9 Deflection PCB
Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300)
Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)
HITACHI C2576 TN
2
Service Mode Cont’d
NOTE 2: The Factory Mode flag is set to ‘1’
when the T.V. is in Factory Mode. Factory mode
can be entered by pressing
both VOLUME +/- buttons on the front of the set
whilst it is being powered up.
NOTE 3: Auto Tune can be enabled so when the
TV. is switched on, it will start tuning in the TV.
(after the user has gone through the INSTALLATION MENU). This flag is enabled when the
user presses the STANDBY button or switches
the set off when the AUTOMATIC TUNING
screen is displayed.
NOTE 4: The I Standard VHF disable flag
informs the TV. whether or not it should begin
tuning at 441.10 MHz or 41.10 MHz. If this is set
then tuning will begin at 41.10 MHz. If this is ‘0’
and the single standard flag is ‘1’, then tuning
will begin at 441.10 MHz instead.
NOTE 5: For the A5 75 Model Range of T.V’s,
this flag will be set to indicate to the software
that no Dolby board is present.
NOTE 6: For sets that should have TOP TEXT
available, the TOP TEXT ENABLE flag should
be set to ‘1’.
NOTE 7: For a single standard chassis
(CP****TA, CP****TAN, and C****TN) this flag
should be set to ‘1’.
NOTE 8: For AS 25” and 28” models, the COMB
FILTER will not be fitted and as such this flag
should be cleared to ‘0’.
The GEOMETRY, GREY SCALE, A2, and
SERVICE BYTE values can be stored by
pressing the MENU button whilst the
SERVICE MODE screen is displayed. If the
user makes any mistake, the T.V. ( ) button
can be pressed to clear the screen. The
“ESC” button can then be pressed to reenter SERVICE MODE again.
A5 CHASSIS ALIGNMENT PROCEDURE
1. APPLICATIONS
2. P. W.B. ASSEMBLY ADJUSTMENT
2.1 FOR SIGNAL
2.1.1 PREPARATION ADJUSTMENT
2.1.2 AGC ADJUSTMENT
2.1.3 AFC ADJUSTMENT
2.2 FOR POWER AND DEFLECTION
2.2.1 +B VOLTAGE ADJUSTMENT
2.2.2 POWER GOOD LINE
2.2.3 AUDIO FEEDBACK TRIM
2.2.4 HIGH VOLTAGE LIMITER CIRCUIT CHECK
2.2.5 ANODE/FOCUS SHORT-CIRCUIT
TEST PROTECTION CIRCUIT
2.2.6 SUB PSU +9.5 V VOLTAGE SET
2.2.7 BASIC TEST SPECIFICATION
2.2.8 PRIMARY CURRENT LIMIT (C28300
ONLY)
3. FINAL ALIGNMENT
(BY SOFTWARE ADJUSTMENT)
3.1 PICTURE POSITION/SHAPE
3.1.1 HORTZONTAL
VERTICAL CENTRE
VERTICAL AMPLITUDE
3.1.2 TILT
PARABOLA
WIDTH
3.2 FOCUS ADJUSTMENT
3.3 SCREEN CONTROL/CUT OFF ADJUSTMENT
3.4 WHITE BALANCE ADJUSTMENT
4. PIN P ADJUSTMENT
5. ADJUSTMENT POINTS
6. SERVICE BYTE ASSIGNMENT INFORMATION
1. APPLICATIONS
THIS SPEC. SHOULD BE APPLED TO C2576/
77TN AND C2876/77TN (28300)
2. RW.B ASSEMBLY ADJUSTMENT
2.1 FOR SIGNAL
2.1.1 PREPARATION ADJUSTMENT
1) +B adj. VR950 .... Centre
2) Screen VR (FBT) .... Counter-clockwise fully
3) Turn on set. Adjust +B to approximately
150V. (Pre adjustment only - full adjustment in
section 2.2.1)
2.1.2 AGC ALIGNMENT
1) With the signal received, apply heat run for
more than two minutes to avoid the influence
of circuit temperature drift.
2) Connect a voltmeter of at least 100K internal
resistance to the A.G.C. terminal of the tuner.
3) Receive the channel below.
4) Adjust A.G.C. potentiometer VR201 until the
following voltage is obtained.
2.1.3 AFC ALIGNMENT
L202 ALIGNMENT
1) apply relevant RF signal. Circle Pattern
2) on dual/multistandard receivers select BG
standard.
3) Enter frequency on CTV controls to ensure
AFC loop is off.
4) Connect oscilloscope and voltmeter to pin 23
IC201 (TDA9815) or pin 13 (TDA9800).
5) Adjust L202 until fast rate of change is seen
on the oscilloscope.
6) Adjust L202 so that the voltmeter reads 2.5V
0.2V.
