Tuesday, April 06, 2021

Sony WRT 807B Schematic diagram, troubleshooting, disassemble and reassamble procedure - UHF SYNTHESIZED WIRELESS MICROPHONE

 

LCD readout of various information
The microphones LCD shows the current channel number, frequency, input attenuation setting, and residual battery power.
The accumulated battery use time is also indicated (in oneminute increments) to allow precise monitoring of battery use.
Automatic saving of channel and input attenuation settings
All channel and input attenuation settings are automatically saved when the microphone is turned off (and are maintained even when the battery is removed), thus eliminating the need to make the same settings again the next time you use the microphone.
Highly reliable electronic attenuator
Adjustable in a range of 0 dB to 21 dB in 3-dB steps, the built-in input level attenuator reduces signal distortion during the input of excessively strong audio signals.
Tone signal-incorporated RF carrier signal
The microphone transmits an RF carrier signal that incorporates a tone signal to enable any tuner with a tone squelch circuit to pick out only the target audio signal.
Wide dynamic range and low noise
The microphones compander (compressor/expander) system enables transmission over a wide dynamic range with minimum noise.

• When operating two or more microphones, keep the microphones separated from each other by a distance of at least 30 cm (1 foot).
• Keep the microphones at least 3 meters (10 feet) away from receiving antenna.

CH (channel) indication
Displays the transmitting channel.
Each time you press the SET button in Transmit mode, the channel indication changes as follows.

Transmitting channel: The current transmitting channel setting.
Transmitting frequency: The current transmitting frequency setting.
Attenuation: The input attenuation setting in decibels.  Can be set within a range of 0 dB to 21 dB in 3-dB steps.
Accumulated battery use time: The accumulated time of battery use (in 1-minute increments).

SET button
In Transmit mode, press this button to change the indicated items in the lower half of the liquid-crystal display.
To change to Setting mode, turn the POWER switch to ON while holding this button down. Then press this button to select the items to be indicated.

Initiating Setting Mode

Enter Setting mode to change the transmitting channel, the transmitting frequency and the attenuation level, or to reset the accumulated battery use time indication.
To enter Setting mode
While holding down the SET button, turn the POWER switch to ON.
Hold the SET button down until an indication appears on the liquid-crystal display.
The microphone enters Setting mode and the indication before the microphone was previously turned OFF flashes on the liquid-crystal display.
Pressing the SET button cycles the modes in the order of Channel selection mode, Frequency selection mode, Attenuator adjustment mode and Accumulated time indication reset mode.
Note
On the model available in Europe, the transmitting channels are grouped in four sets as shown in “Sony Wireless Microphone System Frequency List.”

[On the model available in Europe, set the channel group indication (the left two digits) first. Press the + or – button to toggle the channel group (e.g., for CE62 model: 00 y 62 y 63 y 64) and press the SET button. Then, the remaining four digits start to flash for setting the channel number]

Changing the Transmitting Channel

The transmitting channel can be selected through either the channel number or the frequency.
1 Set the microphone to Setting mode.  If the channel number (or frequency) indication does not appear,
(or)
press the SET button until the channel number frequency) indication appears.

Changing the Input Attenuation Setting

The input attenuation setting can be changed within a range of 0 dB to 21 dB (in 3-dB steps) in either Setting mode or Transmit mode.

Changing the input attenuation in Setting mode
1
Set the microphone to Setting mode.
2 If the attenuation level is not displayed, press the SET button until it appears.
3 Press the + or – button to change the attenuation setting.

4 Once the desired level appears, turn the POWER switch to OFF to release Setting mode, or press the SET button to continue operations in Setting mode.

The next time you turn on the microphone (by turning the POWER switch to ON), the microphone enter Transmit mode with the selected attenuation setting

Changing the input attenuation in Transmit mode
You can also change the input attenuation setting while transmitting
If button in Transmit mode.
1 the attenuation level is not displayed, press the SET until it appears.
2 Press the + or – button to change the attenuation setting.

