Test Mode; General Description - Sony ZS-2000 Service Manual

4-1. GENERAL DESCRIPTION

This set has the TEST MODE that allows the CD unit to be
operational checked.

4-2. TEST MODE

4-2-1. Setting the test mode
Short the TEST-A land on the SWITCH(1) BOARD to open it (or
short between JW824 and JW825 to open the circuit).
4-2-2. Releasing the test mode
After the test mode is complete, turn the power off to release the
mode.
4-2-3. The contents of test mode
Mode name
STOP 1
STOP 2
FOCUS
ALL SERVO
T.G UP
SLED FWD
SLED REV
FOCUS FWD
FOCUS REV
LPC OFF
SECTION 4
TEST MODE
The initial state and command are reset and the initial value is set.
After resetting, Stop 2 is switched to.
Stopped state.
FF/FR KEYis used to operate the SLED(PICK-UP).
The automatic adjustment value is held.
FOCUS SERVO: ON. CLV-S TRACKING & SLED SERVO: OFF
If FOCUS SERVO does not turn on, for example, without disc,
FOUCS SEARCH is performed limitlessly.
When FOCUS SERVO is turned on, LPC is turned on and 'PGM' is
displayed.
All SERVOs are turned on. When LPC is turned on, 'PGM' is displayed.
After automatic adjustment, ' r = ' is displayed. If the automatic adjustment
value is manually changed, 'SHUF' is displayed.
With SERVO OFF, TRACKING in the GAIN UP state.
LPC is turned on.
With SERVO OFF, SLED (PICK-UP) is moved to the outer circumference.
With SERVO OFF, SLED (PICK-UP) is moved to the inner circumference.
With FOCUS state, SLED(PICK-UP) is moved to the outer circumference.
With FOCUS state, SLED (PICK-UP) is moved to the inner circumference.
When all SERVOs are on and LPC is off, 'PGM' is turned off.
When LPC is on, PGM' is turned on.
– SWITCH (1) BOARD –
TEST-A
SLEEP
88
LCD display
(test item)
Description
– 17 –
RADIO/BAND
AUTO PRESET
CLOCK TIMER
Display
x x xx
LCD display
88
88
v=
r=
r¢
u1
u2
v1
v2
-