VR202 Alignment (CL**76/77TAN only)
1) Apply L standard RF signal.
2) Select L standard on CTV controls (system L
VHF band 1).
3) Enter frequency on CTV controls.
4) Connect oscilloscope and voltmeter to pin 23
IC201.
5) Adjust VR202 until a fast rate of change is
seen on the oscilloscope.
6) Adjust VR202 so that the voltmeter reads
2.5V ± 0.2V.
2.2 POWER AND DEFLECTION ADJUSTMENT
2.2.1 +B VOLTAGE ADJUSTMENT
1) AC input voltage = 230V + SV/5Hz.
2) Turn +B voltage VR (VR950) to mid-point (if
pre-adjustment not done).
3) Receive Philips circuit pattern. Switch on
chassis and set the brightness and contrast to
maximum.
4) After applying heat run for 30 sec. or more,
turn VR950 gradually and adjust +B (re-check
after 2 minutes heat run).
Measuring point: +B voltage C955 + side
gnd C955 - side
5) Set the value of +B voltage to the value
shown in the following table.
Model +B Voltage (V)
C2577 150 ± 0.2V
C2576
C2877 150 ± 0.2V
C2876
C28300TN
6) Short circuit test (all rails). PSU should go
into standby/reset/lockup. (Supply may have
to be removed to restart)
7) Standby check. +B should go to 120V < +B
>140V. ±8, +5, +12V should be 0V.
2.2.2 POWER GOOD LINE
1) Set picture to same conditions as above.
2) Measure pin 1 PL9S1. Should be HI, if LOW
then cut R945 (if fitted). If HI but no power
down timing (see below) then cut R991.
3) Check power down logic timing (>5mS).
2.2.3 AUDIO FEEDBACK TRIM
(For sound on vision)
If sound on vision is seen with maximum bass 1/
2 volume on normal Picture - STEREO Sound
then cut trim resistor R969A (to change R969
value to 22K)
2.2.4 HIGH VOLTAGE LIMITER CIRCUIT
CHECK
1) Mount the PW board to the set and adjust
normally.
2) Receive the circle pattern signal.
3) Set the contrast and brightness to maximum.
4) Add R=470K in parallel with R718 and R749.
5) Check that picture and sound disappear when
R is added.
NOTE: High voltage limiter circuit jig:
25” 29”
R718 229K 240K
R749 47K 4K7
R719 3K3 56K
To comparison circuit 10953 (Protection)
2.2.5 ANODE/FOCUS SHORT-CIRCUIT TEST
PROTECTION CIRCUIT CHECK
1) Receive the circle pattern signal.
2) Set the contrast/brightness to maximum.
3) Check trip point by adding an external D.C.
supply across R730. The set should not trip
when a 0.8V supply is added. The set should
trip when a 1 .2V supply is added.
2.2.6.SUB POWER SUPPLY ADJUSTMENT
1) Switch on power supply (mains input 230V ±
5V 50Hz).
2) Measure +9.5V output. If output is greater
than 9.8V then cut R9107 (220K 1/4W).
3) Re-check +9.5V output: output must be +9.5V
± 0.3V.
2.2.7.SUB POWER SUPPLY TEST
Test for:
TEST SPECIFICATION
+9.5V +26V
1) Load regulation +9.5V + 0.3V +26V+4V-1.5V
- 0.7V
2) Voltage regulation +9.5V + 0. 3V +26V+4V-1.5V
- 0.7V
3) Ripple voltage 300mV 400mV
(at 200V VAC IN)
4) Short circuit No Failure No Failure
+9.5V and +26V
5) Standby (all rails should 0V 0V
be at 0V
6) Remote on/off operation Hi/Low Hi/Low
TEST LOAD
+ 9.5V + 26V
Max 200mA 2A
Min 50mA 0.1A
2.2.8.C28300 POWER SUPPLY SETTING
(MAIN BOARD)
1) Connect DVM to +B line.
2) Adjust ac. mains input to 190V a.c.
3) Adjust VR923 and VR950 to mid-point
positions.
4) Turn TV on and adjust VR950 until +B is as
per table below.
5) Switch TV into standby.
6) Connect load A across C955 and load B
across C967.
7) If set trips out with loads A and B then go to
step 8, if not, then adjust VR923 clockwise
until TV shuts down.
8) Disconnect a.c. mains input and loads A and B.
9) Connect load C across C955 and load D
across C967.
10) Connect a.c. mains input.
11) If P.S.U. remains operative when switched
on with loads C and D connected then
alignment is correct.
12) If P.S.U. shuts down then alignment is
incorrect. (Adjustment complete).
13) Disconnect a.c. mains input and loads C
and D. Adjust VR923 to mid. point position
and proceed from step 5.