Resetting the Accumulated Battery Use Time Indication

The accumulated battery use time is the total time (in hours and minutes) the battery has been used. It is recorded whenever the WRT-807B is on.
Reset the indication to 00:00 whenever you replace the battery.
1 Set the microphone to Setting mode.
2 If
4 Turn the accumulated battery use time is not displayed, press the SET button until it appears.
3 Press the – button.
The indication resets to 00:00.

Press the + button while the 00:00 indication is on to go back to previous value.

Troubleshooting

Disassembly procedure



Reassembly procedure

EEPROM (IC202, DP-306 board) replacement

When replacing EEPROM (IC202) on the DP-306 board or replacing DP-306 board, perform the following operation.
When the power is turned on initially after the replacement:
1. “Error 11” is indicated on the display.
2. Turn off the power. Next turn on the power again.
Confirm that “CE57B” (for CE57 model) is indicated on the display.
Confirm that “CE62B” (for CE62 model) is indicated on the display.
Confirm that “CE67B” (for CE67 model) is indicated on the display.
Confirm that “U30B” (for U30 model) is indicated on the display.
Confirm that “U42B” (for U42 model) is indicated on the display.
Confirm that “U62B” (for U62 model) is indicated on the display.
Confirm that “U66B” (for U66 model) is indicated on the display.

How to make a AF input cable

Schematic diagram and PWB layout









PWB



Friday, April 02, 2021

Sony STR NX5MD Tuner Amplifier - AEP, UK AND E MODELS - test mode, schematic diagram

 

 [CD Delivery Mode]
• This mode moves the optical pick-up to the position durable to vibration. Use this mode when returning the set to the customer after repair.
1. Press the Power  button to turn the power ON.
2. Press the [ENTER] and Power  buttons simultaneously.
3. A message “LOCK” is displayed on the liquid crystal display, and the CD delivery mode is set.

[Change-over the MW Tuning Interval]
• The MW tuning interval can be changed over 9 kHz or 10 kHz.
1. Press the Power  button to turn the power ON.
2. Press the [TUNER] button to select the function “TUNER”, and press the [TUNER BAND] button to select the BAND “MW”.
3. Press the Power  button to turn the power OFF.
4. Press the [TUNER MEMORY] and ?/1 buttons simultaneously, and the display on the liquid crystal display changes to “MW 9 k STEP” or “MW 10 k STEP”, and thus the tuning interval is changed over.

[MC Cold Reset]
• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set to the customer.
1. Turn the power ON or set to the DEMO mode.
2. Press the [GROOVE] and Power  buttons simultaneously.
3. The set is reset, and displays “COLD RESET”, then becomes DEMO mode.

[Amplifier Test Mode]
1. Press the Power  button to turn the power ON.
2. Press three buttons of [ENTER] , [DISPLAY] , and [TUNER BAND] simultaneously.
3. “ALC OFF” is displayed, then the function which was set before the test mode became active is displayed.

[LED and Liquid Crystal Display All Lit, Software Version Display, Key Check, VACS Level Display Mode]
1. Press the Power  button to turn the power ON.
2. Press three buttons of [ENTER] , [DISPLAY] , and [STEREO/MONO] simultaneously.
3. LEDs and liquid crystal display are all turned on.
Rotating the JOG dial changes over the check patterns of liquid crystal display.
4. Successively, the following three modes can be activated.
(1) Press the[VIDEO] button, and the software version is displayed on the liquid crystal display.
(2) Press the [MD] button, and the key check mode is activated.
In the key check mode, the liquid crystal display displays “K 0 J0 V0”. Each time a button is pressed, “K” value increases.
However, once a button is pressed, it is no longer taken into account.
“J” value increases like 1, 2, 3 ... if turn the JOG dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.
“V” value increases like 1, 2, 3 ... if turn the [VOLUME] dial clockwise, or it decreases like 0, 9, 8 ... if turn the JOG dial counterclockwise.
(3) Press the [TAPE] button, and the VACS level is displayed on the liquid crystal display.
5. To release from these mode, press three buttons in the same manner as step 2, or remove the power cord.

