DOWNLOAD Sharp 32LF-92H (serv.man2) Service Manual ↓ Size: 1.78 MB | Pages: 76 in PDF or view online for FREE

The TCET110/ TCET2100/ TCET4100 consists of a phototransistor optically coupled to a gallium 
arsenide infrared-emitting diode in a 4-lead up to 16-lead plastic dual inline package. The elements are 
mounted on one lead frame using a coplanar technique, providing a fixed distance between input and 
output for highest safety requirements.

 

Circuits for safe protective separation against electrical shock according to safety class II (reinforced 
isolation): 
For appl. class I – IV at mains voltage 

”300 V 

For appl. class I – III at mains voltage 

”600 V 

According to VDE 0884, table 2, suitable for: Switch-mode power supplies, line receiver, computer 
peripheral interface, and microprocessor system interface. 

VDE 0884 related features: 
Rated impulse voltage (transient overvoltage) V 

IOTM 

= 8 kV peak 

Isolation test voltage (partial discharge test voltage) V 

pd 

= 1.6 kV 

Rated isolation voltage (RMS includes DC) V 

IOWM 

= 600 V 

RMS 

(848 V peak) 

Rated recurring peak voltage (repetitive) V 

IORM 

= 600 V 

RMS

 

 
General features: 
CTR offered in 9 groups 
Isolation materials according to UL94-VO 
Pollution degree 2 (DIN/VDE 0110 / resp. IEC 664) 
Climatic classification 55/100/21 (IEC 68 part 1) 
Special construction: Therefore, extra low coupling capacity of typical 0.2pF, high Common  Mode 
Rejection 
Low temperature coefficient of CTR  
G = Leadform 10.16 mm; provides creepage distance > 8 mm, for TCET2100/ TCET4100 optional; 
suffix letter ‘G’ is not marked on the optocoupler  
Coupling System U 
 

The TDA9885 is an alignment-free single standard (without positive modulation) vision and sound IF signal 
PLL.  

5 V supply voltage 
Gain controlled wide-band Vision Intermediate Frequency (VIF) amplifier (AC-coupled) 
Multistandard true synchronous demodulation with active carrier regeneration (very linear demodulation, 

good intermodulation figures, reduced harmonics, excellent pulse response) 
Gated phase detector for L/L accent standard 
Fully integrated VIF Voltage Controlled Oscillator (VCO), alignment-free; frequencies switchable for all 
negative and positive modulated standards via I

2

C-bus  

Digital acquisition help, VIF frequencies of 33.4, 33.9, 38.0, 38.9, 45.75 and 58.75 MHz 
4 MHz reference frequency input [signal from Phase-Locked Loop (PLL) tuning system] or operating as 
crystal oscillator 
VIF Automatic Gain Control (AGC) detector for gain control, operating as peak sync detector for negative 
modulated signals and as a peak white detector for positive modulated signals 
Precise fully digital Automatic Frequency Control (AFC) detector with 4-bit digital-to-analog converter; AFC 
bits via I

2

C -bus readable 

TakeOver Point (TOP) adjustable via I

2

C-bus or alternatively with potentiometer 

Fully integrated sound carrier trap for 4.5, 5.5, 6.0 and 6.5 MHz, controlled by FM-PLL oscillator 
Sound IF (SIF) input for single reference Quasi Split Sound (QSS) mode (PLL controlled)

 

SIF AGC for gain controlled SIF amplifier; single reference QSS mixer able to operate in high performance 
single reference QSS mode and in intercarrier mode, switchable via I

2

C-bus 

AM demodulator without extra reference circuit 
Alignment-free selective FM-PLL demodulator with high linearity and low noise 
I

2

C-bus control for all functions 

I

2

C-bus transceiver with pin programmable Module Address (MAD).

 

 
SYMBOL PIN  DESCRIPTION 
VIF1 1 

VIF differential input 1

 

VIF2 

 

2 

VIF differential input 2

 

OP1 

 

3 

output 1 (open-collector)

 

FMPLL

 

4 

FM-PLL for loop filter

 

DEEM

 

5 

de-emphasis output for capacitor

 

AFD 

6 

AF decoupling input for capacitor 

DGND 

7 

digital ground 

AUD 

8 

audio output 

TOP 

9 

tuner AGC TakeOver Point (TOP) 

SDA 

10 

I

2

C-bus data input/output 

SCL 

11 

I

2

C-bus clock input 

SIOMA 

12 

sound intercarrier output and MAD select 

n.c. 