MODEL +B
C28300 149.8 ➝ 150.2V
LOAD A: +B LOAD = 180R 123W (149V)
LOAD B: AUDIO LOAD = 10R 62W
LOAD C: +B LOAD = 200R 111W (149V)
LOAD D: AUDIO LOAD = 11.4 54.8W
3.1 PICTURE POSITION/SHAPE
3.1.1 HORIZONTAL PHASE, VERTICAL
CENTRE, VERTICAL AMPLITUDE
1) Wait 5 minutes minimum after switching on
the mains before adjustment.
2) Receive the Philips circle pattern.
3) Set brightness and contrast to maximum.
4) The set should face North or South.
5) AC input should be 230V ± SV 50Hz.
6) Adjust software control in service mode using
appropriate controls.
7) Adjust control so that the centre of the picture
is as in the diagram below.
3.1.2 TILT, PARABOLA, WIDTH.
1) Allow 5 minutes warm up time before
adjustment.
2) Receive Philips circle pattern.
3) Set brightness and contrast to nominal.
4) The set should face North or South.
5) AC input should be 230V ± 5V 50Hz.
6) Adjust software in service mode using
handset so that the vertical lines at the
outside edges of the screen are adjusted to
be roughly vertical.
7) Adjust the software in service mode using
handset so that the (approximately) vertical
lines at the sides of the screen are adjusted
as vertical as the centre of the screen.
8) Adjust the software in service mode using
handset so that the castillations at the sides
of the picture are not quite visible. Reduce the
brightness and contrast to make sure that the
picture width has not reduced so that you can
see beyond the castellations. You may have
to repeat stages 6 and 7 again.
3.2 FOCUS ADJUSTMENT
1) Receive the Philips circle pattern.
2) Adjust after horizontal/vertical has been
adjusted.
3) Switch the received signal to the cross hatch
signal.
4) Turn the focus VR gradually clockwise from
the full counter clockwise position so that the
focus of the vertical line in the centre part,
furthest to the right is adjusted for best result
(contrast - maximum, brightness - normal).
3.3 CUT-OFF ADJUSTMENT
1) Rough adjustment.
(1.1) Set to video mode with no signal.
(1.2) Turn screen pot of FBT until flyback lines
disappear.
2) Fine adjustment
(2.1) Set contrast to mm, brightness to mid,
colour to mid.
(2.2) Receive cross hatch pattern.
(2.3) Connect probe to CRT green cathode.
(2.4) Adjust screen pot until black level is 170V
(29”) 160V (25”).
3.4 WHITE BALANCE ADJUSTMENT
(After cut off set correctly)
1) Set white balance to ‘Norm’ in picture
(enhanced features menu).
Contrast - Minimum
Brightness - Mid. Point (fine adjust using
colour analyser)
Colour - Mid point
2) Adjust red and blue level registers of
TDA4780 to get correct low light according to
colour temperature required (9300K or
7400K). See tables below.
7400K ‘Norm’ X - 304. y - 320
Colour Temp. Red Gain Green Gain Blue Gain
Cool - 9300K 36 30 26
Norm 7400K 40 30 18
Warm - 6500K 43 30 16
Colour Temp. Red Level Green Level Blue Level
Cool - 9300K P-9 20 Q +12
Norm 7400K P 20 Q
Warm - 6500K P+7 20 Q 3
P and Q adjusted for correct reading on colour
analyser in Norm mode. For Warm and Cool
modes use offsets in table but do not adjust for
exact colour temperatures.
C28300 9300K
9300K ‘Norm’ X - 284. y -299
Colour Temp. Red Gain Green Gain Blue Gain
Cool - 10000K 32 30 20
Norm 9300K 36 30 26
Warm - 7400K 40 30 18
Colour Temp. Red Level Green Level Blue Level
Cool - 10000K P-7 20 Q +5
Norm 9300K P 20 Q
Warm - 7400K P+7 20 Q -12
P and Q adjusted for correct reading on colour
analyser in Norm mode. For Warm and Cool
modes use offsets in table but do not adjust for
exact colour temperatures.
4. PinP ADJUSTMENT
1) Receive grey scale pattern (more than 8
steps).
2) Connect oscilloscope to CRT green cathode.
3) Turn on PinP using handset and move to
bright side of screen.
4) Adjust PinP contrast as follows. Contrast
values stores in E2 and will, indirectly, adjust
PinP contrast. PC software may become
available later.
Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont’d / Text Diagram / Voltage Tables / Voltage Tables Cont’d / 16:9 Deflection PCB
Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300)
Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)
3HITACHI C2576 TN
IC001
Voltage Tables
PIN VOLTAGE PIN VOLTAGE
1 4.3V (Power good) 29 Use scope D1/A1
2 0V (AVI switch) 30 Use scope D2/A2
3 4.7V (R/C input) 31 Use scopeD3/A3
4 0V (AV2 switch) 32 Use scope D4/A4
5 Use scope shift clock 33 Use scope D5/A5
6 Use scope shift clock 34 Use scope D6/A6
7 N/C 35 Use scope D7/A7
8 0V Mute 36 GND
9 Use scope shift enable 37 GND
10 5V D.EN. 38 GND
11 0V Customer mode (5V Service mode) 39 5V P/D
12 4.7V Out of ST.BY (0V in stand by) 40 4.7V SDA
13 1.7V OSC.OUT 41 4.7V SCL
14 0V VSS 42 5V VDD
15 0V Vss 43 5V VDD
16 Use scope OSC Out 44 Use scope A5
17 N/C 45 Use scope D5
18 5V Reset 46 Use scope R\W
19 5V A8 47 Use scope SDI
20 5V A9 48 OV LED DIM (Norm 5V LED Bright stand by)
21 5VA10 49 N\C
22 0V N/C 50 N\C
23 5V A11 51 4.6V Mode switch position A
24 0V A12 52 V VOL 25 0V A13 53 5V VOL +
26 5V A14 54 5V PROG 27 0V A15 55 SV PROG +
28 Use scope D0/A0 56 5V SVHS switch (OV when SVHS plug inserted)
Pins marked as “use scope” are digital pulses between OV and 5V giving irratic readings using
a multi-meter or digital multi-meter.
IC002
PIN VOLTAGE PIN VOLTAGE
1 5V (Vcc) 17 2.7V (D0)
2 4.7V (P/D) 18 l.9V (D7)
3 1.4V (A9) 19 1.7V (D6)
4 3.3V (A8) 20 2.SV (D5)
5 1.9V (A4) 21 1.7V (D4)
6 2.1 V (AS) 22 0V (CE)
7 1.7V(A6) 23 0V (A15)
8 1 .6V (A7) 24 2.2V (OE)
9 1.8V (A0) 25 0V (A14)
10 1.7V (A1) 26 4.4V (A13)
11 1.8V (A2) 27 4.7V (A12)
12 1.7V (A3) 28 3.0V (A11)
13 2.SV (D3) 29 1.4V (A10)
14 2.6V (D2) 30 5.0V (Vcc)
15 2.4V (D1) 31 5.0V (Vcc)
16 OV (GND) 32 5.0V (Vcc)
Voltages taken using a D.M.M. Data (D)
and address (A) lines being digital pulse
between OV and +5V.
IC003
PIN VOLTAGE PIN VOLTAGE
1 OV (OE) 11 1.0V (LE)
2 1.8V (A0) 12 1.6V (A7)
3 2.6V (D0) 13 1.8V (D6)
4 2.4V (D1) 14 1.8V (D7)
S 1.8V (A1) 15 1.7V (A6)
6 1.9V (A2) 16 2.1V (AS)
7 2.5V (D2) 17 2.5V (DS)
8 2.SV (D3) 18 1.7V (D4)
9 1.8V (A3) 19 2.0V (A4)
10 0V (GND) 20 5.0VC (Vcc)
IC004
PIN VOLTAGE PIN VOLTAGE
1 1.8V 8 5.0V
2 0.1V 9 5.0V
3 2.7V 10 0V
4 2.3V 11 5.0V
5 1.9V 12 5.0V
6 0.1V 13 0V
7 0V 14 5.0V
IC005
PIN VOLTAGE
1 4.7V SCL in
2 4.7V SCL out (set out of standby 0V set in standby)
3 4.6V SDA out (set out of standby 0V set in standby)
4 4.6V SDA in
5 4.8V Switch control supplied from +8V rail
6 0V Customer mode (5.0V service mode)
7 0V GND
8 4.6V SDA in
9 0V Customer mode (4.6V SDA out to Scart 1 service mode)
10 0V Customer mode (4.7V SCL out to Scart 1 service mode)
11 4.7VSCLin
12 0V Customer mode (5.0V service mode)
13 4.8V Switch control supplied from +8V rail
14 7.4V Set out of standby (4.7V set in standby)
IC006
PIN VOLTAGE
1 0V(GND)
2 0V(GND)
3 0V(GND)
4 0V(GND)
5 4.7V(SDA)
6 4.7V(SCL)
7 0V(GND)
8 SV (Vcc)
IC007
PIN VOLTAGE
1 SVTV/SVAV1/0VAV2/0VAV3(A.SEL2)
2 5V (Pos/Neg)
3 5V (L/L)
4 5V (0V RGB)
S0V
6N/C
7 0V (Compress)
8 0V(GND)
9N/C
10 4.3V (Power good)
11 SV(SC)
12 0V(SE)
13 0V(DS
14 0V(SD)
15 SV TV/ 0V AV1 / 5V AV2 / 0V AV3 (ASEL1)
16 SV(Vcc)
IC401
PIN VOLTAGE
1 3.8V(RFL)
2 3.0V(AVl.L)
3 3.8V (Audio out L.)