[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the memory. The hot reset mode functions same as if the power cord is plugged in and out.
1. Turn the power ON or set to the DEMO mode.
2. Press three buttons of [ENTER] , [DISPLAY] , and [TUNER MEMORY] simultaneously.
3. The set is reset, and becomes standby state.

 [Change-over of VACS ON/OFF]
1. Press the Power button to turn the power ON.
2. Press three buttons of [ENTER] , [DISPLAY] , and [GROOVE] simultaneously, and the display on the liquid crystal display changes to “VACS ON” or “VACS OFF”, and thus the VACS ON/OFF is changed over.
[VIDEO input, Record and CD play in CD function]
1. Press the Power button to turn the power ON.
2. Press three buttons of [ENTER] , [DISPLAY] , and -<< simultaneously.
3. “DVD 5.1CH” is displayed on liquid crystal display, and at the same time, CD is played and the deck B is placed in the record status.

[CD Service Mode]
• This mode can run the CD sled motor optionally. Use this mode, for instance, when cleaning the optical pick-up.
1. Press the Power button to turn the power ON.
2. Press the [CD] button to select the function “CD”.
3. Press three buttons of [ENTER] , [POWER SAVE/DEMO (STANDBY) , and [STEREO/MONO] simultaneously.
4. Set to the Sled Servo mode.
5. With the CD in stop status, turn the JOG dial clockwise to move the optical pick-up to outside track, or turn it counterclockwise to inside track.
6. To release from this mode, perform as follows.
1) Move the optical pick-up to the most inside track.
2) Remove the power cord.
Notes: • Always move the optical pick-up to most inside track when releasing from this mode. Otherwise, a disc will not be unloaded.
• Do not run the sled motor excessively, otherwise the gear can be chipped.

[Aging Mode]
This mode can be used for operation check of CD section and tape deck section.
CD section and tape deck section work in parallel.
• If an error occurred:
The aging operation stops only an error occurred sections and display then status.
• If no error occurs:
The aging operation continues repeatedly.
1. Set disc in DISC5 tray.
2. Load the tapes into the decks A and B respectively.
3. Press the [PLAY MODE] button to set the “ALL DISCS” mode, and press the [REPEAT/PTY] button to “REPEAT” off.
4. Press the [CD] button to select the function “CD”.
5. Press three buttons of [ENTER] , [POWER SAVE/DEMO (STANDBY) , and [TUNER BAND] simultaneously.
6. The aging mode is activated, if the indicator of disc tray number on the liquid crystal display is blinking.
7. To release from the aging mode, press the Power button to turn the power OFF and operate the cold reset. (Refer to the “MC Cold Reset”)

Display at the Aging Mode
• Display operating state of CD section and tape deck section alternately.
• If an error occurred, stop display which that section.
2. CD Section
• Display at the aging mode is the same as the normal operation.
• The sequence during the aging mode is following as below.

• Display at an error occurred
1) Display of the error count
(1) Press three buttons of [ENTER] , [POWER SAVE/DEMO
(STANDBY) , and [GROOVE] simultaneously.
(2) Display of the error count following as below.

Notes:
EMC**: The number of mechanical error.
EDC** : The number of no disc error after chucking the disc.

2) Display of mechanical error

Notes:
**: The number of mechanical error.(“00” is latest one)
(Press the [PLAY MODE] button to changes next error display)
## : Not used.
$$ : Loading error. (Second figure is not used)
D : The error in the midst of close at the except mechanical trouble.
E : The error in the midst of open at the except mechanical trouble.
C : The error in the midst of chuck up at the except mechanical trouble.
F : The error in the midst of EX-open at the except mechanical trouble.
&&: Loading error. (Second figure in not used)
1:The error in the midst of chuck up.
2:The error in the midst of chuck down.
3:Time up of EX-open
4:Time up of EX-close.