13 

not connected 

TAGC 

14 

tuner AGC output 

REF 

15 

4 MHz crystal or reference input 

VAGC 

16 

VIF-AGC for capacitor; note 1 

CVBS 

17 

video output 

AGND 

18 

analog ground 

VPLL 

19 

VIF-PLL for loop filter 

V

P

 20 

supply voltage (+5 V) 

AFC 

21 

AFC output 

OP2 

22 

output 2 (open-collector) 

SIF1 

23 

SIF differential input 1 

SIF2 

24 

SIF differential input 2 

 

The PI5V330 is well suited for video applications when switching composite or RGB analog. 
 
 
 
 

 
14.1.SERVICE MENU 
All system, geometry and white balance alignments are performed in production service mode. Before 
starting the production mode alignments, make sure that all manual adjustments are done correctly. To 
start production mode alignments enter the MAIN MENU and then press the digits 4, 7, 2 and 5 
respectively or press MUTE and INFO buttons at the same time. The following first menu appears on 
the screen.  
 
 
 
 
 
 
 
 
 
 
 
 
You can select Adjust or Options items by pressing Up/Down buttons. Selected parameter will be 
highlighted. In order to enter the selected parameter, press Left or Right button. To exit the service 
menu press MENU button. Entire service menu parameters of AK45 CHASSIS are listed below.  
 
14.2.ADJUST MENU 
Select the parameter by pressing up/down buttons. Adjust the parameter by pressing Left/Right 
buttons. In ADJUST menu, changed values are stored automatically. 
 
 
 
 
 
 
 
 
 
 
 
 
 
White Point Red, White Point Green, White Point Blue: 
Not used. 
 
AGC  
Apply PAL BG signal, VHF-3 Channel-12 and 60dBµV signal level. Adjust AGC (Automatic Gain 
Control) item by pressing Left/Right buttons till the voltage at AGC point (pin1 of the tuner) becomes 3.0 
volts. 
 
If PLL negative  
Not used. 
 
If PLL positive  
Not used. 
 
Y-Delay 
Enter a PAL B/G colour and black-white bar test pattern via RF. Adjust Y-Delay for PAL till the colour 
transients on the colour bar of the pattern become as sharper and colours between transients do not 
mix with each other as possible.  
 

Y-Delay SECAM 
Enter a SECAM B/G colour and black-white bar test pattern via RF. Adjust Y-Delay SECAM till the 
colour transients on the colour bar of the pattern become as sharper and colours between transients do 
not mix with each other as possible. 
 
Y-Delay NTSC 
Enter an NTSC colour and black-white bar test pattern via RF. Adjust Y-Delay NTSC till the colour 
transients on the colour bar of the pattern become as sharper and colours between transients do not 
mix with each other as possible. 
 
Y-Delay other 
Not used. 
 
Vertical Position Offset 
This value is fixed (127) 
 
Vertical Position Offset 
This value is fixed (127) 
 
Horizontal Position Offset 
This value is fixed (127) 
 
Horizontal Position Offset 
This value is fixed (127) 
 
Vertical Blank Start 
This register will be used only at 4:3 tubes for 16:9 mode adjustment. It adjusts the vertical blank start 
position. 
 
Vertical Blank Stop 
This register will be used only at 4:3 tubes for 16:9 mode adjustment. It adjusts the vertical blank stop 
position. 
 
Angle 
Change Angle by pressing Left/Right buttons till the vertical lines of the crosshatch pattern become 
completely perpendicular to horizontal lines without any angle of vertical deviation. Check and readjust 
ANGLE item if the adjustment becomes improper after some other geometric adjustments are done. 
 
Bow 
Change Bow by pressing Left/Right buttons till the vertical lines especially ones close to the left and 
right sides will of equal and symmetrical bending, i.e. they together will neither be towards left side nor 
right side. Check and readjust BOW item if the adjustment becomes improper after some other 
geometric adjustments are done. 
 
4:3 Horizontal Blank Start 
This register will be used only at 16:9 tube for 4:3 mode adjustment. It adjusts the horizontal blank start 
position. 
 
4:3 Horizontal Blank Stop 
This register will be used only at 16:9 tube for 4:3 mode adjustment. It adjusts the horizontal blank stop 
position. 
 
EHTV Compensation 
It’s used to adjust the EHT compensation vertical gain coefficient. 
 
EHTTM Compensation 
It’s used to adjust the EHT compensation time constant. 
 
EHTEW Compensation 
It’s used to adjust the EHT compensation east/west gain coefficient.