4 2.9V(AV3.L)
S 3.1V(AV2.L)
6 0V(GND)
7 0V(GND)
8 0V(GND)
9 0V TV/ 8V (AV1) 0V (AV2) 8V (AV3)
10 0VTV/ DV (AV1) 8V (AV2) 8V (AV3)
11 2.9V(AV3.R)
12 3.9V(RF.R)
13 3.9V (Audio out R.)
14 3V(AV2.R)
15 3V(AV1.R)
16 8V(Vdd)
IC101
VOLTAGE
Input 21.8V
GND 0V
Output 12V
IC601
PIN VOLTAGE
1 2.3V (V. Drive)
2 2.2V (V. Drive)
3 8.9V
4 18V (+18V Supply)
5 8.8V
6N/C
7 0V(GND)
8 49.7V (V. Output supply)
9 9.3V (V. Output)
10 2.4V(V.Pulse)
11 6.3V (E.W. Output)
12 0.7V (EW. Input)
13 0V(GND)
IC902
PIN VOLTAGE
1 12.6V
2 li.4V
3N/C
4 —8.2V
S —8.iV
6 N/C
IC901
PIN VOLTAGE
1 137.2V
2 137.0V
3N/C
4 - 8.2V
S 0.6V
6N/C
IC9101
PIN VOLTAGE
1 7.3V
2 6.2V
3N/C
4
5
6N/C
IC950
VOLTAGE
Input 12.SV
GND 0V
Output 5V
IC951
VOLTAGE
Input 10.9V
GND 0V
Output 8.1V
IC952
VOLTAGE
Input 7.7V
GND 0V
Output 5V
IC954
VOLTAGE
Input 12.SV
GND 0V
Output 2.5V
IC4410
PIN VOLTAGE
1 3.6V (Left output)
2 8V (Vcc)
3 3.6V (Right output)
4 0V(GND)
5 0.6V (R. I/P—)
6 DV (R. I/P+)
7 0V (L. l/P+)
8 0.6V (L. l/P—)
IC4550
PIN VOLTAGE
1 1.7V(R. l/P)
2 1.7V (RE/B)
3 15.2V (Mute)
4 1.7V(L. F/B)
5 1 .7V (L. l/P)
6 0V(GND)
7 0V(GND)
8 13.8V(L.O/P)
9 27.9V (Supply)
10 3.9V(R.O/P)
11 N/C
IC4500
PIN VOLTAGE
1 1.6V
2 1.7V
3 15.3V
4 1.7V
5 1.6V
6DV
7DV
8 13.8V
9 28.4V
10 13.8V
11 28.4V
IC4700
PIN VOLTAGE
1 1 .7V (Left surround
in)
2 1 .7V (L. surround F/
B)
3 14.3V (Mute)
4 1 .7V (R. surround F/
B)
5 1 .7V (Right surround
in)
6 0V(GND)
7 0V(GND)
8 12.8V (R. surround
out)
9 26.2V (Supply)
10 12.8V (L. surround
out)
11 0V(GND)
IC4800
PIN VOLTAGE
1 12.4V (Centre in)
2 12.5V (—VE I/P)
3 0.1V(GND)
4 12.5V (Centre out)
5 26.2V (Supply)
IC201
PIN VOLTAGE PIN VOLTAGE
1 3.3V (VIF) 17 2.7V (ViFM1)
2 3.3V (VIF) 18 0V (ViFM3)
3 0.7V (CBL/MAC) 19 8.4V (TAGC)
4 0.2V (VIF Export) 20 2.0V (V0Qss)
S 0.2V (VIF Export) 21 2.0V (V0VID)
6 1.4V (TADJ-AGC) 22 2.0V (V1VID)
7 2.7V (TPLL) 23 2V (AFC)
8 2.8V (CSAGC) 24 2.7V (VC01)
9 3.SV (STD) 25 2.7V (VC02)
10 2.4V (CVBS) 26 2.4V (CVP/2)
11 3.6V (FWLSWI) 27 0V (GND)
12 2.4V (V0AF1) 28 2.8V (CVAGC)
13 2.4V (V0AE2) 29 4.8V (VP)
14 2.3V (CAF1) 30 4.9V (INSWI)
15 2.3V (CAE2) 31 3.3V (VISIF)
16 1.9V(ViFM2) 32 3.3V(VISIF)
IC301
PIN VOLTAGE PIN VOLTAGE
1 4.3V (Comb Luma in) 11 3.9V (V1 in)
2 4.7V(SDA) 12 3.1V(N/C)
3 S.2V (Comb Chroma in) 13 5.8V (C out)
4 4.7V (SCL) 14 3.9V (CBS/Y out)
5 3.9V (V2/Y2 in) 15 3.8V (N/C)
6 5.3V (C2 in) 16 3V (CVBS/Y Pinp out)
7 0V (GND) 17 3.8V (CVBS Comb out)
