Sony PFM-32C1, Service Manual

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2-1
PFM-32C1/32C1E
2-1. Equipment Required
.
Oscilloscope
Tektronix 2465 or equivalent
(band width : 350 MHz or more)
. VG (Programmable video signal generator)
VG814 or equivalent
.
Frequency counter
Advantest TR5821AK or equivalent
. Digital voltmeter
Advantest TR6845 or equivalent
.
Potential transformer
.
Regulated DC power supply
.
Remote commander (RM-971)
n
Perform the following adjustments at least 5 minutes after
turning on the power.
2-2. Electrical Adjustments Using the
Service Mode
The electrical adjustments can be performed using the remote
commander RM-42B supplied with the PFM-32C1/32C1E. The
remote commander has the Service Mode. Select the Service
Mode to perform the electrical adjustments as listed below.
..... Service Mode
When the machine enters the service menu, the “Service
Mode” submenu is displayed in addition to the ordinary
user menu. The electrical adjustment is executed using the
“Service Mode” submenu.
How to enter the Service Mode using the RM-971 :
In the STAND-BY state, press the keys in the following
order.
[DISPLAY]
→
[5]
→
[VOL+]
→
[POWER|ON]
Press the
[STBY]
key once and back on to enter the STAND-
BY state or turn off the main power to exit the Service Mode.
..... Operation of remote commander in the Service
Mode
The six keys of MENU, ENTER,
←, →, ↑
and
↓
are the
basic operation keys in the same manner as in the user
adjustment. The other keys can be operated in the same
manner as in the user adjustment.
..... The electrical adjustments using the Service
Mode become necessary in the following cases.
When either one of the following adjustment is made,
adjustment using the service mode becomes necessary.
Section 2
Electrical Adjustments
Chroma Decoder
AD Converter
White Balance
When IC403/B board and its
peripheral part is replaced.
AD Converter
When PDP is replaced.
White Balance
When memory (IC1007) on the
B board is replaced. EEP ROM Initialize
Chroma Decoder
AD Converter
White Balance
General
Service Status
When any of the circuit boards
below is replaced.
B board
Q board
S board
Chroma Decoder
AD Converter
Service Status
Service Status
When any repair related to picture
quality is executed.
Operation confirmation only
Service Mode
EEP ROM Initialize Initializes the EEP ROM
Chroma Decoder Chroma decoder adjustment
AD Converte A/D converter adjustment
White Balance White balance adjustment
General Other adjustments and the
Manual Control functions required for confirmation
Preset Edit Factory check menu (Not used in service)
Service Status Editing the preset signal
Internal status confirmation