Symptom:
* During DVD playback, the display and/or picture freezes and the function keys become inoperable intermittently.
* The message "READING" is displayed and no playback is possible.
* After turning the set on, the model name is displayed correctly but no other indication will appear afterwards.
* Noise may be heard from the speakers or the headphones.

Cause:
Malfunctioning AV decoder IC207 (ZIVA5X-C2F) on the DMB03 Board.

Remedy:
Confirm the type of IC207 installed, and the waveform at pin 203 as outlined below. Replace IC207 if necessary.
1. Confirming the IC207 Type
* Check the IC207 type by reading its inscription. If the type description "C1" is printed on it, continue to check the waveform at pin 203. If "C2" is printed on it and the lot number ranges between WYF***** and WYG24***, proceed to confirm the waveform at pin 203 as well.
* In case the lot number printed on IC207 is WYG25*** or higher, or a white circle marking is found on it, or the type description is "C2 B", the procedure described in this bulletin is not to be applied.
2. Confirming the Waveform at IC207 Pin 203
* Turn on the set and measure the waveform at IC207 pin 203 (BUS CLK = clock signal). Confirm that the waveform is clearly rectangular as shown on the left below. If the waveform is as shown in the middle or on the right, replace IC207 with the improved type listed below.
* If the waveform is correct as shown on the left, also confirm the waveform at IC207 pin 147 (XCK = clock signal). The waveform at pin 147 should be similar to the correct sample waveform at pin 203. If this is not the case, replace IC207 with the improved type.
Former New
Ref. Description Part number Description Part number
IC207 ZIVA5X-C2F 6-704-630-01 ZIVA5X-C1F 6-707-406-01
NOTE
* The frequency of the BUS CLK (pin 203) signal being about 37 MHz and about 11 MHz for the XCK (pin 147) signal, use an oscilloscope with a bandwidth of at least 100 MHz. Also the use of a FET probe for measurement is recommended.
* The symptoms described above may appear due to probe noise or shorting adjacent pins when checking the waveform at pin 203 or pin 147. If this occurs, turn the set off and on, and then measure the waveform at pin 203 and pin 147 again.
APPLICABLE SERIAL NUMBERS
AVD-K800P: All
HCD-EA20 : All
HCD-SA30 : All
HCD-SA35K: All
HCD-WZ8D : All
HCD-WZ80D: All