8 3.9V (V3/Y3 in) 18 3.8V (C Pinp out)
9 10.4V(Vcc) 19 0V(Vss)
10 5.2V (C3 in) 20 4.3V (RE Video in)
IC501
PIN VOLTAGE PIN VOLTAGE
1 2.5V (Y out) 17 0.8V (E/W Drive)
2 2.2V (R-Y out) 18 3.1V (H.Drive)
3 2.1V (B-Y out) 19 0.6V (HElyback)
4 4.7V (SCL) 20 3.3V (Pinp output)
5 4.7V (SDA) 21 3.9V (H.PLL Filter)
6 0.7V (Sandcastle) 22 0V (SVHS C in)
7 7.8V (Vcc) 23 3.8V (SNVHS Y in)
8 SV (Decoup) 24 2.6V (CVBS2 in)
9 0V(DIG.GND) 25 2.4V (N/C)
10 0.4V (N/C) 26 3.8V (CVBSl in)
11 3.8V (Vert/Sawtooth) 27 0V (Analogue GND)
12 3.9V (IRE) 28 3.4V (Filter REF)
13 0V (Analogue GND) 29 4.6V (Copper PLL Filter)
14 2V (EHT Track) 30 2.2V (REF XTAL)
15 2.3V (V.Drive A) 31 1.5V (2nd XTAL)
16 2.4V (V.Drive B) 32 0.1V (Secam Decoup.)
IC502
PIN VOLTAGE PIN VOLTAGE
1 5.7V (Vcc) 9 5.7V (Vcc)
2 OV(NC) 10 0V(GND)
3 DV (GND) 11 3V (R-Y out)
4 0V(GND) 12 3V(B-Yout)
S 0.7V (Sandcastle) 13 0V (N/C)
6 DV (N/C) 14 1 .5V (B-Y in)
7 3.2V (N/C) 15 DV (N/C)
8 0V(GND) 16 1.5V(R-Yin)
IC503
PIN VOLTAGE PIN VOLTAGE
1 7.5V (Vcc) 10 4.7V (SCL)
2 2.1V 11 2.SV
3 2.5V (R-Y in) 12 4.7V (Y out)
4 2V(R-Yout) 13 2.5V
S 7.5V(Vcc) 14 2.5V
6 1.9V (B-Y out) 15 3.2V
7 2.5V (B-Y in) 16 3.1V (Yin)
8 DV (GND) 17 0.7V (Sandcastle)
9 4.7V(SDA) 18 0V(GND)
IC505
PIN VOLTAGE PIN VOLTAGE
1 0V (ESW) 15 5V (BCL)
2 5V (R2 in) 16 5V (CPDL)
3 5V(G2 in) 17 5.1V(CL)
4 5V (B2 in) 18 2.2V (W1)
5 8V(Vp) 19 5.7V (C1)
6 4V (B-Y in) 15 2.9V (B out)
7 4V (R-Y in) 16 3.3V (CB)
8 3.9V(Y in) 17 3.2V(G out)
9 0V (GND) 28 3.5V (CG)
10 5V (R1 in) 28 3.SV (R out)
11 5V (G1 in) 28 3.4V (CR)
12 5V (B1 in) 28 2.SV (VM Drive)
13 0.2V (ESW) 28 4.7V (SDA)
14 0.7V (Sandcastle) 28 4.7V (SCL)
IC953
PIN VOLTAGE PIN VOLTAGE
1 11.4V (PG O/P) 8 2.5V (Comp.3 l/P—)
2 18.4V (Comp.l O/P) 9 2.2V (Comp.3 I/P+)
3 18.SV (Vcc) 10 2.8V (Comp.4 l/P—)
4 8.1V (Comp.l l/P—) 11 2.5V (Comp.4 l/P+)
S 9.1V(Comp.i I/P+) 12 0V(GND)
6 2.5V (Comp. 2 I/P—) 13 0.1V (Comp.4 O/P)
7 2.7V (Comp.2 l/P+) 14 0.1V (Comp.3 O/P)
IC4201
PIN VOLTAGE PIN VOLTAGE
1 N/C 27 2.5V (VCONT)
2 N/C 28 2.4V (MIXREF)
3 4.8V (VddA) 29 2.4V (DaPSK)
4 0V (VssA) 30 2.5V (COFF)
5 2.4V (VRCA) 31 N/C
6 N/C 32 1.7V(PUDET)
7 2.4V (EMR) 33 2.4V (VROE)
8 2.7V (OPR) 34 2.4V (IREF)
9 N/C 35 2.4V (VRCF)
10 N/C 36 2.4V(VddF2)
11 2.4V (VROA) 37 0V (VssF2)
12 2.7V (VssDAC) 38 N/C
13 N/C 39 4.3V (CLKLPF)
14 N/C 40 4.3V(XTAL)
15 2.7V (OPL) 41 2.5V (OSC)
16 2.7V (EML) 42 DV (VssX)
17 N/C 43 5Vpp Pulses (Data in)