3) Display of no disc error

Display
E**D##$$&&

Notes:
**: The number of mechanical error.(“00” is latest one)
(Press the [REPEAT] button to changes next error display)
##:
01:Focus error
02:GFS error
03:Set up error
$$:
00:No disc error when does not chucking retry.
02:No disc error when chucking retry to completion.
&&: The state when judged no disc error. (Second figure is not used)
1:Stop
2:Set up
3:TOC read
4:Access
5:Play
6:Pause
7:Manual search (Play)
8:Manual search (Pause)

Schematic diagrams









Tuesday, March 30, 2021

Philips HTS 5540, HTS 5550 – factory setting, password change, upgrading the software, shematic diagram - DVD Home Theater System

 

System, Region Code, etc. Setting Procedure


Restore factory setting

a)Press <SETUP> button on R/C
b) Select <preference setup> ,then press < OK >
c) Select <default>, then press <OK> to confirm.

Version control change
a) Open the Door , and then press “1” “5” “9” on RC.
b) Press <OK> button on RC.
c) TV will show message as follow:

Password change
a) Press <SETUP> button on R/C.
b) Select <preference setup> , and then press <OK>
c) Select <password> <change> and then press <OK> to confirm.
(“
0000” is default password supplied.)

Trade model
a) Press <Open/Close> button on R/C.
b) Press “
2” “5” “9” on R/C,VFD will display “TRA ON “ or “TRA OFF“

Check on software version
a) Press <SETUP> button on R/C.
b) Select <preference setup> and then press <OK>
c) Select <version info> and itthen press <OK>
d) TV will show message as follow:

Upgrading new software
a) Copy the latest upgrading software onto a CD-R or USB storage device.
b) Insert the CD-R program disc or connect the USB storage device to the home theater.
c) TV will show relevent message.

d) Select <OK>,the home theater will start to upgrading automatically.
Note: when upgrade in progress, please do not unplug or switch off the device.  When the updated is complete, the home theater automatically switch to standby.

[Only a qualified service person should reprogram the Region Code.]

Wiring diagram



Display board schematic and PWB



Circuit diagram [Schematic]



Power supply [SMPS] schematic and PWB



TAS 5152: Digital power amplifier schematic



Monday, March 15, 2021

KUBO LCD TV – Hitachi 32HB4T62 - Hitachi 32290DLBN – Vestel 17IPS62 – MB82S troubleshooting – Service Mode - Schematic diagram

 

No sound, LED blinking, standby ON/OFF, No signal. Service menu settings – Vestel 17IPS62, Vestel MB82S

AUDIO AMPLIFIER-TAS5721 (optional)

 The TAS5721 is a 15-W stereo or 2x10 W + 1x15 W2.1 device, efficient, digital audio-power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers. The TAS5721 is a slave-only device receiving all clocks from external sources. The TAS5721 operates with a PWM carrier between a 384-kHz switching rate and a 352-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth- order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

Audio Input-Output
– 15Wx2 into 8Ω
– Supports Single Device 0.1, 2.0, 2.1 Modes
– Wide PVDD Range, From 4.5 V to 26 V Performance
– Efficient Class-D Operation Eliminates Need for Heatsinks
– Requires Only 3.3 V and PVDD
– One Serial Audio Input (Two Audio Channels)
– I2C Address Selection via PIN (Chip Select)
– Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
– External Headphone-Amplifier Shutdown Signal
– Integrated CAP
Free Headphone Amplifier
– Stereo Headphone (Stereo 2
V RMS Line Driver) Outputs
• Audio/PWM Processing
– Independent Channel Volume Controls With The 24-dB to Mute
– Separate Dynamic Range Control for Satellite and Sub Channels
– 21 Programmable Biquads for Speaker EQ
– Programmable Coefficients for DRC Filters
– DC Blocking Filters
– Support for 3D Effects
• General Features
– Serial Control Interface Operational Without MCLK
– Factory-Trimmed Internal Oscillator for Automatic Rate Detection
– Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
– Thermal and Short-Circuit Protection