18 2.7V (PORM) 44 0V (VssD)
19 2.7V(PORA) 45 N/C
20 2.7V (REMVE) 46 4.8V (VddD)
21 2.7V (REMO) 47 4.3V (Reset)
22 N/C 48 5Vpp Pulses (Data out)
23 2.7V (S0FF) 49 4.7V (SCL)
24 2.7V (VssEl) 50 4.7V (SDA)
25 N/C 51 N/C
26 2.7V(VddEl) S2 N/C
IC4300
PIN VOLTAGE PIN VOLTAGE
1 4V (OP. Amp.1 O/P) S 4V (OP. Amp.2 l/P+)
2 4V (OP. Amp.1 I/P) 6 4V (OP. Amp.2 l/P—)
3 4V (OP. Amp.1 l/P) 7 4V (OP. Amp.2 O/P)
4 0V (GND) 8 8.1V (Supply)
IC4400
PIN VOLTAGE PIN VOLTAGE
1 N/C 17 4.7V (SDA)
2 0.2V (P1) 18 3.9V (L. O/P to Amp.)
3 3.9V (Main left in) 19 3.9V (L. Treble)
4 7.9V (Ref. V) 20 3.9V (L. Headphone O/P)
5 3.9V (Main right in) 21 3.9V (L. Bass)
6 7.9V (Vcc) 22 3.9V (L. Bass)
7 3.9V (R. Scart out) 23 3.9V (L. in)
8 0V (GND) 24 3.9V (L. out)
9 3.9V (R. out) 2S 0V (GND)
10 3.9V (R. in) 26 3.9V (L. Scart out)
11 0V (R. Bass) 27 3.9V (Pseudo stereo)
12 3.9V (R. Bass) 28 N/C
13 3.9V (R. Headphone O/P) 29 3.9V (Pseudo stereo)
14 3.9V (R. Treble) 30 N/C
15 2.3V (R. O/P to Amp.) 31 0.7V (P2)
16 4.7V(SCL) 32 N/C
IC4600
PIN VOLTAGE PIN VOLTAGE
1 4.5V 22 2.8V
2 4.5V 23 2.7V
3 4.4V 24 2.7V
4 4.4V 25 5.2V
5 4.4V 26 4.4V
6 4.4V 27 5.1V
7 4.4V 28 4.4V
8 4.4V 29 4.4V
9 4.4V (L. in) 30 4.4V
10 4.4V (R. in) 31 4.4V
11 DV (GRD) 32 4.4V
12 4.4V 33 4.4V
13 4.4V 34 4.4V (C. out)
14 4.4V 35 4.4V (S. out)
15 4.4V 36 4.4V (R. out)
16 5.1V 37 4.4V (L. out)
17 4.4V 38 8.8V (Vcc)
18 5.1V 39 0.1V
19 4.4V 40 5V (Enable)
20 4.4V 41 0V (Data)
21 4.3V 42 5V (CLK)
IC4601
PIN VOLTAGE PIN VOLTAGE
1 DV (D. GND) 13 4.4V (Surround out)
2 5V(CLK) 14 4.4V
3 0V (Data) 15 4.4V (Front R. out)
4 5V (Enable) 16 4.4V (Front L. out)
5 2.4V 17 0V(A.GND)
6 7.5V 18 4.4W
7 8.9V (Supply) 19 4.4V
8 4.4V (L. in) 20 4.4V
9 4.4V (R. in) 21 4.4V
10 4.4V 22 4.8V
11 4.4V 23 2.3V(XTAL)
12 4.4V 24 2.2V(XTAL)
IC4603
PIN VOLTAGE PIN VOLTAGE
1 3.8V(S. In) 17 2.4V(SDA)
2 N/C 18 3.8V (C. Out)
3 3.8V (C. E+R Mix) 19 3.8V
4 7.5V (Ref. V) 20 3.8V
S 3.8V (S. In) 21 3.8V
6 7.6V (Vcc) 22 3.8V
7 N/C 23 3.8V
8 0V(GND) 24 3.8V
9 3.8V 2S 7.6V
10 3.8V 26 3.8V
11 3.8V 27 3.8V
12 3.8V 28 3.8V (C. In)
13 3.8V 29 3.8V
14 3.8V 3D 3.8V(S. In)
15 3.8V (S. Out) 31 0V
16 2.4V(SCL) 32 N/C
Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont’d / Text Diagram / Voltage Tables / Voltage Tables Cont’d / 16:9 Deflection PCB
Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300)
Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)
HITACHI C2576 TN
Voltage Tables
4
Cont’d
In 5V DV 5V Dependent on agc
Control 0V 2.2V -1 .9V 0V
Out 5V DV 5V Dependent on agc
B 3.8V DV 2.3V
C 12.1V DV 1.6V
E 3V DV 4.9V
B 3.6V 3.9V 4.9V 3.7V 0V 2.6V 7.3V
C 7.3V 7.4V 4.9V 7.9V 0V 7.6V S.6V
E 2.9V 3.2V 0V 3V 0.7V 1.9V 7.9V
B 4.9V 4.9V 4.4V 4.6V 3.7V 3.7V 3.6V
C 0V 0V 12V 12V 3.1V 3.iV 2.9V
E 0V 0V 3.8V 3.9V 7.9V 7.9V 7.9V
B 3.5V 3.7V 3.7V
C 2.9V 3.1V 3V
E 7.9V 7.9V 7.9V
B 3.3V 7.3V 12.3V
C 7.3V 5.1V DV
E 2.7V 7.9V 12.2V
B -1V 3.iV 0.5V
C 33.3V 8.2V 164.5V
E 0V 2.8V 0.6V
B 11.7V 8V 7.9V 7.6V
C 12.5V 7.3V 7.2V 6.8V
E 11.0V 9.9V 0.1V 9.9V
B 0.7V 0.1V 3.6V 3.7V 0.4V
C 0.5V S.8V 7.SV 7.SV 0V
E 6.5V 11V 4.3V 4.3V 1V
B D.4V 0.4V 2.1V 3.7V
C DV DV 3.2V 0V
E 1V 1V 1.4V 4.3V
B —3.2V 0.6V —4.2V —8V
C —4.6V —3.2V 398V —4.6V
E —8.1V 0V 0V —8.1V
B 27.2V 27.9V 0.7V 6.8V 0.7V 3.2V 0.2V G 37.2V
C 12.7V 28.7V 0V 138.1V 0V 3.2V 37.2V D 28.5V
E 12.6V 28.7V 0V 6.2V 0V 0V 0V S 28.5V
B 2.2V 2.3V
C 4.4V 4.6V
E 1.6V 1.6V
B 0.7V 0V Woofer sat at mid.
C0V0V
E0V0V
B4V4V
C8V8V
E 3.3V 3.3V
B 0.1V
C 15.3V
E0V
B4V4V
C 8.2V 8.2V
E 3.3V 3.3V
B 4.4V 4.4V 4.4V 4.4V
C 3.7V 3.7V 3.7V 3.7V
E9V9V9V9V
B 0V 0V 0.7V
C0V0V0V
E 14.3V 12.5V 0V
B 3.8V
C 3.1V
E 7.9V
Q001 QOD2 Q003 Q101
Q201 Q202 Q203
Q301 Q302 Q3D3 Q304 Q305 Q306 Q307
Q402 Q403 Q405 Q4D6 Q407 Q4D8 Q409
Q410 Q411 Q412
Q501 Q502 Q510
Q701 Q705 Q751
Q810 Q811 Q812 Q813
Q851 Q852 Q856 Q857 Q859
Q860 Q861 Q862 Q863
Q901 Q902 Q903 Q904
Q950 Q961 Q952 Q954 Q953 Q955 Q959 Q960
Q4201 Q4202
Q4300 Q4301
Q4400 Q4401
Q4501
Q4450 Q4451
Q4600 Q4601 Q46D4 Q4605
Q4700 Q4800 Q4801
Q5000
Text Diagram
Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont’d / Text Diagram / Voltage Tables / Voltage Tables Cont’d / 16:9 Deflection PCB
Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300)
Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)
5HITACHI C2576 TN
16:9 Deflection PCB
Diagram
Compression Circuit Diagram
Specifications / Safety Parts / Menu Trees / Service Mode / Service Mode Cont’d / Text Diagram / Voltage Tables / Voltage Tables Cont’d / 16:9 Deflection PCB
Compression Circuit / RGB Processing / Dolby Audio 1 & 2 / PIP Circuit 1 & 2 / Power & Deflection 1 & 2 (C28300) / Signal Processing Diagram (C28300)
Signal Processing (C2576/77TN - 311, CP2576TAN-301/351, CP2576TAN-331/381) / Signal Processing Diagram (CL2576, CP2576, CL2976, CP2976, C2976TA, C2975TAN, C2976TN)
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