POWER STAGE

The DC voltages required at various parts of the chassis and panel are provided by a main power supply unit. MB82S chassis can operate with PW05, IPS60, IPS70, IPS16, IPS17, IPS19, PW25, PW26, PW82-3, PW03, PW04, PW06, PW07 as main power supply and also with 12V adaptor.
Which power board can be used for board to board or cable connection?
Board to board (BTB) : PW05, IPS60, IPS70, IPS16, IPS17, IPS19
Power Cable : PW25, PW26, PW82-3, PW03, PW04, PW06, PW07
The power supplies generate 24V, 12V, 5V, 3,3V and 12V, 5V, 3.3V stand by mode DC voltages. Power stage which is on-chassis generates 5V, 3V3 stand by voltage and 12V, 8V, 5V, 3V3, 2.5V, 1,8V and 1,2V supplies for other different parts of the chassis.
 For PW26 and PW27 just common blocks are enough for proper operation.
Short CCT Protection Circuit
Short circuit protection is necessary for protecting chassis and main IC against damages when any Vcc supply shorts to ground. Protect pin should be logic high while normal operation. When there is a short circuit protect pin should be logic low. After any short detection, SW forces LEDs on LED card to blink.

Panel Supply Switch Circuit
This switch is used to open and close panel supply of TCON. It is controlled by port of main u-controller. Also with this circuit panel sequence could be adjusted correctly. 3 panel supplies are connected to this circuit. All of them are optional according to panels.

SERVICE MENU SETTINGS
In order to reach service menu, First Press “MENU” Then press the remote control code two times, which is “4725”.
In first screen following items can be seen (MB8x is same as MB6x service menu):

USB Operations
USB operations option can not be used directly. It can be used for updating panel tool, hw configuration etc.

SOFTWARE UPDATE
In MB82 project there is only one software. From following steps software update procedure can be seen:
1. MB82.bin directly inside of a flash memory (not in a folder).
2. Put flash memory to the TV when TV is powered off.
3. Power ON the and OK button on the remote control when the TV is opened.
4. If First Time Installation screen comes, it means software update procedure is successful.

TROUBLESHOOTING: No Backlight Problem
Problem: If TV is working, led is normal and there is no picture and backlight on the panel.
Possible causes: Backlight pin, dimming pin, backlight supply, stby on/off pin Backlight pin should be high in open position. If it is low, please check Q30 and panel cables.

Dimming pin should be high or square wave in open position. If it is low, please check S16 for Mstar side and panel or power cables, connectors.

Backlight power supply should be in panel specs. Please check CN4 for MB82, related connectors for power supply cards.


CI Module Problem
Problem: CI is not working when CI module inserted.
Possible causes: Supply, supply control pin, detect pins, mechanical positions of pins CI supply should be 5V when CI module inserted. If it is not 5V please check CI-POWER-CTRL, this pin should be low.

Please check mechanical positions of CI module.
Detect ports should be low. If it is not low please check CI connector pins, CI module pins and 3V3-VCC on MB82.

Led Blinking Problem
Problem: LED blinking, no other operation
This problem indicates a short on Vcc voltages. Protect pin should be logic high while normal operation. When there is a short circuit protect pin will be logic low. If you detect logic low on protect pin, unplug the TV set and measure the control voltage points with a multimeter to find the shorted voltage to ground.

No Sound Problem
Problem: No audio at main TV speaker outputs.
Check supply voltages of VDD-AUDIO, 5V-VCC or 12V-VCC with a voltage-meter.
There may be a problem in headphone connector or headphone detect circuit (when headphone is connected, speakers are automatically muted). Measure voltage at HP-DETECT pin, it should be 3.3v.

No Sound Problem at Headphone
Problem: No audio at headphone output.
Check HP detect pin, when headphone is. Check 5V-VCC and 3V3-VCC with a voltage meter.

Standby On/Off Problem
Device cannot boot, TV hangs in standby mode.
There may be a problem about power supply. Check 12V-VCC, 5V-VCC and 3V3-VCC with a voltage-meter. Also there may be a problem about SW. Try to update TV with latest SW. Additionally it is good to check SW printouts via hyper-terminal (or Tera term). These printouts may give a clue about the problem.

No Signal Problem
Problem: No signal in TV mode.
Check tuner supply voltage; 3V3-TUN. Check tuner options are correctly set in Service menu. Check AGC voltage at IF-AGC pin of tuner.

Schematic diagram